php使用file_get_content封装转发请求

php使用file_get_content封装转发请求

2018-12-22

/**
   * * 请求接口数据
   * @param return 返回请求的数据
   */
  public function requestData($apiUrl, $receiveData = [])
  {
    if (empty($apiUrl)) {
      $this->ajaxReturn('url is required');
      return false;
    }

    $successMsg = '请求数据成功';
    $errorMsg = '请求.net接口返回数据为空';

    // http_build_query 转义成查询字符串，如果是转发请求会产生问题，
    // 需要urldecode解码
    $postData = urldecode(http_build_query($receiveData));

    $options = [
      'http' => [
        'method' => 'POST',
        'header' => 'Content-Type: application/x-www-form-urlencoded',
        'content' => $postData
      ]
    ];

    $context = stream_context_create($options);

    $result = file_get_contents($apiUrl, false, $context);

    if ($result) {
      $data = [
        'code' => 200,
        'data' => $result,
        'msg' => $successMsg
      ];
    } else {
      $data = [
        'code' => 404,
        'data' => $result,
        'msg' => $errorMsg
      ];
    }
    return $this->ajaxReturn($data);
  }

其中有两点坑

• http_build_query 生成 URL-encode 之后的请求字符串
  • 这里发生了转码，转发到请求接口可能会报错
• 表单提交的的字符传进行了 escape 转码，转发请求参数前需要进行 htmlspecialcahrs_decode 解码，防止转发的是转码后的字符串，会导致请求数据或提交数据报错

下一步，封装 cUrl 进行请求

遇到问题不去解决，很难受，查看了一下php官方文档手册，总结用curl封装请求

  public function httpGet($url) {
    $curl = curl_init();
    curl_setopt($curl, CURLOPT_RETURNTRANSFER, true);
    curl_setopt($curl, CURLOPT_TIMEOUT, 500);
    // 为保证第三方服务器与微信服务器之间数据传输的安全性，所有微信接口采用https方式调用，必须使用下面2行代码打开ssl安全校验。
    // 如果在部署过程中代码在此处验证失败，请到 http://curl.haxx.se/ca/cacert.pem 下载新的证书判别文件。
    curl_setopt($curl, CURLOPT_SSL_VERIFYPEER, true);
    curl_setopt($curl, CURLOPT_SSL_VERIFYHOST, true);
    curl_setopt($curl, CURLOPT_URL, $url);

    $res = curl_exec($curl);
    curl_close($curl);

    return $res;
  }

简单例子

<?php
// 创建一个新 cURL 资源
$ch = curl_init();

// 设置 URL 和相应的选项
$options = array(CURLOPT_URL => 'http://www.example.com/',
                 CURLOPT_HEADER => false
                );

curl_setopt_array($ch, $options);

// 抓取 URL 并把它传递给浏览器
curl_exec($ch);

// 关闭 cURL 资源，并且释放系统资源
curl_close($ch);
?>

比较不错的封装

<?php 

function httpRquest($url,$method=0,$curl_data ) 
{ 
    if(strtolower($method) == 'post'){
        $method = 1
    }
    $options = array( 
        CURLOPT_RETURNTRANSFER => true,         // return web page 
        CURLOPT_HEADER         => false,        // don't return headers 
        CURLOPT_FOLLOWLOCATION => true,         // follow redirects 
        CURLOPT_ENCODING       => "",           // handle all encodings 
        CURLOPT_USERAGENT      => "Mozilla/5.0 (Windows NT 6.1; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/71.0.3578.98 Safari/537.36",     // who am i 
        CURLOPT_AUTOREFERER    => true,         // set referer on redirect 
        CURLOPT_CONNECTTIMEOUT => 120,          // timeout on connect 
        CURLOPT_TIMEOUT        => 120,          // timeout on response 
        CURLOPT_MAXREDIRS      => 10,           // stop after 10 redirects 
        CURLOPT_POST           => $method,      // i am sending post data 
        CURLOPT_POSTFIELDS     => $curl_data,    // this are my post vars 
        CURLOPT_SSL_VERIFYHOST => 0,            // don't verify ssl 
        CURLOPT_SSL_VERIFYPEER => false,        // 
        CURLOPT_VERBOSE        => 1              // 输出所有的信息，写入到STDERR，
    ); 

    $ch      = curl_init($url); 
    curl_setopt_array($ch,$options); 
    $content = curl_exec($ch); 
    $err     = curl_errno($ch); 
    $errmsg  = curl_error($ch) ; 
    $header  = curl_getinfo($ch); 
    curl_close($ch); 

  //  $header['errno']   = $err; 
  //  $header['errmsg']  = $errmsg; 
  //  $header['content'] = $content; 
    return $header; 
} 

$curl_data = "var1=60&var2=test"; 
$url = "https://www.example.com"; 
$response = get_web_page($url,$curl_data); 

print '<pre>'; 
print_r($response); 

?>