├── .gitattributes ├── .github ├── FUNDING.yml └── ISSUE_TEMPLATE │ ├── bug_report.md │ ├── config.yml │ ├── documentation_request.md │ ├── feature_request.md │ └── merge_branch_request.yml ├── .gitignore ├── CODE_OF_CONDUCT.md ├── CONTRIBUTORS.md ├── Dockerfile ├── LICENSE ├── Procfile ├── README.md ├── build.gradle ├── gradle └── wrapper │ ├── gradle-wrapper.jar │ └── gradle-wrapper.properties ├── gradlew ├── gradlew.bat ├── settings.gradle ├── src ├── main │ ├── java │ │ └── evrentan │ │ │ └── qrcodegenerator │ │ │ └── qrcodegeneratorbackend │ │ │ ├── controller │ │ │ └── QrCodeController.java │ │ │ ├── dto │ │ │ ├── GenerateQrCodeRequest.java │ │ │ └── shared │ │ │ │ └── CustomRestError.java │ │ │ ├── exception │ │ │ ├── GlobalRestExceptionHandler.java │ │ │ └── QrCodeTextValidationException.java │ │ │ ├── filter │ │ │ └── CORSFilter.java │ │ │ ├── impl │ │ │ └── QrCodeServiceImpl.java │ │ │ ├── message │ │ │ └── ExceptionMessages.java │ │ │ ├── service │ │ │ └── QrCodeService.java │ │ │ └── spring │ │ │ ├── config │ │ │ ├── BufferedImageHttpConverterConfig.java │ │ │ ├── CommonConfig.java │ │ │ ├── SecurityConfig.java │ │ │ ├── SwaggerConfig.java │ │ │ └── WebConfig.java │ │ │ └── spring │ │ │ └── QrCodeGeneratorBackendApplication.java │ └── resources │ │ └── application.properties └── test │ └── java │ └── evrentan │ └── qrcodegenerator │ └── qrcodegeneratorbackend │ └── QrCodeGeneratorBackendApplicationTests.java └── system.properties /.gitattributes: -------------------------------------------------------------------------------- 1 | # Auto detect text files and perform LF normalization 2 | * text=auto 3 | -------------------------------------------------------------------------------- /.github/FUNDING.yml: -------------------------------------------------------------------------------- 1 | github: [evrentan] 2 | -------------------------------------------------------------------------------- /.github/ISSUE_TEMPLATE/bug_report.md: -------------------------------------------------------------------------------- 1 | --- 2 | name: Bug report 3 | about: Create a report to help us improve 4 | title: "[Bug]: " 5 | labels: ["bug"] 6 | assignees: 7 | - evrentan 8 | 9 | --- 10 | 11 | **Describe the bug** 12 | A clear and concise description of what the bug is. 13 | 14 | **To Reproduce** 15 | Steps to reproduce the behavior: 16 | 1. Go to '...' 17 | 2. Click on '....' 18 | 3. Scroll down to '....' 19 | 4. See error 20 | 21 | **Expected behavior** 22 | A clear and concise description of what you expected to happen. 23 | 24 | **Screenshots** 25 | If applicable, add screenshots to help explain your problem. 26 | 27 | **Desktop (please complete the following information):** 28 | - OS: [e.g. iOS] 29 | - Browser [e.g. chrome, safari] 30 | - Version [e.g. 22] 31 | 32 | **Smartphone (please complete the following information):** 33 | - Device: [e.g. iPhone6] 34 | - OS: [e.g. iOS8.1] 35 | - Browser [e.g. stock browser, safari] 36 | - Version [e.g. 22] 37 | 38 | **Additional context** 39 | Add any other context about the problem here. 40 | -------------------------------------------------------------------------------- /.github/ISSUE_TEMPLATE/config.yml: -------------------------------------------------------------------------------- 1 | blank_issues_enabled: false -------------------------------------------------------------------------------- /.github/ISSUE_TEMPLATE/documentation_request.md: -------------------------------------------------------------------------------- 1 | --- 2 | name: Documentation request 3 | about: Documentation request for this project 4 | title: "[Documentation]: " 5 | labels: ["documentation"] 6 | assignees: 7 | - evrentan 8 | 9 | --- 10 | 11 | **Is your documentation request related to a problem? Please describe.** 12 | A clear and concise description of what the problem is. Ex. I'm always frustrated when [...] 13 | 14 | **Describe the documentation you'd like** 15 | A clear and concise description of what you want to have in your documentation. 16 | 17 | **Additional context** 18 | Add any other context, screenshots or references about the documentation request here. 19 | -------------------------------------------------------------------------------- /.github/ISSUE_TEMPLATE/feature_request.md: -------------------------------------------------------------------------------- 1 | --- 2 | name: Feature request 3 | about: Suggest an idea for this project 4 | title: "[Feature]: " 5 | labels: ["enhancement"] 6 | assignees: 7 | - evrentan 8 | 9 | --- 10 | 11 | **Is your feature request related to a problem? Please describe.** 12 | A clear and concise description of what the problem is. Ex. I'm always frustrated when [...] 13 | 14 | **Describe the solution you'd like** 15 | A clear and concise description of what you want to happen. 16 | 17 | **Describe alternatives you've considered** 18 | A clear and concise description of any alternative solutions or features you've considered. 19 | 20 | **Additional context** 21 | Add any other context or screenshots about the feature request here. 22 | -------------------------------------------------------------------------------- /.github/ISSUE_TEMPLATE/merge_branch_request.yml: -------------------------------------------------------------------------------- 1 | name: Merge Branch Request 2 | description: Merge Branch Request 3 | title: "[Merge Branch]: " 4 | labels: ["merge branch"] 5 | assignees: 6 | - evrentan 7 | 8 | body: 9 | - type: markdown 10 | attributes: 11 | value: | 12 | Please state the origin branch & target branch for this merge request ‼️ 13 | - type: dropdown 14 | id: originBranch 15 | attributes: 16 | label: Origin Branch 17 | description: What is the origin branch for the PR? 18 | options: 19 | - staging 20 | - main 21 | validations: 22 | required: true 23 | - type: dropdown 24 | id: targetBranch 25 | attributes: 26 | label: Origin Branch 27 | description: What is the target branch for the PR? 28 | options: 29 | - staging 30 | - main 31 | validations: 32 | required: true 33 | -------------------------------------------------------------------------------- /.gitignore: -------------------------------------------------------------------------------- 1 | HELP.md 2 | .gradle 3 | build/ 4 | !gradle/wrapper/gradle-wrapper.jar 5 | !**/src/main/**/build/ 6 | !**/src/test/**/build/ 7 | 8 | ### STS ### 9 | .apt_generated 10 | .classpath 11 | .factorypath 12 | .project 13 | .settings 14 | .springBeans 15 | .sts4-cache 16 | bin/ 17 | !**/src/main/**/bin/ 18 | !**/src/test/**/bin/ 19 | 20 | ### IntelliJ IDEA ### 21 | .idea 22 | *.iws 23 | *.iml 24 | *.ipr 25 | out/ 26 | !**/src/main/**/out/ 27 | !**/src/test/**/out/ 28 | 29 | ### NetBeans ### 30 | /nbproject/private/ 31 | /nbbuild/ 32 | /dist/ 33 | /nbdist/ 34 | /.nb-gradle/ 35 | 36 | ### VS Code ### 37 | .vscode/ 38 | -------------------------------------------------------------------------------- /CODE_OF_CONDUCT.md: -------------------------------------------------------------------------------- 1 | # Contributor Covenant Code of Conduct 2 | 3 | ## Our Pledge 4 | 5 | We as members, contributors, and leaders pledge to make participation in our 6 | community a harassment-free experience for everyone, regardless of age, body 7 | size, visible or invisible disability, ethnicity, sex characteristics, gender 8 | identity and expression, level of experience, education, socio-economic status, 9 | nationality, personal appearance, race, caste, color, religion, or sexual 10 | identity and orientation. 11 | 12 | We pledge to act and interact in ways that contribute to an open, welcoming, 13 | diverse, inclusive, and healthy community. 14 | 15 | ## Our Standards 16 | 17 | Examples of behavior that contributes to a positive environment for our 18 | community include: 19 | 20 | * Demonstrating empathy and kindness toward other people 21 | * Being respectful of differing opinions, viewpoints, and experiences 22 | * Giving and gracefully accepting constructive feedback 23 | * Accepting responsibility and apologizing to those affected by our mistakes, 24 | and learning from the experience 25 | * Focusing on what is best not just for us as individuals, but for the overall 26 | community 27 | 28 | Examples of unacceptable behavior include: 29 | 30 | * The use of sexualized language or imagery, and sexual attention or advances of 31 | any kind 32 | * Trolling, insulting or derogatory comments, and personal or political attacks 33 | * Public or private harassment 34 | * Publishing others' private information, such as a physical or email address, 35 | without their explicit permission 36 | * Other conduct which could reasonably be considered inappropriate in a 37 | professional setting 38 | 39 | ## Enforcement Responsibilities 40 | 41 | Community leaders are responsible for clarifying and enforcing our standards of 42 | acceptable behavior and will take appropriate and fair corrective action in 43 | response to any behavior that they deem inappropriate, threatening, offensive, 44 | or harmful. 