├── .dockerignore ├── src └── main │ ├── resources │ ├── bg.png │ ├── bg.sh │ ├── log4j-dev.properties │ ├── log4j-plantuml.properties │ ├── log4j-prod.properties │ └── ui │ │ └── umlsource.html │ └── java │ ├── com │ └── nitor │ │ └── plantuml │ │ ├── lambda │ │ ├── DiagramType.java │ │ ├── exception │ │ │ ├── StatusCodeException.java │ │ │ └── BadRequestException.java │ │ ├── SyntaxCheckResult.java │ │ ├── UIHandler.java │ │ ├── SyntaxHandler.java │ │ ├── MapHandler.java │ │ ├── TxtHandler.java │ │ ├── SvgHandler.java │ │ ├── UmlHandler.java │ │ ├── PngHandler.java │ │ └── LambdaBase.java │ │ ├── DiagramTypeUtil.java │ │ └── PlantUmlUtil.java │ └── net │ └── sourceforge │ └── plantuml │ └── servlet │ └── utility │ └── UmlExtractor.java ├── .npmignore ├── .gitignore ├── serverlessrepo ├── serverlessrepo-publish.sh └── README.md ├── ui ├── build │ └── build.js ├── package-lock.json └── index.html ├── package.json ├── lambdacontainer └── Dockerfile ├── test.html ├── README.md ├── sam-deploy.sh ├── serverless.yml ├── pom.xml ├── template.yml └── LICENSE /.dockerignore: -------------------------------------------------------------------------------- 1 | **/node_modules 2 | bin 3 | -------------------------------------------------------------------------------- /src/main/resources/bg.png: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/mmajis/plantuml-serverless/HEAD/src/main/resources/bg.png -------------------------------------------------------------------------------- /.npmignore: -------------------------------------------------------------------------------- 1 | *.class 2 | target 3 | 4 | # Package Files 5 | *.jar 6 | *.war 7 | *.ear 8 | 9 | # Serverless directories 10 | .serverless -------------------------------------------------------------------------------- /src/main/resources/bg.sh: -------------------------------------------------------------------------------- 1 | #!/bin/bash 2 | 3 | echo "Grid background script starting" 4 | 5 | diagram=$1 6 | tile=$2 7 | background=$3 8 | output=$4 9 | dim=$(identify -format "%[fx:w]x%[fx:h]" $diagram) 10 | 11 | composite -tile $tile -size $dim xc:none png:- | convert - -negate $background 12 | 13 | convert $background $diagram -flatten $output 14 | -------------------------------------------------------------------------------- /src/main/resources/log4j-dev.properties: -------------------------------------------------------------------------------- 1 | log = . 2 | log4j.rootLogger = DEBUG, LAMBDA 3 | 4 | #Define the LAMBDA appender 5 | log4j.appender.LAMBDA=com.amazonaws.services.lambda.runtime.log4j.LambdaAppender 6 | log4j.appender.LAMBDA.layout=org.apache.log4j.PatternLayout 7 | log4j.appender.LAMBDA.layout.conversionPattern=%d{yyyy-MM-dd HH:mm:ss} <%X{AWSRequestId}> %-5p %c{1}:%L - %m%n -------------------------------------------------------------------------------- /src/main/resources/log4j-plantuml.properties: -------------------------------------------------------------------------------- 1 | log = . 2 | log4j.rootLogger = INFO, LAMBDA 3 | 4 | #Define the LAMBDA appender 5 | log4j.appender.LAMBDA=com.amazonaws.services.lambda.runtime.log4j.LambdaAppender 6 | log4j.appender.LAMBDA.layout=org.apache.log4j.PatternLayout 7 | log4j.appender.LAMBDA.layout.conversionPattern=%d{yyyy-MM-dd HH:mm:ss} <%X{AWSRequestId}> %-5p %c{1}:%L - %m%n -------------------------------------------------------------------------------- /src/main/resources/log4j-prod.properties: -------------------------------------------------------------------------------- 1 | log = . 2 | log4j.rootLogger = INFO, LAMBDA 3 | 4 | #Define the LAMBDA appender 5 | log4j.appender.LAMBDA=com.amazonaws.services.lambda.runtime.log4j.LambdaAppender 6 | log4j.appender.LAMBDA.layout=org.apache.log4j.PatternLayout 7 | log4j.appender.LAMBDA.layout.conversionPattern=%d{yyyy-MM-dd HH:mm:ss} <%X{AWSRequestId}> %-5p %c{1}:%L - %m%n -------------------------------------------------------------------------------- /src/main/java/com/nitor/plantuml/lambda/DiagramType.java: -------------------------------------------------------------------------------- 1 | package com.nitor.plantuml.lambda; 2 | 3 | public enum DiagramType { 4 | 5 | IMAGE_PNG("image/png"), IMAGE_SVG_XML("image/svg+xml;charset=UTF-8"), TEXT_PLAIN("text/plain;charset=UTF-8"), 6 | IMAGEMAP("text/plain;charset=UTF-8"); 7 | 8 | private String mimeType; 9 | 10 | DiagramType(String mimeType) { 11 | this.mimeType = mimeType; 12 | } 13 | 14 | public String getMimeType() { 15 | return mimeType; 16 | } 17 | 18 | } 19 | -------------------------------------------------------------------------------- /src/main/java/com/nitor/plantuml/lambda/exception/StatusCodeException.java: -------------------------------------------------------------------------------- 1 | package com.nitor.plantuml.lambda.exception; 2 | 3 | public abstract class StatusCodeException extends RuntimeException { 4 | 5 | public StatusCodeException() { 6 | super(); 7 | } 8 | 9 | public StatusCodeException(String message) { 10 | super(message); 11 | } 12 | 13 | public StatusCodeException(String message, Throwable cause) { 14 | super(message, cause); 15 | } 16 | 17 | public abstract String getStatusCode(); 18 | } 19 | -------------------------------------------------------------------------------- /.gitignore: -------------------------------------------------------------------------------- 1 | .idea 2 | .serverless 3 | *.iml 4 | 5 | ## File-based project format: 6 | *.iws 7 | 8 | ## Plugin-specific files: 9 | 10 | # IntelliJ 11 | /out/ 12 | 13 | # mpeltonen/sbt-idea plugin 14 | .idea_modules/ 15 | 16 | # JIRA plugin 17 | atlassian-ide-plugin.xml 18 | 19 | aws 20 | target 21 | *reduced-pom.xml 22 | 23 | #macOS 24 | .DS_Store 25 | 26 | node_modules 27 | bin 28 | 29 | #UI 30 | ui/dist 31 | 32 | #dot 33 | dot/build 34 | 35 | .classpath 36 | .project 37 | .settings/ 38 | 39 | .vscode/ 40 | .sts4-cache/ 41 | 42 | .aws-sam/ 43 | -------------------------------------------------------------------------------- /src/main/java/com/nitor/plantuml/lambda/exception/BadRequestException.java: -------------------------------------------------------------------------------- 1 | package com.nitor.plantuml.lambda.exception; 2 | 3 | public class BadRequestException extends StatusCodeException { 4 | 5 | private final static String STATUS_CODE = "400"; 6 | 7 | public BadRequestException() { 8 | super(); 9 | } 10 | 11 | public BadRequestException(String message) { 12 | super(message); 13 | } 14 | 15 | public BadRequestException(String message, Throwable cause) { 16 | super(message, cause); 17 | } 18 | 19 | public String getStatusCode() { 20 | return STATUS_CODE; 21 | } 22 | } 23 | -------------------------------------------------------------------------------- /serverlessrepo/serverlessrepo-publish.sh: -------------------------------------------------------------------------------- 1 | aws --region us-east-1 serverlessrepo create-application-version --application-id arn:aws:serverlessrepo:us-east-1:293246570391:applications/plantuml-render --semantic-version 0.0.8 --source-code-url https://github.com/mmajis/plantuml-serverless/releases/tag/v0.0.9 --template-body file://.aws-sam/build/template.yaml 2 | #maybe this could be the future: 3 | #sam publish --region us-east-1 --template .aws-sam/build/template.yaml --semantic-version 0.0.9 4 | 5 | # The issue here is that serverless application repository doesn't appear to support lambdas with PackageType: Image (containers) 6 | -------------------------------------------------------------------------------- /ui/build/build.js: -------------------------------------------------------------------------------- 1 | const minify = require('html-minifier').minify; 2 | const fs = require('fs'); 3 | const path = require('path'); 4 | 5 | const srcDir = 'ui'; 6 | const targetDir = 'target' + path.sep + 'classes' + path.sep + 'ui'; 7 | 8 | var html = fs.readFileSync(srcDir + path.sep + 'index.html', 'utf8'); 9 | var result = minify(html, { 10 | removeAttributeQuotes: true, 11 | collapseWhitespace: true, 12 | conservativeCollapse: true, 13 | minifyCSS: true, 14 | minifyJS: true, 15 | removeComments: true 16 | }); 17 | if (!fs.existsSync(targetDir)){ 18 | fs.mkdirSync(targetDir); 19 | } 20 | fs.writeFileSync(targetDir + path.sep + 'index.html', result); -------------------------------------------------------------------------------- /src/main/resources/ui/umlsource.html: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | Reveal UML Source 5 | 6 | 7 | 16 | 
{{uml_source}}
17 | 18 | 19 | 20 | -------------------------------------------------------------------------------- /src/main/java/com/nitor/plantuml/DiagramTypeUtil.java: -------------------------------------------------------------------------------- 1 | package com.nitor.plantuml; 2 | 3 | import com.nitor.plantuml.lambda.DiagramType; 4 | import net.sourceforge.plantuml.FileFormat; 5 | import org.apache.log4j.Logger; 6 | 7 | class DiagramTypeUtil { 8 | 9 | private static Logger logger = Logger.getLogger(DiagramTypeUtil.class); 10 | 11 | static FileFormat asFileFormat(DiagramType diagramType) { 12 | switch (diagramType) { 13 | case IMAGE_PNG: 14 | return FileFormat.PNG; 15 | case IMAGE_SVG_XML: 16 | return FileFormat.SVG; 17 | case TEXT_PLAIN: 18 | return FileFormat.UTXT; 19 | default: 20 | logger.debug("Defaulting to PNG diagram"); 21 | return FileFormat.PNG; 22 | } 23 | } 24 | } 25 | -------------------------------------------------------------------------------- /package.json: -------------------------------------------------------------------------------- 1 | { 2 | "name": "plantuml-serverless", 3 | "version": "0.0.7-SNAPSHOT", 4 | "description": "Render PlantUML diagrams", 5 | "main": "index.js", 6 | "dependencies": { 7 | "html-minifier": "^4.0.0", 8 | "serverless": "^2.70.0" 9 | }, 10 | "devDependencies": { 11 | "serverless-certificate-creator": "^1.6.0", 12 | "serverless-domain-manager": "^5.2.0" 13 | }, 14 | "scripts": { 15 | "test": "echo \"Error: no test specified\" && exit 1" 16 | }, 17 | "repository": { 18 | "type": "git", 19 | "url": "git+https://github.com/mmajis/plantuml-serverless.git" 20 | }, 21 | "keywords": [ 22 | "plantuml", 23 | "serverless" 24 | ], 25 | "author": "Mika Majakorpi", 26 | "license": "GPL-3.0", 27 | "bugs": { 28 | "url": "https://github.com/mmajis/plantuml-serverless/issues" 29 | }, 30 | "homepage": "https://github.com/mmajis/plantuml-serverless#readme" 31 | } 32 | -------------------------------------------------------------------------------- /src/main/java/com/nitor/plantuml/lambda/SyntaxCheckResult.java: -------------------------------------------------------------------------------- 1 | package com.nitor.plantuml.lambda; 2 | 3 | import java.util.List; 4 | 5 | public class SyntaxCheckResult { 6 | 7 | private final boolean isError; 8 | private final List errors; 9 | private final String diagramType; 10 | private final String errorLocation; 11 | 12 | public SyntaxCheckResult(boolean isError, String diagramType, String errorLocation, List errors) { 13 | this.isError = isError; 14 | this.diagramType = diagramType; 15 | this.errorLocation = errorLocation; 16 | this.errors = errors; 17 | } 18 | 19 | public boolean isError() { 20 | return isError; 21 | } 22 | 23 | public List getErrors() { 24 | return errors; 25 | } 26 | 27 | public String getDiagramType() { 28 | return diagramType; 29 | } 30 | 31 | public String getErrorLocation() { 32 | return errorLocation; 33 | } 34 | } 35 | -------------------------------------------------------------------------------- /lambdacontainer/Dockerfile: -------------------------------------------------------------------------------- 1 | FROM public.ecr.aws/lambda/java:11 AS dotbuild 2 | 3 | RUN mkdir build 4 | RUN yum install -y curl tar gzip 5 | RUN curl https://www2.graphviz.org/Packages/stable/portable_source/graphviz-2.42.3.tar.gz -o build/graphviz-2.42.3.tar.gz 6 | RUN tar zxvf build/graphviz-2.42.3.tar.gz -C build 7 | RUN yum groupinstall -y 'Development Tools' 8 | RUN yum install -y expat-devel 9 | RUN cd build/graphviz-2.42.3 && pwd && ./configure --enable-static=yes --with-expat=yes && make 10 | 11 | FROM public.ecr.aws/lambda/java:11 12 | 13 | RUN yum install -y fontconfig && yum clean all 14 | 15 | # Copy function code and runtime dependencies from Maven layout 16 | COPY --from=dotbuild /var/task/build/graphviz-2.42.3/cmd/dot/dot_static /opt/dot_static 17 | COPY target/classes ${LAMBDA_TASK_ROOT} 18 | COPY target/dependency/* ${LAMBDA_TASK_ROOT}/lib/ 19 | 20 | # Set the CMD to your handler (could also be done as a parameter override outside of the Dockerfile) 21 | #CMD [ "com.example.LambdaHandler::handleRequest" ] 22 | -------------------------------------------------------------------------------- /src/main/java/com/nitor/plantuml/lambda/UIHandler.java: -------------------------------------------------------------------------------- 1 | package com.nitor.plantuml.lambda; 2 | 3 | import com.amazonaws.services.lambda.runtime.Context; 4 | import com.amazonaws.services.lambda.runtime.RequestStreamHandler; 5 | import org.apache.http.HttpStatus; 6 | import org.apache.log4j.Logger; 7 | import org.json.simple.JSONObject; 8 | 9 | import java.io.*; 10 | import java.util.stream.Stream; 11 | 12 | public class UIHandler extends LambdaBase implements RequestStreamHandler { 13 | 14 | private static final Logger logger = Logger.getLogger(UIHandler.class); 15 | private static final String CONTENT_CLASSPATH = "/ui/index.html"; 16 | 17 | @Override 18 | public void handleRequest(InputStream inputStream, OutputStream outputStream, Context context) throws IOException { 19 | JSONObject event = parseEvent(inputStream); 20 | String path = (String)((JSONObject)event.get("requestContext")).get("path"); 21 | logger.debug("Path: " + path); 22 | if (path != null && !path.endsWith("/")) { 23 | sendRedirectResponse(outputStream, path + "/"); 24 | return; 25 | } 26 | 27 | InputStream content = this.getClass().getResourceAsStream(CONTENT_CLASSPATH); 28 | BufferedReader br = new BufferedReader(new InputStreamReader((content))); 29 | StringBuffer sb = new StringBuffer(); 30 | 31 | Stream stream = br.lines(); 32 | stream.forEach(l -> sb.append(l)); 33 | 34 | sendHTMLResponse(outputStream, sb.toString(), String.valueOf(HttpStatus.SC_OK)); 35 | content.close(); 36 | } 37 | } -------------------------------------------------------------------------------- /src/main/java/com/nitor/plantuml/lambda/SyntaxHandler.java: -------------------------------------------------------------------------------- 1 | package com.nitor.plantuml.lambda; 2 | 3 | import com.amazonaws.services.lambda.runtime.Context; 4 | import com.amazonaws.services.lambda.runtime.RequestStreamHandler; 5 | import com.google.gson.Gson; 6 | import com.google.gson.GsonBuilder; 7 | import com.nitor.plantuml.PlantUmlUtil; 8 | import com.nitor.plantuml.lambda.exception.StatusCodeException; 9 | import org.apache.http.HttpStatus; 10 | import org.json.simple.JSONObject; 11 | 12 | import java.io.IOException; 13 | import java.io.InputStream; 14 | import java.io.OutputStream; 15 | import java.util.Base64; 16 | 17 | public class SyntaxHandler extends LambdaBase implements RequestStreamHandler { 18 | 19 | private final PlantUmlUtil plantUmlUtil = new PlantUmlUtil(); 20 | 21 | @Override 22 | public void handleRequest(InputStream inputStream, OutputStream outputStream, Context context) throws IOException { 23 | try { 24 | JSONObject event = parseEvent(inputStream); 25 | String encodedUml = getEncodedUml(event); 26 | SyntaxCheckResult syntaxCheckResult = plantUmlUtil.checkSyntax(encodedUml); 27 | Gson gson = new GsonBuilder().create(); 28 | String json = gson.toJson(syntaxCheckResult); 29 | String base64Response = Base64.getEncoder().encodeToString(json.getBytes()); 30 | if (!syntaxCheckResult.isError()) { 31 | sendOKJSONResponse(outputStream, base64Response); 32 | } else { 33 | sendJSONResponse(outputStream, base64Response, String.valueOf(HttpStatus.SC_UNPROCESSABLE_ENTITY)); 34 | } 35 | } catch (StatusCodeException sce) { 36 | sendExceptionResponse(outputStream, sce); 37 | } 38 | } 39 | 40 | } -------------------------------------------------------------------------------- /test.html: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 5 | Title 6 | 7 | 8 |

