1 #ifndef HEADER_CURL_HTTP_H 2 #define HEADER_CURL_HTTP_H 3 /*************************************************************************** 4 * _ _ ____ _ 5 * Project ___| | | | _ \| | 6 * / __| | | | |_) | | 7 * | (__| |_| | _ <| |___ 8 * \___|\___/|_| \_\_____| 9 * 10 * Copyright (C) 1998 - 2019, 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.haxx.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 ***************************************************************************/ 24 #include "curl_setup.h" 25 26 #ifndef CURL_DISABLE_HTTP 27 28 #ifdef USE_NGHTTP2 29 #include <nghttp2/nghttp2.h> 30 #endif 31 32 extern const struct Curl_handler Curl_handler_http; 33 34 #ifdef USE_SSL 35 extern const struct Curl_handler Curl_handler_https; 36 #endif 37 38 /* Header specific functions */ 39 bool Curl_compareheader(const char *headerline, /* line to check */ 40 const char *header, /* header keyword _with_ colon */ 41 const char *content); /* content string to find */ 42 43 char *Curl_copy_header_value(const char *header); 44 45 char *Curl_checkProxyheaders(const struct connectdata *conn, 46 const char *thisheader); 47 /* ------------------------------------------------------------------------- */ 48 /* 49 * The add_buffer series of functions are used to build one large memory chunk 50 * from repeated function invokes. Used so that the entire HTTP request can 51 * be sent in one go. 52 */ 53 struct Curl_send_buffer { 54 char *buffer; 55 size_t size_max; 56 size_t size_used; 57 }; 58 typedef struct Curl_send_buffer Curl_send_buffer; 59 60 Curl_send_buffer *Curl_add_buffer_init(void); 61 void Curl_add_buffer_free(Curl_send_buffer **inp); 62 CURLcode Curl_add_bufferf(Curl_send_buffer **inp, const char *fmt, ...) 63 WARN_UNUSED_RESULT; 64 CURLcode Curl_add_buffer(Curl_send_buffer **inp, const void *inptr, 65 size_t size) WARN_UNUSED_RESULT; 66 CURLcode Curl_add_buffer_send(Curl_send_buffer **inp, 67 struct connectdata *conn, 68 curl_off_t *bytes_written, 69 size_t included_body_bytes, 70 int socketindex); 71 72 CURLcode Curl_add_timecondition(struct Curl_easy *data, 73 Curl_send_buffer *buf); 74 CURLcode Curl_add_custom_headers(struct connectdata *conn, 75 bool is_connect, 76 Curl_send_buffer *req_buffer); 77 CURLcode Curl_http_compile_trailers(struct curl_slist *trailers, 78 Curl_send_buffer *buffer, 79 struct Curl_easy *handle); 80 81 /* protocol-specific functions set up to be called by the main engine */ 82 CURLcode Curl_http(struct connectdata *conn, bool *done); 83 CURLcode Curl_http_done(struct connectdata *, CURLcode, bool premature); 84 CURLcode Curl_http_connect(struct connectdata *conn, bool *done); 85 CURLcode Curl_http_setup_conn(struct connectdata *conn); 86 87 /* The following functions are defined in http_chunks.c */ 88 void Curl_httpchunk_init(struct connectdata *conn); 89 CHUNKcode Curl_httpchunk_read(struct connectdata *conn, char *datap, 90 ssize_t length, ssize_t *wrote); 91 92 /* These functions are in http.c */ 93 void Curl_http_auth_stage(struct Curl_easy *data, int stage); 94 CURLcode Curl_http_input_auth(struct connectdata *conn, bool proxy, 95 const char *auth); 96 CURLcode Curl_http_auth_act(struct connectdata *conn); 97 CURLcode Curl_http_perhapsrewind(struct connectdata *conn); 98 99 /* If only the PICKNONE bit is set, there has been a round-trip and we 100 selected to use no auth at all. Ie, we actively select no auth, as opposed 101 to not having one selected. The other CURLAUTH_* defines are present in the 102 public curl/curl.h header. */ 103 #define CURLAUTH_PICKNONE (1<<30) /* don't use auth */ 104 105 /* MAX_INITIAL_POST_SIZE indicates the number of bytes that will make the POST 106 data get included in the initial data chunk sent to the server. If the 107 data is larger than this, it will automatically get split up in multiple 108 system calls. 109 110 This value used to be fairly big (100K), but we must take into account that 111 if the server rejects the POST due for authentication reasons, this data 112 will always be unconditionally sent and thus it may not be larger than can 113 always be afforded to send twice. 