├── .gitignore ├── COPYING.LESSER.txt ├── COPYING.txt ├── README └── project ├── .classpath ├── .project ├── .settings ├── org.eclipse.jdt.core.prefs └── org.maven.ide.eclipse.prefs ├── pom.xml └── src ├── main ├── java │ └── com │ │ └── tek271 │ │ └── reverseProxy │ │ ├── config │ │ ├── Config.java │ │ └── Properties.java │ │ ├── model │ │ ├── Mapping.java │ │ ├── Mappings.java │ │ └── RegexPair.java │ │ ├── servlet │ │ ├── ContentTranslator.java │ │ ├── ContentType.java │ │ ├── ContentUtils.java │ │ └── ProxyFilter.java │ │ ├── text │ │ ├── TagTranslator.java │ │ ├── TextTranslator.java │ │ └── UrlMapper.java │ │ └── utils │ │ ├── FileTools.java │ │ ├── PropertiesFile.java │ │ ├── RegexFlagsEnum.java │ │ ├── RegexTools.java │ │ ├── TextTools.java │ │ ├── Tuple2.java │ │ └── Tuple3.java ├── resources │ ├── log4j.properties │ └── reverseProxy.properties └── webapp │ ├── WEB-INF │ └── web.xml │ └── index.jsp └── test ├── java └── com │ └── tek271 │ └── reverseProxy │ ├── config │ └── PropertiesTest.java │ ├── model │ ├── MappingTest.java │ ├── MappingsTest.java │ └── ModelFactory.java │ ├── text │ ├── TagTranslatorTest.java │ ├── TextTranslatorTest.java │ └── UrlMapperTest.java │ └── utils │ ├── PropertiesFileTest.java │ ├── RegexToolsTest.java │ └── TextToolsTest.java └── resources ├── problem.txt └── reverseProxy.test.properties /.gitignore: -------------------------------------------------------------------------------- 1 | *.class 2 | *.jar 3 | *.log 4 | .DS_Store? 5 | 6 | target/ 7 | -------------------------------------------------------------------------------- /COPYING.LESSER.txt: -------------------------------------------------------------------------------- 1 | GNU LESSER 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 | 9 | This version of the GNU Lesser General Public License incorporates 10 | the terms and conditions of version 3 of the GNU General Public 11 | License, supplemented by the additional permissions listed below. 12 | 13 | 0. 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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 | -------------------------------------------------------------------------------- /README: -------------------------------------------------------------------------------- 1 | This program uses GNU LGPL. 2 | Copyright © Abdul Habra 2011 3 | ahabra@yahoo.com 4 | 5 | 6 | INTRODUCTION 7 | ------------ 8 | Definition of reverse proxy (from Wikipedia): 9 | "A reverse proxy is a type of proxy server that retrieves resources on behalf of a 10 | client from one or more servers. These resources are then returned to the client as 11 | though it originated from the reverse proxy itself." 12 | 13 | For example you can configure a reverse proxy such that when people go to 14 | www.my_personal_domain.com the proxy will show them results from google.com 15 | 16 | (assuming that you own my_personal_domain.com) 17 | 18 | The program is written in Java and is deployed as a standard WAR file to any 19 | servlet container, e.g. Tomcat. 20 | 21 | 22 | HOW TO BUILD 23 | ------------ 24 | The code is in the "project" directory as a Maven project. 25 | To build the project, run this command: 26 | 27 | mvn clean package 28 | 29 | This will produce target/rp.war 30 | You can deploy rp.war to and Java web server 31 | 32 | 33 | CONFIGURATION 34 | ------------- 35 | To configure the URLs for the reverse proxy, edit the file: 36 | 37 | project/src/main/resources/reverseProxy.properties 38 | 39 | 40 | -------------------------------------------------------------------------------- /project/.classpath: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | -------------------------------------------------------------------------------- /project/.project: -------------------------------------------------------------------------------- 1 | 2 | 3 | rp 4 | 5 | 6 | 7 | 8 | 9 | org.eclipse.jdt.core.javabuilder 10 | 11 | 12 | 13 | 14 | org.maven.ide.eclipse.maven2Builder 15 | 16 | 17 | 18 | 19 | 20 | org.eclipse.jdt.core.javanature 21 | org.maven.ide.eclipse.maven2Nature 22 | 23 | 24 | -------------------------------------------------------------------------------- /project/.settings/org.eclipse.jdt.core.prefs: -------------------------------------------------------------------------------- 1 | #Mon Mar 14 01:30:20 EDT 2011 2 | eclipse.preferences.version=1 3 | org.eclipse.jdt.core.compiler.codegen.inlineJsrBytecode=enabled 4 | org.eclipse.jdt.core.compiler.codegen.targetPlatform=1.5 5 | org.eclipse.jdt.core.compiler.codegen.unusedLocal=preserve 6 | org.eclipse.jdt.core.compiler.compliance=1.5 7 | org.eclipse.jdt.core.compiler.debug.lineNumber=generate 8 | org.eclipse.jdt.core.compiler.debug.localVariable=generate 9 | org.eclipse.jdt.core.compiler.debug.sourceFile=generate 10 | org.eclipse.jdt.core.compiler.problem.assertIdentifier=error 11 | org.eclipse.jdt.core.compiler.problem.enumIdentifier=error 12 | org.eclipse.jdt.core.compiler.problem.forbiddenReference=warning 13 | org.eclipse.jdt.core.compiler.source=1.5 14 | -------------------------------------------------------------------------------- /project/.settings/org.maven.ide.eclipse.prefs: -------------------------------------------------------------------------------- 1 | #Sun Mar 13 20:01:54 EDT 2011 2 | activeProfiles= 3 | eclipse.preferences.version=1 4 | fullBuildGoals=process-test-resources 5 | includeModules=false 6 | resolveWorkspaceProjects=true 7 | resourceFilterGoals=process-resources resources\:testResources 8 | skipCompilerPlugin=true 9 | version=1 10 | -------------------------------------------------------------------------------- /project/pom.xml: -------------------------------------------------------------------------------- 1 | 3 | 4.0.0 4 | 5 | com.tek271 6 | rp 7 | Reverse Proxy 8 | 9 | war 10 | 1.0-SNAPSHOT 11 | rp 12 | http://maven.apache.org 13 | 14 | 15 | rp 16 | 17 | 18 | org.apache.maven.plugins 19 | maven-compiler-plugin 20 | 2.3.2 21 | 22 | 1.5 23 | 1.5 24 | 25 | 26 | 27 | 28 | org.codehaus.mojo 29 | tomcat-maven-plugin 30 | 1.1 31 | 32 | 33 | 34 | 35 | 36 | 37 | true 38 | src/main/resources 39 | 40 | 41 | 42 | 43 | 44 | 45 | dev 46 | 47 | true 48 | 49 | 50 | localhost:8080 51 | 52 | 53 | 54 | 55 | prod 56 | 57 | false 58 | 59 | 60 | proxyDomain.com 61 | 62 | 63 | 64 | 65 | 66 | 67 | 68 | junit 69 | junit 70 | 4.8.2 71 | test 72 | 73 | 74 | 75 | javax.servlet 76 | servlet-api 77 | 2.3 78 | provided 79 | 80 | 81 | 82 | log4j 83 | log4j 84 | 1.2.16 85 | 86 | 87 | 88 | com.google.guava 89 | guava 90 | r07 91 | 92 | 93 | 94 | commons-configuration 95 | commons-configuration 96 | 1.6 97 | 98 | 99 | 100 | commons-lang 101 | commons-lang 102 | 2.5 103 | 104 | 105 | 106 | org.apache.httpcomponents 107 | httpclient 108 | 4.1 109 | 110 | 111 | 112 | org.apache.httpcomponents 113 | httpmime 114 | 4.1 115 | 116 | 117 | 118 | commons-io 119 | commons-io 120 | 2.0.1 121 | 122 | 123 | 124 | 125 | 126 | -------------------------------------------------------------------------------- /project/src/main/java/com/tek271/reverseProxy/config/Config.java: -------------------------------------------------------------------------------- 1 | /* 2 | This file is part of Tek271 Reverse Proxy Server. 3 | 4 | Tek271 Reverse Proxy Server is free software: you can redistribute it and/or modify 5 | it under the terms of the GNU Lesser General Public License as published by 6 | the Free Software Foundation, either version 3 of the License, or 7 | (at your option) any later version. 8 | 9 | Tek271 Reverse Proxy Server is distributed in the hope that it will be useful, 10 | but WITHOUT ANY WARRANTY; without even the implied warranty of 11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 12 | GNU Lesser General Public License for more details. 