1 /***************************************************************************
3 * Project ___| | | | _ \| |
5 * | (__| |_| | _ <| |___
6 * \___|\___/|_| \_\_____|
8 * Copyright (C) 1998 - 2013, Daniel Stenberg, <daniel@haxx.se>, et al.
10 * This software is licensed as described in the file COPYING, which
11 * you should have received as part of this distribution. The terms
12 * are also available at http://curl.haxx.se/docs/copyright.html.
14 * You may opt to use, copy, modify, merge, publish, distribute and/or sell
15 * copies of the Software, and permit persons to whom the Software is
16 * furnished to do so, under the terms of the COPYING file.
18 * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
19 * KIND, either express or implied.
21 ***************************************************************************/
23 #include "curl_setup.h"
26 #define _MPRINTF_REPLACE
27 #include <curl/mprintf.h>
29 #include <nghttp2/nghttp2.h>
34 #include "curl_base64.h"
35 #include "curl_memory.h"
37 /* include memdebug.h last */
41 * Store nghttp2 version info in this buffer, Prefix with a space. Return
42 * total length written.
44 int Curl_http2_ver(char *p, size_t len)
46 nghttp2_info *h2 = nghttp2_version(0);
47 return snprintf(p, len, " nghttp2/%s", h2->version_str);
51 * The implementation of nghttp2_send_callback type. Here we write |data| with
52 * size |length| to the network and return the number of bytes actually
53 * written. See the documentation of nghttp2_send_callback for the details.
55 static ssize_t send_callback(nghttp2_session *h2,
56 const uint8_t *data, size_t length, int flags,
59 struct connectdata *conn = (struct connectdata *)userp;
62 Curl_write(conn, conn->sock[0], data, length, &written);
67 failf(conn->data, "Failed sending HTTP2 data");
68 return NGHTTP2_ERR_CALLBACK_FAILURE;
71 return NGHTTP2_ERR_WOULDBLOCK;
77 * The implementation of nghttp2_recv_callback type. Here we read data from
78 * the network and write them in |buf|. The capacity of |buf| is |length|
79 * bytes. Returns the number of bytes stored in |buf|. See the documentation
80 * of nghttp2_recv_callback for the details.
82 static ssize_t recv_callback(nghttp2_session *h2,
83 uint8_t *buf, size_t length, int flags,
86 struct connectdata *conn = (struct connectdata *)userp;
88 CURLcode rc = Curl_read(conn, conn->sock[0], (char *)buf, length, &nread);
93 failf(conn->data, "Failed recving HTTP2 data");
94 return NGHTTP2_ERR_CALLBACK_FAILURE;
97 return NGHTTP2_ERR_WOULDBLOCK;
103 * This is all callbacks nghttp2 calls
105 static const nghttp2_session_callbacks callbacks = {
123 * The HTTP2 settings we send in the Upgrade request
125 static nghttp2_settings_entry settings[] = {
126 { NGHTTP2_SETTINGS_MAX_CONCURRENT_STREAMS, 100 },
127 { NGHTTP2_SETTINGS_INITIAL_WINDOW_SIZE, NGHTTP2_INITIAL_WINDOW_SIZE },
131 * Append headers to ask for a HTTP1.1 to HTTP2 upgrade.
133 CURLcode Curl_http2_request(Curl_send_buffer *req,
134 struct connectdata *conn)
136 uint8_t binsettings[80];
142 if(!conn->proto.httpc.h2) {
143 /* The nghttp2 session is not yet setup, do it */
144 int rc = nghttp2_session_client_new(&conn->proto.httpc.h2,
147 failf(conn->data, "Couldn't initialize nghttp2!");
148 return CURLE_OUT_OF_MEMORY; /* most likely at least */
152 /* As long as we have a fixed set of settings, we don't have to dynamically
153 * figure out the base64 strings since it'll always be the same. However,
154 * the settings will likely not be fixed every time in the future.
157 /* this returns number of bytes it wrote */
158 binlen = nghttp2_pack_settings_payload(binsettings, settings,
159 sizeof(settings)/sizeof(settings[0]));
161 failf(conn->data, "nghttp2 unexpectedly failed on pack_settings_payload");
162 return CURLE_FAILED_INIT;
165 result = Curl_base64_encode(conn->data, (const char *)binsettings, binlen,
170 result = Curl_add_bufferf(req,
171 "Connection: Upgrade, HTTP2-Settings\r\n"
172 "Upgrade: HTTP/2.0\r\n"
173 "HTTP2-Settings: %s\r\n", base64);