1*c993ae02SXianjun Jiao GNU AFFERO GENERAL PUBLIC LICENSE 2*c993ae02SXianjun Jiao Version 3, 19 November 2007 3*c993ae02SXianjun Jiao 4*c993ae02SXianjun Jiao Copyright (C) 2007 Free Software Foundation, Inc. <http://fsf.org/> 5*c993ae02SXianjun Jiao Everyone is permitted to copy and distribute verbatim copies 6*c993ae02SXianjun Jiao of this license document, but changing it is not allowed. 7*c993ae02SXianjun Jiao 8*c993ae02SXianjun Jiao Preamble 9*c993ae02SXianjun Jiao 10*c993ae02SXianjun Jiao The GNU Affero General Public License is a free, copyleft license for 11*c993ae02SXianjun Jiaosoftware and other kinds of works, specifically designed to ensure 12*c993ae02SXianjun Jiaocooperation with the community in the case of network server software. 13*c993ae02SXianjun Jiao 14*c993ae02SXianjun Jiao The licenses for most software and other practical works are designed 15*c993ae02SXianjun Jiaoto take away your freedom to share and change the works. By contrast, 16*c993ae02SXianjun Jiaoour General Public Licenses are intended to guarantee your freedom to 17*c993ae02SXianjun Jiaoshare and change all versions of a program--to make sure it remains free 18*c993ae02SXianjun Jiaosoftware for all its users. 19*c993ae02SXianjun Jiao 20*c993ae02SXianjun Jiao When we speak of free software, we are referring to freedom, not 21*c993ae02SXianjun Jiaoprice. Our General Public Licenses are designed to make sure that you 22*c993ae02SXianjun Jiaohave the freedom to distribute copies of free software (and charge for 23*c993ae02SXianjun Jiaothem if you wish), that you receive source code or can get it if you 24*c993ae02SXianjun Jiaowant it, that you can change the software or use pieces of it in new 25*c993ae02SXianjun Jiaofree programs, and that you know you can do these things. 26*c993ae02SXianjun Jiao 27*c993ae02SXianjun Jiao Developers that use our General Public Licenses protect your rights 28*c993ae02SXianjun Jiaowith two steps: (1) assert copyright on the software, and (2) offer 29*c993ae02SXianjun Jiaoyou this License which gives you legal permission to copy, distribute 30*c993ae02SXianjun Jiaoand/or modify the software. 31*c993ae02SXianjun Jiao 32*c993ae02SXianjun Jiao A secondary benefit of defending all users' freedom is that 33*c993ae02SXianjun Jiaoimprovements made in alternate versions of the program, if they 34*c993ae02SXianjun Jiaoreceive widespread use, become available for other developers to 35*c993ae02SXianjun Jiaoincorporate. 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Therefore, public use of a modified version, on 47*c993ae02SXianjun Jiaoa publicly accessible server, gives the public access to the source 48*c993ae02SXianjun Jiaocode of the modified version. 49*c993ae02SXianjun Jiao 50*c993ae02SXianjun Jiao An older license, called the Affero General Public License and 51*c993ae02SXianjun Jiaopublished by Affero, was designed to accomplish similar goals. This is 52*c993ae02SXianjun Jiaoa different license, not a version of the Affero GPL, but Affero has 53*c993ae02SXianjun Jiaoreleased a new version of the Affero GPL which permits relicensing under 54*c993ae02SXianjun Jiaothis license. 55*c993ae02SXianjun Jiao 56*c993ae02SXianjun Jiao The precise terms and conditions for copying, distribution and 57*c993ae02SXianjun Jiaomodification follow. 58*c993ae02SXianjun Jiao 59*c993ae02SXianjun Jiao TERMS AND CONDITIONS 60*c993ae02SXianjun Jiao 61*c993ae02SXianjun Jiao 0. Definitions. 62*c993ae02SXianjun Jiao 63*c993ae02SXianjun Jiao "This License" refers to version 3 of the GNU Affero General Public License. 64*c993ae02SXianjun Jiao 65*c993ae02SXianjun Jiao "Copyright" also means copyright-like laws that apply to other kinds of 66*c993ae02SXianjun Jiaoworks, such as semiconductor masks. 67*c993ae02SXianjun Jiao 68*c993ae02SXianjun Jiao "The Program" refers to any copyrightable work licensed under this 69*c993ae02SXianjun JiaoLicense. Each licensee is addressed as "you". "Licensees" and 70*c993ae02SXianjun Jiao"recipients" may be individuals or organizations. 