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{"name":"Libhttpserver","tagline":"C++ library for creating an embedded Rest HTTP server (and more)","body":"<!---\r\nCopyright (C) 2014 Sebastiano Merlino.\r\n Permission is granted to copy, distribute and/or modify this document\r\n under the terms of the GNU Free Documentation License, Version 1.3\r\n or any later version published by the Free Software Foundation;\r\n with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts.\r\n A copy of the license is included in the section entitled \"GNU\r\n Free Documentation License\".\r\n-->\r\n\r\nThe libhttpserver (0.7.2) reference manual\r\n==========================================\r\n\r\n[](https://travis-ci.org/etr/libhttpserver)\r\n\r\nThis library has been originally developed under the zencoders flags and this community has always supported me all along this work so I am happy to put the logo on this readme.\r\n\r\n When you see this tree, know that you've came across ZenCoders.org\r\n \r\n with open('ZenCoders. \r\n `num` in numbers synchronized \r\n datetime d glob. sys.argv[2] . \r\n def myclass `..` @@oscla org. . class { \r\n displ hooks( public static void ma functor: \r\n $myclass->method( impport sys, os.pipe ` @param name` \r\n fcl if(system(cmd) myc. /de ` $card( array(\"a\" srand \r\n format lists: ++: conc ++ \"my an WHERE for( == myi \r\n `sys: myvalue(myvalue) sys.t Console.W try{ rais using \r\n connec SELECT * FROM table mycnf acco desc and or selector::clas at \r\n openldap string sys. print \"zenc der \" { 'a': `ls -l` > appe &firs \r\n import Tkinter paste( $obh &a or it myval bro roll: :: [] require a \r\n case `` super. +y <svg x=\"100\"> expr say \" %rooms 1 --account fb- yy \r\n proc meth Animate => send(D, open) putd EndIf 10 whi myc` cont \r\n and main (--) import loop $$ or end onload UNION WITH tab timer 150 *2 \r\n end. begin True GtkLabel *label doto partition te let auto i<- (i + d ); \r\n .mushup ``/. ^/zenc/ myclass->her flv op <> element >> 71 or \r\n QFileDi : and .. with myc toA channel::bo myc isEmpty a not bodt;\r\n class T public pol str mycalc d pt &&a *i fc add ^ac\r\n ::ZenCoders::core::namespac boost::function st f = std: ;; int assert\r\n cout << endl public genera #include \"b ost ::ac myna const cast<char*> mys\r\n ac size_t return ran int (*getNextValue)(void) ff double sa_family_t famil\r\n pu a do puts(\" ac int main(int argc, char* \"%5d struct nam\r\n cs float for typedef enum puts getchar() \r\n if( else #define fp FILE* f char* s \r\n i++ strcat( %s int \r\n 31] total+= do \r\n }do while(1) sle \r\n getc strcpy( a for \r\n prin scanf(%d, & get \r\n int void myfunc(int pa retu \r\n BEQ BNEQZ R1 10 ANDI R1 R2 SYS \r\n XOR SYSCALL 5 SLTIU MFLO 15 SW JAL \r\n BNE BLTZAL R1 1 LUI 001 NOOP MULTU SLLV \r\n MOV R1 ADD R1 R2 JUMP 10 1001 BEQ R1 R2 1 ANDI \r\n 1101 1010001100 111 001 01 1010 101100 1001 100 \r\n 110110 100 0 01 101 01100 100 100 1000100011 \r\n 11101001001 00 11 100 11 10100010 \r\n 000101001001 10 1001 101000101 \r\n 010010010010110101001010\r\n\r\nFor further information:\r\nvisit our website www.zencoders.org\r\n\r\nAuthor: Sebastiano Merlino\r\n\r\nCopying\r\n=======\r\nThis manual is for libhttpserver, C++ library for creating an\r\nembedded Rest HTTP server (and more).\r\n\r\n> Permission is granted to copy, distribute and/or modify this document\r\n> under the terms of the GNU Free Documentation License, Version 1.3\r\n> or any later version published by the Free Software Foundation;\r\n> with no Invariant Sections, no Front-Cover Texts, and no Back-Cover\r\n> Texts. A copy of the license is included in the section entitled GNU\r\n> Free Documentation License.\r\n\r\nContents\r\n========\r\n* Introduction.\r\n* Requirements.\r\n* Compilation.\r\n* Constants.\r\n* Structures and classes type definition.\r\n* Callback functions definition.\r\n* Create and work with server.\r\n* Registering resources.\r\n* Building responses to requests.\r\n* Whitelists and Blacklists.\r\n* Simple comet semantics.\r\n* Utilizing Authentication.\r\n* Obtaining and modifying status information.\r\n\r\nAppendices\r\n----------\r\n* GNU-LGPL: The GNU Lesser General Public License says how you can copy and share almost all of libhttpserver.\r\n* GNU-FDL: The GNU Free Documentation License says how you can copy and share the documentation of libhttpserver.\r\n\r\nIntroduction\r\n============\r\nlibhttpserver is meant to constitute an easy system to build HTTP\r\nservers with REST fashion.\r\nlibhttpserver is based on libmicrohttpd and, like this, it is a\r\ndaemon library.\r\nThe mission of this library is to support all possible HTTP features\r\ndirectly and with a simple semantic allowing then the user to concentrate\r\nonly on his application and not on HTTP request handling details.\r\n\r\nThe library is supposed to work transparently for the client Implementing\r\nthe business logic and using the library itself to realize an interface.