45 | 46 | Community leaders have the right and responsibility to remove, edit, or reject 47 | comments, commits, code, wiki edits, issues, and other contributions that are 48 | not aligned to this Code of Conduct, and will communicate reasons for moderation 49 | decisions when appropriate. 50 | 51 | ## Scope 52 | 53 | This Code of Conduct applies within all community spaces, and also applies when 54 | an individual is officially representing the community in public spaces. 55 | Examples of representing our community include using an official e-mail address, 56 | posting via an official social media account, or acting as an appointed 57 | representative at an online or offline event. 58 | 59 | ## Enforcement 60 | 61 | Instances of abusive, harassing, or otherwise unacceptable behavior may be 62 | reported to the community leaders responsible for enforcement at 63 | [INSERT CONTACT METHOD]. 64 | All complaints will be reviewed and investigated promptly and fairly. 65 | 66 | All community leaders are obligated to respect the privacy and security of the 67 | reporter of any incident. 68 | 69 | ## Enforcement Guidelines 70 | 71 | Community leaders will follow these Community Impact Guidelines in determining 72 | the consequences for any action they deem in violation of this Code of Conduct: 73 | 74 | ### 1. Correction 75 | 76 | **Community Impact**: Use of inappropriate language or other behavior deemed 77 | unprofessional or unwelcome in the community. 78 | 79 | **Consequence**: A private, written warning from community leaders, providing 80 | clarity around the nature of the violation and an explanation of why the 81 | behavior was inappropriate. A public apology may be requested. 82 | 83 | ### 2. Warning 84 | 85 | **Community Impact**: A violation through a single incident or series of 86 | actions. 87 | 88 | **Consequence**: A warning with consequences for continued behavior. No 89 | interaction with the people involved, including unsolicited interaction with 90 | those enforcing the Code of Conduct, for a specified period of time. This 91 | includes avoiding interactions in community spaces as well as external channels 92 | like social media. Violating these terms may lead to a temporary or permanent 93 | ban. 94 | 95 | ### 3. Temporary Ban 96 | 97 | **Community Impact**: A serious violation of community standards, including 98 | sustained inappropriate behavior. 99 | 100 | **Consequence**: A temporary ban from any sort of interaction or public 101 | communication with the community for a specified period of time. No public or 102 | private interaction with the people involved, including unsolicited interaction 103 | with those enforcing the Code of Conduct, is allowed during this period. 104 | Violating these terms may lead to a permanent ban. 105 | 106 | ### 4. Permanent Ban 107 | 108 | **Community Impact**: Demonstrating a pattern of violation of community 109 | standards, including sustained inappropriate behavior, harassment of an 110 | individual, or aggression toward or disparagement of classes of individuals. 111 | 112 | **Consequence**: A permanent ban from any sort of public interaction within the 113 | community. 114 | 115 | ## Attribution 116 | 117 | This Code of Conduct is adapted from the [Contributor Covenant][homepage], 118 | version 2.1, available at 119 | [https://www.contributor-covenant.org/version/2/1/code_of_conduct.html][v2.1]. 120 | 121 | Community Impact Guidelines were inspired by 122 | [Mozilla's code of conduct enforcement ladder][Mozilla CoC]. 123 | 124 | For answers to common questions about this code of conduct, see the FAQ at 125 | [https://www.contributor-covenant.org/faq][FAQ]. Translations are available at 126 | [https://www.contributor-covenant.org/translations][translations]. 127 | 128 | [homepage]: https://www.contributor-covenant.org 129 | [v2.1]: https://www.contributor-covenant.org/version/2/1/code_of_conduct.html 130 | [Mozilla CoC]: https://github.com/mozilla/diversity 131 | [FAQ]: https://www.contributor-covenant.org/faq 132 | [translations]: https://www.contributor-covenant.org/translations 133 | -------------------------------------------------------------------------------- /CONTRIBUTORS.md: -------------------------------------------------------------------------------- 1 | Below you can find the names of the contributors to this project; 2 | 3 | - [Evren Tan][evren-tan-github] 4 | - [M. Said Gurbuz][shortlymsg-github] 5 | - [Ujwal Kumar][ujwal-kumar-github] 6 | - [Rohit Rajput][rohit-rajput-github] 7 | - [nMarulo][nmarulo-github] 8 | 9 | 👍🎉 Thank you all for contributing in this repository. Sharing is caring and open-source makes a wonderful development environment 🎉👍 10 | 11 | [evren-tan-github]: https://github.com/evrentan 12 | [shortlymsg-github]: https://github.com/ShortlyMsg 13 | [ujwal-kumar-github]: https://github.com/ujwalkumar1995 14 | [rohit-rajput-github]: https://github.com/Rohit-R2000 15 | [nmarulo-github]: https://github.com/nmarulo 16 | -------------------------------------------------------------------------------- /Dockerfile: -------------------------------------------------------------------------------- 1 | ARG APP_JAR=qr-code-generator-backend-1.0.0.jar 2 | FROM gradle:7-jdk17-alpine AS build 3 | COPY . /home/gradle/src 4 | WORKDIR /home/gradle/src 5 | RUN gradle build 6 | 7 | FROM openjdk:17-alpine 8 | ARG APP_JAR 9 | ENV APP_JAR_ENV=$APP_JAR 10 | EXPOSE 8081 11 | RUN mkdir /app 12 | COPY --from=build /home/gradle/src/build/libs/${APP_JAR_ENV} /app/${APP_JAR_ENV} 13 | ENTRYPOINT java -jar /app/${APP_JAR_ENV} -------------------------------------------------------------------------------- /LICENSE: -------------------------------------------------------------------------------- 1 | GNU GENERAL PUBLIC LICENSE 2 | Version 3, 29 June 2007 3 | 4 | Copyright (C) 2007 Free Software Foundation, Inc. 5 | Everyone is permitted to copy and distribute verbatim copies 6 | of this license document, but changing it is not allowed. 7 | 8 | Preamble 9 | 10 | The GNU General Public License is a free, copyleft license for 11 | software and other kinds of works. 12 | 13 | The licenses for most software and other practical works are designed 14 | to take away your freedom to share and change the works. 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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 | -------------------------------------------------------------------------------- /Procfile: -------------------------------------------------------------------------------- 1 | web: java -Dserver.port=$PORT $JAVA_OPTS -jar build/libs/qr-code-generator-backend-1.0.0.jar -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | # QR Code Generator BackEnd 2 | A QR Code Generator BackEnd application implemented in Java 17 using Zxing barcode processing library. 3 | 4 | QR Code Generator Backend serves on a [Heroku][heroku-reference] instance in production from the [QR Code Generator Backend End-Point][qr-code-generator-backend-endpoint]. 5 | 6 | ## Table of Contents 7 | 8 | 1. [How to Contribute](#how-to-contribute) 9 | 2. [Requirements](#requirements) 10 | 3. [Coding Standards](#coding-standards) 11 | 4. [Version Control Standards](#version-control-standards) 12 | 5. [Running the Application Locally](#running-the-application-locally) 13 | 6. [Running the Application in Docker](#running-the-application-in-docker) 14 | 7. [Run Actuator](#run-actuator) 15 | 8. [Run Swagger UI](#run-swagger-ui) 16 | 9. [Extra Notes](#extra-notes) 17 | 10. [Copyright](#copyright) 18 | 19 | ## How to Contribute 20 | 21 | For the contributor covenant to this project, please check the Code of Conduct file. 22 | 23 | [![Contributor Covenant][contributor]](CODE_OF_CONDUCT.md) 24 | 25 | ### Credits 26 | 27 | Please check the [Contributors List](CONTRIBUTORS.md) to see who makes this open-source alive. 