1#ifndef HEADER_CURL_HTTP_H 2#define HEADER_CURL_HTTP_H 3/*************************************************************************** 4 * _ _ ____ _ 5 * Project ___| | | | _ \| | 6 * / __| | | | |_) | | 7 * | (__| |_| | _ <| |___ 8 * \___|\___/|_| \_\_____| 9 * 10 * Copyright (C) 1998 - 2014, 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 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 32extern const struct Curl_handler Curl_handler_http; 33 34#ifdef USE_SSL 35extern const struct Curl_handler Curl_handler_https; 36#endif 37 38/* Header specific functions */ 39bool 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 43char *Curl_checkheaders(const struct connectdata *conn, 44 const char *thisheader); 45char *Curl_copy_header_value(const char *header); 46 47char *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 */ 55struct Curl_send_buffer { 56 char *buffer; 57 size_t size_max; 58 size_t size_used; 59}; 60typedef struct Curl_send_buffer Curl_send_buffer; 61 62Curl_send_buffer *Curl_add_buffer_init(void); 63CURLcode Curl_add_bufferf(Curl_send_buffer *in, const char *fmt, ...); 64CURLcode Curl_add_buffer(Curl_send_buffer *in, const void *inptr, size_t size); 65CURLcode Curl_add_buffer_send(Curl_send_buffer *in, 66 struct connectdata *conn, 67 long *bytes_written, 68 size_t included_body_bytes, 69 int socketindex); 70 71CURLcode Curl_add_timecondition(struct SessionHandle *data, 72 Curl_send_buffer *buf); 73CURLcode Curl_add_custom_headers(struct connectdata *conn, 74 bool is_connect, 75 Curl_send_buffer *req_buffer); 76 77/* protocol-specific functions set up to be called by the main engine */ 78CURLcode Curl_http(struct connectdata *conn, bool *done); 79CURLcode Curl_http_done(struct connectdata *, CURLcode, bool premature); 80CURLcode Curl_http_connect(struct connectdata *conn, bool *done); 81CURLcode Curl_http_setup_conn(struct connectdata *conn); 82 83/* The following functions are defined in http_chunks.c */ 84void Curl_httpchunk_init(struct connectdata *conn); 85CHUNKcode Curl_httpchunk_read(struct connectdata *conn, char *datap, 86 ssize_t length, ssize_t *wrote); 87 88/* These functions are in http.c */ 89void Curl_http_auth_stage(struct SessionHandle *data, int stage); 90CURLcode Curl_http_input_auth(struct connectdata *conn, bool proxy, 91 const char *auth); 92CURLcode Curl_http_auth_act(struct connectdata *conn); 93CURLcode Curl_http_perhapsrewind(struct connectdata *conn); 94 95/* If only the PICKNONE bit is set, there has been a round-trip and we 96 selected to use no auth at all. Ie, we actively select no auth, as opposed 97 to not having one selected. The other CURLAUTH_* defines are present in the 98 public curl/curl.h header. */ 99#define CURLAUTH_PICKNONE (1<<30) /* don't use auth */ 100 101/* MAX_INITIAL_POST_SIZE indicates the number of bytes that will make the POST 102 data get included in the initial data chunk sent to the server. If the 103 data is larger than this, it will automatically get split up in multiple 104 system calls. 105 106 This value used to be fairly big (100K), but we must take into account that 107 if the server rejects the POST due for authentication reasons, this data 108 will always be uncondtionally sent and thus it may not be larger than can 109 always be afforded to send twice. 