microhttpd.h

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/*
     This file is part of libmicrohttpd
     Copyright (C) 2006-2021 Christian Grothoff (and other contributing authors)
     Copyright (C) 2014-2023 Evgeny Grin (Karlson2k)

     This library is free software; you can redistribute it and/or
     modify it under the terms of the GNU Lesser General Public
     License as published by the Free Software Foundation; either
     version 2.1 of the License, or (at your option) any later version.

     This library is distributed in the hope that it will be useful,
     but WITHOUT ANY WARRANTY; without even the implied warranty of
     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
     Lesser General Public License for more details.

     You should have received a copy of the GNU Lesser General Public
     License along with this library; if not, write to the Free Software
     Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
*/

#ifndef MHD_MICROHTTPD_H
#define MHD_MICROHTTPD_H

#ifdef __cplusplus
extern "C"
{
#if 0                           /* keep Emacsens' auto-indent happy */
}
#endif
#endif


#define MHD_VERSION 0x01000100

/* If generic headers don't work on your platform, include headers
   which define 'va_list', 'size_t', 'ssize_t', 'intptr_t', 'off_t',
   'uint8_t', 'uint16_t', 'int32_t', 'uint32_t', 'int64_t', 'uint64_t',
   'struct sockaddr', 'socklen_t', 'fd_set' and "#define MHD_PLATFORM_H" before
   including "microhttpd.h". Then the following "standard"
   includes won't be used (which might be a good idea, especially
   on platforms where they do not exist).
   */
#ifndef MHD_PLATFORM_H
#if defined(_WIN32) && ! defined(__CYGWIN__) && \
  ! defined(_CRT_DECLARE_NONSTDC_NAMES)
/* Declare POSIX-compatible names */
#define _CRT_DECLARE_NONSTDC_NAMES 1
#endif /* _WIN32 && ! __CYGWIN__ && ! _CRT_DECLARE_NONSTDC_NAMES */
#include <stdarg.h>
#include <stdint.h>
#include <sys/types.h>
#if ! defined(_WIN32) || defined(__CYGWIN__)
#include <unistd.h>
#include <sys/time.h>
#include <sys/socket.h>
#else  /* _WIN32 && ! __CYGWIN__ */
#include <ws2tcpip.h>
#if defined(_MSC_FULL_VER) && ! defined(_SSIZE_T_DEFINED)
#define _SSIZE_T_DEFINED
typedef intptr_t ssize_t;
#endif /* !_SSIZE_T_DEFINED */
#endif /* _WIN32 && ! __CYGWIN__ */
#endif

#if defined(__CYGWIN__) && ! defined(_SYS_TYPES_FD_SET)
/* Do not define __USE_W32_SOCKETS under Cygwin! */
#error Cygwin with winsock fd_set is not supported
#endif

#ifdef __has_attribute
#if __has_attribute (flag_enum)
#define _MHD_FLAGS_ENUM __attribute__((flag_enum))
#endif /* flag_enum */
#if __has_attribute (enum_extensibility)
#define _MHD_FIXED_ENUM __attribute__((enum_extensibility (closed)))
#endif /* enum_extensibility */
#endif /* __has_attribute */

#ifndef _MHD_FLAGS_ENUM
#define _MHD_FLAGS_ENUM
#endif /* _MHD_FLAGS_ENUM */
#ifndef _MHD_FIXED_ENUM
#define _MHD_FIXED_ENUM
#endif /* _MHD_FIXED_ENUM */

#define _MHD_FIXED_FLAGS_ENUM _MHD_FIXED_ENUM _MHD_FLAGS_ENUM

enum MHD_Result
{
  MHD_NO = 0,

  MHD_YES = 1

} _MHD_FIXED_ENUM;

#ifdef UINT64_MAX
#define MHD_SIZE_UNKNOWN UINT64_MAX
#else
#define MHD_SIZE_UNKNOWN  ((uint64_t) -1LL)
#endif

#define MHD_CONTENT_READER_END_OF_STREAM ((ssize_t) -1)
#define MHD_CONTENT_READER_END_WITH_ERROR ((ssize_t) -2)

#ifndef _MHD_EXTERN
#if defined(_WIN32) && defined(MHD_W32LIB)
#define _MHD_EXTERN extern
#elif defined(_WIN32) && defined(MHD_W32DLL)
/* Define MHD_W32DLL when using MHD as W32 .DLL to speed up linker a little */
#define _MHD_EXTERN __declspec(dllimport)
#else
#define _MHD_EXTERN extern
#endif
#endif

#ifndef MHD_SOCKET_DEFINED

#if ! defined(_WIN32) || defined(_SYS_TYPES_FD_SET)
#define MHD_POSIX_SOCKETS 1
typedef int MHD_socket;
#define MHD_INVALID_SOCKET (-1)
#else /* !defined(_WIN32) || defined(_SYS_TYPES_FD_SET) */
#define MHD_WINSOCK_SOCKETS 1
#include <winsock2.h>
typedef SOCKET MHD_socket;
#define MHD_INVALID_SOCKET (INVALID_SOCKET)
#endif /* !defined(_WIN32) || defined(_SYS_TYPES_FD_SET) */
#define MHD_SOCKET_DEFINED 1
#endif /* MHD_SOCKET_DEFINED */

#ifdef MHD_NO_DEPRECATION
#define _MHD_DEPR_MACRO(msg)
#define _MHD_NO_DEPR_IN_MACRO 1
#define _MHD_DEPR_IN_MACRO(msg)
#define _MHD_NO_DEPR_FUNC 1
#define _MHD_DEPR_FUNC(msg)
#endif /* MHD_NO_DEPRECATION */

#ifndef _MHD_DEPR_MACRO
#if defined(_MSC_FULL_VER) && _MSC_VER + 0 >= 1500
/* VS 2008 or later */
/* Stringify macros */
#define _MHD_INSTRMACRO(a) #a
#define _MHD_STRMACRO(a) _MHD_INSTRMACRO (a)
/* deprecation message */
#define _MHD_DEPR_MACRO(msg) \
  __pragma(message (__FILE__ "(" _MHD_STRMACRO ( __LINE__) "): warning: " msg))
#define _MHD_DEPR_IN_MACRO(msg) _MHD_DEPR_MACRO (msg)
#elif defined(__clang__) || defined(__GNUC_PATCHLEVEL__)
/* clang or GCC since 3.0 */
#define _MHD_GCC_PRAG(x) _Pragma(#x)
#if (defined(__clang__) && \
  (__clang_major__ + 0 >= 5 || \
   (! defined(__apple_build_version__) && \
  (__clang_major__ + 0  > 3 || \
   (__clang_major__ + 0 == 3 && __clang_minor__ >=  3))))) || \
  __GNUC__ + 0 > 4 || (__GNUC__ + 0 == 4 && __GNUC_MINOR__ + 0 >= 8)
/* clang >= 3.3 (or XCode's clang >= 5.0) or
   GCC >= 4.8 */
#define _MHD_DEPR_MACRO(msg) _MHD_GCC_PRAG (GCC warning msg)
#define _MHD_DEPR_IN_MACRO(msg) _MHD_DEPR_MACRO (msg)
#else /* older clang or GCC */
/* clang < 3.3, XCode's clang < 5.0, 3.0 <= GCC < 4.8 */
#define _MHD_DEPR_MACRO(msg) _MHD_GCC_PRAG (message msg)
#if (defined(__clang__) && \
  (__clang_major__ + 0  > 2 || \
   (__clang_major__ + 0 == 2 && __clang_minor__ >= 9)))  /* clang >= 2.9 */
/* clang handles inline pragmas better than GCC */
#define _MHD_DEPR_IN_MACRO(msg) _MHD_DEPR_MACRO (msg)
#endif /* clang >= 2.9 */
#endif  /* older clang or GCC */
/* #elif defined(SOMEMACRO) */ /* add compiler-specific macros here if required */
#endif /* clang || GCC >= 3.0 */
#endif /* !_MHD_DEPR_MACRO */

#ifndef _MHD_DEPR_MACRO
#define _MHD_DEPR_MACRO(msg)
#endif /* !_MHD_DEPR_MACRO */

#ifndef _MHD_DEPR_IN_MACRO
#define _MHD_NO_DEPR_IN_MACRO 1
#define _MHD_DEPR_IN_MACRO(msg)
#endif /* !_MHD_DEPR_IN_MACRO */

#ifndef _MHD_DEPR_FUNC
#if defined(_MSC_FULL_VER) && _MSC_VER + 0 >= 1400
/* VS 2005 or later */
#define _MHD_DEPR_FUNC(msg) __declspec(deprecated (msg))
#elif defined(_MSC_FULL_VER) && _MSC_VER + 0 >= 1310
/* VS .NET 2003 deprecation does not support custom messages */
#define _MHD_DEPR_FUNC(msg) __declspec(deprecated)
#elif (__GNUC__ + 0 >= 5) || (defined(__clang__) && \
  (__clang_major__ + 0 > 2 || \
   (__clang_major__ + 0 == 2 && __clang_minor__ >=  9)))
/* GCC >= 5.0 or clang >= 2.9 */
#define _MHD_DEPR_FUNC(msg) __attribute__((deprecated (msg)))
#elif defined(__clang__) || __GNUC__ + 0 > 3 || \
  (__GNUC__ + 0 == 3 && __GNUC_MINOR__ + 0 >= 1)
/* 3.1 <= GCC < 5.0 or clang < 2.9 */
/* old GCC-style deprecation does not support custom messages */
#define _MHD_DEPR_FUNC(msg) __attribute__((__deprecated__))
/* #elif defined(SOMEMACRO) */ /* add compiler-specific macros here if required */
#endif /* clang < 2.9 || GCC >= 3.1 */
#endif /* !_MHD_DEPR_FUNC */

#ifndef _MHD_DEPR_FUNC
#define _MHD_NO_DEPR_FUNC 1
#define _MHD_DEPR_FUNC(msg)
#endif /* !_MHD_DEPR_FUNC */

#ifndef MHD_LONG_LONG

#define MHD_LONG_LONG long long
#define MHD_UNSIGNED_LONG_LONG unsigned long long
#else /* MHD_LONG_LONG */
_MHD_DEPR_MACRO ( \
  "Macro MHD_LONG_LONG is deprecated, use MHD_UNSIGNED_LONG_LONG")
#endif

#ifndef MHD_LONG_LONG_PRINTF

#define MHD_LONG_LONG_PRINTF "ll"
#define MHD_UNSIGNED_LONG_LONG_PRINTF "%llu"
#else /* MHD_LONG_LONG_PRINTF */
_MHD_DEPR_MACRO ( \
  "Macro MHD_LONG_LONG_PRINTF is deprecated, use MHD_UNSIGNED_LONG_LONG_PRINTF")
#endif


/* 100 "Continue".            RFC9110, Section 15.2.1. */
#define MHD_HTTP_CONTINUE                    100
/* 101 "Switching Protocols". RFC9110, Section 15.2.2. */
#define MHD_HTTP_SWITCHING_PROTOCOLS         101
/* 102 "Processing".          RFC2518. */
#define MHD_HTTP_PROCESSING                  102
/* 103 "Early Hints".         RFC8297. */
#define MHD_HTTP_EARLY_HINTS                 103

/* 200 "OK".                  RFC9110, Section 15.3.1. */
#define MHD_HTTP_OK                          200
/* 201 "Created".             RFC9110, Section 15.3.2. */
#define MHD_HTTP_CREATED                     201
/* 202 "Accepted".            RFC9110, Section 15.3.3. */
#define MHD_HTTP_ACCEPTED                    202
/* 203 "Non-Authoritative Information". RFC9110, Section 15.3.4. */
#define MHD_HTTP_NON_AUTHORITATIVE_INFORMATION 203
/* 204 "No Content".          RFC9110, Section 15.3.5. */
#define MHD_HTTP_NO_CONTENT                  204
/* 205 "Reset Content".       RFC9110, Section 15.3.6. */
#define MHD_HTTP_RESET_CONTENT               205
/* 206 "Partial Content".     RFC9110, Section 15.3.7. */
#define MHD_HTTP_PARTIAL_CONTENT             206
/* 207 "Multi-Status".        RFC4918. */
#define MHD_HTTP_MULTI_STATUS                207
/* 208 "Already Reported".    RFC5842. */
#define MHD_HTTP_ALREADY_REPORTED            208

/* 226 "IM Used".             RFC3229. */
#define MHD_HTTP_IM_USED                     226

/* 300 "Multiple Choices".    RFC9110, Section 15.4.1. */
#define MHD_HTTP_MULTIPLE_CHOICES            300
/* 301 "Moved Permanently".   RFC9110, Section 15.4.2. */
#define MHD_HTTP_MOVED_PERMANENTLY           301
/* 302 "Found".               RFC9110, Section 15.4.3. */
#define MHD_HTTP_FOUND                       302
/* 303 "See Other".           RFC9110, Section 15.4.4. */
#define MHD_HTTP_SEE_OTHER                   303
/* 304 "Not Modified".        RFC9110, Section 15.4.5. */
#define MHD_HTTP_NOT_MODIFIED                304
/* 305 "Use Proxy".           RFC9110, Section 15.4.6. */
#define MHD_HTTP_USE_PROXY                   305
/* 306 "Switch Proxy".        Not used! RFC9110, Section 15.4.7. */
#define MHD_HTTP_SWITCH_PROXY                306
/* 307 "Temporary Redirect".  RFC9110, Section 15.4.8. */
#define MHD_HTTP_TEMPORARY_REDIRECT          307
/* 308 "Permanent Redirect".  RFC9110, Section 15.4.9. */
#define MHD_HTTP_PERMANENT_REDIRECT          308