71*c993ae02SXianjun Jiao 72*c993ae02SXianjun Jiao To "modify" a work means to copy from or adapt all or part of the work 73*c993ae02SXianjun Jiaoin a fashion requiring copyright permission, other than the making of an 74*c993ae02SXianjun Jiaoexact copy. 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But this requirement does not apply 313*c993ae02SXianjun Jiaoif neither you nor any third party retains the ability to install 314*c993ae02SXianjun Jiaomodified object code on the User Product (for example, the work has 315*c993ae02SXianjun Jiaobeen installed in ROM). 316*c993ae02SXianjun Jiao 317*c993ae02SXianjun Jiao The requirement to provide Installation Information does not include a 318*c993ae02SXianjun Jiaorequirement to continue to provide support service, warranty, or updates 319*c993ae02SXianjun Jiaofor a work that has been modified or installed by the recipient, or for 320*c993ae02SXianjun Jiaothe User Product in which it has been modified or installed. Access to a 321*c993ae02SXianjun Jiaonetwork may be denied when the modification itself materially and 322*c993ae02SXianjun Jiaoadversely affects the operation of the network or violates the rules and 323*c993ae02SXianjun Jiaoprotocols for communication across the network. 324*c993ae02SXianjun Jiao 325*c993ae02SXianjun Jiao Corresponding Source conveyed, and Installation Information provided, 326*c993ae02SXianjun Jiaoin accord with this section must be in a format that is publicly 327*c993ae02SXianjun Jiaodocumented (and with an implementation available to the public in 328*c993ae02SXianjun Jiaosource code form), and must require no special password or key for 329*c993ae02SXianjun Jiaounpacking, reading or copying. 330*c993ae02SXianjun Jiao 331*c993ae02SXianjun Jiao 7. 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For 471*c993ae02SXianjun Jiaopurposes of this definition, "control" includes the right to grant 472*c993ae02SXianjun Jiaopatent sublicenses in a manner consistent with the requirements of 473*c993ae02SXianjun Jiaothis License. 474*c993ae02SXianjun Jiao 475*c993ae02SXianjun Jiao Each contributor grants you a non-exclusive, worldwide, royalty-free 476*c993ae02SXianjun Jiaopatent license under the contributor's essential patent claims, to 477*c993ae02SXianjun Jiaomake, use, sell, offer for sale, import and otherwise run, modify and 478*c993ae02SXianjun Jiaopropagate the contents of its contributor version. 479*c993ae02SXianjun Jiao 480*c993ae02SXianjun Jiao In the following three paragraphs, a "patent license" is any express 481*c993ae02SXianjun Jiaoagreement or commitment, however denominated, not to enforce a patent 482*c993ae02SXianjun Jiao(such as an express permission to practice a patent or covenant not to 483*c993ae02SXianjun Jiaosue for patent infringement). To "grant" such a patent license to a 484*c993ae02SXianjun Jiaoparty means to make such an agreement or commitment not to enforce a 485*c993ae02SXianjun Jiaopatent against the party. 486*c993ae02SXianjun Jiao 487*c993ae02SXianjun Jiao If you convey a covered work, knowingly relying on a patent license, 488*c993ae02SXianjun Jiaoand the Corresponding Source of the work is not available for anyone 489*c993ae02SXianjun Jiaoto copy, free of charge and under the terms of this License, through a 490*c993ae02SXianjun Jiaopublicly available network server or other readily accessible means, 491*c993ae02SXianjun Jiaothen you must either (1) cause the Corresponding Source to be so 492*c993ae02SXianjun Jiaoavailable, or (2) arrange to deprive yourself of the benefit of the 493*c993ae02SXianjun Jiaopatent license for this particular work, or (3) arrange, in a manner 494*c993ae02SXianjun Jiaoconsistent with the requirements of this License, to extend the patent 495*c993ae02SXianjun Jiaolicense to downstream recipients. "Knowingly relying" means you have 496*c993ae02SXianjun Jiaoactual knowledge that, but for the patent license, your conveying the 497*c993ae02SXianjun Jiaocovered work in a country, or your recipient's use of the covered work 498*c993ae02SXianjun Jiaoin a country, would infringe one or more identifiable patents in that 499*c993ae02SXianjun Jiaocountry that you have reason to believe are valid. 