363 lines
14 KiB
C
363 lines
14 KiB
C
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/* Copyright Joyent, Inc. and other Node contributors. All rights reserved.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to
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* deal in the Software without restriction, including without limitation the
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* rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
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* sell copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
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* IN THE SOFTWARE.
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*/
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#ifndef http_parser_h
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#define http_parser_h
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#ifdef __cplusplus
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extern "C" {
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#endif
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/* Also update SONAME in the Makefile whenever you change these. */
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#define HTTP_PARSER_VERSION_MAJOR 2
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#define HTTP_PARSER_VERSION_MINOR 7
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#define HTTP_PARSER_VERSION_PATCH 0
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#include <sys/types.h>
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#if defined(_WIN32) && !defined(__MINGW32__) && \
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(!defined(_MSC_VER) || _MSC_VER<1600) && !defined(__WINE__)
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#include <BaseTsd.h>
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#include <stddef.h>
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typedef __int8 int8_t;
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typedef unsigned __int8 uint8_t;
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typedef __int16 int16_t;
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typedef unsigned __int16 uint16_t;
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typedef __int32 int32_t;
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typedef unsigned __int32 uint32_t;
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typedef __int64 int64_t;
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typedef unsigned __int64 uint64_t;
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#else
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#include <stdint.h>
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#endif
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/* Compile with -DHTTP_PARSER_STRICT=0 to make less checks, but run
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* faster
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*/
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#ifndef HTTP_PARSER_STRICT
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# define HTTP_PARSER_STRICT 1
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#endif
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/* Maximium header size allowed. If the macro is not defined
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* before including this header then the default is used. To
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* change the maximum header size, define the macro in the build
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* environment (e.g. -DHTTP_MAX_HEADER_SIZE=<value>). To remove
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* the effective limit on the size of the header, define the macro
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* to a very large number (e.g. -DHTTP_MAX_HEADER_SIZE=0x7fffffff)
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*/
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#ifndef HTTP_MAX_HEADER_SIZE
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# define HTTP_MAX_HEADER_SIZE (80*1024)
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#endif
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typedef struct http_parser http_parser;
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typedef struct http_parser_settings http_parser_settings;
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/* Callbacks should return non-zero to indicate an error. The parser will
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* then halt execution.
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*
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* The one exception is on_headers_complete. In a HTTP_RESPONSE parser
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* returning '1' from on_headers_complete will tell the parser that it
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* should not expect a body. This is used when receiving a response to a
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* HEAD request which may contain 'Content-Length' or 'Transfer-Encoding:
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* chunked' headers that indicate the presence of a body.
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*
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* Returning `2` from on_headers_complete will tell parser that it should not
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* expect neither a body nor any futher responses on this connection. This is
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* useful for handling responses to a CONNECT request which may not contain
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* `Upgrade` or `Connection: upgrade` headers.
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*
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* http_data_cb does not return data chunks. It will be called arbitrarily
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* many times for each string. E.G. you might get 10 callbacks for "on_url"
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* each providing just a few characters more data.
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*/
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typedef int (*http_data_cb) (http_parser*, const char *at, size_t length);
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typedef int (*http_cb) (http_parser*);
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/* Request Methods */
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#define HTTP_METHOD_MAP(XX) \
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XX(0, DELETE, DELETE) \
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XX(1, GET, GET) \
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XX(2, HEAD, HEAD) \
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XX(3, POST, POST) \
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XX(4, PUT, PUT) \
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/* pathological */ \
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XX(5, CONNECT, CONNECT) \
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XX(6, OPTIONS, OPTIONS) \
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XX(7, TRACE, TRACE) \
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/* WebDAV */ \
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XX(8, COPY, COPY) \
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XX(9, LOCK, LOCK) \
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XX(10, MKCOL, MKCOL) \
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XX(11, MOVE, MOVE) \
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XX(12, PROPFIND, PROPFIND) \
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XX(13, PROPPATCH, PROPPATCH) \
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XX(14, SEARCH, SEARCH) \
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XX(15, UNLOCK, UNLOCK) \
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XX(16, BIND, BIND) \
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XX(17, REBIND, REBIND) \
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XX(18, UNBIND, UNBIND) \
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XX(19, ACL, ACL) \
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/* subversion */ \
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XX(20, REPORT, REPORT) \
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XX(21, MKACTIVITY, MKACTIVITY) \
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XX(22, CHECKOUT, CHECKOUT) \
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XX(23, MERGE, MERGE) \
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/* upnp */ \
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XX(24, MSEARCH, M-SEARCH) \
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XX(25, NOTIFY, NOTIFY) \
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XX(26, SUBSCRIBE, SUBSCRIBE) \