/* 400 "Bad Request".         RFC9110, Section 15.5.1. */
#define MHD_HTTP_BAD_REQUEST                 400
/* 401 "Unauthorized".        RFC9110, Section 15.5.2. */
#define MHD_HTTP_UNAUTHORIZED                401
/* 402 "Payment Required".    RFC9110, Section 15.5.3. */
#define MHD_HTTP_PAYMENT_REQUIRED            402
/* 403 "Forbidden".           RFC9110, Section 15.5.4. */
#define MHD_HTTP_FORBIDDEN                   403
/* 404 "Not Found".           RFC9110, Section 15.5.5. */
#define MHD_HTTP_NOT_FOUND                   404
/* 405 "Method Not Allowed".  RFC9110, Section 15.5.6. */
#define MHD_HTTP_METHOD_NOT_ALLOWED          405
/* 406 "Not Acceptable".      RFC9110, Section 15.5.7. */
#define MHD_HTTP_NOT_ACCEPTABLE              406
/* 407 "Proxy Authentication Required". RFC9110, Section 15.5.8. */
#define MHD_HTTP_PROXY_AUTHENTICATION_REQUIRED 407
/* 408 "Request Timeout".     RFC9110, Section 15.5.9. */
#define MHD_HTTP_REQUEST_TIMEOUT             408
/* 409 "Conflict".            RFC9110, Section 15.5.10. */
#define MHD_HTTP_CONFLICT                    409
/* 410 "Gone".                RFC9110, Section 15.5.11. */
#define MHD_HTTP_GONE                        410
/* 411 "Length Required".     RFC9110, Section 15.5.12. */
#define MHD_HTTP_LENGTH_REQUIRED             411
/* 412 "Precondition Failed". RFC9110, Section 15.5.13. */
#define MHD_HTTP_PRECONDITION_FAILED         412
/* 413 "Content Too Large".   RFC9110, Section 15.5.14. */
#define MHD_HTTP_CONTENT_TOO_LARGE           413
/* 414 "URI Too Long".        RFC9110, Section 15.5.15. */
#define MHD_HTTP_URI_TOO_LONG                414
/* 415 "Unsupported Media Type". RFC9110, Section 15.5.16. */
#define MHD_HTTP_UNSUPPORTED_MEDIA_TYPE      415
/* 416 "Range Not Satisfiable". RFC9110, Section 15.5.17. */
#define MHD_HTTP_RANGE_NOT_SATISFIABLE       416
/* 417 "Expectation Failed".  RFC9110, Section 15.5.18. */
#define MHD_HTTP_EXPECTATION_FAILED          417


/* 421 "Misdirected Request". RFC9110, Section 15.5.20. */
#define MHD_HTTP_MISDIRECTED_REQUEST         421
/* 422 "Unprocessable Content". RFC9110, Section 15.5.21. */
#define MHD_HTTP_UNPROCESSABLE_CONTENT       422
/* 423 "Locked".              RFC4918. */
#define MHD_HTTP_LOCKED                      423
/* 424 "Failed Dependency".   RFC4918. */
#define MHD_HTTP_FAILED_DEPENDENCY           424
/* 425 "Too Early".           RFC8470. */
#define MHD_HTTP_TOO_EARLY                   425
/* 426 "Upgrade Required".    RFC9110, Section 15.5.22. */
#define MHD_HTTP_UPGRADE_REQUIRED            426

/* 428 "Precondition Required". RFC6585. */
#define MHD_HTTP_PRECONDITION_REQUIRED       428
/* 429 "Too Many Requests".   RFC6585. */
#define MHD_HTTP_TOO_MANY_REQUESTS           429

/* 431 "Request Header Fields Too Large". RFC6585. */
#define MHD_HTTP_REQUEST_HEADER_FIELDS_TOO_LARGE 431

/* 451 "Unavailable For Legal Reasons". RFC7725. */
#define MHD_HTTP_UNAVAILABLE_FOR_LEGAL_REASONS 451

/* 500 "Internal Server Error". RFC9110, Section 15.6.1. */
#define MHD_HTTP_INTERNAL_SERVER_ERROR       500
/* 501 "Not Implemented".     RFC9110, Section 15.6.2. */
#define MHD_HTTP_NOT_IMPLEMENTED             501
/* 502 "Bad Gateway".         RFC9110, Section 15.6.3. */
#define MHD_HTTP_BAD_GATEWAY                 502
/* 503 "Service Unavailable". RFC9110, Section 15.6.4. */
#define MHD_HTTP_SERVICE_UNAVAILABLE         503
/* 504 "Gateway Timeout".     RFC9110, Section 15.6.5. */
#define MHD_HTTP_GATEWAY_TIMEOUT             504
/* 505 "HTTP Version Not Supported". RFC9110, Section 15.6.6. */
#define MHD_HTTP_HTTP_VERSION_NOT_SUPPORTED  505
/* 506 "Variant Also Negotiates". RFC2295. */
#define MHD_HTTP_VARIANT_ALSO_NEGOTIATES     506
/* 507 "Insufficient Storage". RFC4918. */
#define MHD_HTTP_INSUFFICIENT_STORAGE        507
/* 508 "Loop Detected".       RFC5842. */
#define MHD_HTTP_LOOP_DETECTED               508

/* 510 "Not Extended".        (OBSOLETED) RFC2774; status-change-http-experiments-to-historic. */
#define MHD_HTTP_NOT_EXTENDED                510
/* 511 "Network Authentication Required". RFC6585. */
#define MHD_HTTP_NETWORK_AUTHENTICATION_REQUIRED 511


/* Not registered non-standard codes */
/* 449 "Reply With".          MS IIS extension. */
#define MHD_HTTP_RETRY_WITH                  449

/* 450 "Blocked by Windows Parental Controls". MS extension. */
#define MHD_HTTP_BLOCKED_BY_WINDOWS_PARENTAL_CONTROLS 450

/* 509 "Bandwidth Limit Exceeded". Apache extension. */
#define MHD_HTTP_BANDWIDTH_LIMIT_EXCEEDED    509

/* Deprecated names and codes */
#define MHD_HTTP_METHOD_NOT_ACCEPTABLE _MHD_DEPR_IN_MACRO (\
 "Value MHD_HTTP_METHOD_NOT_ACCEPTABLE is deprecated, use MHD_HTTP_NOT_ACCEPTABLE" \
 ) 406

#define MHD_HTTP_REQUEST_ENTITY_TOO_LARGE _MHD_DEPR_IN_MACRO (\
 "Value MHD_HTTP_REQUEST_ENTITY_TOO_LARGE is deprecated, use MHD_HTTP_CONTENT_TOO_LARGE"\
 ) 413

#define MHD_HTTP_PAYLOAD_TOO_LARGE _MHD_DEPR_IN_MACRO (\
  "Value MHD_HTTP_PAYLOAD_TOO_LARGE is deprecated use MHD_HTTP_CONTENT_TOO_LARGE" \
  ) 413

#define MHD_HTTP_REQUEST_URI_TOO_LONG _MHD_DEPR_IN_MACRO (\
  "Value MHD_HTTP_REQUEST_URI_TOO_LONG is deprecated, use MHD_HTTP_URI_TOO_LONG" \
  ) 414

#define MHD_HTTP_REQUESTED_RANGE_NOT_SATISFIABLE _MHD_DEPR_IN_MACRO (\
 "Value MHD_HTTP_REQUESTED_RANGE_NOT_SATISFIABLE is deprecated, use MHD_HTTP_RANGE_NOT_SATISFIABLE" \
 ) 416

#define MHD_HTTP_UNPROCESSABLE_ENTITY _MHD_DEPR_IN_MACRO (\
 "Value MHD_HTTP_UNPROCESSABLE_ENTITY is deprecated, use MHD_HTTP_UNPROCESSABLE_CONTENT" \
 ) 422

#define MHD_HTTP_UNORDERED_COLLECTION _MHD_DEPR_IN_MACRO (\
  "Value MHD_HTTP_UNORDERED_COLLECTION is deprecated as it was removed from RFC" \
  ) 425

#define MHD_HTTP_NO_RESPONSE _MHD_DEPR_IN_MACRO (\
 "Value MHD_HTTP_NO_RESPONSE is deprecated as it is nginx internal code for logs only"\
 ) 444

 /* end of group httpcode */

_MHD_EXTERN const char *
MHD_get_reason_phrase_for (unsigned int code);


_MHD_EXTERN size_t
MHD_get_reason_phrase_len_for (unsigned int code);

#define MHD_ICY_FLAG ((uint32_t) (((uint32_t) 1) << 31))

/* Main HTTP headers. */
/* Permanent.     RFC9110, Section 12.5.1: HTTP Semantics */
#define MHD_HTTP_HEADER_ACCEPT       "Accept"
/* Deprecated.    RFC9110, Section 12.5.2: HTTP Semantics */
#define MHD_HTTP_HEADER_ACCEPT_CHARSET "Accept-Charset"
/* Permanent.     RFC9110, Section 12.5.3: HTTP Semantics */
#define MHD_HTTP_HEADER_ACCEPT_ENCODING "Accept-Encoding"
/* Permanent.     RFC9110, Section 12.5.4: HTTP Semantics */
#define MHD_HTTP_HEADER_ACCEPT_LANGUAGE "Accept-Language"
/* Permanent.     RFC9110, Section 14.3: HTTP Semantics */
#define MHD_HTTP_HEADER_ACCEPT_RANGES "Accept-Ranges"
/* Permanent.     RFC9111, Section 5.1: HTTP Caching */
#define MHD_HTTP_HEADER_AGE          "Age"
/* Permanent.     RFC9110, Section 10.2.1: HTTP Semantics */
#define MHD_HTTP_HEADER_ALLOW        "Allow"
/* Permanent.     RFC9110, Section 11.6.3: HTTP Semantics */
#define MHD_HTTP_HEADER_AUTHENTICATION_INFO "Authentication-Info"
/* Permanent.     RFC9110, Section 11.6.2: HTTP Semantics */
#define MHD_HTTP_HEADER_AUTHORIZATION "Authorization"
/* Permanent.     RFC9111, Section 5.2 */
#define MHD_HTTP_HEADER_CACHE_CONTROL "Cache-Control"
/* Permanent.     RFC9112, Section 9.6: HTTP/1.1 */
#define MHD_HTTP_HEADER_CLOSE        "Close"
/* Permanent.     RFC9110, Section 7.6.1: HTTP Semantics */
#define MHD_HTTP_HEADER_CONNECTION   "Connection"
/* Permanent.     RFC9110, Section 8.4: HTTP Semantics */
#define MHD_HTTP_HEADER_CONTENT_ENCODING "Content-Encoding"
/* Permanent.     RFC9110, Section 8.5: HTTP Semantics */
#define MHD_HTTP_HEADER_CONTENT_LANGUAGE "Content-Language"
/* Permanent.     RFC9110, Section 8.6: HTTP Semantics */
#define MHD_HTTP_HEADER_CONTENT_LENGTH "Content-Length"
/* Permanent.     RFC9110, Section 8.7: HTTP Semantics */
#define MHD_HTTP_HEADER_CONTENT_LOCATION "Content-Location"
/* Permanent.     RFC9110, Section 14.4: HTTP Semantics */
#define MHD_HTTP_HEADER_CONTENT_RANGE "Content-Range"
/* Permanent.     RFC9110, Section 8.3: HTTP Semantics */
#define MHD_HTTP_HEADER_CONTENT_TYPE "Content-Type"
/* Permanent.     RFC9110, Section 6.6.1: HTTP Semantics */
#define MHD_HTTP_HEADER_DATE         "Date"
/* Permanent.     RFC9110, Section 8.8.3: HTTP Semantics */
#define MHD_HTTP_HEADER_ETAG         "ETag"
/* Permanent.     RFC9110, Section 10.1.1: HTTP Semantics */
#define MHD_HTTP_HEADER_EXPECT       "Expect"
/* Permanent.     RFC9111, Section 5.3: HTTP Caching */
#define MHD_HTTP_HEADER_EXPIRES      "Expires"
/* Permanent.     RFC9110, Section 10.1.2: HTTP Semantics */
#define MHD_HTTP_HEADER_FROM         "From"
/* Permanent.     RFC9110, Section 7.2: HTTP Semantics */
#define MHD_HTTP_HEADER_HOST         "Host"
/* Permanent.     RFC9110, Section 13.1.1: HTTP Semantics */
#define MHD_HTTP_HEADER_IF_MATCH     "If-Match"
/* Permanent.     RFC9110, Section 13.1.3: HTTP Semantics */
#define MHD_HTTP_HEADER_IF_MODIFIED_SINCE "If-Modified-Since"
/* Permanent.     RFC9110, Section 13.1.2: HTTP Semantics */
#define MHD_HTTP_HEADER_IF_NONE_MATCH "If-None-Match"
/* Permanent.     RFC9110, Section 13.1.5: HTTP Semantics */
#define MHD_HTTP_HEADER_IF_RANGE     "If-Range"
/* Permanent.     RFC9110, Section 13.1.4: HTTP Semantics */
#define MHD_HTTP_HEADER_IF_UNMODIFIED_SINCE "If-Unmodified-Since"
/* Permanent.     RFC9110, Section 8.8.2: HTTP Semantics */
#define MHD_HTTP_HEADER_LAST_MODIFIED "Last-Modified"
/* Permanent.     RFC9110, Section 10.2.2: HTTP Semantics */
#define MHD_HTTP_HEADER_LOCATION     "Location"
/* Permanent.     RFC9110, Section 7.6.2: HTTP Semantics */
#define MHD_HTTP_HEADER_MAX_FORWARDS "Max-Forwards"
/* Permanent.     RFC9112, Appendix B.1: HTTP/1.1 */
#define MHD_HTTP_HEADER_MIME_VERSION "MIME-Version"
/* Deprecated.    RFC9111, Section 5.4: HTTP Caching */
#define MHD_HTTP_HEADER_PRAGMA       "Pragma"
/* Permanent.     RFC9110, Section 11.7.1: HTTP Semantics */
#define MHD_HTTP_HEADER_PROXY_AUTHENTICATE "Proxy-Authenticate"
/* Permanent.     RFC9110, Section 11.7.3: HTTP Semantics */
#define MHD_HTTP_HEADER_PROXY_AUTHENTICATION_INFO "Proxy-Authentication-Info"
/* Permanent.     RFC9110, Section 11.7.2: HTTP Semantics */
#define MHD_HTTP_HEADER_PROXY_AUTHORIZATION "Proxy-Authorization"
/* Permanent.     RFC9110, Section 14.2: HTTP Semantics */
#define MHD_HTTP_HEADER_RANGE        "Range"
/* Permanent.     RFC9110, Section 10.1.3: HTTP Semantics */
#define MHD_HTTP_HEADER_REFERER      "Referer"
/* Permanent.     RFC9110, Section 10.2.3: HTTP Semantics */
#define MHD_HTTP_HEADER_RETRY_AFTER  "Retry-After"
/* Permanent.     RFC9110, Section 10.2.4: HTTP Semantics */
#define MHD_HTTP_HEADER_SERVER       "Server"
/* Permanent.     RFC9110, Section 10.1.4: HTTP Semantics */
#define MHD_HTTP_HEADER_TE           "TE"
/* Permanent.     RFC9110, Section 6.6.2: HTTP Semantics */
#define MHD_HTTP_HEADER_TRAILER      "Trailer"
/* Permanent.     RFC9112, Section 6.1: HTTP Semantics */
#define MHD_HTTP_HEADER_TRANSFER_ENCODING "Transfer-Encoding"
/* Permanent.     RFC9110, Section 7.8: HTTP Semantics */
#define MHD_HTTP_HEADER_UPGRADE      "Upgrade"
/* Permanent.     RFC9110, Section 10.1.5: HTTP Semantics */
#define MHD_HTTP_HEADER_USER_AGENT   "User-Agent"
/* Permanent.     RFC9110, Section 12.5.5: HTTP Semantics */
#define MHD_HTTP_HEADER_VARY         "Vary"
/* Permanent.     RFC9110, Section 7.6.3: HTTP Semantics */
#define MHD_HTTP_HEADER_VIA          "Via"
/* Permanent.     RFC9110, Section 11.6.1: HTTP Semantics */
#define MHD_HTTP_HEADER_WWW_AUTHENTICATE "WWW-Authenticate"
/* Permanent.     RFC9110, Section 12.5.5: HTTP Semantics */
#define MHD_HTTP_HEADER_ASTERISK     "*"

