| 1 | /** |
| 2 | * Copyright (C) 2011-2012 Juho Vähä-Herttua |
| 3 | * |
| 4 | * This library is free software; you can redistribute it and/or |
| 5 | * modify it under the terms of the GNU Lesser General Public |
| 6 | * License as published by the Free Software Foundation; either |
| 7 | * version 2.1 of the License, or (at your option) any later version. |
| 8 | * |
| 9 | * This library is distributed in the hope that it will be useful, |
| 10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 12 | * Lesser General Public License for more details. |
| 13 | */ |
| 14 | |
| 15 | #include <stdlib.h> |
| 16 | #include <string.h> |
| 17 | #include <assert.h> |
| 18 | |
| 19 | #include "http_request.h" |
| 20 | #include "http_parser.h" |
| 21 | |
| 22 | struct http_request_s { |
| 23 | http_parser parser; |
| 24 | http_parser_settings parser_settings; |
| 25 | |
| 26 | const char *method; |
| 27 | char *url; |
| 28 | |
| 29 | char **headers; |
| 30 | int headers_size; |
| 31 | int headers_index; |
| 32 | |
| 33 | char *data; |
| 34 | int datalen; |
| 35 | |
| 36 | int complete; |
| 37 | }; |
| 38 | |
| 39 | static int |
| 40 | on_url(http_parser *parser, const char *at, size_t length) |
| 41 | { |
| 42 | http_request_t *request = parser->data; |
| 43 | int urllen = request->url ? strlen(request->url) : 0; |
| 44 | |
| 45 | request->url = realloc(request->url, urllen+length+1); |
| 46 | assert(request->url); |
| 47 | |
| 48 | request->url[urllen] = '\0'; |
| 49 | strncat(request->url, at, length); |
| 50 | return 0; |
| 51 | } |
| 52 | |
| 53 | static int |
| 54 | on_header_field(http_parser *parser, const char *at, size_t length) |
| 55 | { |
| 56 | http_request_t *request = parser->data; |
| 57 | |
| 58 | /* Check if our index is a value */ |
| 59 | if (request->headers_index%2 == 1) { |
| 60 | request->headers_index++; |
| 61 | } |
| 62 | |
| 63 | /* Allocate space for new field-value pair */ |
| 64 | if (request->headers_index == request->headers_size) { |
| 65 | request->headers_size += 2; |
| 66 | request->headers = realloc(request->headers, |
| 67 | request->headers_size*sizeof(char*)); |
| 68 | assert(request->headers); |
| 69 | request->headers[request->headers_index] = NULL; |
| 70 | request->headers[request->headers_index+1] = NULL; |
| 71 | } |
| 72 | |
| 73 | /* Allocate space in the current header string */ |
| 74 | if (request->headers[request->headers_index] == NULL) { |
| 75 | request->headers[request->headers_index] = calloc(1, length+1); |
| 76 | } else { |
| 77 | request->headers[request->headers_index] = realloc( |
| 78 | request->headers[request->headers_index], |
| 79 | strlen(request->headers[request->headers_index])+length+1 |
| 80 | ); |
| 81 | } |
| 82 | assert(request->headers[request->headers_index]); |
| 83 | |
| 84 | strncat(request->headers[request->headers_index], at, length); |
| 85 | return 0; |
| 86 | } |
| 87 | |
| 88 | static int |
| 89 | on_header_value(http_parser *parser, const char *at, size_t length) |
| 90 | { |
| 91 | http_request_t *request = parser->data; |
| 92 | |
| 93 | /* Check if our index is a field */ |
| 94 | if (request->headers_index%2 == 0) { |
| 95 | request->headers_index++; |
| 96 | } |
| 97 | |
| 98 | /* Allocate space in the current header string */ |
| 99 | if (request->headers[request->headers_index] == NULL) { |
| 100 | request->headers[request->headers_index] = calloc(1, length+1); |
| 101 | } else { |
| 102 | request->headers[request->headers_index] = realloc( |
| 103 | request->headers[request->headers_index], |
| 104 | strlen(request->headers[request->headers_index])+length+1 |
| 105 | ); |
| 106 | } |
| 107 | assert(request->headers[request->headers_index]); |
| 108 | |
| 109 | strncat(request->headers[request->headers_index], at, length); |
| 110 | return 0; |
| 111 | } |
| 112 | |
| 113 | static int |
| 114 | on_body(http_parser *parser, const char *at, size_t length) |
| 115 | { |
