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Introduction

LibCGI is a simple to use yet powerful library written from scratch to assist in the making of CGI appliactions in C. It has support for string manipulation, linked lists, cookies, sessions, GET and POST methods and more.

It was my first Open Source project, somewhere back in the 2000s and somethings. Originally it was hosted at Sourceforge.

Building

LibCGI is built with CMake. One quick way:

  • create a build directory and change into it

      mkdir build
  cd build

  • call cmake

      cmake ..

  • build it

      make

Of course every other way CMake provides would also work, see CMake documentation.

TODO

Well, I am keeping this TODO list here for historical (and funny) reasons. Nowadays I don't have any plans to enhance or change anything.

  • Template Engine
  • Mime functions
  • Encrypted session
  • Memory Management functions
  • Code speed ups
  • Other miscellaneous functions
  • Win32 port? ( who wants it? )

Changelog

Version 1.3.0

2018-07-24

  • Fix spelling mistakes all over the code

2018-11-12

2018-11-13

  • Move type definitions to separate header file

2018-11-16

  • Improve documentation of several session related functions
  • Introduce new session error code and use to test on invalid parameters passed to functions

Version 1.2.0

Thanks to Alexander Dahl, D Frost, Thomas Petazzoni

2015-03-26

  • Add new API function cgi_redirect_status() and deprecate old one

2015-04-23

  • Improvements to ltrim() and rtrim()

2016-05-12

  • Introduce unit tests with CTest

2016-05-18

  • Fix possible segfaults in list implementation (#31)

2017-02-16

  • Added API function to free session internals (#25)
  • Reset session initialized flag (#33)

2017-09-03

  • Fixes on CMake to build as C only project and as shared or static lib, contributed by Buildroot

2018-07-11

  • More fixes on CMake build, modern approach

2018-07-12

  • Fix include paths in examples

2018-07-13

  • Mark function md5() as deprecated and compile md5.c again (#15)

2018-07-14

  • Add new API function cgi_version()

2018-07-16

  • Move header files to separate directory

2018-07-20

  • Fix possible segfault in cgi_unescape_special_chars()

Version 1.1

Thanks to Alexander Dahl, D Frost, Rafael Steil, Michael Olbrich, Robert Schwebel

After moving the source to GitHub in 2011 this release contains numerous changes from 2012 up to 2016, while still keeping the old API. Consider this a maintenance release which still has lots of flaws. This is a short summary of changes, for more details you can now use the Git history.

  • Applied bugfixes from Debian and ptxdist
  • Added LICENSE file
  • Fixed several memory leaks
  • Optimized speed
  • Corrected declarations
  • Removed some compiler warnings
  • Fixed sessions when using redirects (#19)
  • Fixed possible segmentation faults in slist implementation (#24)
  • Switched build system to CMake (#27)

Version 1.0

Thanks to James Marjie, Mitch, Tamas Sarlos, Luis Figueiredo, Oliver Schlag and Sverre H. Huseby

2003-06-03

  • Fixed a possible memory problem in htmlentities() function

2003-08-19

  • Changed md5 suport. No external libs needed anymore

2003-09-05

  • Renamed list_* functions to slist_* ( 's' of 'single' )

2003-09-10

  • Some quick fixes to fs functions

2003-12-05

  • Moved to va_copy() instead direct variable reference copy
  • Removed hard-coded program names from Makefile.in ( gcc and ar )

2003-12-15

  • Fixed many CRLF issues ( were just LF instead CRLF )
  • Some header files reorganization
  • Fixed the examples ( deprecated things )

Version 0.8.2

Thanks to Tonu Samuel

2003-01-10

  • Fixed some pointer manipulation bugs in list.c and cgi.c

Version 0.8.1

Thanks to Oliver Schlag, Tommy, Diogo Gonzaga, Robert Csok

2002-12-27

  • Some changes in the documentation
  • New source tree
  • Added make_string function

2002-12-26

  • Added md5 function
  • Added recvline function

2002-12-06

  • Fixed a small string check bug in explode() function

2002-10-28

  • Now compiles well under Solaris
  • getline() function is no longer necessary. Implemented my own way to read from session files.

