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 http://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 SessionHandle *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 SessionHandle *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 int status_code; /* HTTP status code */ 167 const uint8_t *pausedata; /* pointer to data received in on_data_chunk */ 168 size_t pauselen; /* the number of bytes left in data */ 169 bool closed; /* TRUE on HTTP2 stream close */ 170 uint32_t error_code; /* HTTP/2 error code */ 171 172 char *mem; /* points to a buffer in memory to store received data */ 173 size_t len; /* size of the buffer 'mem' points to */ 174 size_t memlen; /* size of data copied to mem */ 175 176 const uint8_t *upload_mem; /* points to a buffer to read from */ 177 size_t upload_len; /* size of the buffer 'upload_mem' points to */ 178 curl_off_t upload_left; /* number of bytes left to upload */ 179 #endif 180 }; 181 182 typedef int (*sending)(void); /* Curl_send */ 183 typedef int (*recving)(void); /* Curl_recv */ 184 185 #ifdef USE_NGHTTP2 186 /* h2 settings for this connection */ 187 struct h2settings { 188 uint32_t max_concurrent_streams; 189 bool enable_push; 190 }; 191 #endif 192 193 194 struct http_conn { 195 #ifdef USE_NGHTTP2 196 #define H2_BINSETTINGS_LEN 80 197 nghttp2_session *h2; 198 uint8_t binsettings[H2_BINSETTINGS_LEN]; 199 size_t binlen; /* length of the binsettings data */ 200 sending send_underlying; /* underlying send Curl_send callback */ 201 recving recv_underlying; /* underlying recv Curl_recv callback */ 202 char *inbuf; /* buffer to receive data from underlying socket */ 203 size_t inbuflen; /* number of bytes filled in inbuf */ 204 size_t nread_inbuf; /* number of bytes read from in inbuf */ 205 /* We need separate buffer for transmission and reception because we 206 may call nghttp2_session_send() after the 207 nghttp2_session_mem_recv() but mem buffer is still not full. In 208 this case, we wrongly sends the content of mem buffer if we share 209 them for both cases. */ 210 int32_t pause_stream_id; /* stream ID which paused 211 nghttp2_session_mem_recv */ 212 213 /* this is a hash of all individual streams (SessionHandle structs) */ 214 struct curl_hash streamsh; 215 struct h2settings settings; 216 #else 217 int unused; /* prevent a compiler warning */ 218 #endif 219 }; 220 221 CURLcode Curl_http_readwrite_headers(struct SessionHandle *data, 222 struct connectdata *conn, 223 ssize_t *nread, 224 bool *stop_reading); 225 226 /** 227 * Curl_http_output_auth() setups the authentication headers for the 228 * host/proxy and the correct authentication 229 * method. conn->data->state.authdone is set to TRUE when authentication is 230 * done. 231 * 232 * @param conn all information about the current connection 233 * @param request pointer to the request keyword 234 * @param path pointer to the requested path 235 * @param proxytunnel boolean if this is the request setting up a "proxy 236 * tunnel" 237 * 238 * @returns CURLcode 239 */ 240 CURLcode 241 Curl_http_output_auth(struct connectdata *conn, 242 const char *request, 243 const char *path, 244 bool proxytunnel); /* TRUE if this is the request setting 245 up the proxy tunnel */ 246 247 #endif /* HEADER_CURL_HTTP_H */ 248 249
