NEWS (17564B)
1 Mon Jul 14 2025 05:03:07 PM CEST 2 Released GNU libmicrohttpd 1.0.2. 3 4 This is a bugfix release. 5 It primarily fixes a double-close() bug on bind() errors. 6 7 -- Christian Grothoff 8 9 Fri 23 Feb 2024 21:00:00 UZT 10 Released GNU libmicrohttpd 1.0.1. 11 12 This is a correction release. 13 This release mainly fixes and improves builds with non-default configure 14 parameters. 15 16 -- Evgeny Grin (Karlson2k) 17 18 Thu 01 Feb 2024 15:00:00 CET 19 Released GNU libmicrohttpd 1.0.0. 20 21 This is the first non-bugfix release since version 0.9.75 and the first 22 ever stable release of GNU libmicrohttpd. It is a huge one with new 23 features and fixes. 24 25 The major changes: 26 * Rewritten parsing of clients' requests, fully aligned with current 27 RFCs (9110 and 9112) requirements. Added detailed control of strict 28 or lenient specification enforcement. Application may choose between 29 more compatible mode or more strict and secure mode. 30 * Reworked Digest Auth, greater enhanced support for current RFC 7617 31 features. MHD currently is the only known server-side implementation 32 with support for SHA-512/256, userhash and username in extended 33 notation. At the same time the very old RFC2069 is supported, as 34 well as MD5 and SHA-256. 35 * Improved functionality in multi-threading environment, especially with 36 external sockets polling modes. 37 * Reworked Basic Auth, adding new convenient API functions. 38 * Re-implemented GnuTLS initialisation. Now supported 39 libmicrohttpd-specific system-wide configuration, as well as generic 40 GnuTLS system-wide configuration. Application may adjust settings based 41 on system configuration instead of specifying its own full 42 configuration. 43 * Tons of other new functionality and various fixes. For detailed changes 44 see the ChangeLog or Git commit logs. 45 46 47 Since last non-bugfix release there are 1062 commits added with 48 67007 lines insertions and 26616 deletions. 49 50 -- Evgeny Grin (Karlson2k) 51 52 Sun 28 May 2023 18:00:00 MSK 53 Released GNU libmicrohttpd 0.9.77. 54 55 This is mostly a bugfix release. 56 This version created by taking patches from the current development 57 branch and back-porting them on top of version 0.9.76. 58 The most notable changes are: some improvements for Digest and Basic 59 authorizations, fixed efficiency for TLS upgraded connections, fixed 60 processing of folded headers in requests, fixed functionality with 61 blocking sockets, improved and fixed internal test-suite. 62 63 The more detailed list of the important changes: 64 65 API changes: 66 + Added new function MHD_get_version_bin(). 67 68 Improvements and enhancements: 69 * Digest Auth: changed algorithm identifiers in server generated 70 headers from "md5" / "sha-256" to "MD5" / "SHA-256" to better match 71 RFC (while clients should use caseless matching). 72 * Improved Base64 decoding by new implementation with robust input 73 data validation checks. 74 * Improved configure for cross-compiling, for better compatibility 75 with POSIX and for better compatibility with the latest compiler 76 versions. 77 * New internal tests: for Base64 decoding, Basic Auth and folded 78 headers. 79 * Supported new libcurl API in tests to mute deprecation warnings. 80 * Supported ARM and ARM64 for VC compilers. 81 82 Functionality changes: 83 * any negative number returned by response data generation callback 84 function is treated as an error. Previously negative values except 85 predefined error codes could produce undefined behaviour. 86 * Added handling of "DEBUG" preprocessor macro as an alias of "_DEBUG". 87 88 Fixes: 89 # Fixed functionality with blocking sockets. 90 # Fixed very inefficient data pumping for upgraded TLS connections. 91 # Fixed processing of folded headers in the requests. 92 # Fixed data races when closing upgraded connection. 93 # Removed duplication of "Connection: upgrade" header. 94 # Digest auth: fixed thread sync to avoid "stale hash" results. 95 # Fixed harmless unwanted extra data processing resulting in triggering 96 of the assert. 97 # Fixed tests for LTO. 98 # Removed removed non-portable functions in examples. 99 # Fixed delayed call of connection notification callback in 100 thread-per-connection mode. 101 # Fixed Address Sanitizer unpoison of memory when memory pool is 102 destroyed. This fixed periodic ASAN error when used for a long time 103 with the sanitizer. 