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/* $Id$ */
/***
This file is part of polypaudio.
polypaudio is free software; you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published
by the Free Software Foundation; either version 2 of the License,
or (at your option) any later version.
polypaudio is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
General Public License for more details.
You should have received a copy of the GNU Lesser General Public License
along with polypaudio; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
USA.
***/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <assert.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <polypcore/ioline.h>
#include <polypcore/xmalloc.h>
#include <polypcore/log.h>
#include <polypcore/namereg.h>
#include <polypcore/cli-text.h>
#include "protocol-http.h"
/* Don't allow more than this many concurrent connections */
#define MAX_CONNECTIONS 10
#define internal_server_error(c) http_message((c), 500, "Internal Server Error", NULL)
#define URL_ROOT "/"
#define URL_CSS "/style"
#define URL_STATUS "/status"
struct connection {
pa_protocol_http *protocol;
pa_ioline *line;
enum { REQUEST_LINE, MIME_HEADER, DATA } state;
char *url;
};
struct pa_protocol_http {
pa_module *module;
pa_core *core;
pa_socket_server*server;
pa_idxset *connections;
};
static void http_response(struct connection *c, int code, const char *msg, const char *mime) {
char s[256];
assert(c);
assert(msg);
assert(mime);
snprintf(s, sizeof(s),
"HTTP/1.0 %i %s\n"
"Connection: close\n"
"Content-Type: %s\n"
"Cache-Control: no-cache\n"
"Expires: 0\n"
"Server: "PACKAGE_NAME"/"PACKAGE_VERSION"\n"
"\n", code, msg, mime);
pa_ioline_puts(c->line, s);
}
static void http_message(struct connection *c, int code, const char *msg, const char *text) {
char s[256];
assert(c);
http_response(c, code, msg, "text/html");
if (!text)
text = msg;
snprintf(s, sizeof(s),
"<?xml version=\"1.0\"?>\n"
"<!DOCTYPE html PUBLIC \"-//W3C//DTD XHTML 1.0 Strict//EN\" \"http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd\">\n"
"<html xmlns=\"http://www.w3.org/1999/xhtml\"><head><title>%s</title></head>\n"
"<body>%s</body></html>\n",
text, text);
pa_ioline_puts(c->line, s);
pa_ioline_defer_close(c->line);
}
static void connection_free(struct connection *c, int del) {
assert(c);
if (c->url)
pa_xfree(c->url);
if (del)
pa_idxset_remove_by_data(c->protocol->connections, c, NULL);
pa_ioline_unref(c->line);
pa_xfree(c);
}
static void line_callback(pa_ioline *line, const char *s, void *userdata) {
struct connection *c = userdata;
assert(line);
assert(c);
if (!s) {
/* EOF */
connection_free(c, 1);
return;
}
switch (c->state) {
case REQUEST_LINE: {
if (memcmp(s, "GET ", 4))
goto fail;
s +=4;
c->url = pa_xstrndup(s, strcspn(s, " \r\n\t?"));
c->state = MIME_HEADER;
break;
}
case MIME_HEADER: {
/* Ignore MIME headers */
if (strcspn(s, " \r\n") != 0)
break;
/* We're done */
c->state = DATA;
pa_log_info(__FILE__": request for %s\n", c->url);
if (!strcmp(c->url, URL_ROOT)) {
char txt[256];
http_response(c, 200, "OK", "text/html");
pa_ioline_puts(c->line,
"<?xml version=\"1.0\"?>\n"
"<!DOCTYPE html PUBLIC \"-//W3C//DTD XHTML 1.0 Strict//EN\" \"http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd\">\n"
