1#ifndef HEADER_CURL_HTTP_H 2#define HEADER_CURL_HTTP_H 3/*************************************************************************** 4 * _ _ ____ _ 5 * Project ___| | | | _ \| | 6 * / __| | | | |_) | | 7 * | (__| |_| | _ <| |___ 8 * \___|\___/|_| \_\_____| 9 * 10 * Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al. 11 * 12 * This software is licensed as described in the file COPYING, which 13 * you should have received as part of this distribution. The terms 14 * are also available at https://curl.se/docs/copyright.html. 15 * 16 * You may opt to use, copy, modify, merge, publish, distribute and/or sell 17 * copies of the Software, and permit persons to whom the Software is 18 * furnished to do so, under the terms of the COPYING file. 19 * 20 * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY 21 * KIND, either express or implied. 22 * 23 * SPDX-License-Identifier: curl 24 * 25 ***************************************************************************/ 26#include "curl_setup.h" 27 28#if defined(USE_MSH3) && !defined(_WIN32) 29#include <pthread.h> 30#endif 31 32#include "bufq.h" 33#include "dynhds.h" 34#include "ws.h" 35 36typedef enum { 37 HTTPREQ_GET, 38 HTTPREQ_POST, 39 HTTPREQ_POST_FORM, /* we make a difference internally */ 40 HTTPREQ_POST_MIME, /* we make a difference internally */ 41 HTTPREQ_PUT, 42 HTTPREQ_HEAD 43} Curl_HttpReq; 44 45#ifndef CURL_DISABLE_HTTP 46 47#if defined(ENABLE_QUIC) 48#include <stdint.h> 49#endif 50 51extern const struct Curl_handler Curl_handler_http; 52 53#ifdef USE_SSL 54extern const struct Curl_handler Curl_handler_https; 55#endif 56 57struct dynhds; 58 59CURLcode Curl_bump_headersize(struct Curl_easy *data, 60 size_t delta, 61 bool connect_only); 62 63/* Header specific functions */ 64bool Curl_compareheader(const char *headerline, /* line to check */ 65 const char *header, /* header keyword _with_ colon */ 66 const size_t hlen, /* len of the keyword in bytes */ 67 const char *content, /* content string to find */ 68 const size_t clen); /* len of the content in bytes */ 69 70char *Curl_copy_header_value(const char *header); 71 72char *Curl_checkProxyheaders(struct Curl_easy *data, 73 const struct connectdata *conn, 74 const char *thisheader, 75 const size_t thislen); 76struct HTTP; /* see below */ 77CURLcode Curl_buffer_send(struct dynbuf *in, 78 struct Curl_easy *data, 79 struct HTTP *http, 80 curl_off_t *bytes_written, 81 curl_off_t included_body_bytes, 82 int socketindex); 83 84CURLcode Curl_add_timecondition(struct Curl_easy *data, 85#ifndef USE_HYPER 86 struct dynbuf *req 87#else 88 void *headers 89#endif 90 ); 91CURLcode Curl_add_custom_headers(struct Curl_easy *data, 92 bool is_connect, 93#ifndef USE_HYPER 94 struct dynbuf *req 95#else 96 void *headers 97#endif 98 ); 99CURLcode Curl_dynhds_add_custom(struct Curl_easy *data, 100 bool is_connect, 101 struct dynhds *hds); 102 103CURLcode Curl_http_compile_trailers(struct curl_slist *trailers, 104 struct dynbuf *buf, 105 struct Curl_easy *handle); 106 107void Curl_http_method(struct Curl_easy *data, struct connectdata *conn, 108 const char **method, Curl_HttpReq *); 109CURLcode Curl_http_useragent(struct Curl_easy *data); 110CURLcode Curl_http_host(struct Curl_easy *data, struct connectdata *conn); 111CURLcode Curl_http_target(struct Curl_easy *data, struct connectdata *conn, 112 struct dynbuf *req); 113CURLcode Curl_http_statusline(struct Curl_easy *data, 114 struct connectdata *conn); 115CURLcode Curl_http_header(struct Curl_easy *data, struct connectdata *conn, 116 char *headp); 117CURLcode Curl_transferencode(struct Curl_easy *data); 118CURLcode Curl_http_body(struct Curl_easy *data, struct connectdata *conn, 119 Curl_HttpReq httpreq, 120 const char **teep); 121CURLcode