28 | 29 | ## Requirements 30 | 31 | For building and running the application belows are required; 32 | 33 | - [Spring Boot 2.6.7][spring-boot-version] 34 | - [JDK 17][java-version] 35 | - [Gradle 7.3 or above][gradle-version] 36 | - [Zxing 3.5.0 or above][zxing] 37 | 38 | ## Coding Standards 39 | 40 | Below coding standards should be followed within the project; 41 | 42 | - Javadoc should be written for each class & method. @author, @since annotations should be added while adding or updating the javadoc 43 | - General code structure should be followed while adding or refactoring classes. 44 | 45 | ## Version Control Standards 46 | 47 | Below version control standards should be followed within the project; 48 | 49 | - The default branch is [staging branch][staging-branch-github-link]. 50 | - Feature enhancements or defect fixes should not be committed to the default branch, they should be coded in feature or bug branches. 51 | - Issues should be created for each feature or fix in the [QR Code Generator Workspace GitHub Repository Project][qr-code-generator-workspace-github]. 52 | - Pull request (PR) should be created for each feature/bug branch to [staging branch][staging-branch-github-link]. 53 | - While creating a PR "[Feature]: ", "[Bug]: " or "[Doc]: " prefix should be used to identify the PR type. 54 | - PRs should be linked with a valid issue in the [QR Code Generator Workspace GitHub Repository Project][qr-code-generator-workspace-github]. 55 | - If validations are passed in the [staging branch][staging-branch-github-link], then a merge branch request is created with "merge branch" label & a linked PR to the [main branch][main-branch-github-link]. 56 | 57 | ## Running the Application Locally 58 | 59 | Application can be run with [QrCodeGeneratorBackendApplication][qr-code-generator-manager-main-class] class. 60 | 61 | Alternatively you can use the [Spring Boot Gradle plugin][spring-boot-gradle-plugin] like so: 62 | 63 | ```shell 64 | gradle clean build 65 | gradle bootRun 66 | ``` 67 | 68 | ## Running the Application in Docker 69 | 70 | Application can be run in Docker. [Dockerfile](Dockerfile) in the project root folder is the configuration file for Docker build. 71 | 72 | ```shell 73 | docker build -t qr-code-generator:1.0.0 --build-arg APP_JAR=qr-code-generator-backend-1.0.0.jar . 74 | docker run -p 8081:8081 --name QrCodeGenerator qr-code-generator:1.0.0 75 | ``` 76 | Note that you can specify the name of the APP_JAR argument based on the jar file that is generated by gradle. If the argument is not provided, it will pick the default name specified in the Dockerfile. 77 | 78 | ## Run Actuator 79 | 80 | [Spring Boot Actuator][spring-boot-actuator] can be reached from [local url for Actuator][local-actuator]. 81 | 82 | Only health and caches endpoints are enabled by default. Configuration can be updated within the "actuator" section of the related application.properties file. 83 | 84 | ## Run Swagger UI 85 | [Swagger UI][swagger-ui] can be reached from [local url for Swagger UI][local-swagger-ui] and [production url for Swagger UI][production-swagger-ui]. 86 | 87 | ## Extra Notes 88 | 89 | * The module can be booted with Spring Cloud Config Server or directly within the application. In order to boot the project within itself, enable the properties in application.properties file and disable bootstrap.properties file. 90 | 91 | ## Copyright 92 | 93 | GNU General Public License v3.0 94 | Permissions of this strong copyleft license are conditioned on making available complete source code of licensed works and modifications, which include larger works using a licensed work, under the same license. Copyright and license notices must be preserved. Contributors provide an express grant of patent rights. 95 | Please check the [LICENSE](LICENSE) file for more details. 96 | 97 | [qr-code-generator-backend-endpoint]: https://qr-code-generator-backend.herokuapp.com/ 98 | [spring-boot-version]: https://spring.io/blog/2022/04/21/spring-boot-2-6-7-available-now 99 | [java-version]: https://www.oracle.com/java/technologies/javase/jdk17-archive-downloads.html 100 | [gradle-version]: https://gradle.org/releases/ 101 | [contributor]: https://img.shields.io/badge/Contributor%20Covenant-2.1-4baaaa.svg 102 | [qr-code-generator-workspace-github]: https://github.com/evrentan/qr-code-generator-workspace 103 | [qr-code-generator-manager-main-class]: src/main/java/evrentan/qrcodegenerator/qrcodegeneratorbackend/spring/spring/QrCodeGeneratorBackendApplication.java 104 | [spring-boot-gradle-plugin]: https://docs.spring.io/spring-boot/docs/current/gradle-plugin/reference/htmlsingle/ 105 | [spring-boot-actuator]: https://spring.io/guides/gs/actuator-service/ 106 | [local-actuator]: http://localhost:8082/actuator 107 | [zxing]: https://github.com/zxing/zxing 108 | [swagger-ui]: https://swagger.io/tools/swagger-ui/ 109 | [local-swagger-ui]: http://localhost:8081/swagger-ui/index.html 110 | [production-swagger-ui]: https://qr-code-generator-backend.herokuapp.com/swagger-ui/index.html 111 | [heroku-reference]: https://heroku.com 112 | [staging-branch-github-link]: https://github.com/evrentan/qr-code-generator-backend/tree/staging 113 | [main-branch-github-link]: https://github.com/evrentan/qr-code-generator-backend/tree/main -------------------------------------------------------------------------------- /build.gradle: -------------------------------------------------------------------------------- 1 | buildscript { 2 | repositories { 3 | mavenCentral() 4 | } 5 | dependencies { 6 | classpath 'org.springframework.boot:spring-boot-gradle-plugin' 7 | } 8 | } 9 | 10 | plugins { 11 | id 'org.springframework.boot' version '3.0.0' 12 | id 'io.spring.dependency-management' version '1.0.11.RELEASE' 13 | id 'java' 14 | } 15 | 16 | group = 'evrentan.qrcodegenerator' 17 | version = '1.0.0' 18 | 19 | apply plugin: 'java' 20 | sourceCompatibility = JavaVersion.VERSION_17 21 | targetCompatibility = JavaVersion.VERSION_17 22 | 23 | repositories { 24 | mavenCentral() 25 | maven { url "https://repo.spring.io/snapshot" } 26 | maven { url "https://repo.spring.io/milestone" } 27 | maven { url "https://repo.spring.io/release" } 28 | } 29 | 30 | configurations { 31 | compileOnly { 32 | extendsFrom annotationProcessor 33 | } 34 | } 35 | 36 | dependencies { 37 | implementation 'org.springframework.boot:spring-boot-starter-actuator' 38 | implementation group: 'javax.validation', name: 'validation-api', version: '2.0.1.Final' 39 | implementation 'org.springframework.boot:spring-boot-starter-web' 40 | implementation group: 'org.springdoc', name: 'springdoc-openapi-ui', version: '1.6.4' 41 | compileOnly 'org.projectlombok:lombok:1.18.24' 42 | annotationProcessor 'org.projectlombok:lombok:1.18.24' 43 | testImplementation 'org.springframework.boot:spring-boot-starter-test' 44 | implementation 'com.google.zxing:core:3.5.0' 45 | implementation 'com.google.zxing:javase:3.5.0' 46 | } 47 | 48 | tasks.register('stage') { 49 | dependsOn build 50 | } 51 | 52 | tasks.named('test') { 53 | useJUnitPlatform() 54 | } 55 | -------------------------------------------------------------------------------- /gradle/wrapper/gradle-wrapper.jar: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/evrentan/qr-code-generator-backend/1a3a163a062e64d93afc6faf8dad2e40899f01db/gradle/wrapper/gradle-wrapper.jar -------------------------------------------------------------------------------- /gradle/wrapper/gradle-wrapper.properties: -------------------------------------------------------------------------------- 1 | distributionBase=GRADLE_USER_HOME 2 | distributionPath=wrapper/dists 3 | distributionUrl=https\://services.gradle.org/distributions/gradle-7.4.1-bin.zip 4 | zipStoreBase=GRADLE_USER_HOME 5 | zipStorePath=wrapper/dists 6 | -------------------------------------------------------------------------------- /gradlew: -------------------------------------------------------------------------------- 1 | #!/bin/sh 2 | 3 | # 4 | # Copyright © 2015-2021 the original authors. 5 | # 6 | # Licensed under the Apache License, Version 2.0 (the "License"); 7 | # you may not use this file except in compliance with the License. 8 | # You may obtain a copy of the License at 9 | # 10 | # https://www.apache.org/licenses/LICENSE-2.0 11 | # 12 | # Unless required by applicable law or agreed to in writing, software 13 | # distributed under the License is distributed on an "AS IS" BASIS, 14 | # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 15 | # See the License for the specific language governing permissions and 16 | # limitations under the License. 17 | # 18 | 19 | ############################################################################## 20 | # 21 | # Gradle start up script for POSIX generated by Gradle. 