"<html xmlns=\"http://www.w3.org/1999/xhtml\"><title>"PACKAGE_NAME" "PACKAGE_VERSION"</title>\n"
"<link rel=\"stylesheet\" type=\"text/css\" href=\"style\"/></head><body>\n");
pa_ioline_puts(c->line,
"<h1>"PACKAGE_NAME" "PACKAGE_VERSION"</h1>\n"
"<table>");
#define PRINTF_FIELD(a,b) pa_ioline_printf(c->line, "<tr><td><b>%s</b></td><td>%s</td></tr>\n",(a),(b))
PRINTF_FIELD("User Name:", pa_get_user_name(txt, sizeof(txt)));
PRINTF_FIELD("Fully Qualified Domain Name:", pa_get_fqdn(txt, sizeof(txt)));
PRINTF_FIELD("Default Sample Specification:", pa_sample_spec_snprint(txt, sizeof(txt), &c->protocol->core->default_sample_spec));
PRINTF_FIELD("Default Sink:", pa_namereg_get_default_sink_name(c->protocol->core));
PRINTF_FIELD("Default Source:", pa_namereg_get_default_source_name(c->protocol->core));
pa_ioline_puts(c->line, "</table>");
pa_ioline_puts(c->line, "<p><a href=\"/status\">Click here</a> for an extensive server status report.</p>");
pa_ioline_puts(c->line, "</body></html>\n");
pa_ioline_defer_close(c->line);
} else if (!strcmp(c->url, URL_CSS)) {
http_response(c, 200, "OK", "text/css");
pa_ioline_puts(c->line,
"body { color: black; background-color: white; margin: 0.5cm; }\n"
"a:link, a:visited { color: #900000; }\n"
"p { margin-left: 0.5cm; margin-right: 0.5cm; }\n"
"h1 { color: #00009F; }\n"
"h2 { color: #00009F; }\n"
"ul { margin-left: .5cm; }\n"
"ol { margin-left: .5cm; }\n"
"pre { margin-left: .5cm; background-color: #f0f0f0; padding: 0.4cm;}\n"
".grey { color: #afafaf; }\n"
"table { margin-left: 1cm; border:1px solid lightgrey; padding: 0.2cm; }\n"
"td { padding-left:10px; padding-right:10px; }\n");
pa_ioline_defer_close(c->line);
} else if (!strcmp(c->url, URL_STATUS)) {
char *r;
http_response(c, 200, "OK", "text/plain");
r = pa_full_status_string(c->protocol->core);
pa_ioline_puts(c->line, r);
pa_xfree(r);
pa_ioline_defer_close(c->line);
} else
http_message(c, 404, "Not Found", NULL);
break;
}
default:
;
}
return;
fail:
internal_server_error(c);
}
static void on_connection(pa_socket_server*s, pa_iochannel *io, void *userdata) {
pa_protocol_http *p = userdata;
struct connection *c;
assert(s && io && p);
if (pa_idxset_size(p->connections)+1 > MAX_CONNECTIONS) {
pa_log_warn(__FILE__": Warning! Too many connections (%u), dropping incoming connection.\n", MAX_CONNECTIONS);
pa_iochannel_free(io);
return;
}
c = pa_xmalloc(sizeof(struct connection));
c->protocol = p;
c->line = pa_ioline_new(io);
c->state = REQUEST_LINE;
c->url = NULL;
pa_ioline_set_callback(c->line, line_callback, c);
pa_idxset_put(p->connections, c, NULL);
}
pa_protocol_http* pa_protocol_http_new(pa_core *core, pa_socket_server *server, pa_module *m, PA_GCC_UNUSED pa_modargs *ma) {
pa_protocol_http* p;
assert(core && server);
p = pa_xmalloc(sizeof(pa_protocol_http));
p->module = m;
p->core = core;
p->server = server;
p->connections = pa_idxset_new(NULL, NULL);
pa_socket_server_set_callback(p->server, on_connection, p);
return p;
}
static void free_connection(void *p, PA_GCC_UNUSED void *userdata) {
assert(p);
connection_free(p, 0);
}
void pa_protocol_http_free(pa_protocol_http *p) {
assert(p);
pa_idxset_free(p->connections, free_connection, NULL);
pa_socket_server_unref(p->server);
pa_xfree(p);
}
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