\r\nIf the user wants it must be able to change every behavior of the library\r\nitself through the registration of callbacks.\r\n\r\nLike the api is based on (libmicrohttpd), libhttpserver is able to decode\r\ncertain body format a and automatically format them in object oriented\r\nfashion. This is true for query arguments and for *POST* and *PUT*\r\nrequests bodies if *application/x-www-form-urlencoded* or\r\n*multipart/form-data* header are passed.\r\n\r\nThe header reproduce all the constants defined by libhttpserver.\r\nThese maps various constant used by the HTTP protocol that are exported\r\nas a convenience for users of the library. Is is possible for the user\r\nto define their own extensions of the HTTP standard and use those with\r\nlibhttpserver.\r\n\r\nAll functions are guaranteed to be completely reentrant and\r\nthread-safe (unless differently specified).\r\nAdditionally, clients can specify resource limits on the overall\r\nnumber of connections, number of connections per IP address and memory\r\nused per connection to avoid resource exhaustion.\r\n\r\nRequirements\r\n============\r\n* g++ >= 4.1.2\r\n* libmicrohttpd >= 0.9.7\r\n* doxygen (if you want to build code reference)\r\n\r\nCompilation\r\n===========\r\nlibhttpserver uses the standard system where the usual build process\r\ninvolves running\r\n> ./bootstrap \r\n> mkdir build \r\n> cd build \r\n> ../configure \r\n> make \r\n> make install \r\n\r\nOptional parameters to configure script\r\n---------------------------------------\r\nA complete list of parameters can be obtained running 'configure --help'.\r\nHere are listed the libhttpserver specific options (the canonical configure options are also supported).\r\n\r\n* --enable-same-directory-build: enable to compile in the same directory. This is heavily discouraged. (def=no)\r\n* --enable-debug: enable debug data generation (def=no)\r\n* --enable-cpp11: enable c++11 std classes (def=no)\r\n* --disable-doxygen-doc: don't generate any doxygen documentation\r\n* --disable-doxygen-dot: don't generate graphics for doxygen documentation\r\n* --disable-doxygen-man: don't generate doxygen manual pages\r\n* --enable-doxygen-rtf: generate doxygen RTF documentation\r\n* --enable-doxygen-xml: generate doxygen XML documentation\r\n* --enable-doxygen-chm: generate doxygen compressed HTML help documentation\r\n* --enable-doxygen-chi: generate doxygen seperate compressed HTML help index file\r\n* --disable-doxygen-html: don't generate doxygen plain HTML documentation\r\n* --enable-doxygen-ps: generate doxygen PostScript documentation\r\n* --enable-doxygen-pdf: generate doxygen PDF documentation\r\n\r\nConstants\r\n=========\r\nW.I.P.\r\n\r\nStructures and classes type definition\r\n======================================\r\n* http_resource (CPP class): Represents the resource associated with a specific http endpoint.\r\n* http_request (CPP class): Represents the request received by the resource that process it.\r\n* http_response (CPP class): Represents the response sent by the server once the resource finished its work.\r\n* event_supplier (CPP class): Represents a class that supplies events to the webserver. It can be used to trigger the internal select of it.\r\n* webserver (CPP class): Represents the daemon listening on a socket for HTTP traffic.\r\n\r\nGNU Lesser General Public License\r\n=================================\r\n\r\nVersion 2.1, February 1999\r\n\r\nCopyright © 1991, 1999 Free Software Foundation, Inc.\r\n51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA\r\nEveryone is permitted to copy and distribute verbatim copies\r\nof this license document, but changing it is not allowed.\r\n\r\n_This is the first released version of the Lesser GPL. It also counts\r\nas the successor of the GNU Library Public License, version 2, hence\r\nthe version number 2.1._\r\n\r\n### Preamble\r\n\r\nThe licenses for most software are designed to take away your\r\nfreedom to share and change it. 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For example, if a patent\r\nlicense would not permit royalty-free redistribution of the Library by\r\nall those who receive copies directly or indirectly through you, then\r\nthe only way you could satisfy both it and this License would be to\r\nrefrain entirely from distribution of the Library.\r\n\r\nIf any portion of this section is held invalid or unenforceable under any\r\nparticular circumstance, the balance of the section is intended to apply,\r\nand the section as a whole is intended to apply in other circumstances.\r\n\r\nIt is not the purpose of this section to induce you to infringe any\r\npatents or other property right claims or to contest validity of any\r\nsuch claims; this section has the sole purpose of protecting the\r\nintegrity of the free software distribution system which is\r\nimplemented by public license practices. Many people have made\r\ngenerous contributions to the wide range of software distributed\r\nthrough that system in reliance on consistent application of that\r\nsystem; it is up to the author/donor to decide if he or she is willing\r\nto distribute software through any other system and a licensee cannot\r\nimpose that choice.