13 | 14 | You should have received a copy of the GNU Lesser General Public License 15 | along with Tek271 Reverse Proxy Server. If not, see http://www.gnu.org/licenses/ 16 | */ 17 | package com.tek271.reverseProxy.config; 18 | 19 | import com.tek271.reverseProxy.model.Mappings; 20 | 21 | public enum Config { 22 | singleton; 23 | 24 | public final Mappings mappings; 25 | public final Properties properties; 26 | 27 | private Config() { 28 | properties= new Properties(); 29 | mappings= properties.mappings; 30 | } 31 | 32 | } 33 | -------------------------------------------------------------------------------- /project/src/main/java/com/tek271/reverseProxy/config/Properties.java: -------------------------------------------------------------------------------- 1 | /* 2 | This file is part of Tek271 Reverse Proxy Server. 3 | 4 | Tek271 Reverse Proxy Server is free software: you can redistribute it and/or modify 5 | it under the terms of the GNU Lesser General Public License as published by 6 | the Free Software Foundation, either version 3 of the License, or 7 | (at your option) any later version. 8 | 9 | Tek271 Reverse Proxy Server is distributed in the hope that it will be useful, 10 | but WITHOUT ANY WARRANTY; without even the implied warranty of 11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 12 | GNU Lesser General Public License for more details. 13 | 14 | You should have received a copy of the GNU Lesser General Public License 15 | along with Tek271 Reverse Proxy Server. If not, see http://www.gnu.org/licenses/ 16 | */ 17 | package com.tek271.reverseProxy.config; 18 | 19 | import com.google.common.annotations.VisibleForTesting; 20 | import com.tek271.reverseProxy.model.*; 21 | import com.tek271.reverseProxy.utils.PropertiesFile; 22 | 23 | 24 | public class Properties { 25 | private static final String FILE= "reverseProxy.properties"; 26 | public final Mappings mappings; 27 | 28 | public Properties() { 29 | PropertiesFile propertiesFile= new PropertiesFile(FILE, true); 30 | mappings= readMappings(propertiesFile); 31 | } 32 | 33 | @VisibleForTesting 34 | static Mappings readMappings(PropertiesFile propertiesFile) { 35 | Mappings mappings= new Mappings(); 36 | PropertiesFile subset = propertiesFile.subset("mapping."); 37 | 38 | for(String key: subset.keys()) { 39 | String value = subset.getString(key); 40 | mappings.add( new Mapping(value) ); 41 | } 42 | 43 | return mappings; 44 | } 45 | 46 | 47 | } 48 | -------------------------------------------------------------------------------- /project/src/main/java/com/tek271/reverseProxy/model/Mapping.java: -------------------------------------------------------------------------------- 1 | /* 2 | This file is part of Tek271 Reverse Proxy Server. 3 | 4 | Tek271 Reverse Proxy Server is free software: you can redistribute it and/or modify 5 | it under the terms of the GNU Lesser General Public License as published by 6 | the Free Software Foundation, either version 3 of the License, or 7 | (at your option) any later version. 8 | 9 | Tek271 Reverse Proxy Server is distributed in the hope that it will be useful, 10 | but WITHOUT ANY WARRANTY; without even the implied warranty of 11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 12 | GNU Lesser General Public License for more details. 13 | 14 | You should have received a copy of the GNU Lesser General Public License 15 | along with Tek271 Reverse Proxy Server. If not, see http://www.gnu.org/licenses/ 16 | */ 17 | package com.tek271.reverseProxy.model; 18 | 19 | import static org.apache.commons.lang.StringUtils.*; 20 | 21 | import java.util.List; 22 | 23 | import com.google.common.base.*; 24 | import com.google.common.collect.Lists; 25 | import static com.google.common.base.Preconditions.*; 26 | 27 | public class Mapping { 28 | public final String hiddenDomain; 29 | public final String proxyDomain; 30 | public final String proxyResource; 31 | public final String proxy; 32 | 33 | public Mapping(String mapping) { 34 | checkArgument(isNotBlank(mapping), "mapping must contain a value"); 35 | mapping= trimToEmpty(mapping); 36 | List items= Lists.newArrayList(Splitter.on(',').trimResults().split(mapping)); 37 | checkArgument(items.size()==3, "mappings must have 3 comma-separated values"); 38 | 39 | hiddenDomain= items.get(0); 40 | proxyDomain= items.get(1); 41 | proxyResource= items.get(2); 42 | proxy= proxyDomain + proxyResource; 43 | } 44 | 45 | private static final String SEP = "://"; 46 | 47 | public String mapProxyToHidden(String proxyUrl) { 48 | String path = extractPath(proxyUrl, proxyDomain, proxyResource); 49 | return extractProtocol(proxyUrl) + SEP + hiddenDomain + path; 50 | } 51 | 52 | public String mapHiddenToProxy(String hiddenUrl) { 53 | String path = extractPath(hiddenUrl, hiddenDomain, ""); 54 | return extractProtocol(hiddenUrl) + SEP + proxy + path; 55 | } 56 | 57 | private static String extractProtocol(String url) { 58 | return substringBefore(url, SEP); 59 | } 60 | 61 | private String extractPath(String url, String domain, String resource) { 62 | String prefix= domain + resource; 63 | return substringAfter(url, prefix); 64 | } 65 | 66 | 67 | } 68 | -------------------------------------------------------------------------------- /project/src/main/java/com/tek271/reverseProxy/model/Mappings.java: -------------------------------------------------------------------------------- 1 | /* 2 | This file is part of Tek271 Reverse Proxy Server. 3 | 4 | Tek271 Reverse Proxy Server is free software: you can redistribute it and/or modify 5 | it under the terms of the GNU Lesser General Public License as published by 6 | the Free Software Foundation, either version 3 of the License, or 7 | (at your option) any later version. 8 | 9 | Tek271 Reverse Proxy Server is distributed in the hope that it will be useful, 10 | but WITHOUT ANY WARRANTY; without even the implied warranty of 11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 12 | GNU Lesser General Public License for more details. 13 | 14 | You should have received a copy of the GNU Lesser General Public License 15 | along with Tek271 Reverse Proxy Server. If not, see http://www.gnu.org/licenses/ 16 | */ 17 | package com.tek271.reverseProxy.model; 18 | 19 | import static org.apache.commons.lang.StringUtils.*; 20 | 21 | import java.util.ArrayList; 22 | 23 | 24 | public class Mappings extends ArrayList { 25 | 26 | private static final long serialVersionUID = 1L; 27 | 28 | 29 | public static Mappings create(Mapping...mappings) { 30 | Mappings r= new Mappings(); 31 | for (Mapping mapping: mappings) { 32 | r.add(mapping); 33 | } 34 | return r; 35 | } 36 | 37 | private static final String SEP = "://"; 38 | 39 | 40 | public Mapping findByProxyUrl(String proxyUrl) { 41 | String noProtocol= substringAfter(proxyUrl, SEP); 42 | for (Mapping mapping: this) { 43 | if (startsWithIgnoreCase(noProtocol, mapping.proxy)) return mapping; 44 | } 45 | return null; 46 | } 47 | 48 | public Mapping findByHiddenUrl(String hiddenUrl) { 49 | String noProtocol= substringAfter(hiddenUrl, SEP); 50 | for (Mapping mapping: this) { 51 | if (startsWithIgnoreCase(noProtocol, mapping.hiddenDomain)) return mapping; 52 | } 53 | return null; 54 | } 55 | 56 | 57 | } 58 | -------------------------------------------------------------------------------- /project/src/main/java/com/tek271/reverseProxy/model/RegexPair.java: -------------------------------------------------------------------------------- 1 | /* 2 | This file is part of Tek271 Reverse Proxy Server. 3 | 4 | Tek271 Reverse Proxy Server is free software: you can redistribute it and/or modify 5 | it under the terms of the GNU Lesser General Public License as published by 6 | the Free Software Foundation, either version 3 of the License, or 7 | (at your option) any later version. 8 | 9 | Tek271 Reverse Proxy Server is distributed in the hope that it will be useful, 10 | but WITHOUT ANY WARRANTY; without even the implied warranty of 11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 12 | GNU Lesser General Public License for more details. 