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XX(27, UNSUBSCRIBE, UNSUBSCRIBE) \
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/* RFC-5789 */ \
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XX(28, PATCH, PATCH) \
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XX(29, PURGE, PURGE) \
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/* CalDAV */ \
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XX(30, MKCALENDAR, MKCALENDAR) \
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/* RFC-2068, section 19.6.1.2 */ \
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XX(31, LINK, LINK) \
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XX(32, UNLINK, UNLINK) \
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enum http_method
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{
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#define XX(num, name, string) HTTP_##name = num,
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HTTP_METHOD_MAP(XX)
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#undef XX
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};
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enum http_parser_type { HTTP_REQUEST, HTTP_RESPONSE, HTTP_BOTH };
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/* Flag values for http_parser.flags field */
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enum flags
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{ F_CHUNKED = 1 << 0
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, F_CONNECTION_KEEP_ALIVE = 1 << 1
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, F_CONNECTION_CLOSE = 1 << 2
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, F_CONNECTION_UPGRADE = 1 << 3
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, F_TRAILING = 1 << 4
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, F_UPGRADE = 1 << 5
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, F_SKIPBODY = 1 << 6
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, F_CONTENTLENGTH = 1 << 7
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};
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/* Map for errno-related constants
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*
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* The provided argument should be a macro that takes 2 arguments.
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*/
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#define HTTP_ERRNO_MAP(XX) \
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/* No error */ \
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XX(OK, "success") \
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\
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/* Callback-related errors */ \
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XX(CB_message_begin, "the on_message_begin callback failed") \
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XX(CB_url, "the on_url callback failed") \
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XX(CB_header_field, "the on_header_field callback failed") \
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XX(CB_header_value, "the on_header_value callback failed") \
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XX(CB_headers_complete, "the on_headers_complete callback failed") \
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XX(CB_body, "the on_body callback failed") \
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XX(CB_message_complete, "the on_message_complete callback failed") \
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XX(CB_status, "the on_status callback failed") \
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XX(CB_chunk_header, "the on_chunk_header callback failed") \
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XX(CB_chunk_complete, "the on_chunk_complete callback failed") \
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\
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/* Parsing-related errors */ \
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XX(INVALID_EOF_STATE, "stream ended at an unexpected time") \
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XX(HEADER_OVERFLOW, \
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"too many header bytes seen; overflow detected") \
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XX(CLOSED_CONNECTION, \
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"data received after completed connection: close message") \
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XX(INVALID_VERSION, "invalid HTTP version") \
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XX(INVALID_STATUS, "invalid HTTP status code") \
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XX(INVALID_METHOD, "invalid HTTP method") \
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XX(INVALID_URL, "invalid URL") \
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XX(INVALID_HOST, "invalid host") \
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XX(INVALID_PORT, "invalid port") \
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XX(INVALID_PATH, "invalid path") \
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XX(INVALID_QUERY_STRING, "invalid query string") \
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XX(INVALID_FRAGMENT, "invalid fragment") \
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XX(LF_EXPECTED, "LF character expected") \
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XX(INVALID_HEADER_TOKEN, "invalid character in header") \
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XX(INVALID_CONTENT_LENGTH, \
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"invalid character in content-length header") \
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XX(UNEXPECTED_CONTENT_LENGTH, \
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"unexpected content-length header") \
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XX(INVALID_CHUNK_SIZE, \
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"invalid character in chunk size header") \
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XX(INVALID_CONSTANT, "invalid constant string") \
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XX(INVALID_INTERNAL_STATE, "encountered unexpected internal state")\
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XX(STRICT, "strict mode assertion failed") \
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XX(PAUSED, "parser is paused") \
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XX(UNKNOWN, "an unknown error occurred")
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/* Define HPE_* values for each errno value above */
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#define HTTP_ERRNO_GEN(n, s) HPE_##n,
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enum http_errno {
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HTTP_ERRNO_MAP(HTTP_ERRNO_GEN)
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};
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#undef HTTP_ERRNO_GEN
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/* Get an http_errno value from an http_parser */
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#define HTTP_PARSER_ERRNO(p) ((enum http_errno) (p)->http_errno)
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struct http_parser {
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/** PRIVATE **/
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unsigned int type : 2; /* enum http_parser_type */
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unsigned int flags : 8; /* F_* values from 'flags' enum; semi-public */
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unsigned int state : 7; /* enum state from http_parser.c */
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unsigned int header_state : 7; /* enum header_state from http_parser.c */
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unsigned int index : 7; /* index into current matcher */
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unsigned int lenient_http_headers : 1;
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uint32_t nread; /* # bytes read in various scenarios */
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uint64_t content_length; /* # bytes in body (0 if no Content-Length header) */
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/** READ-ONLY **/
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unsigned short http_major;
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unsigned short http_minor;
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unsigned int status_code : 16; /* responses only */
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unsigned int method : 8; /* requests only */
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unsigned int http_errno : 7;
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/* 1 = Upgrade header was present and the parser has exited because of that.