22 | # 23 | # Important for running: 24 | # 25 | # (1) You need a POSIX-compliant shell to run this script. If your /bin/sh is 26 | # noncompliant, but you have some other compliant shell such as ksh or 27 | # bash, then to run this script, type that shell name before the whole 28 | # command line, like: 29 | # 30 | # ksh Gradle 31 | # 32 | # Busybox and similar reduced shells will NOT work, because this script 33 | # requires all of these POSIX shell features: 34 | # * functions; 35 | # * expansions «$var», «${var}», «${var:-default}», «${var+SET}», 36 | # «${var#prefix}», «${var%suffix}», and «$( cmd )»; 37 | # * compound commands having a testable exit status, especially «case»; 38 | # * various built-in commands including «command», «set», and «ulimit». 39 | # 40 | # Important for patching: 41 | # 42 | # (2) This script targets any POSIX shell, so it avoids extensions provided 43 | # by Bash, Ksh, etc; in particular arrays are avoided. 44 | # 45 | # The "traditional" practice of packing multiple parameters into a 46 | # space-separated string is a well documented source of bugs and security 47 | # problems, so this is (mostly) avoided, by progressively accumulating 48 | # options in "$@", and eventually passing that to Java. 49 | # 50 | # Where the inherited environment variables (DEFAULT_JVM_OPTS, JAVA_OPTS, 51 | # and GRADLE_OPTS) rely on word-splitting, this is performed explicitly; 52 | # see the in-line comments for details. 53 | # 54 | # There are tweaks for specific operating systems such as AIX, CygWin, 55 | # Darwin, MinGW, and NonStop. 56 | # 57 | # (3) This script is generated from the Groovy template 58 | # https://github.com/gradle/gradle/blob/master/subprojects/plugins/src/main/resources/org/gradle/api/internal/plugins/unixStartScript.txt 59 | # within the Gradle project. 60 | # 61 | # You can find Gradle at https://github.com/gradle/gradle/. 62 | # 63 | ############################################################################## 64 | 65 | # Attempt to set APP_HOME 66 | 67 | # Resolve links: $0 may be a link 68 | app_path=$0 69 | 70 | # Need this for daisy-chained symlinks. 71 | while 72 | APP_HOME=${app_path%"${app_path##*/}"} # leaves a trailing /; empty if no leading path 73 | [ -h "$app_path" ] 74 | do 75 | ls=$( ls -ld "$app_path" ) 76 | link=${ls#*' -> '} 77 | case $link in #( 78 | /*) app_path=$link ;; #( 79 | *) app_path=$APP_HOME$link ;; 80 | esac 81 | done 82 | 83 | APP_HOME=$( cd "${APP_HOME:-./}" && pwd -P ) || exit 84 | 85 | APP_NAME="Gradle" 86 | APP_BASE_NAME=${0##*/} 87 | 88 | # Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script. 89 | DEFAULT_JVM_OPTS='"-Xmx64m" "-Xms64m"' 90 | 91 | # Use the maximum available, or set MAX_FD != -1 to use that value. 92 | MAX_FD=maximum 93 | 94 | warn () { 95 | echo "$*" 96 | } >&2 97 | 98 | die () { 99 | echo 100 | echo "$*" 101 | echo 102 | exit 1 103 | } >&2 104 | 105 | # OS specific support (must be 'true' or 'false'). 106 | cygwin=false 107 | msys=false 108 | darwin=false 109 | nonstop=false 110 | case "$( uname )" in #( 111 | CYGWIN* ) cygwin=true ;; #( 112 | Darwin* ) darwin=true ;; #( 113 | MSYS* | MINGW* ) msys=true ;; #( 114 | NONSTOP* ) nonstop=true ;; 115 | esac 116 | 117 | CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar 118 | 119 | 120 | # Determine the Java command to use to start the JVM. 121 | if [ -n "$JAVA_HOME" ] ; then 122 | if [ -x "$JAVA_HOME/jre/sh/java" ] ; then 123 | # IBM's JDK on AIX uses strange locations for the executables 124 | JAVACMD=$JAVA_HOME/jre/sh/java 125 | else 126 | JAVACMD=$JAVA_HOME/bin/java 127 | fi 128 | if [ ! -x "$JAVACMD" ] ; then 129 | die "ERROR: JAVA_HOME is set to an invalid directory: $JAVA_HOME 130 | 131 | Please set the JAVA_HOME variable in your environment to match the 132 | location of your Java installation." 133 | fi 134 | else 135 | JAVACMD=java 136 | which java >/dev/null 2>&1 || die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH. 137 | 138 | Please set the JAVA_HOME variable in your environment to match the 139 | location of your Java installation." 140 | fi 141 | 142 | # Increase the maximum file descriptors if we can. 143 | if ! "$cygwin" && ! "$darwin" && ! "$nonstop" ; then 144 | case $MAX_FD in #( 145 | max*) 146 | MAX_FD=$( ulimit -H -n ) || 147 | warn "Could not query maximum file descriptor limit" 148 | esac 149 | case $MAX_FD in #( 150 | '' | soft) :;; #( 151 | *) 152 | ulimit -n "$MAX_FD" || 153 | warn "Could not set maximum file descriptor limit to $MAX_FD" 154 | esac 155 | fi 156 | 157 | # Collect all arguments for the java command, stacking in reverse order: 158 | # * args from the command line 159 | # * the main class name 160 | # * -classpath 161 | # * -D...appname settings 162 | # * --module-path (only if needed) 163 | # * DEFAULT_JVM_OPTS, JAVA_OPTS, and GRADLE_OPTS environment variables. 164 | 165 | # For Cygwin or MSYS, switch paths to Windows format before running java 166 | if "$cygwin" || "$msys" ; then 167 | APP_HOME=$( cygpath --path --mixed "$APP_HOME" ) 168 | CLASSPATH=$( cygpath --path --mixed "$CLASSPATH" ) 169 | 170 | JAVACMD=$( cygpath --unix "$JAVACMD" ) 171 | 172 | # Now convert the arguments - kludge to limit ourselves to /bin/sh 173 | for arg do 174 | if 175 | case $arg in #( 176 | -*) false ;; # don't mess with options #( 177 | /?*) t=${arg#/} t=/${t%%/*} # looks like a POSIX filepath 178 | [ -e "$t" ] ;; #( 179 | *) false ;; 180 | esac 181 | then 182 | arg=$( cygpath --path --ignore --mixed "$arg" ) 183 | fi 184 | # Roll the args list around exactly as many times as the number of 185 | # args, so each arg winds up back in the position where it started, but 186 | # possibly modified. 187 | # 188 | # NB: a `for` loop captures its iteration list before it begins, so 189 | # changing the positional parameters here affects neither the number of 190 | # iterations, nor the values presented in `arg`. 191 | shift # remove old arg 192 | set -- "$@" "$arg" # push replacement arg 193 | done 194 | fi 195 | 196 | # Collect all arguments for the java command; 197 | # * $DEFAULT_JVM_OPTS, $JAVA_OPTS, and $GRADLE_OPTS can contain fragments of 198 | # shell script including quotes and variable substitutions, so put them in 199 | # double quotes to make sure that they get re-expanded; and 200 | # * put everything else in single quotes, so that it's not re-expanded. 201 | 202 | set -- \ 203 | "-Dorg.gradle.appname=$APP_BASE_NAME" \ 204 | -classpath "$CLASSPATH" \ 205 | org.gradle.wrapper.GradleWrapperMain \ 206 | "$@" 207 | 208 | # Use "xargs" to parse quoted args. 209 | # 210 | # With -n1 it outputs one arg per line, with the quotes and backslashes removed. 211 | # 212 | # In Bash we could simply go: 213 | # 214 | # readarray ARGS < <( xargs -n1 <<<"$var" ) && 215 | # set -- "${ARGS[@]}" "$@" 216 | # 217 | # but POSIX shell has neither arrays nor command substitution, so instead we 218 | # post-process each arg (as a line of input to sed) to backslash-escape any 219 | # character that might be a shell metacharacter, then use eval to reverse 220 | # that process (while maintaining the separation between arguments), and wrap 221 | # the whole thing up as a single "set" statement. 222 | # 223 | # This will of course break if any of these variables contains a newline or 224 | # an unmatched quote. 225 | # 226 | 227 | eval "set -- $( 228 | printf '%s\n' "$DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS" | 229 | xargs -n1 | 230 | sed ' s~[^-[:alnum:]+,./:=@_]~\\&~g; ' | 231 | tr '\n' ' ' 232 | )" '"$@"' 233 | 234 | exec "$JAVACMD" "$@" 235 | -------------------------------------------------------------------------------- /gradlew.bat: -------------------------------------------------------------------------------- 1 | @rem 2 | @rem Copyright 2015 the original author or authors. 3 | @rem 4 | @rem Licensed under the Apache License, Version 2.0 (the "License"); 5 | @rem you may not use this file except in compliance with the License. 6 | @rem You may obtain a copy of the License at 7 | @rem 8 | @rem https://www.apache.org/licenses/LICENSE-2.0 9 | @rem 10 | @rem Unless required by applicable law or agreed to in writing, software 11 | @rem distributed under the License is distributed on an "AS IS" BASIS, 12 | @rem WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 | @rem See the License for the specific language governing permissions and 14 | @rem limitations under the License. 