261 lines
10 KiB
C
261 lines
10 KiB
C
#ifndef HEADER_CURL_HTTP_H
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#define HEADER_CURL_HTTP_H
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/***************************************************************************
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* _ _ ____ _
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* Project ___| | | | _ \| |
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* / __| | | | |_) | |
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* | (__| |_| | _ <| |___
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* \___|\___/|_| \_\_____|
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*
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* Copyright (C) 1998 - 2019, Daniel Stenberg, <daniel@haxx.se>, et al.
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*
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* This software is licensed as described in the file COPYING, which
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* you should have received as part of this distribution. The terms
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* are also available at https://curl.haxx.se/docs/copyright.html.
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*
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* You may opt to use, copy, modify, merge, publish, distribute and/or sell
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* copies of the Software, and permit persons to whom the Software is
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* furnished to do so, under the terms of the COPYING file.
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*
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* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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* KIND, either express or implied.
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*
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***************************************************************************/
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#include "curl_setup.h"
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#ifndef CURL_DISABLE_HTTP
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#ifdef USE_NGHTTP2
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#include <nghttp2/nghttp2.h>
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#endif
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extern const struct Curl_handler Curl_handler_http;
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#ifdef USE_SSL
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extern const struct Curl_handler Curl_handler_https;
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#endif
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/* Header specific functions */
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bool Curl_compareheader(const char *headerline, /* line to check */
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const char *header, /* header keyword _with_ colon */
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const char *content); /* content string to find */
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char *Curl_copy_header_value(const char *header);
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char *Curl_checkProxyheaders(const struct connectdata *conn,
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const char *thisheader);
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/* ------------------------------------------------------------------------- */
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/*
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* The add_buffer series of functions are used to build one large memory chunk
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* from repeated function invokes. Used so that the entire HTTP request can
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* be sent in one go.
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*/
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struct Curl_send_buffer {
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char *buffer;
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size_t size_max;
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size_t size_used;
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};
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typedef struct Curl_send_buffer Curl_send_buffer;
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Curl_send_buffer *Curl_add_buffer_init(void);
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void Curl_add_buffer_free(Curl_send_buffer **inp);
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CURLcode Curl_add_bufferf(Curl_send_buffer **inp, const char *fmt, ...)
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WARN_UNUSED_RESULT;
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CURLcode Curl_add_buffer(Curl_send_buffer **inp, const void *inptr,
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size_t size) WARN_UNUSED_RESULT;
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CURLcode Curl_add_buffer_send(Curl_send_buffer **inp,
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struct connectdata *conn,
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curl_off_t *bytes_written,
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size_t included_body_bytes,
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int socketindex);
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CURLcode Curl_add_timecondition(struct Curl_easy *data,
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Curl_send_buffer *buf);
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CURLcode Curl_add_custom_headers(struct connectdata *conn,
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bool is_connect,
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Curl_send_buffer *req_buffer);
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CURLcode Curl_http_compile_trailers(struct curl_slist *trailers,
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Curl_send_buffer *buffer,
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struct Curl_easy *handle);
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/* protocol-specific functions set up to be called by the main engine */
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CURLcode Curl_http(struct connectdata *conn, bool *done);
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CURLcode Curl_http_done(struct connectdata *, CURLcode, bool premature);
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CURLcode Curl_http_connect(struct connectdata *conn, bool *done);
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CURLcode Curl_http_setup_conn(struct connectdata *conn);
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/* The following functions are defined in http_chunks.c */
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void Curl_httpchunk_init(struct connectdata *conn);
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CHUNKcode Curl_httpchunk_read(struct connectdata *conn, char *datap,
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ssize_t length, ssize_t *wrote);
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/* These functions are in http.c */
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void Curl_http_auth_stage(struct Curl_easy *data, int stage);
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CURLcode Curl_http_input_auth(struct connectdata *conn, bool proxy,
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const char *auth);
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CURLcode Curl_http_auth_act(struct connectdata *conn);
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CURLcode Curl_http_perhapsrewind(struct connectdata *conn);
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/* If only the PICKNONE bit is set, there has been a round-trip and we
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selected to use no auth at all. Ie, we actively select no auth, as opposed
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to not having one selected. The other CURLAUTH_* defines are present in the
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public curl/curl.h header. */
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#define CURLAUTH_PICKNONE (1<<30) /* don't use auth */
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/* MAX_INITIAL_POST_SIZE indicates the number of bytes that will make the POST
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data get included in the initial data chunk sent to the server. If the
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data is larger than this, it will automatically get split up in multiple
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system calls.
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This value used to be fairly big (100K), but we must take into account that
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if the server rejects the POST due for authentication reasons, this data
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will always be unconditionally sent and thus it may not be larger than can
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always be afforded to send twice.
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It must not be greater than 64K to work on VMS.
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*/
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#ifndef MAX_INITIAL_POST_SIZE
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#define MAX_INITIAL_POST_SIZE (64*1024)
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#endif
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/* EXPECT_100_THRESHOLD is the request body size limit for when libcurl will
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* automatically add an "Expect: 100-continue" header in HTTP requests. When
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* the size is unknown, it will always add it.