114 115 It must not be greater than 64K to work on VMS. 116 */ 117 #ifndef MAX_INITIAL_POST_SIZE 118 #define MAX_INITIAL_POST_SIZE (64*1024) 119 #endif 120 121 /* EXPECT_100_THRESHOLD is the request body size limit for when libcurl will 122 * automatically add an "Expect: 100-continue" header in HTTP requests. When 123 * the size is unknown, it will always add it. 124 * 125 */ 126 #ifndef EXPECT_100_THRESHOLD 127 #define EXPECT_100_THRESHOLD 1024 128 #endif 129 130 #endif /* CURL_DISABLE_HTTP */ 131 132 /**************************************************************************** 133 * HTTP unique setup 134 ***************************************************************************/ 135 struct HTTP { 136 curl_mimepart *sendit; 137 curl_off_t postsize; /* off_t to handle large file sizes */ 138 const char *postdata; 139 140 const char *p_pragma; /* Pragma: string */ 141 const char *p_accept; /* Accept: string */ 142 143 /* For FORM posting */ 144 curl_mimepart form; 145 146 struct back { 147 curl_read_callback fread_func; /* backup storage for fread pointer */ 148 void *fread_in; /* backup storage for fread_in pointer */ 149 const char *postdata; 150 curl_off_t postsize; 151 } backup; 152 153 enum { 154 HTTPSEND_NADA, /* init */ 155 HTTPSEND_REQUEST, /* sending a request */ 156 HTTPSEND_BODY, /* sending body */ 157 HTTPSEND_LAST /* never use this */ 158 } sending; 159 160 #ifndef CURL_DISABLE_HTTP 161 Curl_send_buffer *send_buffer; /* used if the request couldn't be sent in 162 one chunk, points to an allocated 163 send_buffer struct */ 164 #endif 165 #ifdef USE_NGHTTP2 166 /*********** for HTTP/2 we store stream-local data here *************/ 167 int32_t stream_id; /* stream we are interested in */ 168 169 bool bodystarted; 170 /* We store non-final and final response headers here, per-stream */ 171 Curl_send_buffer *header_recvbuf; 172 size_t nread_header_recvbuf; /* number of bytes in header_recvbuf fed into 173 upper layer */ 174 Curl_send_buffer *trailer_recvbuf; 175 int status_code; /* HTTP status code */ 176 const uint8_t *pausedata; /* pointer to data received in on_data_chunk */ 177 size_t pauselen; /* the number of bytes left in data */ 178 bool closed; /* TRUE on HTTP2 stream close */ 179 bool close_handled; /* TRUE if stream closure is handled by libcurl */ 180 char *mem; /* points to a buffer in memory to store received data */ 181 size_t len; /* size of the buffer 'mem' points to */ 182 size_t memlen; /* size of data copied to mem */ 183 184 const uint8_t *upload_mem; /* points to a buffer to read from */ 185 size_t upload_len; /* size of the buffer 'upload_mem' points to */ 186 curl_off_t upload_left; /* number of bytes left to upload */ 187 188 char **push_headers; /* allocated array */ 189 size_t push_headers_used; /* number of entries filled in */ 190 size_t push_headers_alloc; /* number of entries allocated */ 191 #endif 192 }; 193 194 #ifdef USE_NGHTTP2 195 /* h2 settings for this connection */ 196 struct h2settings { 197 uint32_t max_concurrent_streams; 198 bool enable_push; 199 }; 200 #endif 201 202 struct http_conn { 203 #ifdef USE_NGHTTP2 204 #define H2_BINSETTINGS_LEN 80 205 nghttp2_session *h2; 206 uint8_t binsettings[H2_BINSETTINGS_LEN]; 207 size_t binlen; /* length of the binsettings data */ 208 Curl_send *send_underlying; /* underlying send Curl_send callback */ 209 Curl_recv *recv_underlying; /* underlying recv Curl_recv callback */ 210 char *inbuf; /* buffer to receive data from underlying socket */ 211 size_t inbuflen; /* number of bytes filled in inbuf */ 212 size_t nread_inbuf; /* number of bytes read from in inbuf */ 213 /* We need separate buffer for transmission and reception because we 214 may call nghttp2_session_send() after the 215 nghttp2_session_mem_recv() but mem buffer is still not full. In 216 this case, we wrongly sends the content of mem buffer if we share 217 them for both cases. */ 218 int32_t pause_stream_id; /* stream ID which paused 219 nghttp2_session_mem_recv */ 220 size_t drain_total; /* sum of all stream's UrlState.drain */ 221 222 /* this is a hash of all individual streams (Curl_easy structs) */ 223 struct h2settings settings; 224 225 /* list of settings that will be sent */ 226 nghttp2_settings_entry local_settings[3]; 227 size_t local_settings_num; 228 uint32_t error_code; /* HTTP/2 error code */ 229 #else 230 int unused; /* prevent a compiler warning */ 231 #endif 232 }; 233 234 CURLcode Curl_http_readwrite_headers(struct Curl_easy *data, 235 struct connectdata *conn, 236 ssize_t *nread, 237 bool *stop_reading); 238 239 /** 240 * Curl_http_output_auth() setups the authentication headers for the 241 * host/proxy and the correct authentication 242 * method. conn->data->state.authdone is set to TRUE when authentication is 243 * done. 244 * 245 * @param conn all information about the current connection 246 * @param request pointer to the request keyword 247 * @param path pointer to the requested path 248 * @param proxytunnel boolean if this is the request setting up a "proxy 249 * tunnel" 250 * 251 * @returns CURLcode 252 */ 253 CURLcode 254 Curl_http_output_auth(struct connectdata *conn, 255 const char *request, 256 const char *path, 257 bool proxytunnel); /* TRUE if this is the request setting 258 up the proxy tunnel */ 259 260 #endif /* HEADER_CURL_HTTP_H */ 261