104 # Fixed compiler warnings in library code, examples, tests and configure 105 checks. 106 # New TLS certificates for test-suite: all with SAN fields and SHA-256 107 hash. 108 # Tests: fixed tests on Darwin 22.x (Ventura). 109 # Tests: redesigned one tests group to avoid stress-testing of the OS. 110 111 -- Evgeny Grin (Karlson2k) 112 113 Sun 26 Feb 2023 17:49:30 CET 114 Released GNU libmicrohttpd 0.9.76 hotfix. -CG 115 116 This is a hotfix release. 117 This only change since previous release is fixed potential DoS vector 118 in MHD_PostProcessor discovered by Gynvael Coldwind and Dejan 119 Alvadzijevic (CVE-2023-27371). 120 While the researchers have not been able to exploit this attack vector 121 when libmicrohttpd is compiled with the standard GNU C library, it is 122 recommended that you update MHD as soon as possible if your 123 applications are using (optional) MHD_PostProcessor functionality. 124 125 -- Evgeny Grin (Karlson2k) 126 127 Sun 26 Dec 2021 20:30:00 MSK 128 Released GNU libmicrohttpd 0.9.75 -EG 129 130 This is a correction release. 131 The main improvement is the implementation of workaround for some 132 OSes (like OpenBSD 7) where "monotonic" clock may jump back. Now 133 MHD is able to automatically detect such situation and recover if 134 the jump is small. This workaround is needed with increased 135 accuracy of connection timeout introduced in previous version, as 136 with lower accuracy (v0.9.73 and before) these jumpbacks were 137 unnoticeable. 138 Other changes: fixed some compiler, Makefile, and configure 139 warnings on specific platforms; one test further improved. 140 141 -- Evgeny Grin (Karlson2k) 142 143 144 Sun 19 Dec 2021 18:30:00 MSK 145 Released GNU libmicrohttpd 0.9.74 146 147 This release brings a lot of fixes and improvements, and 148 important new features. 149 The most significant addition is the new experimental 150 implementation of WebSockets contributed by David Gausmann. This 151 implementation is not fully tested yet so currently it is disabled 152 by default. 153 Other changes include a lot of improvements and clarifications 154 in doxy comments in microhttpd.h header file, improved compliance 155 with the RFC HTTP specifications, the new implementation of reply 156 header forming, the new implementation of request chunked encoding 157 parsing, new automatic error replies, internal optimisations, and 158 many important fixes, including fixes for long-standing bugs. 159 160 More detailed list of notable changes: 161 162 API changes: 163 + Added new function MHD_get_reason_phrase_len_for(). 164 + Added MHD_CONNECTION_INFO_HTTP_STATUS type of information 165 queried by MHD_get_connection_info(). 166 + Added new response flag MHD_RF_SEND_KEEP_ALIVE_HEADER to force 167 sending of "keep-alive" header even if not required by RFC. 168 + Added new response creation function 169 MHD_create_response_from_buffer_with_free_callback_cls() with 170 custom cleanup callback. 171 + Added new response flag MHD_RF_HTTP_1_0_COMPATIBLE_STRICT with 172 the same functionality as existing MHD_RF_HTTP_VERSION_1_0_ONLY 173 flag. The old flag will be deprecated. 174 + Added new response flag MHD_RF_HTTP_1_0_SERVER with the same 175 functionality as existing MHD_RF_HTTP_VERSION_1_0_RESPONSE flag. 176 The old flag will be deprecated. 177 178 New features: 179 + Added experimental WebSockets extension with separate header. 180 Disabled by default as it is not fully tested yet. 181 + Added '--enable-sanitizers[=address,undefined,leak,user-poison]' 182 configure parameter (instead of '--enable-sanitizer'), 183 implemented custom memory poisoning for memory pools. 184 185 Improvements and enhancements: 186 * Doxy function descriptions was corrected, clarified, extended, 187 and improved. Now it should be much easier to learn MHD just by 188 reading the headers. 189 * Completely rewritten reply header forming. New implementation is 190 more robust, simpler maintainable and expandable, and better 191 follows RFC HTTP specifications. 192 * Performance improvements: now HTTP version and request method are 193 decoded one time only (previously MHD used string comparison many 194 times during processing the data). 