xwords/xwords4/relay/http.cpp

235 lines
6.2 KiB
C++

/* -*-mode: C; fill-column: 78; c-basic-offset: 4; -*- */
/*
* Copyright 2009 by Eric House (xwords@eehouse.org). All rights reserved.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program 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 General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#ifdef DO_HTTP
#include <stdio.h>
#include <unistd.h>
#include <netdb.h> /* gethostbyname */
#include <errno.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <unistd.h>
#include <fcntl.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <stdlib.h>
#include <string.h>
#include <iostream>
#include <sstream>
#include <pthread.h>
#include <assert.h>
#include <sys/select.h>
#include <stdarg.h>
#include <sys/time.h>
#include "ctrl.h"
#include "cref.h"
#include "crefmgr.h"
#include "mlock.h"
#include "xwrelay_priv.h"
#include "configs.h"
#include "lstnrmgr.h"
/*
* http://www.jbox.dk/sanos/webserver.htm has code for a trivial web server. Good example.
*/
static void
send_header( FILE* fil, const char* title )
{
fprintf( fil, "HTTP/1.0 %d %s\r\n", 200, title );
fprintf( fil, "Server: xwrelay\r\n" );
fprintf( fil, "Content-Type: text/html\r\n" );
fprintf( fil, "Connection: close\r\n");
fprintf( fil, "\r\n");
}
static void
send_meta( FILE* fil )
{
FILE* css;
RelayConfigs* cfg = RelayConfigs::GetConfigs();
fprintf( fil, "<head>" );
if ( !!cfg ) {
int refreshSecs;
if ( cfg->GetValueFor( "WWW_REFRESH_SECS", &refreshSecs ) ) {
fprintf( fil, "<meta http-equiv=\"refresh\" content=\"%d\" />",
refreshSecs );
}
}
css = fopen( "./xwrelay.css", "r" );
if ( NULL != css ) {
for ( ; ; ) {
char buf[256];
size_t nread = fread( buf, 1, sizeof(buf), css );
if ( nread <= 0 ) {
break;
}
(void) fwrite( buf, 1, nread, fil );
}
fclose( css );
}
fprintf( fil, "</head>" );
}
static void
printUptime( FILE* fil )
{
char buf[128];
fprintf( fil, "<div class=\"header\">Uptime</div>" );
format_uptime( buf, sizeof(buf) );
fprintf( fil, "<p>%s</p>", buf );
}
static void
printTail( FILE* fil )
{
char buf[128];
/* print version and uptime */
fprintf( fil, "<div class=\"header\">Relay version</div>" );
format_rev( buf, sizeof(buf) );
fprintf( fil, "<p>%s</p>", buf );
}
static void
printCrefs( FILE* fil )
{
fprintf( fil, "<div class=\"header\">Connections</div>" );
fprintf( fil, "<table><tr>" );
fprintf( fil,
"<th>Cookie</th>"
"<th>ConnName</th>"
"<th>Cookie ID</th>"
"<th>Total sent</th>"
"<th>Players</th>"
"<th>Players Here</th>"
"<th>State</th>"
"<th>Host IDs</th>"
);
fprintf( fil, "</tr>\n" );
CRefMgr* cmgr = CRefMgr::Get();
CookieMapIterator iter = cmgr->GetCookieIterator();
CookieID id;
for ( id = iter.Next(); id != 0; id = iter.Next() ) {
string tmp;
SafeCref scr( id );
fprintf( fil, "<tr>"
"<td>%s</td>" /* name */
"<td>%s</td>" /* conn name */
"<td>%d</td>" /* cookie id */
"<td>%d</td>" /* total sent */
"<td>%d</td>" /* players */
"<td>%d</td>" /* players here */
"<td>%s</td>" /* State */
"<td>%s</td>" /* Hosts */
"</tr>",
scr.Cookie(), scr.ConnName(), scr.GetCookieID(),
scr.GetTotalSent(), scr.GetPlayersTotal(),scr.GetPlayersHere(),
scr.StateString(), scr.GetHostsConnected(tmp)
);
}
fprintf( fil, "</table>\n" );
}
static void
printStats( FILE* fil )
{
CRefMgr* cmgr = CRefMgr::Get();
int nGames = cmgr->GetNumGamesSeen();
int siz = cmgr->GetSize();
fprintf( fil, "<div class=\"header\">Stats</div>" );
fprintf( fil, "<table>" );
fprintf( fil, "<tr><th>Games played</th><th>Games in play</th></tr>" );
fprintf( fil, "<tr><td>%d</td><td>%d</td></tr>\n", nGames, siz );
fprintf( fil, "</table>" );
}
static void*
http_thread_main( void* arg )
{
int sock = (int)arg;
char buf[512];
ssize_t totalRead = 0;
while ( totalRead <= 4 ) { /* have we read enough for GET? */
ssize_t nread = read( sock, buf+totalRead, sizeof(buf)-1-totalRead );
if ( nread == 0 ) {
break;
} else if ( nread > 0 ) {
buf[nread] = '\0';
}
totalRead += nread;
}
if ( 0 == strncasecmp( "GET ", buf, 3 ) ) {
FILE* fil = fdopen( sock, "r+" );
fseek( fil, 0, SEEK_CUR ); // reverse stream
send_header( fil, "status page" );
fprintf( fil, "<html>" );
send_meta( fil );
fprintf( fil, "<body><div class=\"main\">" );
printStats( fil );
printCrefs( fil );
printUptime( fil );
printTail( fil );
fprintf( fil, "</div></body></html>" );
fclose( fil );
} else {
logf( XW_LOGINFO, "NOT a GET" );
}
close( sock );
return NULL;
} /* http_thread_main */
void
run_http_thread( int http_sock )
{
sockaddr newaddr;
socklen_t siz = sizeof(newaddr);
int newSock = accept( http_sock, &newaddr, &siz );
pthread_t thread;
int result = pthread_create( &thread, NULL,
http_thread_main, (void*)newSock );
if ( 0 == result ) {
pthread_detach( thread );
} else {
logf( XW_LOGERROR, "%s: pthread_create failed", __func__ );
}
} /* run_http_thread */
#endif /* DO_HTTP */