今天服务器上传大文件,服务器php一直没有响应,响应为0KB,经排查发现是lighttpd的超时设置问题
server.max-keep-alive-idle = 5
server.max-read-idle = 60
server.read-timeout = 0
server.max-connection-idle = 360
这几个参数意思相近,配置的时候很容易搞混。
对于一个keep-alive连接上的连续请求,发送第一个请求内容的最大间隔由参数max-read-idle决定,从第二个请求起,发送请求内容的最大间隔由参数max-keep-alive-idle决定。请求间的间隔超时也由max-keep-alive-idle决定。发送请求内容的总时间超时由参数read-timeout决定。Lighttpd与后端交互数据的超时由max-connection-idle决定。
例子:
下面是模拟客户端代码:
$fp = fsockopen("127.0.0.1", 8902, $errno, $errstr, 30);
fwrite($fp, "GET / HTTP/1.1\r\n");
sleep(3); //$1这个时间必须小于max-read-idle,否则会超时
fwrite($fp, "Host: a.com\r\n");
sleep(3); //$2这个时间必须小于max-read-idle,否则会超时。且$1+$2时间之和必须小于read-timeout,否则超时
fwrite($fp, "Connection: Keep-Alive\r\n\r\n");
echo fread($fp, 1024);
sleep(7); //$3 这个时间必须小于max-keep-alive-idle,否则超时
fwrite($fp, "GET / HTTP/1.1\r\n");
fwrite($fp, "Host: a.com\r\n");
sleep(15); //$4 这个时间必须小于max-keep-alive-idle,否则超时,可以大于max-read-idle,但仍然不能超过read-timeout
fwrite($fp, "Connection: Keep-Alive\r\n\r\n");
echo fread($fp, 1024);
fclose($fp);
//以上时间均不受max-connection-idle限制
下面是模拟后端server代码:
$sock = socket_create(AF_INET, SOCK_STREAM, SOL_TCP);
if($sock == NULL)
{
echo "can‘t create socket";
exit;
}
if(!socket_bind($sock, "0.0.0.0", 8904))
{
echo "can‘t bind socket";
exit;
}
socket_listen($sock, 100);
while(1)
{
if($new_conn = socket_accept($sock))
{
$recv = socket_read($new_conn, 100000);
//echo $recv;
echo "begin sleep\n";
sleep(10); //这个时间必须小于max-connection-idle,否则会超时
echo "end sleep\n";
socket_write($new_conn, "HTTP/1.1 200 OK\r\nDate: Tue, 01 Nov 2011 05:58:25 GMT\r\nServer: TestServer/1.0\r\nContent-Length: 1\r\nContent-Type: text/html;charset=gb2312\r\nConnection: Keep-Alive\r\n\r\na");
}
else
{
echo "accept failed!";
}
}
下面是lighttpd中关于这几个参数实现的代码:
if (con->recv->is_closed) {
if (srv->cur_ts - con->read_idle_ts > con->conf.max_connection_idle) { //对于客户端已经发送完请求数据的情况下,超时时间max-connection-idle
/* time - out */
#if 1
WARNING("(connection process timeout) [%s]", SAFE_BUF_STR(con->dst_addr_buf));
#endif
connection_set_state(srv, con, CON_STATE_ERROR);
changed = 1;
}
}
else {
if (con->request_count == 1) {
if (srv->cur_ts - con->read_idle_ts > con->conf.max_read_idle) { //对于第一个请求,发送的数据最大时间间隔:max_read_idle
/* time - out */
#if 1
if (con->conf.log_timeouts) {
WARNING("(initial read timeout) [%s]", SAFE_BUF_STR(con->dst_addr_buf));
}
#endif
connection_set_state(srv, con, CON_STATE_ERROR);
changed = 1;
}
} else { //从第二个请求开始,发送的数据最大时间间隔:keep_alive_idle
if (srv->cur_ts - con->read_idle_ts > con->keep_alive_idle) {
/* time - out */
#if 1
if (con->conf.log_timeouts) {
DEBUG("(keep-alive read timeout) [%s]", SAFE_BUF_STR(con->dst_addr_buf));
}
#endif
connection_set_state(srv, con, CON_STATE_ERROR);
changed = 1;
}
}
if (con->conf.read_timeout > 0 && con->read_start_ts > 0) //在read_timeout设置不为0的情况下,发送数据的最大总时间:read_timeout
{
used_time = srv->cur_ts - con->read_start_ts;
if (used_time > con->conf.read_timeout)
{
WARNING ("read timeout, client[%s], time=%lu",
SAFE_BUF_STR(con->dst_addr_buf), used_time);
connection_set_state(srv, con, CON_STATE_ERROR);
changed = 1;
}
}
}