\r\n\r\nThis section is intended to make thoroughly clear what is believed to\r\nbe a consequence of the rest of this License.\r\n\r\n**12.** If the distribution and/or use of the Library is restricted in\r\ncertain countries either by patents or by copyrighted interfaces, the\r\noriginal copyright holder who places the Library under this License may add\r\nan explicit geographical distribution limitation excluding those countries,\r\nso that distribution is permitted only in or among countries not thus\r\nexcluded. In such case, this License incorporates the limitation as if\r\nwritten in the body of this License.\r\n\r\n**13.** The Free Software Foundation may publish revised and/or new\r\nversions of the Lesser General Public License from time to time.\r\nSuch new versions will be similar in spirit to the present version,\r\nbut may differ in detail to address new problems or concerns.\r\n\r\nEach version is given a distinguishing version number. If the Library\r\nspecifies a version number of this License which applies to it and\r\n“any later version”, you have the option of following the terms and\r\nconditions either of that version or of any later version published by\r\nthe Free Software Foundation. If the Library does not specify a\r\nlicense version number, you may choose any version ever published by\r\nthe Free Software Foundation.\r\n\r\n**14.** If you wish to incorporate parts of the Library into other free\r\nprograms whose distribution conditions are incompatible with these,\r\nwrite to the author to ask for permission. For software which is\r\ncopyrighted by the Free Software Foundation, write to the Free\r\nSoftware Foundation; we sometimes make exceptions for this. Our\r\ndecision will be guided by the two goals of preserving the free status\r\nof all derivatives of our free software and of promoting the sharing\r\nand reuse of software generally.\r\n\r\n### NO WARRANTY\r\n\r\n**15.** BECAUSE THE LIBRARY IS LICENSED FREE OF CHARGE, THERE IS NO\r\nWARRANTY FOR THE LIBRARY, TO THE EXTENT PERMITTED BY APPLICABLE LAW.\r\nEXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR\r\nOTHER PARTIES PROVIDE THE LIBRARY “AS IS” WITHOUT WARRANTY OF ANY\r\nKIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE\r\nIMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR\r\nPURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE\r\nLIBRARY IS WITH YOU. SHOULD THE LIBRARY PROVE DEFECTIVE, YOU ASSUME\r\nTHE COST OF ALL NECESSARY SERVICING, REPAIR OR CORRECTION.\r\n\r\n**16.** IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN\r\nWRITING WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY\r\nAND/OR REDISTRIBUTE THE LIBRARY AS PERMITTED ABOVE, BE LIABLE TO YOU\r\nFOR DAMAGES, INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR\r\nCONSEQUENTIAL DAMAGES ARISING OUT OF THE USE OR INABILITY TO USE THE\r\nLIBRARY (INCLUDING BUT NOT LIMITED TO LOSS OF DATA OR DATA BEING\r\nRENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD PARTIES OR A\r\nFAILURE OF THE LIBRARY TO OPERATE WITH ANY OTHER SOFTWARE), EVEN IF\r\nSUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH\r\nDAMAGES.\r\n\r\nEND OF TERMS AND CONDITIONS\r\n\r\n### How to Apply These Terms to Your New Libraries\r\n\r\nIf you develop a new library, and you want it to be of the greatest\r\npossible use to the public, we recommend making it free software that\r\neveryone can redistribute and change. You can do so by permitting\r\nredistribution under these terms (or, alternatively, under the terms of the\r\nordinary General Public License).\r\n\r\nTo apply these terms, attach the following notices to the library. It is\r\nsafest to attach them to the start of each source file to most effectively\r\nconvey the exclusion of warranty; and each file should have at least the\r\n“copyright” line and a pointer to where the full notice is found.\r\n\r\n <one line to give the library's name and a brief idea of what it does.>\r\n Copyright (C) <year> <name of author>\r\n\r\n This library is free software; you can redistribute it and/or\r\n modify it under the terms of the GNU Lesser General Public\r\n License as published by the Free Software Foundation; either\r\n version 2.1 of the License, or (at your option) any later version.\r\n\r\n This library is distributed in the hope that it will be useful,\r\n but WITHOUT ANY WARRANTY; without even the implied warranty of\r\n MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU\r\n Lesser General Public License for more details.\r\n\r\n You should have received a copy of the GNU Lesser General Public\r\n License along with this library; if not, write to the Free Software\r\n Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA\r\n\r\nAlso add information on how to contact you by electronic and paper mail.