<?php

    function doService($url,HttpParameter $httpParameters, $headers, $connectTimeout, $readTimeout){
        switch ($httpParameters->getHttpMethod()) {
            case HttpMethod::GET:
                $result = doGet($url,$headers,$httpParameters->getParams(), $connectTimeout, $readTimeout);
                break;
            case HttpMethod::POST:
                if ($httpParameters->isFiles()) {
                    $result = doPostWithFiles($url,$headers,$httpParameters->getParams(), $httpParameters->getListFiles());
                    break;
                }
                $result = doPost($url,$headers,$httpParameters->getParams(), $connectTimeout, $readTimeout);
                break;
            default:
                $result = null;
                break;
        }
        return $result;
    }

    function doServiceWithJson($url, $json, $headers, $connectTimeout, $readTimeout){
        $flag=1;
        while($flag <= HttpConnection::RENNECT_TIMES) {
            try {
                if (!function_exists('curl_init')) {
                    throw new Exception("CURL扩展没有开启!");
                }
                $curl = curl_init();
                array_push($headers, 'Content-Type:application/json;charset=UTF-8');
                $curl = HttpConnection::buildHttpRequest($curl, $url, $headers);
                // 提交post请求
                curl_setopt($curl, CURLOPT_POSTFIELDS, $json);
                $output = curl_exec($curl);
                if ($output === false) {
                    $res = array(
                        "code" => 1001,
                        "message" => curl_error($curl)
                    );
                    $output = json_encode($res);
                }
                // 关闭CRUL
                curl_close($curl);
            } catch (Exception $exc) {
                // 关闭CRUL
                curl_close($curl);
                $res = array(
                    "code" => 1001,
                    "message" => $exc->getMessage()
                );
                $output = json_encode($res);
            }
            if($output){
                break;
            }
            $flag++;
        }
        return $output;
    }

    function doDownload($url,HttpParameter $httpParameters, $headers, $connectTimeout, $readTimeout, $filePath){
        $result = doGet($url,$headers,$httpParameters->getParams(), $connectTimeout, $readTimeout);
        //判断是否返回文件流
        $array_output = json_decode($result, true);
        if(is_array($array_output) && array_key_exists("code",$array_output) && $array_output['code']!==0){
            return array(
                "code" => $array_output['code'],
                "message" => $array_output['message']
            );
        }
        //对文件名的编码，避免中文文件名乱码
        $destination = iconv("UTF-8", "GBK", $filePath);
        $file = fopen($destination,"w+");
        $answer = fputs($file,$result);//写入文件
        fclose($file);
        if($answer===false){
            return array(
                "code" => 1001,
                "message" => '下载文件失败'
            );
        }else{
            return array(
                "code" => 0,
                "message" => '下载文件完成,字节数:'.$answer
            );
        }
    }

    /**
     * GET请求
     * @param $url
     * @param $heads
     * @param $data
     * @return mixed|string
     */
    function doGet($url, $heads, $data, $connectTimeout, $readTimeout){
        $flag=1;
        while($flag <= HttpConnection::RENNECT_TIMES){
            try {
                // 请求参数有值时构建get请求
                if ($data) {
                    $url = HttpConnection::buildGetUrlParams($url, $data);
                }
                if (!function_exists('curl_init')) {
                    throw new Exception("CURL扩展没有开启!");
                }
                $curl = curl_init();
                $curl = HttpConnection::buildHttpRequest($curl, $url, $heads);
                $output = curl_exec($curl);
                if ($output === false) {
                    $res = array(
                        "code" => 1001,
                        "message" => curl_error($curl)
                    );
                    $output = json_encode($res);
                }
                curl_close($curl);
            } catch (Exception $exc) {
                curl_close($curl);
                $res = array(
                    "code" => 1001,
                    "message" => $exc->getMessage()
                );
                $output = json_encode($res);
            }
            if($output){
                break;
            }
            $flag++;
        }
        return $output;
    }