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*
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*/
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#ifndef EXPECT_100_THRESHOLD
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#define EXPECT_100_THRESHOLD 1024
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#endif
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#endif /* CURL_DISABLE_HTTP */
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/****************************************************************************
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* HTTP unique setup
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***************************************************************************/
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struct HTTP {
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curl_mimepart *sendit;
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curl_off_t postsize; /* off_t to handle large file sizes */
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const char *postdata;
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const char *p_pragma; /* Pragma: string */
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const char *p_accept; /* Accept: string */
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/* For FORM posting */
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curl_mimepart form;
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struct back {
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curl_read_callback fread_func; /* backup storage for fread pointer */
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void *fread_in; /* backup storage for fread_in pointer */
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const char *postdata;
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curl_off_t postsize;
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} backup;
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enum {
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HTTPSEND_NADA, /* init */
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HTTPSEND_REQUEST, /* sending a request */
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HTTPSEND_BODY, /* sending body */
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HTTPSEND_LAST /* never use this */
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} sending;
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#ifndef CURL_DISABLE_HTTP
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Curl_send_buffer *send_buffer; /* used if the request couldn't be sent in
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one chunk, points to an allocated
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send_buffer struct */
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#endif
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#ifdef USE_NGHTTP2
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/*********** for HTTP/2 we store stream-local data here *************/
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int32_t stream_id; /* stream we are interested in */
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bool bodystarted;
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/* We store non-final and final response headers here, per-stream */
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Curl_send_buffer *header_recvbuf;
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size_t nread_header_recvbuf; /* number of bytes in header_recvbuf fed into
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upper layer */
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Curl_send_buffer *trailer_recvbuf;
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int status_code; /* HTTP status code */
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const uint8_t *pausedata; /* pointer to data received in on_data_chunk */
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size_t pauselen; /* the number of bytes left in data */
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bool closed; /* TRUE on HTTP2 stream close */
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bool close_handled; /* TRUE if stream closure is handled by libcurl */
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char *mem; /* points to a buffer in memory to store received data */
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size_t len; /* size of the buffer 'mem' points to */
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size_t memlen; /* size of data copied to mem */
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const uint8_t *upload_mem; /* points to a buffer to read from */
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size_t upload_len; /* size of the buffer 'upload_mem' points to */
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curl_off_t upload_left; /* number of bytes left to upload */
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char **push_headers; /* allocated array */
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size_t push_headers_used; /* number of entries filled in */
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size_t push_headers_alloc; /* number of entries allocated */
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#endif
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};
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#ifdef USE_NGHTTP2
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/* h2 settings for this connection */
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struct h2settings {
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uint32_t max_concurrent_streams;
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bool enable_push;
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};
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#endif
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struct http_conn {
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#ifdef USE_NGHTTP2
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#define H2_BINSETTINGS_LEN 80
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nghttp2_session *h2;
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uint8_t binsettings[H2_BINSETTINGS_LEN];
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size_t binlen; /* length of the binsettings data */
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Curl_send *send_underlying; /* underlying send Curl_send callback */
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Curl_recv *recv_underlying; /* underlying recv Curl_recv callback */
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char *inbuf; /* buffer to receive data from underlying socket */
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size_t inbuflen; /* number of bytes filled in inbuf */
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size_t nread_inbuf; /* number of bytes read from in inbuf */
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/* We need separate buffer for transmission and reception because we
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may call nghttp2_session_send() after the
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nghttp2_session_mem_recv() but mem buffer is still not full. In
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this case, we wrongly sends the content of mem buffer if we share
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them for both cases. */
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int32_t pause_stream_id; /* stream ID which paused
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nghttp2_session_mem_recv */
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size_t drain_total; /* sum of all stream's UrlState.drain */
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/* this is a hash of all individual streams (Curl_easy structs) */
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struct h2settings settings;
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/* list of settings that will be sent */
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nghttp2_settings_entry local_settings[3];
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size_t local_settings_num;
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uint32_t error_code; /* HTTP/2 error code */
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#else
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int unused; /* prevent a compiler warning */
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#endif
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};
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CURLcode Curl_http_readwrite_headers(struct Curl_easy *data,
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struct connectdata *conn,
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ssize_t *nread,
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bool *stop_reading);
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/**
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* Curl_http_output_auth() setups the authentication headers for the
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* host/proxy and the correct authentication
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* method. conn->data->state.authdone is set to TRUE when authentication is
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* done.
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*
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* @param conn all information about the current connection
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* @param request pointer to the request keyword
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* @param path pointer to the requested path
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* @param proxytunnel boolean if this is the request setting up a "proxy
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* tunnel"
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*
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* @returns CURLcode
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*/
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CURLcode
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Curl_http_output_auth(struct connectdata *conn,
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const char *request,
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const char *path,
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bool proxytunnel); /* TRUE if this is the request setting
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up the proxy tunnel */
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#endif /* HEADER_CURL_HTTP_H */
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