PNG Sequence Diagram

9 | 10 |

SVG Component Diagram

11 | 12 |

TXT Class Diagram

13 | 

14 | 
15 | 
21 | 
22 | 
Image map

23 | 
24 | 
25 | 

26 | 
32 | 


--------------------------------------------------------------------------------
/src/main/java/com/nitor/plantuml/lambda/MapHandler.java:
--------------------------------------------------------------------------------
 1 | package com.nitor.plantuml.lambda;
 2 | 
 3 | import com.amazonaws.services.lambda.runtime.Context;
 4 | import com.amazonaws.services.lambda.runtime.RequestStreamHandler;
 5 | import com.nitor.plantuml.PlantUmlUtil;
 6 | import com.nitor.plantuml.lambda.exception.StatusCodeException;
 7 | import net.sourceforge.plantuml.SourceStringReader;
 8 | import org.apache.http.HttpStatus;
 9 | import org.json.simple.JSONObject;
10 | 
11 | import java.io.IOException;
12 | import java.io.InputStream;
13 | import java.io.OutputStream;
14 | import java.util.Base64;
15 | import java.util.Collections;
16 | 
17 | public class MapHandler extends LambdaBase implements RequestStreamHandler {
18 | 
19 |     private static final String TYPE_IDENTIFIER = "map";
20 |     private final PlantUmlUtil plantUmlUtil = new PlantUmlUtil();
21 | 
22 |     @Override
23 |     public void handleRequest(InputStream inputStream, OutputStream outputStream, Context context) throws IOException {
24 |         JSONObject event = parseEvent(inputStream);
25 |         String encodedUml = getEncodedUml(event);
26 |         final String etag = plantUmlUtil.getEtag(encodedUml, TYPE_IDENTIFIER);
27 |         if (isMatchingEtag(event, etag)) {
28 |             send304Response(outputStream, Collections.emptyMap());
29 |             return;
30 |         }
31 |         try {
32 |             SourceStringReader reader = plantUmlUtil.readDiagram(encodedUml);
33 |             String imageMap = plantUmlUtil.renderImageMap(reader);
34 |             String base64Response = Base64.getEncoder().encodeToString(imageMap.getBytes());
35 |             SyntaxCheckResult syntaxCheckResult = plantUmlUtil.checkSyntax(encodedUml);
36 |             if (!syntaxCheckResult.isError()) {
37 |                 sendOKDiagramResponse(outputStream, base64Response, DiagramType.IMAGEMAP,
38 |                         getCacheHeaders(etag, DEFAULT_MAX_AGE));
39 |             } else {
40 |                 sendDiagramResponse(outputStream, base64Response, DiagramType.IMAGEMAP,
41 |                         String.valueOf(HttpStatus.SC_UNPROCESSABLE_ENTITY));
42 |             }
43 |         } catch (StatusCodeException sce) {
44 |             sendExceptionResponse(outputStream, sce);
45 |         }
46 |     }
47 | 
48 | }


--------------------------------------------------------------------------------
/src/main/java/com/nitor/plantuml/lambda/TxtHandler.java:
--------------------------------------------------------------------------------
 1 | package com.nitor.plantuml.lambda;
 2 | 
 3 | import com.amazonaws.services.lambda.runtime.Context;
 4 | import com.amazonaws.services.lambda.runtime.RequestStreamHandler;
 5 | import com.nitor.plantuml.PlantUmlUtil;
 6 | import com.nitor.plantuml.lambda.exception.StatusCodeException;
 7 | import net.sourceforge.plantuml.SourceStringReader;
 8 | import org.apache.http.HttpStatus;
 9 | import org.json.simple.JSONObject;
10 | 
11 | import java.io.ByteArrayOutputStream;
12 | import java.io.IOException;
13 | import java.io.InputStream;
14 | import java.io.OutputStream;
15 | import java.util.Base64;
16 | import java.util.Collections;
17 | 
18 | public class TxtHandler extends LambdaBase implements RequestStreamHandler {
19 | 
20 |     private static final String TYPE_IDENTIFIER = "txt";
21 |     private final PlantUmlUtil plantUmlUtil = new PlantUmlUtil();
22 | 
23 |     @Override
24 |     public void handleRequest(InputStream inputStream, OutputStream outputStream, Context context) throws IOException {
25 |         JSONObject event = parseEvent(inputStream);
26 |         String encodedUml = getEncodedUml(event);
27 |         final String etag = plantUmlUtil.getEtag(encodedUml, TYPE_IDENTIFIER);
28 |         if (isMatchingEtag(event, etag)) {
29 |             send304Response(outputStream, Collections.emptyMap());
30 |             return;
31 |         }
32 |         try {
33 |             SourceStringReader reader = plantUmlUtil.readDiagram(encodedUml);
34 |             ByteArrayOutputStream baos = plantUmlUtil.renderDiagram(reader, DiagramType.TEXT_PLAIN);
35 |             byte[] bytes = baos.toByteArray();
36 |             String base64Response = Base64.getEncoder().encodeToString(bytes);
37 |             SyntaxCheckResult syntaxCheckResult = plantUmlUtil.checkSyntax(encodedUml);
38 |             if (!syntaxCheckResult.isError()) {
39 |                 sendOKDiagramResponse(outputStream, base64Response, DiagramType.TEXT_PLAIN,
40 |                         getCacheHeaders(etag, DEFAULT_MAX_AGE));
41 |             } else {
42 |                 sendDiagramResponse(outputStream, base64Response, DiagramType.TEXT_PLAIN,
43 |                         String.valueOf(HttpStatus.SC_UNPROCESSABLE_ENTITY));
44 |             }
45 |         } catch (StatusCodeException sce) {
46 |             sendExceptionResponse(outputStream, sce);
47 |         }
48 |     }
49 | 
50 | }


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/src/main/java/com/nitor/plantuml/lambda/SvgHandler.java:
--------------------------------------------------------------------------------
 1 | package com.nitor.plantuml.lambda;
 2 | 
 3 | import com.amazonaws.services.lambda.runtime.Context;
 4 | import com.amazonaws.services.lambda.runtime.RequestStreamHandler;
 5 | import com.nitor.plantuml.PlantUmlUtil;
 6 | import com.nitor.plantuml.lambda.exception.StatusCodeException;
 7 | import net.sourceforge.plantuml.SourceStringReader;
 8 | import org.apache.http.HttpStatus;
 9 | import org.json.simple.JSONObject;
10 | 
11 | import java.io.ByteArrayOutputStream;
12 | import java.io.IOException;
13 | import java.io.InputStream;
14 | import java.io.OutputStream;
15 | import java.util.Base64;
16 | import java.util.Collections;
17 | 
18 | public class SvgHandler extends LambdaBase implements RequestStreamHandler {
19 |     private static final String TYPE_IDENTIFIER = "svg";
20 |     private final PlantUmlUtil plantUmlUtil = new PlantUmlUtil();
21 | 
22 |     @Override
23 |     public void handleRequest(InputStream inputStream, OutputStream outputStream, Context context) throws IOException {
24 |         JSONObject event = parseEvent(inputStream);
25 |         String encodedUml = getEncodedUml(event);
26 |         final String etag = plantUmlUtil.getEtag(encodedUml, TYPE_IDENTIFIER);
27 |         if (isMatchingEtag(event, etag)) {
28 |             send304Response(outputStream, Collections.emptyMap());
29 |             return;
30 |         }
31 | 
32 |         try {
33 |             SourceStringReader reader = plantUmlUtil.readDiagram(encodedUml);
34 |             ByteArrayOutputStream baos = plantUmlUtil.renderDiagram(reader, DiagramType.IMAGE_SVG_XML);
35 |             byte[] bytes = baos.toByteArray();
36 |             String base64Response = Base64.getEncoder().encodeToString(bytes);
37 |             SyntaxCheckResult syntaxCheckResult = plantUmlUtil.checkSyntax(encodedUml);
38 |             if (!syntaxCheckResult.isError()) {
39 |                 sendOKDiagramResponse(outputStream, base64Response, DiagramType.IMAGE_SVG_XML,
40 |                         getCacheHeaders(etag, DEFAULT_MAX_AGE));
41 |             } else {
42 |                 sendDiagramResponse(outputStream, base64Response,
43 |                         DiagramType.IMAGE_SVG_XML, String.valueOf(HttpStatus.SC_UNPROCESSABLE_ENTITY));
44 |             }
45 |         } catch (StatusCodeException sce) {
46 |             sendExceptionResponse(outputStream, sce);
47 |         }
48 |     }
49 | 
50 | }


