2 * Copyright (C) 2005-2007 Andre Noll <maan@systemlinux.org>
4 * Licensed under the GPL v2. For licencing details see COPYING.
7 /** \file http_recv.c paraslash's http receiver */
15 #include "http_recv.cmdline.h"
21 /** the output buffer size of the http receiver */
22 #define BUFSIZE (32 * 1024)
25 * the possible states of a http receiver node
29 enum http_recv_status {HTTP_CONNECTED, HTTP_SENT_GET_REQUEST, HTTP_STREAMING};
32 * data specific to the http receiver
34 * Each running instance of the http receiver reserves space for one such struct.
36 struct private_http_recv_data {
40 * the current status of the http receiver node
42 * It gets initialized to \p HTTP_CONNECTED by the open function of the
45 * \sa receiver::open, receiver_node.
47 enum http_recv_status status;
51 * the file descriptor used for receiving the http stream
53 * The pre_select function of the http receiver adds this file descriptor to
54 * the set of file decriptors which are checked for reading/writing (depending
55 * on the current status) by the select loop of the application (para_audiod or
58 * The post_select function of the http receiver uses \a fd, if ready, to
59 * establish the http connection, and updates \a status according to the new
60 * state of the connection. As soon as \a status is \p HTTP_STREAMING, \a fd is
61 * going to be only checked for reading. If data is available, it is read into
62 * the output buffer of the receiver node by post_select.
64 * \sa receiver::pre_select receiver::post_select receiver_node, http_recv_status
69 static void http_shutdown(void)
74 static char *make_request_msg(void)
76 char *ret, *hn = para_hostname();
77 ret = make_message("%s1.0\nHost: %s\nUser-Agent: para_recv/%s\n\n\n",
78 HTTP_GET_MSG, hn, PACKAGE_VERSION);
83 static void http_recv_pre_select(struct sched *s, struct task *t)
85 struct receiver_node *rn = t->private_data;
86 struct private_http_recv_data *phd = rn->private_data;
89 if (phd->status == HTTP_CONNECTED)
90 para_fd_set(phd->fd, &s->wfds, &s->max_fileno);
92 para_fd_set(phd->fd, &s->rfds, &s->max_fileno);
96 static void http_recv_post_select(struct sched *s, struct task *t)
98 struct receiver_node *rn = t->private_data;
99 struct private_http_recv_data *phd = rn->private_data;
101 t->ret = -E_HTTP_RECV_EOF;
102 if (rn->output_eof && *rn->output_eof)
107 if (phd->status == HTTP_CONNECTED) {
109 if (!FD_ISSET(phd->fd, &s->wfds))
111 rq = make_request_msg();
112 PARA_INFO_LOG("%s", "sending http request\n");
113 t->ret = send_va_buffer(phd->fd, "%s", rq);
116 phd->status = HTTP_SENT_GET_REQUEST;
119 if (!FD_ISSET(phd->fd, &s->rfds))
121 if (phd->status == HTTP_SENT_GET_REQUEST) {
122 t->ret = recv_pattern(phd->fd, HTTP_OK_MSG, MAXLINE);
125 PARA_INFO_LOG("%s", "received ok msg, streaming\n");
127 phd->status = HTTP_STREAMING;
130 t->ret = -E_HTTP_RECV_OVERRUN;
131 if (rn->loaded >= BUFSIZE)
133 t->ret = recv_bin_buffer(phd->fd, rn->buf + rn->loaded,
134 BUFSIZE - rn->loaded);
137 t->ret = -E_HTTP_RECV_EOF;
140 rn->loaded += t->ret;
146 static void http_recv_close(struct receiver_node *rn)
148 struct private_http_recv_data *phd = rn->private_data;
151 free(rn->private_data);
154 static void *http_recv_parse_config(int argc, char **argv)
156 struct http_recv_args_info *tmp = para_calloc(sizeof(struct http_recv_args_info));
158 if (!http_recv_cmdline_parser(argc, argv, tmp))
164 static int http_recv_open(struct receiver_node *rn)
166 struct private_http_recv_data *phd;
168 struct http_recv_args_info *conf = rn->conf;
169 struct sockaddr_in their_addr;
172 rn->buf = para_calloc(BUFSIZE);
173 rn->private_data = para_calloc(sizeof(struct private_http_recv_data));
174 phd = rn->private_data;
175 ret = get_host_info(conf->host_arg, &he);
178 ret = get_stream_socket(AF_INET);
182 /* init their_addr */
183 init_sockaddr(&their_addr, conf->port_arg, he);
185 PARA_NOTICE_LOG("connecting to %s:%d\n", conf->host_arg,
187 ret = para_connect(phd->fd, &their_addr);
192 mark_fd_nonblock(phd->fd);
193 phd->status = HTTP_CONNECTED;
196 free(rn->private_data);
202 * the init function of the http receiver
204 * \param r pointer to the receiver struct to initialize
206 * Just initialize all function pointers of \a r.
208 void http_recv_init(struct receiver *r)
210 r->open = http_recv_open;
211 r->close = http_recv_close;
212 r->pre_select = http_recv_pre_select;
213 r->post_select = http_recv_post_select;
214 r->shutdown = http_shutdown;
215 r->parse_config = http_recv_parse_config;