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29 <h1 class="SECT1"><a name="COPYRIGHT" id="COPYRIGHT">12. Privoxy Copyright, License and History</a></h1>
30 <p>Copyright © 2001-2018 by Privoxy Developers <code class="EMAIL"><<a href=
31 "mailto:privoxy-devel@lists.privoxy.org">privoxy-devel@lists.privoxy.org</a>></code></p>
32 <p>Some source code is based on code Copyright © 1997 by Anonymous Coders and Junkbusters, Inc. and licensed
33 under the <i class="CITETITLE">GNU General Public License</i>.</p>
34 <p><span class="APPLICATION">Privoxy</span> is free software; you can redistribute it and/or modify it under the
35 terms of the <i class="CITETITLE">GNU General Public License</i>, version 2, as published by the Free Software
36 Foundation and included in the next section.</p>
38 <h2 class="SECT2"><a name="LICENSE" id="LICENSE">12.1. License</a></h2>
39 <table border="0" bgcolor="#E0E0E0" width="100%">
42 <pre class="SCREEN"> GNU GENERAL PUBLIC LICENSE
45 Copyright (C) 1989, 1991 Free Software Foundation, Inc.,
46 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
47 Everyone is permitted to copy and distribute verbatim copies
48 of this license document, but changing it is not allowed.
52 The licenses for most software are designed to take away your
53 freedom to share and change it. By contrast, the GNU General Public
54 License is intended to guarantee your freedom to share and change free
55 software--to make sure the software is free for all its users. This
56 General Public License applies to most of the Free Software
57 Foundation's software and to any other program whose authors commit to
58 using it. (Some other Free Software Foundation software is covered by
59 the GNU Lesser General Public License instead.) You can apply it to
62 When we speak of free software, we are referring to freedom, not
63 price. Our General Public Licenses are designed to make sure that you
64 have the freedom to distribute copies of free software (and charge for
65 this service if you wish), that you receive source code or can get it
66 if you want it, that you can change the software or use pieces of it
67 in new free programs; and that you know you can do these things.
69 To protect your rights, we need to make restrictions that forbid
70 anyone to deny you these rights or to ask you to surrender the rights.
71 These restrictions translate to certain responsibilities for you if you
72 distribute copies of the software, or if you modify it.
74 For example, if you distribute copies of such a program, whether
75 gratis or for a fee, you must give the recipients all the rights that
76 you have. You must make sure that they, too, receive or can get the
77 source code. And you must show them these terms so they know their
80 We protect your rights with two steps: (1) copyright the software, and
81 (2) offer you this license which gives you legal permission to copy,
82 distribute and/or modify the software.
84 Also, for each author's protection and ours, we want to make certain
85 that everyone understands that there is no warranty for this free
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87 want its recipients to know that what they have is not the original, so
88 that any problems introduced by others will not reflect on the original
91 Finally, any free program is threatened constantly by software
92 patents. We wish to avoid the danger that redistributors of a free
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97 The precise terms and conditions for copying, distribution and
100 GNU GENERAL PUBLIC LICENSE
101 TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
103 0. This License applies to any program or other work which contains
104 a notice placed by the copyright holder saying it may be distributed
105 under the terms of this General Public License. The "Program", below,
106 refers to any such program or work, and a "work based on the Program"
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110 language. (Hereinafter, translation is included without limitation in
111 the term "modification".) Each licensee is addressed as "you".
113 Activities other than copying, distribution and modification are not
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115 running the Program is not restricted, and the output from the Program
116 is covered only if its contents constitute a work based on the
117 Program (independent of having been made by running the Program).
118 Whether that is true depends on what the Program does.
120 1. You may copy and distribute verbatim copies of the Program's
121 source code as you receive it, in any medium, provided that you
122 conspicuously and appropriately publish on each copy an appropriate
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124 notices that refer to this License and to the absence of any warranty;
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128 You may charge a fee for the physical act of transferring a copy, and
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148 notice that there is no warranty (or else, saying that you provide
149 a warranty) and that users may redistribute the program under
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155 These requirements apply to the modified work as a whole. If
156 identifiable sections of that work are not derived from the Program,
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159 sections when you distribute them as separate works. But when you
160 distribute the same sections as part of a whole which is a work based
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162 this License, whose permissions for other licensees extend to the
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175 3. You may copy and distribute the Program (or a work based on it,
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177 Sections 1 and 2 above provided that you also do one of the following:
179 a) Accompany it with the complete corresponding machine-readable
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211 compelled to copy the source along with the object code.
