diff --git a/.gitmodules b/.gitmodules index c1e5dba..a4aad53 100644 --- a/.gitmodules +++ b/.gitmodules @@ -1,3 +1,6 @@ [submodule "src/buffer"] path = src/buffer url = https://github.com/zhaojh329/buffer +[submodule "src/http-parser"] + path = src/http-parser + url = https://github.com/nodejs/http-parser.git diff --git a/README.md b/README.md index 8350e09..11b60c3 100644 --- a/README.md +++ b/README.md @@ -34,7 +34,7 @@ A Lightweight and fully asynchronous HTTP server library based on [libev] and [h # Dependencies * [libev] -* [http-parser] - Has been integrated into the source code. +* [http-parser] - A parser for HTTP messages written in C * [mbedtls] - If you choose mbedtls as your SSL backend * [wolfssl] - If you choose wolfssl as your SSL backend * [openssl] - If you choose openssl as your SSL backend diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt index 8bfbfe7..0b3cae2 100644 --- a/src/CMakeLists.txt +++ b/src/CMakeLists.txt @@ -12,7 +12,7 @@ find_package(Libev REQUIRED) include_directories(${CMAKE_CURRENT_SOURCE_DIR} ${CMAKE_CURRENT_SOURCE_DIR}/buffer ${CMAKE_CURRENT_BINARY_DIR} ${LIBEV_INCLUDE_DIR}) set(EXTRA_LIBS ${LIBEV_LIBRARY} dl m) -set(SOURCE_FILES uhttpd.c log.c connection.c buffer/buffer.c http_parser.c ssl.c) +set(SOURCE_FILES uhttpd.c log.c connection.c buffer/buffer.c http-parser/http_parser.c ssl.c) set(UHTTPD_SSL_SUPPORT_CONFIG 1) option(UHTTPD_SSL_SUPPORT "SSL support" ON) diff --git a/src/connection.h b/src/connection.h index 226dad0..2f35b55 100644 --- a/src/connection.h +++ b/src/connection.h @@ -29,7 +29,7 @@ #include #include -#include "http_parser.h" +#include "http-parser/http_parser.h" #include "buffer.h" #include "config.h" diff --git a/src/http-parser b/src/http-parser new file mode 160000 index 0000000..a0c034c --- /dev/null +++ b/src/http-parser @@ -0,0 +1 @@ +Subproject commit a0c034c0c7698c08f8dc8c8d0257305f6280c27b diff --git a/src/http_parser.c b/src/http_parser.c deleted file mode 100644 index 4896385..0000000 --- a/src/http_parser.c +++ /dev/null @@ -1,2498 +0,0 @@ -/* Copyright Joyent, Inc. and other Node contributors. - * - * 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. - */ -#include "http_parser.h" -#include -#include -#include -#include -#include - -static uint32_t max_header_size = HTTP_MAX_HEADER_SIZE; - -#ifndef ULLONG_MAX -# define ULLONG_MAX ((uint64_t) -1) /* 2^64-1 */ -#endif - -#ifndef MIN -# define MIN(a,b) ((a) < (b) ? (a) : (b)) -#endif - -#ifndef ARRAY_SIZE -# define ARRAY_SIZE(a) (sizeof(a) / sizeof((a)[0])) -#endif - -#ifndef BIT_AT -# define BIT_AT(a, i) \ - (!!((unsigned int) (a)[(unsigned int) (i) >> 3] & \ - (1 << ((unsigned int) (i) & 7)))) -#endif - -#ifndef ELEM_AT -# define ELEM_AT(a, i, v) ((unsigned int) (i) < ARRAY_SIZE(a) ? (a)[(i)] : (v)) -#endif - -#define SET_ERRNO(e) \ -do { \ - parser->nread = nread; \ - parser->http_errno = (e); \ -} while(0) - -#define CURRENT_STATE() p_state -#define UPDATE_STATE(V) p_state = (enum state) (V); -#define RETURN(V) \ -do { \ - parser->nread = nread; \ - parser->state = CURRENT_STATE(); \ - return (V); \ -} while (0); -#define REEXECUTE() \ - goto reexecute; \ - - -#ifdef __GNUC__ -# define LIKELY(X) __builtin_expect(!!(X), 1) -# define UNLIKELY(X) __builtin_expect(!!(X), 0) -#else -# define LIKELY(X) (X) -# define UNLIKELY(X) (X) -#endif - - -/* Run the notify callback FOR, returning ER if it fails */ -#define CALLBACK_NOTIFY_(FOR, ER) \ -do { \ - assert(HTTP_PARSER_ERRNO(parser) == HPE_OK); \ - \ - if (LIKELY(settings->on_##FOR)) { \ - parser->state = CURRENT_STATE(); \ - if (UNLIKELY(0 != settings->on_##FOR(parser))) { \ - SET_ERRNO(HPE_CB_##FOR); \ - } \ - UPDATE_STATE(parser->state); \ - \ - /* We either errored above or got paused; get out */ \ - if (UNLIKELY(HTTP_PARSER_ERRNO(parser) != HPE_OK)) { \ - return (ER); \ - } \ - } \ -} while (0) - -/* Run the notify callback FOR and consume the current byte */ -#define CALLBACK_NOTIFY(FOR) CALLBACK_NOTIFY_(FOR, p - data + 1) - -/* Run the notify callback FOR and don't consume the current byte */ -#define CALLBACK_NOTIFY_NOADVANCE(FOR) CALLBACK_NOTIFY_(FOR, p - data) - -/* Run data callback FOR with LEN bytes, returning ER if it fails */ -#define CALLBACK_DATA_(FOR, LEN, ER) \ -do { \ - assert(HTTP_PARSER_ERRNO(parser) == HPE_OK); \ - \ - if (FOR##_mark) { \ - if (LIKELY(settings->on_##FOR)) { \ - parser->state = CURRENT_STATE(); \ - if (UNLIKELY(0 != \ - settings->on_##FOR(parser, FOR##_mark, (LEN)))) { \ - SET_ERRNO(HPE_CB_##FOR); \ - } \ - UPDATE_STATE(parser->state); \ - \ - /* We either errored above or got paused; get out */ \ - if (UNLIKELY(HTTP_PARSER_ERRNO(parser) != HPE_OK)) { \ - return (ER); \ - } \ - } \ - FOR##_mark = NULL; \ - } \ -} while (0) - -/* Run the data callback FOR and consume the current byte */ -#define CALLBACK_DATA(FOR) \ - CALLBACK_DATA_(FOR, p - FOR##_mark, p - data + 1) - -/* Run the data callback FOR and don't consume the current byte */ -#define CALLBACK_DATA_NOADVANCE(FOR) \ - CALLBACK_DATA_(FOR, p - FOR##_mark, p - data) - -/* Set the mark FOR; non-destructive if mark is already set */ -#define MARK(FOR) \ -do { \ - if (!FOR##_mark) { \ - FOR##_mark = p; \ - } \ -} while (0) - -/* Don't allow the total size of the HTTP headers (including the status - * line) to exceed max_header_size. This check is here to protect - * embedders against denial-of-service attacks where the attacker feeds - * us a never-ending header that the embedder keeps buffering. - * - * This check is arguably the responsibility of embedders but we're doing - * it on the embedder's behalf because most won't bother and this way we - * make the web a little safer. max_header_size is still far bigger - * than any reasonable request or response so this should never affect - * day-to-day operation. - */ -#define COUNT_HEADER_SIZE(V) \ -do { \ - nread += (uint32_t)(V); \ - if (UNLIKELY(nread > max_header_size)) { \ - SET_ERRNO(HPE_HEADER_OVERFLOW); \ - goto error; \ - } \ -} while (0) - - -#define PROXY_CONNECTION "proxy-connection" -#define CONNECTION "connection" -#define CONTENT_LENGTH "content-length" -#define TRANSFER_ENCODING "transfer-encoding" -#define UPGRADE "upgrade" -#define CHUNKED "chunked" -#define KEEP_ALIVE "keep-alive" -#define CLOSE "close" - - -static const char *method_strings[] = - { -#define XX(num, name, string) #string, - HTTP_METHOD_MAP(XX) -#undef XX - }; - - -/* Tokens as defined by rfc 2616. Also lowercases them. - * token = 1* - * separators = "(" | ")" | "<" | ">" | "@" - * | "," | ";" | ":" | "\" | <"> - * | "/" | "[" | "]" | "?" | "=" - * | "{" | "}" | SP | HT - */ -static const char tokens[256] = { -/* 0 nul 1 soh 2 stx 3 etx 4 eot 5 enq 6 ack 7 bel */ - 0, 0, 0, 0, 0, 0, 0, 0, -/* 8 bs 9 ht 10 nl 11 vt 12 np 13 cr 14 so 15 si */ - 0, 0, 0, 0, 0, 0, 0, 0, -/* 16 dle 17 dc1 18 dc2 19 dc3 20 dc4 21 nak 22 syn 23 etb */ - 0, 0, 0, 0, 0, 0, 0, 0, -/* 24 can 25 em 26 sub 27 esc 28 fs 29 gs 30 rs 31 us */ - 0, 0, 0, 0, 0, 0, 0, 0, -/* 32 sp 33 ! 34 " 35 # 36 $ 37 % 38 & 39 ' */ - ' ', '!', 0, '#', '$', '%', '&', '\'', -/* 40 ( 41 ) 42 * 43 + 44 , 45 - 46 . 47 / */ - 0, 0, '*', '+', 0, '-', '.', 0, -/* 48 0 49 1 50 2 51 3 52 4 53 5 54 6 55 7 */ - '0', '1', '2', '3', '4', '5', '6', '7', -/* 56 8 57 9 58 : 59 ; 60 < 61 = 62 > 63 ? */ - '8', '9', 0, 0, 0, 0, 0, 0, -/* 64 @ 65 A 66 B 67 C 68 D 69 E 70 F 71 G */ - 0, 'a', 'b', 'c', 'd', 'e', 'f', 'g', -/* 72 H 73 I 74 J 75 K 76 L 77 M 78 N 79 O */ - 'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o', -/* 80 P 81 Q 82 R 83 S 84 T 85 U 86 V 87 W */ - 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', -/* 88 X 89 Y 90 Z 91 [ 92 \ 93 ] 94 ^ 95 _ */ - 'x', 'y', 'z', 0, 0, 0, '^', '_', -/* 96 ` 97 a 98 b 99 c 100 d 101 e 102 f 103 g */ - '`', 'a', 'b', 'c', 'd', 'e', 'f', 'g', -/* 104 h 105 i 106 j 107 k 108 l 109 m 110 n 111 o */ - 'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o', -/* 112 p 113 q 114 r 115 s 116 t 117 u 118 v 119 w */ - 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', -/* 120 x 121 y 122 z 123 { 124 | 125 } 126 ~ 127 del */ - 'x', 'y', 'z', 0, '|', 0, '~', 0 }; - - -static const int8_t unhex[256] = - {-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1 - ,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1 - ,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1 - , 0, 1, 2, 3, 4, 5, 6, 7, 8, 9,-1,-1,-1,-1,-1,-1 - ,-1,10,11,12,13,14,15,-1,-1,-1,-1,-1,-1,-1,-1,-1 - ,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1 - ,-1,10,11,12,13,14,15,-1,-1,-1,-1,-1,-1,-1,-1,-1 - ,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1 - }; - - -#if HTTP_PARSER_STRICT -# define T(v) 0 -#else -# define T(v) v -#endif - - -static const uint8_t normal_url_char[32] = { -/* 0 nul 1 soh 2 stx 3 etx 4 eot 5 enq 6 ack 7 bel */ - 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0, -/* 8 bs 9 ht 10 nl 11 vt 12 np 13 cr 14 so 15 si */ - 0 | T(2) | 0 | 0 | T(16) | 0 | 0 | 0, -/* 16 dle 17 dc1 18 dc2 19 dc3 20 dc4 21 nak 22 syn 23 etb */ - 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0, -/* 24 can 25 em 26 sub 27 esc 28 fs 29 gs 30 rs 31 us */ - 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0, -/* 32 sp 33 ! 