/* Additional HTTP headers. */
/* Permanent.     RFC 3229: Delta encoding in HTTP */
#define MHD_HTTP_HEADER_A_IM         "A-IM"
/* Permanent.     RFC 2324: Hyper Text Coffee Pot Control Protocol (HTCPCP/1.0) */
#define MHD_HTTP_HEADER_ACCEPT_ADDITIONS "Accept-Additions"
/* Permanent.     RFC 8942, Section 3.1: HTTP Client Hints */
#define MHD_HTTP_HEADER_ACCEPT_CH    "Accept-CH"
/* Permanent.     RFC 7089: HTTP Framework for Time-Based Access to Resource States -- Memento */
#define MHD_HTTP_HEADER_ACCEPT_DATETIME "Accept-Datetime"
/* Permanent.     RFC 2295: Transparent Content Negotiation in HTTP */
#define MHD_HTTP_HEADER_ACCEPT_FEATURES "Accept-Features"
/* Permanent.     RFC 5789: PATCH Method for HTTP */
#define MHD_HTTP_HEADER_ACCEPT_PATCH "Accept-Patch"
/* Permanent.     Linked Data Platform 1.0 */
#define MHD_HTTP_HEADER_ACCEPT_POST  "Accept-Post"
/* Permanent.     RFC-ietf-httpbis-message-signatures-19, Section 5.1: HTTP Message Signatures */
#define MHD_HTTP_HEADER_ACCEPT_SIGNATURE "Accept-Signature"
/* Permanent.     Fetch */
#define MHD_HTTP_HEADER_ACCESS_CONTROL_ALLOW_CREDENTIALS \
  "Access-Control-Allow-Credentials"
/* Permanent.     Fetch */
#define MHD_HTTP_HEADER_ACCESS_CONTROL_ALLOW_HEADERS \
  "Access-Control-Allow-Headers"
/* Permanent.     Fetch */
#define MHD_HTTP_HEADER_ACCESS_CONTROL_ALLOW_METHODS \
  "Access-Control-Allow-Methods"
/* Permanent.     Fetch */
#define MHD_HTTP_HEADER_ACCESS_CONTROL_ALLOW_ORIGIN \
  "Access-Control-Allow-Origin"
/* Permanent.     Fetch */
#define MHD_HTTP_HEADER_ACCESS_CONTROL_EXPOSE_HEADERS \
  "Access-Control-Expose-Headers"
/* Permanent.     Fetch */
#define MHD_HTTP_HEADER_ACCESS_CONTROL_MAX_AGE "Access-Control-Max-Age"
/* Permanent.     Fetch */
#define MHD_HTTP_HEADER_ACCESS_CONTROL_REQUEST_HEADERS \
  "Access-Control-Request-Headers"
/* Permanent.     Fetch */
#define MHD_HTTP_HEADER_ACCESS_CONTROL_REQUEST_METHOD \
  "Access-Control-Request-Method"
/* Permanent.     RFC 7639, Section 2: The ALPN HTTP Header Field */
#define MHD_HTTP_HEADER_ALPN         "ALPN"
/* Permanent.     RFC 7838: HTTP Alternative Services */
#define MHD_HTTP_HEADER_ALT_SVC      "Alt-Svc"
/* Permanent.     RFC 7838: HTTP Alternative Services */
#define MHD_HTTP_HEADER_ALT_USED     "Alt-Used"
/* Permanent.     RFC 2295: Transparent Content Negotiation in HTTP */
#define MHD_HTTP_HEADER_ALTERNATES   "Alternates"
/* Permanent.     RFC 4437: Web Distributed Authoring and Versioning (WebDAV) Redirect Reference Resources */
#define MHD_HTTP_HEADER_APPLY_TO_REDIRECT_REF "Apply-To-Redirect-Ref"
/* Permanent.     RFC 8053, Section 4: HTTP Authentication Extensions for Interactive Clients */
#define MHD_HTTP_HEADER_AUTHENTICATION_CONTROL "Authentication-Control"
/* Permanent.     RFC9211: The Cache-Status HTTP Response Header Field */
#define MHD_HTTP_HEADER_CACHE_STATUS "Cache-Status"
/* Permanent.     RFC 8607, Section 5.1: Calendaring Extensions to WebDAV (CalDAV): Managed Attachments */
#define MHD_HTTP_HEADER_CAL_MANAGED_ID "Cal-Managed-ID"
/* Permanent.     RFC 7809, Section 7.1: Calendaring Extensions to WebDAV (CalDAV): Time Zones by Reference */
#define MHD_HTTP_HEADER_CALDAV_TIMEZONES "CalDAV-Timezones"
/* Permanent.     RFC9297 */
#define MHD_HTTP_HEADER_CAPSULE_PROTOCOL "Capsule-Protocol"
/* Permanent.     RFC9213: Targeted HTTP Cache Control */
#define MHD_HTTP_HEADER_CDN_CACHE_CONTROL "CDN-Cache-Control"
/* Permanent.     RFC 8586: Loop Detection in Content Delivery Networks (CDNs) */
#define MHD_HTTP_HEADER_CDN_LOOP     "CDN-Loop"
/* Permanent.     RFC 8739, Section 3.3: Support for Short-Term, Automatically Renewed (STAR) Certificates in the Automated Certificate Management Environment (ACME) */
#define MHD_HTTP_HEADER_CERT_NOT_AFTER "Cert-Not-After"
/* Permanent.     RFC 8739, Section 3.3: Support for Short-Term, Automatically Renewed (STAR) Certificates in the Automated Certificate Management Environment (ACME) */
#define MHD_HTTP_HEADER_CERT_NOT_BEFORE "Cert-Not-Before"
/* Permanent.     Clear Site Data */
#define MHD_HTTP_HEADER_CLEAR_SITE_DATA "Clear-Site-Data"
/* Permanent.     RFC9440, Section 2: Client-Cert HTTP Header Field */
#define MHD_HTTP_HEADER_CLIENT_CERT  "Client-Cert"
/* Permanent.     RFC9440, Section 2: Client-Cert HTTP Header Field */
#define MHD_HTTP_HEADER_CLIENT_CERT_CHAIN "Client-Cert-Chain"
/* Permanent.     RFC-ietf-httpbis-digest-headers-13, Section 2: Digest Fields */
#define MHD_HTTP_HEADER_CONTENT_DIGEST "Content-Digest"
/* Permanent.     RFC 6266: Use of the Content-Disposition Header Field in the Hypertext Transfer Protocol (HTTP) */
#define MHD_HTTP_HEADER_CONTENT_DISPOSITION "Content-Disposition"
/* Permanent.     The HTTP Distribution and Replication Protocol */
#define MHD_HTTP_HEADER_CONTENT_ID   "Content-ID"
/* Permanent.     Content Security Policy Level 3 */
#define MHD_HTTP_HEADER_CONTENT_SECURITY_POLICY "Content-Security-Policy"
/* Permanent.     Content Security Policy Level 3 */
#define MHD_HTTP_HEADER_CONTENT_SECURITY_POLICY_REPORT_ONLY \
  "Content-Security-Policy-Report-Only"
/* Permanent.     RFC 6265: HTTP State Management Mechanism */
#define MHD_HTTP_HEADER_COOKIE       "Cookie"
/* Permanent.     HTML */
#define MHD_HTTP_HEADER_CROSS_ORIGIN_EMBEDDER_POLICY \
  "Cross-Origin-Embedder-Policy"
/* Permanent.     HTML */
#define MHD_HTTP_HEADER_CROSS_ORIGIN_EMBEDDER_POLICY_REPORT_ONLY \
  "Cross-Origin-Embedder-Policy-Report-Only"
/* Permanent.     HTML */
#define MHD_HTTP_HEADER_CROSS_ORIGIN_OPENER_POLICY "Cross-Origin-Opener-Policy"
/* Permanent.     HTML */
#define MHD_HTTP_HEADER_CROSS_ORIGIN_OPENER_POLICY_REPORT_ONLY \
  "Cross-Origin-Opener-Policy-Report-Only"
/* Permanent.     Fetch */
#define MHD_HTTP_HEADER_CROSS_ORIGIN_RESOURCE_POLICY \
  "Cross-Origin-Resource-Policy"
/* Permanent.     RFC 5323: Web Distributed Authoring and Versioning (WebDAV) SEARCH */
#define MHD_HTTP_HEADER_DASL         "DASL"
/* Permanent.     RFC 4918: HTTP Extensions for Web Distributed Authoring and Versioning (WebDAV) */
#define MHD_HTTP_HEADER_DAV          "DAV"
/* Permanent.     RFC 3229: Delta encoding in HTTP */
#define MHD_HTTP_HEADER_DELTA_BASE   "Delta-Base"
/* Permanent.     RFC 4918: HTTP Extensions for Web Distributed Authoring and Versioning (WebDAV) */
#define MHD_HTTP_HEADER_DEPTH        "Depth"
/* Permanent.     RFC 4918: HTTP Extensions for Web Distributed Authoring and Versioning (WebDAV) */
#define MHD_HTTP_HEADER_DESTINATION  "Destination"
/* Permanent.     The HTTP Distribution and Replication Protocol */
#define MHD_HTTP_HEADER_DIFFERENTIAL_ID "Differential-ID"
/* Permanent.     RFC9449: OAuth 2.0 Demonstrating Proof of Possession (DPoP) */
#define MHD_HTTP_HEADER_DPOP         "DPoP"
/* Permanent.     RFC9449: OAuth 2.0 Demonstrating Proof of Possession (DPoP) */
#define MHD_HTTP_HEADER_DPOP_NONCE   "DPoP-Nonce"
/* Permanent.     RFC 8470: Using Early Data in HTTP */
#define MHD_HTTP_HEADER_EARLY_DATA   "Early-Data"
/* Permanent.     RFC9163: Expect-CT Extension for HTTP */
#define MHD_HTTP_HEADER_EXPECT_CT    "Expect-CT"
/* Permanent.     RFC 7239: Forwarded HTTP Extension */
#define MHD_HTTP_HEADER_FORWARDED    "Forwarded"
/* Permanent.     RFC 7486, Section 6.1.1: HTTP Origin-Bound Authentication (HOBA) */
#define MHD_HTTP_HEADER_HOBAREG      "Hobareg"
/* Permanent.     RFC 4918: HTTP Extensions for Web Distributed Authoring and Versioning (WebDAV) */
#define MHD_HTTP_HEADER_IF           "If"
/* Permanent.      RFC 6338: Scheduling Extensions to CalDAV */
#define MHD_HTTP_HEADER_IF_SCHEDULE_TAG_MATCH "If-Schedule-Tag-Match"
/* Permanent.     RFC 3229: Delta encoding in HTTP */
#define MHD_HTTP_HEADER_IM           "IM"
/* Permanent.     RFC 8473: Token Binding over HTTP */
#define MHD_HTTP_HEADER_INCLUDE_REFERRED_TOKEN_BINDING_ID \
  "Include-Referred-Token-Binding-ID"
/* Permanent.     RFC 2068: Hypertext Transfer Protocol -- HTTP/1.1 */
#define MHD_HTTP_HEADER_KEEP_ALIVE   "Keep-Alive"
/* Permanent.     RFC 3253: Versioning Extensions to WebDAV: (Web Distributed Authoring and Versioning) */
#define MHD_HTTP_HEADER_LABEL        "Label"
/* Permanent.     HTML */
#define MHD_HTTP_HEADER_LAST_EVENT_ID "Last-Event-ID"
/* Permanent.     RFC 8288: Web Linking */
#define MHD_HTTP_HEADER_LINK         "Link"
/* Permanent.     RFC 4918: HTTP Extensions for Web Distributed Authoring and Versioning (WebDAV) */
#define MHD_HTTP_HEADER_LOCK_TOKEN   "Lock-Token"
/* Permanent.     RFC 7089: HTTP Framework for Time-Based Access to Resource States -- Memento */
#define MHD_HTTP_HEADER_MEMENTO_DATETIME "Memento-Datetime"
/* Permanent.     RFC 2227: Simple Hit-Metering and Usage-Limiting for HTTP */
#define MHD_HTTP_HEADER_METER        "Meter"
/* Permanent.     RFC 2295: Transparent Content Negotiation in HTTP */
#define MHD_HTTP_HEADER_NEGOTIATE    "Negotiate"
/* Permanent.     Network Error Logging */
#define MHD_HTTP_HEADER_NEL          "NEL"
/* Permanent.     OData Version 4.01 Part 1: Protocol; OASIS; Chet_Ensign */
#define MHD_HTTP_HEADER_ODATA_ENTITYID "OData-EntityId"
/* Permanent.     OData Version 4.01 Part 1: Protocol; OASIS; Chet_Ensign */
#define MHD_HTTP_HEADER_ODATA_ISOLATION "OData-Isolation"
/* Permanent.     OData Version 4.01 Part 1: Protocol; OASIS; Chet_Ensign */
#define MHD_HTTP_HEADER_ODATA_MAXVERSION "OData-MaxVersion"
/* Permanent.     OData Version 4.01 Part 1: Protocol; OASIS; Chet_Ensign */
#define MHD_HTTP_HEADER_ODATA_VERSION "OData-Version"
/* Permanent.     RFC 8053, Section 3: HTTP Authentication Extensions for Interactive Clients */
#define MHD_HTTP_HEADER_OPTIONAL_WWW_AUTHENTICATE "Optional-WWW-Authenticate"
/* Permanent.     RFC 3648: Web Distributed Authoring and Versioning (WebDAV) Ordered Collections Protocol */
#define MHD_HTTP_HEADER_ORDERING_TYPE "Ordering-Type"
/* Permanent.     RFC 6454: The Web Origin Concept */
#define MHD_HTTP_HEADER_ORIGIN       "Origin"
/* Permanent.     HTML */
#define MHD_HTTP_HEADER_ORIGIN_AGENT_CLUSTER "Origin-Agent-Cluster"
/* Permanent.     RFC 8613, Section 11.1: Object Security for Constrained RESTful Environments (OSCORE) */
#define MHD_HTTP_HEADER_OSCORE       "OSCORE"
/* Permanent.     OASIS Project Specification 01; OASIS; Chet_Ensign */
#define MHD_HTTP_HEADER_OSLC_CORE_VERSION "OSLC-Core-Version"
/* Permanent.     RFC 4918: HTTP Extensions for Web Distributed Authoring and Versioning (WebDAV) */
#define MHD_HTTP_HEADER_OVERWRITE    "Overwrite"
/* Permanent.     HTML */
#define MHD_HTTP_HEADER_PING_FROM    "Ping-From"
/* Permanent.     HTML */
#define MHD_HTTP_HEADER_PING_TO      "Ping-To"
/* Permanent.     RFC 3648: Web Distributed Authoring and Versioning (WebDAV) Ordered Collections Protocol */
#define MHD_HTTP_HEADER_POSITION     "Position"
/* Permanent.     RFC 7240: Prefer Header for HTTP */
#define MHD_HTTP_HEADER_PREFER       "Prefer"
/* Permanent.     RFC 7240: Prefer Header for HTTP */
#define MHD_HTTP_HEADER_PREFERENCE_APPLIED "Preference-Applied"
/* Permanent.     RFC9218: Extensible Prioritization Scheme for HTTP */
#define MHD_HTTP_HEADER_PRIORITY     "Priority"
/* Permanent.     RFC9209: The Proxy-Status HTTP Response Header Field */
#define MHD_HTTP_HEADER_PROXY_STATUS "Proxy-Status"
/* Permanent.     RFC 7469: Public Key Pinning Extension for HTTP */
#define MHD_HTTP_HEADER_PUBLIC_KEY_PINS "Public-Key-Pins"
/* Permanent.     RFC 7469: Public Key Pinning Extension for HTTP */
#define MHD_HTTP_HEADER_PUBLIC_KEY_PINS_REPORT_ONLY \
  "Public-Key-Pins-Report-Only"
/* Permanent.     RFC 4437: Web Distributed Authoring and Versioning (WebDAV) Redirect Reference Resources */
#define MHD_HTTP_HEADER_REDIRECT_REF "Redirect-Ref"
/* Permanent.     HTML */
#define MHD_HTTP_HEADER_REFRESH      "Refresh"
/* Permanent.     RFC 8555, Section 6.5.1: Automatic Certificate Management Environment (ACME) */
#define MHD_HTTP_HEADER_REPLAY_NONCE "Replay-Nonce"
/* Permanent.     RFC-ietf-httpbis-digest-headers-13, Section 3: Digest Fields */
#define MHD_HTTP_HEADER_REPR_DIGEST  "Repr-Digest"
/* Permanent.     RFC 6638: Scheduling Extensions to CalDAV */
#define MHD_HTTP_HEADER_SCHEDULE_REPLY "Schedule-Reply"
/* Permanent.     RFC 6338: Scheduling Extensions to CalDAV */
#define MHD_HTTP_HEADER_SCHEDULE_TAG "Schedule-Tag"
/* Permanent.     Fetch */
#define MHD_HTTP_HEADER_SEC_PURPOSE  "Sec-Purpose"
/* Permanent.     RFC 8473: Token Binding over HTTP */
#define MHD_HTTP_HEADER_SEC_TOKEN_BINDING "Sec-Token-Binding"
/* Permanent.     RFC 6455: The WebSocket Protocol */
#define MHD_HTTP_HEADER_SEC_WEBSOCKET_ACCEPT "Sec-WebSocket-Accept"
/* Permanent.     RFC 6455: The WebSocket Protocol */
#define MHD_HTTP_HEADER_SEC_WEBSOCKET_EXTENSIONS "Sec-WebSocket-Extensions"
/* Permanent.     RFC 6455: The WebSocket Protocol */
#define MHD_HTTP_HEADER_SEC_WEBSOCKET_KEY "Sec-WebSocket-Key"
/* Permanent.     RFC 6455: The WebSocket Protocol */
#define MHD_HTTP_HEADER_SEC_WEBSOCKET_PROTOCOL "Sec-WebSocket-Protocol"
/* Permanent.     RFC 6455: The WebSocket Protocol */
#define MHD_HTTP_HEADER_SEC_WEBSOCKET_VERSION "Sec-WebSocket-Version"
/* Permanent.     Server Timing */
#define MHD_HTTP_HEADER_SERVER_TIMING "Server-Timing"
/* Permanent.     RFC 6265: HTTP State Management Mechanism */
#define MHD_HTTP_HEADER_SET_COOKIE   "Set-Cookie"
/* Permanent.     RFC-ietf-httpbis-message-signatures-19, Section 4.2: HTTP Message Signatures */
#define MHD_HTTP_HEADER_SIGNATURE    "Signature"
/* Permanent.     RFC-ietf-httpbis-message-signatures-19, Section 4.1: HTTP Message Signatures */
#define MHD_HTTP_HEADER_SIGNATURE_INPUT "Signature-Input"
/* Permanent.     RFC 5023: The Atom Publishing Protocol */
#define MHD_HTTP_HEADER_SLUG         "SLUG"
/* Permanent.     Simple Object Access Protocol (SOAP) 1.1 */
#define MHD_HTTP_HEADER_SOAPACTION   "SoapAction"
/* Permanent.     RFC 2518: HTTP Extensions for Distributed Authoring -- WEBDAV */
#define MHD_HTTP_HEADER_STATUS_URI   "Status-URI"
/* Permanent.     RFC 6797: HTTP Strict Transport Security (HSTS) */
#define MHD_HTTP_HEADER_STRICT_TRANSPORT_SECURITY "Strict-Transport-Security"
/* Permanent.     RFC 8594: The Sunset HTTP Header Field */
#define MHD_HTTP_HEADER_SUNSET       "Sunset"
/* Permanent.     Edge Architecture Specification */
#define MHD_HTTP_HEADER_SURROGATE_CAPABILITY "Surrogate-Capability"
/* Permanent.     Edge Architecture Specification */
#define MHD_HTTP_HEADER_SURROGATE_CONTROL "Surrogate-Control"
/* Permanent.     RFC 2295: Transparent Content Negotiation in HTTP */
#define MHD_HTTP_HEADER_TCN          "TCN"
/* Permanent.     RFC 4918: HTTP Extensions for Web Distributed Authoring and Versioning (WebDAV) */
#define MHD_HTTP_HEADER_TIMEOUT      "Timeout"
/* Permanent.     RFC 8030, Section 5.4: Generic Event Delivery Using HTTP Push */
#define MHD_HTTP_HEADER_TOPIC        "Topic"
/* Permanent.     Trace Context */
#define MHD_HTTP_HEADER_TRACEPARENT  "Traceparent"
/* Permanent.     Trace Context */
#define MHD_HTTP_HEADER_TRACESTATE   "Tracestate"
/* Permanent.     RFC 8030, Section 5.2: Generic Event Delivery Using HTTP Push */
#define MHD_HTTP_HEADER_TTL          "TTL"
/* Permanent.     RFC 8030, Section 5.3: Generic Event Delivery Using HTTP Push */
#define MHD_HTTP_HEADER_URGENCY      "Urgency"
/* Permanent.     RFC 2295: Transparent Content Negotiation in HTTP */
#define MHD_HTTP_HEADER_VARIANT_VARY "Variant-Vary"
/* Permanent.     RFC-ietf-httpbis-digest-headers-13, Section 4: Digest Fields */
#define MHD_HTTP_HEADER_WANT_CONTENT_DIGEST "Want-Content-Digest"
/* Permanent.     RFC-ietf-httpbis-digest-headers-13, Section 4: Digest Fields */
#define MHD_HTTP_HEADER_WANT_REPR_DIGEST "Want-Repr-Digest"
/* Permanent.     Fetch */
#define MHD_HTTP_HEADER_X_CONTENT_TYPE_OPTIONS "X-Content-Type-Options"
/* Permanent.     HTML */
#define MHD_HTTP_HEADER_X_FRAME_OPTIONS "X-Frame-Options"
/* Provisional.   AMP-Cache-Transform HTTP request header */
#define MHD_HTTP_HEADER_AMP_CACHE_TRANSFORM "AMP-Cache-Transform"
/* Provisional.   OSLC Configuration Management Version 1.0. Part 3: Configuration Specification */
#define MHD_HTTP_HEADER_CONFIGURATION_CONTEXT "Configuration-Context"
/* Provisional.   RFC 6017: Electronic Data Interchange - Internet Integration (EDIINT) Features Header Field */
#define MHD_HTTP_HEADER_EDIINT_FEATURES "EDIINT-Features"
/* Provisional.   OData Version 4.01 Part 1: Protocol; OASIS; Chet_Ensign */
#define MHD_HTTP_HEADER_ISOLATION    "Isolation"
/* Provisional.   Permissions Policy */
#define MHD_HTTP_HEADER_PERMISSIONS_POLICY "Permissions-Policy"
/* Provisional.   Repeatable Requests Version 1.0; OASIS; Chet_Ensign */
#define MHD_HTTP_HEADER_REPEATABILITY_CLIENT_ID "Repeatability-Client-ID"
/* Provisional.   Repeatable Requests Version 1.0; OASIS; Chet_Ensign */
#define MHD_HTTP_HEADER_REPEATABILITY_FIRST_SENT "Repeatability-First-Sent"
/* Provisional.   Repeatable Requests Version 1.0; OASIS; Chet_Ensign */
#define MHD_HTTP_HEADER_REPEATABILITY_REQUEST_ID "Repeatability-Request-ID"
/* Provisional.   Repeatable Requests Version 1.0; OASIS; Chet_Ensign */
#define MHD_HTTP_HEADER_REPEATABILITY_RESULT "Repeatability-Result"
/* Provisional.   Reporting API */
#define MHD_HTTP_HEADER_REPORTING_ENDPOINTS "Reporting-Endpoints"
/* Provisional.   Global Privacy Control (GPC) */
#define MHD_HTTP_HEADER_SEC_GPC      "Sec-GPC"
/* Provisional.   Resource Timing Level 1 */
#define MHD_HTTP_HEADER_TIMING_ALLOW_ORIGIN "Timing-Allow-Origin"
/* Deprecated.    PEP - an Extension Mechanism for HTTP; status-change-http-experiments-to-historic */
#define MHD_HTTP_HEADER_C_PEP_INFO   "C-PEP-Info"
/* Deprecated.    White Paper: Joint Electronic Payment Initiative */
#define MHD_HTTP_HEADER_PROTOCOL_INFO "Protocol-Info"
/* Deprecated.    White Paper: Joint Electronic Payment Initiative */
#define MHD_HTTP_HEADER_PROTOCOL_QUERY "Protocol-Query"
/* Obsoleted.     Access Control for Cross-site Requests */
#define MHD_HTTP_HEADER_ACCESS_CONTROL "Access-Control"
/* Obsoleted.     RFC 2774: An HTTP Extension Framework; status-change-http-experiments-to-historic */
#define MHD_HTTP_HEADER_C_EXT        "C-Ext"
/* Obsoleted.     RFC 2774: An HTTP Extension Framework; status-change-http-experiments-to-historic */
#define MHD_HTTP_HEADER_C_MAN        "C-Man"
/* Obsoleted.     RFC 2774: An HTTP Extension Framework; status-change-http-experiments-to-historic */
#define MHD_HTTP_HEADER_C_OPT        "C-Opt"
/* Obsoleted.     PEP - an Extension Mechanism for HTTP; status-change-http-experiments-to-historic */
#define MHD_HTTP_HEADER_C_PEP        "C-PEP"
/* Obsoleted.     RFC 2068: Hypertext Transfer Protocol -- HTTP/1.1; RFC 2616: Hypertext Transfer Protocol -- HTTP/1.1 */
#define MHD_HTTP_HEADER_CONTENT_BASE "Content-Base"
/* Obsoleted.     RFC 2616, Section 14.15: Hypertext Transfer Protocol -- HTTP/1.1; RFC 7231, Appendix B: Hypertext Transfer Protocol (HTTP/1.1): Semantics and Content */
#define MHD_HTTP_HEADER_CONTENT_MD5  "Content-MD5"
/* Obsoleted.     HTML 4.01 Specification */
#define MHD_HTTP_HEADER_CONTENT_SCRIPT_TYPE "Content-Script-Type"
/* Obsoleted.     HTML 4.01 Specification */
#define MHD_HTTP_HEADER_CONTENT_STYLE_TYPE "Content-Style-Type"
/* Obsoleted.     RFC 2068: Hypertext Transfer Protocol -- HTTP/1.1 */
#define MHD_HTTP_HEADER_CONTENT_VERSION "Content-Version"
/* Obsoleted.     RFC 2965: HTTP State Management Mechanism; RFC 6265: HTTP State Management Mechanism */
#define MHD_HTTP_HEADER_COOKIE2      "Cookie2"
/* Obsoleted.     HTML 4.01 Specification */
#define MHD_HTTP_HEADER_DEFAULT_STYLE "Default-Style"
/* Obsoleted.     RFC 2068: Hypertext Transfer Protocol -- HTTP/1.1 */
#define MHD_HTTP_HEADER_DERIVED_FROM "Derived-From"
/* Obsoleted.     RFC 3230: Instance Digests in HTTP; RFC-ietf-httpbis-digest-headers-13, Section 1.3: Digest Fields */
#define MHD_HTTP_HEADER_DIGEST       "Digest"
/* Obsoleted.     RFC 2774: An HTTP Extension Framework; status-change-http-experiments-to-historic */
#define MHD_HTTP_HEADER_EXT          "Ext"
/* Obsoleted.     Implementation of OPS Over HTTP */
#define MHD_HTTP_HEADER_GETPROFILE   "GetProfile"
/* Obsoleted.     RFC 7540, Section 3.2.1: Hypertext Transfer Protocol Version 2 (HTTP/2) */
#define MHD_HTTP_HEADER_HTTP2_SETTINGS "HTTP2-Settings"
/* Obsoleted.     RFC 2774: An HTTP Extension Framework; status-change-http-experiments-to-historic */
#define MHD_HTTP_HEADER_MAN          "Man"
/* Obsoleted.     Access Control for Cross-site Requests */
#define MHD_HTTP_HEADER_METHOD_CHECK "Method-Check"
/* Obsoleted.     Access Control for Cross-site Requests */
#define MHD_HTTP_HEADER_METHOD_CHECK_EXPIRES "Method-Check-Expires"
/* Obsoleted.     RFC 2774: An HTTP Extension Framework; status-change-http-experiments-to-historic */
#define MHD_HTTP_HEADER_OPT          "Opt"
/* Obsoleted.     The Platform for Privacy Preferences 1.0 (P3P1.0) Specification */
#define MHD_HTTP_HEADER_P3P          "P3P"
/* Obsoleted.     PEP - an Extension Mechanism for HTTP */
#define MHD_HTTP_HEADER_PEP          "PEP"
/* Obsoleted.     PEP - an Extension Mechanism for HTTP */
#define MHD_HTTP_HEADER_PEP_INFO     "Pep-Info"
/* Obsoleted.     PICS Label Distribution Label Syntax and Communication Protocols */
#define MHD_HTTP_HEADER_PICS_LABEL   "PICS-Label"
/* Obsoleted.     Implementation of OPS Over HTTP */
#define MHD_HTTP_HEADER_PROFILEOBJECT "ProfileObject"
/* Obsoleted.     PICS Label Distribution Label Syntax and Communication Protocols */
#define MHD_HTTP_HEADER_PROTOCOL     "Protocol"
/* Obsoleted.     PICS Label Distribution Label Syntax and Communication Protocols */
#define MHD_HTTP_HEADER_PROTOCOL_REQUEST "Protocol-Request"
/* Obsoleted.     Notification for Proxy Caches */
#define MHD_HTTP_HEADER_PROXY_FEATURES "Proxy-Features"
/* Obsoleted.     Notification for Proxy Caches */
#define MHD_HTTP_HEADER_PROXY_INSTRUCTION "Proxy-Instruction"
/* Obsoleted.     RFC 2068: Hypertext Transfer Protocol -- HTTP/1.1 */
#define MHD_HTTP_HEADER_PUBLIC       "Public"
/* Obsoleted.     Access Control for Cross-site Requests */
#define MHD_HTTP_HEADER_REFERER_ROOT "Referer-Root"
/* Obsoleted.     RFC 2310: The Safe Response Header Field; status-change-http-experiments-to-historic */
#define MHD_HTTP_HEADER_SAFE         "Safe"
/* Obsoleted.     RFC 2660: The Secure HyperText Transfer Protocol; status-change-http-experiments-to-historic */
#define MHD_HTTP_HEADER_SECURITY_SCHEME "Security-Scheme"
/* Obsoleted.     RFC 2965: HTTP State Management Mechanism; RFC 6265: HTTP State Management Mechanism */
#define MHD_HTTP_HEADER_SET_COOKIE2  "Set-Cookie2"
/* Obsoleted.     Implementation of OPS Over HTTP */
#define MHD_HTTP_HEADER_SETPROFILE   "SetProfile"
/* Obsoleted.     RFC 2068: Hypertext Transfer Protocol -- HTTP/1.1 */
#define MHD_HTTP_HEADER_URI          "URI"
/* Obsoleted.     RFC 3230: Instance Digests in HTTP; RFC-ietf-httpbis-digest-headers-13, Section 1.3: Digest Fields */
#define MHD_HTTP_HEADER_WANT_DIGEST  "Want-Digest"
/* Obsoleted.     RFC9111, Section 5.5: HTTP Caching */
#define MHD_HTTP_HEADER_WARNING      "Warning"