13 | 14 | You should have received a copy of the GNU Lesser General Public License 15 | along with Tek271 Reverse Proxy Server. If not, see http://www.gnu.org/licenses/ 16 | */ 17 | package com.tek271.reverseProxy.model; 18 | 19 | import java.util.regex.Pattern; 20 | 21 | import com.google.common.base.Objects; 22 | 23 | public class RegexPair { 24 | 25 | public final Pattern tagPattern; 26 | public final Pattern attributePattern; 27 | 28 | private final String tagRegex; 29 | private final String attributeRegex; 30 | 31 | private RegexPair(String tagRegex, String attributeRegex) { 32 | tagPattern= Pattern.compile(tagRegex, Pattern.CASE_INSENSITIVE); 33 | attributePattern= Pattern.compile(attributeRegex, Pattern.CASE_INSENSITIVE); 34 | 35 | this.tagRegex= tagRegex; 36 | this.attributeRegex= attributeRegex; 37 | } 38 | 39 | public static RegexPair pair(String tagRegex, String attributeRegex) { 40 | return new RegexPair(tagRegex, attributeRegex); 41 | } 42 | 43 | @Override 44 | public String toString() { 45 | return Objects.toStringHelper(this) 46 | .add("tagRegex", tagRegex) 47 | .add("attributeRegex", attributeRegex) 48 | .toString(); 49 | } 50 | } 51 | -------------------------------------------------------------------------------- /project/src/main/java/com/tek271/reverseProxy/servlet/ContentTranslator.java: -------------------------------------------------------------------------------- 1 | /* 2 | This file is part of Tek271 Reverse Proxy Server. 3 | 4 | Tek271 Reverse Proxy Server is free software: you can redistribute it and/or modify 5 | it under the terms of the GNU Lesser General Public License as published by 6 | the Free Software Foundation, either version 3 of the License, or 7 | (at your option) any later version. 8 | 9 | Tek271 Reverse Proxy Server is distributed in the hope that it will be useful, 10 | but WITHOUT ANY WARRANTY; without even the implied warranty of 11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 12 | GNU Lesser General Public License for more details. 13 | 14 | You should have received a copy of the GNU Lesser General Public License 15 | along with Tek271 Reverse Proxy Server. If not, see http://www.gnu.org/licenses/ 16 | */ 17 | package com.tek271.reverseProxy.servlet; 18 | 19 | import javax.servlet.ServletResponse; 20 | 21 | import org.apache.http.HttpEntity; 22 | 23 | import com.tek271.reverseProxy.model.Mapping; 24 | import com.tek271.reverseProxy.text.*; 25 | 26 | public class ContentTranslator { 27 | 28 | private final Mapping mapping; 29 | private final String newUrl; 30 | 31 | public ContentTranslator(Mapping mapping, String newUrl) { 32 | this.mapping= mapping; 33 | this.newUrl= newUrl; 34 | } 35 | 36 | public void translate(HttpEntity entity, ServletResponse response) { 37 | if (entity==null) return; 38 | 39 | ContentType contentType= new ContentType(entity.getContentType(), newUrl); 40 | if (contentType.isBinary) { 41 | ContentUtils.copyBinary(entity, response); 42 | return; 43 | } 44 | String text = ContentUtils.getContentText(entity, contentType.charset); 45 | if (contentType.isJavaScript) { 46 | ContentUtils.copyText(text, response, contentType); 47 | return; 48 | } 49 | 50 | text= translateText(text); 51 | ContentUtils.copyText(text, response, contentType); 52 | } 53 | 54 | private String translateText(String text) { 55 | TextTranslator textTranslator= new TextTranslator(mapping); 56 | return textTranslator.translate(text); 57 | } 58 | 59 | 60 | } 61 | -------------------------------------------------------------------------------- /project/src/main/java/com/tek271/reverseProxy/servlet/ContentType.java: -------------------------------------------------------------------------------- 1 | /* 2 | This file is part of Tek271 Reverse Proxy Server. 3 | 4 | Tek271 Reverse Proxy Server is free software: you can redistribute it and/or modify 5 | it under the terms of the GNU Lesser General Public License as published by 6 | the Free Software Foundation, either version 3 of the License, or 7 | (at your option) any later version. 8 | 9 | Tek271 Reverse Proxy Server is distributed in the hope that it will be useful, 10 | but WITHOUT ANY WARRANTY; without even the implied warranty of 11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 12 | GNU Lesser General Public License for more details. 13 | 14 | You should have received a copy of the GNU Lesser General Public License 15 | along with Tek271 Reverse Proxy Server. If not, see http://www.gnu.org/licenses/ 16 | */ 17 | package com.tek271.reverseProxy.servlet; 18 | 19 | import static org.apache.commons.lang.StringUtils.