110 111 It must not be greater than 64K to work on VMS. 112*/ 113#ifndef MAX_INITIAL_POST_SIZE 114#define MAX_INITIAL_POST_SIZE (64*1024) 115#endif 116 117#ifndef TINY_INITIAL_POST_SIZE 118#define TINY_INITIAL_POST_SIZE 1024 119#endif 120 121#endif /* CURL_DISABLE_HTTP */ 122 123/**************************************************************************** 124 * HTTP unique setup 125 ***************************************************************************/ 126struct HTTP { 127 struct FormData *sendit; 128 curl_off_t postsize; /* off_t to handle large file sizes */ 129 const char *postdata; 130 131 const char *p_pragma; /* Pragma: string */ 132 const char *p_accept; /* Accept: string */ 133 curl_off_t readbytecount; 134 curl_off_t writebytecount; 135 136 /* For FORM posting */ 137 struct Form form; 138 139 struct back { 140 curl_read_callback fread_func; /* backup storage for fread pointer */ 141 void *fread_in; /* backup storage for fread_in pointer */ 142 const char *postdata; 143 curl_off_t postsize; 144 } backup; 145 146 enum { 147 HTTPSEND_NADA, /* init */ 148 HTTPSEND_REQUEST, /* sending a request */ 149 HTTPSEND_BODY, /* sending body */ 150 HTTPSEND_LAST /* never use this */ 151 } sending; 152 153 void *send_buffer; /* used if the request couldn't be sent in one chunk, 154 points to an allocated send_buffer struct */ 155}; 156 157typedef int (*sending)(void); /* Curl_send */ 158typedef int (*recving)(void); /* Curl_recv */ 159 160struct http_conn { 161#ifdef USE_NGHTTP2 162#define H2_BINSETTINGS_LEN 80 163 nghttp2_session *h2; 164 uint8_t binsettings[H2_BINSETTINGS_LEN]; 165 size_t binlen; /* length of the binsettings data */ 166 char *mem; /* points to a buffer in memory to store */ 167 size_t len; /* size of the buffer 'mem' points to */ 168 bool bodystarted; 169 sending send_underlying; /* underlying send Curl_send callback */ 170 recving recv_underlying; /* underlying recv Curl_recv callback */ 171 bool closed; /* TRUE on HTTP2 stream close */ 172 Curl_send_buffer *header_recvbuf; /* store response headers */ 173 size_t nread_header_recvbuf; /* number of bytes in header_recvbuf 174 fed into upper layer */ 175 int32_t stream_id; /* stream we are interested in */ 176 const uint8_t *data; /* pointer to data chunk, received in 177 on_data_chunk */ 178 size_t datalen; /* the number of bytes left in data */ 179 char *inbuf; /* buffer to receive data from underlying socket */ 180 /* We need separate buffer for transmission and reception because we 181 may call nghttp2_session_send() after the 182 nghttp2_session_mem_recv() but mem buffer is still not full. In 183 this case, we wrongly sends the content of mem buffer if we share 184 them for both cases. */ 185 const uint8_t *upload_mem; /* points to a buffer to read from */ 186 size_t upload_len; /* size of the buffer 'upload_mem' points to */ 187 size_t upload_left; /* number of bytes left to upload */ 188#else 189 int unused; /* prevent a compiler warning */ 190#endif 191}; 192 193CURLcode Curl_http_readwrite_headers(struct SessionHandle *data, 194 struct connectdata *conn, 195 ssize_t *nread, 196 bool *stop_reading); 197 198/** 199 * Curl_http_output_auth() setups the authentication headers for the 200 * host/proxy and the correct authentication 201 * method. conn->data->state.authdone is set to TRUE when authentication is 202 * done. 203 * 204 * @param conn all information about the current connection 205 * @param request pointer to the request keyword 206 * @param path pointer to the requested path 207 * @param proxytunnel boolean if this is the request setting up a "proxy 208 * tunnel" 209 * 210 * @returns CURLcode 211 */ 212CURLcode 213Curl_http_output_auth(struct connectdata *conn, 214 const char *request, 215 const char *path, 216 bool proxytunnel); /* TRUE if this is the request setting 217 up the proxy tunnel */ 218 219#endif /* HEADER_CURL_HTTP_H */ 220 221