34 " 35 # 36 $ 37 % 38 & 39 ' */ - 0 | 2 | 4 | 0 | 16 | 32 | 64 | 128, -/* 40 ( 41 ) 42 * 43 + 44 , 45 - 46 . 47 / */ - 1 | 2 | 4 | 8 | 16 | 32 | 64 | 128, -/* 48 0 49 1 50 2 51 3 52 4 53 5 54 6 55 7 */ - 1 | 2 | 4 | 8 | 16 | 32 | 64 | 128, -/* 56 8 57 9 58 : 59 ; 60 < 61 = 62 > 63 ? */ - 1 | 2 | 4 | 8 | 16 | 32 | 64 | 0, -/* 64 @ 65 A 66 B 67 C 68 D 69 E 70 F 71 G */ - 1 | 2 | 4 | 8 | 16 | 32 | 64 | 128, -/* 72 H 73 I 74 J 75 K 76 L 77 M 78 N 79 O */ - 1 | 2 | 4 | 8 | 16 | 32 | 64 | 128, -/* 80 P 81 Q 82 R 83 S 84 T 85 U 86 V 87 W */ - 1 | 2 | 4 | 8 | 16 | 32 | 64 | 128, -/* 88 X 89 Y 90 Z 91 [ 92 \ 93 ] 94 ^ 95 _ */ - 1 | 2 | 4 | 8 | 16 | 32 | 64 | 128, -/* 96 ` 97 a 98 b 99 c 100 d 101 e 102 f 103 g */ - 1 | 2 | 4 | 8 | 16 | 32 | 64 | 128, -/* 104 h 105 i 106 j 107 k 108 l 109 m 110 n 111 o */ - 1 | 2 | 4 | 8 | 16 | 32 | 64 | 128, -/* 112 p 113 q 114 r 115 s 116 t 117 u 118 v 119 w */ - 1 | 2 | 4 | 8 | 16 | 32 | 64 | 128, -/* 120 x 121 y 122 z 123 { 124 | 125 } 126 ~ 127 del */ - 1 | 2 | 4 | 8 | 16 | 32 | 64 | 0, }; - -#undef T - -enum state - { s_dead = 1 /* important that this is > 0 */ - - , s_start_req_or_res - , s_res_or_resp_H - , s_start_res - , s_res_H - , s_res_HT - , s_res_HTT - , s_res_HTTP - , s_res_http_major - , s_res_http_dot - , s_res_http_minor - , s_res_http_end - , s_res_first_status_code - , s_res_status_code - , s_res_status_start - , s_res_status - , s_res_line_almost_done - - , s_start_req - - , s_req_method - , s_req_spaces_before_url - , s_req_schema - , s_req_schema_slash - , s_req_schema_slash_slash - , s_req_server_start - , s_req_server - , s_req_server_with_at - , s_req_path - , s_req_query_string_start - , s_req_query_string - , s_req_fragment_start - , s_req_fragment - , s_req_http_start - , s_req_http_H - , s_req_http_HT - , s_req_http_HTT - , s_req_http_HTTP - , s_req_http_I - , s_req_http_IC - , s_req_http_major - , s_req_http_dot - , s_req_http_minor - , s_req_http_end - , s_req_line_almost_done - - , s_header_field_start - , s_header_field - , s_header_value_discard_ws - , s_header_value_discard_ws_almost_done - , s_header_value_discard_lws - , s_header_value_start - , s_header_value - , s_header_value_lws - - , s_header_almost_done - - , s_chunk_size_start - , s_chunk_size - , s_chunk_parameters - , s_chunk_size_almost_done - - , s_headers_almost_done - , s_headers_done - - /* Important: 's_headers_done' must be the last 'header' state. All - * states beyond this must be 'body' states. It is used for overflow - * checking. See the PARSING_HEADER() macro. - */ - - , s_chunk_data - , s_chunk_data_almost_done - , s_chunk_data_done - - , s_body_identity - , s_body_identity_eof - - , s_message_done - }; - - -#define PARSING_HEADER(state) (state <= s_headers_done) - - -enum header_states - { h_general = 0 - , h_C - , h_CO - , h_CON - - , h_matching_connection - , h_matching_proxy_connection - , h_matching_content_length - , h_matching_transfer_encoding - , h_matching_upgrade - - , h_connection - , h_content_length - , h_content_length_num - , h_content_length_ws - , h_transfer_encoding - , h_upgrade - - , h_matching_transfer_encoding_chunked - , h_matching_connection_token_start - , h_matching_connection_keep_alive - , h_matching_connection_close - , h_matching_connection_upgrade - , h_matching_connection_token - - , h_transfer_encoding_chunked - , h_connection_keep_alive - , h_connection_close - , h_connection_upgrade - }; - -enum http_host_state - { - s_http_host_dead = 1 - , s_http_userinfo_start - , s_http_userinfo - , s_http_host_start - , s_http_host_v6_start - , s_http_host - , s_http_host_v6 - , s_http_host_v6_end - , s_http_host_v6_zone_start - , s_http_host_v6_zone - , s_http_host_port_start - , s_http_host_port -}; - -/* Macros for character classes; depends on strict-mode */ -#define CR '\r' -#define LF '\n' -#define LOWER(c) (unsigned char)(c | 0x20) -#define IS_ALPHA(c) (LOWER(c) >= 'a' && LOWER(c) <= 'z') -#define IS_NUM(c) ((c) >= '0' && (c) <= '9') -#define IS_ALPHANUM(c) (IS_ALPHA(c) || IS_NUM(c)) -#define IS_HEX(c) (IS_NUM(c) || (LOWER(c) >= 'a' && LOWER(c) <= 'f')) -#define IS_MARK(c) ((c) == '-' || (c) == '_' || (c) == '.' || \ - (c) == '!' || (c) == '~' || (c) == '*' || (c) == '\'' || (c) == '(' || \ - (c) == ')') -#define IS_USERINFO_CHAR(c) (IS_ALPHANUM(c) || IS_MARK(c) || (c) == '%' || \ - (c) == ';' || (c) == ':' || (c) == '&' || (c) == '=' || (c) == '+' || \ - (c) == '$' || (c) == ',') - -#define STRICT_TOKEN(c) ((c == ' ') ? 0 : tokens[(unsigned char)c]) - -#if HTTP_PARSER_STRICT -#define TOKEN(c) STRICT_TOKEN(c) -#define IS_URL_CHAR(c) (BIT_AT(normal_url_char, (unsigned char)c)) -#define IS_HOST_CHAR(c) (IS_ALPHANUM(c) || (c) == '.' || (c) == '-') -#else -#define TOKEN(c) tokens[(unsigned char)c] -#define IS_URL_CHAR(c) \ - (BIT_AT(normal_url_char, (unsigned char)c) || ((c) & 0x80)) -#define IS_HOST_CHAR(c) \ - (IS_ALPHANUM(c) || (c) == '.' || (c) == '-' || (c) == '_') -#endif - -/** - * Verify that a char is a valid visible (printable) US-ASCII - * character or %x80-FF - **/ -#define IS_HEADER_CHAR(ch) \ - (ch == CR || ch == LF || ch == 9 || ((unsigned char)ch > 31 && ch != 127)) - -#define start_state (parser->type == HTTP_REQUEST ? s_start_req : s_start_res) - - -#if HTTP_PARSER_STRICT -# define STRICT_CHECK(cond) \ -do { \ - if (cond) { \ - SET_ERRNO(HPE_STRICT); \ - goto error; \ - } \ -} while (0) -# define NEW_MESSAGE() (http_should_keep_alive(parser) ? start_state : s_dead) -#else -# define STRICT_CHECK(cond) -# define NEW_MESSAGE() start_state -#endif - - -/* Map errno values to strings for human-readable output */ -#define HTTP_STRERROR_GEN(n, s) { "HPE_" #n, s }, -static struct { - const char *name; - const char *description; -} http_strerror_tab[] = { - HTTP_ERRNO_MAP(HTTP_STRERROR_GEN) -}; -#undef HTTP_STRERROR_GEN - -int http_message_needs_eof(const http_parser *parser); - -/* Our URL parser. - * - * This is designed to be shared by http_parser_execute() for URL validation, - * hence it has a state transition + byte-for-byte interface. In addition, it - * is meant to be embedded in http_parser_parse_url(), which does the dirty - * work of turning state transitions URL components for its API. - * - * This function should only be invoked with non-space characters. It is - * assumed that the caller cares about (and can detect) the transition between - * URL and non-URL states by looking for these. - */ -static enum state -parse_url_char(enum state s, const char ch) -{ - if (ch == ' ' || ch == '\r' || ch == '\n') { - return s_dead; - } - -#if HTTP_PARSER_STRICT - if (ch == '\t' || ch == '\f') { - return s_dead; - } -#endif - - switch (s) { - case s_req_spaces_before_url: - /* Proxied requests are followed by scheme of an absolute URI (alpha). - * All methods except CONNECT are followed by '/' or '*'. - */ - - if (ch == '/' || ch == '*') { - return s_req_path; - } - - if (IS_ALPHA(ch)) { - return s_req_schema; - } - - break; - - case s_req_schema: - if (IS_ALPHA(ch)) { - return s; - } - - if (ch == ':') { - return s_req_schema_slash; - } - - break; - - case s_req_schema_slash: - if (ch == '/') { - return s_req_schema_slash_slash; - } - - break; - - case s_req_schema_slash_slash: - if (ch == '/') { - return s_req_server_start; - } - - break; - - case s_req_server_with_at: - if (ch == '@') { - return s_dead; - } - - /* fall through */ - case s_req_server_start: - case s_req_server: - if (ch == '/') { - return s_req_path; - } - - if (ch == '?') { - return s_req_query_string_start; - } - - if (ch == '@') { - return s_req_server_with_at; - } - - if (IS_USERINFO_CHAR(ch) || ch == '[' || ch == ']') { - return s_req_server; - } - - break; - - case s_req_path: - if (IS_URL_CHAR(ch)) { - return s; - } - - switch (ch) { - case '?': - return s_req_query_string_start; - - case '#': - return s_req_fragment_start; - } - - break; - - case s_req_query_string_start: - case s_req_query_string: - if (IS_URL_CHAR(ch)) { - return s_req_query_string; - } - - switch (ch) { - case '?': - /* allow extra '?' in query string */ - return s_req_query_string; - - case '#': - return s_req_fragment_start; - } - - break; - - case s_req_fragment_start: - if (IS_URL_CHAR(ch)) { - return s_req_fragment; - } - - switch (ch) { - case '?': - return s_req_fragment; - - case '#': - return s; - } - - break; - - case s_req_fragment: - if (IS_URL_CHAR(ch)) { - return s; - } - - switch (ch) { - case '?': - case '#': - return s; - } - - break; - - default: - break; - } - - /* We should never fall out of the switch above unless there's an error */ - return s_dead; -} - -size_t http_parser_execute (http_parser *parser, - const http_parser_settings *settings, - const char *data, - size_t len) -{ - char c, ch; - int8_t unhex_val; - const char *p = data; - const char *header_field_mark = 0; - const char *header_value_mark = 0; - const char *url_mark = 0; - const char *body_mark = 0; - const char *status_mark = 0; - enum state p_state = (enum state) parser->state; - const unsigned int lenient = parser->lenient_http_headers; - uint32_t nread = parser->nread; - - /* We're in an error state. Don't bother doing anything. */ - if (HTTP_PARSER_ERRNO(parser) != HPE_OK) { - return 0; - } - - if (len == 0) { - switch (CURRENT_STATE()) { - case s_body_identity_eof: - /* Use of CALLBACK_NOTIFY() here would erroneously return 1 byte read if - * we got paused. - */ - CALLBACK_NOTIFY_NOADVANCE(message_complete); - return 0; - - case s_dead: - case s_start_req_or_res: - case s_start_res: - case s_start_req: - return 0; - - default: - SET_ERRNO(HPE_INVALID_EOF_STATE); - return 1; - } - } - - - if (CURRENT_STATE() == s_header_field) - header_field_mark = data; - if (CURRENT_STATE() == s_header_value) - header_value_mark = data; - switch (CURRENT_STATE()) { - case s_req_path: - case s_req_schema: - case s_req_schema_slash: - case s_req_schema_slash_slash: - case s_req_server_start: - case s_req_server: - case s_req_server_with_at: - case s_req_query_string_start: - case s_req_query_string: - case s_req_fragment_start: - case s_req_fragment: - url_mark = data; - break; - case s_res_status: - status_mark = data; - break; - default: - break; - } - - for (p=data; p != data + len; p++) { - ch = *p; - - if (PARSING_HEADER(CURRENT_STATE())) - COUNT_HEADER_SIZE(1); - -reexecute: - switch (CURRENT_STATE()) { - - case s_dead: - /* this state is used after a 'Connection: close' message - * the parser will error out if it reads another message - */ - if (LIKELY(ch == CR || ch == LF)) - break; - - SET_ERRNO(HPE_CLOSED_CONNECTION); - goto error; - - case s_start_req_or_res: - { - if (ch == CR || ch == LF) - break; - parser->flags = 0; - parser->content_length = ULLONG_MAX; - - if (ch == 'H') { - UPDATE_STATE(s_res_or_resp_H); - - CALLBACK_NOTIFY(message_begin); - } else { - parser->type = HTTP_REQUEST; - UPDATE_STATE(s_start_req); - REEXECUTE(); - } - - break; - } - - case s_res_or_resp_H: - if (ch == 'T') { - parser->type = HTTP_RESPONSE; - UPDATE_STATE(s_res_HT); - } else { - if (UNLIKELY(ch != 'E')) { - SET_ERRNO(HPE_INVALID_CONSTANT); - goto error; - } - - parser->type = HTTP_REQUEST; - parser->method = HTTP_HEAD; - parser->index = 2; - UPDATE_STATE(s_req_method); - } - break; - - case s_start_res: - { - if (ch == CR || ch == LF) - break; - parser->flags = 0; - parser->content_length = ULLONG_MAX; - - if (ch == 'H') { - UPDATE_STATE(s_res_H); - } else { - SET_ERRNO(HPE_INVALID_CONSTANT); - goto error; - } - - CALLBACK_NOTIFY(message_begin); - break; - } - - case s_res_H: - STRICT_CHECK(ch != 'T'); - UPDATE_STATE(s_res_HT); - break; - - case s_res_HT: - STRICT_CHECK(ch != 'T'); - UPDATE_STATE(s_res_HTT); - break; - - case s_res_HTT: - STRICT_CHECK(ch != 'P'); - UPDATE_STATE(s_res_HTTP); - break; - - case s_res_HTTP: - STRICT_CHECK(ch != '/'); - UPDATE_STATE(s_res_http_major); - break; - - case s_res_http_major: - if (UNLIKELY(!IS_NUM(ch))) { - SET_ERRNO(HPE_INVALID_VERSION); - goto error; - } - - parser->http_major = ch - '0'; - UPDATE_STATE(s_res_http_dot); - break; - - case s_res_http_dot: - { - if (UNLIKELY(ch != '.')) { - SET_ERRNO(HPE_INVALID_VERSION); - goto error; - } - - UPDATE_STATE(s_res_http_minor); - break; - } - - case s_res_http_minor: - if (UNLIKELY(!IS_NUM(ch))) { - SET_ERRNO(HPE_INVALID_VERSION); - goto error; - } - - parser->http_minor = ch - '0'; - UPDATE_STATE(s_res_http_end); - break; - - case s_res_http_end: - { - if (UNLIKELY(ch != ' ')) { - SET_ERRNO(HPE_INVALID_VERSION); - goto error; - } - - UPDATE_STATE(s_res_first_status_code); - break; - } - - case s_res_first_status_code: - { - if (!IS_NUM(ch)) { - if (ch == ' ') { - break; - } - - SET_ERRNO(HPE_INVALID_STATUS); - goto error; - } - parser->status_code = ch - '0'; - UPDATE_STATE(s_res_status_code); - break; - } - - case s_res_status_code: - { - if (!IS_NUM(ch)) { - switch (ch) { - case ' ': - UPDATE_STATE(s_res_status_start); - break; - case CR: - case LF: - UPDATE_STATE(s_res_status_start); - REEXECUTE(); - break; - default: - SET_ERRNO(HPE_INVALID_STATUS); - goto error; - } - break; - } - - parser->status_code *= 10; - parser->status_code += ch - '0'; - - if (UNLIKELY(parser->status_code > 999)) { - SET_ERRNO(HPE_INVALID_STATUS); - goto error; - } - - break; - } - - case s_res_status_start: - { - MARK(status); - UPDATE_STATE(s_res_status); - parser->index = 0; - - if (ch == CR || ch == LF) - REEXECUTE(); - - break; - } - - case s_res_status: - if (ch == CR) { - UPDATE_STATE(s_res_line_almost_done); - CALLBACK_DATA(status); - break; - } - - if (ch == LF) { - UPDATE_STATE(s_header_field_start); - CALLBACK_DATA(status); - break; - } - - break; - - case s_res_line_almost_done: - STRICT_CHECK(ch != LF); - UPDATE_STATE(s_header_field_start); - break; - - case s_start_req: - { - if (ch == CR || ch == LF) - break; - parser->flags = 0; - parser->content_length = ULLONG_MAX; - - if (UNLIKELY(!IS_ALPHA(ch))) { - SET_ERRNO(HPE_INVALID_METHOD); - goto error; - } - - parser->method = (enum http_method) 0; - parser->index = 1; - switch (ch) { - case 'A': parser->method = HTTP_ACL; break; - case 'B': parser->method = HTTP_BIND; break; - case 'C': parser->method = HTTP_CONNECT; /* or COPY, CHECKOUT */ break; - case 'D': parser->method = HTTP_DELETE; break; - case 'G': parser->method = HTTP_GET; break; - case 'H': parser->method = HTTP_HEAD; break; - case 'L': parser->method = HTTP_LOCK; /* or LINK */ break; - case 'M': parser->method = HTTP_MKCOL; /* or MOVE, MKACTIVITY, MERGE, M-SEARCH, MKCALENDAR */ break; - case 'N': parser->method = HTTP_NOTIFY; break; - case 'O': parser->method = HTTP_OPTIONS; break; - case 'P': parser->method = HTTP_POST; - /* or PROPFIND|PROPPATCH|PUT|PATCH|PURGE */ - break; - case 'R': parser->method = HTTP_REPORT; /* or REBIND */ break; - case 'S': parser->method = HTTP_SUBSCRIBE; /* or SEARCH, SOURCE */ break; - case 'T': parser->method = HTTP_TRACE; break; - case 'U': parser->method = HTTP_UNLOCK; /* or UNSUBSCRIBE, UNBIND, UNLINK */ break; - default: - SET_ERRNO(HPE_INVALID_METHOD); - goto error; - } - UPDATE_STATE(s_req_method); - - CALLBACK_NOTIFY(message_begin); - - break; - } - - case s_req_method: - { - const char *matcher; - if (UNLIKELY(ch == '\0')) { - SET_ERRNO(HPE_INVALID_METHOD); - goto error; - } - - matcher = method_strings[parser->method]; - if (ch == ' ' && matcher[parser->index] == '\0') { - UPDATE_STATE(s_req_spaces_before_url); - } else if (ch == matcher[parser->index]) { - ; /* nada */ - } else if ((ch >= 'A' && ch <= 'Z') || ch == '-') { - - switch (parser->method << 16 | parser->index << 8 | ch) { -#define XX(meth, pos, ch, new_meth) \ - case (HTTP_##meth << 16 | pos << 8 | ch): \ - parser->method = HTTP_##new_meth; break; - - XX(POST, 1, 'U', PUT) - XX(POST, 1, 'A', PATCH) - XX(POST, 1, 'R', PROPFIND) - XX(PUT, 2, 'R', PURGE) - XX(CONNECT, 1, 'H', CHECKOUT) - XX(CONNECT, 2, 'P', COPY) - XX(MKCOL, 1, 'O', MOVE) - XX(MKCOL, 1, 