*; 20 | import org.apache.http.Header; 21 | 22 | public class ContentType { 23 | private static final String DEFAULT_CHARSET= "UTF-8"; 24 | 25 | public final String value; 26 | public final String charset; 27 | public final boolean isText; 28 | public final boolean isBinary; 29 | public final boolean isJavaScript; 30 | public final String url; 31 | 32 | 33 | public ContentType(Header header, String url) { 34 | value= trimToEmpty( header.getValue() ); 35 | charset= extractCharset(value); 36 | isText= isText(value); 37 | isBinary= !isText; 38 | this.url= url; 39 | 40 | String path= extractPath(url); 41 | isJavaScript= isJavaScript(path); 42 | } 43 | 44 | private static String extractCharset(String value) { 45 | value= lowerCase( trimToEmpty(value)); 46 | String cs= substringAfter(value, "charset="); 47 | if (isEmpty(cs)) return DEFAULT_CHARSET; 48 | 49 | cs= trimToEmpty(cs); 50 | cs= trim(substringBefore(cs, ";")); 51 | if (isEmpty(cs)) cs= DEFAULT_CHARSET; 52 | return cs; 53 | } 54 | 55 | private static boolean isText(String value) { 56 | if (containsIgnoreCase(value, "image")) return false; 57 | return true; 58 | } 59 | 60 | private static boolean isJavaScript(String path) { 61 | return endsWithIgnoreCase(path, ".js"); 62 | } 63 | 64 | private static String extractPath(String url) { 65 | return substringBefore(url, "?"); 66 | } 67 | 68 | } 69 | -------------------------------------------------------------------------------- /project/src/main/java/com/tek271/reverseProxy/servlet/ContentUtils.java: -------------------------------------------------------------------------------- 1 | /* 2 | This file is part of Tek271 Reverse Proxy Server. 3 | 4 | Tek271 Reverse Proxy Server is free software: you can redistribute it and/or modify 5 | it under the terms of the GNU Lesser General Public License as published by 6 | the Free Software Foundation, either version 3 of the License, or 7 | (at your option) any later version. 8 | 9 | Tek271 Reverse Proxy Server is distributed in the hope that it will be useful, 10 | but WITHOUT ANY WARRANTY; without even the implied warranty of 11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 12 | GNU Lesser General Public License for more details. 13 | 14 | You should have received a copy of the GNU Lesser General Public License 15 | along with Tek271 Reverse Proxy Server. If not, see http://www.gnu.org/licenses/ 16 | */ 17 | package com.tek271.reverseProxy.servlet; 18 | 19 | import java.io.IOException; 20 | import java.io.InputStream; 21 | 22 | import javax.servlet.ServletOutputStream; 23 | import javax.servlet.ServletResponse; 24 | 25 | import org.apache.commons.io.IOUtils; 26 | import org.apache.http.HttpEntity; 27 | 28 | import com.google.common.base.Throwables; 29 | 30 | public class ContentUtils { 31 | 32 | public static void copyBinary(HttpEntity entity, ServletResponse response) { 33 | try { 34 | InputStream content = entity.getContent(); 35 | ServletOutputStream outputStream = response.getOutputStream(); 36 | IOUtils.copy(content, outputStream); 37 | } catch (IOException e) { 38 | Throwables.propagate(e); 39 | } 40 | } 41 | 42 | public static void copyText(String text, ServletResponse response, ContentType contentType) { 43 | //response.setCharacterEncoding(contentType.charset); 44 | response.setContentType(contentType.value); 45 | try { 46 | response.getWriter().print(text); 47 | } catch (IOException e) { 48 | Throwables.propagate(e); 49 | } 50 | } 51 | 52 | public static String getContentText(HttpEntity entity, String charset) { 53 | try { 54 | return IOUtils.toString(entity.getContent(), charset); 55 | } catch (IOException e) { 56 | Throwables.propagate(e); 57 | return null; 58 | } 59 | } 60 | 61 | } 62 | -------------------------------------------------------------------------------- /project/src/main/java/com/tek271/reverseProxy/servlet/ProxyFilter.java: -------------------------------------------------------------------------------- 1 | /* 2 | This file is part of Tek271 Reverse Proxy Server. 