預檢的響應具有無效的HTTP狀態代碼

我在folowing結構中遇到了一些麻煩。我有2個域名：example.com和api.example.com。我在Angular上寫了example.com的主站點。我用這個代碼example.com/app.js調用函數api.example.com：預檢的響應具有無效的HTTP狀態代碼

$http({ 
    method: 'POST', 
    url: 'http://api.example.com/register', 
    dataType: 'json', 
    crossDomain: true, 
    data: { 
     email: register.data.email, 
     password: register.data.password 
    }, 
    headers: { 
     'Content-Type': 'application/json; charset=UTF-8' 
    } 
}).then(function(data) { 
    console.log(data); 
    }, function(data) { 
     console.log(data); 
});

而且所有ofthis給我的錯誤

OPTIONS http://api.example.com/register 400 (Bad Request)

和

XMLHttpRequest cannot load http://api.example.com/register. Response for preflight has invalid HTTP status code 400

我的PHP代碼返回如下因素

//some logic code here 
if ($json['status'] == 0) 
{ 
    header('Access-Control-Allow-Origin: *'); 
    header('Access-Control-Allow-Methods: POST, GET'); 
    header('Access-Control-Allow-Headers: Content-Type'); 
    header('Content-type: application/json; charset=utf-8'); 
    echo json_encode($json['data']); 
} 
else 
{ 
    header('Access-Control-Allow-Origin: *'); 
    header('Access-Control-Allow-Methods: POST'); 
    header('Access-Control-Allow-Methods: GET'); 
    header('Access-Control-Allow-Headers: X-Requested-With'); 
    header('HTTP/1.1 400 Bad Request'); 
    header('Access-Control-Allow-Headers: Content-Type'); 
    header('Content-Type: application/json; charset=UTF-8'); 
    http_response_code(400); 
}

我的地方$json['status']=0一切都OK。它工作，返回狀態200 OK。當我給出錯誤的參數時，我有$json['status']=1，我得到了我描述的錯誤。

其網絡返回

Request URL:http://api.example.com/user/register 
Request Method:OPTIONS 
Status Code:400 Bad Request 
Remote Address:78.46.140.200:80 
Response Headers 
view source 
Access-Control-Allow-Headers:X-Requested-With 
Access-Control-Allow-Methods:GET 
Access-Control-Allow-Origin:* 
Connection:close 
Content-Type:text/html; charset=UTF-8 
Date:Thu, 09 Mar 2017 17:12:22 GMT 
Server:Apache 
Transfer-Encoding:chunked 
Request Headers 
view source 
Accept:*/* 
Accept-Encoding:gzip, deflate, sdch 
Accept-Language:ru-RU,ru;q=0.8,en-US;q=0.6,en;q=0.4,az;q=0.2 
Access-Control-Request-Headers:content-type 
Access-Control-Request-Method:POST 
Connection:keep-alive 
Host:api.example.com 
Origin:http://example.com 
Referer:http://example.com/register 
User-Agent:Mozilla/5.0 (Windows NT 6.1; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/56.0.2924.87 Safari/537.36

來源

2017-03-09 Ali S. Veliyev

您能否提供ajax方法生成的http調用數據？ OPTIONS和POST請致電。 –

@Pheagey我寫過我的ajax查詢。我不使用OPTIONS方法進行調用。當我的PHP文件返回錯誤400頭，他給了我這個錯誤。我總是用POST方法發送數據到PHP –

'preflight'是OPTIONS請求。在瀏覽器中打開網絡選項卡並運行代碼。您應該看到.ajax方法會在POSTing之前自動發出OPTIONS請求，因爲請求是一個跨源請求（CORS）類型的調用。 –