'E', MERGE) - XX(MKCOL, 1, '-', MSEARCH) - XX(MKCOL, 2, 'A', MKACTIVITY) - XX(MKCOL, 3, 'A', MKCALENDAR) - XX(SUBSCRIBE, 1, 'E', SEARCH) - XX(SUBSCRIBE, 1, 'O', SOURCE) - XX(REPORT, 2, 'B', REBIND) - XX(PROPFIND, 4, 'P', PROPPATCH) - XX(LOCK, 1, 'I', LINK) - XX(UNLOCK, 2, 'S', UNSUBSCRIBE) - XX(UNLOCK, 2, 'B', UNBIND) - XX(UNLOCK, 3, 'I', UNLINK) -#undef XX - default: - SET_ERRNO(HPE_INVALID_METHOD); - goto error; - } - } else { - SET_ERRNO(HPE_INVALID_METHOD); - goto error; - } - - ++parser->index; - break; - } - - case s_req_spaces_before_url: - { - if (ch == ' ') break; - - MARK(url); - if (parser->method == HTTP_CONNECT) { - UPDATE_STATE(s_req_server_start); - } - - UPDATE_STATE(parse_url_char(CURRENT_STATE(), ch)); - if (UNLIKELY(CURRENT_STATE() == s_dead)) { - SET_ERRNO(HPE_INVALID_URL); - goto error; - } - - break; - } - - case s_req_schema: - case s_req_schema_slash: - case s_req_schema_slash_slash: - case s_req_server_start: - { - switch (ch) { - /* No whitespace allowed here */ - case ' ': - case CR: - case LF: - SET_ERRNO(HPE_INVALID_URL); - goto error; - default: - UPDATE_STATE(parse_url_char(CURRENT_STATE(), ch)); - if (UNLIKELY(CURRENT_STATE() == s_dead)) { - SET_ERRNO(HPE_INVALID_URL); - goto error; - } - } - - break; - } - - case s_req_server: - case s_req_server_with_at: - case s_req_path: - case s_req_query_string_start: - case s_req_query_string: - case s_req_fragment_start: - case s_req_fragment: - { - switch (ch) { - case ' ': - UPDATE_STATE(s_req_http_start); - CALLBACK_DATA(url); - break; - case CR: - case LF: - parser->http_major = 0; - parser->http_minor = 9; - UPDATE_STATE((ch == CR) ? - s_req_line_almost_done : - s_header_field_start); - CALLBACK_DATA(url); - break; - default: - UPDATE_STATE(parse_url_char(CURRENT_STATE(), ch)); - if (UNLIKELY(CURRENT_STATE() == s_dead)) { - SET_ERRNO(HPE_INVALID_URL); - goto error; - } - } - break; - } - - case s_req_http_start: - switch (ch) { - case ' ': - break; - case 'H': - UPDATE_STATE(s_req_http_H); - break; - case 'I': - if (parser->method == HTTP_SOURCE) { - UPDATE_STATE(s_req_http_I); - break; - } - /* fall through */ - default: - SET_ERRNO(HPE_INVALID_CONSTANT); - goto error; - } - break; - - case s_req_http_H: - STRICT_CHECK(ch != 'T'); - UPDATE_STATE(s_req_http_HT); - break; - - case s_req_http_HT: - STRICT_CHECK(ch != 'T'); - UPDATE_STATE(s_req_http_HTT); - break; - - case s_req_http_HTT: - STRICT_CHECK(ch != 'P'); - UPDATE_STATE(s_req_http_HTTP); - break; - - case s_req_http_I: - STRICT_CHECK(ch != 'C'); - UPDATE_STATE(s_req_http_IC); - break; - - case s_req_http_IC: - STRICT_CHECK(ch != 'E'); - UPDATE_STATE(s_req_http_HTTP); /* Treat "ICE" as "HTTP". */ - break; - - case s_req_http_HTTP: - STRICT_CHECK(ch != '/'); - UPDATE_STATE(s_req_http_major); - break; - - case s_req_http_major: - if (UNLIKELY(!IS_NUM(ch))) { - SET_ERRNO(HPE_INVALID_VERSION); - goto error; - } - - parser->http_major = ch - '0'; - UPDATE_STATE(s_req_http_dot); - break; - - case s_req_http_dot: - { - if (UNLIKELY(ch != '.')) { - SET_ERRNO(HPE_INVALID_VERSION); - goto error; - } - - UPDATE_STATE(s_req_http_minor); - break; - } - - case s_req_http_minor: - if (UNLIKELY(!IS_NUM(ch))) { - SET_ERRNO(HPE_INVALID_VERSION); - goto error; - } - - parser->http_minor = ch - '0'; - UPDATE_STATE(s_req_http_end); - break; - - case s_req_http_end: - { - if (ch == CR) { - UPDATE_STATE(s_req_line_almost_done); - break; - } - - if (ch == LF) { - UPDATE_STATE(s_header_field_start); - break; - } - - SET_ERRNO(HPE_INVALID_VERSION); - goto error; - break; - } - - /* end of request line */ - case s_req_line_almost_done: - { - if (UNLIKELY(ch != LF)) { - SET_ERRNO(HPE_LF_EXPECTED); - goto error; - } - - UPDATE_STATE(s_header_field_start); - break; - } - - case s_header_field_start: - { - if (ch == CR) { - UPDATE_STATE(s_headers_almost_done); - break; - } - - if (ch == LF) { - /* they might be just sending \n instead of \r\n so this would be - * the second \n to denote the end of headers*/ - UPDATE_STATE(s_headers_almost_done); - REEXECUTE(); - } - - c = TOKEN(ch); - - if (UNLIKELY(!c)) { - SET_ERRNO(HPE_INVALID_HEADER_TOKEN); - goto error; - } - - MARK(header_field); - - parser->index = 0; - UPDATE_STATE(s_header_field); - - switch (c) { - case 'c': - parser->header_state = h_C; - break; - - case 'p': - parser->header_state = h_matching_proxy_connection; - break; - - case 't': - parser->header_state = h_matching_transfer_encoding; - break; - - case 'u': - parser->header_state = h_matching_upgrade; - break; - - default: - parser->header_state = h_general; - break; - } - break; - } - - case s_header_field: - { - const char* start = p; - for (; p != data + len; p++) { - ch = *p; - c = TOKEN(ch); - - if (!c) - break; - - switch (parser->header_state) { - case h_general: { - size_t left = data + len - p; - const char* pe = p + MIN(left, max_header_size); - while (p+1 < pe && TOKEN(p[1])) { - p++; - } - break; - } - - case h_C: - parser->index++; - parser->header_state = (c == 'o' ? h_CO : h_general); - break; - - case h_CO: - parser->index++; - parser->header_state = (c == 'n' ? h_CON : h_general); - break; - - case h_CON: - parser->index++; - switch (c) { - case 'n': - parser->header_state = h_matching_connection; - break; - case 't': - parser->header_state = h_matching_content_length; - break; - default: - parser->header_state = h_general; - break; - } - break; - - /* connection */ - - case h_matching_connection: - parser->index++; - if (parser->index > sizeof(CONNECTION)-1 - || c != CONNECTION[parser->index]) { - parser->header_state = h_general; - } else if (parser->index == sizeof(CONNECTION)-2) { - parser->header_state = h_connection; - } - break; - - /* proxy-connection */ - - case h_matching_proxy_connection: - parser->index++; - if (parser->index > sizeof(PROXY_CONNECTION)-1 - || c != PROXY_CONNECTION[parser->index]) { - parser->header_state = h_general; - } else if (parser->index == sizeof(PROXY_CONNECTION)-2) { - parser->header_state = h_connection; - } - break; - - /* content-length */ - - case h_matching_content_length: - parser->index++; - if (parser->index > sizeof(CONTENT_LENGTH)-1 - || c != CONTENT_LENGTH[parser->index]) { - parser->header_state = h_general; - } else if (parser->index == sizeof(CONTENT_LENGTH)-2) { - parser->header_state = h_content_length; - } - break; - - /* transfer-encoding */ - - case h_matching_transfer_encoding: - parser->index++; - if (parser->index > sizeof(TRANSFER_ENCODING)-1 - || c != TRANSFER_ENCODING[parser->index]) { - parser->header_state = h_general; - } else if (parser->index == sizeof(TRANSFER_ENCODING)-2) { - parser->header_state = h_transfer_encoding; - } - break; - - /* upgrade */ - - case h_matching_upgrade: - parser->index++; - if (parser->index > sizeof(UPGRADE)-1 - || c != UPGRADE[parser->index]) { - parser->header_state = h_general; - } else if (parser->index == sizeof(UPGRADE)-2) { - parser->header_state = h_upgrade; - } - break; - - case h_connection: - case h_content_length: - case h_transfer_encoding: - case h_upgrade: - if (ch != ' ') parser->header_state = h_general; - break; - - default: - assert(0 && "Unknown header_state"); - break; - } - } - - if (p == data + len) { - --p; - COUNT_HEADER_SIZE(p - start); - break; - } - - COUNT_HEADER_SIZE(p - start); - - if (ch == ':') { - UPDATE_STATE(s_header_value_discard_ws); - CALLBACK_DATA(header_field); - break; - } - - SET_ERRNO(HPE_INVALID_HEADER_TOKEN); - goto error; - } - - case s_header_value_discard_ws: - if (ch == ' ' || ch == '\t') break; - - if (ch == CR) { - UPDATE_STATE(s_header_value_discard_ws_almost_done); - break; - } - - if (ch == LF) { - UPDATE_STATE(s_header_value_discard_lws); - break; - } - - /* fall through */ - - case s_header_value_start: - { - MARK(header_value); - - UPDATE_STATE(s_header_value); - parser->index = 0; - - c = LOWER(ch); - - switch (parser->header_state) { - case h_upgrade: - parser->flags |= F_UPGRADE; - parser->header_state = h_general; - break; - - case h_transfer_encoding: - /* looking for 'Transfer-Encoding: chunked' */ - if ('c' == c) { - parser->header_state = h_matching_transfer_encoding_chunked; - } else { - parser->header_state = h_general; - } - break; - - case h_content_length: - if (UNLIKELY(!IS_NUM(ch))) { - SET_ERRNO(HPE_INVALID_CONTENT_LENGTH); - goto error; - } - - if (parser->flags & F_CONTENTLENGTH) { - SET_ERRNO(HPE_UNEXPECTED_CONTENT_LENGTH); - goto error; - } - - parser->flags |= F_CONTENTLENGTH; - parser->content_length = ch - '0'; - parser->header_state = h_content_length_num; - break; - - /* when obsolete line folding is encountered for content length - * continue to the s_header_value state */ - case h_content_length_ws: - break; - - case h_connection: - /* looking for 'Connection: keep-alive' */ - if (c == 'k') { - parser->header_state = h_matching_connection_keep_alive; - /* looking for 'Connection: close' */ - } else if (c == 'c') { - parser->header_state = h_matching_connection_close; - } else if (c == 'u') { - parser->header_state = h_matching_connection_upgrade; - } else { - parser->header_state = h_matching_connection_token; - } - break; - - /* Multi-value `Connection` header */ - case h_matching_connection_token_start: - break; - - default: - parser->header_state = h_general; - break; - } - break; - } - - case s_header_value: - { - const char* start = p; - enum header_states h_state = (enum header_states) parser->header_state; - for (; p != data + len; p++) { - ch = *p; - if (ch == CR) { - UPDATE_STATE(s_header_almost_done); - parser->header_state = h_state; - CALLBACK_DATA(header_value); - break; - } - - if (ch == LF) { - UPDATE_STATE(s_header_almost_done); - COUNT_HEADER_SIZE(p - start); - parser->header_state = h_state; - CALLBACK_DATA_NOADVANCE(header_value); - REEXECUTE(); - } - - if (!lenient && !IS_HEADER_CHAR(ch)) { - SET_ERRNO(HPE_INVALID_HEADER_TOKEN); - goto error; - } - - c = LOWER(ch); - - switch (h_state) { - case h_general: - { - size_t left = data + len - p; - const char* pe = p + MIN(left, max_header_size); - - for (; p != pe; p++) { - ch = *p; - if (ch == CR || ch == LF) { - --p; - break; - } - if (!lenient && !IS_HEADER_CHAR(ch)) { - SET_ERRNO(HPE_INVALID_HEADER_TOKEN); - goto error; - } - } - if (p == data + len) - --p; - break; - } - - case h_connection: - case h_transfer_encoding: - assert(0 && "Shouldn't get here."); - break; - - case h_content_length: - if (ch == ' ') break; - h_state = h_content_length_num; - /* fall through */ - - case h_content_length_num: - { - uint64_t t; - - if (ch == ' ') { - h_state = h_content_length_ws; - break; - } - - if (UNLIKELY(!IS_NUM(ch))) { - SET_ERRNO(HPE_INVALID_CONTENT_LENGTH); - parser->header_state = h_state; - goto error; - } - - t = parser->content_length; - t *= 10; - t += ch - '0'; - - /* Overflow? Test against a conservative limit for simplicity. */ - if (UNLIKELY((ULLONG_MAX - 10) / 10 < parser->content_length)) { - SET_ERRNO(HPE_INVALID_CONTENT_LENGTH); - parser->header_state = h_state; - goto error; - } - - parser->content_length = t; - break; - } - - case h_content_length_ws: - if (ch == ' ') break; - SET_ERRNO(HPE_INVALID_CONTENT_LENGTH); - parser->header_state = h_state; - goto error; - - /* Transfer-Encoding: chunked */ - case h_matching_transfer_encoding_chunked: - parser->index++; - if (parser->index > sizeof(CHUNKED)-1 - || c != CHUNKED[parser->index]) { - h_state = h_general; - } else if (parser->index == sizeof(CHUNKED)-2) { - h_state = h_transfer_encoding_chunked; - } - break; - - case h_matching_connection_token_start: - /* looking for 'Connection: keep-alive' */ - if (c == 'k') { - h_state = h_matching_connection_keep_alive; - /* looking for 'Connection: close' */ - } else if (c == 'c') { - h_state = h_matching_connection_close; - } else if (c == 'u') { - h_state = h_matching_connection_upgrade; - } else if (STRICT_TOKEN(c)) { - h_state = h_matching_connection_token; - } else if (c == ' ' || c == '\t') { - /* Skip lws */ - } else { - h_state = h_general; - } - break; - - /* looking for 'Connection: keep-alive' */ - case h_matching_connection_keep_alive: - parser->index++; - if (parser->index > sizeof(KEEP_ALIVE)-1 - || c != KEEP_ALIVE[parser->index]) { - h_state = h_matching_connection_token; - } else if (parser->index == sizeof(KEEP_ALIVE)-2) { - h_state = h_connection_keep_alive; - } - break; - - /* looking for 'Connection: close' */ - case h_matching_connection_close: - parser->index++; - if (parser->index > sizeof(CLOSE)-1 || c != CLOSE[parser->index]) { - h_state = h_matching_connection_token; - } else if (parser->index == sizeof(CLOSE)-2) { - h_state = h_connection_close; - } - break; - - /* looking for 'Connection: upgrade' */ - case h_matching_connection_upgrade: - parser->index++; - if (parser->index > sizeof(UPGRADE) - 1 || - c != UPGRADE[parser->index]) { - h_state = h_matching_connection_token; - } else if (parser->index == sizeof(UPGRADE)-2) { - h_state = h_connection_upgrade; - } - break; - - case h_matching_connection_token: - if (ch == ',') { - h_state = h_matching_connection_token_start; - parser->index = 0; - } - break; - - case h_transfer_encoding_chunked: - if (ch != ' ') h_state = h_general; - break; - - case h_connection_keep_alive: - case h_connection_close: - case h_connection_upgrade: - if (ch == ',') { - if (h_state == h_connection_keep_alive) { - parser->flags |= F_CONNECTION_KEEP_ALIVE; - } else if (h_state == h_connection_close) { - parser->flags |= F_CONNECTION_CLOSE; - } else if (h_state == h_connection_upgrade) { - parser->flags |= F_CONNECTION_UPGRADE; - } - h_state = h_matching_connection_token_start; - parser->index = 0; - } else if (ch != ' ') { - h_state = h_matching_connection_token; - } - break; - - default: - UPDATE_STATE(s_header_value); - h_state = h_general; - break; - } - } - parser->header_state = h_state; - - if (p == data + len) - --p; - - COUNT_HEADER_SIZE(p - start); - break; - } - - case s_header_almost_done: - { - if (UNLIKELY(ch != LF)) { - SET_ERRNO(HPE_LF_EXPECTED); - goto error; - } - - UPDATE_STATE(s_header_value_lws); - break; - } - - case s_header_value_lws: - { - if (ch == ' ' || ch == '\t') { - if (parser->header_state == h_content_length_num) { - /* treat obsolete line folding as space */ - parser->header_state = h_content_length_ws; - } - UPDATE_STATE(s_header_value_start); - REEXECUTE(); - } - - /* finished the header */ - switch (parser->header_state) { - case h_connection_keep_alive: - parser->flags |= F_CONNECTION_KEEP_ALIVE; - break; - case h_connection_close: - parser->flags |= F_CONNECTION_CLOSE; - break; - case h_transfer_encoding_chunked: - parser->flags |= F_CHUNKED; - break; - case h_connection_upgrade: - parser->flags |= F_CONNECTION_UPGRADE; - break; - default: - break; - } - - UPDATE_STATE(s_header_field_start); - REEXECUTE(); - } - - case s_header_value_discard_ws_almost_done: - { - STRICT_CHECK(ch != LF); - UPDATE_STATE(s_header_value_discard_lws); - break; - } - - case s_header_value_discard_lws: - { - if (ch == ' ' || ch == '\t') { - UPDATE_STATE(s_header_value_discard_ws); - break; - } else { - switch (parser->header_state) { - case h_connection_keep_alive: - parser->flags |= F_CONNECTION_KEEP_ALIVE; - break; - case h_connection_close: - parser->flags |= F_CONNECTION_CLOSE; - break; - case h_connection_upgrade: - parser->flags |= F_CONNECTION_UPGRADE; - break; - case h_transfer_encoding_chunked: - parser->flags |= F_CHUNKED; - break; - case h_content_length: - /* do not allow empty content length */ - SET_ERRNO(HPE_INVALID_CONTENT_LENGTH); - goto error; - break; - default: - break; - } - - /* header value was empty */ - MARK(header_value); - UPDATE_STATE(s_header_field_start); - CALLBACK_DATA_NOADVANCE(header_value); - REEXECUTE(); - } - } - - case s_headers_almost_done: - { - STRICT_CHECK(ch != LF); - - if (parser->flags & F_TRAILING) { - /* End of a chunked request */ - UPDATE_STATE(s_message_done); - CALLBACK_NOTIFY_NOADVANCE(chunk_complete); - REEXECUTE(); - } - - /* Cannot use chunked encoding and a content-length header together - per the HTTP specification. */ - if ((parser->flags & F_CHUNKED) && - (parser->flags & F_CONTENTLENGTH)) { - SET_ERRNO(HPE_UNEXPECTED_CONTENT_LENGTH); - goto error; - } - - UPDATE_STATE(s_headers_done); - - /* Set this here so that on_headers_complete() callbacks can see it */ - if ((parser->flags & F_UPGRADE) && - (parser->flags & F_CONNECTION_UPGRADE)) { - /* For responses, "Upgrade: foo" and "Connection: upgrade" are - * mandatory only when it is a 101 Switching Protocols response, - * otherwise it is purely informational, to announce support. - */ - parser->upgrade = - (parser->type == HTTP_REQUEST || parser->status_code == 101); - } else { - parser->upgrade = (parser->method == HTTP_CONNECT); - } - - /* Here we call the headers_complete callback. This is somewhat - * different than other callbacks because if the user returns 1, we - * will interpret that as saying that this message has no body. This - * is needed for the annoying case of recieving a response to a HEAD - * request. - * - * We'd like to use CALLBACK_NOTIFY_NOADVANCE() here but we cannot, so - * we have to simulate it by handling a change in errno below. - */ - if (settings->on_headers_complete) { - switch (settings->on_headers_complete(parser)) { - case 0: - break; - - case 2: - parser->upgrade = 1; - - /* fall through */ - case 1: - parser->flags |= F_SKIPBODY; - break; - - default: - SET_ERRNO(HPE_CB_headers_complete); - RETURN(p - data); /* Error */ - } - } - - if (HTTP_PARSER_ERRNO(parser) != HPE_OK) { - RETURN(p - data); - } - - REEXECUTE(); - } - - case s_headers_done: - { - int hasBody; - STRICT_CHECK(ch != LF); - - parser->nread = 0; - nread = 0; - - hasBody = parser->flags & F_CHUNKED || - (parser->content_length > 0 && parser->content_length != ULLONG_MAX); - if (parser->upgrade && (parser->method == HTTP_CONNECT || - (parser->flags & F_SKIPBODY) || !hasBody)) { - /* Exit, the rest of the message is in a different protocol. */ - UPDATE_STATE(NEW_MESSAGE()); - CALLBACK_NOTIFY(message_complete); - RETURN((p - data) + 1); - } - - if (parser->flags & F_SKIPBODY) { - UPDATE_STATE(NEW_MESSAGE()); - CALLBACK_NOTIFY(message_complete); - } else if (parser->flags & F_CHUNKED) { - /* chunked encoding - ignore Content-Length header */ - UPDATE_STATE(s_chunk_size_start); - } else { - if (parser->content_length == 0) { - /* Content-Length header given but zero: Content-Length: 0\r\n */ - UPDATE_STATE(NEW_MESSAGE()); - CALLBACK_NOTIFY(message_complete); - } else if (parser->content_length != ULLONG_MAX) { - /* Content-Length header given and non-zero */ - UPDATE_STATE(s_body_identity); - } else { - if (!http_message_needs_eof(parser)) { - /* Assume content-length 0 - read the next */ - UPDATE_STATE(NEW_MESSAGE()); - CALLBACK_NOTIFY(message_complete); - } else { - /* Read body until EOF */ - UPDATE_STATE(s_body_identity_eof); - } - } - } - - break; - } - - case s_body_identity: - { - uint64_t to_read = MIN(parser->content_length, - (uint64_t) ((data + len) - p)); - - assert(parser->content_length != 0 - && parser->content_length != ULLONG_MAX); - - /* The difference between advancing content_length and p is because - * the latter will automaticaly advance on the next loop iteration. - * Further, if content_length ends up at 0, we want to see the last - * byte again for our message complete callback. - */ - MARK(body); - parser->content_length -= to_read; - p += to_read - 1; - - if (parser->content_length == 0) { - UPDATE_STATE(s_message_done); - - /* Mimic CALLBACK_DATA_NOADVANCE() but with one extra byte. - * - * The alternative to doing this is to wait for the next byte to - * trigger the data callback, just as in every other case. The - * problem with this is that this makes it difficult for the test - * harness to distinguish between complete-on-EOF and - * complete-on-length. It's not clear that this distinction is - * important for applications, but let's keep it for now. - */ - CALLBACK_DATA_(body, p - body_mark + 1, p - data); - REEXECUTE(); - } - - break; - } - - /* read until EOF */ - case s_body_identity_eof: - MARK(body); - p = data + len - 1; - - break; - - case s_message_done: - UPDATE_STATE(NEW_MESSAGE()); - CALLBACK_NOTIFY(message_complete); - if (parser->upgrade) { - /* Exit, the rest of the message is in a different protocol. */ - RETURN((p - data) + 1); - } - break; - - case s_chunk_size_start: - { - assert(nread == 1); - assert(parser->flags & F_CHUNKED); - - unhex_val = unhex[(unsigned char)ch]; - if (UNLIKELY(unhex_val == -1)) { - SET_ERRNO(HPE_INVALID_CHUNK_SIZE); - goto error; - } - - parser->content_length = unhex_val; - UPDATE_STATE(s_chunk_size); - break; - } - - case s_chunk_size: - { - uint64_t t; - - assert(parser->flags & F_CHUNKED); - - if (ch == CR) { - UPDATE_STATE(s_chunk_size_almost_done); - break; - } - - unhex_val = unhex[(unsigned char)ch]; - - if (unhex_val == -1) { - if (ch == ';' || ch == ' ') { - UPDATE_STATE(s_chunk_parameters); - break; - } - - SET_ERRNO(HPE_INVALID_CHUNK_SIZE); - goto error; - } - - t = parser->content_length; - t *= 16; - t += unhex_val; - - /* Overflow? Test against a conservative limit for simplicity. */ - if (UNLIKELY((ULLONG_MAX - 16) / 16 < parser->content_length)) { - SET_ERRNO(HPE_INVALID_CONTENT_LENGTH); - goto error; - } - - parser->content_length = t; - break; - } - - case s_chunk_parameters: - { - assert(parser->flags & F_CHUNKED); - /* just ignore this shit. TODO check for overflow */ - if (ch == CR) { - UPDATE_STATE(s_chunk_size_almost_done); - break; - } - break; - } - - case s_chunk_size_almost_done: - { - assert(parser->flags & F_CHUNKED); - STRICT_CHECK(ch != LF); - - parser->nread = 0; - nread = 0; - - if (parser->content_length == 0) { - parser->flags |= F_TRAILING; - UPDATE_STATE(s_header_field_start); - } else { - UPDATE_STATE(s_chunk_data); - } - CALLBACK_NOTIFY(chunk_header); - break; - } - - case s_chunk_data: - { - uint64_t to_read = MIN(parser->content_length, - (uint64_t) ((data + len) - p)); - - assert(parser->flags & F_CHUNKED); - assert(parser->content_length != 0 - && parser->content_length != ULLONG_MAX); - - /* See the explanation in s_body_identity for why the content - * length and data pointers are managed this way. - */ - MARK(body); - parser->content_length -= to_read; - p += to_read - 1; - - if (parser->content_length == 0) { - UPDATE_STATE(s_chunk_data_almost_done); - } - - break; - } - - case s_chunk_data_almost_done: - assert(parser->flags & F_CHUNKED); - assert(parser->content_length == 0); - STRICT_CHECK(ch != CR); - UPDATE_STATE(s_chunk_data_done); - CALLBACK_DATA(body); - break; - - case s_chunk_data_done: - assert(parser->flags & F_CHUNKED); - STRICT_CHECK(ch != LF); - parser->nread = 0; - nread = 0; - UPDATE_STATE(s_chunk_size_start); - CALLBACK_NOTIFY(chunk_complete); - break; - - default: - assert(0 && "unhandled state"); - SET_ERRNO(HPE_INVALID_INTERNAL_STATE); - goto error; - } - } - - /* Run callbacks for any marks that we have leftover after we ran out of - * bytes. There should be at most one of these set, so it's OK to invoke - * them in series (unset marks will not result in callbacks). - * - * We use the NOADVANCE() variety of callbacks here because 'p' has already - * overflowed 'data' and this allows us to correct for the off-by-one that - * we'd otherwise have (since CALLBACK_DATA() is meant to be run with a 'p' - * value that's in-bounds). - */ - - assert(((header_field_mark ? 1 : 0) + - (header_value_mark ? 1 : 0) + - (url_mark ? 1 : 0) + - (body_mark ? 1 : 0) + - (status_mark ? 1 : 0)) <= 1); - - CALLBACK_DATA_NOADVANCE(header_field); - CALLBACK_DATA_NOADVANCE(header_value); - CALLBACK_DATA_NOADVANCE(url); - CALLBACK_DATA_NOADVANCE(body); - CALLBACK_DATA_NOADVANCE(status); - - RETURN(len); - -error: - if (HTTP_PARSER_ERRNO(parser) == HPE_OK) { - SET_ERRNO(HPE_UNKNOWN); - } - - RETURN(p - data); -} - - -/* Does the parser need to see an EOF to find the end of the message? */ -int -http_message_needs_eof (const http_parser *parser) -{ - if (parser->type == HTTP_REQUEST) { - return 0; - } - - /* See RFC 2616 section 4.4 */ - if (parser->status_code / 100 == 1 || /* 1xx e.g. Continue */ - parser->status_code == 204 || /* No Content */ - parser->status_code == 304 || /* Not Modified */ - parser->flags & F_SKIPBODY) { /* response to a HEAD request */ - return 0; - } - - if ((parser->flags & F_CHUNKED) || parser->content_length != ULLONG_MAX) { - return 0; - } - - return 1; -} - - -int -http_should_keep_alive (const http_parser *parser) -{ - if (parser->http_major > 0 && parser->http_minor > 0) { - /* HTTP/1.1 */ - if (parser->flags & F_CONNECTION_CLOSE) { - return 0; - } - } else { - /* HTTP/1.0 or earlier */ - if (!