3 | 4 | Tek271 Reverse Proxy Server is free software: you can redistribute it and/or modify 5 | it under the terms of the GNU Lesser General Public License as published by 6 | the Free Software Foundation, either version 3 of the License, or 7 | (at your option) any later version. 8 | 9 | Tek271 Reverse Proxy Server is distributed in the hope that it will be useful, 10 | but WITHOUT ANY WARRANTY; without even the implied warranty of 11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 12 | GNU Lesser General Public License for more details. 13 | 14 | You should have received a copy of the GNU Lesser General Public License 15 | along with Tek271 Reverse Proxy Server. If not, see http://www.gnu.org/licenses/ 16 | */ 17 | package com.tek271.reverseProxy.servlet; 18 | 19 | import java.io.IOException; 20 | 21 | import javax.servlet.*; 22 | import javax.servlet.http.*; 23 | 24 | import org.apache.http.*; 25 | import org.apache.http.client.*; 26 | import org.apache.http.client.methods.HttpGet; 27 | import org.apache.http.impl.client.DefaultHttpClient; 28 | 29 | import com.tek271.reverseProxy.model.Mapping; 30 | import com.tek271.reverseProxy.text.UrlMapper; 31 | import com.tek271.reverseProxy.utils.Tuple2; 32 | 33 | public class ProxyFilter implements Filter { 34 | 35 | public void init(FilterConfig filterConfig) throws ServletException { 36 | } 37 | 38 | public void destroy() { 39 | } 40 | 41 | public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) 42 | throws IOException, ServletException { 43 | if (!isHttp(request, response)) return; 44 | 45 | Tuple2 mapped = mapUrlProxyToHidden(request); 46 | if (mapped.isNull()) { 47 | chain.doFilter(request, response); 48 | return; 49 | } 50 | 51 | executeRequest(response, mapped.e1, mapped.e2); 52 | } 53 | 54 | private static boolean isHttp(ServletRequest request, ServletResponse response) { 55 | return (request instanceof HttpServletRequest) && (response instanceof HttpServletResponse); 56 | } 57 | 58 | private static Tuple2 mapUrlProxyToHidden(ServletRequest request) { 59 | String oldUrl = ((HttpServletRequest)request).getRequestURL().toString(); 60 | return UrlMapper.mapFullUrlProxyToHidden(oldUrl); 61 | } 62 | 63 | private static void executeRequest(ServletResponse response, Mapping mapping, String newUrl) 64 | throws IOException, ClientProtocolException { 65 | //System.out.println(newUrl); 66 | HttpClient httpclient = new DefaultHttpClient(); 67 | HttpGet httpget = new HttpGet(newUrl); 68 | HttpResponse r = httpclient.execute(httpget); 69 | HttpEntity entity = r.getEntity(); 70 | 71 | ContentTranslator contentTranslator= new ContentTranslator(mapping, newUrl); 72 | contentTranslator.translate(entity, response); 73 | } 74 | 75 | 76 | } 77 | -------------------------------------------------------------------------------- /project/src/main/java/com/tek271/reverseProxy/text/TagTranslator.java: -------------------------------------------------------------------------------- 1 | /* 2 | This file is part of Tek271 Reverse Proxy Server. 3 | 4 | Tek271 Reverse Proxy Server is free software: you can redistribute it and/or modify 5 | it under the terms of the GNU Lesser General Public License as published by 6 | the Free Software Foundation, either version 3 of the License, or 7 | (at your option) any later version. 8 | 9 | Tek271 Reverse Proxy Server is distributed in the hope that it will be useful, 10 | but WITHOUT ANY WARRANTY; without even the implied warranty of 11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 12 | GNU Lesser General Public License for more details. 13 | 14 | You should have received a copy of the GNU Lesser General Public License 15 | along with Tek271 Reverse Proxy Server. If not, see http://www.gnu.org/licenses/ 16 | */ 17 | package com.tek271.reverseProxy.text; 18 | 19 | import static org.apache.commons.lang.StringUtils.defaultString; 20 | import static org.apache.commons.lang.StringUtils.left; 21 | import static org.apache.commons.lang.StringUtils.substring; 22 | import static org.apache.commons.lang.StringUtils.substringAfter; 23 | import static org.apache.commons.lang.StringUtils.substringBetween; 24 | 25 | import java.util.List; 26 | import java.util.regex.Pattern; 27 | 28 | import com.google.common.annotations.VisibleForTesting; 29 | import com.tek271.reverseProxy.model.Mapping; 30 | import com.tek271.reverseProxy.utils.