--------------------------------------------------------------------------------
/serverlessrepo/README.md:
--------------------------------------------------------------------------------
 1 | # PlantUML Serverless
 2 | 
 3 | An API Gateway + Lambda service for rendering PlantUML diagrams. 
 4 | 
 5 | Try here before you deploy: 
 6 | 
 7 | To try your own deployment, see the stack outputs after deploying for UI and example diagram links.
 8 | 
 9 | A basic UI is provided at the root path: https://{apigw endpoint}/plantuml/.
10 | 
11 | ## Drop in replacement for official PlantUML server
12 | 
13 | This can be used as a drop in replacement for scenarios
14 | where http://www.plantuml.com/plantuml is used a a rendering endpoint. You can avoid sending the diagram source to a server outisde your control and use an encrypted HTTPS endpoint for the diagram traffic.
15 | 
16 | This doesn't support everything the official PlantUML server does but should be good for most intents and purposes (PNG, SVG and TXT rendering).
17 | 
18 | For example, to have Visual Studio Code PlantUML plugin render using your own serverless deployment, set the following properties in vscode for the plugin: 
19 | 
20 | ```json
21 |     "plantuml.render": "PlantUMLServer",
22 |     "plantuml.server": "https://your-endpoint-here"
23 | ```
24 | 
25 | Use `"plantuml.server": "https://plantuml.nitorio.us"` if you'd like to try before you deploy your own.
26 | 
27 | ## Details for API usage
28 | 
29 | The plantuml text to render needs to be encoded as described here: . The UI does the encoding and you can see the encoded source in the URL for the rendered diagram. Also, have a look at  to encode with a CLI.
30 | 
31 | Make requests like this: https://{apigw endpoint}/png/{encoded plantuml}
32 | 
33 | ## Example Diagrams
34 | 
35 | Example PNG diagram at : 
36 | 
37 | ![Example PNG diagram](https://plantuml.nitorio.us/png/SyfFKj2rKt3CoKnELR1Io4ZDoSa70000 "Example PNG diagram")
38 | 
39 | SVG format is also supported: 
40 | 
41 | ![Example SVG diagram](https://plantuml.nitorio.us/svg/SyfFKj2rKt3CoKnELR1Io4ZDoSa70000 "Example SVG diagram")
42 | 
43 | Made with ❤️ by [@mmajis](https://twitter.com/mmajis) at [@NitorCreations](https://twitter.com/NitorCreations). Available on the [AWS Serverless Application Repository](https://aws.amazon.com/serverless)
44 | 
45 | ## License
46 | 
47 | GNU General Public License v3.0 only (GPL-3.0)


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/src/main/java/com/nitor/plantuml/lambda/UmlHandler.java:
--------------------------------------------------------------------------------
 1 | package com.nitor.plantuml.lambda;
 2 | 
 3 | import com.amazonaws.services.lambda.runtime.Context;
 4 | import com.amazonaws.services.lambda.runtime.RequestStreamHandler;
 5 | import com.nitor.plantuml.PlantUmlUtil;
 6 | import com.nitor.plantuml.lambda.exception.StatusCodeException;
 7 | import org.apache.http.HttpStatus;
 8 | import org.json.simple.JSONObject;
 9 | 
10 | import java.io.BufferedReader;
11 | import java.io.IOException;
12 | import java.io.InputStream;
13 | import java.io.InputStreamReader;
14 | import java.io.OutputStream;
15 | import java.util.Collections;
16 | import java.util.Optional;
17 | import java.util.stream.Stream;
18 | 
19 | public class UmlHandler extends LambdaBase implements RequestStreamHandler {
20 |     private static final String TYPE_IDENTIFIER = "uml";
21 |     private static final String CONTENT_CLASSPATH = "/ui/umlsource.html";
22 |     private final PlantUmlUtil plantUmlUtil = new PlantUmlUtil();
23 | 
24 |     @Override
25 |     public void handleRequest(final InputStream inputStream,
26 |                               final OutputStream outputStream,
27 |                               final Context context) throws IOException {
28 |         JSONObject event = parseEvent(inputStream);
29 |         String encodedUml = Optional.ofNullable(getEncodedUml(event)).orElse("");
30 |         final String etag = plantUmlUtil.getEtag(encodedUml, TYPE_IDENTIFIER);
31 |         if (isMatchingEtag(event, etag)) {
32 |             send304Response(outputStream, Collections.emptyMap());
33 |             return;
34 |         }
35 | 
36 |         String decodedUml = plantUmlUtil.decodeUml(encodedUml)
37 |                 .replace("&", "&")
38 |                 .replace("<", "<")
39 |                 .replace(">", ">");
40 |         String editorUrl="../../";
41 |         try(InputStream content = this.getClass().getResourceAsStream(CONTENT_CLASSPATH);
42 |             BufferedReader br = new BufferedReader(new InputStreamReader(content))) {
43 |             StringBuffer sb = new StringBuffer();
44 |             Stream stream = br.lines();
45 |             stream.forEach(l -> sb.append(l.replace("{{uml_source}}", decodedUml)
46 |                     .replace("{{editor_url}}", editorUrl)));
47 |             sendHTMLResponse(outputStream, sb.toString(), String.valueOf(HttpStatus.SC_OK),
48 |                     getCacheHeaders(etag, DEFAULT_MAX_AGE));
49 |         } catch (StatusCodeException sce) {
50 |             sendExceptionResponse(outputStream, sce);
51 |         }
52 |     }
53 | }
54 | 


--------------------------------------------------------------------------------
/README.md:
--------------------------------------------------------------------------------
 1 | # Render PlantUML diagrams with AWS Lambda
 2 | 
 3 | A serverless UI + API to render [PlantUML](http://plantuml.com) diagrams.
 4 | 
 5 | ## Drop in replacement for official PlantUML server
 6 | 
 7 | This can be used as a drop in replacement for scenarios
 8 | where http://www.plantuml.com/plantuml is used as a rendering endpoint. You can avoid sending the diagram source to a server outside your control and use an encrypted HTTPS endpoint for the diagram traffic.
 9 | 
10 | This doesn't support everything the official PlantUML server does but should be good for most intents and purposes (PNG, SVG and TXT rendering).
11 | 
12 | For example, to have Visual Studio Code PlantUML plugin render using your own serverless deployment, set the following properties in vscode for the plugin: 
13 | 
14 | ```json
15 |     "plantuml.render": "PlantUMLServer",
16 |     "plantuml.server": "https://your-endpoint-here"
17 | ```
18 | 
19 | Use `"plantuml.server": "https://plantuml.nitorio.us"` if you'd like to try before you deploy your own.
20 | 
21 | ## Demo
22 | 
23 | ### PNG Diagram
24 | 
25 | ![Rendered PNG diagram should be here](https://plantuml.nitorio.us/png/Kt8goYylJYrIKj2rKr1o3F1KS4yiIIrFh5IoKWZ8ALOeIirBIIrIACd8B5Oeo4dCAodDpU52KGVMw9EOcvIIgE1McfTSafcVfwI0JpU6Of09C6czhCGYlDgnwBVHrSKq80YiEJL58IKpCRqeCHVDrM0zM9oDgGqUGc0jg464hXe0)
26 | 
27 | ### SVG Diagram 
28 | 
29 | ![Rendered SVG diagram should be here](https://plantuml.nitorio.us/svg/Kt8goYylJYrIKj2rKr1o3F1KS4yiIIrFh5IoKWZ8ALOeIirBIIrIACd8B5Oeo4dCAodDpU52KGVMw9EOcvIIgE1McfTSafcVfwI0JpU6Of09C6czhCGYlDgnwBVHrSKq80YiEJL58IKpCRqeCHVDrM0zM9oDgGqUGc0jg464hXe0)
30 | 
31 | ### TXT Diagram
32 | 
33 | https://plantuml.nitorio.us/txt/Kt8goYylJYrIKj2rKr1o3F1KS4yiIIrFh5IoKWZ8ALOeIirBIIrIACd8B5Oeo4dCAodDpU52KGVMw9EOcvIIgE1McfTSafcVfwI0JpU6Of09C6czhCGYlDgnwBVHrSKq80YiEJL58IKpCRqeCHVDrM0zM9oDgGqUGc0jg464hXe0
34 | 
35 | ## Build
36 | 
37 | - `npm ci`
38 | - `mvn clean package`
39 | 
40 | ## Deploy
41 | 
42 | You can deploy with Serverless framework or AWS SAM.
43 | 
44 | This used to be available on the AWS Serverless Application Repository, but currently that's not possible because it
45 | doesn't appear to support lambda functions packaged as container images.
46 | 
47 | ### Serverless framework:
48 | 
49 | - Edit `serverless.yml` to replace `custom.domains.dev` and `custom.domains.prod` with your own domain names.
50 |     * If you don't want a custom domain name, remove or comment out the `serverless-domain-manager` plugin from the plugins list and skip
51 |       the `sls create-cert` and `sls create_domain` commands.
52 | - Run `sls create-cert` to create an ACM certificate for your domain as configured in `custom.customCertificate`.
53 | - Run `sls create_domain` to create an API Gateway custom domain as configured in `custom.customDomain`.
54 | - Run `sls deploy`.
55 | 
56 | The above steps deploy the default `dev` stage. To deploy the `prod` stage, add `--stage prod` to each command.
57 | 
58 | ### AWS SAM
59 | 
60 | - Run `sam-deploy.sh`
61 | 
62 | The SAM deployment doesn't include custom domains currently.
63 | 


--------------------------------------------------------------------------------
/src/main/java/net/sourceforge/plantuml/servlet/utility/UmlExtractor.java:
--------------------------------------------------------------------------------
 1 | /* ========================================================================
 2 |  * PlantUML : a free UML diagram generator
 3 |  * ========================================================================
 4 |  *
 5 |  * Project Info:  http://plantuml.sourceforge.net
 6 |  *
 7 |  * This file is part of PlantUML.
 8 |  *
 9 |  * PlantUML is free software; you can redistribute it and/or modify it
10 |  * under the terms of the GNU General Public License as published by
11 |  * the Free Software Foundation, either version 3 of the License, or
12 |  * (at your option) any later version.
13 |  *
14 |  * PlantUML distributed in the hope that it will be useful, but
15 |  * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
16 |  * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
17 |  * License for more details.
18 |  *
19 |  * You should have received a copy of the GNU General Public
20 |  * License along with this library; if not, write to the Free Software
21 |  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301,
22 |  * USA.
23 |  */
24 | package net.sourceforge.plantuml.servlet.utility;
25 | 
26 | import java.io.IOException;
27 | import java.io.UnsupportedEncodingException;
28 | import java.net.URLDecoder;
29 | 
30 | import net.sourceforge.plantuml.code.Transcoder;
31 | import net.sourceforge.plantuml.code.TranscoderUtil;
32 | 
33 | /**
34 |  * Utility class to extract the UML source from the compressed UML source contained in the end part
35 |  * of the requested URI.
36 |  */
37 | public class UmlExtractor {
38 | 
39 |   /**
40 |    * Build the complete UML source from the compressed source extracted from the HTTP URI.
41 |    *
42 |    * @param source
43 |    *            the last part of the URI containing the compressed UML
44 |    * @return the textual UML source
45 |    */
46 |   static public String getUmlSource(String source) {
47 | 
48 |     // build the UML source from the compressed part of the URL
49 |     String text;
50 |     try {
51 |       text = URLDecoder.decode(source, "UTF-8");
52 |     } catch (UnsupportedEncodingException uee) {
53 |       text = "' invalid encoded string";
54 |     }
55 |     Transcoder transcoder = TranscoderUtil.getDefaultTranscoder();
56 |     try {
57 |       text = transcoder.decode(text);
58 |     } catch (IOException ioe) {
59 |       text = "' unable to decode string";
60 |     }
61 | 
62 |     // encapsulate the UML syntax if necessary
63 |     String uml;
64 |     if (text.startsWith("@start")) {
65 |       uml = text;
66 |     } else {
67 |       StringBuilder plantUmlSource = new StringBuilder();
68 |       plantUmlSource.append("@startuml\n");
69 |       plantUmlSource.append(text);
70 |       if (text.endsWith("\n") == false) {
71 |         plantUmlSource.append("\n");
72 |       }
73 |       plantUmlSource.append("@enduml");
74 |       uml = plantUmlSource.toString();
75 |     }
76 |     return uml;
77 |   }
78 | 
79 |   protected UmlExtractor() {
80 |     // prevents calls from subclass
81 |     throw new UnsupportedOperationException();
82 |   }
83 | 
84 | }