213 4. You may not copy, modify, sublicense, or distribute the Program
214 except as expressly provided under this License. Any attempt
215 otherwise to copy, modify, sublicense or distribute the Program is
216 void, and will automatically terminate your rights under this License.
217 However, parties who have received copies, or rights, from you under
218 this License will not have their licenses terminated so long as such
219 parties remain in full compliance.
221 5. You are not required to accept this License, since you have not
222 signed it. However, nothing else grants you permission to modify or
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245 may not distribute the Program at all. For example, if a patent
246 license would not permit royalty-free redistribution of the Program by
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251 If any portion of this section is held invalid or unenforceable under
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264 to distribute software through any other system and a licensee cannot
267 This section is intended to make thoroughly clear what is believed to
268 be a consequence of the rest of this License.
270 8. If the distribution and/or use of the Program is restricted in
271 certain countries either by patents or by copyrighted interfaces, the
272 original copyright holder who places the Program under this License
273 may add an explicit geographical distribution limitation excluding
274 those countries, so that distribution is permitted only in or among
275 countries not thus excluded. In such case, this License incorporates
276 the limitation as if written in the body of this License.
278 9. The Free Software Foundation may publish revised and/or new versions
279 of the General Public License from time to time. Such new versions will
280 be similar in spirit to the present version, but may differ in detail to
281 address new problems or concerns.
283 Each version is given a distinguishing version number. If the Program
284 specifies a version number of this License which applies to it and "any
285 later version", you have the option of following the terms and conditions
286 either of that version or of any later version published by the Free
287 Software Foundation. If the Program does not specify a version number of
288 this License, you may choose any version ever published by the Free Software
291 10. If you wish to incorporate parts of the Program into other free
292 programs whose distribution conditions are different, write to the author
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294 Software Foundation, write to the Free Software Foundation; we sometimes
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297 of promoting the sharing and reuse of software generally.
301 11. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY
302 FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW. EXCEPT WHEN
303 OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES
304 PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED
305 OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
306 MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE ENTIRE RISK AS
307 TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU. SHOULD THE
308 PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING,
309 REPAIR OR CORRECTION.
311 12. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
312 WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR
313 REDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES,
314 INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING
315 OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED
316 TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY
317 YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER
318 PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE
319 POSSIBILITY OF SUCH DAMAGES.
321 END OF TERMS AND CONDITIONS
323 How to Apply These Terms to Your New Programs
325 If you develop a new program, and you want it to be of the greatest
326 possible use to the public, the best way to achieve this is to make it
327 free software which everyone can redistribute and change under these terms.
329 To do so, attach the following notices to the program. It is safest
330 to attach them to the start of each source file to most effectively
331 convey the exclusion of warranty; and each file should have at least
332 the "copyright" line and a pointer to where the full notice is found.
334 <one line to give the program's name and a brief idea of what it does.>
335 Copyright (C) <year> <name of author>
337 This program is free software; you can redistribute it and/or modify
338 it under the terms of the GNU General Public License as published by
339 the Free Software Foundation; either version 2 of the License, or
340 (at your option) any later version.
342 This program is distributed in the hope that it will be useful,
343 but WITHOUT ANY WARRANTY; without even the implied warranty of
344 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
345 GNU General Public License for more details.
347 You should have received a copy of the GNU General Public License along
348 with this program; if not, write to the Free Software Foundation, Inc.,
349 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
351 Also add information on how to contact you by electronic and paper mail.
353 If the program is interactive, make it output a short notice like this
354 when it starts in an interactive mode:
356 Gnomovision version 69, Copyright (C) year name of author
357 Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
358 This is free software, and you are welcome to redistribute it
359 under certain conditions; type `show c' for details.
361 The hypothetical commands `show w' and `show c' should show the appropriate
362 parts of the General Public License. Of course, the commands you use may
363 be called something other than `show w' and `show c'; they could even be
364 mouse-clicks or menu items--whatever suits your program.
366 You should also get your employer (if you work as a programmer) or your
367 school, if any, to sign a "copyright disclaimer" for the program, if
368 necessary. Here is a sample; alter the names:
370 Yoyodyne, Inc., hereby disclaims all copyright interest in the program
371 `Gnomovision' (which makes passes at compilers) written by James Hacker.
