1 #ifndef HEADER_CURL_HTTP_H 2 #define HEADER_CURL_HTTP_H 3 /*************************************************************************** 4 * _ _ ____ _ 5 * Project ___| | | | _ \| | 6 * / __| | | | |_) | | 7 * | (__| |_| | _ <| |___ 8 * \___|\___/|_| \_\_____| 9 * 10 * Copyright (C) 1998 - 2015, Daniel Stenberg, <daniel (at) 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_checkheaders(const struct connectdata *conn, 44 const char *thisheader); 45 char *Curl_copy_header_value(const char *header); 46 47 char *Curl_checkProxyheaders(const struct connectdata *conn, 48 const char *thisheader); 49 /* ------------------------------------------------------------------------- */ 50 /* 51 * The add_buffer series of functions are used to build one large memory chunk 52 * from repeated function invokes. Used so that the entire HTTP request can 53 * be sent in one go. 54 */ 55 struct Curl_send_buffer { 56 char *buffer; 57 size_t size_max; 58 size_t size_used; 59 }; 60 typedef struct Curl_send_buffer Curl_send_buffer; 61 62 Curl_send_buffer *Curl_add_buffer_init(void); 63 void Curl_add_buffer_free(Curl_send_buffer *buff); 64 CURLcode Curl_add_bufferf(Curl_send_buffer *in, const char *fmt, ...); 65 CURLcode Curl_add_buffer(Curl_send_buffer *in, const void *inptr, size_t size); 66 CURLcode Curl_add_buffer_send(Curl_send_buffer *in, 67 struct connectdata *conn, 68 long *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 78 /* protocol-specific functions set up to be called by the main engine */ 79 CURLcode Curl_http(struct connectdata *conn, bool *done); 80 CURLcode Curl_http_done(struct connectdata *, CURLcode, bool premature); 81 CURLcode Curl_http_connect(struct connectdata *conn, bool *done); 82 CURLcode Curl_http_setup_conn(struct connectdata *conn); 83 84 /* The following functions are defined in http_chunks.c */ 85 void Curl_httpchunk_init(struct connectdata *conn); 86 CHUNKcode Curl_httpchunk_read(struct connectdata *conn, char *datap, 87 ssize_t length, ssize_t *wrote); 88 89 /* These functions are in http.c */ 90 void Curl_http_auth_stage(struct Curl_easy *data, int stage); 91 CURLcode Curl_http_input_auth(struct connectdata *conn, bool proxy, 92 const char *auth); 93 CURLcode Curl_http_auth_act(struct connectdata *conn); 94 CURLcode Curl_http_perhapsrewind(struct connectdata *conn); 95 96 /* If only the PICKNONE bit is set, there has been a round-trip and we 97 selected to use no auth at all. Ie, we actively select no auth, as opposed 98 to not having one selected. The other CURLAUTH_* defines are present in the 99 public curl/curl.h header. */ 100 #define CURLAUTH_PICKNONE (1<<30) /* don't use auth */ 101 102 /* MAX_INITIAL_POST_SIZE indicates the number of bytes that will make the POST 103 data get included in the initial data chunk sent to the server. If the 104 data is larger than this, it will automatically get split up in multiple 105 system calls. 106 107 This value used to be fairly big (100K), but we must take into account that 108 if the server rejects the POST due for authentication reasons, this data 109 will always be uncondtionally sent and thus it may not be larger than can 110 always be afforded to send twice. 111 112 It must not be greater than 64K to work on VMS. 113 */ 114 #ifndef MAX_INITIAL_POST_SIZE 115 #define MAX_INITIAL_POST_SIZE (64*1024) 116 #endif 117 118 #ifndef TINY_INITIAL_POST_SIZE 119 #define TINY_INITIAL_POST_SIZE 1024 120 #endif 121 122 #endif /* CURL_DISABLE_HTTP */ 123 124 /**************************************************************************** 125 * HTTP unique setup 126 ***************************************************************************/ 127 struct HTTP { 128 struct FormData *sendit; 129 curl_off_t postsize; /* off_t to handle large file sizes */ 130 const char *postdata; 131 132 const char *p_pragma; /* Pragma: string */ 133 const char *p_accept; /* Accept: string */ 134 curl_off_t readbytecount; 135 curl_off_t writebytecount; 136 137 /* For FORM posting */ 138 struct Form form; 139 140 struct back { 141 curl_read_callback fread_func; /* backup storage for fread pointer */ 142 void *fread_in; /* backup storage for fread_in pointer */ 143 const char *postdata; 144 curl_off_t postsize; 145 } backup; 146 147 enum { 148 HTTPSEND_NADA, /* init */ 149 HTTPSEND_REQUEST, /* sending a request */ 150 HTTPSEND_BODY, /* sending body */ 151 HTTPSEND_LAST /* never use this */ 152 } sending; 153 154 void *send_buffer; /* used if the request couldn't be sent in one chunk, 155 points to an allocated send_buffer struct */ 156 157 #ifdef USE_NGHTTP2 158 /*********** for HTTP/2 we store stream-local data here *************/ 159 int32_t stream_id; /* stream we are interested in */ 160 161 bool bodystarted; 162 /* We store non-final and final response headers here, per-stream */ 163 Curl_send_buffer *header_recvbuf; 164 size_t nread_header_recvbuf; /* number of bytes in header_recvbuf fed into 165 upper layer */ 166 Curl_send_buffer *trailer_recvbuf; 167 int status_code; /* HTTP status code */ 168 const uint8_t *pausedata; /* pointer to data received in on_data_chunk */ 169 size_t pauselen; /* the number of bytes left in data */ 170 bool closed; /* TRUE on HTTP2 stream close */ 171 uint32_t error_code; /* HTTP/2 error code */ 172 173 char *mem; /* points to a buffer in memory to store received data */ 174 size_t len; /* size of the buffer 'mem' points to */ 175 size_t memlen; /* size of data copied to mem */ 176 177 const uint8_t *upload_mem; /* points to a buffer to read from */ 178 size_t upload_len; /* size of the buffer 'upload_mem' points to */ 179 curl_off_t upload_left; /* number of bytes left to upload */ 180 181 char **push_headers; /* allocated array */ 182 size_t push_headers_used; /* number of entries filled in */ 183 size_t push_headers_alloc; /* number of entries allocated */ 184 #endif 185 }; 186 187 typedef int (*sending)(void); /* Curl_send */ 188 typedef int (*recving)(void); /* Curl_recv */ 189 190 #ifdef USE_NGHTTP2 191 /* h2 settings for this connection */ 192 struct h2settings { 193 uint32_t max_concurrent_streams; 194 bool enable_push; 195 }; 196 #endif 197 198 199 struct http_conn { 200 #ifdef USE_NGHTTP2 201 #define H2_BINSETTINGS_LEN 80 202 nghttp2_session *h2; 203 uint8_t binsettings[H2_BINSETTINGS_LEN]; 204 size_t binlen; /* length of the binsettings data */ 205 sending send_underlying; /* underlying send Curl_send callback */ 206 recving recv_underlying; /* underlying recv Curl_recv callback */ 207 char *inbuf; /* buffer to receive data from underlying socket */ 208 size_t inbuflen; /* number of bytes filled in inbuf */ 209 size_t nread_inbuf; /* number of bytes read from in inbuf */ 210 /* We need separate buffer for transmission and reception because we 211 may call nghttp2_session_send() after the 212 nghttp2_session_mem_recv() but mem buffer is still not full. In 213 this case, we wrongly sends the content of mem buffer if we share 214 them for both cases. */ 215 int32_t pause_stream_id; /* stream ID which paused 216 nghttp2_session_mem_recv */ 217 size_t drain_total; /* sum of all stream's UrlState.drain */ 218 219 /* this is a hash of all individual streams (Curl_easy structs) */ 220 struct h2settings settings; 221 #else 222 int unused; /* prevent a compiler warning */ 223 #endif 224 }; 225 226 CURLcode Curl_http_readwrite_headers(struct Curl_easy *data, 227 struct connectdata *conn, 228 ssize_t *nread, 229 bool *stop_reading); 230 231 /** 232 * Curl_http_output_auth() setups the authentication headers for the 233 * host/proxy and the correct authentication 234 * method. conn->data->state.authdone is set to TRUE when authentication is 235 * done. 236 * 237 * @param conn all information about the current connection 238 * @param request pointer to the request keyword 239 * @param path pointer to the requested path 240 * @param proxytunnel boolean if this is the request setting up a "proxy 241 * tunnel" 242 * 243 * @returns CURLcode 244 */ 245 CURLcode 246 Curl_http_output_auth(struct connectdata *conn, 247 const char *request, 248 const char *path, 249 bool proxytunnel); /* TRUE if this is the request setting 250 up the proxy tunnel */ 251 252 #endif /* HEADER_CURL_HTTP_H */ 253 254