/* Headers removed from the registry. Do not use! */
/* Obsoleted.     RFC4229 */
#define MHD_HTTP_HEADER_COMPLIANCE   "Compliance"
/* Obsoleted.     RFC4229 */
#define MHD_HTTP_HEADER_CONTENT_TRANSFER_ENCODING "Content-Transfer-Encoding"
/* Obsoleted.     RFC4229 */
#define MHD_HTTP_HEADER_COST         "Cost"
/* Obsoleted.     RFC4229 */
#define MHD_HTTP_HEADER_MESSAGE_ID   "Message-ID"
/* Obsoleted.     RFC4229 */
#define MHD_HTTP_HEADER_NON_COMPLIANCE "Non-Compliance"
/* Obsoleted.     RFC4229 */
#define MHD_HTTP_HEADER_OPTIONAL     "Optional"
/* Obsoleted.     RFC4229 */
#define MHD_HTTP_HEADER_RESOLUTION_HINT "Resolution-Hint"
/* Obsoleted.     RFC4229 */
#define MHD_HTTP_HEADER_RESOLVER_LOCATION "Resolver-Location"
/* Obsoleted.     RFC4229 */
#define MHD_HTTP_HEADER_SUBOK        "SubOK"
/* Obsoleted.     RFC4229 */
#define MHD_HTTP_HEADER_SUBST        "Subst"
/* Obsoleted.     RFC4229 */
#define MHD_HTTP_HEADER_TITLE        "Title"
/* Obsoleted.     RFC4229 */
#define MHD_HTTP_HEADER_UA_COLOR     "UA-Color"
/* Obsoleted.     RFC4229 */
#define MHD_HTTP_HEADER_UA_MEDIA     "UA-Media"
/* Obsoleted.     RFC4229 */
#define MHD_HTTP_HEADER_UA_PIXELS    "UA-Pixels"
/* Obsoleted.     RFC4229 */
#define MHD_HTTP_HEADER_UA_RESOLUTION "UA-Resolution"
/* Obsoleted.     RFC4229 */
#define MHD_HTTP_HEADER_UA_WINDOWPIXELS "UA-Windowpixels"
/* Obsoleted.     RFC4229 */
#define MHD_HTTP_HEADER_VERSION      "Version"
/* Obsoleted.     W3C Mobile Web Best Practices Working Group */
#define MHD_HTTP_HEADER_X_DEVICE_ACCEPT "X-Device-Accept"
/* Obsoleted.     W3C Mobile Web Best Practices Working Group */
#define MHD_HTTP_HEADER_X_DEVICE_ACCEPT_CHARSET "X-Device-Accept-Charset"
/* Obsoleted.     W3C Mobile Web Best Practices Working Group */
#define MHD_HTTP_HEADER_X_DEVICE_ACCEPT_ENCODING "X-Device-Accept-Encoding"
/* Obsoleted.     W3C Mobile Web Best Practices Working Group */
#define MHD_HTTP_HEADER_X_DEVICE_ACCEPT_LANGUAGE "X-Device-Accept-Language"
/* Obsoleted.     W3C Mobile Web Best Practices Working Group */
#define MHD_HTTP_HEADER_X_DEVICE_USER_AGENT "X-Device-User-Agent"
 /* end of group headers */