--------------------------------------------------------------------------------
/sam-deploy.sh:
--------------------------------------------------------------------------------
 1 | #!/bin/bash
 2 | # Note! This needs an ECR repo created like this:
 3 | # aws ecr create-repository --repository-name plantuml-sam \
 4 | # --image-tag-mutability IMMUTABLE --image-scanning-configuration scanOnPush=true
 5 | 
 6 | set -eo pipefail
 7 | readonly basedir="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
 8 | usage() {
 9 | cat >&2 < [ -s  ] [ -p  ] [ -p  ]
11 | Options
12 |   -b | --bucket       (Required) The S3 bucket to upload artifacts to.
13 |   -s | --stack-name   The name of the CloudFormation stack to create.
14 |                       (default: plantuml-sam)
15 |   -p | --profile      Specify an AWS profile
16 |   -r | --region       Specify an AWS region
17 |   -a | --account      Specify container image repository account id
18 |   -i | --image-repo)  Specify container image repository name
19 |                       (default: plantuml-sam)
20 |   -h | --help         Print this usage message and exit
21 | EOUSAGE
22 | }
23 | awsProfile=()
24 | rawRegion=""
25 | awsRegion=()
26 | s3bucket=""
27 | stackName="plantuml-sam"
28 | repoName="plantuml-sam"
29 | accountId=""
30 | while [[ $# -gt 0 ]]; do
31 |   opt="$1"
32 |   shift
33 |   case "$opt" in
34 |     -h|--help)        usage; exit;;
35 |     -p|--profile)     awsProfile=(--profile "$1"); shift;;
36 |     -r|--region)      rawRegion="$1"; awsRegion=(--region "$1"); shift;;
37 |     -b|--bucket)      s3bucket="$1"; shift;;
38 |     -s|--stack-name)  stackName="$1"; shift;;
39 |     -a|--account)     accountId="$1"; shift;;
40 |     -i|--image-repo)  repoName="$1"; shift;;
41 |     *)                echo "Unknown option $opt"; usage; exit 1;;
42 |   esac
43 | done
44 | 
45 | if [[ "$rawRegion" == "" ]]; then
46 |   rawRegion="$(aws ${awsProfile[*]} ec2 describe-availability-zones --output text --query 'AvailabilityZones[0].[RegionName]')"
47 |   awsRegion=(--region "$rawRegion")
48 | fi
49 | 
50 | if [[ "$accountId" == "" ]]; then
51 |   accountId="$(aws ${awsProfile[*]} sts get-caller-identity --query Account --output text)"
52 | fi
53 | 
54 | if [[ "$s3bucket" == "" ]]; then
55 |   echo "please provide an S3 bucket name with -b" >&2
56 |   exit 1
57 | fi
58 | 
59 | if [[ "$stackName" == "" ]]; then
60 |   echo "please provide a name for the CFN stack with -s" >&2
61 |   exit 1
62 | fi
63 | 
64 | pushd "${basedir}" 2>/dev/null
65 | codeUri="$(ls target/plantuml-serverless-*.jar | head -n 1)"
66 | if [[ ! -f "$codeUri" ]]; then
67 |   echo "missing plantuml-serverless-*.jar. please run 'mvn clean package'." >&2
68 |   exit 1
69 | fi
70 | 
71 | sam build --cached
72 | 
73 | # Edit the AWS account id and region in the repo URL here
74 | aws ecr get-login-password | docker login --username AWS \
75 | --password-stdin "${accountId}.dkr.ecr.${rawRegion}.amazonaws.com"
76 | 
77 | # Replace image-repository with your own
78 | sam deploy "${awsProfile[@]}" "${awsRegion[@]}" \
79 | --stack-name "${stackName}" \
80 | --capabilities CAPABILITY_IAM \
81 | --image-repository "${accountId}.dkr.ecr.${rawRegion}.amazonaws.com/${repoName}" \
82 | --s3-bucket "${s3bucket}"
83 | 
84 | #These would be for serverless application repository, but it doesn't support container based lambdas at the moment.
85 | #aws ${awsProfile[@]} s3 cp LICENSE s3://"${s3bucket}"/LICENSE
86 | #aws ${awsProfile[@]} s3 cp serverlessrepo/README.md s3://"${s3bucket}"/README.md
87 | 


--------------------------------------------------------------------------------
/serverless.yml:
--------------------------------------------------------------------------------
  1 | service: plantuml-serverless
  2 | 
  3 | frameworkVersion: ">=2.46.0 <3.0.0"
  4 | variablesResolutionMode: 20210326
  5 | 
  6 | provider:
  7 |   name: aws
  8 |   region: eu-west-1
  9 |   stage: dev
 10 |   timeout: 30
 11 |   logRetentionInDays: 30
 12 |   lambdaHashingVersion: 20201221
 13 |   environment:
 14 |     stage: ${self:custom.stage}
 15 |   ecr:
 16 |     scanOnPush: true
 17 |     images:
 18 |       lambdacontainer:
 19 |         path: ./
 20 |         file: lambdacontainer/Dockerfile
 21 | 
 22 | plugins:
 23 |   - serverless-certificate-creator
 24 |   - serverless-domain-manager
 25 | 
 26 | custom:
 27 |   stage: ${opt:stage, self:provider.stage}
 28 |   domains:
 29 |     prod: plantuml.nitorio.us
 30 |     dev: plantuml-dev.nitorio.us
 31 |   customCertificate:
 32 |     certificateName: ${self:custom.domains.${self:custom.stage}}
 33 |     idempotencyToken: "plantumlserverless"
 34 |     hostedZoneIds: "Z2N6543C2MYFH4"
 35 |     region: us-east-1 # us-east-1 required for edge type CloudFront endpoint
 36 |     # optional, default false. this is useful if you managed to delete your certificate but the dns validation records still exist
 37 |     rewriteRecords: true
 38 |   customDomain:
 39 |     domainName: ${self:custom.domains.${self:custom.stage}}
 40 |     certificateName: ${self:custom.domains.${self:custom.stage}}
 41 |     basePath: ''
 42 |     stage: "${self:custom.stage}"
 43 |     createRoute53Record: true
 44 |     endpointType: edge
 45 | 
 46 | functions:
 47 |   ui:
 48 |     events:
 49 |       - http:
 50 |           path: /
 51 |           method: get
 52 |           integration: lambda-proxy
 53 |           cors: true
 54 |     image:
 55 |       name: lambdacontainer
 56 |       command:
 57 |         - com.nitor.plantuml.lambda.UIHandler::handleRequest
 58 |   uml:
 59 |     events:
 60 |       - http:
 61 |           path: uml/{encodedUml}
 62 |           method: get
 63 |           integration: lambda-proxy
 64 |           cors: true
 65 |     image:
 66 |       name: lambdacontainer
 67 |       command:
 68 |         - com.nitor.plantuml.lambda.UmlHandler::handleRequest
 69 |   png:
 70 |     events:
 71 |       - http:
 72 |           path: png/{encodedUml}
 73 |           method: get
 74 |           integration: lambda-proxy
 75 |           cors: true
 76 |           response:
 77 |             contentHandling: CONVERT_TO_BINARY
 78 |     image:
 79 |       name: lambdacontainer
 80 |       command:
 81 |         - com.nitor.plantuml.lambda.PngHandler::handleRequest
 82 |   img:
 83 |     events:
 84 |       - http:
 85 |           path: img/{encodedUml}
 86 |           method: get
 87 |           integration: lambda-proxy
 88 |           cors: true
 89 |           response:
 90 |             contentHandling: CONVERT_TO_BINARY
 91 |     image:
 92 |       name: lambdacontainer
 93 |       command:
 94 |         - com.nitor.plantuml.lambda.PngHandler::handleRequest
 95 |   svg:
 96 |     events:
 97 |       - http:
 98 |           path: svg/{encodedUml}
 99 |           method: get
100 |           integration: lambda-proxy
101 |           cors: true
102 |     image:
103 |       name: lambdacontainer
104 |       command:
105 |         - com.nitor.plantuml.lambda.SvgHandler::handleRequest
106 |   txt:
107 |     events:
108 |       - http:
109 |           path: txt/{encodedUml}
110 |           method: get
111 |           integration: lambda-proxy
112 |           cors: true
113 |     image:
114 |       name: lambdacontainer
115 |       command:
116 |         - com.nitor.plantuml.lambda.TxtHandler::handleRequest
117 |   map:
118 |     events:
119 |       - http:
120 |           path: map/{encodedUml}
121 |           method: get
122 |           integration: lambda-proxy
123 |           cors: true
124 |           response:
125 |             contentHandling: CONVERT_TO_BINARY
126 |     image:
127 |       name: lambdacontainer
128 |       command:
129 |         - com.nitor.plantuml.lambda.MapHandler::handleRequest
130 |   check:
131 |     events:
132 |       - http:
133 |           path: check/{encodedUml}
134 |           method: get
135 |           integration: lambda-proxy
136 |           cors: true
137 |     image:
138 |       name: lambdacontainer
139 |       command:
140 |         - com.nitor.plantuml.lambda.SyntaxHandler::handleRequest
141 | 
142 | resources:
143 |   Description: PlantUML Serverless
144 | 


--------------------------------------------------------------------------------
/pom.xml:
--------------------------------------------------------------------------------
  1 | 
  3 |   4.0.0
  4 | 
  5 |   com.nitor
  6 |   plantuml-serverless
  7 |   jar
  8 |   static
  9 |   PlantUML Serverless API
 10 | 
 11 |   
 12 |     11
 13 |     11
 14 |     1.2021.16
 15 |   
 16 | 
 17 |   
 18 |     
 19 |       com.amazonaws
 20 |       aws-lambda-java-core
 21 |       1.2.1
 22 |     
 23 |     
 24 |       com.amazonaws
 25 |       aws-lambda-java-events
 26 |       3.11.0
 27 |     
 28 |     
 29 |       com.amazonaws
 30 |       aws-lambda-java-log4j
 31 |       1.0.1
 32 |     
 33 |     
 34 |     
 35 |       net.sourceforge.plantuml
 36 |       plantuml
 37 |       ${plantuml.version}
 38 |     
 39 |     
 40 |     
 41 |     	org.scilab.forge
 42 | 	    jlatexmath
 43 | 	    1.0.7
 44 |     
 45 |     
 46 |       org.apache.xmlgraphics
 47 |       batik-all
 48 |       1.14
 49 |     
 50 |     
 51 |     
 52 |       org.apache.cxf
 53 |       cxf-rt-frontend-jaxrs
 54 |       3.5.0
 55 |     
 56 |     
 57 |     
 58 |       com.googlecode.json-simple
 59 |       json-simple
 60 |       1.1.1
 61 |     
 62 |     
 63 |     
 64 |       com.google.code.gson
 65 |       gson
 66 |       2.8.9
 67 |     
 68 |     
 69 |     
 70 |       org.apache.httpcomponents
 71 |       httpcore
 72 |       4.4.15
 73 |     
 74 |   
 75 | 
 76 |   
 77 |     
 78 |       
 79 |         org.codehaus.mojo
 80 |         exec-maven-plugin
 81 |         3.0.0
 82 |         
 83 |           
 84 |             Minify UI
 85 |             
 86 |               exec
 87 |             
 88 |             process-resources
 89 |             
 90 |               node
 91 |               
 92 |                 ui/build/build.js
 93 |               
 94 |             
 95 |           
 96 |         
 97 |       
 98 |       
 99 |         org.apache.maven.plugins
100 |         maven-dependency-plugin
101 |         3.2.0
102 |         
103 |           
104 |             copy-dependencies
105 |             package
106 |             
107 |               copy-dependencies
108 |             
109 |             
110 |           
111 |         
112 |       
113 |     
114 |   
115 | 
116 | 
117 | 


