1 #ifndef HEADER_CURL_REQUEST_H 2 #define HEADER_CURL_REQUEST_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 27 /* This file is for lib internal stuff */ 28 29 #include "curl_setup.h" 30 31 #include "bufq.h" 32 33 /* forward declarations */ 34 struct UserDefined; 35 #ifndef CURL_DISABLE_DOH 36 struct doh_probes; 37 #endif 38 39 enum expect100 { 40 EXP100_SEND_DATA, /* enough waiting, just send the body now */ 41 EXP100_AWAITING_CONTINUE, /* waiting for the 100 Continue header */ 42 EXP100_SENDING_REQUEST, /* still sending the request but will wait for 43 the 100 header once done with the request */ 44 EXP100_FAILED /* used on 417 Expectation Failed */ 45 }; 46 47 enum upgrade101 { 48 UPGR101_INIT, /* default state */ 49 UPGR101_WS, /* upgrade to WebSockets requested */ 50 UPGR101_H2, /* upgrade to HTTP/2 requested */ 51 UPGR101_RECEIVED, /* 101 response received */ 52 UPGR101_WORKING /* talking upgraded protocol */ 53 }; 54 55 56 /* 57 * Request specific data in the easy handle (Curl_easy). Previously, 58 * these members were on the connectdata struct but since a conn struct may 59 * now be shared between different Curl_easys, we store connection-specific 60 * data here. This struct only keeps stuff that is interesting for *this* 61 * request, as it will be cleared between multiple ones 62 */ 63 struct SingleRequest { 64 curl_off_t size; /* -1 if unknown at this point */ 65 curl_off_t maxdownload; /* in bytes, the maximum amount of data to fetch, 66 -1 means unlimited */ 67 curl_off_t bytecount; /* total number of bytes read */ 68 curl_off_t writebytecount; /* number of bytes written */ 69 70 struct curltime start; /* transfer started at this time */ 71 unsigned int headerbytecount; /* received server headers (not CONNECT 72 headers) */ 73 unsigned int allheadercount; /* all received headers (server + CONNECT) */ 74 unsigned int deductheadercount; /* this amount of bytes does not count when 75 we check if anything has been transferred 76 at the end of a connection. We use this 77 counter to make only a 100 reply (without 78 a following second response code) result 79 in a CURLE_GOT_NOTHING error code */ 80 int headerline; /* counts header lines to better track the 81 first one */ 82 curl_off_t offset; /* possible resume offset read from the 83 Content-Range: header */ 84 int httpversion; /* Version in response (09, 10, 11, etc.) */ 85 int httpcode; /* error code from the 'HTTP/1.? XXX' or 86 'RTSP/1.? XXX' line */ 87 int keepon; 88 enum upgrade101 upgr101; /* 101 upgrade state */ 89 90 /* Client Writer stack, handles transfer- and content-encodings, protocol 91 * checks, pausing by client callbacks. */ 92 struct Curl_cwriter *writer_stack; 93 /* Client Reader stack, handles transfer- and content-encodings, protocol 94 * checks, pausing by client callbacks. */ 95 struct Curl_creader *reader_stack; 96 struct bufq sendbuf; /* data which needs to be send to the server */ 97 size_t sendbuf_hds_len; /* amount of header bytes in sendbuf */ 98 time_t timeofdoc; 99 char *location; /* This points to an allocated version of the Location: 100 header data */ 101 char *newurl; /* Set to the new URL to use when a redirect or a retry is 102 wanted */ 103 104 /* Allocated protocol-specific data. Each protocol handler makes sure this 105 points to data it needs. */ 106 union { 107 struct FILEPROTO *file; 108 struct FTP *ftp; 109 struct IMAP *imap; 110 struct ldapreqinfo *ldap; 111 struct MQTT *mqtt; 112 struct POP3 *pop3; 113 struct RTSP *rtsp; 114 struct smb_request *smb; 115 struct SMTP *smtp; 116 struct SSHPROTO *ssh; 117 struct TELNET *telnet; 118 } p; 119 #ifndef CURL_DISABLE_DOH 120 struct doh_probes *doh; /* DoH specific data for this request */ 121 #endif 122 #ifndef CURL_DISABLE_COOKIES 123 unsigned char setcookies; 124 #endif 125 BIT(header); /* incoming data has HTTP header */ 126 BIT(done); /* request is done, e.g. no more send/recv should 127 * happen. This can be TRUE before `upload_done` or 128 * `download_done` is TRUE. */ 129 BIT(content_range); /* set TRUE if Content-Range: was found */ 130 BIT(download_done); /* set to TRUE when download is complete */ 131 BIT(eos_written); /* iff EOS has been