15 | @rem 16 | 17 | @if "%DEBUG%" == "" @echo off 18 | @rem ########################################################################## 19 | @rem 20 | @rem Gradle startup script for Windows 21 | @rem 22 | @rem ########################################################################## 23 | 24 | @rem Set local scope for the variables with windows NT shell 25 | if "%OS%"=="Windows_NT" setlocal 26 | 27 | set DIRNAME=%~dp0 28 | if "%DIRNAME%" == "" set DIRNAME=. 29 | set APP_BASE_NAME=%~n0 30 | set APP_HOME=%DIRNAME% 31 | 32 | @rem Resolve any "." and ".." in APP_HOME to make it shorter. 33 | for %%i in ("%APP_HOME%") do set APP_HOME=%%~fi 34 | 35 | @rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script. 36 | set DEFAULT_JVM_OPTS="-Xmx64m" "-Xms64m" 37 | 38 | @rem Find java.exe 39 | if defined JAVA_HOME goto findJavaFromJavaHome 40 | 41 | set JAVA_EXE=java.exe 42 | %JAVA_EXE% -version >NUL 2>&1 43 | if "%ERRORLEVEL%" == "0" goto execute 44 | 45 | echo. 46 | echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH. 47 | echo. 48 | echo Please set the JAVA_HOME variable in your environment to match the 49 | echo location of your Java installation. 50 | 51 | goto fail 52 | 53 | :findJavaFromJavaHome 54 | set JAVA_HOME=%JAVA_HOME:"=% 55 | set JAVA_EXE=%JAVA_HOME%/bin/java.exe 56 | 57 | if exist "%JAVA_EXE%" goto execute 58 | 59 | echo. 60 | echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME% 61 | echo. 62 | echo Please set the JAVA_HOME variable in your environment to match the 63 | echo location of your Java installation. 64 | 65 | goto fail 66 | 67 | :execute 68 | @rem Setup the command line 69 | 70 | set CLASSPATH=%APP_HOME%\gradle\wrapper\gradle-wrapper.jar 71 | 72 | 73 | @rem Execute Gradle 74 | "%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" org.gradle.wrapper.GradleWrapperMain %* 75 | 76 | :end 77 | @rem End local scope for the variables with windows NT shell 78 | if "%ERRORLEVEL%"=="0" goto mainEnd 79 | 80 | :fail 81 | rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of 82 | rem the _cmd.exe /c_ return code! 83 | if not "" == "%GRADLE_EXIT_CONSOLE%" exit 1 84 | exit /b 1 85 | 86 | :mainEnd 87 | if "%OS%"=="Windows_NT" endlocal 88 | 89 | :omega 90 | -------------------------------------------------------------------------------- /settings.gradle: -------------------------------------------------------------------------------- 1 | rootProject.name = 'qr-code-generator-backend' 2 | -------------------------------------------------------------------------------- /src/main/java/evrentan/qrcodegenerator/qrcodegeneratorbackend/controller/QrCodeController.java: -------------------------------------------------------------------------------- 1 | package evrentan.qrcodegenerator.qrcodegeneratorbackend.controller; 2 | 3 | import evrentan.qrcodegenerator.qrcodegeneratorbackend.dto.GenerateQrCodeRequest; 4 | import evrentan.qrcodegenerator.qrcodegeneratorbackend.service.QrCodeService; 5 | import io.swagger.v3.oas.annotations.Operation; 6 | import io.swagger.v3.oas.annotations.responses.ApiResponse; 7 | import io.swagger.v3.oas.annotations.responses.ApiResponses; 8 | import io.swagger.v3.oas.annotations.tags.Tag; 9 | import lombok.AllArgsConstructor; 10 | import org.springframework.http.MediaType; 11 | import org.springframework.http.ResponseEntity; 12 | import org.springframework.web.bind.annotation.*; 13 | 14 | import javax.validation.constraints.NotNull; 15 | import java.net.URI; 16 | 17 | /** 18 | * REST Controller for QR Code related API end-points. 19 | * 20 | * @author Evren Tan 21 | * @since 1.0.0 22 | */ 23 | @AllArgsConstructor 24 | @RestController 25 | @RequestMapping(value = "/qrCode", consumes = MediaType.APPLICATION_JSON_VALUE) 26 | @Tag(name = "QR Code Related APIs") 27 | public class QrCodeController { 28 | 29 | private final QrCodeService qrCodeService; 30 | 31 | 32 | /** 33 | * REST end-point in order to generate QR code in Base64 String with POST operation. 34 | * Details related to API specs can be found in the API Documentation which can be reached as described in README file. 35 | * 36 | * @param generateQrCodeRequest object that is used to generate QR Code. Please, see the {@link GenerateQrCodeRequest} class for details. 37 | * @return String within ResponseEntity which corresponds to generated QR Code in base64 String. 38 | * 39 | * @author Evren Tan 40 | * @since 1.0.0 41 | */ 42 | @PostMapping(value = "/generate/qrCodeString", produces = MediaType.IMAGE_PNG_VALUE) 43 | @Operation(summary = "Generate QR Code in Base64 String", description = "Generate QR Code in Base64 String") 44 | @ApiResponses(value = { 45 | @ApiResponse(responseCode = "201", description = "Successfully Generate QR Code in Base64 String"), 46 | @ApiResponse(responseCode = "400", description = "Bad Request"), 47 | @ApiResponse(responseCode = "404", description = "Not Found"), 48 | @ApiResponse(responseCode = "500", description = "Internal Server Error") 49 | }) 50 | public ResponseEntity generateQrCodeStringWithPost(@RequestBody @NotNull GenerateQrCodeRequest generateQrCodeRequest) { 51 | return ResponseEntity.created(URI.create(generateQrCodeRequest.getQrCodeText())) 52 | .body(this.qrCodeService.generateQrCodeString(generateQrCodeRequest)); 53 | } 54 | 55 | /** 56 | * REST end-point in order to generate QR code in Base64 String with GET operation. 57 | * Details related to API specs can be found in the API Documentation which can be reached as described in README file. 58 | * 59 | * @param qrCodeText qr code text in string type that is used to generate QR Code. 60 | * @return String within ResponseEntity which corresponds to generated QR Code in base64 String. 61 | * 62 | * @author Evren Tan 63 | * @since 1.0.0 64 | */ 65 | @GetMapping(value = "/generate/qrCodeString", produces = MediaType.IMAGE_PNG_VALUE) 66 | @Operation(summary = "Generate QR Code in Base64 String", description = "Generate QR Code in Base64 String") 67 | @ApiResponses(value = { 68 | @ApiResponse(responseCode = "200", description = "Successfully Generate QR Code in Base64 String"), 69 | @ApiResponse(responseCode = "400", description = "Bad Request"), 70 | @ApiResponse(responseCode = "404", description = "Not Found"), 71 | @ApiResponse(responseCode = "500", description = "Internal Server Error") 72 | }) 73 | public ResponseEntity generateQrCodeStringWithGet(@RequestParam (value = "qrCodeText") @NotNull String qrCodeText) { 74 | return ResponseEntity.ok(this.qrCodeService.generateQrCodeString(GenerateQrCodeRequest.builder().qrCodeText(qrCodeText).build())); 75 | } 76 | 77 | /** 78 | * REST end-point in order to generate QR code in byteArray format with POST operation. 79 | * Details related to API specs can be found in the API Documentation which can be reached as described in README file. 80 | * 81 | * @param generateQrCodeRequest object that is used to generate QR Code. Please, see the {@link GenerateQrCodeRequest} class for details. 82 | * @return byte[] within ResponseEntity which corresponds to generated QR Code. 83 | * 84 | * @author Evren Tan 85 | * @since 1.0.0 86 | */ 87 | @PostMapping(value = "/generate/qrCodeByteArray", produces = MediaType.IMAGE_PNG_VALUE) 88 | @Operation(summary = "Generate QR Code in ByteArray Format with Post Operation", description = "Generate QR Code in ByteArray Format with Post Operation") 89 | @ApiResponses(value = { 90 | @ApiResponse(responseCode = "201", description = "Successfully Generate QR Code in ByteArray Format with Post Operation"), 91 | @ApiResponse(responseCode = "400", description = "Bad Request"), 92 | @ApiResponse(responseCode = "404", description = "Not Found"), 93 | @ApiResponse(responseCode = "500", description = "Internal Server Error") 94 | }) 95 | public ResponseEntity generateQrCodeByteArrayWithPost(@RequestBody @NotNull GenerateQrCodeRequest generateQrCodeRequest) { 96 | return ResponseEntity.created(URI.create(generateQrCodeRequest.getQrCodeText())) 97 | .body(this.qrCodeService.generateQrCodeByteArray(generateQrCodeRequest)); 98 | } 99 | 100 | /** 101 | * REST end-point in order to generate QR code in byteArray format with GET operation. 