#define MHD_HTTP_VERSION_1_0 "HTTP/1.0"
#define MHD_HTTP_VERSION_1_1 "HTTP/1.1"
 /* end of group versions */

/* Main HTTP methods. */
/* Safe.     Idempotent.     RFC9110, Section 9.3.1. */
#define MHD_HTTP_METHOD_GET      "GET"
/* Safe.     Idempotent.     RFC9110, Section 9.3.2. */
#define MHD_HTTP_METHOD_HEAD     "HEAD"
/* Not safe. Not idempotent. RFC9110, Section 9.3.3. */
#define MHD_HTTP_METHOD_POST     "POST"
/* Not safe. Idempotent.     RFC9110, Section 9.3.4. */
#define MHD_HTTP_METHOD_PUT      "PUT"
/* Not safe. Idempotent.     RFC9110, Section 9.3.5. */
#define MHD_HTTP_METHOD_DELETE   "DELETE"
/* Not safe. Not idempotent. RFC9110, Section 9.3.6. */
#define MHD_HTTP_METHOD_CONNECT  "CONNECT"
/* Safe.     Idempotent.     RFC9110, Section 9.3.7. */
#define MHD_HTTP_METHOD_OPTIONS  "OPTIONS"
/* Safe.     Idempotent.     RFC9110, Section 9.3.8. */
#define MHD_HTTP_METHOD_TRACE    "TRACE"

/* Additional HTTP methods. */
/* Not safe. Idempotent.     RFC3744, Section 8.1. */
#define MHD_HTTP_METHOD_ACL            "ACL"
/* Not safe. Idempotent.     RFC3253, Section 12.6. */
#define MHD_HTTP_METHOD_BASELINE_CONTROL "BASELINE-CONTROL"
/* Not safe. Idempotent.     RFC5842, Section 4. */
#define MHD_HTTP_METHOD_BIND           "BIND"
/* Not safe. Idempotent.     RFC3253, Section 4.4, Section 9.4. */
#define MHD_HTTP_METHOD_CHECKIN        "CHECKIN"
/* Not safe. Idempotent.     RFC3253, Section 4.3, Section 8.8. */
#define MHD_HTTP_METHOD_CHECKOUT       "CHECKOUT"
/* Not safe. Idempotent.     RFC4918, Section 9.8. */
#define MHD_HTTP_METHOD_COPY           "COPY"
/* Not safe. Idempotent.     RFC3253, Section 8.2. */
#define MHD_HTTP_METHOD_LABEL          "LABEL"
/* Not safe. Idempotent.     RFC2068, Section 19.6.1.2. */
#define MHD_HTTP_METHOD_LINK           "LINK"
/* Not safe. Not idempotent. RFC4918, Section 9.10. */
#define MHD_HTTP_METHOD_LOCK           "LOCK"
/* Not safe. Idempotent.     RFC3253, Section 11.2. */
#define MHD_HTTP_METHOD_MERGE          "MERGE"
/* Not safe. Idempotent.     RFC3253, Section 13.5. */
#define MHD_HTTP_METHOD_MKACTIVITY     "MKACTIVITY"
/* Not safe. Idempotent.     RFC4791, Section 5.3.1; RFC8144, Section 2.3. */
#define MHD_HTTP_METHOD_MKCALENDAR     "MKCALENDAR"
/* Not safe. Idempotent.     RFC4918, Section 9.3; RFC5689, Section 3; RFC8144, Section 2.3. */
#define MHD_HTTP_METHOD_MKCOL          "MKCOL"
/* Not safe. Idempotent.     RFC4437, Section 6. */
#define MHD_HTTP_METHOD_MKREDIRECTREF  "MKREDIRECTREF"
/* Not safe. Idempotent.     RFC3253, Section 6.3. */
#define MHD_HTTP_METHOD_MKWORKSPACE    "MKWORKSPACE"
/* Not safe. Idempotent.     RFC4918, Section 9.9. */
#define MHD_HTTP_METHOD_MOVE           "MOVE"
/* Not safe. Idempotent.     RFC3648, Section 7. */
#define MHD_HTTP_METHOD_ORDERPATCH     "ORDERPATCH"
/* Not safe. Not idempotent. RFC5789, Section 2. */
#define MHD_HTTP_METHOD_PATCH          "PATCH"
/* Safe.     Idempotent.     RFC9113, Section 3.4. */
#define MHD_HTTP_METHOD_PRI            "PRI"
/* Safe.     Idempotent.     RFC4918, Section 9.1; RFC8144, Section 2.1. */
#define MHD_HTTP_METHOD_PROPFIND       "PROPFIND"
/* Not safe. Idempotent.     RFC4918, Section 9.2; RFC8144, Section 2.2. */
#define MHD_HTTP_METHOD_PROPPATCH      "PROPPATCH"
/* Not safe. Idempotent.     RFC5842, Section 6. */
#define MHD_HTTP_METHOD_REBIND         "REBIND"
/* Safe.     Idempotent.     RFC3253, Section 3.6; RFC8144, Section 2.1. */
#define MHD_HTTP_METHOD_REPORT         "REPORT"
/* Safe.     Idempotent.     RFC5323, Section 2. */
#define MHD_HTTP_METHOD_SEARCH         "SEARCH"
/* Not safe. Idempotent.     RFC5842, Section 5. */
#define MHD_HTTP_METHOD_UNBIND         "UNBIND"
/* Not safe. Idempotent.     RFC3253, Section 4.5. */
#define MHD_HTTP_METHOD_UNCHECKOUT     "UNCHECKOUT"
/* Not safe. Idempotent.     RFC2068, Section 19.6.1.3. */
#define MHD_HTTP_METHOD_UNLINK         "UNLINK"
/* Not safe. Idempotent.     RFC4918, Section 9.11. */
#define MHD_HTTP_METHOD_UNLOCK         "UNLOCK"
/* Not safe. Idempotent.     RFC3253, Section 7.1. */
#define MHD_HTTP_METHOD_UPDATE         "UPDATE"
/* Not safe. Idempotent.     RFC4437, Section 7. */
#define MHD_HTTP_METHOD_UPDATEREDIRECTREF "UPDATEREDIRECTREF"
/* Not safe. Idempotent.     RFC3253, Section 3.5. */
#define MHD_HTTP_METHOD_VERSION_CONTROL "VERSION-CONTROL"
/* Not safe. Not idempotent. RFC9110, Section 18.2. */
#define MHD_HTTP_METHOD_ASTERISK       "*"
 /* end of group methods */

#define MHD_HTTP_POST_ENCODING_FORM_URLENCODED \
  "application/x-www-form-urlencoded"
#define MHD_HTTP_POST_ENCODING_MULTIPART_FORMDATA "multipart/form-data"
 /* end of group postenc */


struct MHD_Daemon;

struct MHD_Connection;

struct MHD_Response;

struct MHD_PostProcessor;


enum MHD_FLAG
{
  MHD_NO_FLAG = 0,

  MHD_USE_ERROR_LOG = 1,

  MHD_USE_DEBUG = 1,

  MHD_USE_TLS = 2,

  MHD_USE_SSL = 2,
#if 0
  /* let's do this later once versions that define MHD_USE_TLS a more widely deployed. */
#define MHD_USE_SSL \
  _MHD_DEPR_IN_MACRO ("Value MHD_USE_SSL is deprecated, use MHD_USE_TLS") \
  MHD_USE_TLS
#endif

  MHD_USE_THREAD_PER_CONNECTION = 4,

  MHD_USE_INTERNAL_POLLING_THREAD = 8,

  MHD_USE_SELECT_INTERNALLY = 8,
#if 0 /* Will be marked for real deprecation later. */
#define MHD_USE_SELECT_INTERNALLY \
  _MHD_DEPR_IN_MACRO ( \
    "Value MHD_USE_SELECT_INTERNALLY is deprecated, use MHD_USE_INTERNAL_POLLING_THREAD instead") \
  MHD_USE_INTERNAL_POLLING_THREAD
#endif /* 0 */

  MHD_USE_IPv6 = 16,

  MHD_USE_PEDANTIC_CHECKS = 32,
#if 0 /* Will be marked for real deprecation later. */
#define MHD_USE_PEDANTIC_CHECKS \
  _MHD_DEPR_IN_MACRO ( \
    "Flag MHD_USE_PEDANTIC_CHECKS is deprecated, " \
    "use option MHD_OPTION_CLIENT_DISCIPLINE_LVL instead") \
  32
#endif /* 0 */

  MHD_USE_POLL = 64,

  MHD_USE_POLL_INTERNAL_THREAD = MHD_USE_POLL | MHD_USE_INTERNAL_POLLING_THREAD,

  MHD_USE_POLL_INTERNALLY = MHD_USE_POLL | MHD_USE_INTERNAL_POLLING_THREAD,
#if 0 /* Will be marked for real deprecation later. */
#define MHD_USE_POLL_INTERNALLY \
  _MHD_DEPR_IN_MACRO ( \
    "Value MHD_USE_POLL_INTERNALLY is deprecated, use MHD_USE_POLL_INTERNAL_THREAD instead") \
  MHD_USE_POLL_INTERNAL_THREAD
#endif /* 0 */

  MHD_USE_SUPPRESS_DATE_NO_CLOCK = 128,

  MHD_SUPPRESS_DATE_NO_CLOCK = 128,
#if 0 /* Will be marked for real deprecation later. */
#define MHD_SUPPRESS_DATE_NO_CLOCK \
  _MHD_DEPR_IN_MACRO ( \
    "Value MHD_SUPPRESS_DATE_NO_CLOCK is deprecated, use MHD_USE_SUPPRESS_DATE_NO_CLOCK instead") \
  MHD_USE_SUPPRESS_DATE_NO_CLOCK
#endif /* 0 */