Curl_http_bodysend(struct Curl_easy *data, struct connectdata *conn, 122 struct dynbuf *r, Curl_HttpReq httpreq); 123bool Curl_use_http_1_1plus(const struct Curl_easy *data, 124 const struct connectdata *conn); 125#ifndef CURL_DISABLE_COOKIES 126CURLcode Curl_http_cookies(struct Curl_easy *data, 127 struct connectdata *conn, 128 struct dynbuf *r); 129#else 130#define Curl_http_cookies(a,b,c) CURLE_OK 131#endif 132CURLcode Curl_http_resume(struct Curl_easy *data, 133 struct connectdata *conn, 134 Curl_HttpReq httpreq); 135CURLcode Curl_http_range(struct Curl_easy *data, 136 Curl_HttpReq httpreq); 137CURLcode Curl_http_firstwrite(struct Curl_easy *data, 138 struct connectdata *conn, 139 bool *done); 140 141/* protocol-specific functions set up to be called by the main engine */ 142CURLcode Curl_http_setup_conn(struct Curl_easy *data, 143 struct connectdata *conn); 144CURLcode Curl_http(struct Curl_easy *data, bool *done); 145CURLcode Curl_http_done(struct Curl_easy *data, CURLcode, bool premature); 146CURLcode Curl_http_connect(struct Curl_easy *data, bool *done); 147int Curl_http_getsock_do(struct Curl_easy *data, struct connectdata *conn, 148 curl_socket_t *socks); 149CURLcode Curl_http_write_resp(struct Curl_easy *data, 150 const char *buf, size_t blen, 151 bool is_eos, 152 bool *done); 153 154/* These functions are in http.c */ 155CURLcode Curl_http_input_auth(struct Curl_easy *data, bool proxy, 156 const char *auth); 157CURLcode Curl_http_auth_act(struct Curl_easy *data); 158 159/* If only the PICKNONE bit is set, there has been a round-trip and we 160 selected to use no auth at all. Ie, we actively select no auth, as opposed 161 to not having one selected. The other CURLAUTH_* defines are present in the 162 public curl/curl.h header. */ 163#define CURLAUTH_PICKNONE (1<<30) /* don't use auth */ 164 165/* MAX_INITIAL_POST_SIZE indicates the number of bytes that will make the POST 166 data get included in the initial data chunk sent to the server. If the 167 data is larger than this, it will automatically get split up in multiple 168 system calls. 169 170 This value used to be fairly big (100K), but we must take into account that 171 if the server rejects the POST due for authentication reasons, this data 172 will always be unconditionally sent and thus it may not be larger than can 173 always be afforded to send twice. 174 175 It must not be greater than 64K to work on VMS. 176*/ 177#ifndef MAX_INITIAL_POST_SIZE 178#define MAX_INITIAL_POST_SIZE (64*1024) 179#endif 180 181/* EXPECT_100_THRESHOLD is the request body size limit for when libcurl will 182 * automatically add an "Expect: 100-continue" header in HTTP requests. When 183 * the size is unknown, it will always add it. 184 * 185 */ 186#ifndef EXPECT_100_THRESHOLD 187#define EXPECT_100_THRESHOLD (1024*1024) 188#endif 189 190/* MAX_HTTP_RESP_HEADER_SIZE is the maximum size of all response headers 191 combined that libcurl allows for a single HTTP response, any HTTP 192 version. This count includes CONNECT response headers. */ 193#define MAX_HTTP_RESP_HEADER_SIZE (300*1024) 194 195#endif /* CURL_DISABLE_HTTP */ 196 197/**************************************************************************** 198 * HTTP unique setup 199 ***************************************************************************/ 200struct HTTP { 201 curl_off_t postsize; /* off_t to handle large file sizes */ 202 const char *postdata; 203 struct back { 204 curl_read_callback fread_func; /* backup storage for fread pointer */ 205 void *fread_in; /* backup storage for fread_in pointer */ 206 const char *postdata; 207 curl_off_t postsize; 208 struct Curl_easy *data; 209 } backup; 210 211 enum { 212 HTTPSEND_NADA, /* init */ 213 HTTPSEND_REQUEST, /* sending