102 | * Details related to API specs can be found in the API Documentation which can be reached as described in README file. 103 | * 104 | * @param qrCodeText qr code text in string type that is used to generate QR Code. 105 | * @return byte[] within ResponseEntity which corresponds to generated QR Code. 106 | * 107 | * @author Evren Tan 108 | * @since 1.0.0 109 | */ 110 | @GetMapping(value = "/generate/qrCodeByteArray", produces = MediaType.IMAGE_PNG_VALUE) 111 | @Operation(summary = "Generate QR Code in ByteArray Format with Get Operation ", description = "Generate QR Code in ByteArray Format with Get Operation ") 112 | @ApiResponses(value = { 113 | @ApiResponse(responseCode = "200", description = "Successfully Generate QR Code in ByteArray Format with Get Operation "), 114 | @ApiResponse(responseCode = "400", description = "Bad Request"), 115 | @ApiResponse(responseCode = "404", description = "Not Found"), 116 | @ApiResponse(responseCode = "500", description = "Internal Server Error") 117 | }) 118 | public ResponseEntity generateQrCodeByteArrayWithGet(@RequestParam (value = "qrCodeText") @NotNull String qrCodeText) { 119 | return ResponseEntity.ok(this.qrCodeService.generateQrCodeByteArray(GenerateQrCodeRequest.builder().qrCodeText(qrCodeText).build())); 120 | } 121 | } 122 | -------------------------------------------------------------------------------- /src/main/java/evrentan/qrcodegenerator/qrcodegeneratorbackend/dto/GenerateQrCodeRequest.java: -------------------------------------------------------------------------------- 1 | package evrentan.qrcodegenerator.qrcodegeneratorbackend.dto; 2 | 3 | import io.swagger.v3.oas.annotations.media.Schema; 4 | import lombok.*; 5 | 6 | import javax.validation.constraints.NotNull; 7 | 8 | /** 9 | * GenerateQrCodeRequest Class. 10 | * 11 | * @author Evren Tan 12 | * @since 1.0.0 13 | */ 14 | @Getter @Setter 15 | @AllArgsConstructor(access = AccessLevel.PRIVATE) 16 | @NoArgsConstructor 17 | @EqualsAndHashCode @ToString 18 | @Builder 19 | @Schema(description = "Generate QR Code Request") 20 | public class GenerateQrCodeRequest { 21 | 22 | /** 23 | * QR Code Text in String Type 24 | * 25 | * @since 1.0.0 26 | */ 27 | @Schema(description = "QR Code Text in String Type") 28 | @NotNull 29 | private String qrCodeText; 30 | 31 | /** 32 | * QR Code Size in Integer Type. 33 | * 34 | * @since 1.0.0 35 | */ 36 | @Schema(description = "QR Code Size in Integer Type") 37 | private Integer size; 38 | 39 | /** 40 | * QR Code BackGround Color in String Type. 41 | * 42 | * @since 1.0.0 43 | */ 44 | @Schema(description = "QR Code BackGround Color in String Type") 45 | private String backGroundColor; 46 | } 47 | -------------------------------------------------------------------------------- /src/main/java/evrentan/qrcodegenerator/qrcodegeneratorbackend/dto/shared/CustomRestError.java: -------------------------------------------------------------------------------- 1 | package evrentan.qrcodegenerator.qrcodegeneratorbackend.dto.shared; 2 | 3 | import lombok.Builder; 4 | import lombok.Data; 5 | 6 | /** 7 | * Custom Rest Error class in order to handle returned error objects 8 | * 9 | * @author nmarulo 10 | * @since 1.0.0 11 | */ 12 | @Data 13 | @Builder 14 | public class CustomRestError { 15 | 16 | /** 17 | * Status of the customized REST error in Integer type. 18 | * 19 | * @since 1.0.0 20 | */ 21 | private Integer status; 22 | 23 | /** 24 | * Message of the customized REST error in String type. 25 | * 26 | * @since 1.0.0 27 | */ 28 | private String message; 29 | 30 | } 31 | -------------------------------------------------------------------------------- /src/main/java/evrentan/qrcodegenerator/qrcodegeneratorbackend/exception/GlobalRestExceptionHandler.java: -------------------------------------------------------------------------------- 1 | package evrentan.qrcodegenerator.qrcodegeneratorbackend.exception; 2 | 3 | import com.google.zxing.WriterException; 4 | import evrentan.qrcodegenerator.qrcodegeneratorbackend.dto.shared.CustomRestError; 5 | import jakarta.servlet.http.HttpServletRequest; 6 | import org.springframework.http.HttpStatus; 7 | import org.springframework.http.ResponseEntity; 8 | import org.springframework.web.bind.annotation.ExceptionHandler; 9 | import org.springframework.web.bind.annotation.RestControllerAdvice; 10 | 11 | import java.io.IOException; 12 | 13 | /** 14 | * Global Exception Handler Class 15 | * 16 | * @author nmarulo 17 | * @since 1.0.0 18 | */ 19 | @RestControllerAdvice 20 | public class GlobalRestExceptionHandler { 21 | 22 | /** 23 | * To handle error cases in I/O operations or error cases that may occur when encoding a barcode and return an internal server error. 24 | * 25 | * @param exception IOException | WriterException 26 | * @param request Web request 27 | * 28 | * @return ResponseEntity 29 | * 30 | * @author nmarulo 31 | * @since 1.0.0 32 | */ 33 | @ExceptionHandler(value = { 34 | IOException.class, 35 | WriterException.class 36 | }) 37 | public ResponseEntity processIOException(final Exception exception, final HttpServletRequest request) { 38 | var customRestError = CustomRestError.builder() 39 | .message(exception.getCause().getMessage()) 40 | .status(HttpStatus.INTERNAL_SERVER_ERROR.value()) 41 | .build(); 42 | 43 | return responseEntity(customRestError); 44 | } 45 | 46 | /** 47 | * To handle error cases in request validation and return a bad request. 48 | * 49 | * @param exception QrCodeTextValidationException 50 | * @param request Web request 51 | * 52 | * @return ResponseEntity 53 | * 54 | * @author nmarulo 55 | * @since 1.0.0 56 | */ 57 | @ExceptionHandler(value = { 58 | QrCodeTextValidationException.class 59 | }) 60 | public ResponseEntity processBadRequestException(final QrCodeTextValidationException exception, final HttpServletRequest request) { 61 | var customRestError = CustomRestError.builder() 62 | .message(exception.getMessage()) 63 | .status(HttpStatus.BAD_REQUEST.value()) 64 | .build(); 65 | 66 | return responseEntity(customRestError); 67 | } 68 | 69 | /** 70 | * To build ResponseEntity with CustomerRestError 71 | * 72 | * @param customRestError CustomerError to build the ResponseEntity 73 | * 74 | * @return ResponseEntity 75 | * 76 | * @author nmarulo 77 | * @since 1.0.0 78 | */ 79 | private static ResponseEntity responseEntity(CustomRestError customRestError) { 80 | return ResponseEntity.status(HttpStatus.valueOf(customRestError.getStatus())) 81 | .body(customRestError); 82 | } 83 | 84 | } 85 | -------------------------------------------------------------------------------- /src/main/java/evrentan/qrcodegenerator/qrcodegeneratorbackend/exception/QrCodeTextValidationException.java: -------------------------------------------------------------------------------- 1 | package evrentan.qrcodegenerator.qrcodegeneratorbackend.exception; 2 | 3 | public class QrCodeTextValidationException extends RuntimeException { 4 | 5 | private final String message; 6 | 7 | public QrCodeTextValidationException(String message) { 8 | this.message = message; 9 | } 10 | 11 | @Override 12 | public String getMessage() { 13 | return message; 14 | } 15 | } 16 | -------------------------------------------------------------------------------- /src/main/java/evrentan/qrcodegenerator/qrcodegeneratorbackend/filter/CORSFilter.java: -------------------------------------------------------------------------------- 1 | package evrentan.qrcodegenerator.qrcodegeneratorbackend.filter; 2 | 3 | import jakarta.servlet.*; 4 | import jakarta.servlet.http.HttpServletRequest; 5 | import jakarta.servlet.http.HttpServletResponse; 6 | import org.springframework.http.HttpHeaders; 7 | import org.springframework.http.HttpMethod; 8 | import org.springframework.http.HttpStatus; 9 | import org.springframework.http.MediaType; 10 | 11 | import java.io.IOException; 12 | import java.util.Objects; 13 | 14 | /** 15 | * CORSFilter class implementing Filter library of Javax Servlet 16 | * 17 | * @author Evren Tan 18 | * @since 1.0.0 19 | */ 20 | public class CORSFilter implements Filter { 21 | 22 | /** 23 | * Generate Byte Array Output Stream according to the given request 24 | * 25 | * @param servletRequest HTTP Servlet Request 26 | * @param servletResponse HTTP Servlet Response 27 | * @param filterChain filter chain object from servlet container to filter the request 28 | * @author Evren Tan 29 | * @since 1.0.0 30 | */ 31 | @Override 32 | public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException { 33 | 34 | HttpServletRequest request = (HttpServletRequest) servletRequest; 35 | HttpServletResponse response = (HttpServletResponse) servletResponse; 36 | 37 | response.setHeader(HttpHeaders.ACCESS_CONTROL_ALLOW_METHODS, String.join(",", HttpMethod.POST.name(), HttpMethod.GET.name(), HttpMethod.PUT.name(), HttpMethod.PATCH.name(), HttpMethod.DELETE.name(), HttpMethod.OPTIONS.name())); 38 | response.setHeader(HttpHeaders.ACCESS_CONTROL_ALLOW_HEADERS, String.join(",", HttpHeaders.AUTHORIZATION, HttpHeaders.ORIGIN, HttpHeaders.ACCEPT, HttpHeaders.CONTENT_TYPE, HttpHeaders.ACCESS_CONTROL_REQUEST_METHOD, HttpHeaders.ACCESS_CONTROL_REQUEST_HEADERS)); 