php - 使用 PHP 获取原始请求

Question

我正在寻找一种方法，使用 native PHP 获取我的脚本收到的原始 HTTP 请求，包括 header 和正文。阅读 PHP 文档，无论使用何种 HTTP 方法，我都找不到获取原始请求的标准方法。

例如，当请求页面 test.php 时，我想获取完整的请求，如下所示:

GET /test.php HTTP/1.1
Host:....
....
....

在 POST、HEAD 等情况下也是如此......

似乎很奇怪，不存在访问原始请求缓冲区的方法!

Answer 1

查看手册似乎没有未解析的原始访问请求以匹配您想要的内容，因此我怀疑您需要从 $_SERVER 重新构建您想要的内容> 变量。快速搜索我找到了这个类，做了一些小改动以获得 GET/HTTP/1.1，也许你会发现它适合你的需要。

<?php
/**
* Access the HTTP Request
* 
* Found on http://www.daniweb.com/web-development/php/code/216846/get-http-request-headers-and-body
*/
class http_request {

    /** additional HTTP headers not prefixed with HTTP_ in $_SERVER superglobal */
    public $add_headers = array('CONTENT_TYPE', 'CONTENT_LENGTH');

    /**
    * Construtor
    * Retrieve HTTP Body
    * @param Array Additional Headers to retrieve
    */
    function http_request($add_headers = false) {

        $this->retrieve_headers($add_headers);
        $this->body = @file_get_contents('php://input');
    }

    /**
    * Retrieve the HTTP request headers from the $_SERVER superglobal
    * @param Array Additional Headers to retrieve
    */
    function retrieve_headers($add_headers = false) {

        if ($add_headers) {
            $this->add_headers = array_merge($this->add_headers, $add_headers);
        }

        if (isset($_SERVER['HTTP_METHOD'])) {
            $this->method = $_SERVER['HTTP_METHOD'];
            unset($_SERVER['HTTP_METHOD']);
        } else {
            $this->method = isset($_SERVER['REQUEST_METHOD']) ? $_SERVER['REQUEST_METHOD'] : false;
        }
        $this->protocol = isset($_SERVER['SERVER_PROTOCOL']) ? $_SERVER['SERVER_PROTOCOL'] : false;
        $this->request_method = isset($_SERVER['REQUEST_METHOD']) ? $_SERVER['REQUEST_METHOD'] : false;

        $this->headers = array();
        foreach($_SERVER as $i=>$val) {
            if (strpos($i, 'HTTP_') === 0 || in_array($i, $this->add_headers)) {
                $name = str_replace(array('HTTP_', '_'), array('', '-'), $i);
                $this->headers[$name] = $val;
            }
        }
    }

    /** 
    * Retrieve HTTP Method
    */
    function method() {
        return $this->method;
    }

    /** 
    * Retrieve HTTP Body
    */
    function body() {
        return $this->body;
    }

    /** 
    * Retrieve an HTTP Header
    * @param string Case-Insensitive HTTP Header Name (eg: "User-Agent")
    */
    function header($name) {
        $name = strtoupper($name);
        return isset($this->headers[$name]) ? $this->headers[$name] : false;
    }

    /**
    * Retrieve all HTTP Headers 
    * @return array HTTP Headers
    */
    function headers() {
        return $this->headers;
    }

    /**
    * Return Raw HTTP Request (note: This is incomplete)
    * @param bool ReBuild the Raw HTTP Request
    */
    function raw($refresh = false) {
        if (isset($this->raw) && !$refresh) {
            return $this->raw; // return cached
        }
        $headers = $this->headers();
        $this->raw = "{$this->method} {$_SERVER['REQUEST_URI']} {$this->protocol}\r\n";

        foreach($headers as $i=>$header) {
                $this->raw .= "$i: $header\r\n";
        }
        $this->raw .= "\r\n{$this->body}";
        return $this->raw;
    }

}

/**
* Example Usage
* Echos the HTTP Request back to the client/browser
*/
$http_request = new http_request();

$resp = $http_request->raw();

echo nl2br($resp);
/* Result (less <br> tags)
    GET / HTTP/1.1
    HOST: localhost:8080
    USER-AGENT: Mozilla/5.0 ...
    ACCEPT: text/html,application/xhtml+xml,application/xml;...
    ACCEPT-LANGUAGE: en-US,en;q=0.5
    ACCEPT-ENCODING: gzip, deflate
    DNT: 1
    COOKIE: PHPSESSID=...
    CONNECTION: keep-alive
*/
?>

P.S: 不要忘记 htmlentities() 它们输出值 :)