  MHD_USE_NO_LISTEN_SOCKET = 256,

  MHD_USE_EPOLL = 512,

  MHD_USE_EPOLL_LINUX_ONLY = 512,
#if 0 /* Will be marked for real deprecation later. */
#define MHD_USE_EPOLL_LINUX_ONLY \
  _MHD_DEPR_IN_MACRO ( \
    "Value MHD_USE_EPOLL_LINUX_ONLY is deprecated, use MHD_USE_EPOLL") \
  MHD_USE_EPOLL
#endif /* 0 */

  MHD_USE_EPOLL_INTERNAL_THREAD = MHD_USE_EPOLL
                                  | MHD_USE_INTERNAL_POLLING_THREAD,

  MHD_USE_EPOLL_INTERNALLY = MHD_USE_EPOLL | MHD_USE_INTERNAL_POLLING_THREAD,
  MHD_USE_EPOLL_INTERNALLY_LINUX_ONLY = MHD_USE_EPOLL
                                        | MHD_USE_INTERNAL_POLLING_THREAD,
#if 0 /* Will be marked for real deprecation later. */
#define MHD_USE_EPOLL_INTERNALLY \
  _MHD_DEPR_IN_MACRO ( \
    "Value MHD_USE_EPOLL_INTERNALLY is deprecated, use MHD_USE_EPOLL_INTERNAL_THREAD") \
  MHD_USE_EPOLL_INTERNAL_THREAD

#define MHD_USE_EPOLL_INTERNALLY_LINUX_ONLY \
  _MHD_DEPR_IN_MACRO ( \
    "Value MHD_USE_EPOLL_INTERNALLY_LINUX_ONLY is deprecated, use MHD_USE_EPOLL_INTERNAL_THREAD") \
  MHD_USE_EPOLL_INTERNAL_THREAD
#endif /* 0 */

  MHD_USE_ITC = 1024,

  MHD_USE_PIPE_FOR_SHUTDOWN = 1024,
#if 0 /* Will be marked for real deprecation later. */
#define MHD_USE_PIPE_FOR_SHUTDOWN \
  _MHD_DEPR_IN_MACRO ( \
    "Value MHD_USE_PIPE_FOR_SHUTDOWN is deprecated, use MHD_USE_ITC") \
  MHD_USE_ITC
#endif /* 0 */

  MHD_USE_DUAL_STACK = MHD_USE_IPv6 | 2048,

  MHD_USE_TURBO = 4096,

  MHD_USE_EPOLL_TURBO = 4096,
#if 0 /* Will be marked for real deprecation later. */
#define MHD_USE_EPOLL_TURBO \
  _MHD_DEPR_IN_MACRO ( \
    "Value MHD_USE_EPOLL_TURBO is deprecated, use MHD_USE_TURBO") \
  MHD_USE_TURBO
#endif /* 0 */

  MHD_ALLOW_SUSPEND_RESUME = 8192 | MHD_USE_ITC,

  MHD_USE_SUSPEND_RESUME = 8192 | MHD_USE_ITC,
#if 0 /* Will be marked for real deprecation later. */
#define MHD_USE_SUSPEND_RESUME \
  _MHD_DEPR_IN_MACRO ( \
    "Value MHD_USE_SUSPEND_RESUME is deprecated, use MHD_ALLOW_SUSPEND_RESUME instead") \
  MHD_ALLOW_SUSPEND_RESUME
#endif /* 0 */

  MHD_USE_TCP_FASTOPEN = 16384,

  MHD_ALLOW_UPGRADE = 32768,

  MHD_USE_AUTO = 65536,

  MHD_USE_AUTO_INTERNAL_THREAD = MHD_USE_AUTO | MHD_USE_INTERNAL_POLLING_THREAD,

  MHD_USE_POST_HANDSHAKE_AUTH_SUPPORT = 1U << 17,

  MHD_USE_INSECURE_TLS_EARLY_DATA = 1U << 18,

  MHD_USE_NO_THREAD_SAFETY = 1U << 19

};


typedef void
(*MHD_LogCallback)(void *cls,
                   const char *fm,
                   va_list ap);


typedef int
(*MHD_PskServerCredentialsCallback)(void *cls,
                                    const struct MHD_Connection *connection,
                                    const char *username,
                                    void **psk,
                                    size_t *psk_size);

enum MHD_DAuthBindNonce
{
  MHD_DAUTH_BIND_NONCE_NONE = 0,

  MHD_DAUTH_BIND_NONCE_REALM = 1 << 0,

  MHD_DAUTH_BIND_NONCE_URI = 1 << 1,

  MHD_DAUTH_BIND_NONCE_URI_PARAMS = 1 << 2,

  MHD_DAUTH_BIND_NONCE_CLIENT_IP = 1 << 3
} _MHD_FLAGS_ENUM;

enum MHD_OPTION
{

  MHD_OPTION_END = 0,

  MHD_OPTION_CONNECTION_MEMORY_LIMIT = 1,

  MHD_OPTION_CONNECTION_LIMIT = 2,

  MHD_OPTION_CONNECTION_TIMEOUT = 3,

  MHD_OPTION_NOTIFY_COMPLETED = 4,

  MHD_OPTION_PER_IP_CONNECTION_LIMIT = 5,

  MHD_OPTION_SOCK_ADDR = 6,

  MHD_OPTION_URI_LOG_CALLBACK = 7,

  MHD_OPTION_HTTPS_MEM_KEY = 8,

  MHD_OPTION_HTTPS_MEM_CERT = 9,

  MHD_OPTION_HTTPS_CRED_TYPE = 10,

  MHD_OPTION_HTTPS_PRIORITIES = 11,

  MHD_OPTION_LISTEN_SOCKET = 12,

  MHD_OPTION_EXTERNAL_LOGGER = 13,

  MHD_OPTION_THREAD_POOL_SIZE = 14,

  MHD_OPTION_ARRAY = 15,

  MHD_OPTION_UNESCAPE_CALLBACK = 16,

  MHD_OPTION_DIGEST_AUTH_RANDOM = 17,

  MHD_OPTION_NONCE_NC_SIZE = 18,

  MHD_OPTION_THREAD_STACK_SIZE = 19,

  MHD_OPTION_HTTPS_MEM_TRUST = 20,

  MHD_OPTION_CONNECTION_MEMORY_INCREMENT = 21,

  MHD_OPTION_HTTPS_CERT_CALLBACK = 22,

  MHD_OPTION_TCP_FASTOPEN_QUEUE_SIZE = 23,

  MHD_OPTION_HTTPS_MEM_DHPARAMS = 24,

  MHD_OPTION_LISTENING_ADDRESS_REUSE = 25,

  MHD_OPTION_HTTPS_KEY_PASSWORD = 26,

  MHD_OPTION_NOTIFY_CONNECTION = 27,

  MHD_OPTION_LISTEN_BACKLOG_SIZE = 28,

  MHD_OPTION_STRICT_FOR_CLIENT = 29,

  MHD_OPTION_GNUTLS_PSK_CRED_HANDLER = 30,

  MHD_OPTION_HTTPS_CERT_CALLBACK2 = 31,

  MHD_OPTION_SERVER_INSANITY = 32,

  MHD_OPTION_SIGPIPE_HANDLED_BY_APP = 33,

  MHD_OPTION_TLS_NO_ALPN = 34,

  MHD_OPTION_DIGEST_AUTH_RANDOM_COPY = 35,

  MHD_OPTION_DIGEST_AUTH_NONCE_BIND_TYPE = 36,

  MHD_OPTION_HTTPS_PRIORITIES_APPEND = 37,

  MHD_OPTION_CLIENT_DISCIPLINE_LVL = 38,

  MHD_OPTION_APP_FD_SETSIZE = 39,

  MHD_OPTION_SOCK_ADDR_LEN = 40
  ,
  MHD_OPTION_DIGEST_AUTH_DEFAULT_NONCE_TIMEOUT = 41
  ,
  MHD_OPTION_DIGEST_AUTH_DEFAULT_MAX_NC = 42

} _MHD_FIXED_ENUM;


enum MHD_DisableSanityCheck
{
  MHD_DSC_SANE = 0

} _MHD_FIXED_FLAGS_ENUM;


struct MHD_OptionItem
{
  enum MHD_OPTION option;

  intptr_t value;

  void *ptr_value;

};


enum MHD_ValueKind
{

  MHD_RESPONSE_HEADER_KIND = 0,
#define MHD_RESPONSE_HEADER_KIND \
  _MHD_DEPR_IN_MACRO ( \
    "Value MHD_RESPONSE_HEADER_KIND is deprecated and not used") \
  MHD_RESPONSE_HEADER_KIND

  MHD_HEADER_KIND = 1,

  MHD_COOKIE_KIND = 2,

  MHD_POSTDATA_KIND = 4,

  MHD_GET_ARGUMENT_KIND = 8,

  MHD_FOOTER_KIND = 16
} _MHD_FIXED_ENUM;


enum MHD_RequestTerminationCode
{

  MHD_REQUEST_TERMINATED_COMPLETED_OK = 0,

  MHD_REQUEST_TERMINATED_WITH_ERROR = 1,

  MHD_REQUEST_TERMINATED_TIMEOUT_REACHED = 2,

  MHD_REQUEST_TERMINATED_DAEMON_SHUTDOWN = 3,

  MHD_REQUEST_TERMINATED_READ_ERROR = 4,

  MHD_REQUEST_TERMINATED_CLIENT_ABORT = 5

} _MHD_FIXED_ENUM;


enum MHD_ConnectionNotificationCode
{

  MHD_CONNECTION_NOTIFY_STARTED = 0,

  MHD_CONNECTION_NOTIFY_CLOSED = 1

} _MHD_FIXED_ENUM;


union MHD_ConnectionInfo
{

  int /* enum gnutls_cipher_algorithm */ cipher_algorithm;

  int /* enum gnutls_protocol */ protocol;

  int /* MHD_YES or MHD_NO */ suspended;

  unsigned int connection_timeout;

  unsigned int http_status;

  MHD_socket connect_fd;

  size_t header_size;

  void * /* gnutls_session_t */ tls_session;

  void * /* gnutls_x509_crt_t */ client_cert;

  struct sockaddr *client_addr;

  struct MHD_Daemon *daemon;

  void *socket_context;
};


struct MHD_IoVec
{
  const void *iov_base;

  size_t iov_len;
};


enum MHD_ConnectionInfoType
{
  MHD_CONNECTION_INFO_CIPHER_ALGO,

  MHD_CONNECTION_INFO_PROTOCOL,

  MHD_CONNECTION_INFO_CLIENT_ADDRESS,

  MHD_CONNECTION_INFO_GNUTLS_SESSION,

  MHD_CONNECTION_INFO_GNUTLS_CLIENT_CERT,

  MHD_CONNECTION_INFO_DAEMON,

  MHD_CONNECTION_INFO_CONNECTION_FD,

  MHD_CONNECTION_INFO_SOCKET_CONTEXT,

  MHD_CONNECTION_INFO_CONNECTION_SUSPENDED,

  MHD_CONNECTION_INFO_CONNECTION_TIMEOUT,

  MHD_CONNECTION_INFO_REQUEST_HEADER_SIZE,

  MHD_CONNECTION_INFO_HTTP_STATUS

} _MHD_FIXED_ENUM;


enum MHD_DaemonInfoType
{
  MHD_DAEMON_INFO_KEY_SIZE,

  MHD_DAEMON_INFO_MAC_KEY_SIZE,

  MHD_DAEMON_INFO_LISTEN_FD,

  MHD_DAEMON_INFO_EPOLL_FD_LINUX_ONLY,
  MHD_DAEMON_INFO_EPOLL_FD = MHD_DAEMON_INFO_EPOLL_FD_LINUX_ONLY,

  MHD_DAEMON_INFO_CURRENT_CONNECTIONS,

  MHD_DAEMON_INFO_FLAGS,

  MHD_DAEMON_INFO_BIND_PORT
} _MHD_FIXED_ENUM;


typedef void
(*MHD_PanicCallback) (void *cls,
                      const char *file,
                      unsigned int line,
                      const char *reason);

typedef enum MHD_Result
(*MHD_AcceptPolicyCallback)(void *cls,
                            const struct sockaddr *addr,
                            socklen_t addrlen);


typedef enum MHD_Result
(*MHD_AccessHandlerCallback)(void *cls,
                             struct MHD_Connection *connection,
                             const char *url,
                             const char *method,
                             const char *version,
                             const char *upload_data,
                             size_t *upload_data_size,
                             void **req_cls);


typedef void
(*MHD_RequestCompletedCallback) (void *cls,
                                 struct MHD_Connection *connection,
                                 void **req_cls,
                                 enum MHD_RequestTerminationCode toe);


typedef void
(*MHD_NotifyConnectionCallback) (void *cls,
                                 struct MHD_Connection *connection,
                                 void **socket_context,
                                 enum MHD_ConnectionNotificationCode toe);


typedef enum MHD_Result
(*MHD_KeyValueIterator)(void *cls,
                        enum MHD_ValueKind kind,
                        const char *key,
                        const char *value);


typedef enum MHD_Result
(*MHD_KeyValueIteratorN)(void *cls,
                         enum MHD_ValueKind kind,
                         const char *key,
                         size_t key_size,
                         const char *value,
                         size_t value_size);


typedef ssize_t
(*MHD_ContentReaderCallback) (void *cls,
                              uint64_t pos,
                              char *buf,
                              size_t max);


typedef void
(*MHD_ContentReaderFreeCallback) (void *cls);


typedef enum MHD_Result
(*MHD_PostDataIterator)(void *cls,
                        enum MHD_ValueKind kind,
                        const char *key,
                        const char *filename,
                        const char *content_type,
                        const char *transfer_encoding,
                        const char *data,
                        uint64_t off,
                        size_t size);

/* **************** Daemon handling functions ***************** */

_MHD_EXTERN struct MHD_Daemon *
MHD_start_daemon_va (unsigned int flags,
                     uint16_t port,
                     MHD_AcceptPolicyCallback apc, void *apc_cls,
                     MHD_AccessHandlerCallback dh, void *dh_cls,
                     va_list ap);


_MHD_EXTERN struct MHD_Daemon *
MHD_start_daemon (unsigned int flags,
                  uint16_t port,
                  MHD_AcceptPolicyCallback apc, void *apc_cls,
                  MHD_AccessHandlerCallback dh, void *dh_cls,
                  ...);


_MHD_EXTERN MHD_socket
MHD_quiesce_daemon (struct MHD_Daemon *daemon);


_MHD_EXTERN void
MHD_stop_daemon (struct MHD_Daemon *daemon);