--------------------------------------------------------------------------------
/src/main/java/com/nitor/plantuml/PlantUmlUtil.java:
--------------------------------------------------------------------------------
  1 | package com.nitor.plantuml;
  2 | 
  3 | import com.google.gson.Gson;
  4 | import com.google.gson.GsonBuilder;
  5 | import com.nitor.plantuml.lambda.DiagramType;
  6 | import com.nitor.plantuml.lambda.SyntaxCheckResult;
  7 | import com.nitor.plantuml.lambda.exception.BadRequestException;
  8 | import net.sourceforge.plantuml.FileFormat;
  9 | import net.sourceforge.plantuml.FileFormatOption;
 10 | import net.sourceforge.plantuml.LineLocation;
 11 | import net.sourceforge.plantuml.SourceStringReader;
 12 | import net.sourceforge.plantuml.code.AsciiEncoder;
 13 | import net.sourceforge.plantuml.servlet.utility.UmlExtractor;
 14 | import net.sourceforge.plantuml.syntax.SyntaxChecker;
 15 | import net.sourceforge.plantuml.syntax.SyntaxResult;
 16 | import net.sourceforge.plantuml.version.Version;
 17 | import org.apache.log4j.Logger;
 18 | 
 19 | import java.io.ByteArrayOutputStream;
 20 | import java.io.IOException;
 21 | import java.nio.charset.StandardCharsets;
 22 | import java.security.MessageDigest;
 23 | import java.util.ArrayList;
 24 | import java.util.Arrays;
 25 | import java.util.regex.Pattern;
 26 | 
 27 | public class PlantUmlUtil {
 28 | 
 29 |   private static final Logger logger = Logger.getLogger(PlantUmlUtil.class);
 30 |   public static final String DIAGRAM_TYPE_UNKNOWN = "UNKNOWN";
 31 |   public static final String NOETAG = "NOETAG";
 32 | 
 33 |   public SourceStringReader readDiagram(String encodedUml) {
 34 |     String uml = decodeUml(encodedUml);
 35 |     return new SourceStringReader(uml);
 36 |   }
 37 | 
 38 |   public String getEtag(String encodedUml, String typeIdentifier) {
 39 |     String uml = decodeUml(encodedUml);
 40 |     if (Pattern.compile("!include(_many|_once)?\\s*https?://").matcher(uml).find()) {
 41 |       return NOETAG;
 42 |     }
 43 |     String baseEtag = typeIdentifier + Version.etag();
 44 |     try {
 45 |       final AsciiEncoder coder = new AsciiEncoder();
 46 |       final MessageDigest msgDigest = MessageDigest.getInstance("MD5");
 47 |       msgDigest.update(uml.getBytes(StandardCharsets.UTF_8));
 48 |       final byte[] digest = msgDigest.digest();
 49 |       return baseEtag + coder.encode(digest);
 50 |     } catch (Exception e) {
 51 |       logger.error("failed to digest uml", e);
 52 |       return NOETAG;
 53 |     }
 54 |   }
 55 | 
 56 |   public ByteArrayOutputStream renderDiagram(SourceStringReader reader, DiagramType diagramType) throws IOException {
 57 |     ByteArrayOutputStream baos = new ByteArrayOutputStream();
 58 |     reader.outputImage(baos, new FileFormatOption(DiagramTypeUtil.asFileFormat(diagramType), true));
 59 |     return baos;
 60 |   }
 61 | 
 62 |   public String renderImageMap(SourceStringReader reader) throws IOException {
 63 |     ByteArrayOutputStream baos = new ByteArrayOutputStream();
 64 |     return reader.outputImage(baos, new FileFormatOption(FileFormat.PNG, true)).getDescription();
 65 |   }
 66 | 
 67 |   public SyntaxCheckResult checkSyntax(String encodedUml) throws IOException {
 68 |     String uml = decodeUml(encodedUml);
 69 |     SyntaxResult syntaxResult = SyntaxChecker.checkSyntax(uml);
 70 |     if (logger.isDebugEnabled()) {
 71 |       Gson gson = new GsonBuilder().create();
 72 |       String json = gson.toJson(syntaxResult);
 73 |       logger.debug(json);
 74 |     }
 75 |     String diagramType = syntaxResult.getUmlDiagramType() != null ? syntaxResult.getUmlDiagramType().name() : DIAGRAM_TYPE_UNKNOWN;
 76 |     LineLocation lineLoc = syntaxResult.getLineLocation();
 77 |     int lineLocationPos = -1;
 78 |     if (lineLoc != null) {
 79 |       lineLocationPos = lineLoc.getPosition();
 80 |     }
 81 |     SyntaxCheckResult result = new SyntaxCheckResult(syntaxResult.isError(), diagramType,
 82 |         String.valueOf(lineLocationPos), new ArrayList(syntaxResult.getErrors()));
 83 |     return result;
 84 |   }
 85 | 
 86 |   public String decodeUml(String encodedUml) {
 87 |     logger.debug(String.format("Got encoded uml: %s", encodedUml));
 88 |     try {
 89 |       if (encodedUml.length() > 10) {
 90 |           int period = encodedUml.indexOf('.');
 91 |           if (period > encodedUml.length() - 10) {
 92 |             encodedUml = encodedUml.substring(0, period);
 93 |           }
 94 |       }
 95 |       String decodedUml = UmlExtractor.getUmlSource(encodedUml);
 96 |       logger.debug(String.format("Decoded uml: %s", decodedUml));
 97 |       return decodedUml;
 98 |     } catch (IllegalArgumentException iae) {
 99 |       SyntaxCheckResult result = new SyntaxCheckResult(true, DIAGRAM_TYPE_UNKNOWN, "0",
100 |           Arrays.asList(String.format("Could not decode UML from request path: %s", encodedUml)));
101 |       Gson gson = new GsonBuilder().create();
102 |       String json = gson.toJson(result);
103 |       throw new BadRequestException(json, iae);
104 |     }
105 |   }
106 | 
107 | }
108 | 


--------------------------------------------------------------------------------
/ui/package-lock.json:
--------------------------------------------------------------------------------
  1 | {
  2 |   "name": "plantuml-previewer",
  3 |   "version": "1.0.0",
  4 |   "lockfileVersion": 1,
  5 |   "requires": true,
  6 |   "dependencies": {
  7 |     "camel-case": {
  8 |       "version": "3.0.0",
  9 |       "resolved": "https://registry.npmjs.org/camel-case/-/camel-case-3.0.0.tgz",
 10 |       "integrity": "sha1-yjw2iKTpzzpM2nd9xNy8cTJJz3M=",
 11 |       "dev": true,
 12 |       "requires": {
 13 |         "no-case": "^2.2.0",
 14 |         "upper-case": "^1.1.1"
 15 |       }
 16 |     },
 17 |     "clean-css": {
 18 |       "version": "4.1.11",
 19 |       "resolved": "https://registry.npmjs.org/clean-css/-/clean-css-4.1.11.tgz",
 20 |       "integrity": "sha1-Ls3xRaujj1R0DybO/Q/z4D4SXWo=",
 21 |       "dev": true,
 22 |       "requires": {
 23 |         "source-map": "0.5.x"
 24 |       }
 25 |     },
 26 |     "commander": {
 27 |       "version": "2.15.1",
 28 |       "resolved": "https://registry.npmjs.org/commander/-/commander-2.15.1.tgz",
 29 |       "integrity": "sha512-VlfT9F3V0v+jr4yxPc5gg9s62/fIVWsd2Bk2iD435um1NlGMYdVCq+MjcXnhYq2icNOizHr1kK+5TI6H0Hy0ag==",
 30 |       "dev": true
 31 |     },
 32 |     "he": {
 33 |       "version": "1.1.1",
 34 |       "resolved": "https://registry.npmjs.org/he/-/he-1.1.1.tgz",
 35 |       "integrity": "sha1-k0EP0hsAlzUVH4howvJx80J+I/0=",
 36 |       "dev": true
 37 |     },
 38 |     "html-minifier": {
 39 |       "version": "3.5.12",
 40 |       "resolved": "https://registry.npmjs.org/html-minifier/-/html-minifier-3.5.12.tgz",
 41 |       "integrity": "sha512-+N778qLf0RWBscD0TPGoYdeGNDZ0s76/0pQhY1/409EOudcENkm9IbSkk37RDyPdg/09GVHTKotU4ya93RF1Gg==",
 42 |       "dev": true,
 43 |       "requires": {
 44 |         "camel-case": "3.0.x",
 45 |         "clean-css": "4.1.x",
 46 |         "commander": "2.15.x",
 47 |         "he": "1.1.x",
 48 |         "ncname": "1.0.x",
 49 |         "param-case": "2.1.x",
 50 |         "relateurl": "0.2.x",
 51 |         "uglify-js": "3.3.x"
 52 |       }
 53 |     },
 54 |     "lower-case": {
 55 |       "version": "1.1.4",
 56 |       "resolved": "https://registry.npmjs.org/lower-case/-/lower-case-1.1.4.tgz",
 57 |       "integrity": "sha1-miyr0bno4K6ZOkv31YdcOcQujqw=",
 58 |       "dev": true
 59 |     },
 60 |     "ncname": {
 61 |       "version": "1.0.0",
 62 |       "resolved": "https://registry.npmjs.org/ncname/-/ncname-1.0.0.tgz",
 63 |       "integrity": "sha1-W1etGLHKCShk72Kwse2BlPODtxw=",
 64 |       "dev": true,
 65 |       "requires": {
 66 |         "xml-char-classes": "^1.0.0"
 67 |       }
 68 |     },
 69 |     "no-case": {
 70 |       "version": "2.3.2",
 71 |       "resolved": "https://registry.npmjs.org/no-case/-/no-case-2.3.2.tgz",
 72 |       "integrity": "sha512-rmTZ9kz+f3rCvK2TD1Ue/oZlns7OGoIWP4fc3llxxRXlOkHKoWPPWJOfFYpITabSow43QJbRIoHQXtt10VldyQ==",
 73 |       "dev": true,
 74 |       "requires": {
 75 |         "lower-case": "^1.1.1"
 76 |       }
 77 |     },
 78 |     "param-case": {
 79 |       "version": "2.1.1",
 80 |       "resolved": "https://registry.npmjs.org/param-case/-/param-case-2.1.1.tgz",
 81 |       "integrity": "sha1-35T9jPZTHs915r75oIWPvHK+Ikc=",
 82 |       "dev": true,
 83 |       "requires": {
 84 |         "no-case": "^2.2.0"
 85 |       }
 86 |     },
 87 |     "relateurl": {
 88 |       "version": "0.2.7",
 89 |       "resolved": "https://registry.npmjs.org/relateurl/-/relateurl-0.2.7.tgz",
 90 |       "integrity": "sha1-VNvzd+UUQKypCkzSdGANP/LYiKk=",
 91 |       "dev": true
 92 |     },
 93 |     "source-map": {
 94 |       "version": "0.5.7",
 95 |       "resolved": "https://registry.npmjs.org/source-map/-/source-map-0.5.7.tgz",
 96 |       "integrity": "sha1-igOdLRAh0i0eoUyA2OpGi6LvP8w=",
 97 |       "dev": true
 98 |     },
 99 |     "uglify-js": {
100 |       "version": "3.3.16",
101 |       "resolved": "https://registry.npmjs.org/uglify-js/-/uglify-js-3.3.16.tgz",
102 |       "integrity": "sha512-FMh5SRqJRGhv9BbaTffENIpDDQIoPDR8DBraunGORGhySArsXlw9++CN+BWzPBLpoI4RcSnpfGPnilTxWL3Vvg==",
103 |       "dev": true,
104 |       "requires": {
105 |         "commander": "~2.15.0",
106 |         "source-map": "~0.6.1"
107 |       },
108 |       "dependencies": {
109 |         "source-map": {
110 |           "version": "0.6.1",
111 |           "resolved": "https://registry.npmjs.org/source-map/-/source-map-0.6.1.tgz",
112 |           "integrity": "sha512-UjgapumWlbMhkBgzT7Ykc5YXUT46F0iKu8SGXq0bcwP5dz/h0Plj6enJqjz1Zbq2l5WaqYnrVbwWOWMyF3F47g==",
113 |           "dev": true
114 |         }
115 |       }
116 |     },
117 |     "upper-case": {
118 |       "version": "1.1.3",
119 |       "resolved": "https://registry.npmjs.org/upper-case/-/upper-case-1.1.3.tgz",
120 |       "integrity": "sha1-9rRQHC7EzdJrp4vnIilh3ndiFZg=",
121 |       "dev": true
122 |     },
123 |     "xml-char-classes": {
124 |       "version": "1.0.0",
125 |       "resolved": "https://registry.npmjs.org/xml-char-classes/-/xml-char-classes-1.0.0.tgz",
126 |       "integrity": "sha1-ZGV4SKIP/F31g6Qq2KJ3tFErvE0=",
127 |       "dev": true
128 |     }
129 |   }
130 | }
131 | 