500*c993ae02SXianjun Jiao 501*c993ae02SXianjun Jiao If, pursuant to or in connection with a single transaction or 502*c993ae02SXianjun Jiaoarrangement, you convey, or propagate by procuring conveyance of, a 503*c993ae02SXianjun Jiaocovered work, and grant a patent license to some of the parties 504*c993ae02SXianjun Jiaoreceiving the covered work authorizing them to use, propagate, modify 505*c993ae02SXianjun Jiaoor convey a specific copy of the covered work, then the patent license 506*c993ae02SXianjun Jiaoyou grant is automatically extended to all recipients of the covered 507*c993ae02SXianjun Jiaowork and works based on it. 508*c993ae02SXianjun Jiao 509*c993ae02SXianjun Jiao A patent license is "discriminatory" if it does not include within 510*c993ae02SXianjun Jiaothe scope of its coverage, prohibits the exercise of, or is 511*c993ae02SXianjun Jiaoconditioned on the non-exercise of one or more of the rights that are 512*c993ae02SXianjun Jiaospecifically granted under this License. You may not convey a covered 513*c993ae02SXianjun Jiaowork if you are a party to an arrangement with a third party that is 514*c993ae02SXianjun Jiaoin the business of distributing software, under which you make payment 515*c993ae02SXianjun Jiaoto the third party based on the extent of your activity of conveying 516*c993ae02SXianjun Jiaothe work, and under which the third party grants, to any of the 517*c993ae02SXianjun Jiaoparties who would receive the covered work from you, a discriminatory 518*c993ae02SXianjun Jiaopatent license (a) in connection with copies of the covered work 519*c993ae02SXianjun Jiaoconveyed by you (or copies made from those copies), or (b) primarily 520*c993ae02SXianjun Jiaofor and in connection with specific products or compilations that 521*c993ae02SXianjun Jiaocontain the covered work, unless you entered into that arrangement, 522*c993ae02SXianjun Jiaoor that patent license was granted, prior to 28 March 2007. 523*c993ae02SXianjun Jiao 524*c993ae02SXianjun Jiao Nothing in this License shall be construed as excluding or limiting 525*c993ae02SXianjun Jiaoany implied license or other defenses to infringement that may 526*c993ae02SXianjun Jiaootherwise be available to you under applicable patent law. 527*c993ae02SXianjun Jiao 528*c993ae02SXianjun Jiao 12. No Surrender of Others' Freedom. 529*c993ae02SXianjun Jiao 530*c993ae02SXianjun Jiao If conditions are imposed on you (whether by court order, agreement or 531*c993ae02SXianjun Jiaootherwise) that contradict the conditions of this License, they do not 532*c993ae02SXianjun Jiaoexcuse you from the conditions of this License. If you cannot convey a 533*c993ae02SXianjun Jiaocovered work so as to satisfy simultaneously your obligations under this 534*c993ae02SXianjun JiaoLicense and any other pertinent obligations, then as a consequence you may 535*c993ae02SXianjun Jiaonot convey it at all. For example, if you agree to terms that obligate you 536*c993ae02SXianjun Jiaoto collect a royalty for further conveying from those to whom you convey 537*c993ae02SXianjun Jiaothe Program, the only way you could satisfy both those terms and this 538*c993ae02SXianjun JiaoLicense would be to refrain entirely from conveying the Program. 539*c993ae02SXianjun Jiao 540*c993ae02SXianjun Jiao 13. Remote Network Interaction; Use with the GNU General Public License. 541*c993ae02SXianjun Jiao 542*c993ae02SXianjun Jiao Notwithstanding any other provision of this License, if you modify the 543*c993ae02SXianjun JiaoProgram, your modified version must prominently offer all users 544*c993ae02SXianjun Jiaointeracting with it remotely through a computer network (if your version 545*c993ae02SXianjun Jiaosupports such interaction) an opportunity to receive the Corresponding 546*c993ae02SXianjun JiaoSource of your version by providing access to the Corresponding Source 547*c993ae02SXianjun Jiaofrom a network server at no charge, through some standard or customary 548*c993ae02SXianjun Jiaomeans of facilitating copying of software. This Corresponding Source 549*c993ae02SXianjun Jiaoshall include the Corresponding Source for any work covered by version 3 550*c993ae02SXianjun Jiaoof the GNU General Public License that is incorporated pursuant to the 551*c993ae02SXianjun Jiaofollowing paragraph. 