195 * Rewritten request chunked payload decoding. The new 196 implementation better conforms to the HTTP RFC, detects format 197 problems earlier, replies to the clients with description of 198 detected problems, handles untypical (but syntactically correct) 199 values properly. 200 * Added special replies for wrong/unsupported HTTP versions in 201 requests, broken HTTP chunked encoding in requests, 202 * As required by HTTP RFC, added automatic error replies if client 203 used broken chunked encoding, too large chunk size, too large 204 payload size, or broken Content-Length header. 205 * Optimized connection's memory pool handling. 206 * Changed timeout precision from one second to one millisecond. 207 * Added some checks for incorrect user data, reporting problems in 208 MHD log. 209 * Improved performance of hash calculations functions by using 210 compiler built-ins (if available). 211 * Implemented SHA-1 calculations (required for WebSockets). 212 * Added universal MSVC project that works with any (sufficiently 213 new) version of MSVC. 214 * Developed simple HTTP client to test MHD under very special 215 conditions. 216 * Implemented 45 new tests. 217 * Improved existing tests to test more aspects of MHD. 218 * Added check for correct results of system and libcurl functions. 219 * Response headers are checked during forming of responses. 220 * HTTPS tests were improved. 221 * Added rebuild on W32 of all required files if files are missing. 222 * Many internal optimisations and improvements. 223 224 Functionality changes: 225 * Keep-alive header is omitted by default for HTTP/1.1 connections. 226 Use of header can be enforced by response flag. 227 * Chunked encoding is used for HTTP/1.1 non-keep-alive connections 228 for responses with unknown size. Previously MHD used "indication 229 of the end of the response by closing connection" in such cases, 230 however it is not correct for HTTP/1.1 connections as per HTTP 231 RFC. 232 * As required by HTTP RFC, use HTTP/1.1 version instead of HTTP/1.0 233 in reply headers when client is HTTP/1.0 . HTTP/1.0 version can 234 be enforced by response flag. 235 * User response headers are used in replies in the same order as 236 was added by application. 237 * Allowed tab characters in response header values. 238 * All custom "Connection:" response headers are automatically 239 combined into single "Connection:" header. 240 * "keep-alive" token silently dropped from custom "Connection:" 241 response header. "Keep-alive" cannot be enforced and used 242 automatically if possible. 243 * Allow tab character in custom response header value. 244 * Disallow space character in custom response header value. 245 * Do not allow responses with 1xx codes for HTTP/1.0 requests. 246 * Detected and reported incorrect "Upgrade" responses. 247 * W32 targets are changed to Vista+ by default. XP is supported 248 still. 249 250 Fixes: 251 # Fixed short busy-waiting (up to one second) when connection is 252 going to be expired and closed. 253 # Fixed handling of errors during start of new connection, fixed 254 inability to accept new connections in thread-per-connection mode 255 due to the missing decrement of number of daemon's connections if 256 start of new thread is failed. 257 # Fixed incorrect parsing of LFLF, LFCR, CRCR, and bare CR as 258 single linefeed in request header and request chunked payload. 259 Now only CRLF or bare LF are recognized as linefeed. 260 # Fixed response chunked encoding handling. Now it works properly 261 with non-keep-alive connection, with fixed size replies (if 262 chunked was enforced by header), and in other situations. 263 # Other fixes for chunked replies. 264 # Fixed handling of custom connection timeout in thread-per- 265 connection mode. 266 # Fixed wrongly used MHD_REQUEST_TERMINATED_COMPLETED_OK code for 267 application notification when MHD_REQUEST_TERMINATED_WITH_ERROR 268 code must be used. 269 # Fixed code MHD_REQUEST_TERMINATED_READ_ERROR not reported (code 270 MHD_REQUEST_TERMINATED_WITH_ERROR was incorrectly used instead). 271 # Fixed handling of request chunked encoding with untypical 272 formatting. 273 # Fixed processing of last part of hex-encoded values under 274 certain conditions. 275 # Fixed value returned for MHD_CONNECTION_INFO_REQUEST_HEADER_SIZE. 276 # Fixed returned value for MHD_FEATURE_AUTOSUPPRESS_SIGPIPE on W32, 277 now it is MHD_YES as W32 does not need SIGPIPE suppression. 278 # Fixed portability of bitwise NOT for enums values. 