\r\n\r\nYou should also get your employer (if you work as a programmer) or your\r\nschool, if any, to sign a “copyright disclaimer” for the library, if\r\nnecessary. Here is a sample; alter the names:\r\n\r\n Yoyodyne, Inc., hereby disclaims all copyright interest in the\r\n library `Frob' (a library for tweaking knobs) written by James Random Hacker.\r\n\r\n <signature of Ty Coon>, 1 April 1990\r\n Ty Coon, President of Vice\r\n\r\nThat's all there is to it!\r\n\r\nGNU Free Documentation License\r\n==============================\r\n\r\nVersion 1.3, 3 November 2008\r\n\r\nCopyright © 2000, 2001, 2002, 2007, 2008 Free Software Foundation, Inc. <<http://fsf.org/>>\r\n\r\nEveryone is permitted to copy and distribute verbatim copies\r\nof this license document, but changing it is not allowed.\r\n\r\n### 0. PREAMBLE\r\n\r\nThe purpose of this License is to make a manual, textbook, or other\r\nfunctional and useful document “free” in the sense of freedom: to\r\nassure everyone the effective freedom to copy and redistribute it,\r\nwith or without modifying it, either commercially or noncommercially.\r\nSecondarily, this License preserves for the author and publisher a way\r\nto get credit for their work, while not being considered responsible\r\nfor modifications made by others.\r\n\r\nThis License is a kind of “copyleft”, which means that derivative\r\nworks of the document must themselves be free in the same sense. It\r\ncomplements the GNU General Public License, which is a copyleft\r\nlicense designed for free software.\r\n\r\nWe have designed this License in order to use it for manuals for free\r\nsoftware, because free software needs free documentation: a free\r\nprogram should come with manuals providing the same freedoms that the\r\nsoftware does. But this License is not limited to software manuals;\r\nit can be used for any textual work, regardless of subject matter or\r\nwhether it is published as a printed book. We recommend this License\r\nprincipally for works whose purpose is instruction or reference.\r\n\r\n\r\n### 1. APPLICABILITY AND DEFINITIONS\r\n\r\nThis License applies to any manual or other work, in any medium, that\r\ncontains a notice placed by the copyright holder saying it can be\r\ndistributed under the terms of this License. Such a notice grants a\r\nworld-wide, royalty-free license, unlimited in duration, to use that\r\nwork under the conditions stated herein. The “Document”, below,\r\nrefers to any such manual or work. Any member of the public is a\r\nlicensee, and is addressed as “you”. You accept the license if you\r\ncopy, modify or distribute the work in a way requiring permission\r\nunder copyright law.\r\n\r\nA “Modified Version” of the Document means any work containing the\r\nDocument or a portion of it, either copied verbatim, or with\r\nmodifications and/or translated into another language.\r\n\r\nA “Secondary Section” is a named appendix or a front-matter section of\r\nthe Document that deals exclusively with the relationship of the\r\npublishers or authors of the Document to the Document's overall\r\nsubject (or to related matters) and contains nothing that could fall\r\ndirectly within that overall subject. (Thus, if the Document is in\r\npart a textbook of mathematics, a Secondary Section may not explain\r\nany mathematics.) The relationship could be a matter of historical\r\nconnection with the subject or with related matters, or of legal,\r\ncommercial, philosophical, ethical or political position regarding\r\nthem.\r\n\r\nThe “Invariant Sections” are certain Secondary Sections whose titles\r\nare designated, as being those of Invariant Sections, in the notice\r\nthat says that the Document is released under this License. If a\r\nsection does not fit the above definition of Secondary then it is not\r\nallowed to be designated as Invariant. The Document may contain zero\r\nInvariant Sections. If the Document does not identify any Invariant\r\nSections then there are none.\r\n\r\nThe “Cover Texts” are certain short passages of text that are listed,\r\nas Front-Cover Texts or Back-Cover Texts, in the notice that says that\r\nthe Document is released under this License. A Front-Cover Text may\r\nbe at most 5 words, and a Back-Cover Text may be at most 25 words.\r\n\r\nA “Transparent” copy of the Document means a machine-readable copy,\r\nrepresented in a format whose specification is available to the\r\ngeneral public, that is suitable for revising the document\r\nstraightforwardly with generic text editors or (for images composed of\r\npixels) generic paint programs or (for drawings) some widely available\r\ndrawing editor, and that is suitable for input to text formatters or\r\nfor automatic translation to a variety of formats suitable for input\r\nto text formatters. A copy made in an otherwise Transparent file\r\nformat whose markup, or absence of markup, has been arranged to thwart\r\nor discourage subsequent modification by readers is not Transparent.