| 116 | http_request_t *request = parser->data; |
| 117 | |
| 118 | request->data = realloc(request->data, request->datalen+length); |
| 119 | assert(request->data); |
| 120 | |
| 121 | memcpy(request->data+request->datalen, at, length); |
| 122 | request->datalen += length; |
| 123 | return 0; |
| 124 | } |
| 125 | |
| 126 | static int |
| 127 | on_message_complete(http_parser *parser) |
| 128 | { |
| 129 | http_request_t *request = parser->data; |
| 130 | |
| 131 | request->method = http_method_str(request->parser.method); |
| 132 | request->complete = 1; |
| 133 | return 0; |
| 134 | } |
| 135 | |
| 136 | http_request_t * |
| 137 | http_request_init(int numerichost) |
| 138 | { |
| 139 | http_request_t *request; |
| 140 | |
| 141 | request = calloc(1, sizeof(http_request_t)); |
| 142 | if (!request) { |
| 143 | return NULL; |
| 144 | } |
| 145 | http_parser_init(&request->parser, HTTP_REQUEST, !!numerichost); |
| 146 | request->parser.data = request; |
| 147 | |
| 148 | request->parser_settings.on_url = &on_url; |
| 149 | request->parser_settings.on_header_field = &on_header_field; |
| 150 | request->parser_settings.on_header_value = &on_header_value; |
| 151 | request->parser_settings.on_body = &on_body; |
| 152 | request->parser_settings.on_message_complete = &on_message_complete; |
| 153 | |
| 154 | return request; |
| 155 | } |
| 156 | |
| 157 | void |
| 158 | http_request_destroy(http_request_t *request) |
| 159 | { |
| 160 | int i; |
| 161 | |
| 162 | if (request) { |
| 163 | free(request->url); |
| 164 | for (i=0; i<request->headers_size; i++) { |
| 165 | free(request->headers[i]); |
| 166 | } |
| 167 | free(request->headers); |
| 168 | free(request->data); |
| 169 | free(request); |
| 170 | } |
| 171 | } |
| 172 | |
| 173 | int |
| 174 | http_request_add_data(http_request_t *request, const char *data, int datalen) |
| 175 | { |
| 176 | int ret; |
| 177 | |
| 178 | assert(request); |
| 179 | |
| 180 | ret = http_parser_execute(&request->parser, |
| 181 | &request->parser_settings, |
| 182 | data, datalen); |
| 183 | return ret; |
| 184 | } |
| 185 | |
| 186 | int |
| 187 | http_request_is_complete(http_request_t *request) |
| 188 | { |
| 189 | assert(request); |
| 190 | return request->complete; |
| 191 | } |
| 192 | |
| 193 | int |
| 194 | http_request_has_error(http_request_t *request) |
| 195 | { |
| 196 | assert(request); |
| 197 | return (HTTP_PARSER_ERRNO(&request->parser) != HPE_OK); |
| 198 | } |
| 199 | |
| 200 | const char * |
| 201 | http_request_get_error_name(http_request_t *request) |
| 202 | { |
| 203 | assert(request); |
| 204 | return http_errno_name(HTTP_PARSER_ERRNO(&request->parser)); |
| 205 | } |
| 206 | |
| 207 | const char * |
| 208 | http_request_get_error_description(http_request_t *request) |
| 209 | { |
| 210 | assert(request); |
| 211 | return http_errno_description(HTTP_PARSER_ERRNO(&request->parser)); |
| 212 | } |
| 213 | |
| 214 | const char * |
| 215 | http_request_get_method(http_request_t *request) |
| 216 | { |
| 217 | assert(request); |
| 218 | return request->method; |
| 219 | } |
| 220 | |
| 221 | const char * |
| 222 | http_request_get_url(http_request_t *request) |
| 223 | { |
| 224 | assert(request); |
| 225 | return request->url; |
| 226 | } |
| 227 | |
| 228 | const char * |
| 229 | http_request_get_header(http_request_t *request, const char *name) |
| 230 | { |
| 231 | int i; |
| 232 | |
| 233 | assert(request); |
| 234 | |
| 235 | for (i=0; i<request->headers_size; i+=2) { |
| 236 | if (!strcmp(request->headers[i], name)) { |
| 237 | return request->headers[i+1]; |
| 238 | } |
| 239 | } |
| 240 | return NULL; |
| 241 | } |
| 242 | |
| 243 | const char * |
| 244 | http_request_get_data(http_request_t *request, int *datalen) |
| 245 | { |
| 246 | assert(request); |
| 247 | |
| 248 | if (datalen) { |
| 249 | *datalen = request->datalen; |
| 250 | } |
| 251 | return request->data; |
| 252 | } |