_MHD_EXTERN enum MHD_Result
MHD_add_connection (struct MHD_Daemon *daemon,
                    MHD_socket client_socket,
                    const struct sockaddr *addr,
                    socklen_t addrlen);


_MHD_EXTERN enum MHD_Result
MHD_get_fdset (struct MHD_Daemon *daemon,
               fd_set *read_fd_set,
               fd_set *write_fd_set,
               fd_set *except_fd_set,
               MHD_socket *max_fd);


_MHD_EXTERN enum MHD_Result
MHD_get_fdset2 (struct MHD_Daemon *daemon,
                fd_set *read_fd_set,
                fd_set *write_fd_set,
                fd_set *except_fd_set,
                MHD_socket *max_fd,
                unsigned int fd_setsize);


#define MHD_get_fdset(daemon,read_fd_set,write_fd_set,except_fd_set,max_fd) \
  MHD_get_fdset2 ((daemon),(read_fd_set),(write_fd_set),(except_fd_set), \
                  (max_fd),FD_SETSIZE)


_MHD_EXTERN enum MHD_Result
MHD_get_timeout (struct MHD_Daemon *daemon,
                 MHD_UNSIGNED_LONG_LONG *timeout);


_MHD_EXTERN void
MHD_free (void *ptr);

_MHD_EXTERN enum MHD_Result
MHD_get_timeout64 (struct MHD_Daemon *daemon,
                   uint64_t *timeout);


_MHD_EXTERN int64_t
MHD_get_timeout64s (struct MHD_Daemon *daemon);


_MHD_EXTERN int
MHD_get_timeout_i (struct MHD_Daemon *daemon);


_MHD_EXTERN enum MHD_Result
MHD_run (struct MHD_Daemon *daemon);


_MHD_EXTERN enum MHD_Result
MHD_run_wait (struct MHD_Daemon *daemon,
              int32_t millisec);


_MHD_EXTERN enum MHD_Result
MHD_run_from_select (struct MHD_Daemon *daemon,
                     const fd_set *read_fd_set,
                     const fd_set *write_fd_set,
                     const fd_set *except_fd_set);


_MHD_EXTERN enum MHD_Result
MHD_run_from_select2 (struct MHD_Daemon *daemon,
                      const fd_set *read_fd_set,
                      const fd_set *write_fd_set,
                      const fd_set *except_fd_set,
                      unsigned int fd_setsize);


#define MHD_run_from_select(d,r,w,e) \
  MHD_run_from_select2((d),(r),(w),(e),(unsigned int)(FD_SETSIZE))

/* **************** Connection handling functions ***************** */

_MHD_EXTERN int
MHD_get_connection_values (struct MHD_Connection *connection,
                           enum MHD_ValueKind kind,
                           MHD_KeyValueIterator iterator,
                           void *iterator_cls);


_MHD_EXTERN int
MHD_get_connection_values_n (struct MHD_Connection *connection,
                             enum MHD_ValueKind kind,
                             MHD_KeyValueIteratorN iterator,
                             void *iterator_cls);


_MHD_EXTERN enum MHD_Result
MHD_set_connection_value (struct MHD_Connection *connection,
                          enum MHD_ValueKind kind,
                          const char *key,
                          const char *value);


_MHD_EXTERN enum MHD_Result
MHD_set_connection_value_n (struct MHD_Connection *connection,
                            enum MHD_ValueKind kind,
                            const char *key,
                            size_t key_size,
                            const char *value,
                            size_t value_size);


_MHD_EXTERN void
MHD_set_panic_func (MHD_PanicCallback cb, void *cls);


_MHD_EXTERN size_t
MHD_http_unescape (char *val);


_MHD_EXTERN const char *
MHD_lookup_connection_value (struct MHD_Connection *connection,
                             enum MHD_ValueKind kind,
                             const char *key);


_MHD_EXTERN enum MHD_Result
MHD_lookup_connection_value_n (struct MHD_Connection *connection,
                               enum MHD_ValueKind kind,
                               const char *key,
                               size_t key_size,
                               const char **value_ptr,
                               size_t *value_size_ptr);


_MHD_EXTERN enum MHD_Result
MHD_queue_response (struct MHD_Connection *connection,
                    unsigned int status_code,
                    struct MHD_Response *response);


_MHD_EXTERN void
MHD_suspend_connection (struct MHD_Connection *connection);


_MHD_EXTERN void
MHD_resume_connection (struct MHD_Connection *connection);


/* **************** Response manipulation functions ***************** */


enum MHD_ResponseFlags
{
  MHD_RF_NONE = 0,

  MHD_RF_HTTP_1_0_COMPATIBLE_STRICT = 1 << 0,
  MHD_RF_HTTP_VERSION_1_0_ONLY = 1 << 0,

  MHD_RF_HTTP_1_0_SERVER = 1 << 1,
  MHD_RF_HTTP_VERSION_1_0_RESPONSE = 1 << 1,

  MHD_RF_INSANITY_HEADER_CONTENT_LENGTH = 1 << 2,

  MHD_RF_SEND_KEEP_ALIVE_HEADER = 1 << 3,

  MHD_RF_HEAD_ONLY_RESPONSE = 1 << 4
} _MHD_FIXED_FLAGS_ENUM;


enum MHD_ResponseOptions
{
  MHD_RO_END = 0
} _MHD_FIXED_ENUM;


_MHD_EXTERN enum MHD_Result
MHD_set_response_options (struct MHD_Response *response,
                          enum MHD_ResponseFlags flags,
                          ...);


_MHD_EXTERN struct MHD_Response *
MHD_create_response_from_callback (uint64_t size,
                                   size_t block_size,
                                   MHD_ContentReaderCallback crc, void *crc_cls,
                                   MHD_ContentReaderFreeCallback crfc);


_MHD_DEPR_FUNC ("MHD_create_response_from_data() is deprecated, " \
                "use MHD_create_response_from_buffer()") \
  _MHD_EXTERN struct MHD_Response *
MHD_create_response_from_data (size_t size,
                               void *data,
                               int must_free,
                               int must_copy);


enum MHD_ResponseMemoryMode
{

  MHD_RESPMEM_PERSISTENT,

  MHD_RESPMEM_MUST_FREE,

  MHD_RESPMEM_MUST_COPY

} _MHD_FIXED_ENUM;


_MHD_EXTERN struct MHD_Response *
MHD_create_response_from_buffer (size_t size,
                                 void *buffer,
                                 enum MHD_ResponseMemoryMode mode);


_MHD_EXTERN struct MHD_Response *
MHD_create_response_from_buffer_static (size_t size,
                                        const void *buffer);


_MHD_EXTERN struct MHD_Response *
MHD_create_response_from_buffer_copy (size_t size,
                                      const void *buffer);


_MHD_EXTERN struct MHD_Response *
MHD_create_response_from_buffer_with_free_callback (size_t size,
                                                    void *buffer,
                                                    MHD_ContentReaderFreeCallback
                                                    crfc);


_MHD_EXTERN struct MHD_Response *
MHD_create_response_from_buffer_with_free_callback_cls (size_t size,
                                                        const void *buffer,
                                                        MHD_ContentReaderFreeCallback
                                                        crfc,
                                                        void *crfc_cls);


_MHD_EXTERN struct MHD_Response *
MHD_create_response_from_fd (size_t size,
                             int fd);


_MHD_EXTERN struct MHD_Response *
MHD_create_response_from_pipe (int fd);


_MHD_EXTERN struct MHD_Response *
MHD_create_response_from_fd64 (uint64_t size,
                               int fd);


_MHD_DEPR_FUNC ("Function MHD_create_response_from_fd_at_offset() is " \
                "deprecated, use MHD_create_response_from_fd_at_offset64()") \
  _MHD_EXTERN struct MHD_Response *
MHD_create_response_from_fd_at_offset (size_t size,
                                       int fd,
                                       off_t offset);

#if ! defined(_MHD_NO_DEPR_IN_MACRO) || defined(_MHD_NO_DEPR_FUNC)
/* Substitute MHD_create_response_from_fd_at_offset64() instead of MHD_create_response_from_fd_at_offset()
   to minimize potential problems with different off_t sizes */
#define MHD_create_response_from_fd_at_offset(size,fd,offset) \
  _MHD_DEPR_IN_MACRO ( \
    "Usage of MHD_create_response_from_fd_at_offset() is deprecated, use MHD_create_response_from_fd_at_offset64()") \
  MHD_create_response_from_fd_at_offset64 ((size),(fd),(offset))
#endif /* !_MHD_NO_DEPR_IN_MACRO || _MHD_NO_DEPR_FUNC */


_MHD_EXTERN struct MHD_Response *
MHD_create_response_from_fd_at_offset64 (uint64_t size,
                                         int fd,
                                         uint64_t offset);


_MHD_EXTERN struct MHD_Response *
MHD_create_response_from_iovec (const struct MHD_IoVec *iov,
                                unsigned int iovcnt,
                                MHD_ContentReaderFreeCallback free_cb,
                                void *cls);


_MHD_EXTERN struct MHD_Response *
MHD_create_response_empty (enum MHD_ResponseFlags flags);


enum MHD_UpgradeAction
{

  MHD_UPGRADE_ACTION_CLOSE = 0,

  MHD_UPGRADE_ACTION_CORK_ON = 1,

  MHD_UPGRADE_ACTION_CORK_OFF = 2

} _MHD_FIXED_ENUM;


struct MHD_UpgradeResponseHandle;


_MHD_EXTERN enum MHD_Result
MHD_upgrade_action (struct MHD_UpgradeResponseHandle *urh,
                    enum MHD_UpgradeAction action,
                    ...);


typedef void
(*MHD_UpgradeHandler)(void *cls,
                      struct MHD_Connection *connection,
                      void *req_cls,
                      const char *extra_in,
                      size_t extra_in_size,
                      MHD_socket sock,
                      struct MHD_UpgradeResponseHandle *urh);


_MHD_EXTERN struct MHD_Response *
MHD_create_response_for_upgrade (MHD_UpgradeHandler upgrade_handler,
                                 void *upgrade_handler_cls);


_MHD_EXTERN void
MHD_destroy_response (struct MHD_Response *response);


_MHD_EXTERN enum MHD_Result
MHD_add_response_header (struct MHD_Response *response,
                         const char *header,
                         const char *content);


_MHD_EXTERN enum MHD_Result
MHD_add_response_footer (struct MHD_Response *response,
                         const char *footer,
                         const char *content);


_MHD_EXTERN enum MHD_Result
MHD_del_response_header (struct MHD_Response *response,
                         const char *header,
                         const char *content);


_MHD_EXTERN int
MHD_get_response_headers (struct MHD_Response *response,
                          MHD_KeyValueIterator iterator,
                          void *iterator_cls);


_MHD_EXTERN const char *
MHD_get_response_header (struct MHD_Response *response,
                         const char *key);


/* ********************** PostProcessor functions ********************** */

_MHD_EXTERN struct MHD_PostProcessor *
MHD_create_post_processor (struct MHD_Connection *connection,
                           size_t buffer_size,
                           MHD_PostDataIterator iter, void *iter_cls);


_MHD_EXTERN enum MHD_Result
MHD_post_process (struct MHD_PostProcessor *pp,
                  const char *post_data,
                  size_t post_data_len);


_MHD_EXTERN enum MHD_Result
MHD_destroy_post_processor (struct MHD_PostProcessor *pp);


/* ********************* Digest Authentication functions *************** */


#define MHD_MD5_DIGEST_SIZE 16

#define MHD_SHA256_DIGEST_SIZE 32

#define MHD_SHA512_256_DIGEST_SIZE 32

enum MHD_DigestBaseAlgo
{
  MHD_DIGEST_BASE_ALGO_INVALID = 0,

  MHD_DIGEST_BASE_ALGO_MD5 = (1 << 0),

  MHD_DIGEST_BASE_ALGO_SHA256 = (1 << 1),

  MHD_DIGEST_BASE_ALGO_SHA512_256 = (1 << 2)
} _MHD_FIXED_FLAGS_ENUM;

#define MHD_DIGEST_AUTH_ALGO3_NON_SESSION    (1 << 6)

#define MHD_DIGEST_AUTH_ALGO3_SESSION        (1 << 7)

enum MHD_DigestAuthAlgo3
{
  MHD_DIGEST_AUTH_ALGO3_INVALID = 0,

  MHD_DIGEST_AUTH_ALGO3_MD5 =
    MHD_DIGEST_BASE_ALGO_MD5 | MHD_DIGEST_AUTH_ALGO3_NON_SESSION,

  MHD_DIGEST_AUTH_ALGO3_MD5_SESSION =
    MHD_DIGEST_BASE_ALGO_MD5 | MHD_DIGEST_AUTH_ALGO3_SESSION,

  MHD_DIGEST_AUTH_ALGO3_SHA256 =
    MHD_DIGEST_BASE_ALGO_SHA256 | MHD_DIGEST_AUTH_ALGO3_NON_SESSION,

  MHD_DIGEST_AUTH_ALGO3_SHA256_SESSION =
    MHD_DIGEST_BASE_ALGO_SHA256 | MHD_DIGEST_AUTH_ALGO3_SESSION,

  MHD_DIGEST_AUTH_ALGO3_SHA512_256 =
    MHD_DIGEST_BASE_ALGO_SHA512_256 | MHD_DIGEST_AUTH_ALGO3_NON_SESSION,

  MHD_DIGEST_AUTH_ALGO3_SHA512_256_SESSION =
    MHD_DIGEST_BASE_ALGO_SHA512_256 | MHD_DIGEST_AUTH_ALGO3_SESSION
};


_MHD_EXTERN size_t
MHD_digest_get_hash_size (enum MHD_DigestAuthAlgo3 algo3);

enum MHD_DigestAuthMultiAlgo3
{
  MHD_DIGEST_AUTH_MULT_ALGO3_INVALID = MHD_DIGEST_AUTH_ALGO3_INVALID,

  MHD_DIGEST_AUTH_MULT_ALGO3_MD5 = MHD_DIGEST_AUTH_ALGO3_MD5,

  MHD_DIGEST_AUTH_MULT_ALGO3_MD5_SESSION = MHD_DIGEST_AUTH_ALGO3_MD5_SESSION,

  MHD_DIGEST_AUTH_MULT_ALGO3_SHA256 = MHD_DIGEST_AUTH_ALGO3_SHA256,

  MHD_DIGEST_AUTH_MULT_ALGO3_SHA256_SESSION =
    MHD_DIGEST_AUTH_ALGO3_SHA256_SESSION,

  MHD_DIGEST_AUTH_MULT_ALGO3_SHA512_256 = MHD_DIGEST_AUTH_ALGO3_SHA512_256,

  MHD_DIGEST_AUTH_MULT_ALGO3_SHA512_256_SESSION =
    MHD_DIGEST_AUTH_ALGO3_SHA512_256_SESSION,

  MHD_DIGEST_AUTH_MULT_ALGO3_SHA_ANY_NON_SESSION =
    MHD_DIGEST_AUTH_ALGO3_SHA256 | MHD_DIGEST_AUTH_ALGO3_SHA512_256,

  MHD_DIGEST_AUTH_MULT_ALGO3_ANY_NON_SESSION =
    (0x3F) | MHD_DIGEST_AUTH_ALGO3_NON_SESSION,

  MHD_DIGEST_AUTH_MULT_ALGO3_SHA_ANY_SESSION =
    MHD_DIGEST_AUTH_ALGO3_SHA256_SESSION
    | MHD_DIGEST_AUTH_ALGO3_SHA512_256_SESSION,

