2 * Copyright (C) 2005-2008 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 */
18 #include "http_recv.cmdline.h"
23 /** the output buffer size of the http receiver */
24 #define BUFSIZE (32 * 1024)
27 * the possible states of a http receiver node
31 enum http_recv_status {HTTP_CONNECTED, HTTP_SENT_GET_REQUEST, HTTP_STREAMING};
34 * data specific to the http receiver
36 * Each running instance of the http receiver reserves space for one such struct.
38 struct private_http_recv_data {
42 * the current status of the http receiver node
44 * It gets initialized to \p HTTP_CONNECTED by the open function of the
47 * \sa receiver::open, receiver_node.
49 enum http_recv_status status;
53 * the file descriptor used for receiving the http stream
55 * The pre_select function of the http receiver adds this file descriptor to
56 * the set of file decriptors which are checked for reading/writing (depending
57 * on the current status) by the select loop of the application (para_audiod or
60 * The post_select function of the http receiver uses \a fd, if ready, to
61 * establish the http connection, and updates \a status according to the new
62 * state of the connection. As soon as \a status is \p HTTP_STREAMING, \a fd is
63 * going to be only checked for reading. If data is available, it is read into
64 * the output buffer of the receiver node by post_select.
66 * \sa receiver::pre_select receiver::post_select receiver_node, http_recv_status
71 static void http_shutdown(void)
76 static char *make_request_msg(void)
78 char *ret, *hn = para_hostname();
79 ret = make_message("%s1.0\nHost: %s\nUser-Agent: para_recv/%s\n\n\n",
80 HTTP_GET_MSG, hn, PACKAGE_VERSION);
85 static void http_recv_pre_select(struct sched *s, struct task *t)
87 struct receiver_node *rn = t->private_data;
88 struct private_http_recv_data *phd = rn->private_data;
91 if (phd->status == HTTP_CONNECTED)
92 para_fd_set(phd->fd, &s->wfds, &s->max_fileno);
94 para_fd_set(phd->fd, &s->rfds, &s->max_fileno);
98 static void http_recv_post_select(struct sched *s, struct task *t)
100 struct receiver_node *rn = t->private_data;
101 struct private_http_recv_data *phd = rn->private_data;
103 if (rn->output_error && *rn->output_error) {
104 t->ret = *rn->output_error;
110 if (phd->status == HTTP_CONNECTED) {
112 if (!FD_ISSET(phd->fd, &s->wfds))
114 rq = make_request_msg();
115 PARA_INFO_LOG("%s", "sending http request\n");
116 t->ret = send_va_buffer(phd->fd, "%s", rq);
119 phd->status = HTTP_SENT_GET_REQUEST;
122 if (!FD_ISSET(phd->fd, &s->rfds))
124 if (phd->status == HTTP_SENT_GET_REQUEST) {
125 t->ret = recv_pattern(phd->fd, HTTP_OK_MSG, MAXLINE);
128 PARA_INFO_LOG("%s", "received ok msg, streaming\n");
130 phd->status = HTTP_STREAMING;
133 t->ret = -E_HTTP_RECV_OVERRUN;
134 if (rn->loaded >= BUFSIZE)
136 t->ret = recv_bin_buffer(phd->fd, rn->buf + rn->loaded,
137 BUFSIZE - rn->loaded);
140 t->ret = -E_RECV_EOF;
143 rn->loaded += t->ret;
149 static void http_recv_close(struct receiver_node *rn)
151 struct private_http_recv_data *phd = rn->private_data;
154 free(rn->private_data);
157 static void *http_recv_parse_config(int argc, char **argv)
159 struct http_recv_args_info *tmp = para_calloc(sizeof(struct http_recv_args_info));
161 if (!http_recv_cmdline_parser(argc, argv, tmp))
167 static int http_recv_open(struct receiver_node *rn)
169 struct private_http_recv_data *phd;
170 struct http_recv_args_info *conf = rn->conf;
171 int ret = makesock(AF_UNSPEC, IPPROTO_TCP, 0, conf->host_arg, conf->port_arg);
176 rn->buf = para_calloc(BUFSIZE);
177 rn->private_data = phd = para_calloc(sizeof(struct private_http_recv_data));
180 mark_fd_nonblocking(phd->fd);
181 phd->status = HTTP_CONNECTED;
186 * the init function of the http receiver
188 * \param r pointer to the receiver struct to initialize
190 * Just initialize all function pointers of \a r.
192 void http_recv_init(struct receiver *r)
194 r->open = http_recv_open;
195 r->close = http_recv_close;
196 r->pre_select = http_recv_pre_select;
197 r->post_select = http_recv_post_select;
198 r->shutdown = http_shutdown;
199 r->parse_config = http_recv_parse_config;