--------------------------------------------------------------------------------
/src/main/java/com/nitor/plantuml/lambda/PngHandler.java:
--------------------------------------------------------------------------------
  1 | package com.nitor.plantuml.lambda;
  2 | 
  3 | import com.amazonaws.services.lambda.runtime.Context;
  4 | import com.amazonaws.services.lambda.runtime.RequestStreamHandler;
  5 | import com.nitor.plantuml.PlantUmlUtil;
  6 | import com.nitor.plantuml.lambda.exception.StatusCodeException;
  7 | import net.sourceforge.plantuml.SourceStringReader;
  8 | import org.apache.http.HttpStatus;
  9 | import org.apache.log4j.Logger;
 10 | import org.json.simple.JSONObject;
 11 | 
 12 | import java.io.ByteArrayOutputStream;
 13 | import java.io.IOException;
 14 | import java.io.InputStream;
 15 | import java.io.OutputStream;
 16 | import java.nio.file.Files;
 17 | import java.nio.file.Path;
 18 | import java.nio.file.Paths;
 19 | import java.nio.file.attribute.PosixFilePermission;
 20 | import java.nio.file.attribute.PosixFilePermissions;
 21 | import java.util.Base64;
 22 | import java.util.Collections;
 23 | import java.util.Set;
 24 | import java.util.concurrent.TimeUnit;
 25 | 
 26 | public class PngHandler extends LambdaBase implements RequestStreamHandler {
 27 |     private static final Logger logger = Logger.getLogger(PngHandler.class);
 28 |     private static final String TYPE_IDENTIFIER = "png";
 29 |     private final PlantUmlUtil plantUmlUtil = new PlantUmlUtil();
 30 | 
 31 |     @Override
 32 |     public void handleRequest(InputStream inputStream, OutputStream outputStream, Context context) throws IOException {
 33 |         JSONObject event = parseEvent(inputStream);
 34 |         String encodedUml = getEncodedUml(event);
 35 |         final String etag = plantUmlUtil.getEtag(encodedUml, TYPE_IDENTIFIER);
 36 |         if (isMatchingEtag(event, etag)) {
 37 |             send304Response(outputStream, Collections.emptyMap());
 38 |             return;
 39 |         }
 40 | 
 41 |         try {
 42 |             SourceStringReader reader = plantUmlUtil.readDiagram(encodedUml);
 43 |             ByteArrayOutputStream baos = plantUmlUtil.renderDiagram(reader, DiagramType.IMAGE_PNG);
 44 |             if (isNitorStyle(event)) {
 45 |                 baos = applyBackground(baos);
 46 |             }
 47 |             byte[] bytes = baos.toByteArray();
 48 |             String base64Response = Base64.getEncoder().encodeToString(bytes);
 49 |             SyntaxCheckResult syntaxCheckResult = plantUmlUtil.checkSyntax(encodedUml);
 50 |             if (!syntaxCheckResult.isError()) {
 51 |                 sendOKDiagramResponse(outputStream, base64Response, DiagramType.IMAGE_PNG,
 52 |                         getCacheHeaders(etag, DEFAULT_MAX_AGE));
 53 |             } else {
 54 |                 sendDiagramResponse(outputStream, base64Response, DiagramType.IMAGE_PNG,
 55 |                         String.valueOf(HttpStatus.SC_UNPROCESSABLE_ENTITY));
 56 |             }
 57 |         } catch (StatusCodeException sce) {
 58 |             sendExceptionResponse(outputStream, sce);
 59 |         }
 60 |     }
 61 | 
 62 |     private ByteArrayOutputStream applyBackground(ByteArrayOutputStream diagramImage) {
 63 |         byte[] originalDiagramBytes = diagramImage.toByteArray();
 64 |         try {
 65 |             if (!Files.exists(Paths.get(System.getenv(LAMBDA_TASK_ROOT), "bg.png"))) {
 66 |                 logger.error("Background image not found!");
 67 |                 return bytesToByteArrayOutputStream(originalDiagramBytes);
 68 |             }
 69 |             Path pathToTmp = Paths.get("/tmp");
 70 |             Set perms = PosixFilePermissions.fromString("rwx------");
 71 |             Path diagramImageFile = Files.createTempFile(pathToTmp, null, null);
 72 |             Files.write(diagramImageFile, originalDiagramBytes);
 73 |             Path diagramWithBackgroundFile = Files.createTempFile(Paths.get("/tmp"), null, null);
 74 |             Path tempBackgroundFile = Files.createTempFile(Paths.get("/tmp"), null, null);
 75 |             Path bgFile = Paths.get(System.getenv(LAMBDA_TASK_ROOT), "bg.png");
 76 |             Path script = Paths.get(System.getenv(LAMBDA_TASK_ROOT), "bg.sh");
 77 | 
 78 |             Process p = new ProcessBuilder("/bin/sh", "-x", script.toString(), diagramImageFile.toString(),
 79 |                     bgFile.toString(), tempBackgroundFile.toString(), diagramWithBackgroundFile.toString())
 80 |                     .redirectOutput(ProcessBuilder.Redirect.INHERIT)
 81 |                     .redirectError(ProcessBuilder.Redirect.INHERIT)
 82 |                     .start();
 83 |             p.waitFor(5, TimeUnit.SECONDS);
 84 |             if (p.exitValue() == 0) {
 85 |                 ByteArrayOutputStream baos = new ByteArrayOutputStream();
 86 |                 baos.write(Files.readAllBytes(diagramWithBackgroundFile));
 87 |                 return baos;
 88 |             }
 89 |         } catch (IOException e) {
 90 |             e.printStackTrace();
 91 |         } catch (InterruptedException e) {
 92 |             e.printStackTrace();
 93 |         }
 94 | 
 95 |         logger.error(String.format("Problem with background apply"));
 96 | 
 97 |         return bytesToByteArrayOutputStream(originalDiagramBytes);
 98 |     }
 99 | 
100 |     private ByteArrayOutputStream bytesToByteArrayOutputStream(byte[] bytes) {
101 |         ByteArrayOutputStream originalImageData = new ByteArrayOutputStream();
102 |         try {
103 |             originalImageData.write(bytes);
104 |         } catch (IOException e) {
105 |             e.printStackTrace();
106 |         }
107 |         return originalImageData;
108 |     }
109 | 
110 | }


--------------------------------------------------------------------------------
/template.yml:
--------------------------------------------------------------------------------
  1 | AWSTemplateFormatVersion: '2010-09-09'
  2 | Transform: AWS::Serverless-2016-10-31
  3 | Description: PlantUML Serverless API
  4 | 
  5 | Globals:
  6 |   Function:
  7 |     Timeout: 30
  8 |     MemorySize: 512
  9 | 
 10 | Metadata:
 11 |   AWS::ServerlessRepo::Application:
 12 |     Name: plantuml-render
 13 |     Description: PlantUML Serverless API and UI
 14 |     Author: mmajis
 15 |     SpdxLicenseId: GPL-3.0-only
 16 |     LicenseUrl: s3://plantuml-serverlessrepo/LICENSE
 17 |     ReadmeUrl: s3://plantuml-serverlessrepo/README.md
 18 |     Labels: ['plantuml']
 19 |     HomePageUrl: https://github.com/mmajis/plantuml-serverless
 20 |     SemanticVersion: 0.1.1
 21 |     SourceCodeUrl: https://github.com/mmajis/plantuml-serverless/releases/tag/v0.1.1
 22 | 
 23 | Resources:
 24 |   PlantUMLAPI:
 25 |     Type: AWS::Serverless::Api
 26 |     Properties:
 27 |       StageName: plantuml
 28 |       DefinitionBody:
 29 |           swagger: 2.0
 30 |           info:
 31 |             title:
 32 |               Ref: AWS::StackName
 33 |           paths:
 34 |             "/":
 35 |               get: 
 36 |                 x-amazon-apigateway-integration:
 37 |                   responses:
 38 |                     default:
 39 |                       statusCode: 200
 40 |                   uri:
 41 |                     Fn::Sub: "arn:aws:apigateway:${AWS::Region}:lambda:path/2015-03-31/functions/${UIFunction.Arn}/invocations"
 42 |                   httpMethod: POST
 43 |                   type: aws_proxy
 44 |             "/uml/{encodedUml}":
 45 |               get:
 46 |                 x-amazon-apigateway-integration:
 47 |                   responses:
 48 |                     default:
 49 |                       statusCode: 200
 50 |                   uri:
 51 |                     Fn::Sub: "arn:aws:apigateway:${AWS::Region}:lambda:path/2015-03-31/functions/${UmlFunction.Arn}/invocations"
 52 |                   httpMethod: POST
 53 |                   type: aws_proxy
 54 |             "/png/{encodedUml}":
 55 |               get:
 56 |                 x-amazon-apigateway-integration:
 57 |                   responses:
 58 |                     default:
 59 |                       statusCode: 200
 60 |                   uri:
 61 |                     Fn::Sub: "arn:aws:apigateway:${AWS::Region}:lambda:path/2015-03-31/functions/${PngFunction.Arn}/invocations"
 62 |                   httpMethod: POST
 63 |                   type: aws_proxy
 64 |                   contentHandling: CONVERT_TO_BINARY
 65 |             "/img/{encodedUml}":
 66 |               get:
 67 |                 x-amazon-apigateway-integration:
 68 |                   responses:
 69 |                     default:
 70 |                       statusCode: 200
 71 |                   uri:
 72 |                     Fn::Sub: "arn:aws:apigateway:${AWS::Region}:lambda:path/2015-03-31/functions/${ImgFunction.Arn}/invocations"
 73 |                   httpMethod: POST
 74 |                   type: aws_proxy
 75 |                   contentHandling: CONVERT_TO_BINARY
 76 |             "/svg/{encodedUml}":
 77 |               get:
 78 |                 x-amazon-apigateway-integration:
 79 |                   responses:
 80 |                     default:
 81 |                       statusCode: 200
 82 |                   uri:
 83 |                     Fn::Sub: "arn:aws:apigateway:${AWS::Region}:lambda:path/2015-03-31/functions/${SvgFunction.Arn}/invocations"
 84 |                   httpMethod: POST
 85 |                   type: aws_proxy
 86 |                   contentHandling: CONVERT_TO_BINARY
 87 |             "/txt/{encodedUml}":
 88 |               get:
 89 |                 x-amazon-apigateway-integration:
 90 |                   responses:
 91 |                     default:
 92 |                       statusCode: 200
 93 |                   uri:
 94 |                     Fn::Sub: "arn:aws:apigateway:${AWS::Region}:lambda:path/2015-03-31/functions/${TxtFunction.Arn}/invocations"
 95 |                   httpMethod: POST
 96 |                   type: aws_proxy
 97 |                   contentHandling: CONVERT_TO_BINARY
 98 |             "/map/{encodedUml}":
 99 |               get:
100 |                 x-amazon-apigateway-integration:
101 |                   responses:
102 |                     default:
103 |                       statusCode: 200
104 |                   uri:
105 |                     Fn::Sub: "arn:aws:apigateway:${AWS::Region}:lambda:path/2015-03-31/functions/${MapFunction.Arn}/invocations"
106 |                   httpMethod: POST
107 |                   type: aws_proxy
108 |                   contentHandling: CONVERT_TO_BINARY
109 |             "/check/{encodedUml}":
110 |               get:
111 |                 x-amazon-apigateway-integration:
112 |                   responses:
113 |                     default:
114 |                       statusCode: 200
115 |                   uri:
116 |                     Fn::Sub: "arn:aws:apigateway:${AWS::Region}:lambda:path/2015-03-31/functions/${SyntaxFunction.Arn}/invocations"
117 |                   httpMethod: POST
118 |                   type: aws_proxy
119 |                   contentHandling: CONVERT_TO_BINARY
120 |           x-amazon-apigateway-binary-media-types:
121 |             - "*/*"
122 |   UIFunction:
123 |     Type: AWS::Serverless::Function
124 |     Properties:
125 |       Timeout: 30
126 |       PackageType: Image
127 |       ImageConfig:
128 |         Command: [ "com.nitor.plantuml.lambda.UIHandler::handleRequest" ]
129 |       Events:
130 |         GetResource:
131 |           Type: Api
132 |           Properties:
133 |             Path: /
134 |             Method: get
135 |             RestApiId: !Ref PlantUMLAPI
136 |     Metadata:
137 |       DockerTag: lambdacontainer-sam
138 |       DockerContext: ./
139 |       Dockerfile: lambdacontainer/Dockerfile
140 | 
141 |   UmlFunction:
142 |     Type: AWS::Serverless::Function
143 |     Properties:
144 |       Timeout: 30
145 |       PackageType: Image
146 |       ImageConfig:
147 |         Command: [ "com.nitor.plantuml.lambda.UmlHandler::handleRequest" ]
148 |       Events:
149 |         GetResource:
150 |           Type: Api
151 |           Properties:
152 |             Path: /uml/{encodedUml}
153 |             Method: get
154 |             RestApiId: !Ref PlantUMLAPI
155 |     Metadata:
156 |       DockerTag: lambdacontainer-sam
157 |       DockerContext: ./
158 |       Dockerfile: lambdacontainer/Dockerfile
159 | 
160 |   PngFunction:
161 |     Type: AWS::Serverless::Function
162 |     Properties:
163 |       Timeout: 30
164 |       PackageType: Image
165 |       ImageConfig:
166 |         Command: [ "com.nitor.plantuml.lambda.PngHandler::handleRequest" ]
167 |       Events:
168 |         GetResource:
169 |           Type: Api
170 |           Properties:
171 |             Path: /png/{encodedUml}
172 |             Method: get
173 |             RestApiId: !Ref PlantUMLAPI
174 |     Metadata:
175 |       DockerTag: lambdacontainer-sam
176 |       DockerContext: ./
177 |       Dockerfile: lambdacontainer/Dockerfile
178 | 
179 |   ImgFunction:
180 |     Type: AWS::Serverless::Function
181 |     Properties:
182 |       Timeout: 30
183 |       PackageType: Image
184 |       ImageConfig:
185 |         Command: [ "com.nitor.plantuml.lambda.PngHandler::handleRequest" ]
186 |       Events:
187 |         GetResource:
188 |           Type: Api
189 |           Properties:
190 |             Path: /img/{encodedUml}
191 |             Method: get
192 |             RestApiId: !Ref PlantUMLAPI
193 |     Metadata:
194 |       DockerTag: lambdacontainer-sam
195 |       DockerContext: ./
196 |       Dockerfile: lambdacontainer/Dockerfile
197 | 
198 |   SvgFunction:
199 |     Type: AWS::Serverless::Function
200 |     Properties:
201 |       Timeout: 30
202 |       PackageType: Image
203 |       ImageConfig:
204 |         Command: [ "com.nitor.plantuml.lambda.SvgHandler::handleRequest" ]
205 |       Events:
206 |         GetResource:
207 |           Type: Api
208 |           Properties:
209 |             Path: /svg/{encodedUml}
210 |             Method: get
211 |             RestApiId: !Ref PlantUMLAPI
212 |     Metadata:
213 |       DockerTag: lambdacontainer-sam
214 |       DockerContext: ./
215 |       Dockerfile: lambdacontainer/Dockerfile
216 | 
217 |   TxtFunction:
218 |     Type: AWS::Serverless::Function
219 |     Properties:
220 |       Timeout: 30
221 |       PackageType: Image
222 |       ImageConfig:
223 |         Command: [ "com.nitor.plantuml.lambda.TxtHandler::handleRequest" ]
224 |       Events:
225 |         GetResource:
226 |           Type: Api
227 |           Properties:
228 |             Path: /txt/{encodedUml}
229 |             Method: get
230 |             RestApiId: !Ref PlantUMLAPI
231 |     Metadata:
232 |       DockerTag: lambdacontainer-sam
233 |       DockerContext: ./
234 |       Dockerfile: lambdacontainer/Dockerfile
235 |             
236 |   MapFunction:
237 |     Type: AWS::Serverless::Function
238 |     Properties:
239 |       Timeout: 30
240 |       PackageType: Image
241 |       ImageConfig:
242 |         Command: [ "com.nitor.plantuml.lambda.MapHandler::handleRequest" ]
243 |       Events:
244 |         GetResource:
245 |           Type: Api
246 |           Properties:
247 |             Path: /map/{encodedUml}
248 |             Method: get
249 |             RestApiId: !Ref PlantUMLAPI
250 |     Metadata:
251 |       DockerTag: lambdacontainer-sam
252 |       DockerContext: ./
253 |       Dockerfile: lambdacontainer/Dockerfile
254 | 
255 |   SyntaxFunction:
256 |     Type: AWS::Serverless::Function
257 |     Properties:
258 |       Timeout: 30
259 |       PackageType: Image
260 |       ImageConfig:
261 |         Command: [ "com.nitor.plantuml.lambda.SyntaxHandler::handleRequest" ]
262 |       Events:
263 |         GetResource:
264 |           Type: Api
265 |           Properties:
266 |             Path: /check/{encodedUml}
267 |             Method: get
268 |             RestApiId: !Ref PlantUMLAPI
269 |     Metadata:
270 |       DockerTag: lambdacontainer-sam
271 |       DockerContext: ./
272 |       Dockerfile: lambdacontainer/Dockerfile
273 | 
274 | Outputs:
275 |   ApiUrl:
276 |     Description: URL of your API endpoint
277 |     Value: !Sub "https://${PlantUMLAPI}.execute-api.${AWS::Region}.amazonaws.com/plantuml"
278 |   ExampleDiagram:
279 |     Description: Example URL to render a PlantUML diagram
280 |     Value: !Sub "https://${PlantUMLAPI}.execute-api.${AWS::Region}.amazonaws.com/plantuml/png/SyfFKj2rKt3CoKnELR1Io4ZDoSa70000"
281 | 


