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 */
19 #include "http_recv.cmdline.h"
24 /** the output buffer size of the http receiver */
25 #define BUFSIZE (32 * 1024)
28 * the possible states of a http receiver node
32 enum http_recv_status {HTTP_CONNECTED, HTTP_SENT_GET_REQUEST, HTTP_STREAMING};
35 * data specific to the http receiver
37 * Each running instance of the http receiver reserves space for one such struct.
39 struct private_http_recv_data {
43 * the current status of the http receiver node
45 * It gets initialized to \p HTTP_CONNECTED by the open function of the
48 * \sa receiver::open, receiver_node.
50 enum http_recv_status status;
54 * the file descriptor used for receiving the http stream
56 * The pre_select function of the http receiver adds this file descriptor to
57 * the set of file decriptors which are checked for reading/writing (depending
58 * on the current status) by the select loop of the application (para_audiod or
61 * The post_select function of the http receiver uses \a fd, if ready, to
62 * establish the http connection, and updates \a status according to the new
63 * state of the connection. As soon as \a status is \p HTTP_STREAMING, \a fd is
64 * going to be only checked for reading. If data is available, it is read into
65 * the output buffer of the receiver node by post_select.
67 * \sa receiver::pre_select receiver::post_select receiver_node, http_recv_status
72 static void http_shutdown(void)
77 static char *make_request_msg(void)
79 char *ret, *hn = para_hostname();
80 ret = make_message("%s1.0\nHost: %s\nUser-Agent: para_recv/%s\n\n\n",
81 HTTP_GET_MSG, hn, PACKAGE_VERSION);
86 static void http_recv_pre_select(struct sched *s, struct task *t)
88 struct receiver_node *rn = container_of(t, struct receiver_node, task);
89 struct private_http_recv_data *phd = rn->private_data;
92 if (phd->status == HTTP_CONNECTED)
93 para_fd_set(phd->fd, &s->wfds, &s->max_fileno);
95 para_fd_set(phd->fd, &s->rfds, &s->max_fileno);
99 static void http_recv_post_select(struct sched *s, struct task *t)
101 struct receiver_node *rn = container_of(t, struct receiver_node, task);
102 struct private_http_recv_data *phd = rn->private_data;
104 if (rn->output_error && *rn->output_error < 0) {
105 t->error = *rn->output_error;
108 if (phd->status == HTTP_CONNECTED) {
110 if (!FD_ISSET(phd->fd, &s->wfds))
112 rq = make_request_msg();
113 PARA_INFO_LOG("sending http request\n");
114 t->error = send_va_buffer(phd->fd, "%s", rq);
117 phd->status = HTTP_SENT_GET_REQUEST;
120 if (!FD_ISSET(phd->fd, &s->rfds))
122 if (phd->status == HTTP_SENT_GET_REQUEST) {
123 t->error = recv_pattern(phd->fd, HTTP_OK_MSG, strlen(HTTP_OK_MSG));
125 PARA_INFO_LOG("received ok msg, streaming\n");
126 phd->status = HTTP_STREAMING;
130 if (rn->loaded >= BUFSIZE) {
131 t->error = -E_HTTP_RECV_OVERRUN;
134 t->error = recv_bin_buffer(phd->fd, rn->buf + rn->loaded,
135 BUFSIZE - rn->loaded);
137 rn->loaded += t->error;
141 t->error = -E_RECV_EOF;
144 static void http_recv_close(struct receiver_node *rn)
146 struct private_http_recv_data *phd = rn->private_data;
149 free(rn->private_data);
152 static void *http_recv_parse_config(int argc, char **argv)
154 struct http_recv_args_info *tmp = para_calloc(sizeof(struct http_recv_args_info));
156 if (!http_recv_cmdline_parser(argc, argv, tmp))
162 static int http_recv_open(struct receiver_node *rn)
164 struct private_http_recv_data *phd;
165 struct http_recv_args_info *conf = rn->conf;
166 int fd, ret = makesock(AF_UNSPEC, IPPROTO_TCP, 0, conf->host_arg,
172 ret = mark_fd_nonblocking(fd);
177 rn->buf = para_calloc(BUFSIZE);
178 rn->private_data = phd = para_calloc(sizeof(struct private_http_recv_data));
180 phd->status = HTTP_CONNECTED;
185 * the init function of the http receiver
187 * \param r pointer to the receiver struct to initialize
189 * Just initialize all function pointers of \a r.
191 void http_recv_init(struct receiver *r)
193 struct http_recv_args_info dummy;
195 http_recv_cmdline_parser_init(&dummy);
196 r->open = http_recv_open;
197 r->close = http_recv_close;
198 r->pre_select = http_recv_pre_select;
199 r->post_select = http_recv_post_select;
200 r->shutdown = http_shutdown;
201 r->parse_config = http_recv_parse_config;
202 r->help = (struct ggo_help) {
203 .short_help = http_recv_args_info_help,
204 .detailed_help = http_recv_args_info_detailed_help
206 http_recv_cmdline_parser_free(&dummy);