2 * Copyright (C) 2005-2009 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 */
10 #include <sys/types.h>
20 #include "http_recv.cmdline.h"
25 /** the output buffer size of the http receiver */
26 #define BUFSIZE (32 * 1024)
29 * the possible states of a http receiver node
33 enum http_recv_status {HTTP_CONNECTED, HTTP_SENT_GET_REQUEST, HTTP_STREAMING};
36 * data specific to the http receiver
38 * Each running instance of the http receiver reserves space for one such struct.
40 struct private_http_recv_data {
44 * the current status of the http receiver node
46 * It gets initialized to \p HTTP_CONNECTED by the open function of the
49 * \sa receiver::open, receiver_node.
51 enum http_recv_status status;
55 * the file descriptor used for receiving the http stream
57 * The pre_select function of the http receiver adds this file descriptor to
58 * the set of file decriptors which are checked for reading/writing (depending
59 * on the current status) by the select loop of the application (para_audiod or
62 * The post_select function of the http receiver uses \a fd, if ready, to
63 * establish the http connection, and updates \a status according to the new
64 * state of the connection. As soon as \a status is \p HTTP_STREAMING, \a fd is
65 * going to be only checked for reading. If data is available, it is read into
66 * the output buffer of the receiver node by post_select.
68 * \sa receiver::pre_select receiver::post_select receiver_node, http_recv_status
73 static void http_shutdown(void)
78 static char *make_request_msg(void)
80 char *ret, *hn = para_hostname();
81 ret = make_message("%s1.0\nHost: %s\nUser-Agent: para_recv/%s\n\n\n",
82 HTTP_GET_MSG, hn, PACKAGE_VERSION);
87 static void http_recv_pre_select(struct sched *s, struct task *t)
89 struct receiver_node *rn = container_of(t, struct receiver_node, task);
90 struct private_http_recv_data *phd = rn->private_data;
93 if (phd->status == HTTP_CONNECTED)
94 para_fd_set(phd->fd, &s->wfds, &s->max_fileno);
96 para_fd_set(phd->fd, &s->rfds, &s->max_fileno);
100 static void http_recv_post_select(struct sched *s, struct task *t)
102 struct receiver_node *rn = container_of(t, struct receiver_node, task);
103 struct private_http_recv_data *phd = rn->private_data;
105 if (rn->output_error && *rn->output_error < 0) {
106 t->error = *rn->output_error;
109 if (phd->status == HTTP_CONNECTED) {
111 if (!FD_ISSET(phd->fd, &s->wfds))
113 rq = make_request_msg();
114 PARA_INFO_LOG("sending http request\n");
115 t->error = send_va_buffer(phd->fd, "%s", rq);
118 phd->status = HTTP_SENT_GET_REQUEST;
121 if (!FD_ISSET(phd->fd, &s->rfds))
123 if (phd->status == HTTP_SENT_GET_REQUEST) {
124 t->error = recv_pattern(phd->fd, HTTP_OK_MSG, strlen(HTTP_OK_MSG));
126 PARA_INFO_LOG("received ok msg, streaming\n");
127 phd->status = HTTP_STREAMING;
131 if (rn->loaded >= BUFSIZE) {
132 t->error = -E_HTTP_RECV_OVERRUN;
135 t->error = recv_bin_buffer(phd->fd, rn->buf + rn->loaded,
136 BUFSIZE - rn->loaded);
138 rn->loaded += t->error;
142 t->error = -E_RECV_EOF;
145 static void http_recv_close(struct receiver_node *rn)
147 struct private_http_recv_data *phd = rn->private_data;
150 free(rn->private_data);
153 static void *http_recv_parse_config(int argc, char **argv)
155 struct http_recv_args_info *tmp = para_calloc(sizeof(struct http_recv_args_info));
157 if (!http_recv_cmdline_parser(argc, argv, tmp))
163 static int http_recv_open(struct receiver_node *rn)
165 struct private_http_recv_data *phd;
166 struct http_recv_args_info *conf = rn->conf;
167 int fd, ret = makesock(AF_UNSPEC, IPPROTO_TCP, 0, conf->host_arg,
173 ret = mark_fd_nonblocking(fd);
178 rn->buf = para_calloc(BUFSIZE);
179 rn->private_data = phd = para_calloc(sizeof(struct private_http_recv_data));
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 struct http_recv_args_info dummy;
196 http_recv_cmdline_parser_init(&dummy);
197 r->open = http_recv_open;
198 r->close = http_recv_close;
199 r->pre_select = http_recv_pre_select;
200 r->post_select = http_recv_post_select;
201 r->shutdown = http_shutdown;
202 r->parse_config = http_recv_parse_config;
203 r->help = (struct ggo_help) {
204 .short_help = http_recv_args_info_help,
205 .detailed_help = http_recv_args_info_detailed_help
207 http_recv_cmdline_parser_free(&dummy);