279 # Fixed SHA-256 and MD5 calculations with unaligned data. 280 # Fixed incorrect caseless matching for HTTP version. 281 # Fixed incorrect caseless matching for request method. 282 # Fixed compatibility with old GnuTLS versions. 283 # Fixed compiler warnings on 32-bits platforms. 284 # Fixed blocking sockets setting in tests and examples for W32. 285 # Fixed examples to really use libmagic if present. 286 # HTTPS tests were fixed. 287 # Fixed libcurl test with case-insensitive match for HTTP methods, 288 method names must use case-sensitive match. 289 # Fixed tests compatibility with old libcurl versions. 290 # Fixed build on W32 with llvm-dlltool (this tool is too 291 oversimplified) 292 293 -- Evgeny Grin (Karlson2k) 294 295 296 Sun 25 Apr 2021 14:00:00 MSK 297 Released GNU libmicrohttpd 0.9.73 298 299 This release brings new features, improvements, and a few fixes. 300 The most important addition is the new function for vector-backed 301 responses, based on the patch contributed by NASA engineers. 302 Other changes include compatibility with autoconf 2.70+, improved 303 testsuite compatibility with CI systems, fixed and improved MSVC 304 builds, and implementation of ALPN support. 305 306 More detailed list of notable changes: 307 308 API changes: 309 + Added new function MHD_create_response_from_iovec(), based on the 310 patch provided by Lawrence Sebald and Damon N. Earp from NASA. 311 + Added MHD_OPTION_SIGPIPE_HANDLED_BY_APP daemon option. 312 + Added new function MHD_run_wait(). 313 + Added MHD_OPTION_TLS_NO_ALPN to disable usage of ALPN even if 314 it is supported by TLS library. 315 316 New features: 317 + Added '--enable-heavy-tests' configure parameter (disabled by 318 default). 319 + Implemented support for ALPN. 320 321 Improvements and enhancements: 322 * Return timeout of zero also for connections awaiting cleanup. 323 * Compatibility with autoconf >=2.70, used new autoconf features. 324 * Warn user when custom logger option is not the first option. 325 * Added information to the header about minimal MHD version when 326 particular symbols were introduced. 327 * Updated test certificates to be compatible with modern browsers. 328 * Added on-fly detection of UNIX domain sockets and pipes, MHD does 329 not try to use TCP/IP-specific socket options on them. 330 * Report more detailed error description in the MHD log for send 331 and receive errors. 332 * Enabled bind port autodetection for MSVC builds. 333 334 Fixes: 335 # Fix PostProcessor to always properly stop iteration when 336 application callback tells it to do so. 337 # Fixed MD5 digest authorization broken when compiled without 338 variable length arrays support (notably with MSVC). 339 # Fixed detection of type of send errors on W32. 340 341 -- Evgeny Grin (Karlson2k) 342 343 344 Mon 28 Dec 2020 21:36:00 MSK 345 Released GNU libmicrohttpd 0.9.72 346 347 This release is mostly a bugfix release, with greatly improved 348 compatibility with various OSes/kernels, including FreeBSD, Windows, 349 OpenBSD, NetBSD, Darwin (macOS), Solaris. Performance is improved, 350 especially with HTTPS connections and stay-alive HTTP connections. 351 352 Notable changes since version 0.9.71: 353 354 API changes: 355 + New function MHD_create_response_from_pipe() 356 357 Improvements and enhancements: 358 * Fully rewritten code for buffering/pushing from kernel network buffers 359 for compatibility with various OSes. Reduced number of additional 360 sys-calls, network is better utilized, responses are delivered faster. 361 * Restored optimal sendfile() usage on FreeBSD. 362 * MHD now takes care about SIGPIPE handling by blocking it in internal 363 threads and avoiding functions (like sendfile()) that could generate 364 SIGPIPE when blocking of this signal is not possible. 365 366 Fixes: 367 # Fixed crash in PostProcessor. 368 # Fixed several resources leaks in corner cases. 369 # Improved thread sync, thread safety and fixed one use-after-free under 370 special conditions during stopping of daemon. 371 # Updated HTTP status codes, header names and methods from the 372 registries. 373 # Fixed functioning without listen socket and with internal threads. 374 # Fixed streaming of chunked responses for both HTTP and HTTPS. 375 # Various compatibility fixes. 376 377 -- Evgeny Grin (Karlson2k) 378 379 380 Tue Jan 9 20:52:48 MST 2007 381 Project posted.