  MHD_DIGEST_AUTH_MULT_ALGO3_ANY_SESSION =
    (0x3F) | MHD_DIGEST_AUTH_ALGO3_SESSION,

  MHD_DIGEST_AUTH_MULT_ALGO3_MD5_ANY =
    MHD_DIGEST_AUTH_MULT_ALGO3_MD5 | MHD_DIGEST_AUTH_MULT_ALGO3_MD5_SESSION,

  MHD_DIGEST_AUTH_MULT_ALGO3_SHA256_ANY =
    MHD_DIGEST_AUTH_MULT_ALGO3_SHA256
    | MHD_DIGEST_AUTH_MULT_ALGO3_SHA256_SESSION,

  MHD_DIGEST_AUTH_MULT_ALGO3_SHA512_256_ANY =
    MHD_DIGEST_AUTH_MULT_ALGO3_SHA512_256
    | MHD_DIGEST_AUTH_MULT_ALGO3_SHA512_256_SESSION,

  MHD_DIGEST_AUTH_MULT_ALGO3_SHA_ANY_ANY =
    MHD_DIGEST_AUTH_MULT_ALGO3_SHA_ANY_NON_SESSION
    | MHD_DIGEST_AUTH_MULT_ALGO3_SHA_ANY_SESSION,

  MHD_DIGEST_AUTH_MULT_ALGO3_ANY =
    (0x3F) | MHD_DIGEST_AUTH_ALGO3_NON_SESSION | MHD_DIGEST_AUTH_ALGO3_SESSION
};


_MHD_EXTERN enum MHD_Result
MHD_digest_auth_calc_userhash (enum MHD_DigestAuthAlgo3 algo3,
                               const char *username,
                               const char *realm,
                               void *userhash_bin,
                               size_t bin_buf_size);


_MHD_EXTERN enum MHD_Result
MHD_digest_auth_calc_userhash_hex (enum MHD_DigestAuthAlgo3 algo3,
                                   const char *username,
                                   const char *realm,
                                   char *userhash_hex,
                                   size_t hex_buf_size);


enum MHD_DigestAuthUsernameType
{
  MHD_DIGEST_AUTH_UNAME_TYPE_MISSING = 0,

  MHD_DIGEST_AUTH_UNAME_TYPE_STANDARD = (1 << 2),

  MHD_DIGEST_AUTH_UNAME_TYPE_EXTENDED = (1 << 3),

  MHD_DIGEST_AUTH_UNAME_TYPE_USERHASH = (1 << 1),

  MHD_DIGEST_AUTH_UNAME_TYPE_INVALID = (1 << 0)
} _MHD_FIXED_ENUM;

enum MHD_DigestAuthQOP
{
  MHD_DIGEST_AUTH_QOP_INVALID = 0,

  MHD_DIGEST_AUTH_QOP_NONE = 1 << 0,

  MHD_DIGEST_AUTH_QOP_AUTH = 1 << 1,

  MHD_DIGEST_AUTH_QOP_AUTH_INT = 1 << 2
} _MHD_FIXED_FLAGS_ENUM;

enum MHD_DigestAuthMultiQOP
{
  MHD_DIGEST_AUTH_MULT_QOP_INVALID = MHD_DIGEST_AUTH_QOP_INVALID,

  MHD_DIGEST_AUTH_MULT_QOP_NONE = MHD_DIGEST_AUTH_QOP_NONE,

  MHD_DIGEST_AUTH_MULT_QOP_AUTH = MHD_DIGEST_AUTH_QOP_AUTH,

  MHD_DIGEST_AUTH_MULT_QOP_AUTH_INT = MHD_DIGEST_AUTH_QOP_AUTH_INT,

  MHD_DIGEST_AUTH_MULT_QOP_ANY_NON_INT =
    MHD_DIGEST_AUTH_QOP_NONE | MHD_DIGEST_AUTH_QOP_AUTH,

  MHD_DIGEST_AUTH_MULT_QOP_AUTH_ANY =
    MHD_DIGEST_AUTH_QOP_AUTH | MHD_DIGEST_AUTH_QOP_AUTH_INT
} _MHD_FIXED_ENUM;

#define MHD_DIGEST_AUTH_INVALID_NC_VALUE        (0)

struct MHD_DigestAuthInfo
{
  enum MHD_DigestAuthAlgo3 algo3;

  enum MHD_DigestAuthUsernameType uname_type;

  char *username;

  size_t username_len;

  char *userhash_hex;

  size_t userhash_hex_len;

  uint8_t *userhash_bin;

  char *opaque;

  size_t opaque_len;

  char *realm;

  size_t realm_len;

  enum MHD_DigestAuthQOP qop;

  size_t cnonce_len;

  uint32_t nc;
};


_MHD_EXTERN struct MHD_DigestAuthInfo *
MHD_digest_auth_get_request_info3 (struct MHD_Connection *connection);


struct MHD_DigestAuthUsernameInfo
{
  enum MHD_DigestAuthAlgo3 algo3;

  enum MHD_DigestAuthUsernameType uname_type;

  char *username;

  size_t username_len;

  char *userhash_hex;

  size_t userhash_hex_len;

  uint8_t *userhash_bin;
};


_MHD_EXTERN struct MHD_DigestAuthUsernameInfo *
MHD_digest_auth_get_username3 (struct MHD_Connection *connection);


enum MHD_DigestAuthResult
{
  MHD_DAUTH_OK = 1,

  MHD_DAUTH_ERROR = 0,

  MHD_DAUTH_WRONG_HEADER = -1,

  MHD_DAUTH_WRONG_USERNAME = -2,

  MHD_DAUTH_WRONG_REALM = -3,

  MHD_DAUTH_WRONG_URI = -4,

  MHD_DAUTH_WRONG_QOP = -5,

  MHD_DAUTH_WRONG_ALGO = -6,

  MHD_DAUTH_TOO_LARGE = -15,

  /* The different form of naming is intentionally used for the results below,
   * as they are more important */

  MHD_DAUTH_NONCE_STALE = -17,

  MHD_DAUTH_NONCE_OTHER_COND = -18,

  MHD_DAUTH_NONCE_WRONG = -33,

  MHD_DAUTH_RESPONSE_WRONG = -34
};


_MHD_EXTERN enum MHD_DigestAuthResult
MHD_digest_auth_check3 (struct MHD_Connection *connection,
                        const char *realm,
                        const char *username,
                        const char *password,
                        unsigned int nonce_timeout,
                        uint32_t max_nc,
                        enum MHD_DigestAuthMultiQOP mqop,
                        enum MHD_DigestAuthMultiAlgo3 malgo3);


_MHD_EXTERN enum MHD_Result
MHD_digest_auth_calc_userdigest (enum MHD_DigestAuthAlgo3 algo3,
                                 const char *username,
                                 const char *realm,
                                 const char *password,
                                 void *userdigest_bin,
                                 size_t bin_buf_size);


_MHD_EXTERN enum MHD_DigestAuthResult
MHD_digest_auth_check_digest3 (struct MHD_Connection *connection,
                               const char *realm,
                               const char *username,
                               const void *userdigest,
                               size_t userdigest_size,
                               unsigned int nonce_timeout,
                               uint32_t max_nc,
                               enum MHD_DigestAuthMultiQOP mqop,
                               enum MHD_DigestAuthMultiAlgo3 malgo3);


_MHD_EXTERN enum MHD_Result
MHD_queue_auth_required_response3 (struct MHD_Connection *connection,
                                   const char *realm,
                                   const char *opaque,
                                   const char *domain,
                                   struct MHD_Response *response,
                                   int signal_stale,
                                   enum MHD_DigestAuthMultiQOP mqop,
                                   enum MHD_DigestAuthMultiAlgo3 algo,
                                   int userhash_support,
                                   int prefer_utf8);


#define MHD_INVALID_NONCE -1


_MHD_EXTERN char *
MHD_digest_auth_get_username (struct MHD_Connection *connection);


enum MHD_DigestAuthAlgorithm
{

  MHD_DIGEST_ALG_AUTO = 0,

  MHD_DIGEST_ALG_MD5,

  MHD_DIGEST_ALG_SHA256

} _MHD_FIXED_ENUM;


_MHD_EXTERN int
MHD_digest_auth_check2 (struct MHD_Connection *connection,
                        const char *realm,
                        const char *username,
                        const char *password,
                        unsigned int nonce_timeout,
                        enum MHD_DigestAuthAlgorithm algo);


_MHD_EXTERN int
MHD_digest_auth_check (struct MHD_Connection *connection,
                       const char *realm,
                       const char *username,
                       const char *password,
                       unsigned int nonce_timeout);


_MHD_EXTERN int
MHD_digest_auth_check_digest2 (struct MHD_Connection *connection,
                               const char *realm,
                               const char *username,
                               const uint8_t *digest,
                               size_t digest_size,
                               unsigned int nonce_timeout,
                               enum MHD_DigestAuthAlgorithm algo);


_MHD_EXTERN int
MHD_digest_auth_check_digest (struct MHD_Connection *connection,
                              const char *realm,
                              const char *username,
                              const uint8_t digest[MHD_MD5_DIGEST_SIZE],
                              unsigned int nonce_timeout);


_MHD_EXTERN enum MHD_Result
MHD_queue_auth_fail_response2 (struct MHD_Connection *connection,
                               const char *realm,
                               const char *opaque,
                               struct MHD_Response *response,
                               int signal_stale,
                               enum MHD_DigestAuthAlgorithm algo);


_MHD_EXTERN enum MHD_Result
MHD_queue_auth_fail_response (struct MHD_Connection *connection,
                              const char *realm,
                              const char *opaque,
                              struct MHD_Response *response,
                              int signal_stale);


/* ********************* Basic Authentication functions *************** */


struct MHD_BasicAuthInfo
{
  char *username;

  size_t username_len;

  char *password;

  size_t password_len;
};

_MHD_EXTERN struct MHD_BasicAuthInfo *
MHD_basic_auth_get_username_password3 (struct MHD_Connection *connection);

_MHD_EXTERN enum MHD_Result
MHD_queue_basic_auth_required_response3 (struct MHD_Connection *connection,
                                         const char *realm,
                                         int prefer_utf8,
                                         struct MHD_Response *response);

_MHD_EXTERN char *
MHD_basic_auth_get_username_password (struct MHD_Connection *connection,
                                      char **password);


_MHD_EXTERN enum MHD_Result
MHD_queue_basic_auth_fail_response (struct MHD_Connection *connection,
                                    const char *realm,
                                    struct MHD_Response *response);

/* ********************** generic query functions ********************** */


_MHD_EXTERN const union MHD_ConnectionInfo *
MHD_get_connection_info (struct MHD_Connection *connection,
                         enum MHD_ConnectionInfoType info_type,
                         ...);


enum MHD_CONNECTION_OPTION
{

  MHD_CONNECTION_OPTION_TIMEOUT

} _MHD_FIXED_ENUM;


_MHD_EXTERN enum MHD_Result
MHD_set_connection_option (struct MHD_Connection *connection,
                           enum MHD_CONNECTION_OPTION option,
                           ...);


union MHD_DaemonInfo
{
  size_t key_size;

  size_t mac_key_size;

  MHD_socket listen_fd;

  uint16_t port;

  int epoll_fd;

  unsigned int num_connections;

  enum MHD_FLAG flags;
};


_MHD_EXTERN const union MHD_DaemonInfo *
MHD_get_daemon_info (struct MHD_Daemon *daemon,
                     enum MHD_DaemonInfoType info_type,
                     ...);


_MHD_EXTERN const char *
MHD_get_version (void);


_MHD_EXTERN uint32_t
MHD_get_version_bin (void);


enum MHD_FEATURE
{
  MHD_FEATURE_MESSAGES = 1,

  MHD_FEATURE_TLS = 2,
  MHD_FEATURE_SSL = 2,

  MHD_FEATURE_HTTPS_CERT_CALLBACK = 3,

  MHD_FEATURE_IPv6 = 4,

  MHD_FEATURE_IPv6_ONLY = 5,

  MHD_FEATURE_POLL = 6,

  MHD_FEATURE_EPOLL = 7,

  MHD_FEATURE_SHUTDOWN_LISTEN_SOCKET = 8,

  MHD_FEATURE_SOCKETPAIR = 9,

  MHD_FEATURE_TCP_FASTOPEN = 10,

  MHD_FEATURE_BASIC_AUTH = 11,

  MHD_FEATURE_DIGEST_AUTH = 12,

  MHD_FEATURE_POSTPROCESSOR = 13,

  MHD_FEATURE_HTTPS_KEY_PASSWORD = 14,

  MHD_FEATURE_LARGE_FILE = 15,

  MHD_FEATURE_THREAD_NAMES = 16,
  MHD_THREAD_NAMES = 16,

  MHD_FEATURE_UPGRADE = 17,

  MHD_FEATURE_RESPONSES_SHARED_FD = 18,

  MHD_FEATURE_AUTODETECT_BIND_PORT = 19,

  MHD_FEATURE_AUTOSUPPRESS_SIGPIPE = 20,

  MHD_FEATURE_SENDFILE = 21,

  MHD_FEATURE_THREADS = 22,

  MHD_FEATURE_HTTPS_CERT_CALLBACK2 = 23,

  MHD_FEATURE_HTTPS_COOKIE_PARSING = 24,

  MHD_FEATURE_DIGEST_AUTH_RFC2069 = 25,

  MHD_FEATURE_DIGEST_AUTH_MD5 = 26,

  MHD_FEATURE_DIGEST_AUTH_SHA256 = 27,

  MHD_FEATURE_DIGEST_AUTH_SHA512_256 = 28,

  MHD_FEATURE_DIGEST_AUTH_AUTH_INT = 29,

  MHD_FEATURE_DIGEST_AUTH_ALGO_SESSION = 30,

  MHD_FEATURE_DIGEST_AUTH_USERHASH = 31,

  MHD_FEATURE_EXTERN_HASH = 32,

  MHD_FEATURE_DEBUG_BUILD = 33,

  MHD_FEATURE_FLEXIBLE_FD_SETSIZE = 34
};


_MHD_EXTERN enum MHD_Result
MHD_is_feature_supported (enum MHD_FEATURE feature);


#ifdef __cplusplus
#if 0                           /* keep Emacsens' auto-indent happy */
{
#endif
}
#endif

#endif