Laravel 10虚拟主机POST请求遇cURL Error 7问题求助

问题概述 #

Laravel应用部署到虚拟主机后，向远程服务器http://**.**.***.***:5000发起POST请求时触发cURL error 7，本地开发环境及Postman测试均正常，仅虚拟主机环境下无法连接。

目标 #

让运行在虚拟主机的Laravel应用能够成功向远程服务器http://**.**.***.***:5000发送POST请求。

环境详情 #

• Laravel版本：10
• 虚拟主机：http://subdomain.domain.com

控制器代码 #

public function send(Request $request)
{
    // Validate the request data (you can add more validation rules as needed)
    $this->validate($request, [
        'message_session' => 'required',
        'whatsapp_user_id' => 'required',
        'sender_id' => 'required',
        'messageTime' => 'required',
        'phone' => 'required',
    ]);

    try {
        // Start a database transaction
        DB::beginTransaction();
        
        // Create a new WhatsappMessages instance and populate it with the request data
        $whatsappMessage = new WhatsappMessages();
        $whatsappMessage->message_session = $request->input('message_session');
        $whatsappMessage->whatsapp_user_id = $request->input('whatsapp_user_id');
        $whatsappMessage->sender_id = $request->input('sender_id');
        $whatsappMessage->messageTime = $request->input('messageTime');
        $whatsappMessage->messageText = $request->input('message');

        if (auth()->user()->id == $request->input('sender_id')) {
            // Define the URL of the endpoint
            $url = env('MESSAGE_API_URL') . '/send-message';
            
            // Prepare the data to send in the request
            $data = [
                'to' => $request->input('phone'),
                'message' => $request->input('message'),
            ];

            // Make a POST request to the endpoint
            $response = Http::post($url, $data);
            // Check if the request was successful (status code 200)
            if ($response['status']==200) {
                // Save the instance to the database
                $whatsappMessage->save();

                // Commit the database transaction
                DB::commit();

                // Return a JSON response indicating that the message was sent
                return response()->json(['message' => 'Message sent successfully']);
            } else {
                // The request to the external service was not successful
                // Roll back the database transaction
                DB::rollBack();

                // Return a JSON response indicating the failure to send the message
                return response()->json(['message' => 'Failed to send message to WhatsApp'], 500);
            }
        } else {
            // Save the instance to the database
            $whatsappMessage->save();

            // Commit the database transaction
            DB::commit();

            // Return a JSON response indicating that the message was received
            return response()->json(['message' => 'Message received successfully']);
        }
    } catch (\Exception $e) {
        // An exception occurred
        // Roll back the database transaction
        DB::rollBack();

        // Log the exception for debugging
        Log::error($e);

        // Return a JSON response indicating an error
        return response()->json(['message' => 'An error occurred while processing the request'], 500);
    }
}

问题细节 #

当代码中存在$response = Http::post($url, $data);这一行时，虚拟主机环境下立即报错；移除该行后，代码运行完全正常。

错误信息 #

cURL error 7: Failed to connect to **.**.***.*** port 5000 after 1003 ms: Couldn't connect to server (see https://curl.haxx.se/libcurl/c/libcurl-errors.html) for http://**.**.***.***:5000/send-message

已尝试的排查步骤 #

• 确认远程服务器http://**.**.***.***:5000配置正确，Postman及本地控制器均可正常访问该接口，仅虚拟主机环境无法建立连接。

请求帮助 #

怀疑问题与虚拟主机的网络配置或端口限制有关，恳请有类似cURL连接问题排查经验的朋友提供指导和解决方案。

内容的提问来源于stack exchange，提问作者Fahad Ishan