我遇到了一个愚蠢的问题：我需要获取一定数量的字节，然后关闭连接。我发现我可以从标头中提取“内容长度”，并使用该长度来确定在断开连接之前我应该获得多少字节。但是，看来我犯了一个错误。它只获得 40 个字节，而不是 2428（应该如此）。也许我没有正确使用 fgets() ？
这是代码：
private static function Send($URL, $Data) {
$server = parse_url($URL, PHP_URL_HOST);
$port = parse_url($URL, PHP_URL_PORT);
// If the parsing the port information fails, we will assume it's on a default port.
// As such, we'll set the port in the switch below.
if($port == null) {
switch(parse_url($URL, PHP_URL_SCHEME)) {
case "HTTP":
$port = 80;
break;
case "HTTPS":
$port = 443;
break;
}
}
// Check if we are using a proxy (debug configuration typically).
if(\HTTP\HTTPRequests::ProxyEnabled) {
$server = \HTTP\HTTPRequests::ProxyServer;
$port = \HTTP\HTTPRequests::ProxyPort;
}
// Open a connection to the server.
$connection = fsockopen($server, $port, $errno, $errstr);
if (!$connection) {
die("OMG Ponies!");
}
echo "===========================================================<BR>";
echo "Connection Open<BR>";
echo "The Time is " . date("H:i:su", time()) . "<BR>";
echo "Sending Request<BR>";
fwrite($connection, $Data);
echo "Request Sent.";
echo "The Time is " . date("H:i:su", time()) . "<BR>";
$responseheader = "";
$responsebody = "";
/*
\HTTP\HTTPRequests::$start = NULL;
\HTTP\HTTPRequests::$timeout = 10;
// @todo: Rewrite this. Should keep checking for '/r/n/r/n', then check for a content length header. If found, keep grabbing bytes, then close. If not, then close immediately.
while(!\HTTP\HTTPRequests::safe_feof($connection, \HTTP\HTTPRequests::$start) && (microtime(true) - \HTTP\HTTPRequests::$start) < \HTTP\HTTPRequests::$timeout)
{
$response .= fgets($connection);
}
*/
echo "Getting Response<BR>";
echo "The Time is " . date("H:i:su", time()) . "<BR>";
while(!feof($connection) && !(strlen(strstr($responseheader,"\r\n\r\n"))>0)) {
$responseheader .= fgets($connection);
}
echo "The Header is fully received at " . date("H:i:su", time()) . "<BR>";
echo "Header (raw):" . "<BR>";
echo "/////////////////////////////////////////////<BR>";
echo $responseheader . "<BR>";
echo "/////////////////////////////////////////////<BR>";
if((strlen(strstr($responseheader,"Content-Length:"))>0)) {
$contentlength = ((int)(\Extract\Extract::GetContentLength($responseheader)));
//for($i = 0; $i < $contentlength; $i++) {
$responsebody .= fgets($connection, $contentlength);
//}
echo "The Body is fully received at " . date("H:i:su", time()) . "<BR>";
echo "Body (raw):" . "<BR>";
echo "{}{}{}{}{}{}{}{}{}{}{}{}{}{}{}{}{}{}{}{}{}{}{}{}<BR>";
echo $responsebody . "<BR>";
echo "{}{}{}{}{}{}{}{}{}{}{}{}{}{}{}{}{}{}{}{}{}{}{}{}<BR>";
echo "<B>!Content length is " . strlen($responsebody) . ". It should be " . $contentlength . "!</B><BR>";
}
echo "Response Received.<BR>";
echo "The Time is " . date("H:i:su", time()) . "<BR>";
fclose($connection);
echo "Connection Closed.<BR>";
echo "The Time is " . date("H:i:su", time()) . "<BR>";
echo "Exiting Send() method.<BR>";
echo "===========================================================<BR>";
echo "<BR>";
return $responseheader . $responsebody;
}
这是输出：
===========================================================
Connection Open
The Time is 15:57:29000000
Sending Request
Request Sent.The Time is 15:57:29000000
Getting Response
The Time is 15:57:29000000
The Header is fully received at 15:57:29000000
Header (raw):
/////////////////////////////////////////////
HTTP/1.1 207 Multi-Status Date: Wed, 11 Apr 2012 19:57:18 GMT Server: Apache/2.2.8 (Ubuntu) PHP/5.2.4-2ubuntu5.14 with Suhosin-Patch mod_ssl/2.2.8 OpenSSL/0.9.8g mod_wsgi/2.0 Python/2.5.2 mod_perl/2.0.3 Perl/v5.8.8 X-Powered-By: PHP/5.2.4-2ubuntu5.14 DAV: 1, 2, 3, access-control, calendar-access, calendar-schedule DAV: extended-mkcol, calendar-proxy, bind, addressbook, calendar-auto-schedule Content-Location: /davical/caldav.php/rwr26/home/ ETag: "8378ead7e628deafd91ec99dc180ad74" X-DAViCal-Version: DAViCal/0.9.9; DB/1.2.9 Content-Length: 2428 Keep-Alive: timeout=15, max=100 Connection: Keep-Alive Content-Type: text/xml; charset="utf-8"
/////////////////////////////////////////////
The Body is fully received at 15:57:29000000
Body (raw):
{}{}{}{}{}{}{}{}{}{}{}{}{}{}{}{}{}{}{}{}{}{}{}{}
{}{}{}{}{}{}{}{}{}{}{}{}{}{}{}{}{}{}{}{}{}{}{}{}
!Content length is 40. It should be 2428!
Response Received.
The Time is 15:57:29000000
Connection Closed.
The Time is 15:57:29000000
Exiting Send() method.
===========================================================
我为什么要这样做？显然，我遇到了某种超时错误，这使每个连接保持打开状态 30 秒（是的，整整 30 秒）。所以我写了这段代码来获取确切的字节数，然后关闭。任何帮助是极大的赞赏。