*; 31 | import static com.tek271.reverseProxy.utils.TextTools.*; 32 | 33 | public class TagTranslator { 34 | 35 | private final UrlMapper urlMapper; 36 | private final Pattern tagPattern; 37 | private final Pattern attributePattern; 38 | 39 | public TagTranslator(Mapping mapping, Pattern tagPattern, Pattern attributePattern) { 40 | this.urlMapper= new UrlMapper(mapping); 41 | this.tagPattern= tagPattern; 42 | this.attributePattern= attributePattern; 43 | } 44 | 45 | public String translate(String text) { 46 | StringBuilder sb= new StringBuilder(); 47 | List> matches = RegexTools.findAll(tagPattern, text, false); 48 | 49 | int lastEnd=0; 50 | for (Tuple3 match : matches) { 51 | sb.append(text.substring(lastEnd, match.e1)); 52 | sb.append( translateTag(match.e3) ); 53 | lastEnd= match.e2; 54 | } 55 | 56 | String remaining = substring(text, lastEnd); 57 | sb.append(defaultString(remaining)); 58 | return sb.toString(); 59 | } 60 | 61 | @VisibleForTesting 62 | String translateTag(String tag) { 63 | Tuple3 value = attributeValue(tag); 64 | if (value.isNull()) return tag; 65 | 66 | String newUrl = urlMapper.mapContentUrl(value.e3); 67 | return left(tag, value.e1) + dquoteAround(newUrl) + substring(tag, value.e2); 68 | } 69 | 70 | @VisibleForTesting 71 | Tuple3 attributeValue(String tag) { 72 | String normalized= TextTools.removeControlChars(tag); 73 | List> matches = RegexTools.findAll(attributePattern, normalized, true); 74 | if (matches.isEmpty()) return Tuple3.nil(); 75 | 76 | Tuple3 match = matches.get(0); 77 | String value = match.e3; 78 | char quote= value.charAt(0); 79 | if (isQuote(quote)) { 80 | value= extractBetweenQuotes(value, quote); 81 | } 82 | return Tuple3.tuple3(match.e1, match.e2, value); 83 | } 84 | 85 | private static String extractBetweenQuotes(String value, char quote) { 86 | String q = String.valueOf(quote); 87 | String v= substringBetween(value, q); 88 | if (v==null) v= substringAfter(value, q); 89 | return v; 90 | } 91 | 92 | } 93 | -------------------------------------------------------------------------------- /project/src/main/java/com/tek271/reverseProxy/text/TextTranslator.java: -------------------------------------------------------------------------------- 1 | /* 2 | This file is part of Tek271 Reverse Proxy Server. 3 | 4 | Tek271 Reverse Proxy Server is free software: you can redistribute it and/or modify 5 | it under the terms of the GNU Lesser General Public License as published by 6 | the Free Software Foundation, either version 3 of the License, or 7 | (at your option) any later version. 8 | 9 | Tek271 Reverse Proxy Server is distributed in the hope that it will be useful, 10 | but WITHOUT ANY WARRANTY; without even the implied warranty of 11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 12 | GNU Lesser General Public License for more details. 13 | 14 | You should have received a copy of the GNU Lesser General Public License 15 | along with Tek271 Reverse Proxy Server. If not, see http://www.gnu.org/licenses/ 16 | */ 17 | package com.tek271.reverseProxy.text; 18 | 19 | import java.util.List; 20 | 21 | import com.google.common.collect.*; 22 | import com.tek271.reverseProxy.model.*; 23 | import static com.tek271.reverseProxy.model.RegexPair.*; 24 | 25 | public class TextTranslator { 26 | 27 | private static final RegexPair ANCHOR= pair("<[aA]\\b(\"[^\"]*\"|'[^']*'|[^'\">])*>", // match tags 28 | "\\bhref\\b\\s*=\\s*(\\S*?)[\\s>]"); // match href attribute value 29 | 30 | private static final RegexPair IMAGE= pair("])*>", // match tags 31 | "\\bsrc\\b\\s*=\\s*(\\S*?)[\\s>]"); // match src attribute value 32 | 33 | private static final RegexPair LINK= pair("])*>", // match tags 34 | "\\bhref\\b\\s*=\\s*(\\S*?)[\\s>]"); // match href attribute value 35 | 36 | private static final RegexPair SCRIPT= pair("])*>", // match