552*c993ae02SXianjun Jiao 553*c993ae02SXianjun Jiao Notwithstanding any other provision of this License, you have 554*c993ae02SXianjun Jiaopermission to link or combine any covered work with a work licensed 555*c993ae02SXianjun Jiaounder version 3 of the GNU General Public License into a single 556*c993ae02SXianjun Jiaocombined work, and to convey the resulting work. The terms of this 557*c993ae02SXianjun JiaoLicense will continue to apply to the part which is the covered work, 558*c993ae02SXianjun Jiaobut the work with which it is combined will remain governed by version 559*c993ae02SXianjun Jiao3 of the GNU General Public License. 560*c993ae02SXianjun Jiao 561*c993ae02SXianjun Jiao 14. Revised Versions of this License. 562*c993ae02SXianjun Jiao 563*c993ae02SXianjun Jiao The Free Software Foundation may publish revised and/or new versions of 564*c993ae02SXianjun Jiaothe GNU Affero General Public License from time to time. Such new versions 565*c993ae02SXianjun Jiaowill be similar in spirit to the present version, but may differ in detail to 566*c993ae02SXianjun Jiaoaddress new problems or concerns. 567*c993ae02SXianjun Jiao 568*c993ae02SXianjun Jiao Each version is given a distinguishing version number. If the 569*c993ae02SXianjun JiaoProgram specifies that a certain numbered version of the GNU Affero General 570*c993ae02SXianjun JiaoPublic License "or any later version" applies to it, you have the 571*c993ae02SXianjun Jiaooption of following the terms and conditions either of that numbered 572*c993ae02SXianjun Jiaoversion or of any later version published by the Free Software 573*c993ae02SXianjun JiaoFoundation. If the Program does not specify a version number of the 574*c993ae02SXianjun JiaoGNU Affero General Public License, you may choose any version ever published 575*c993ae02SXianjun Jiaoby the Free Software Foundation. 576*c993ae02SXianjun Jiao 577*c993ae02SXianjun Jiao If the Program specifies that a proxy can decide which future 578*c993ae02SXianjun Jiaoversions of the GNU Affero General Public License can be used, that proxy's 579*c993ae02SXianjun Jiaopublic statement of acceptance of a version permanently authorizes you 580*c993ae02SXianjun Jiaoto choose that version for the Program. 581*c993ae02SXianjun Jiao 582*c993ae02SXianjun Jiao Later license versions may give you additional or different 583*c993ae02SXianjun Jiaopermissions. However, no additional obligations are imposed on any 584*c993ae02SXianjun Jiaoauthor or copyright holder as a result of your choosing to follow a 585*c993ae02SXianjun Jiaolater version. 586*c993ae02SXianjun Jiao 587*c993ae02SXianjun Jiao 15. Disclaimer of Warranty. 588*c993ae02SXianjun Jiao 589*c993ae02SXianjun Jiao THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY 590*c993ae02SXianjun JiaoAPPLICABLE LAW. EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT 591*c993ae02SXianjun JiaoHOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY 592*c993ae02SXianjun JiaoOF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, 593*c993ae02SXianjun JiaoTHE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 594*c993ae02SXianjun JiaoPURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM 595*c993ae02SXianjun JiaoIS WITH YOU. SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF 596*c993ae02SXianjun JiaoALL NECESSARY SERVICING, REPAIR OR CORRECTION. 597*c993ae02SXianjun Jiao 598*c993ae02SXianjun Jiao 16. Limitation of Liability. 599*c993ae02SXianjun Jiao 600*c993ae02SXianjun Jiao IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING 601*c993ae02SXianjun JiaoWILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS 602*c993ae02SXianjun JiaoTHE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY 603*c993ae02SXianjun JiaoGENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE 604*c993ae02SXianjun JiaoUSE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF 605*c993ae02SXianjun JiaoDATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD 606*c993ae02SXianjun JiaoPARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS), 607*c993ae02SXianjun JiaoEVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF 608*c993ae02SXianjun JiaoSUCH DAMAGES. 