written to client */ 132 BIT(eos_read); /* iff EOS has been read from the client */ 133 BIT(eos_sent); /* iff EOS has been sent to the server */ 134 BIT(rewind_read); /* iff reader needs rewind at next start */ 135 BIT(upload_done); /* set to TRUE when all request data has been sent */ 136 BIT(upload_aborted); /* set to TRUE when upload was aborted. Will also 137 * show `upload_done` as TRUE. */ 138 BIT(ignorebody); /* we read a response-body but we ignore it! */ 139 BIT(http_bodyless); /* HTTP response status code is between 100 and 199, 140 204 or 304 */ 141 BIT(chunk); /* if set, this is a chunked transfer-encoding */ 142 BIT(resp_trailer); /* response carried 'Trailer:' header field */ 143 BIT(ignore_cl); /* ignore content-length */ 144 BIT(upload_chunky); /* set TRUE if we are doing chunked transfer-encoding 145 on upload */ 146 BIT(getheader); /* TRUE if header parsing is wanted */ 147 BIT(no_body); /* the response has no body */ 148 BIT(authneg); /* TRUE when the auth phase has started, which means 149 that we are creating a request with an auth header, 150 but it is not the final request in the auth 151 negotiation. */ 152 BIT(sendbuf_init); /* sendbuf is initialized */ 153 BIT(shutdown); /* request end will shutdown connection */ 154 BIT(shutdown_err_ignore); /* errors in shutdown will not fail request */ 155 }; 156 157 /** 158 * Initialize the state of the request for first use. 159 */ 160 void Curl_req_init(struct SingleRequest *req); 161 162 /** 163 * The request is about to start. Record time and do a soft reset. 164 */ 165 CURLcode Curl_req_start(struct SingleRequest *req, 166 struct Curl_easy *data); 167 168 /** 169 * The request may continue with a follow up. Reset 170 * members, but keep start time for overall duration calc. 171 */ 172 CURLcode Curl_req_soft_reset(struct SingleRequest *req, 173 struct Curl_easy *data); 174 175 /** 176 * The request is done. If not aborted, make sure that buffers are 177 * flushed to the client. 178 * @param req the request 179 * @param data the transfer 180 * @param aborted TRUE iff the request was aborted/errored 181 */ 182 CURLcode Curl_req_done(struct SingleRequest *req, 183 struct Curl_easy *data, bool aborted); 184 185 /** 186 * Free the state of the request, not usable afterwards. 187 */ 188 void Curl_req_free(struct SingleRequest *req, struct Curl_easy *data); 189 190 /** 191 * Hard reset the state of the request to virgin state base on 192 * transfer settings. 193 */ 194 void Curl_req_hard_reset(struct SingleRequest *req, struct Curl_easy *data); 195 196 /** 197 * Send request headers. If not all could be sent 198 * they will be buffered. Use `Curl_req_flush()` to make sure 199 * bytes are really send. 200 * @param data the transfer making the request 201 * @param buf the complete header bytes, no body 202 * @return CURLE_OK (on blocking with *pnwritten == 0) or error. 203 */ 204 CURLcode Curl_req_send(struct Curl_easy *data, struct dynbuf *buf); 205 206 /** 207 * TRUE iff the request has sent all request headers and data. 208 */ 209 bool Curl_req_done_sending(struct Curl_easy *data); 210 211 /* 212 * Read more from client and flush all buffered request bytes. 213 * @return CURLE_OK on success or the error on the sending. 214 * Never returns CURLE_AGAIN. 215 */ 216 CURLcode Curl_req_send_more(struct Curl_easy *data); 217 218 /** 219 * TRUE iff the request wants to send, e.g. has buffered bytes. 220 */ 221 bool Curl_req_want_send(struct Curl_easy *data); 222 223 /** 224 * TRUE iff the request has no buffered bytes yet to send. 225 */ 226 bool Curl_req_sendbuf_empty(struct Curl_easy *data); 227 228 /** 229 * Stop sending any more request data to the server. 230 * Will clear the send buffer and mark request sending as done. 231 */ 232 CURLcode Curl_req_abort_sending(struct Curl_easy *data); 233 234 /** 235 * Stop sending and receiving any more request data. 236 * Will abort sending if not done. 237 */ 238 CURLcode Curl_req_stop_send_recv(struct Curl_easy *data); 239 240 /** 241 * Invoked when all request data has been uploaded. 242 */ 243 CURLcode Curl_req_set_upload_done(struct Curl_easy *data); 244 245 #endif /* HEADER_CURL_REQUEST_H */ 246