(parser->flags & F_CONNECTION_KEEP_ALIVE)) { - return 0; - } - } - - return !http_message_needs_eof(parser); -} - - -const char * -http_method_str (enum http_method m) -{ - return ELEM_AT(method_strings, m, ""); -} - -const char * -http_status_str (enum http_status s) -{ - switch (s) { -#define XX(num, name, string) case HTTP_STATUS_##name: return #string; - HTTP_STATUS_MAP(XX) -#undef XX - default: return ""; - } -} - -void -http_parser_init (http_parser *parser, enum http_parser_type t) -{ - void *data = parser->data; /* preserve application data */ - memset(parser, 0, sizeof(*parser)); - parser->data = data; - parser->type = t; - parser->state = (t == HTTP_REQUEST ? s_start_req : (t == HTTP_RESPONSE ? s_start_res : s_start_req_or_res)); - parser->http_errno = HPE_OK; -} - -void -http_parser_settings_init(http_parser_settings *settings) -{ - memset(settings, 0, sizeof(*settings)); -} - -const char * -http_errno_name(enum http_errno err) { - assert(((size_t) err) < ARRAY_SIZE(http_strerror_tab)); - return http_strerror_tab[err].name; -} - -const char * -http_errno_description(enum http_errno err) { - assert(((size_t) err) < ARRAY_SIZE(http_strerror_tab)); - return http_strerror_tab[err].description; -} - -static enum http_host_state -http_parse_host_char(enum http_host_state s, const char ch) { - switch(s) { - case s_http_userinfo: - case s_http_userinfo_start: - if (ch == '@') { - return s_http_host_start; - } - - if (IS_USERINFO_CHAR(ch)) { - return s_http_userinfo; - } - break; - - case s_http_host_start: - if (ch == '[') { - return s_http_host_v6_start; - } - - if (IS_HOST_CHAR(ch)) { - return s_http_host; - } - - break; - - case s_http_host: - if (IS_HOST_CHAR(ch)) { - return s_http_host; - } - - /* fall through */ - case s_http_host_v6_end: - if (ch == ':') { - return s_http_host_port_start; - } - - break; - - case s_http_host_v6: - if (ch == ']') { - return s_http_host_v6_end; - } - - /* fall through */ - case s_http_host_v6_start: - if (IS_HEX(ch) || ch == ':' || ch == '.') { - return s_http_host_v6; - } - - if (s == s_http_host_v6 && ch == '%') { - return s_http_host_v6_zone_start; - } - break; - - case s_http_host_v6_zone: - if (ch == ']') { - return s_http_host_v6_end; - } - - /* fall through */ - case s_http_host_v6_zone_start: - /* RFC 6874 Zone ID consists of 1*( unreserved / pct-encoded) */ - if (IS_ALPHANUM(ch) || ch == '%' || ch == '.' || ch == '-' || ch == '_' || - ch == '~') { - return s_http_host_v6_zone; - } - break; - - case s_http_host_port: - case s_http_host_port_start: - if (IS_NUM(ch)) { - return s_http_host_port; - } - - break; - - default: - break; - } - return s_http_host_dead; -} - -static int -http_parse_host(const char * buf, struct http_parser_url *u, int found_at) { - enum http_host_state s; - - const char *p; - size_t buflen = u->field_data[UF_HOST].off + u->field_data[UF_HOST].len; - - assert(u->field_set & (1 << UF_HOST)); - - u->field_data[UF_HOST].len = 0; - - s = found_at ? s_http_userinfo_start : s_http_host_start; - - for (p = buf + u->field_data[UF_HOST].off; p < buf + buflen; p++) { - enum http_host_state new_s = http_parse_host_char(s, *p); - - if (new_s == s_http_host_dead) { - return 1; - } - - switch(new_s) { - case s_http_host: - if (s != s_http_host) { - u->field_data[UF_HOST].off = (uint16_t)(p - buf); - } - u->field_data[UF_HOST].len++; - break; - - case s_http_host_v6: - if (s != s_http_host_v6) { - u->field_data[UF_HOST].off = (uint16_t)(p - buf); - } - u->field_data[UF_HOST].len++; - break; - - case s_http_host_v6_zone_start: - case s_http_host_v6_zone: - u->field_data[UF_HOST].len++; - break; - - case s_http_host_port: - if (s != s_http_host_port) { - u->field_data[UF_PORT].off = (uint16_t)(p - buf); - u->field_data[UF_PORT].len = 0; - u->field_set |= (1 << UF_PORT); - } - u->field_data[UF_PORT].len++; - break; - - case s_http_userinfo: - if (s != s_http_userinfo) { - u->field_data[UF_USERINFO].off = (uint16_t)(p - buf); - u->field_data[UF_USERINFO].len = 0; - u->field_set |= (1 << UF_USERINFO); - } - u->field_data[UF_USERINFO].len++; - break; - - default: - break; - } - s = new_s; - } - - /* Make sure we don't end somewhere unexpected */ - switch (s) { - case s_http_host_start: - case s_http_host_v6_start: - case s_http_host_v6: - case s_http_host_v6_zone_start: - case s_http_host_v6_zone: - case s_http_host_port_start: - case s_http_userinfo: - case s_http_userinfo_start: - return 1; - default: - break; - } - - return 0; -} - -void -http_parser_url_init(struct http_parser_url *u) { - memset(u, 0, sizeof(*u)); -} - -int -http_parser_parse_url(const char *buf, size_t buflen, int is_connect, - struct http_parser_url *u) -{ - enum state s; - const char *p; - enum http_parser_url_fields uf, old_uf; - int found_at = 0; - - if (buflen == 0) { - return 1; - } - - u->port = u->field_set = 0; - s = is_connect ? s_req_server_start : s_req_spaces_before_url; - old_uf = UF_MAX; - - for (p = buf; p < buf + buflen; p++) { - s = parse_url_char(s, *p); - - /* Figure out the next field that we're operating on */ - switch (s) { - case s_dead: - return 1; - - /* Skip delimeters */ - case s_req_schema_slash: - case s_req_schema_slash_slash: - case s_req_server_start: - case s_req_query_string_start: - case s_req_fragment_start: - continue; - - case s_req_schema: - uf = UF_SCHEMA; - break; - - case s_req_server_with_at: - found_at = 1; - - /* fall through */ - case s_req_server: - uf = UF_HOST; - break; - - case s_req_path: - uf = UF_PATH; - break; - - case s_req_query_string: - uf = UF_QUERY; - break; - - case s_req_fragment: - uf = UF_FRAGMENT; - break; - - default: - assert(!"Unexpected state"); - return 1; - } - - /* Nothing's changed; soldier on */ - if (uf == old_uf) { - u->field_data[uf].len++; - continue; - } - - u->field_data[uf].off = (uint16_t)(p - buf); - u->field_data[uf].len = 1; - - u->field_set |= (1 << uf); - old_uf = uf; - } - - /* host must be present if there is a schema */ - /* parsing http:///toto will fail */ - if ((u->field_set & (1 << UF_SCHEMA)) && - (u->field_set & (1 << UF_HOST)) == 0) { - return 1; - } - - if (u->field_set & (1 << UF_HOST)) { - if (http_parse_host(buf, u, found_at) != 0) { - return 1; - } - } - - /* CONNECT requests can only contain "hostname:port" */ - if (is_connect && u->field_set != ((1 << UF_HOST)|(1 << UF_PORT))) { - return 1; - } - - if (u->field_set & (1 << UF_PORT)) { - uint16_t off; - uint16_t len; - const char* p; - const char* end; - unsigned long v; - - off = u->field_data[UF_PORT].off; - len = u->field_data[UF_PORT].len; - end = buf + off + len; - - /* NOTE: The characters are already validated and are in the [0-9] range */ - assert(off + len <= buflen && "Port number overflow"); - v = 0; - for (p = buf + off; p < end; p++) { - v *= 10; - v += *p - '0'; - - /* Ports have a max value of 2^16 */ - if (v > 0xffff) { - return 1; - } - } - - u->port = (uint16_t) v; - } - - return 0; -} - -void -http_parser_pause(http_parser *parser, int paused) { - /* Users should only be pausing/unpausing a parser that is not in an error - * state. In non-debug builds, there's not much that we can do about this - * other than ignore it. - */ - if (HTTP_PARSER_ERRNO(parser) == HPE_OK || - HTTP_PARSER_ERRNO(parser) == HPE_PAUSED) { - uint32_t nread = parser->nread; /* used by the SET_ERRNO macro */ - SET_ERRNO((paused) ? HPE_PAUSED : HPE_OK); - } else { - assert(0 && "Attempting to pause parser in error state"); - } -} - -int -http_body_is_final(const struct http_parser *parser) { - return parser->state == s_message_done; -} - -unsigned long -http_parser_version(void) { - return HTTP_PARSER_VERSION_MAJOR * 0x10000 | - HTTP_PARSER_VERSION_MINOR * 0x00100 | - HTTP_PARSER_VERSION_PATCH * 0x00001; -} - -void -http_parser_set_max_header_size(uint32_t size) { - max_header_size = size; -} diff --git a/src/http_parser.h b/src/http_parser.h deleted file mode 100644 index 16b5281..0000000 --- a/src/http_parser.h +++ /dev/null @@ -1,439 +0,0 @@ -/* 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 - -/* Also update SONAME in the Makefile whenever you change these. */ -#define HTTP_PARSER_VERSION_MAJOR 2 -#define HTTP_PARSER_VERSION_MINOR 9 -#define HTTP_PARSER_VERSION_PATCH 2 - -#include -#if defined(_WIN32) && !defined(__MINGW32__) && \ - (!defined(_MSC_VER) || _MSC_VER<1600) && !defined(__WINE__) -#include -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; -#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 - -/* Maximium header size allowed. If the macro is not defined - * before including this header then the default is used. To - * change the maximum header size, define the macro in the build - * environment (e.g. -DHTTP_MAX_HEADER_SIZE=). To