    /**
     * POST请求
     * @param $url
     * @param $heads
     * @param $data
     * @return mixed|string
     */
    function doPost($url, $heads, $data, $connectTimeout, $readTimeout){
        $flag=1;
        while($flag <= HttpConnection::RENNECT_TIMES) {
            try {
                if (!function_exists('curl_init')) {
                    throw new Exception("CURL扩展没有开启!");
                }
                $curl = curl_init();
                $curl = HttpConnection::buildHttpRequest($curl, $url, $heads);
                //启用时会发送一个常规的POST请求，类型为：application/x-www-form-urlencoded，就像表单提交的一样。
                curl_setopt($curl, CURLOPT_POST, 1);
                // 提交post请求
                curl_setopt($curl, CURLOPT_POSTFIELDS, $data);
                $output = curl_exec($curl);
                if ($output === false) {
                    $res = array(
                        "code" => 1001,
                        "message" => curl_error($curl)
                    );
                    $output = json_encode($res);
                }
                // 关闭CRUL
                curl_close($curl);
            } catch (Exception $exc) {
                // 关闭CRUL
                curl_close($curl);
                $res = array(
                    "code" => 1001,
                    "message" => $exc->getMessage()
                );
                $output = json_encode($res);
            }
            if($output){
                break;
            }
            $flag++;
        }
        return $output;
    }

    /**
     * POST请求带有多文件(请求中非多文件请求，仅单文件请求，使用 doPost)
     * @param $url
     * @param $heads
     * @param $data
     * @param $files
     * @return mixed|string
     */
    function doPostWithFiles($url, $heads, $paramData, $lisFiles){
        $flag=1;
        while($flag <= HttpConnection::RENNECT_TIMES) {
            try {
                if (!function_exists('curl_init')) {
                    throw new Exception("CURL扩展没有开启!");
                }
                $boundary = "----sdkboundary".uniqid();
                $data = '';
                // 文本参数组成
                if ($paramData && is_array($paramData)) {
                    foreach ($paramData as $name => $value) {
                        $paramEntry = getParamEntry($boundary, $name, $value);
                        $data .= $paramEntry;
                    }
                }
                // 批量文件参数组成
                if ($lisFiles && is_array($lisFiles)) {
                    foreach ($lisFiles as $name => $files) {
                        if (is_array($files)) {
                            foreach ($files as $file) {
                                $fileEntry = getFileEntry($boundary, $name, $file->postname, $file->mime, $file);
                                $data .= $fileEntry;
                            }
                        }
                    }
                }
                $data .= "--".$boundary."--\r\n";

                $curl = curl_init();
                if (is_array($heads)) {
                    array_push($heads, "Content-Type: multipart/form-data; boundary=".$boundary);
                    array_push($heads,"Content-Length: ".strlen($data));
                }
                $curl = HttpConnection::buildHttpRequest($curl, $url, $heads);
                //启用时会发送一个常规的POST请求，类型为：application/form-urlencoded，就像表单提交的一样。
                curl_setopt($curl, CURLOPT_POST, 1);

                // 提交post请求
                curl_setopt($curl, CURLOPT_POSTFIELDS, $data);
                $output = curl_exec($curl);
                if ($output === false) {
                    $res = array(
                        "code" => 1001,
                        "message" => curl_error($curl)
                    );
                    $output = json_encode($res);
                }
                // 关闭CRUL
                curl_close($curl);
            } catch (Exception $exc) {
                // 关闭CRUL
                curl_close($curl);
                $res = array(
                    "code" => 1001,
                    "message" => $exc->getMessage()
                );
                $output = json_encode($res);
            }
            if($output){
                break;
            }
            $flag++;
        }
        return $output;
    }

    function getParamEntry($boundary, $fieldName, $fieldValue) {
        return "--".$boundary."\r\nContent-Disposition:form-data;name=\"".$fieldName."\"\r\n\r\n".$fieldValue."\r\n";
    }

    function getFileEntry($boundary, $fieldName, $fileName, $mimeType, $file) {
        if (!$mimeType) {
            $mimeType = "application/octet-stream";
        }
        $upload = file_get_contents($file->name);
        return "--".$boundary."\r\nContent-Disposition:form-data;name=\"".$fieldName."\";filename=\"".$fileName."\"\r\nContent-Type:".$mimeType."\r\n\r\n".$upload."\r\n";
    }