PHP cURL POST 返回 415 - 不支持的媒体类型 - PHP cURL POST returns a 415 - Unsupported Media Type

我有一个简单的PHP脚本，它通过cURL发送HTTP POST请求，并期望一个json字符串作为响应（本来希望使用像pecl_http/HTTPRequest这样的现有库，但不能）。调用始终失败，并显示 415 错误 - 不支持的媒体类型。我认为我没有正确配置 cURL，但经过大量搜索，我无法找出我做错了什么。下面是一些代码：

class URLRequest
{
    public $url;
    public $headers;
    public $params;
    public $body;
    public $expectedFormat;
    public $method;
    public function URLRequest($aUrl, array $aHeaders, array $aParams, $aFormat = "json", $isPost = false, $aBody = "+")
    {
        $this->url = $aUrl;
        $this->headers = $aHeaders;
        $this->params = $aParams;
        $this->expectedFormat = $aFormat;
        $this->method = ($isPost ? "POST" : "GET");
        $this->body = $aBody;
    }
    public function exec()
    {
        $queryStr = "?";
        foreach($this->params as $key=>$val)
            $queryStr .= $key . "=" . $val . "&";
        //trim the last '&'
        $queryStr = rtrim($queryStr, "&");
        $url = $this->url . $queryStr;
        $request = curl_init();
        curl_setopt($request, CURLOPT_URL, $url);
        curl_setopt($request, CURLOPT_HEADER, 1);
        curl_setopt($request, CURLOPT_HTTPHEADER, $this->headers);
        curl_setopt($request, CURLOPT_RETURNTRANSFER, 1);
        //curl_setopt($request, CURLOPT_SSL_VERIFYPEER, false);
        if($this->method == "POST")
        {
            curl_setopt($request, CURLOPT_POST, 1);
            curl_setopt($request, CURLOPT_POSTFIELDS, $this->body);
            //this prevents an additions code 100 from getting returned
            //found it in some forum - seems kind of hacky
            curl_setopt($request, CURLOPT_HTTPHEADER, array("Expect:"));
        }
        $response = curl_exec($request);
        curl_close($request);
        preg_match("%(?<=HTTP/[0-9]'.[0-9] )[0-9]+%", $response, $code);
        $resp = "";
        if($this->expectedFormat == "json")
        {
            //parse response
        }
        elseif($this->expectedFormat == "xml")
        {
            //parse response
        }
        return $resp;
    }
}

$url = "http://mydomain.com/myrestcall";
$query = array( "arg_1" =>      "test001",
                "arg_2" =>      "test002",
                "arg_3" =>      "test003");
$headers = array(    "Accept-Encoding" =>    "gzip",
                    "Content-Type" =>       "application/json",
                    "Accept" =>             "application/json",
                    "custom_header_1" =>    "test011",
                    "custom_header_2" =>    "test012",
                    "custom_header_3" =>    "test013");
$body = array(  "body_arg_1" =>      "test021",
                "body_arg_2" =>     array("test022", "test023"), 
                "body_arg_3" =>     "test024"); 

$request = new URLRequest($url, $headers, $query, "json", true, $body);
$response = $request->exec();

。和响应：

HTTP/1.1 415 Unsupported Media Type
Server: Apache-Coyote/1.1
X-Powered-By: Servlet 2.5; JBoss-5.0/JBossWeb-2.1
Content-Type: text/html;charset=utf-8
Content-Length: 1047
Date: Mon, 18 Jun 2012 16:30:44 GMT
<html><head><title>JBoss Web/2.1.3.GA - Error report</title></head><body><h1>HTTP Status 415 - </h1><p><b>type</b> Status report</p><p><b>message</b> <u></u></p><p><b>description</b> <u>The server refused this request because the request entity is in a format not supported by the requested resource for the requested method ().</u></p><h3>JBoss Web/2.1.3.GA</h3></body></html>

有什么见解或想法吗？

提前感谢！

问题解决了！问题是：

发送标头的关联数组不适用于 cURL。周围散布着几个论坛，展示了使用关联数组作为标题的示例。别这样！

正确的方法（也分散在互联网上，但我太密集了，没有注意到）是将标题键/值对构造为字符串，并在设置 CURLOPT_HTTPHEADER 选项时传递这些字符串的标准数组。

所以综上所述，

错：

$headers = array(    "Accept-Encoding" =>    "gzip",
                     "Content-Type" =>       "application/json",
                     "custom_header_1" =>    "test011",
                     "custom_header_2" =>    "test012",
                     "custom_header_3" =>    "test013");

右：

$headers = array(    "Accept-Encoding: gzip",
                     "Content-Type: application/json",
                     "custom_header_1: test011",
                     "custom_header_2: test012",
                     "custom_header_3: test013");

我希望这对其他一些高贵的傻瓜来说派上用场，以免他们像我一样浪费那么多时间进行调试。

如果我不得不猜测，我会假设同样的规则也适用于 POST 正文键/值对，这就是为什么@drew010关于使用 http_build_query() 或 json_encode() 来字符串化消息正文的评论也是一个好主意。

感谢大家的非常有用的评论，以及您的时间和考虑。最后，对http流量（通过Wireshark捕获）的并排比较揭示了这个问题。

谢谢！

我认为问题是您将数组作为CURLOPT_POSTFIELDS选项传递。通过传递数组，这会强制POST请求在服务器可能期望application/x-www-form-urlencoded时使用multipart/form-data。

尝试更改

curl_setopt($request, CURLOPT_POSTFIELDS, $this->body);

自

curl_setopt($request, CURLOPT_POSTFIELDS, http_build_query($this->body));

有关更多信息以及此答案，请参阅http_build_query：我的 cURL 请求混淆了某些服务器？

这对

我有用

 $data ="data";
 $headers = [
                "Content-Type: application/json",
                "X-Content-Type-Options:nosniff",
                "Accept:application/json",
                "Cache-Control:no-cache"
            ];
  $auth =  $USER . ":" . $PASSWORD;

 $curl = curl_init();
        curl_setopt($curl,CURLOPT_URL, $url);
        curl_setopt($curl,CURLOPT_RETURNTRANSFER, true);
        curl_setopt($curl,CURLOPT_ENCODING, "");
        curl_setopt($curl,CURLOPT_MAXREDIRS, 10);
        curl_setopt($curl,CURLOPT_TIMEOUT, 0);
        curl_setopt($curl,CURLOPT_FOLLOWLOCATION, true);
        curl_setopt($curl,CURLOPT_HTTP_VERSION,CURL_HTTP_VERSION_1_1);
        curl_setopt($curl,CURLOPT_CUSTOMREQUEST, "POST");
        curl_setopt($curl,CURLOPT_POSTFIELDS, json_encode($data)); 
        curl_setopt($curl, CURLOPT_USERPWD,  $auth);  
        curl_setopt($curl,CURLOPT_HTTPHEADER, $headers);
         $result = curl_exec($curl);

我遇到了同样的问题，我修复了更改标题的问题。

我的代码：

$authorization = 'authorization: Bearer '.trim($apiKey);
$header = [
'Content-Type: application/json',
$authorization
];
curl_setopt($session, CURLOPT_HTTPHEADER, $header);

我不知道为什么数组函数不起作用：

curl_setopt($session, CURLOPT_HTTPHEADER, array('Content-Type: 
application/json',
$authorization));