\r\nAn image format is not Transparent if used for any substantial amount\r\nof text. A copy that is not “Transparent” is called “Opaque”.\r\n\r\nExamples of suitable formats for Transparent copies include plain\r\nASCII without markup, Texinfo input format, LaTeX input format, SGML\r\nor XML using a publicly available DTD, and standard-conforming simple\r\nHTML, PostScript or PDF designed for human modification. Examples of\r\ntransparent image formats include PNG, XCF and JPG. Opaque formats\r\ninclude proprietary formats that can be read and edited only by\r\nproprietary word processors, SGML or XML for which the DTD and/or\r\nprocessing tools are not generally available, and the\r\nmachine-generated HTML, PostScript or PDF produced by some word\r\nprocessors for output purposes only.\r\n\r\nThe “Title Page” means, for a printed book, the title page itself,\r\nplus such following pages as are needed to hold, legibly, the material\r\nthis License requires to appear in the title page. For works in\r\nformats which do not have any title page as such, “Title Page” means\r\nthe text near the most prominent appearance of the work's title,\r\npreceding the beginning of the body of the text.\r\n\r\nThe “publisher” means any person or entity that distributes copies of\r\nthe Document to the public.\r\n\r\nA section “Entitled XYZ” means a named subunit of the Document whose\r\ntitle either is precisely XYZ or contains XYZ in parentheses following\r\ntext that translates XYZ in another language. (Here XYZ stands for a\r\nspecific section name mentioned below, such as “Acknowledgements”,\r\n“Dedications”, “Endorsements”, or “History”.) To “Preserve the Title”\r\nof such a section when you modify the Document means that it remains a\r\nsection “Entitled XYZ” according to this definition.\r\n\r\nThe Document may include Warranty Disclaimers next to the notice which\r\nstates that this License applies to the Document. These Warranty\r\nDisclaimers are considered to be included by reference in this\r\nLicense, but only as regards disclaiming warranties: any other\r\nimplication that these Warranty Disclaimers may have is void and has\r\nno effect on the meaning of this License.\r\n\r\n### 2. VERBATIM COPYING\r\n\r\nYou may copy and distribute the Document in any medium, either\r\ncommercially or noncommercially, provided that this License, the\r\ncopyright notices, and the license notice saying this License applies\r\nto the Document are reproduced in all copies, and that you add no\r\nother conditions whatsoever to those of this License. You may not use\r\ntechnical measures to obstruct or control the reading or further\r\ncopying of the copies you make or distribute. However, you may accept\r\ncompensation in exchange for copies. If you distribute a large enough\r\nnumber of copies you must also follow the conditions in section 3.\r\n\r\nYou may also lend copies, under the same conditions stated above, and\r\nyou may publicly display copies.\r\n\r\n\r\n### 3. COPYING IN QUANTITY\r\n\r\nIf you publish printed copies (or copies in media that commonly have\r\nprinted covers) of the Document, numbering more than 100, and the\r\nDocument's license notice requires Cover Texts, you must enclose the\r\ncopies in covers that carry, clearly and legibly, all these Cover\r\nTexts: Front-Cover Texts on the front cover, and Back-Cover Texts on\r\nthe back cover. Both covers must also clearly and legibly identify\r\nyou as the publisher of these copies. The front cover must present\r\nthe full title with all words of the title equally prominent and\r\nvisible. You may add other material on the covers in addition.\r\nCopying with changes limited to the covers, as long as they preserve\r\nthe title of the Document and satisfy these conditions, can be treated\r\nas verbatim copying in other respects.\r\n\r\nIf the required texts for either cover are too voluminous to fit\r\nlegibly, you should put the first ones listed (as many as fit\r\nreasonably) on the actual cover, and continue the rest onto adjacent\r\npages.\r\n\r\nIf you publish or distribute Opaque copies of the Document numbering\r\nmore than 100, you must either include a machine-readable Transparent\r\ncopy along with each Opaque copy, or state in or with each Opaque copy\r\na computer-network location from which the general network-using\r\npublic has access to download using public-standard network protocols\r\na complete Transparent copy of the Document, free of added material.\r\nIf you use the latter option, you must take reasonably prudent steps,\r\nwhen you begin distribution of Opaque copies in quantity, to ensure\r\nthat this Transparent copy will remain thus accessible at the stated\r\nlocation until at least one year after the last time you distribute an\r\nOpaque copy (directly or through your agents or retailers) of that\r\nedition to the public.