Version 0.8.0

Thanks to Hao Yu, Rainer Huobert, Zentara, Dennis Reichel, Tony Hansen, Jakub Skopal

2002-10-19

  • Rewritten process_data() function.

2002-07-15

  • Added addslashes() function to cgi.c ( was missing )

2002-07-04

  • Fixed Makefile to correctly include error.o when compiling libcgi.a
  • Fixed process_data() function to prevent bad-formed %xx data

2002-09-21

  • Fixed pointer manipulation problems in base64.c
  • Added support to C++

2002-07-02

  • Fixed many warnings messages

Version 0.7.5

2002-06-29

  • Fixed a bug in cgi_session_start()
  • Added cgi_session_save_path() function
  • Added cgi_session_cookie_name() function

2002-06-14

  • Fixed cgi_cookie_add() to correctly handle cookie expiration times

2002-06-13

  • Revised session manipulation functions
  • Code cleanups

2002-06-11

  • Rewritten strpos() function.
  • Added strnpos() function

2002-06-09

  • Updated explode() function
  • New examples

2002-06-08

  • Updated htmlentities() function
  • Added str_base64_encode() and str_base64_decode() functions

2002-06-06

  • Fixed a small bug in cgi_unescape_special_chars()
  • Fixed process_data() function to handle %xx ( hexa chars ) correctly
  • New cgi_include() function

Version 0.7.4

Thanks to Andre 'pXd'

2002-06-05

  • Release with know bugs
  • Fixed a memory leak at process_data() function
  • Fixed an incorrect parser when there was only one parameter in the URL
  • Droped redundante calls to sizeof() when using malloc()

2002-05-12

  • Code cleanups
  • Dropped some documentation
  • Examples revised and updated

Version 0.7.3

2002-04-14

  • Code revision
  • header files rewritten
  • Added cgi_send_header() function

Version 0.7.2

Special thanks to Erik Jansson and Robert Csok

2002-03-25

  • Due to a little bug, cgi_include() was dropped to its original version

2002-03-22

  • Examples revised

2002-03-21

  • Added str_nreplace() function
  • Changed replace() to str_replace()
  • Added stripnslashes() function
  • Documentation updated

2002-03-20

  • New documentation
  • Added cgi_ to many function names
  • Added addnslashes() function

2002-03-13

  • Added htmlentities() function

2002-03-12

  • Fixed another bug at process_data() function that caused more than necessary characters to be copied

2002-03-11

  • Fixed a memory leak in cgi_process_form() function
  • Changed init_hex_table() function to use memset() insted for() loop to fill the array

2002-03-10

  • Fixed a format bug in cgi_include() function
  • Fixed a bug in process_data() function that caused some characters to be incorrectly handled
  • Improved cgi_include() function performance

2002-03-04

  • Added ltrim(), rtrim() and trim() functions

Version 0.7.1

2002-01-??

  • A bug in sess_file_rewrite() that caused application to crash was fixed

Version 0.7

Special thanks to ZE bennyben

2002-01-??

  • Session support major updates
  • Some memory leaks and String manipulation bugs fixed
  • Removed debug() funciont and #define's relacted
  • Added libcgi_error() for internal error handling
  • Source code tree modified
  • Header files better written
  • More examples
  • Documentation updated

Version 0.1 update 6

Special thanks to Marcio Kuchma

2001-12-17

  • pt_BR documentation, Makefile rewritten, minor improvements

Version 0.1 update 5

2001-11-14

  • A friend told me about a paper that describes ways to crack session id's.. I know that my session support ( file session.c ) is really unstable...

2001-11-12

  • Modified strpos() function. Now you can specify the number of the characters to match

Version 0.1 update 4

2001-11-10

  • Finished the script to process XML documentation

2001-11-10

  • Changed Makefile. Now it shows the make options

Version 0.1 update 3

2001-11-06

  • Added file() function

Version 0.1 update 2

2001-01-11

  • Finished documentation in XML format

Version 0.1 update 1

2001-10-??

  • Makefile fixed. Now it's more simple

Version 0.1

2001-10-??

  • First non-oficial release