remove - * the effective limit on the size of the header, define the macro - * to a very large number (e.g. -DHTTP_MAX_HEADER_SIZE=0x7fffffff) - */ -#ifndef HTTP_MAX_HEADER_SIZE -# define HTTP_MAX_HEADER_SIZE (80*1024) -#endif - -typedef struct http_parser http_parser; -typedef struct http_parser_settings http_parser_settings; - - -/* 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. - * - * Returning `2` from on_headers_complete will tell parser that it should not - * expect neither a body nor any futher responses on this connection. This is - * useful for handling responses to a CONNECT request which may not contain - * `Upgrade` or `Connection: upgrade` headers. - * - * http_data_cb does not return data chunks. It will be called arbitrarily - * many times for each string. E.G. you might get 10 callbacks for "on_url" - * 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*); - - -/* Status Codes */ -#define HTTP_STATUS_MAP(XX) \ - XX(100, CONTINUE, Continue) \ - XX(101, SWITCHING_PROTOCOLS, Switching Protocols) \ - XX(102, PROCESSING, Processing) \ - XX(200, OK, OK) \ - XX(201, CREATED, Created) \ - XX(202, ACCEPTED, Accepted) \ - XX(203, NON_AUTHORITATIVE_INFORMATION, Non-Authoritative Information) \ - XX(204, NO_CONTENT, No Content) \ - XX(205, RESET_CONTENT, Reset Content) \ - XX(206, PARTIAL_CONTENT, Partial Content) \ - XX(207, MULTI_STATUS, Multi-Status) \ - XX(208, ALREADY_REPORTED, Already Reported) \ - XX(226, IM_USED, IM Used) \ - XX(300, MULTIPLE_CHOICES, Multiple Choices) \ - XX(301, MOVED_PERMANENTLY, Moved Permanently) \ - XX(302, FOUND, Found) \ - XX(303, SEE_OTHER, See Other) \ - XX(304, NOT_MODIFIED, Not Modified) \ - XX(305, USE_PROXY, Use Proxy) \ - XX(307, TEMPORARY_REDIRECT, Temporary Redirect) \ - XX(308, PERMANENT_REDIRECT, Permanent Redirect) \ - XX(400, BAD_REQUEST, Bad Request) \ - XX(401, UNAUTHORIZED, Unauthorized) \ - XX(402, PAYMENT_REQUIRED, Payment Required) \ - XX(403, FORBIDDEN, Forbidden) \ - XX(404, NOT_FOUND, Not Found) \ - XX(405, METHOD_NOT_ALLOWED, Method Not Allowed) \ - XX(406, NOT_ACCEPTABLE, Not Acceptable) \ - XX(407, PROXY_AUTHENTICATION_REQUIRED, Proxy Authentication Required) \ - XX(408, REQUEST_TIMEOUT, Request Timeout) \ - XX(409, CONFLICT, Conflict) \ - XX(410, GONE, Gone) \ - XX(411, LENGTH_REQUIRED, Length Required) \ - XX(412, PRECONDITION_FAILED, Precondition Failed) \ - XX(413, PAYLOAD_TOO_LARGE, Payload Too Large) \ - XX(414, URI_TOO_LONG, URI Too Long) \ - XX(415, UNSUPPORTED_MEDIA_TYPE, Unsupported Media Type) \ - XX(416, RANGE_NOT_SATISFIABLE, Range Not Satisfiable) \ - XX(417, EXPECTATION_FAILED, Expectation Failed) \ - XX(421, MISDIRECTED_REQUEST, Misdirected Request) \ - XX(422, UNPROCESSABLE_ENTITY, Unprocessable Entity) \ - XX(423, LOCKED, Locked) \ - XX(424, FAILED_DEPENDENCY, Failed Dependency) \ - XX(426, UPGRADE_REQUIRED, Upgrade Required) \ - XX(428, PRECONDITION_REQUIRED, Precondition Required) \ - XX(429, TOO_MANY_REQUESTS, Too Many Requests) \ - XX(431, REQUEST_HEADER_FIELDS_TOO_LARGE, Request Header Fields Too Large) \ - XX(451, UNAVAILABLE_FOR_LEGAL_REASONS, Unavailable For Legal Reasons) \ - XX(500, INTERNAL_SERVER_ERROR, Internal Server Error) \ - XX(501, NOT_IMPLEMENTED, Not Implemented) \ - XX(502, BAD_GATEWAY, Bad Gateway) \ - XX(503, SERVICE_UNAVAILABLE, Service Unavailable) \ - XX(504, GATEWAY_TIMEOUT, Gateway Timeout) \ - XX(505, HTTP_VERSION_NOT_SUPPORTED, HTTP Version Not Supported) \ - XX(506, VARIANT_ALSO_NEGOTIATES, Variant Also Negotiates) \ - XX(507, INSUFFICIENT_STORAGE, Insufficient Storage) \ - XX(508, LOOP_DETECTED, Loop Detected) \ - XX(510, NOT_EXTENDED, Not Extended) \ - XX(511, NETWORK_AUTHENTICATION_REQUIRED, Network Authentication Required) \ - -enum http_status - { -#define XX(num, name, string) HTTP_STATUS_##name = num, - HTTP_STATUS_MAP(XX) -#undef XX - }; - - -/* Request Methods */ -#define HTTP_METHOD_MAP(XX) \ - XX(0, DELETE, DELETE) \ - XX(1, GET, GET) \ - XX(2, HEAD, HEAD) \ - XX(3, POST, POST) \ - XX(4, PUT, PUT) \ - /* pathological */ \ - XX(5, CONNECT, CONNECT) \ - XX(6, OPTIONS, OPTIONS) \ - XX(7, TRACE, TRACE) \ - /* WebDAV */ \ - XX(8, COPY, COPY) \ - XX(9, LOCK, LOCK) \ - XX(10, MKCOL, MKCOL) \ - XX(11, MOVE, MOVE) \ - XX(12, PROPFIND, PROPFIND) \ - XX(13, PROPPATCH, PROPPATCH) \ - XX(14, SEARCH, SEARCH) \ - XX(15, UNLOCK, UNLOCK) \ - XX(16, BIND, BIND) \ - XX(17, REBIND, REBIND) \ - XX(18, UNBIND, UNBIND) \ - XX(19, ACL, ACL) \ - /* subversion */ \ - XX(20, REPORT, REPORT) \ - XX(21, MKACTIVITY, MKACTIVITY) \ - XX(22, CHECKOUT, CHECKOUT) \ - XX(23, MERGE, MERGE) \ - /* upnp */ \ - XX(24, MSEARCH, M-SEARCH) \ - XX(25, NOTIFY, NOTIFY) \ - XX(26, SUBSCRIBE, SUBSCRIBE) \ - XX(27, UNSUBSCRIBE, UNSUBSCRIBE) \ - /* RFC-5789 */ \ - XX(28, PATCH, PATCH) \ - XX(29, PURGE, PURGE) \ - /* CalDAV */ \ - XX(30, MKCALENDAR, MKCALENDAR) \ - /* RFC-2068, section 19.6.1.2 */ \ - XX(31, LINK, LINK) \ - XX(32, UNLINK, UNLINK) \ - /* icecast */ \ - XX(33, SOURCE, SOURCE) \ - -enum http_method - { -#define XX(num, name, string) HTTP_##name = num, - HTTP_METHOD_MAP(XX) -#undef XX - }; - - -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_CONNECTION_UPGRADE = 1 << 3 - , F_TRAILING = 1 << 4 - , F_UPGRADE = 1 << 5 - , F_SKIPBODY = 1 << 6 - , F_CONTENTLENGTH = 1 << 7 - }; - - -/* 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") \ - XX(CB_status, "the on_status callback failed") \ - XX(CB_chunk_header, "the on_chunk_header callback failed") \ - XX(CB_chunk_complete, "the on_chunk_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(UNEXPECTED_CONTENT_LENGTH, \ - "unexpected 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) - - -struct http_parser { - /** PRIVATE **/ - unsigned int type : 2; /* enum http_parser_type */ - unsigned int flags : 8; /* F_* values from 'flags' enum; semi-public */ - unsigned int state : 7; /* enum state from http_parser.c */ - unsigned int header_state : 7; /* enum header_state from http_parser.c */ - unsigned int index : 7; /* index into current matcher */ - unsigned int lenient_http_headers : 1; - - 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 int status_code : 16; /* responses only */ - unsigned int method : 8; /* requests only */ - unsigned int 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 int upgrade : 1; - - /** 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_status; - 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; - /* When on_chunk_header is called, the current chunk length is stored - * in parser->content_length. - */ - http_cb on_chunk_header; - http_cb on_chunk_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_USERINFO = 6 - , UF_MAX = 7 - }; - - -/* 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]; -}; - - -/* Returns the library version. Bits 16-23 contain the major version number, - * bits 8-15 the minor version number and bits 0-7 the patch level. - * Usage example: - * - * unsigned long version = http_parser_version(); - * unsigned major = (version >> 16) & 255; - * unsigned minor = (version >> 8) & 255; - * unsigned patch = version & 255; - * printf("http_parser v%u.%u.%u\n", major, minor, patch); - */ -unsigned long http_parser_version(void); - -void http_parser_init(http_parser *parser, enum http_parser_type type); - - -/* Initialize http_parser_settings members to 0 - */ -void http_parser_settings_init(http_parser_settings *settings); - - -/* Executes the parser. Returns number of parsed bytes. Sets - * `parser->http_errno` on error. */ -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 0, then this 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(const http_parser *parser); - -/* Returns a string version of the HTTP method. */ -const char *http_method_str(enum http_method m); - -/* Returns a string version of the HTTP status code. */ -const char *http_status_str(enum http_status s); - -/* 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); - -/* Initialize all http_parser_url members to 0 */ -void http_parser_url_init(struct http_parser_url *u); - -/* 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); - -/* Checks if this is the final chunk of the body. */ -int http_body_is_final(const http_parser *parser); - -/* Change the maximum header size provided at compile time. */ -void http_parser_set_max_header_size(uint32_t size); - -#ifdef __cplusplus -} -#endif -#endif