\r\n\r\nIt is requested, but not required, that you contact the authors of the\r\nDocument well before redistributing any large number of copies, to\r\ngive them a chance to provide you with an updated version of the\r\nDocument.\r\n\r\n\r\n### 4. MODIFICATIONS\r\n\r\nYou may copy and distribute a Modified Version of the Document under\r\nthe conditions of sections 2 and 3 above, provided that you release\r\nthe Modified Version under precisely this License, with the Modified\r\nVersion filling the role of the Document, thus licensing distribution\r\nand modification of the Modified Version to whoever possesses a copy\r\nof it. In addition, you must do these things in the Modified Version:\r\n\r\n* **A.** Use in the Title Page (and on the covers, if any) a title distinct\r\nfrom that of the Document, and from those of previous versions\r\n(which should, if there were any, be listed in the History section\r\nof the Document). You may use the same title as a previous version\r\nif the original publisher of that version gives permission.\r\n* **B.** List on the Title Page, as authors, one or more persons or entities\r\nresponsible for authorship of the modifications in the Modified\r\nVersion, together with at least five of the principal authors of the\r\nDocument (all of its principal authors, if it has fewer than five),\r\nunless they release you from this requirement.\r\n* **C.** State on the Title page the name of the publisher of the\r\nModified Version, as the publisher.\r\n* **D.** Preserve all the copyright notices of the Document.\r\n* **E.** Add an appropriate copyright notice for your modifications\r\nadjacent to the other copyright notices.\r\n* **F.** Include, immediately after the copyright notices, a license notice\r\ngiving the public permission to use the Modified Version under the\r\nterms of this License, in the form shown in the Addendum below.\r\n* **G.** Preserve in that license notice the full lists of Invariant Sections\r\nand required Cover Texts given in the Document's license notice.\r\n* **H.** Include an unaltered copy of this License.\r\n* **I.** Preserve the section Entitled “History”, Preserve its Title, and add\r\nto it an item stating at least the title, year, new authors, and\r\npublisher of the Modified Version as given on the Title Page. If\r\nthere is no section Entitled “History” in the Document, create one\r\nstating the title, year, authors, and publisher of the Document as\r\ngiven on its Title Page, then add an item describing the Modified\r\nVersion as stated in the previous sentence.\r\n* **J.** Preserve the network location, if any, given in the Document for\r\npublic access to a Transparent copy of the Document, and likewise\r\nthe network locations given in the Document for previous versions\r\nit was based on. These may be placed in the “History” section.\r\nYou may omit a network location for a work that was published at\r\nleast four years before the Document itself, or if the original\r\npublisher of the version it refers to gives permission.\r\n* **K.** For any section Entitled “Acknowledgements” or “Dedications”,\r\nPreserve the Title of the section, and preserve in the section all\r\nthe substance and tone of each of the contributor acknowledgements\r\nand/or dedications given therein.\r\n* **L.** Preserve all the Invariant Sections of the Document,\r\nunaltered in their text and in their titles. Section numbers\r\nor the equivalent are not considered part of the section titles.\r\n* **M.** Delete any section Entitled “Endorsements”. Such a section\r\nmay not be included in the Modified Version.\r\n* **N.** Do not retitle any existing section to be Entitled “Endorsements”\r\nor to conflict in title with any Invariant Section.\r\n* **O.** Preserve any Warranty Disclaimers.\r\n\r\nIf the Modified Version includes new front-matter sections or\r\nappendices that qualify as Secondary Sections and contain no material\r\ncopied from the Document, you may at your option designate some or all\r\nof these sections as invariant. To do this, add their titles to the\r\nlist of Invariant Sections in the Modified Version's license notice.\r\nThese titles must be distinct from any other section titles.\r\n\r\nYou may add a section Entitled “Endorsements”, provided it contains\r\nnothing but endorsements of your Modified Version by various\r\nparties--for example, statements of peer review or that the text has\r\nbeen approved by an organization as the authoritative definition of a\r\nstandard.\r\n\r\nYou may add a passage of up to five words as a Front-Cover Text, and a\r\npassage of up to 25 words as a Back-Cover Text, to the end of the list\r\nof Cover Texts in the Modified Version. Only one passage of\r\nFront-Cover Text and one of Back-Cover Text may be added by (or\r\nthrough arrangements made by) any one entity. If the Document already\r\nincludes a cover text for the same cover, previously added by you or\r\nby arrangement made by the same entity you are acting on behalf of,\r\nyou may not add another; but you may replace the old one, on explicit\r\npermission from the previous publisher that added the old one.