373 <signature of Ty Coon>, 1 April 1989
374 Ty Coon, President of Vice
376 This General Public License does not permit incorporating your program into
377 proprietary programs. If your program is a subroutine library, you may
378 consider it more useful to permit linking proprietary applications with the
379 library. If this is what you want to do, use the GNU Lesser General
380 Public License instead of this License.
387 <h2 class="SECT2"><a name="HISTORY" id="HISTORY">12.2. History</a></h2>
388 <p>A long time ago, there was the <span class="APPLICATION">Internet Junkbuster</span>, by Anonymous Coders and
389 Junkbusters Corporation. This saved many users a lot of pain in the early days of web advertising and user
391 <p>But the web, its protocols and standards, and with it, the techniques for forcing ads on users, give up
392 autonomy over their browsing, and for tracking them, keeps evolving. Unfortunately, the <span class=
393 "APPLICATION">Internet Junkbuster</span> did not. Version 2.0.2, published in 1998, was the last official
394 release, available from Junkbusters Corporation. Fortunately, it had been released under the GNU <a href=
395 "http://www.gnu.org/licenses/old-licenses/gpl-2.0.html" target="_top">GPL</a>, which allowed further development
397 <p>So Stefan Waldherr started maintaining an improved version of the software, to which eventually a number of
398 people contributed patches. It could already replace banners with a transparent image, and had a first version of
399 pop-up killing, but it was still very closely based on the original, with all its limitations, such as the lack
400 of HTTP/1.1 support, flexible per-site configuration, or content modification. The last release from this effort
401 was version 2.0.2-10, published in 2000.</p>
402 <p>Then, some <a href="https://www.privoxy.org/user-manual/copyright.html#AUTHORS" target="_top">developers</a>
403 picked up the thread, and started turning the software inside out, upside down, and then reassembled it, adding
404 many <a href="https://www.privoxy.org/user-manual/introduction.html#FEATURES" target="_top">new features</a>
406 <p>The result of this is <span class="APPLICATION">Privoxy</span>, whose first stable version, 3.0, was released
408 <p>As of 2012 the Junkbusters Corporation's website (http://www.junkbusters.com/) has been shut down, but Privoxy
409 is still actively maintained.</p>
412 <h2 class="SECT2"><a name="AUTHORS" id="AUTHORS">12.3. Authors</a></h2>
413 <p>Current Privoxy Team:</p>
414 <p class="LITERALLAYOUT"> Fabian Keil, lead developer<br>
415 David Schmidt<br>
416 Lee Rian<br>
417 Roland Rosenfeld<br>
418 Ian Silvester</p>
419 <p>Former Privoxy Team Members:</p>
420 <p class="LITERALLAYOUT"> Johny Agotnes<br>
421 Rodrigo Barbosa<br>
422 Moritz Barsnick<br>
423 Hal Burgiss<br>
424 Ian Cummings<br>
425 Brian Dessent<br>
426 Jon Foster<br>
427 Karsten Hopp<br>
428 Alexander Lazic<br>
429 Daniel Leite<br>
430 Gábor Lipták<br>
431 Adam Lock<br>
432 Guy Laroche<br>
433 Justin McMurtry<br>
434 Mark Miller<br>
435 Gerry Murphy<br>
436 Andreas Oesterhelt<br>
437 Haroon Rafique<br>
438 Georg Sauthoff<br>
439 Thomas Steudten<br>
440 Jörg Strohmayer<br>
441 Rodney Stromlund<br>
442 Sviatoslav Sviridov<br>
443 Sarantis Paskalis<br>
444 Stefan Waldherr</p>
445 <p>Thanks to the many people who have tested Privoxy, reported bugs, provided patches, made suggestions, donated
