PHP CURL GET请求返回500，其中bash curl成功 [英] PHP CURL GET request returns 500 where bash curl succeeds

问题描述

我试图使用PHP的CURL向服务器发出GET请求，并且遇到了一些困难。当我通过PHP提出请求时，我从外部服务器返回一个500错误。

I'm attempting to use PHP's CURL to make a GET request to a server and am having some difficulties doing so. When I make the request through PHP I am returned a 500 error from the external server. However, if I make the request using the bash curl, or visit the URL in a browser it succeeds.

我已经剥离了PHP的基本要素：

I've stripped the PHP down to the bare essentials:

$url = 'http://example.com:8080/path/to/service?cmd=my_command&arg=example2.com';
$ch = curl_init($url);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
curl_exec($ch);
print_r(curl_getinfo($ch));
curl_close($ch);

如上所述，这会从example.com返回500错误。但是，如果我执行以下操作：

As stated this returns a 500 error from example.com. However, if I do the following:

[me@host ~] curl "http://example.com:8080/path/to/service?cmd=my_command&arg=example2.com"

XML文档。

什么给了？它必须是URL的编码，如果我把 $ url var下拉到 http://example.com： 8080 现在，PHP CURL请求响应为200.我尝试用％26 & c $ c> - 没有工作（也不会期望它，因为& 在那里的URL是有效的）。我试过做什么的答案为 php curl发送vars使用GET wierd结果，但这也没有帮助。

What gives? It's got to be something with the encoding of the URL, as if I strip the $url var down to just http://example.com:8080 the PHP CURL request now responds with 200. I've tried replacing the & with %26 - that didn't work (nor would I expect it to, as & is valid in the URL there). I've tried doing what the answer for php curl sending vars using GET wierd results suggested, but that didn't help either.

我在这里缺少什么？我相信这是荒谬的简单，但它逃避了我。

What am I missing here? I'm sure that it's something absurdly simple, but it's escaping me.

谢谢！

只是试图在Python中这样做 - 只是为了看到发生了什么 - 它工作正常：

I've just attempted doing this in Python - just to see what happened - and it works fine there:

import urllib2
r = urllib2.urlopen(theURL)
r.read()

推荐答案

事实证明，我正在访问的API需要一个用户代理的所有请求，但没有提供任何信息来表示这种情况。

It turns out that the API I was accessing required a User-Agent for all requests, but did not provide any information to indicate such.

这是常见的事情吗？除了 http：// developer，我找不到其他任何人执行此操作的其他示例.github.com / v3 /＃user-agent-required

Is this a common thing? I can't find any other examples of anyone else doing this other than http://developer.github.com/v3/#user-agent-required

我可以通过添加

curl_setopt($ch, CURLOPT_USERAGENT, "User-Agent: Some-Agent/1.0");

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