\r\n\r\nThe author(s) and publisher(s) of the Document do not by this License\r\ngive permission to use their names for publicity for or to assert or\r\nimply endorsement of any Modified Version.\r\n\r\n\r\n### 5. COMBINING DOCUMENTS\r\n\r\nYou may combine the Document with other documents released under this\r\nLicense, under the terms defined in section 4 above for modified\r\nversions, provided that you include in the combination all of the\r\nInvariant Sections of all of the original documents, unmodified, and\r\nlist them all as Invariant Sections of your combined work in its\r\nlicense notice, and that you preserve all their Warranty Disclaimers.\r\n\r\nThe combined work need only contain one copy of this License, and\r\nmultiple identical Invariant Sections may be replaced with a single\r\ncopy. If there are multiple Invariant Sections with the same name but\r\ndifferent contents, make the title of each such section unique by\r\nadding at the end of it, in parentheses, the name of the original\r\nauthor or publisher of that section if known, or else a unique number.\r\nMake the same adjustment to the section titles in the list of\r\nInvariant Sections in the license notice of the combined work.\r\n\r\nIn the combination, you must combine any sections Entitled “History”\r\nin the various original documents, forming one section Entitled\r\n“History”; likewise combine any sections Entitled “Acknowledgements”,\r\nand any sections Entitled “Dedications”. You must delete all sections\r\nEntitled “Endorsements”.\r\n\r\n\r\n### 6. COLLECTIONS OF DOCUMENTS\r\n\r\nYou may make a collection consisting of the Document and other\r\ndocuments released under this License, and replace the individual\r\ncopies of this License in the various documents with a single copy\r\nthat is included in the collection, provided that you follow the rules\r\nof this License for verbatim copying of each of the documents in all\r\nother respects.\r\n\r\nYou may extract a single document from such a collection, and\r\ndistribute it individually under this License, provided you insert a\r\ncopy of this License into the extracted document, and follow this\r\nLicense in all other respects regarding verbatim copying of that\r\ndocument.\r\n\r\n\r\n### 7. AGGREGATION WITH INDEPENDENT WORKS\r\n\r\nA compilation of the Document or its derivatives with other separate\r\nand independent documents or works, in or on a volume of a storage or\r\ndistribution medium, is called an “aggregate” if the copyright\r\nresulting from the compilation is not used to limit the legal rights\r\nof the compilation's users beyond what the individual works permit.\r\nWhen the Document is included in an aggregate, this License does not\r\napply to the other works in the aggregate which are not themselves\r\nderivative works of the Document.\r\n\r\nIf the Cover Text requirement of section 3 is applicable to these\r\ncopies of the Document, then if the Document is less than one half of\r\nthe entire aggregate, the Document's Cover Texts may be placed on\r\ncovers that bracket the Document within the aggregate, or the\r\nelectronic equivalent of covers if the Document is in electronic form.\r\nOtherwise they must appear on printed covers that bracket the whole\r\naggregate.\r\n\r\n\r\n### 8. TRANSLATION\r\n\r\nTranslation is considered a kind of modification, so you may\r\ndistribute translations of the Document under the terms of section 4.\r\nReplacing Invariant Sections with translations requires special\r\npermission from their copyright holders, but you may include\r\ntranslations of some or all Invariant Sections in addition to the\r\noriginal versions of these Invariant Sections. You may include a\r\ntranslation of this License, and all the license notices in the\r\nDocument, and any Warranty Disclaimers, provided that you also include\r\nthe original English version of this License and the original versions\r\nof those notices and disclaimers. In case of a disagreement between\r\nthe translation and the original version of this License or a notice\r\nor disclaimer, the original version will prevail.\r\n\r\nIf a section in the Document is Entitled “Acknowledgements”,\r\n“Dedications”, or “History”, the requirement (section 4) to Preserve\r\nits Title (section 1) will typically require changing the actual\r\ntitle.\r\n\r\n\r\n### 9. TERMINATION\r\n\r\nYou may not copy, modify, sublicense, or distribute the Document\r\nexcept as expressly provided under this License. Any attempt\r\notherwise to copy, modify, sublicense, or distribute it is void, and\r\nwill automatically terminate your rights under this License.\r\n\r\nHowever, if you cease all violation of this License, then your license\r\nfrom a particular copyright holder is reinstated (a) provisionally,\r\nunless and until the copyright holder explicitly and finally\r\nterminates your license, and (b) permanently, if the copyright holder\r\nfails to notify you of the violation by some reasonable means prior to\r\n60 days after the cessation.