446 or contributed in some other way. These include (in alphabetical order):</p>
447 <p class="LITERALLAYOUT"> Rustam Abdullaev<br>
448 Clint Adams<br>
449 Anatoly Arzhnikov<br>
450 Ken Arromdee<br>
451 Natxo Asenjo<br>
452 Devin Bayer<br>
453 Havard Berland<br>
454 David Binderman<br>
455 David Bo<br>
456 Gergely Bor<br>
457 Francois Botha<br>
458 Reiner Buehl<br>
459 Andrew J. Caines<br>
460 Clifford Caoile<br>
461 Edward Carrel<br>
462 Pak Chan<br>
463 Wan-Teh Chang<br>
464 Sam Chen<br>
465 Ramkumar Chinchani<br>
466 Billy Crook<br>
467 Frédéric Crozat<br>
468 Matthew Daley<br>
469 Michael T. Davis<br>
470 Markus Dittrich<br>
471 Mattes Dolak<br>
472 Matthias Drochner<br>
473 Peter E.<br>
474 Florian Effenberger<br>
475 Markus Elfring<br>
476 Ryan Farmer<br>
477 Matthew Fischer<br>
478 Dean Gaudet<br>
479 Stephen Gildea<br>
480 John McGowan<br>
481 Danny Goossen<br>
482 Lizik Grelier<br>
483 Daniel Griscom<br>
484 Felix Gröbert<br>
485 Bernard Guillot<br>
486 Jeff H.<br>
487 Tim H.<br>
488 Aaron Hamid<br>
489 Darel Henman<br>
490 Magnus Holmgren<br>
491 Eric M. Hopper<br>
492 Ralf Horstmann<br>
493 Stefan Huehner<br>
494 Basil Hussain<br>
495 Peter Hyman<br>
496 Derek Jennings<br>
497 Andrew Jones<br>
498 Julien Joubert<br>
499 Ralf Jungblut<br>
500 Petr Kadlec<br>
501 Robert Klemme<br>
502 Steven Kolins<br>
504 Stefan Kurtz<br>
505 Zeno Kugy<br>
506 David Laight<br>
507 Bert van Leeuwen<br>
508 Don Libes<br>
509 Paul Lieverse<br>
510 Han Liu<br>
511 Toby Lyward<br>
512 Wil Mahan<br>
513 Jindrich Makovicka<br>
514 Raphael Marichez<br>
515 Francois Marier<br>
516 Angelina Matson<br>
517 Jonathan McKenzie<br>
518 David Mediavilla<br>
519 Raphael Moll<br>
520 J. Momberger<br>
521 Mathew Murphy<br>
522 Amuro Namie<br>
523 Mark Nelson<br>
524 Tobias Netzel<br>
525 Adam Piggott<br>
526 Petr Písar<br>
527 Dan Price<br>
528 Roberto Ragusa<br>
529 Félix Rauch<br>
530 Kai Raven<br>
531 Marvin Renich<br>
532 Chris John Riley<br>
533 Maynard Riley<br>
534 Andreas Rutkauskas<br>
535 Bart Schelstraete<br>
536 Gregory Seidman<br>
537 Atman Sense<br>
538 Chung-chieh Shan<br>
539 Johan Sintorn<br>
540 Benjamin C. Wiley Sittler<br>
541 Simon South<br>
542 Dan Stahlke<br>
543 Oliver Stoeneberg<br>
544 Rick Sykes<br>
545 Spinor S.<br>
546 Peter Thoenen<br>
547 Marc Thomas<br>
548 Martin Thomas<br>
549 Reuben Thomas<br>
550 Guybrush Threepwood<br>
551 Joel Verhagen<br>
552 Bobby G. Vinyard<br>
553 Jochen Voss<br>
554 David Wagner<br>
555 Glenn Washburn<br>
556 Song Weijia<br>
557 Jörg Weinmann<br>
558 Darren Wiebe<br>
559 Anduin Withers<br>
560 Eduard Wulff<br>
561 Yang Xia<br>
562 Jarry Xu<br>
563 Oliver Yeoh<br>
564 Yossi Zahn<br>
565 Jamie Zawinski</p>
566 <p>Privoxy is based in part on code originally developed by Junkbusters Corp. and Anonymous Coders.</p>
567 <p>Privoxy heavily relies on Philip Hazel's PCRE.</p>
568 <p>The code to filter compressed content makes use of zlib which is written by Jean-loup Gailly and Mark
570 <p>On systems that lack snprintf(), Privoxy is using a version written by Mark Martinec. On systems that lack
571 strptime(), Privoxy is using the one from the GNU C Library written by Ulrich Drepper.</p>
574 <div class="NAVFOOTER">
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583 <td width="33%" align="left" valign="top">Contacting the Developers, Bug Reporting and Feature Requests</td>
584 <td width="34%" align="center" valign="top"> </td>
585 <td width="33%" align="right" valign="top">See Also</td>