609*c993ae02SXianjun Jiao 610*c993ae02SXianjun Jiao 17. Interpretation of Sections 15 and 16. 611*c993ae02SXianjun Jiao 612*c993ae02SXianjun Jiao If the disclaimer of warranty and limitation of liability provided 613*c993ae02SXianjun Jiaoabove cannot be given local legal effect according to their terms, 614*c993ae02SXianjun Jiaoreviewing courts shall apply local law that most closely approximates 615*c993ae02SXianjun Jiaoan absolute waiver of all civil liability in connection with the 616*c993ae02SXianjun JiaoProgram, unless a warranty or assumption of liability accompanies a 617*c993ae02SXianjun Jiaocopy of the Program in return for a fee. 618*c993ae02SXianjun Jiao 619*c993ae02SXianjun Jiao END OF TERMS AND CONDITIONS 620*c993ae02SXianjun Jiao 621*c993ae02SXianjun Jiao How to Apply These Terms to Your New Programs 622*c993ae02SXianjun Jiao 623*c993ae02SXianjun Jiao If you develop a new program, and you want it to be of the greatest 624*c993ae02SXianjun Jiaopossible use to the public, the best way to achieve this is to make it 625*c993ae02SXianjun Jiaofree software which everyone can redistribute and change under these terms. 626*c993ae02SXianjun Jiao 627*c993ae02SXianjun Jiao To do so, attach the following notices to the program. It is safest 628*c993ae02SXianjun Jiaoto attach them to the start of each source file to most effectively 629*c993ae02SXianjun Jiaostate the exclusion of warranty; and each file should have at least 630*c993ae02SXianjun Jiaothe "copyright" line and a pointer to where the full notice is found. 631*c993ae02SXianjun Jiao 632*c993ae02SXianjun Jiao <one line to give the program's name and a brief idea of what it does.> 633*c993ae02SXianjun Jiao Copyright (C) <year> <name of author> 634*c993ae02SXianjun Jiao 635*c993ae02SXianjun Jiao This program is free software: you can redistribute it and/or modify 636*c993ae02SXianjun Jiao it under the terms of the GNU Affero General Public License as published by 637*c993ae02SXianjun Jiao the Free Software Foundation, either version 3 of the License, or 638*c993ae02SXianjun Jiao (at your option) any later version. 639*c993ae02SXianjun Jiao 640*c993ae02SXianjun Jiao This program is distributed in the hope that it will be useful, 641*c993ae02SXianjun Jiao but WITHOUT ANY WARRANTY; without even the implied warranty of 642*c993ae02SXianjun Jiao MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 643*c993ae02SXianjun Jiao GNU Affero General Public License for more details. 644*c993ae02SXianjun Jiao 645*c993ae02SXianjun Jiao You should have received a copy of the GNU Affero General Public License 646*c993ae02SXianjun Jiao along with this program. If not, see <http://www.gnu.org/licenses/>. 647*c993ae02SXianjun Jiao 648*c993ae02SXianjun JiaoAlso add information on how to contact you by electronic and paper mail. 649*c993ae02SXianjun Jiao 650*c993ae02SXianjun Jiao If your software can interact with users remotely through a computer 651*c993ae02SXianjun Jiaonetwork, you should also make sure that it provides a way for users to 652*c993ae02SXianjun Jiaoget its source. For example, if your program is a web application, its 653*c993ae02SXianjun Jiaointerface could display a "Source" link that leads users to an archive 654*c993ae02SXianjun Jiaoof the code. There are many ways you could offer source, and different 655*c993ae02SXianjun Jiaosolutions will be better for different programs; see section 13 for the 656*c993ae02SXianjun Jiaospecific requirements. 657*c993ae02SXianjun Jiao 658*c993ae02SXianjun Jiao You should also get your employer (if you work as a programmer) or school, 659*c993ae02SXianjun Jiaoif any, to sign a "copyright disclaimer" for the program, if necessary. 660*c993ae02SXianjun JiaoFor more information on this, and how to apply and follow the GNU AGPL, see 661*c993ae02SXianjun Jiao<http://www.gnu.org/licenses/>. 662