\r\n\r\nMoreover, your license from a particular copyright holder is\r\nreinstated permanently if the copyright holder notifies you of the\r\nviolation by some reasonable means, this is the first time you have\r\nreceived notice of violation of this License (for any work) from that\r\ncopyright holder, and you cure the violation prior to 30 days after\r\nyour receipt of the notice.\r\n\r\nTermination of your rights under this section does not terminate the\r\nlicenses of parties who have received copies or rights from you under\r\nthis License. If your rights have been terminated and not permanently\r\nreinstated, receipt of a copy of some or all of the same material does\r\nnot give you any rights to use it.\r\n\r\n\r\n### 10. FUTURE REVISIONS OF THIS LICENSE\r\n\r\nThe Free Software Foundation may publish new, revised versions of the\r\nGNU Free Documentation License from time to time. Such new versions\r\nwill be similar in spirit to the present version, but may differ in\r\ndetail to address new problems or concerns. See\r\n<<http://www.gnu.org/copyleft/>>.\r\n\r\nEach version of the License is given a distinguishing version number.\r\nIf the Document specifies that a particular numbered version of this\r\nLicense “or any later version” applies to it, you have the option of\r\nfollowing the terms and conditions either of that specified version or\r\nof any later version that has been published (not as a draft) by the\r\nFree Software Foundation. If the Document does not specify a version\r\nnumber of this License, you may choose any version ever published (not\r\nas a draft) by the Free Software Foundation. If the Document\r\nspecifies that a proxy can decide which future versions of this\r\nLicense can be used, that proxy's public statement of acceptance of a\r\nversion permanently authorizes you to choose that version for the\r\nDocument.\r\n\r\n### 11. RELICENSING\r\n\r\n“Massive Multiauthor Collaboration Site” (or “MMC Site”) means any\r\nWorld Wide Web server that publishes copyrightable works and also\r\nprovides prominent facilities for anybody to edit those works. A\r\npublic wiki that anybody can edit is an example of such a server. A\r\n“Massive Multiauthor Collaboration” (or “MMC”) contained in the site\r\nmeans any set of copyrightable works thus published on the MMC site.\r\n\r\n“CC-BY-SA” means the Creative Commons Attribution-Share Alike 3.0 \r\nlicense published by Creative Commons Corporation, a not-for-profit \r\ncorporation with a principal place of business in San Francisco, \r\nCalifornia, as well as future copyleft versions of that license \r\npublished by that same organization.\r\n\r\n“Incorporate” means to publish or republish a Document, in whole or in \r\npart, as part of another Document.\r\n\r\nAn MMC is “eligible for relicensing” if it is licensed under this \r\nLicense, and if all works that were first published under this License \r\nsomewhere other than this MMC, and subsequently incorporated in whole or \r\nin part into the MMC, (1) had no cover texts or invariant sections, and \r\n(2) were thus incorporated prior to November 1, 2008.\r\n\r\nThe operator of an MMC Site may republish an MMC contained in the site\r\nunder CC-BY-SA on the same site at any time before August 1, 2009,\r\nprovided the MMC is eligible for relicensing.\r\n\r\n\r\n## ADDENDUM: How to use this License for your documents\r\n\r\nTo use this License in a document you have written, include a copy of\r\nthe License in the document and put the following copyright and\r\nlicense notices just after the title page:\r\n\r\n Copyright (c) YEAR YOUR NAME.\r\n Permission is granted to copy, distribute and/or modify this document\r\n under the terms of the GNU Free Documentation License, Version 1.3\r\n or any later version published by the Free Software Foundation;\r\n with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts.\r\n A copy of the license is included in the section entitled “GNU\r\n Free Documentation License”.\r\n\r\nIf you have Invariant Sections, Front-Cover Texts and Back-Cover Texts,\r\nreplace the `with...Texts.` line with this:\r\n\r\n with the Invariant Sections being LIST THEIR TITLES, with the\r\n Front-Cover Texts being LIST, and with the Back-Cover Texts being LIST.\r\n\r\nIf you have Invariant Sections without Cover Texts, or some other\r\ncombination of the three, merge those two alternatives to suit the\r\nsituation.\r\n\r\nIf your document contains nontrivial examples of program code, we\r\nrecommend releasing these examples in parallel under your choice of\r\nfree software license, such as the GNU General Public License,\r\nto permit their use in free software.\r\n","google":"UA-49283858-1","note":"Don't delete this file! It's used internally to help with page regeneration."}