39 | response.setContentType(MediaType.APPLICATION_JSON_VALUE); 40 | 41 | final String origin = request.getHeader(HttpHeaders.ORIGIN); 42 | if (Objects.nonNull(origin)) 43 | response.setHeader(HttpHeaders.ACCESS_CONTROL_ALLOW_ORIGIN, origin); 44 | 45 | if (request.getMethod().equalsIgnoreCase(HttpMethod.OPTIONS.name())) { 46 | response.getWriter().print(HttpStatus.OK.name()); 47 | response.getWriter().flush(); 48 | } else { 49 | filterChain.doFilter(request, response); 50 | } 51 | } 52 | } 53 | -------------------------------------------------------------------------------- /src/main/java/evrentan/qrcodegenerator/qrcodegeneratorbackend/impl/QrCodeServiceImpl.java: -------------------------------------------------------------------------------- 1 | package evrentan.qrcodegenerator.qrcodegeneratorbackend.impl; 2 | 3 | import com.google.zxing.BarcodeFormat; 4 | import com.google.zxing.WriterException; 5 | import com.google.zxing.client.j2se.MatrixToImageWriter; 6 | import com.google.zxing.common.BitMatrix; 7 | import com.google.zxing.qrcode.QRCodeWriter; 8 | import evrentan.qrcodegenerator.qrcodegeneratorbackend.dto.GenerateQrCodeRequest; 9 | import evrentan.qrcodegenerator.qrcodegeneratorbackend.exception.QrCodeTextValidationException; 10 | import evrentan.qrcodegenerator.qrcodegeneratorbackend.message.ExceptionMessages; 11 | import evrentan.qrcodegenerator.qrcodegeneratorbackend.service.QrCodeService; 12 | import org.springframework.stereotype.Service; 13 | 14 | import javax.imageio.ImageIO; 15 | import java.awt.image.BufferedImage; 16 | import java.io.ByteArrayOutputStream; 17 | import java.io.IOException; 18 | import java.util.Base64; 19 | import java.util.Objects; 20 | 21 | /** 22 | * QrCode Service Implementation for QrCode Service Layer. 23 | * 24 | * @author Evren Tan 25 | * @since 1.0.0 26 | */ 27 | @Service 28 | public class QrCodeServiceImpl implements QrCodeService { 29 | 30 | private static final Integer QR_CODE_SIZE = 200; 31 | private static final String QR_CODE_BACKGROUND_COLOR = "ffffff"; 32 | private static final String QR_CODE_FILE_FORMAT = "png"; 33 | 34 | /** 35 | * Generate QR Code according to the given request. 36 | * 37 | * @param qrCodeGenerateRequest object that is used to generate QR Code. Please, see the {@link GenerateQrCodeRequest} class for details. 38 | * @return String which corresponds to generated QR Code in base64 String. 39 | * 40 | * @author Evren Tan 41 | * @since 1.0.0 42 | */ 43 | @Override 44 | public String generateQrCodeString(GenerateQrCodeRequest qrCodeGenerateRequest) { 45 | 46 | ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream(); 47 | 48 | this.completeGenerateQrCodeRequest(qrCodeGenerateRequest); 49 | 50 | this.generateByteArrayOutputStream(byteArrayOutputStream, qrCodeGenerateRequest); 51 | 52 | return Base64.getEncoder().encodeToString(byteArrayOutputStream.toByteArray()); 53 | } 54 | 55 | /** 56 | * Generate QR Code according to the given request. 57 | * 58 | * @param qrCodeGenerateRequest object that is used to generate QR Code. Please, see the {@link GenerateQrCodeRequest} class for details. 59 | * @return byte[] which corresponds to generated QR Code. 60 | * 61 | * @author Evren Tan 62 | * @since 1.0.0 63 | */ 64 | @Override 65 | public byte[] generateQrCodeByteArray(GenerateQrCodeRequest qrCodeGenerateRequest) { 66 | this.validateQrCodeText(qrCodeGenerateRequest.getQrCodeText()); 67 | 68 | ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream(); 69 | 70 | this.completeGenerateQrCodeRequest(qrCodeGenerateRequest); 71 | 72 | this.generateByteArrayOutputStream(byteArrayOutputStream, qrCodeGenerateRequest); 73 | 74 | return byteArrayOutputStream.toByteArray(); 75 | } 76 | 77 | /** 78 | * Complete the given request with default values for size and background color if they are not set in the request. 79 | * 80 | * @param qrCodeGenerateRequest object that is used to generate QR Code. Please, see the {@link GenerateQrCodeRequest} class for details. 81 | * 82 | * @author Evren Tan 83 | * @since 1.0.0 84 | */ 85 | private void completeGenerateQrCodeRequest(GenerateQrCodeRequest qrCodeGenerateRequest) { 86 | this.validateQrCodeText(qrCodeGenerateRequest.getQrCodeText()); 87 | 88 | if (Objects.isNull(qrCodeGenerateRequest.getSize())) 89 | qrCodeGenerateRequest.setSize(QR_CODE_SIZE); 90 | 91 | if (Objects.isNull(qrCodeGenerateRequest.getBackGroundColor())) 92 | qrCodeGenerateRequest.setBackGroundColor(QR_CODE_BACKGROUND_COLOR); 93 | } 94 | 95 | /** 96 | * Generate Byte Array Output Stream according to the given request 97 | * 98 | * @param byteArrayOutputStream Byte Array Output Stream which is used to generate QR Code. 99 | * @param qrCodeGenerateRequest object that is used to generate QR Code. Please, see the {@link GenerateQrCodeRequest} class for details. 100 | * 101 | * @author Evren Tan 102 | * @since 1.0.0 103 | */ 104 | private void generateByteArrayOutputStream(ByteArrayOutputStream byteArrayOutputStream, GenerateQrCodeRequest qrCodeGenerateRequest) { 105 | QRCodeWriter qrCodeWriter = new QRCodeWriter(); 106 | 107 | try { 108 | BitMatrix bitMatrix = 109 | qrCodeWriter.encode(qrCodeGenerateRequest.getQrCodeText() 110 | , BarcodeFormat.QR_CODE 111 | , qrCodeGenerateRequest.getSize(), qrCodeGenerateRequest.getSize()); 112 | 113 | BufferedImage bufferedImage = MatrixToImageWriter.toBufferedImage(bitMatrix); 114 | 115 | ImageIO.write(bufferedImage, QR_CODE_FILE_FORMAT, byteArrayOutputStream); 116 | } catch (WriterException | IOException e) { 117 | throw new RuntimeException(e); 118 | } 119 | } 120 | 121 | private void validateQrCodeText(String qrCodeText) { 122 | if (qrCodeText.isBlank()) { 123 | throw new QrCodeTextValidationException(ExceptionMessages.QR_CODE_TEXT_VALIDATION_EXCEPTION); 124 | } 125 | } 126 | } 127 | -------------------------------------------------------------------------------- /src/main/java/evrentan/qrcodegenerator/qrcodegeneratorbackend/message/ExceptionMessages.java: -------------------------------------------------------------------------------- 1 | package evrentan.qrcodegenerator.qrcodegeneratorbackend.message; 2 | 3 | public class ExceptionMessages { 4 | 5 | public static final String QR_CODE_TEXT_VALIDATION_EXCEPTION = "Qr code text is not valid"; 6 | } 7 | -------------------------------------------------------------------------------- /src/main/java/evrentan/qrcodegenerator/qrcodegeneratorbackend/service/QrCodeService.java: -------------------------------------------------------------------------------- 1 | package evrentan.qrcodegenerator.qrcodegeneratorbackend.service; 2 | 3 | import evrentan.qrcodegenerator.qrcodegeneratorbackend.dto.GenerateQrCodeRequest; 4 | 5 | /** 6 | * QrCode Service Interface Class 7 | * 8 | * @author Evren Tan 9 | * @since 1.0.0 10 | */ 11 | public interface QrCodeService { 12 | 13 | /** 14 | * Generate QR Code according to the given request. 15 | * 16 | * @param qrCodeGenerateRequest object that is used to generate QR Code. Please, see the {@link GenerateQrCodeRequest} class for details. 17 | * @return String which corresponds to generated QR Code in base64 String. 18 | * 19 | * @author Evren Tan 20 | * @since 1.0.0 21 | */ 22 | String generateQrCodeString(GenerateQrCodeRequest qrCodeGenerateRequest); 23 | 24 | /** 25 | * Generate QR Code according to the given request. 26 | * 27 | * @param qrCodeGenerateRequest object that is used to generate QR Code. Please, see the {@link GenerateQrCodeRequest} class for details. 