/* Copyright Joyent, Inc. and other Node contributors. All rights reserved. * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to * deal in the Software without restriction, including without limitation the * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or * sell copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS * IN THE SOFTWARE. */ #ifndef http_parser_h #define http_parser_h #ifdef __cplusplus extern "C" { #endif #define HTTP_PARSER_VERSION_MAJOR 1 #define HTTP_PARSER_VERSION_MINOR 0 #include #if defined(_WIN32) && !defined(__MINGW32__) && (!defined(_MSC_VER) || _MSC_VER<1600) typedef __int8 int8_t; typedef unsigned __int8 uint8_t; typedef __int16 int16_t; typedef unsigned __int16 uint16_t; typedef __int32 int32_t; typedef unsigned __int32 uint32_t; typedef __int64 int64_t; typedef unsigned __int64 uint64_t; typedef unsigned int size_t; typedef int ssize_t; #else #include #endif /* Compile with -DHTTP_PARSER_STRICT=0 to make less checks, but run * faster */ #ifndef HTTP_PARSER_STRICT # define HTTP_PARSER_STRICT 1 #endif /* Compile with -DHTTP_PARSER_DEBUG=1 to add extra debugging information to * the error reporting facility. */ #ifndef HTTP_PARSER_DEBUG # define HTTP_PARSER_DEBUG 0 #endif /* Maximium header size allowed */ #define HTTP_MAX_HEADER_SIZE (80*1024) typedef struct http_parser http_parser; typedef struct http_parser_settings http_parser_settings; typedef struct http_parser_result http_parser_result; /* Callbacks should return non-zero to indicate an error. The parser will * then halt execution. * * The one exception is on_headers_complete. In a HTTP_RESPONSE parser * returning '1' from on_headers_complete will tell the parser that it * should not expect a body. This is used when receiving a response to a * HEAD request which may contain 'Content-Length' or 'Transfer-Encoding: * chunked' headers that indicate the presence of a body. * * http_data_cb does not return data chunks. It will be call arbitrarally * many times for each string. E.G. you might get 10 callbacks for "on_path" * each providing just a few characters more data. */ typedef int (*http_data_cb) (http_parser*, const char *at, size_t length); typedef int (*http_cb) (http_parser*); /* Request Methods */ enum http_method { HTTP_DELETE = 0 , HTTP_GET , HTTP_HEAD , HTTP_POST , HTTP_PUT /* pathological */ , HTTP_CONNECT , HTTP_OPTIONS , HTTP_TRACE /* webdav */ , HTTP_COPY , HTTP_LOCK , HTTP_MKCOL , HTTP_MOVE , HTTP_PROPFIND , HTTP_PROPPATCH , HTTP_UNLOCK /* subversion */ , HTTP_REPORT , HTTP_MKACTIVITY , HTTP_CHECKOUT , HTTP_MERGE /* upnp */ , HTTP_MSEARCH , HTTP_NOTIFY , HTTP_SUBSCRIBE , HTTP_UNSUBSCRIBE /* RFC-5789 */ , HTTP_PATCH , HTTP_PURGE }; enum http_parser_type { HTTP_REQUEST, HTTP_RESPONSE, HTTP_BOTH }; /* Flag values for http_parser.flags field */ enum flags { F_CHUNKED = 1 << 0 , F_CONNECTION_KEEP_ALIVE = 1 << 1 , F_CONNECTION_CLOSE = 1 << 2 , F_TRAILING = 1 << 3 , F_UPGRADE = 1 << 4 , F_SKIPBODY = 1 << 5 }; /* Map for errno-related constants * * The provided argument should be a macro that takes 2 arguments. */ #define HTTP_ERRNO_MAP(XX) \ /* No error */ \ XX(OK, "success") \ \ /* Callback-related errors */ \ XX(CB_message_begin, "the on_message_begin callback failed") \ XX(CB_url, "the on_url callback failed") \ XX(CB_header_field, "the on_header_field callback failed") \ XX(CB_header_value, "the on_header_value callback failed") \ XX(CB_headers_complete, "the on_headers_complete callback failed") \ XX(CB_body, "the on_body callback failed") \ XX(CB_message_complete, "the on_message_complete callback failed") \ \ /* Parsing-related errors */ \ XX(INVALID_EOF_STATE, "stream ended at an unexpected time") \ XX(HEADER_OVERFLOW, \ "too many header bytes seen; overflow detected") \ XX(CLOSED_CONNECTION, \ "data received after completed connection: close message") \ XX(INVALID_VERSION, "invalid HTTP version") \ XX(INVALID_STATUS, "invalid HTTP status code") \ XX(INVALID_METHOD, "invalid HTTP method") \ XX(INVALID_URL, "invalid URL") \ XX(INVALID_HOST, "invalid host") \ XX(INVALID_PORT, "invalid port") \ XX(INVALID_PATH, "invalid path") \ XX(INVALID_QUERY_STRING, "invalid query string") \ XX(INVALID_FRAGMENT, "invalid fragment") \ XX(LF_EXPECTED, "LF character expected") \ XX(INVALID_HEADER_TOKEN, "invalid character in header") \ XX(INVALID_CONTENT_LENGTH, \ "invalid character in content-length header") \ XX(INVALID_CHUNK_SIZE, \ "invalid character in chunk size header") \ XX(INVALID_CONSTANT, "invalid constant string") \ XX(INVALID_INTERNAL_STATE, "encountered unexpected internal state")\ XX(STRICT, "strict mode assertion failed") \ XX(PAUSED, "parser is paused") \ XX(UNKNOWN, "an unknown error occurred") /* Define HPE_* values for each errno value above */ #define HTTP_ERRNO_GEN(n, s) HPE_##n, enum http_errno { HTTP_ERRNO_MAP(HTTP_ERRNO_GEN) }; #undef HTTP_ERRNO_GEN /* Get an http_errno value from an http_parser */ #define HTTP_PARSER_ERRNO(p) ((enum http_errno) (p)->http_errno) /* Get the line number that generated the current error */ #if HTTP_PARSER_DEBUG #define HTTP_PARSER_ERRNO_LINE(p) ((p)->error_lineno) #else #define HTTP_PARSER_ERRNO_LINE(p) 0 #endif struct http_parser { /** PRIVATE **/ unsigned char type : 2; /* enum http_parser_type */ unsigned char flags : 6; /* F_* values from 'flags' enum; semi-public */ unsigned char state; /* enum state from http_parser.c */ unsigned char header_state; /* enum header_state from http_parser.c */ unsigned char index; /* index into current matcher */ uint32_t nread; /* # bytes read in various scenarios */ uint64_t content_length; /* # bytes in body (0 if no Content-Length header) */ /** READ-ONLY **/ unsigned short http_major; unsigned short http_minor; unsigned short status_code; /* responses only */ unsigned char method; /* requests only */ unsigned char http_errno : 7; /* 1 = Upgrade header was present and the parser has exited because of that. * 0 = No upgrade header present. * Should be checked when http_parser_execute() returns in addition to * error checking. */ unsigned char upgrade : 1; #if HTTP_PARSER_DEBUG uint32_t error_lineno; #endif /** PUBLIC **/ void *data; /* A pointer to get hook to the "connection" or "socket" object */ }; struct http_parser_settings { http_cb on_message_begin; http_data_cb on_url; http_data_cb on_header_field; http_data_cb on_header_value; http_cb on_headers_complete; http_data_cb on_body; http_cb on_message_complete; }; enum http_parser_url_fields { UF_SCHEMA = 0 , UF_HOST = 1 , UF_PORT = 2 , UF_PATH = 3 , UF_QUERY = 4 , UF_FRAGMENT = 5 , UF_MAX = 6 }; /* Result structure for http_parser_parse_url(). * * Callers should index into field_data[] with UF_* values iff field_set * has the relevant (1 << UF_*) bit set. As a courtesy to clients (and * because we probably have padding left over), we convert any port to * a uint16_t. */ struct http_parser_url { uint16_t field_set; /* Bitmask of (1 << UF_*) values */ uint16_t port; /* Converted UF_PORT string */ struct { uint16_t off; /* Offset into buffer in which field starts */ uint16_t len; /* Length of run in buffer */ } field_data[UF_MAX]; }; void http_parser_init(http_parser *parser, enum http_parser_type type); size_t http_parser_execute(http_parser *parser, const http_parser_settings *settings, const char *data, size_t len); /* If http_should_keep_alive() in the on_headers_complete or * on_message_complete callback returns true, then this will be should be * the last message on the connection. * If you are the server, respond with the "Connection: close" header. * If you are the client, close the connection. */ int http_should_keep_alive(http_parser *parser); /* Returns a string version of the HTTP method. */ const char *http_method_str(enum http_method m); /* Return a string name of the given error */ const char *http_errno_name(enum http_errno err); /* Return a string description of the given error */ const char *http_errno_description(enum http_errno err); /* Parse a URL; return nonzero on failure */ int http_parser_parse_url(const char *buf, size_t buflen, int is_connect, struct http_parser_url *u); /* Pause or un-pause the parser; a nonzero value pauses */ void http_parser_pause(http_parser *parser, int paused); #ifdef __cplusplus } #endif #endif