source: UsbWattMeter/trunk/curl-7.47.1/lib/http.h@ 164

Last change on this file since 164 was 164, checked in by coas-nagasima, 6 years ago

TOPPERS/ECNLサンプルアプリ「USB充電器電力計」を追加

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File size: 9.5 KB
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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@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
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);
63void Curl_add_buffer_free(Curl_send_buffer *buff);
64CURLcode Curl_add_bufferf(Curl_send_buffer *in, const char *fmt, ...);
65CURLcode Curl_add_buffer(Curl_send_buffer *in, const void *inptr, size_t size);
66CURLcode 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
72CURLcode Curl_add_timecondition(struct SessionHandle *data,
73 Curl_send_buffer *buf);
74CURLcode 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 */
79CURLcode Curl_http(struct connectdata *conn, bool *done);
80CURLcode Curl_http_done(struct connectdata *, CURLcode, bool premature);
81CURLcode Curl_http_connect(struct connectdata *conn, bool *done);
82CURLcode Curl_http_setup_conn(struct connectdata *conn);
83
84/* The following functions are defined in http_chunks.c */
85void Curl_httpchunk_init(struct connectdata *conn);
86CHUNKcode Curl_httpchunk_read(struct connectdata *conn, char *datap,
87 ssize_t length, ssize_t *wrote);
88
89/* These functions are in http.c */
90void Curl_http_auth_stage(struct SessionHandle *data, int stage);
91CURLcode Curl_http_input_auth(struct connectdata *conn, bool proxy,
92 const char *auth);
93CURLcode Curl_http_auth_act(struct connectdata *conn);
94CURLcode 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 ***************************************************************************/
127struct 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
187typedef int (*sending)(void); /* Curl_send */
188typedef int (*recving)(void); /* Curl_recv */
189
190#ifdef USE_NGHTTP2
191/* h2 settings for this connection */
192struct h2settings {
193 uint32_t max_concurrent_streams;
194 bool enable_push;
195};
196#endif
197
198
199struct 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
218 /* this is a hash of all individual streams (SessionHandle structs) */
219 struct h2settings settings;
220#else
221 int unused; /* prevent a compiler warning */
222#endif
223};
224
225CURLcode Curl_http_readwrite_headers(struct SessionHandle *data,
226 struct connectdata *conn,
227 ssize_t *nread,
228 bool *stop_reading);
229
230/**
231 * Curl_http_output_auth() setups the authentication headers for the
232 * host/proxy and the correct authentication
233 * method. conn->data->state.authdone is set to TRUE when authentication is
234 * done.
235 *
236 * @param conn all information about the current connection
237 * @param request pointer to the request keyword
238 * @param path pointer to the requested path
239 * @param proxytunnel boolean if this is the request setting up a "proxy
240 * tunnel"
241 *
242 * @returns CURLcode
243 */
244CURLcode
245Curl_http_output_auth(struct connectdata *conn,
246 const char *request,
247 const char *path,
248 bool proxytunnel); /* TRUE if this is the request setting
249 up the proxy tunnel */
250
251#endif /* HEADER_CURL_HTTP_H */
252
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