--------------------------------------------------------------------------------
/src/main/java/com/nitor/plantuml/lambda/LambdaBase.java:
--------------------------------------------------------------------------------
  1 | package com.nitor.plantuml.lambda;
  2 | 
  3 | import com.nitor.plantuml.PlantUmlUtil;
  4 | import com.nitor.plantuml.lambda.exception.StatusCodeException;
  5 | import org.apache.http.HttpStatus;
  6 | import org.apache.log4j.LogManager;
  7 | import org.apache.log4j.Logger;
  8 | import org.apache.log4j.PropertyConfigurator;
  9 | import org.json.simple.JSONObject;
 10 | import org.json.simple.parser.JSONParser;
 11 | 
 12 | import java.awt.*;
 13 | import java.io.BufferedReader;
 14 | import java.io.File;
 15 | import java.io.IOException;
 16 | import java.io.InputStream;
 17 | import java.io.InputStreamReader;
 18 | import java.io.OutputStream;
 19 | import java.io.OutputStreamWriter;
 20 | import java.net.URL;
 21 | import java.nio.file.FileSystems;
 22 | import java.nio.file.Files;
 23 | import java.nio.file.StandardCopyOption;
 24 | import java.nio.file.attribute.PosixFilePermissions;
 25 | import java.util.Base64;
 26 | import java.util.Collections;
 27 | import java.util.HashMap;
 28 | import java.util.Map;
 29 | import java.util.Optional;
 30 | import java.util.Properties;
 31 | 
 32 | import static com.nitor.plantuml.PlantUmlUtil.NOETAG;
 33 | 
 34 | class LambdaBase {
 35 | 
 36 |     private static final String ENV_VAR_KEY_STAGE = "stage";
 37 |     private static final String DEFAULT_STAGE = "dev";
 38 |     private static final String GRAPHVIZ_DOT = "GRAPHVIZ_DOT";
 39 |     static final String LAMBDA_TASK_ROOT = "LAMBDA_TASK_ROOT";
 40 |     private static final String DOT_PATH = "/opt/dot_static";
 41 |     static final long DEFAULT_MAX_AGE = 3600;
 42 | 
 43 |     private static final Logger logger = Logger.getLogger(LambdaBase.class);
 44 | 
 45 |     static {
 46 |         String stage = Optional.ofNullable(System.getenv(ENV_VAR_KEY_STAGE)).orElse(DEFAULT_STAGE);
 47 |         URL logPropsUrl = LambdaBase.class.getResource(String.format("/log4j-%s.properties", stage));
 48 |         if (logPropsUrl != null) {
 49 |             LogManager.resetConfiguration();
 50 |             PropertyConfigurator.configure(logPropsUrl);
 51 |         }
 52 | 
 53 |         if (System.getenv(LAMBDA_TASK_ROOT) == null) {
 54 |             logger.error(String.format("%s environment variable is not set. Rendering without graphviz dot!", LAMBDA_TASK_ROOT));
 55 |         } else {
 56 |             System.setProperty(GRAPHVIZ_DOT, DOT_PATH);
 57 |         }
 58 |         logger.debug(String.format("GRAPHVIZ_DOT system property: %s", System.getProperty(GRAPHVIZ_DOT)));
 59 |     }
 60 | 
 61 |     Map getCacheHeaders(String etag, long maxAge) {
 62 |         if (NOETAG.equals(etag)) {
 63 |             return Collections.emptyMap();
 64 |         } else {
 65 |             Map headers = new HashMap<>();
 66 |             headers.put("ETag", etag);
 67 |             headers.put("Cache-Control", "public, max-age=" + maxAge);
 68 |             return headers;
 69 |         }
 70 |     }
 71 | 
 72 |     boolean isMatchingEtag(JSONObject event, String expectedEtag) {
 73 |         logger.debug(String.format("expected etag %s -> event: %s", expectedEtag, event.toJSONString()));
 74 |         return expectedEtag != null && !NOETAG.equals(expectedEtag) && getJSONObject(event, "headers")
 75 |                 .entrySet().stream().anyMatch(pair ->
 76 |                         "if-none-match".equalsIgnoreCase(pair.getKey()) && expectedEtag.equals(pair.getValue()));
 77 |     }
 78 | 
 79 |     @SuppressWarnings("unchecked")
 80 |     void send304Response(OutputStream outputStream, Map headers) throws IOException {
 81 |         JSONObject responseJson = new JSONObject();
 82 | 
 83 |         JSONObject headerJson = new JSONObject();
 84 |         headerJson.putAll(headers);
 85 |         headerJson.put("Access-Control-Allow-Origin", "*");
 86 | 
 87 |         responseJson.put("statusCode", "304");
 88 |         responseJson.put("headers", headerJson);
 89 | 
 90 |         internalSendResponse(outputStream, responseJson);
 91 |     }
 92 | 
 93 |     void sendOKDiagramResponse(OutputStream outputStream, String base64Response, DiagramType diagramType) throws IOException {
 94 |         sendOKDiagramResponse(outputStream, base64Response, diagramType, Collections.emptyMap());
 95 |     }
 96 | 
 97 |     void sendOKDiagramResponse(OutputStream outputStream, String base64Response,
 98 |                                DiagramType diagramType, Map headers) throws IOException {
 99 |         sendDiagramResponse(outputStream, base64Response, diagramType, String.valueOf(HttpStatus.SC_OK), headers);
100 |     }
101 | 
102 |     void sendDiagramResponse(OutputStream outputStream, String base64Response, DiagramType diagramType,
103 |                              String statusCode) throws IOException {
104 |         sendDiagramResponse(outputStream, base64Response, diagramType, statusCode, Collections.emptyMap());
105 |     }
106 | 
107 |     @SuppressWarnings("unchecked")
108 |     void sendDiagramResponse(OutputStream outputStream, String base64Response, DiagramType diagramType,
109 |                              String statusCode, Map headers) throws IOException {
110 |         JSONObject responseJson = new JSONObject();
111 | 
112 |         JSONObject headerJson = new JSONObject();
113 |         headerJson.putAll(headers);
114 |         headerJson.put("Access-Control-Allow-Origin", "*");
115 |         headerJson.put("Content-Type", diagramType.getMimeType());
116 | 
117 |         responseJson.put("statusCode", statusCode);
118 |         responseJson.put("headers", headerJson);
119 |         responseJson.put("body", base64Response);
120 |         responseJson.put("isBase64Encoded", true);
121 | 
122 |         internalSendResponse(outputStream, responseJson);
123 |     }
124 | 
125 |     void sendOKJSONResponse(OutputStream outputStream, String base64Response) throws IOException {
126 |         sendOKJSONResponse(outputStream, base64Response, Collections.emptyMap());
127 |     }
128 | 
129 |     @SuppressWarnings("unchecked")
130 |     void sendOKJSONResponse(OutputStream outputStream, String base64Response, Map headers) throws IOException {
131 |         sendJSONResponse(outputStream, base64Response, String.valueOf(HttpStatus.SC_OK), headers);
132 |     }
133 | 
134 |     void sendExceptionResponse(OutputStream outputStream, StatusCodeException statusCodeException) throws IOException {
135 |         sendExceptionResponse(outputStream, statusCodeException, Collections.emptyMap());
136 |     }
137 | 
138 |     void sendExceptionResponse(OutputStream outputStream, StatusCodeException statusCodeException,
139 |                                Map headers) throws IOException {
140 |         String base64Response = Base64.getEncoder().encodeToString(statusCodeException.getMessage().getBytes());
141 |         sendJSONResponse(outputStream, base64Response, statusCodeException.getStatusCode(), headers);
142 |     }
143 | 
144 |     void sendJSONResponse(OutputStream outputStream, String base64Response, String statusCode) throws IOException {
145 |         sendJSONResponse(outputStream, base64Response, statusCode, Collections.emptyMap());
146 |     }
147 | 
148 |     void sendJSONResponse(OutputStream outputStream, String base64Response,
149 |                           String statusCode, Map headers) throws IOException {
150 |         JSONObject responseJson = new JSONObject();
151 | 
152 |         JSONObject headerJson = new JSONObject();
153 |         headerJson.putAll(headers);
154 |         headerJson.put("Access-Control-Allow-Origin", "*");
155 |         headerJson.put("Content-Type", "application/json");
156 | 
157 |         responseJson.put("statusCode", statusCode);
158 |         responseJson.put("headers", headerJson);
159 |         responseJson.put("body", base64Response);
160 |         responseJson.put("isBase64Encoded", true);
161 | 
162 |         internalSendResponse(outputStream, responseJson);
163 |     }
164 | 
165 |     void sendHTMLResponse(OutputStream outputStream, String htmlResponse, String statusCode) throws IOException {
166 |         sendHTMLResponse(outputStream, htmlResponse, statusCode, Collections.emptyMap());
167 |     }
168 | 
169 |     void sendHTMLResponse(OutputStream outputStream, String htmlResponse,
170 |                           String statusCode, Map headers) throws IOException {
171 |         JSONObject responseJson = new JSONObject();
172 | 
173 |         JSONObject headerJson = new JSONObject();
174 |         headerJson.putAll(headers);
175 |         headerJson.put("Access-Control-Allow-Origin", "*");
176 |         headerJson.put("Content-Type", "text/html");
177 | 
178 |         responseJson.put("statusCode", statusCode);
179 |         responseJson.put("headers", headerJson);
180 |         responseJson.put("body", htmlResponse);
181 |         responseJson.put("isBase64Encoded", false);
182 | 
183 |         internalSendResponse(outputStream, responseJson);
184 |     }
185 | 
186 |     void sendRedirectResponse(OutputStream outputStream, String redirectPath) throws IOException {
187 |         sendRedirectResponse(outputStream, redirectPath, Collections.emptyMap());
188 |     }
189 | 
190 |     void sendRedirectResponse(OutputStream outputStream, String redirectPath,
191 |                               Map headers) throws IOException {
192 |         JSONObject responseJson = new JSONObject();
193 | 
194 |         JSONObject headerJson = new JSONObject();
195 |         headerJson.putAll(headers);
196 |         headerJson.put("Access-Control-Allow-Origin", "*");
197 |         headerJson.put("Location", redirectPath);
198 | 
199 |         responseJson.put("statusCode", HttpStatus.SC_MOVED_PERMANENTLY);
200 |         responseJson.put("headers", headerJson);
201 |         responseJson.put("isBase64Encoded", false);
202 | 
203 |         internalSendResponse(outputStream, responseJson);
204 |     }
205 | 
206 |     private void internalSendResponse(OutputStream outputStream, JSONObject responseJson) throws IOException {
207 |         logger.debug(responseJson.toJSONString());
208 |         OutputStreamWriter writer = new OutputStreamWriter(outputStream, "UTF-8");
209 |         writer.write(responseJson.toJSONString());
210 |         writer.close();
211 |     }
212 | 
213 |     @SuppressWarnings("unchecked")
214 |     Map getJSONObject(JSONObject parent, String key) {
215 |         Object value = parent.get(key);
216 |         Map map = new HashMap<>();
217 |         if (value instanceof JSONObject) {
218 |             map.putAll((JSONObject) value);
219 |         }
220 |         return map;
221 |     }
222 | 
223 |     String getEncodedUml(JSONObject event) throws IOException {
224 |         if (event.get("pathParameters") != null) {
225 |             JSONObject pps = (JSONObject) event.get("pathParameters");
226 |             if (pps.get("encodedUml") == null) {
227 |                 handleInputError(null);
228 |             }
229 |             return (String) pps.get("encodedUml");
230 |         }
231 |         return null;
232 |     }
233 | 
234 |     boolean isNitorStyle(JSONObject event) {
235 |         JSONObject qsp;
236 |         if ((event == null) || (qsp = (JSONObject) event.get("queryStringParameters")) == null) {
237 |             return false;
238 |         }
239 |         return qsp.get("nitorStyle") != null;
240 |     }
241 | 
242 |     JSONObject parseEvent(InputStream inputStream) {
243 |         BufferedReader reader = new BufferedReader(new InputStreamReader(inputStream));
244 |         final JSONParser parser = new JSONParser();
245 |         try {
246 |             JSONObject event = (JSONObject) parser.parse(reader);
247 |             logger.debug(event.toJSONString());
248 |             return event;
249 |         } catch (Exception e) {
250 |             handleInputError(e);
251 |         }
252 |         return null;
253 |     }
254 | 
255 |     private void handleInputError(Exception e) {
256 |         throw new IllegalArgumentException("Could not parse parameters", e);
257 |     }
258 | }


