使用curl发送请求时出现无效标头错误


invalid header error on sending a request with curl

这是我的代码

echo 22;
$url = 'http://www.10bet.com/pagemethods.aspx/GetLeaguesContent';
$fields = array(    
        'BranchID' => urlencode('1') , 
        'LeaguesCollection' => urlencode('10098') , 
                );
$fields_string  = '';
foreach($fields as $key=>$value) { $fields_string .= $key.'='.$value.'&'; }
rtrim($fields_string, '&');

$ch = curl_init();
curl_setopt($ch,CURLOPT_URL, $url);
curl_setopt($ch,CURLOPT_POST, count($fields));
curl_setopt($ch,CURLOPT_POSTFIELDS, $fields_string);
curl_setopt($ch, CURLINFO_HEADER_OUT, true);
curl_setopt($ch, CURLOPT_HTTPHEADER, array('Content-Type : application/json; charset=utf-8'));
$result = curl_exec($ch);
curl_close($ch);
var_dump( $result );

我一直收到

Bad Request - Invalid Header
HTTP Error 400. The request has an invalid header name.

您意外地得到错误

Bad Request - Invalid Header
HTTP Error 400. The request has an invalid header name.

因为您使用了无效的标头名称:)

您使用

Content-Type : application/json; charset=utf-8

注意标题名称中的空格

正确的用法是:

Content-Type: application/json; charset=utf-8

如果有人像@ZombieSpy所描述的那样遇到了这个问题,并想知道这种严格性是从哪里来的,这是在https://datatracker.ietf.org/doc/html/rfc7230#section-3.2,如下所示:

3.2.  Header Fields
   Each header field consists of a case-insensitive field name followed
   by a colon (":"), optional leading whitespace, the field value, and
   optional trailing whitespace.