使用 fsockopen 的罕见奇怪读数
我在一个小型 cronjob 上使用 fsockopen 来读取和解析不同服务器上的提要。对于大多数过去来说，这非常有效。然而，在某些服务器上，我在响应中得到非常奇怪的行，如下所示：
<language>en</language> <sy:updatePeriod>hourly</sy:updatePeriod> <sy:updateFrequency>1</sy:updateFrequency> 11 <item> <title> 1f July 8th, 2010</title> <link> 32 http://darkencomic.com/?p=2406</link> <comments> 3e
但是当我在例如记事本++中打开提要时，它工作得很好，显示：
<language>en</language> <sy:updatePeriod>hourly</sy:updatePeriod> <sy:updateFrequency>1</sy:updateFrequency> <item> <title>July 8th, 2010</title> <link>http://darkencomic.com/?p=2406</link> <comments>
...只是为了显示摘录。那么，我在这里做错了什么还是这超出了我的控制范围？我很感激任何解决这个问题的想法。 这是我用来检索提要的代码的一部分：
$fp = @fsockopen($url["host"], 80, $errno, $errstr, 5);
if (!$fp) {
throw new UrlException("($errno) $errstr ~~~ on opening ".$url["host"]."");
} else {
$out = "GET ".$path." HTTP/1.1\r\n"
."Host: ".$url["host"]."\r\n"
."Connection: Close\r\n\r\n";
fwrite($fp, $out);
$contents = '';
while (!feof($fp)) {
$contents .= stream_get_contents($fp,128);
}
fclose($fp);
I'm using fsockopen on a small cronjob to read and parse feeds on different servers. For the most past, this works very well. Yet on some servers, I get very weird lines in the response, like this:
<language>en</language> <sy:updatePeriod>hourly</sy:updatePeriod> <sy:updateFrequency>1</sy:updateFrequency> 11 <item> <title> 1f July 8th, 2010</title> <link> 32 http://darkencomic.com/?p=2406</link> <comments> 3e
But when I open the feed in e.g. notepad++, it works just fine, showing:
<language>en</language> <sy:updatePeriod>hourly</sy:updatePeriod> <sy:updateFrequency>1</sy:updateFrequency> <item> <title>July 8th, 2010</title> <link>http://darkencomic.com/?p=2406</link> <comments>
...just to show an excerpt. So, am I doing anything wrong here or is this beyond my control? I'm grateful for any idea to fix this.
Here's part of the code I'm using to retrieve the feeds:
$fp = @fsockopen($url["host"], 80, $errno, $errstr, 5);
if (!$fp) {
throw new UrlException("($errno) $errstr ~~~ on opening ".$url["host"]."");
} else {
$out = "GET ".$path." HTTP/1.1\r\n"
."Host: ".$url["host"]."\r\n"
."Connection: Close\r\n\r\n";
fwrite($fp, $out);
$contents = '';
while (!feof($fp)) {
$contents .= stream_get_contents($fp,128);
}
fclose($fp);
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这看起来像 HTTP 分块传输编码 - 这是一种方式HTTP 将响应分割成几个小部分；引用：
When working with `fsockopen` and the like, you have to deal with the HTTP Protocol yourself... Which is not always as easy as one might think ;-)
避免处理此类问题的解决方案是使用 curl ：它已经知道 HTTP 协议——这意味着您不必重新发明轮子；-)
This looks like HTTP Chunked transfer encoding -- which is a way HTTP has of segmenting a response into several small parts ; quoting :
When working with `fsockopen` and the like, you have to deal with the HTTP Protocol yourself... Which is not always as easy as one might think ;-)
A solution to avoid having to deal with such stuff would be to use something like curl : it already knows the HTTP Protocol -- which means you won't have to re-invent the whell ;-)
我没有看到任何奇怪的事情会导致这种行为。有什么方法可以使用 cURL 来为您做到这一点吗？它可能完全解决问题:)
I don't see anything strange that could cause that kind of behaviour. Is there any way you can use cURL to do this for you? It might solve the problem altogether :)