--------------------------------------------------------------------------------
/LICENSE:
--------------------------------------------------------------------------------
  1 |                     GNU GENERAL PUBLIC LICENSE
  2 |                        Version 3, 29 June 2007
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396 | not survive such relicensing or conveying.
397 | 
398 |   If you add terms to a covered work in accord with this section, you
399 | must place, in the relevant source files, a statement of the
400 | additional terms that apply to those files, or a notice indicating
401 | where to find the applicable terms.
402 | 
403 |   Additional terms, permissive or non-permissive, may be stated in the
404 | form of a separately written license, or stated as exceptions;
405 | the above requirements apply either way.
406 | 
407 |   8. Termination.
408 | 
409 |   You may not propagate or modify a covered work except as expressly
410 | provided under this License.  Any attempt otherwise to propagate or
411 | modify it is void, and will automatically terminate your rights under
412 | this License (including any patent licenses granted under the third
413 | paragraph of section 11).
414 | 
415 |   However, if you cease all violation of this License, then your
416 | license from a particular copyright holder is reinstated (a)
417 | provisionally, unless and until the copyright holder explicitly and
418 | finally terminates your license, and (b) permanently, if the copyright
419 | holder fails to notify you of the violation by some reasonable means
420 | prior to 60 days after the cessation.
421 | 
422 |   Moreover, your license from a particular copyright holder is
423 | reinstated permanently if the copyright holder notifies you of the
424 | violation by some reasonable means, this is the first time you have
425 | received notice of violation of this License (for any work) from that
426 | copyright holder, and you cure the violation prior to 30 days after
427 | your receipt of the notice.
428 | 
429 |   Termination of your rights under this section does not terminate the
430 | licenses of parties who have received copies or rights from you under
431 | this License.  If your rights have been terminated and not permanently
432 | reinstated, you do not qualify to receive new licenses for the same
433 | material under section 10.
434 | 
435 |   9. Acceptance Not Required for Having Copies.
436 | 
437 |   You are not required to accept this License in order to receive or
438 | run a copy of the Program.  Ancillary propagation of a covered work
439 | occurring solely as a consequence of using peer-to-peer transmission
440 | to receive a copy likewise does not require acceptance.  However,
441 | nothing other than this License grants you permission to propagate or
442 | modify any covered work.  These actions infringe copyright if you do
443 | not accept this License.  Therefore, by modifying or propagating a
444 | covered work, you indicate your acceptance of this License to do so.
445 | 
446 |   10. Automatic Licensing of Downstream Recipients.
447 | 
448 |   Each time you convey a covered work, the recipient automatically
449 | receives a license from the original licensors, to run, modify and
450 | propagate that work, subject to this License.  You are not responsible
451 | for enforcing compliance by third parties with this License.
452 | 
453 |   An "entity transaction" is a transaction transferring control of an
454 | organization, or substantially all assets of one, or subdividing an
455 | organization, or merging organizations.  If propagation of a covered
456 | work results from an entity transaction, each party to that
457 | transaction who receives a copy of the work also receives whatever
458 | licenses to the work the party's predecessor in interest had or could
459 | give under the previous paragraph, plus a right to possession of the
460 | Corresponding Source of the work from the predecessor in interest, if
461 | the predecessor has it or can get it with reasonable efforts.
462 | 
463 |   You may not impose any further restrictions on the exercise of the
464 | rights granted or affirmed under this License.  For example, you may
465 | not impose a license fee, royalty, or other charge for exercise of
466 | rights granted under this License, and you may not initiate litigation
467 | (including a cross-claim or counterclaim in a lawsuit) alleging that
468 | any patent claim is infringed by making, using, selling, offering for
469 | sale, or importing the Program or any portion of it.
470 | 
471 |   11. Patents.
472 | 
473 |   A "contributor" is a copyright holder who authorizes use under this
474 | License of the Program or a work on which the Program is based.  The
475 | work thus licensed is called the contributor's "contributor version".
476 | 
477 |   A contributor's "essential patent claims" are all patent claims
478 | owned or controlled by the contributor, whether already acquired or
479 | hereafter acquired, that would be infringed by some manner, permitted
480 | by this License, of making, using, or selling its contributor version,
481 | but do not include claims that would be infringed only as a
482 | consequence of further modification of the contributor version.  For
483 | purposes of this definition, "control" includes the right to grant
484 | patent sublicenses in a manner consistent with the requirements of
485 | this License.
486 | 
487 |   Each contributor grants you a non-exclusive, worldwide, royalty-free
488 | patent license under the contributor's essential patent claims, to
489 | make, use, sell, offer for sale, import and otherwise run, modify and
490 | propagate the contents of its contributor version.
491 | 
492 |   In the following three paragraphs, a "patent license" is any express
493 | agreement or commitment, however denominated, not to enforce a patent
494 | (such as an express permission to practice a patent or covenant not to
495 | sue for patent infringement).  To "grant" such a patent license to a
496 | party means to make such an agreement or commitment not to enforce a
497 | patent against the party.
498 | 
499 |   If you convey a covered work, knowingly relying on a patent license,
500 | and the Corresponding Source of the work is not available for anyone
501 | to copy, free of charge and under the terms of this License, through a
502 | publicly available network server or other readily accessible means,
503 | then you must either (1) cause the Corresponding Source to be so
504 | available, or (2) arrange to deprive yourself of the benefit of the
505 | patent license for this particular work, or (3) arrange, in a manner
506 | consistent with the requirements of this License, to extend the patent
507 | license to downstream recipients.  "Knowingly relying" means you have
508 | actual knowledge that, but for the patent license, your conveying the
509 | covered work in a country, or your recipient's use of the covered work
510 | in a country, would infringe one or more identifiable patents in that
511 | country that you have reason to believe are valid.
512 | 
513 |   If, pursuant to or in connection with a single transaction or
514 | arrangement, you convey, or propagate by procuring conveyance of, a
515 | covered work, and grant a patent license to some of the parties
516 | receiving the covered work authorizing them to use, propagate, modify
517 | or convey a specific copy of the covered work, then the patent license
518 | you grant is automatically extended to all recipients of the covered
519 | work and works based on it.
520 | 
521 |   A patent license is "discriminatory" if it does not include within
522 | the scope of its coverage, prohibits the exercise of, or is
523 | conditioned on the non-exercise of one or more of the rights that are
524 | specifically granted under this License.  You may not convey a covered
525 | work if you are a party to an arrangement with a third party that is
526 | in the business of distributing software, under which you make payment
527 | to the third party based on the extent of your activity of conveying
528 | the work, and under which the third party grants, to any of the
529 | parties who would receive the covered work from you, a discriminatory
530 | patent license (a) in connection with copies of the covered work
531 | conveyed by you (or copies made from those copies), or (b) primarily
532 | for and in connection with specific products or compilations that
533 | contain the covered work, unless you entered into that arrangement,
534 | or that patent license was granted, prior to 28 March 2007.
535 | 
536 |   Nothing in this License shall be construed as excluding or limiting
537 | any implied license or other defenses to infringement that may
538 | otherwise be available to you under applicable patent law.
539 | 
540 |   12. No Surrender of Others' Freedom.
541 | 
542 |   If conditions are imposed on you (whether by court order, agreement or
543 | otherwise) that contradict the conditions of this License, they do not
544 | excuse you from the conditions of this License.  If you cannot convey a
545 | covered work so as to satisfy simultaneously your obligations under this
546 | License and any other pertinent obligations, then as a consequence you may
547 | not convey it at all.  For example, if you agree to terms that obligate you
548 | to collect a royalty for further conveying from those to whom you convey
549 | the Program, the only way you could satisfy both those terms and this
550 | License would be to refrain entirely from conveying the Program.
551 | 
552 |   13. Use with the GNU Affero General Public License.
553 | 
554 |   Notwithstanding any other provision of this License, you have
555 | permission to link or combine any covered work with a work licensed
556 | under version 3 of the GNU Affero General Public License into a single
557 | combined work, and to convey the resulting work.  The terms of this
558 | License will continue to apply to the part which is the covered work,
559 | but the special requirements of the GNU Affero General Public License,
560 | section 13, concerning interaction through a network will apply to the
561 | combination as such.
562 | 
563 |   14. Revised Versions of this License.
564 | 
565 |   The Free Software Foundation may publish revised and/or new versions of
566 | the GNU General Public License from time to time.  Such new versions will
567 | be similar in spirit to the present version, but may differ in detail to
568 | address new problems or concerns.
569 | 
570 |   Each version is given a distinguishing version number.  If the
571 | Program specifies that a certain numbered version of the GNU General
572 | Public License "or any later version" applies to it, you have the
573 | option of following the terms and conditions either of that numbered
574 | version or of any later version published by the Free Software
575 | Foundation.  If the Program does not specify a version number of the
576 | GNU General Public License, you may choose any version ever published
577 | by the Free Software Foundation.
578 | 
579 |   If the Program specifies that a proxy can decide which future
580 | versions of the GNU General Public License can be used, that proxy's
581 | public statement of acceptance of a version permanently authorizes you
582 | to choose that version for the Program.
583 | 
584 |   Later license versions may give you additional or different
585 | permissions.  However, no additional obligations are imposed on any
586 | author or copyright holder as a result of your choosing to follow a
587 | later version.
588 | 
589 |   15. Disclaimer of Warranty.
590 | 
591 |   THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY
592 | APPLICABLE LAW.  EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT
593 | HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY
594 | OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO,
595 | THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
596 | PURPOSE.  THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM
597 | IS WITH YOU.  SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF
598 | ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
599 | 
600 |   16. Limitation of Liability.
601 | 
602 |   IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
603 | WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS
604 | THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY
605 | GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE
606 | USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF
607 | DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD
608 | PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS),
609 | EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF
610 | SUCH DAMAGES.
611 | 
612 |   17. Interpretation of Sections 15 and 16.
613 | 
614 |   If the disclaimer of warranty and limitation of liability provided
615 | above cannot be given local legal effect according to their terms,
616 | reviewing courts shall apply local law that most closely approximates
617 | an absolute waiver of all civil liability in connection with the
618 | Program, unless a warranty or assumption of liability accompanies a
619 | copy of the Program in return for a fee.
620 | 
621 |                      END OF TERMS AND CONDITIONS
622 | 
623 |             How to Apply These Terms to Your New Programs
624 | 
625 |   If you develop a new program, and you want it to be of the greatest
626 | possible use to the public, the best way to achieve this is to make it
627 | free software which everyone can redistribute and change under these terms.
628 | 
629 |   To do so, attach the following notices to the program.  It is safest
630 | to attach them to the start of each source file to most effectively
631 | state the exclusion of warranty; and each file should have at least
632 | the "copyright" line and a pointer to where the full notice is found.
633 | 
634 |     
635 |     Copyright (C)   
636 | 
637 |     This program is free software: you can redistribute it and/or modify
638 |     it under the terms of the GNU General Public License as published by
639 |     the Free Software Foundation, either version 3 of the License, or
640 |     (at your option) any later version.
641 | 
642 |     This program is distributed in the hope that it will be useful,
643 |     but WITHOUT ANY WARRANTY; without even the implied warranty of
644 |     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
645 |     GNU General Public License for more details.
646 | 
647 |     You should have received a copy of the GNU General Public License
648 |     along with this program.  If not, see .
649 | 
650 | Also add information on how to contact you by electronic and paper mail.
651 | 
652 |   If the program does terminal interaction, make it output a short
653 | notice like this when it starts in an interactive mode:
654 | 
655 |       Copyright (C)   
656 |     This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
657 |     This is free software, and you are welcome to redistribute it
658 |     under certain conditions; type `show c' for details.
659 | 
660 | The hypothetical commands `show w' and `show c' should show the appropriate
661 | parts of the General Public License.  Of course, your program's commands
662 | might be different; for a GUI interface, you would use an "about box".
663 | 
664 |   You should also get your employer (if you work as a programmer) or school,
665 | if any, to sign a "copyright disclaimer" for the program, if necessary.
666 | For more information on this, and how to apply and follow the GNU GPL, see
667 | .
668 | 
669 |   The GNU General Public License does not permit incorporating your program
670 | into proprietary programs.  If your program is a subroutine library, you
671 | may consider it more useful to permit linking proprietary applications with
672 | the library.  If this is what you want to do, use the GNU Lesser General
673 | Public License instead of this License.  But first, please read
674 | .
675 | 


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