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* 0 = No upgrade header present.
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* Should be checked when http_parser_execute() returns in addition to
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* error checking.
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*/
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unsigned int upgrade : 1;
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/** PUBLIC **/
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void *data; /* A pointer to get hook to the "connection" or "socket" object */
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};
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struct http_parser_settings {
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http_cb on_message_begin;
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http_data_cb on_url;
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http_data_cb on_status;
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http_data_cb on_header_field;
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http_data_cb on_header_value;
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http_cb on_headers_complete;
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http_data_cb on_body;
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http_cb on_message_complete;
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/* When on_chunk_header is called, the current chunk length is stored
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* in parser->content_length.
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*/
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http_cb on_chunk_header;
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http_cb on_chunk_complete;
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};
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enum http_parser_url_fields
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{ UF_SCHEMA = 0
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, UF_HOST = 1
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, UF_PORT = 2
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, UF_PATH = 3
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, UF_QUERY = 4
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, UF_FRAGMENT = 5
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, UF_USERINFO = 6
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, UF_MAX = 7
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};
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/* Result structure for http_parser_parse_url().
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*
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* Callers should index into field_data[] with UF_* values iff field_set
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* has the relevant (1 << UF_*) bit set. As a courtesy to clients (and
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* because we probably have padding left over), we convert any port to
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* a uint16_t.
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*/
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struct http_parser_url {
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uint16_t field_set; /* Bitmask of (1 << UF_*) values */
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uint16_t port; /* Converted UF_PORT string */
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struct {
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uint16_t off; /* Offset into buffer in which field starts */
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uint16_t len; /* Length of run in buffer */
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} field_data[UF_MAX];
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};
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/* Returns the library version. Bits 16-23 contain the major version number,
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* bits 8-15 the minor version number and bits 0-7 the patch level.
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* Usage example:
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*
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* unsigned long version = http_parser_version();
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* unsigned major = (version >> 16) & 255;
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* unsigned minor = (version >> 8) & 255;
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* unsigned patch = version & 255;
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* printf("http_parser v%u.%u.%u\n", major, minor, patch);
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*/
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unsigned long http_parser_version(void);
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void http_parser_init(http_parser *parser, enum http_parser_type type);
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/* Initialize http_parser_settings members to 0
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*/
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void http_parser_settings_init(http_parser_settings *settings);
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/* Executes the parser. Returns number of parsed bytes. Sets
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* `parser->http_errno` on error. */
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size_t http_parser_execute(http_parser *parser,
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const http_parser_settings *settings,
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const char *data,
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size_t len);
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/* If http_should_keep_alive() in the on_headers_complete or
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* on_message_complete callback returns 0, then this should be
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* the last message on the connection.
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* If you are the server, respond with the "Connection: close" header.
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* If you are the client, close the connection.
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*/
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int http_should_keep_alive(const http_parser *parser);
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/* Returns a string version of the HTTP method. */
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const char *http_method_str(enum http_method m);
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/* Return a string name of the given error */
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const char *http_errno_name(enum http_errno err);
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/* Return a string description of the given error */
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const char *http_errno_description(enum http_errno err);
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/* Initialize all http_parser_url members to 0 */
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void http_parser_url_init(struct http_parser_url *u);
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/* Parse a URL; return nonzero on failure */
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int http_parser_parse_url(const char *buf, size_t buflen,
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int is_connect,
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struct http_parser_url *u);
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/* Pause or un-pause the parser; a nonzero value pauses */
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void http_parser_pause(http_parser *parser, int paused);
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/* Checks if this is the final chunk of the body. */
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int http_body_is_final(const http_parser *parser);
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#ifdef __cplusplus
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}
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#endif
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#endif
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