mirror of
git://xwords.git.sourceforge.net/gitroot/xwords/xwords
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313 lines
9.1 KiB
C++
313 lines
9.1 KiB
C++
/* -*-mode: C; fill-column: 78; c-basic-offset: 4; -*- */
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/*
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* Copyright 2009 by Eric House (xwords@eehouse.org). All rights reserved.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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#ifdef DO_HTTP
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#include <stdio.h>
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#include <unistd.h>
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#include <netdb.h> /* gethostbyname */
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#include <errno.h>
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#include <sys/types.h>
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#include <sys/socket.h>
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#include <unistd.h>
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#include <fcntl.h>
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#include <netinet/in.h>
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#include <arpa/inet.h>
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#include <stdlib.h>
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#include <string.h>
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#include <iostream>
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#include <sstream>
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#include <pthread.h>
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#include <assert.h>
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#include <sys/select.h>
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#include <stdarg.h>
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#include <sys/time.h>
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#include "ctrl.h"
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#include "cref.h"
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#include "crefmgr.h"
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#include "mlock.h"
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#include "xwrelay_priv.h"
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#include "configs.h"
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#include "lstnrmgr.h"
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#include "http.h"
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/*
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* http://www.jbox.dk/sanos/webserver.htm has code for a trivial web server. Good example.
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*/
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static void
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send_header( FILE* fil, const char* title )
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{
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fprintf( fil, "HTTP/1.0 %d %s\r\n", 200, title );
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fprintf( fil, "Server: xwrelay\r\n" );
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fprintf( fil, "Content-Type: text/html\r\n" );
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fprintf( fil, "Connection: close\r\n");
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fprintf( fil, "\r\n");
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}
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static void
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send_meta( FILE* fil, const CrefMgrInfo* info )
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{
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FILE* css;
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RelayConfigs* cfg = RelayConfigs::GetConfigs();
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char pathbuf[256] = { '\0' };
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fprintf( fil, "<head>" );
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if ( !!cfg ) {
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int refreshSecs;
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if ( cfg->GetValueFor( "WWW_REFRESH_SECS", &refreshSecs ) ) {
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fprintf( fil, "<meta http-equiv=\"refresh\" content=\"%d\" />",
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refreshSecs );
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}
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(void)cfg->GetValueFor( "WWW_CSS_PATH", pathbuf, sizeof(pathbuf) );
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}
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if ( pathbuf[0] ) {
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css = fopen( pathbuf, "r" );
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if ( NULL != css ) {
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for ( ; ; ) {
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char buf[256];
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size_t nread = fread( buf, 1, sizeof(buf), css );
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if ( nread <= 0 ) {
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break;
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}
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(void) fwrite( buf, 1, nread, fil );
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}
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fclose( css );
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}
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}
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fprintf( fil, "<title>relay: %d/%d</title>\n", info->m_nRoomsFilled,
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info->m_nCrefsCurrent );
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fprintf( fil, "</head>" );
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}
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static void
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printTail( FILE* fil )
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{
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char buf[128];
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/* print version and uptime */
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fprintf( fil, "<div class=\"header\">Relay version</div>" );
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format_rev( buf, sizeof(buf) );
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fprintf( fil, "<p>%s</p>", buf );
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}
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static void
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printCrefs( FILE* fil, const CrefMgrInfo* info, bool isLocal )
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{
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fprintf( fil, "<div class=\"header\">Connections</div>" );
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fprintf( fil, "<table><tr>" );
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fprintf( fil,
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"<th>Room</th>"
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"<th>Lang</th>"
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"<th>ConnName</th>"
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"<th>ID</th>"
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"<th>For</th>"
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"<th>Bytes</th>"
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"<th>Expect</th>"
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"<th>Here</th>"
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"<th>State</th>"
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"<th>Host IDs</th>"
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"<th>Seeds</th>"
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);
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if ( isLocal ) {
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fprintf( fil, "<th>Host IPs</th>" );
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}
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fprintf( fil, "</tr>\n" );
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time_t curTime = uptime();
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int ii;
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for ( ii = info->m_crefInfo.size() - 1; ii >= 0; --ii ) {
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const CrefInfo* crefInfo = &info->m_crefInfo[ii];
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char conntime[32];
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format_uptime( curTime - crefInfo->m_startTime, conntime,
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sizeof(conntime) );
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fprintf( fil, "<tr>"
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"<td>%s</td>" /* name */
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"<td>%d</td>" /* lang */
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"<td>%s</td>" /* conn name */
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"<td>%d</td>" /* cookie id */
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"<td>%s</td>" /* conntime */
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"<td>%d</td>" /* players */
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"<td>%d</td>" /* players here */
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"<td>%s</td>" /* State */
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"<td>%s</td>" /* Hosts */
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"<td>%s</td>" /* Seeds */
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,
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crefInfo->m_cookie.c_str(),
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crefInfo->m_langCode,
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crefInfo->m_connName.c_str(),
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crefInfo->m_cookieID,