28 | * @return byte[] which corresponds to generated QR Code. 29 | * 30 | * @author Evren Tan 31 | * @since 1.0.0 32 | */ 33 | byte[] generateQrCodeByteArray(GenerateQrCodeRequest qrCodeGenerateRequest); 34 | } 35 | -------------------------------------------------------------------------------- /src/main/java/evrentan/qrcodegenerator/qrcodegeneratorbackend/spring/config/BufferedImageHttpConverterConfig.java: -------------------------------------------------------------------------------- 1 | package evrentan.qrcodegenerator.qrcodegeneratorbackend.spring.config; 2 | 3 | import org.springframework.context.annotation.Bean; 4 | import org.springframework.context.annotation.Configuration; 5 | import org.springframework.http.converter.BufferedImageHttpMessageConverter; 6 | import org.springframework.http.converter.HttpMessageConverter; 7 | 8 | import java.awt.image.BufferedImage; 9 | 10 | @Configuration 11 | public class BufferedImageHttpConverterConfig { 12 | 13 | @Bean 14 | public HttpMessageConverter createImageHttpMessageConverter() { 15 | return new BufferedImageHttpMessageConverter(); 16 | } 17 | } 18 | -------------------------------------------------------------------------------- /src/main/java/evrentan/qrcodegenerator/qrcodegeneratorbackend/spring/config/CommonConfig.java: -------------------------------------------------------------------------------- 1 | package evrentan.qrcodegenerator.qrcodegeneratorbackend.spring.config; 2 | 3 | import org.springframework.context.annotation.ComponentScan; 4 | import org.springframework.context.annotation.Configuration; 5 | 6 | @Configuration 7 | @ComponentScan(value = "evrentan.qrcodegenerator.qrcodegeneratorbackend") 8 | public class CommonConfig { 9 | } -------------------------------------------------------------------------------- /src/main/java/evrentan/qrcodegenerator/qrcodegeneratorbackend/spring/config/SecurityConfig.java: -------------------------------------------------------------------------------- 1 | package evrentan.qrcodegenerator.qrcodegeneratorbackend.spring.config; 2 | 3 | import evrentan.qrcodegenerator.qrcodegeneratorbackend.filter.CORSFilter; 4 | import jakarta.servlet.Filter; 5 | import org.springframework.context.annotation.Bean; 6 | import org.springframework.context.annotation.Configuration; 7 | 8 | 9 | @Configuration 10 | public class SecurityConfig { 11 | 12 | @Bean 13 | public Filter corsFilter() { 14 | return new CORSFilter(); 15 | } 16 | } 17 | -------------------------------------------------------------------------------- /src/main/java/evrentan/qrcodegenerator/qrcodegeneratorbackend/spring/config/SwaggerConfig.java: -------------------------------------------------------------------------------- 1 | package evrentan.qrcodegenerator.qrcodegeneratorbackend.spring.config; 2 | 3 | import io.swagger.v3.oas.models.ExternalDocumentation; 4 | import io.swagger.v3.oas.models.OpenAPI; 5 | import io.swagger.v3.oas.models.info.Contact; 6 | import io.swagger.v3.oas.models.info.Info; 7 | import io.swagger.v3.oas.models.info.License; 8 | import org.springdoc.core.GroupedOpenApi; 9 | import org.springframework.context.annotation.Bean; 10 | import org.springframework.context.annotation.Configuration; 11 | 12 | @Configuration 13 | public class SwaggerConfig { 14 | 15 | /** 16 | * Controller Path static value in String type. 17 | */ 18 | private static final String CONTROLLER_PATH = "evrentan.qrcodegenerator.qrcodegeneratorbackend.controller"; 19 | 20 | /** 21 | * Bean declaration for Swagger Documentation details. 22 | * 23 | * @return OpenAPI. Please, see the {@link OpenAPI} class for details. 24 | * 25 | * @author Evren Tan 26 | * @since 1.0.0 27 | */ 28 | @Bean 29 | public OpenAPI swaggerDocumentation() { 30 | Contact contact = new Contact(); 31 | contact.setName("Evren Tan"); 32 | contact.setEmail("info@evrentan.com"); 33 | contact.setUrl("https://evrentan.com"); 34 | return new OpenAPI() 35 | .info(new Info().title("Swagger UI") 36 | .description("QR Code Generator Swagger UI") 37 | .version("1.0.0") 38 | .contact(contact) 39 | .license(new License().name("Apache 2.0").url("http://springdoc.org"))) 40 | .externalDocs(new ExternalDocumentation() 41 | .description("QR Code Generator Swagger UI")); 42 | } 43 | 44 | /** 45 | * Bean declaration for Swagger documentation details for all APIs within the {@link SwaggerConfig#CONTROLLER_PATH} field. 46 | * 47 | * @return GroupedOpenAPI. Please, see the {@link GroupedOpenApi} class for details. 48 | * 49 | * @author Evren Tan 50 | * @since 1.0.0 51 | */ 52 | @Bean 53 | public GroupedOpenApi allApi() { 54 | return GroupedOpenApi.builder() 55 | .group("all-api") 56 | .packagesToScan(CONTROLLER_PATH) 57 | .build(); 58 | } 59 | 60 | /** 61 | * Bean declaration for Swagger documentation details for all APIs within the {@link SwaggerConfig#CONTROLLER_PATH} field and matching "/qrCode/**" end-points. 62 | * 63 | * @return GroupedOpenAPI. Please, see the {@link GroupedOpenApi} class for details. 64 | * 65 | * @author Evren Tan 66 | * @since 1.0.0 67 | */ 68 | @Bean 69 | public GroupedOpenApi qrCodeApi() { 70 | return GroupedOpenApi.builder() 71 | .group("qr-code-generator-api") 72 | .packagesToScan(CONTROLLER_PATH) 73 | .pathsToMatch("/qrCode/**") 74 | .build(); 75 | } 76 | } -------------------------------------------------------------------------------- /src/main/java/evrentan/qrcodegenerator/qrcodegeneratorbackend/spring/config/WebConfig.java: -------------------------------------------------------------------------------- 1 | package evrentan.qrcodegenerator.qrcodegeneratorbackend.spring.config; 2 | 3 | import org.springframework.context.annotation.Configuration; 4 | import org.springframework.web.servlet.config.annotation.EnableWebMvc; 5 | 6 | @Configuration 7 | @EnableWebMvc 8 | public class WebConfig { 9 | } 10 | -------------------------------------------------------------------------------- /src/main/java/evrentan/qrcodegenerator/qrcodegeneratorbackend/spring/spring/QrCodeGeneratorBackendApplication.java: -------------------------------------------------------------------------------- 1 | package evrentan.qrcodegenerator.qrcodegeneratorbackend.spring.spring; 2 | 3 | import evrentan.qrcodegenerator.qrcodegeneratorbackend.spring.config.*; 4 | import org.springframework.boot.SpringApplication; 5 | import org.springframework.boot.autoconfigure.SpringBootApplication; 6 | import org.springframework.context.annotation.Import; 7 | 8 | @SpringBootApplication 9 | @Import(value = {CommonConfig.class 10 | , WebConfig.class 11 | , SwaggerConfig.class 12 | , BufferedImageHttpConverterConfig.class 13 | , SecurityConfig.class}) 14 | public class QrCodeGeneratorBackendApplication { 15 | 16 | public static void main(String[] args) { 17 | SpringApplication.run(QrCodeGeneratorBackendApplication.class, args); 18 | } 19 | 20 | } 21 | -------------------------------------------------------------------------------- /src/main/resources/application.properties: -------------------------------------------------------------------------------- 1 | spring.application.name = qr-code-generator-backend 2 | server.port = 8081 3 | spring.profiles.active = dev 4 | 5 | # Actuator Settings 6 | management.server.port = 8081 7 | management.endpoints.web.exposure.include = info, health 8 | management.endpoint.health.show-components = when_authorized 9 | management.endpoint.health.show-details = when_authorized 10 | management.endpoint.caches.enabled = false 11 | management.info.env.enabled = true 12 | management.info.java.enabled = true 13 | 14 | # Actuator Info EndPoint Configuration 15 | info.application.name = QR Code Generator Backend 16 | info.application.description = QR Code Generator Backend Service implemented in Java 17 using Zxing barcode processing library. 17 | info.application.author.name = Evren Tan 18 | info.application.author.bio = A Software Craftsman 19 | info.application.author.githubProfile = https://github.com/evrentan 20 | info.application.author.webPage = https://linktr.ee/evrentan -------------------------------------------------------------------------------- /src/test/java/evrentan/qrcodegenerator/qrcodegeneratorbackend/QrCodeGeneratorBackendApplicationTests.java: -------------------------------------------------------------------------------- 1 | package evrentan.qrcodegenerator.qrcodegeneratorbackend; 2 | 3 | import evrentan.qrcodegenerator.qrcodegeneratorbackend.spring.spring.QrCodeGeneratorBackendApplication; 4 | import org.junit.jupiter.api.Assertions; 5 | import org.junit.jupiter.api.DisplayName; 6 | import org.junit.jupiter.api.Test; 7 | import org.mockito.Mock; 8 | import org.mockito.Mockito; 9 | import org.springframework.boot.test.context.SpringBootTest; 10 | import org.springframework.context.ApplicationContext; 11 | 12 | import java.util.Objects; 13 | 14 | @SpringBootTest(classes = {QrCodeGeneratorBackendApplication.class}) 15 | class QrCodeGeneratorBackendApplicationTests { 16 | 17 | @Mock 18 | private ApplicationContext applicationContext; 19 | 20 | @Test 21 | @DisplayName("Context Load Testing") 22 | void contextLoads() { 23 | Mockito.when(Objects.nonNull(applicationContext.getBean(QrCodeGeneratorBackendApplication.class))).thenReturn(true); 24 | Assertions.assertTrue(Objects.nonNull(applicationContext.getBean(QrCodeGeneratorBackendApplication.class))); 25 | } 26 | 27 | } 28 | -------------------------------------------------------------------------------- /system.properties: -------------------------------------------------------------------------------- 1 | java.runtime.version = 17 --------------------------------------------------------------------------------