a request */ 214 HTTPSEND_BODY /* sending body */ 215 } sending; 216 217#ifndef CURL_DISABLE_HTTP 218 void *h2_ctx; /* HTTP/2 implementation context */ 219 void *h3_ctx; /* HTTP/3 implementation context */ 220 struct dynbuf send_buffer; /* used if the request couldn't be sent in one 221 chunk, points to an allocated send_buffer 222 struct */ 223#endif 224}; 225 226CURLcode Curl_http_size(struct Curl_easy *data); 227 228CURLcode Curl_http_write_resp_hds(struct Curl_easy *data, 229 const char *buf, size_t blen, 230 size_t *pconsumed, 231 bool *done); 232 233/** 234 * Curl_http_output_auth() setups the authentication headers for the 235 * host/proxy and the correct authentication 236 * method. data->state.authdone is set to TRUE when authentication is 237 * done. 238 * 239 * @param data all information about the current transfer 240 * @param conn all information about the current connection 241 * @param request pointer to the request keyword 242 * @param httpreq is the request type 243 * @param path pointer to the requested path 244 * @param proxytunnel boolean if this is the request setting up a "proxy 245 * tunnel" 246 * 247 * @returns CURLcode 248 */ 249CURLcode 250Curl_http_output_auth(struct Curl_easy *data, 251 struct connectdata *conn, 252 const char *request, 253 Curl_HttpReq httpreq, 254 const char *path, 255 bool proxytunnel); /* TRUE if this is the request setting 256 up the proxy tunnel */ 257 258/* Decode HTTP status code string. */ 259CURLcode Curl_http_decode_status(int *pstatus, const char *s, size_t len); 260 261 262/** 263 * All about a core HTTP request, excluding body and trailers 264 */ 265struct httpreq { 266 char method[24]; 267 char *scheme; 268 char *authority; 269 char *path; 270 struct dynhds headers; 271 struct dynhds trailers; 272}; 273 274/** 275 * Create a HTTP request struct. 276 */ 277CURLcode Curl_http_req_make(struct httpreq **preq, 278 const char *method, size_t m_len, 279 const char *scheme, size_t s_len, 280 const char *authority, size_t a_len, 281 const char *path, size_t p_len); 282 283CURLcode Curl_http_req_make2(struct httpreq **preq, 284 const char *method, size_t m_len, 285 CURLU *url, const char *scheme_default); 286 287void Curl_http_req_free(struct httpreq *req); 288 289#define HTTP_PSEUDO_METHOD ":method" 290#define HTTP_PSEUDO_SCHEME ":scheme" 291#define HTTP_PSEUDO_AUTHORITY ":authority" 292#define HTTP_PSEUDO_PATH ":path" 293#define HTTP_PSEUDO_STATUS ":status" 294 295/** 296 * Create the list of HTTP/2 headers which represent the request, 297 * using HTTP/2 pseudo headers preceding the `req->headers`. 298 * 299 * Applies the following transformations: 300 * - if `authority` is set, any "Host" header is removed. 301 * - if `authority` is unset and a "Host" header is present, use 302 * that as `authority` and remove "Host" 303 * - removes and Connection header fields as defined in rfc9113 ch. 8.2.2 304 * - lower-cases the header field names 305 * 306 * @param h2_headers will contain the HTTP/2 headers on success 307 * @param req the request to transform 308 * @param data the handle to lookup defaults like ' :scheme' from 309 */ 310CURLcode Curl_http_req_to_h2(struct dynhds *h2_headers, 311 struct httpreq *req, struct Curl_easy *data); 312 313/** 314 * All about a core HTTP response, excluding body and trailers 315 */ 316struct http_resp { 317 int status; 318 char *description; 319 struct dynhds headers; 320 struct dynhds trailers; 321 struct http_resp *prev; 322}; 323 324/** 325 * Create a HTTP response struct. 326 */ 327CURLcode Curl_http_resp_make(struct http_resp **presp, 328 int status, 329 const char *description); 330 331void Curl_http_resp_free(struct http_resp *resp); 332 333#endif /* HEADER_CURL_HTTP_H */ 334