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conntime,
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crefInfo->m_nPlayersSought, crefInfo->m_nPlayersHere,
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stateString( crefInfo->m_curState ),
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crefInfo->m_hostsIds.c_str(),
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crefInfo->m_hostSeeds.c_str()
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);
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if ( isLocal ) {
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fprintf( fil, "<td>%s</td>", /* Ip addrs */
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crefInfo->m_hostIps.c_str() );
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}
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fprintf( fil, "</tr>\n" );
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}
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fprintf( fil, "</table>\n" );
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} /* printCrefs */
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static void
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printStats( FILE* fil, const CrefMgrInfo* info, bool isLocal )
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{
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char uptime1[64];
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char uptime2[64];
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format_uptime( uptime(), uptime1, sizeof(uptime1) );
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format_uptime( time(NULL) - info->m_startTimeSpawn, uptime2,
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sizeof(uptime2) );
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fprintf( fil, "<div class=\"header\">Stats</div>" );
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fprintf( fil, "<table>" );
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fprintf( fil, "<tr>"
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"<th>Ports</th><th>Uptime</th><th>Spawns</th><th>Spawn Utime</th>"
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"<th>Rooms filled</th><th>Games in play</th></tr>" );
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fprintf( fil, "<tr><td>%s</td><td>%s</td><td>%d</td>"
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"<td>%s</td><td>%d</td><td>%d</td></tr>\n",
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info->m_ports, uptime1, GetNSpawns(), uptime2,
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info->m_nRoomsFilled, info->m_nCrefsCurrent );
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fprintf( fil, "</table>" );
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}
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class HttpInstance {
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public:
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HttpInstance( int sock, HttpState* state ) {
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m_sock = sock;
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m_state = state;
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}
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int m_sock;
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HttpState* m_state;
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};
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static void*
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http_thread_main( void* arg )
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{
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blockSignals();
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HttpInstance* inst = (HttpInstance*)arg;
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HttpState* state = inst->m_state;
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int sock = inst->m_sock;
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char buf[512];
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ssize_t totalRead = 0;
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while ( totalRead <= 4 ) { /* have we read enough for GET? */
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ssize_t nread = read( sock, buf+totalRead, sizeof(buf)-1-totalRead );
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if ( nread == 0 ) { // EOF
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break;
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} else if ( nread > 0 ) {
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buf[nread] = '\0';
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} else {
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logf( XW_LOGERROR, "%s: read() got error: %s", __func__,
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strerror(errno) );
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break;
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}
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totalRead += nread;
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}
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if ( 0 == strncasecmp( "GET ", buf, 3 ) ) {
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struct sockaddr_in name;
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socklen_t namelen = sizeof(name);
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bool isLocal = 0 == getpeername( sock, (struct sockaddr*)&name,
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&namelen );
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if ( isLocal ) {
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in_addr_t s_addr = name.sin_addr.s_addr;
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isLocal = 0x7f000001 == htonl(s_addr);
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}
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MutexLock ml(&state->m_dataMutex);
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/* We'll handle as many http connections as folks want to throw at us,
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but will only fetch from the crefmgr infrequently, caching the data
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for next time. Only one thread at a time gets to read from it,
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ensuring we don't nuke it from under somebody. */
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time_t curTime = time( NULL );
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if ( state->m_nextFetch < curTime ) {
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delete state->m_crefInfo;
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state->m_crefInfo = NULL;
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}
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if ( state->m_crefInfo == NULL ) {
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state->m_crefInfo = new CrefMgrInfo();
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CRefMgr::Get()->GetStats( *state->m_crefInfo );
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state->m_nextFetch = curTime + state->m_sampleInterval;
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}
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const CrefMgrInfo* info = state->m_crefInfo;
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FILE* fil = fdopen( sock, "r+" );
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fseek( fil, 0, SEEK_CUR ); // reverse stream
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send_header( fil, "status page" );
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fprintf( fil, "<html>" );
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send_meta( fil, info );
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fprintf( fil, "<body><div class=\"main\">" );
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printStats( fil, info, isLocal );
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printCrefs( fil, info, isLocal );
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printTail( fil );
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fprintf( fil, "</div></body></html>" );
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fclose( fil );
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} else {
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logf( XW_LOGINFO, "NOT a GET" );
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}
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close( sock );
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delete inst;
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return NULL;
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} /* http_thread_main */
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void
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run_http_thread( HttpState* state )
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{
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pthread_t thread;
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sockaddr newaddr;
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socklen_t siz = sizeof(newaddr);
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int sock = accept( state->ctrl_sock, &newaddr, &siz );
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HttpInstance* inst = new HttpInstance( sock, state );
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int result = pthread_create( &thread, NULL, http_thread_main,
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(void*)inst );
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if ( 0 == result ) {
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pthread_detach( thread );
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} else {
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logf( XW_LOGERROR, "%s: pthread_create failed: %s", __func__,
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strerror(errno) );
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}
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} /* run_http_thread */
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#endif /* DO_HTTP */
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