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PHP 知识管理系统（基于树结构的知识管理系统）, 英文原版的PHP源码。

<?php
/**
 * This file contains the code for a HTTP transport layer.
 *
 * PHP versions 4 and 5
 *
 * LICENSE: This source file is subject to version 2.02 of the PHP license,
 * that is bundled with this package in the file LICENSE, and is available at
 * through the world-wide-web at http://www.php.net/license/2_02.txt.  If you
 * did not receive a copy of the PHP license and are unable to obtain it
 * through the world-wide-web, please send a note to [e-mail] so we can
 * mail you a copy immediately.
 *
 * @category   Web Services
 * @package    SOAP
 * @author     Shane Caraveo <[e-mail]>
 * @copyright  2003-2005 The PHP Group
 * @license    http://www.php.net/license/2_02.txt  PHP License 2.02
 * @link       http://pear.php.net/package/SOAP
 */

/**
 * HTTP Transport class
 *
 * @package  SOAP
 * @category Web_Services
 */

/**
 * Needed Classes
 */
require_once 'SOAP/Base.php';

/**
 *  HTTP Transport for SOAP
 *
 * @access public
 * @package SOAP
 * @author Shane Caraveo <[e-mail]>
 */
class SOAP_Transport_HTTP extends SOAP_Base
{

    /**
     * Basic Auth string.
     *
     * @var array
     */
    var $headers = array();

    /**
     * Cookies.
     *
     * @var array
     */
    var $cookies;

    /**
     * Connection timeout in seconds. 0 = none.
     *
     * @var integer
     */
    var $timeout = 4;

    /**
     * Array containing urlparts - parse_url().
     *
     * @var mixed
     */
    var $urlparts = null;

    /**
     * Connection endpoint - URL.
     *
     * @var string
     */
    var $url = '';

    /**
     * Incoming payload.
     *
     * @var string
     */
    var $incoming_payload = '';

    /**
     * HTTP-Request User-Agent.
     *
     * @var string
     */
    var $_userAgent = SOAP_LIBRARY_NAME;

    /**
     * HTTP encoding.
     *
     * @var string
     */
    var $encoding = SOAP_DEFAULT_ENCODING;

    /**
     * HTTP-Response Content-Type encoding.
     * We assume UTF-8 if no encoding is set.
     *
     * @var string
     */
    var $result_encoding = 'UTF-8';

    /**
     * HTTP-Response Content-Type.
     */
    var $result_content_type;

    var $result_headers = array();

    var $result_cookies = array();

    /**
     * SOAP_Transport_HTTP Constructor
     *
     * @access public
     *
     * @param string $url       HTTP url to SOAP endpoint.
     * @param string $encoding  Encoding to use.
     */
    function SOAP_Transport_HTTP($url, $encoding = SOAP_DEFAULT_ENCODING)
    {
        parent::SOAP_Base('HTTP');
        $this->urlparts = @parse_url($url);
        $this->url = $url;
        $this->encoding = $encoding;
    }

    /**
     * Sends and receives SOAP data.
     *
     * @param string  Outgoing POST data.
     * @param array   Options.
     *
     * @return string|SOAP_Fault
     * @access public
     */
    function send($msg, $options = null)
    {
        if (!$this->_validateUrl()) {
            return $this->fault;
        }

        if (isset($options['timeout'])) {
            $this->timeout = (int)$options['timeout'];
        }

        if (strcasecmp($this->urlparts['scheme'], 'HTTP') == 0) {
            return $this->_sendHTTP($msg, $options);
        } elseif (strcasecmp($this->urlparts['scheme'], 'HTTPS') == 0) {
            return $this->_sendHTTPS($msg, $options);
        }

        return $this->_raiseSoapFault('Invalid url scheme ' . $this->url);
    }

    /**
     * Sets data for HTTP authentication, creates authorization header.
     *
     * @param string $username   Username.
     * @param string $password   Response data, minus HTTP headers.
     *
     * @access public
     */
    function setCredentials($username, $password)
    {
        $this->headers['Authorization'] = 'Basic ' . base64_encode($username . ':' . $password);
    }

    /**
     * Adds a cookie.
     *
     * @access public
     * @param string $name  Cookie name.
     * @param mixed $value  Cookie value.
     */
    function addCookie($name, $value)
    {
        $this->cookies[$name] = $value;
    }

    /**
     * Generates the correct headers for the cookies.
     *
     * @access private
     */
    function _genCookieHeader()
    {
        foreach ($this->cookies as $name=>$value) {
            $cookies = (isset($cookies) ? $cookies. '; ' : '') .
                        urlencode($name) . '=' . urlencode($value);
        }
        return $cookies;
    }

    /**
     * Validate url data passed to constructor.
     *
     * @access private
     * @return boolean
     */
    function _validateUrl()
    {
        if (!is_array($this->urlparts) ) {
            $this->_raiseSoapFault('Unable to parse URL ' . $this->url);
            return false;
        }
        if (!isset($this->urlparts['host'])) {
            $this->_raiseSoapFault('No host in URL ' . $this->url);
            return false;
        }
        if (!isset($this->urlparts['port'])) {
            if (strcasecmp($this->urlparts['scheme'], 'HTTP') == 0) {
                $this->urlparts['port'] = 80;
            } elseif (strcasecmp($this->urlparts['scheme'], 'HTTPS') == 0) {
                $this->urlparts['port'] = 443;
            }

        }
        if (isset($this->urlparts['user'])) {
            $this->setCredentials(urldecode($this->urlparts['user']),
                                  urldecode($this->urlparts['pass']));
        }
        if (!isset($this->urlparts['path']) || !$this->urlparts['path']) {
            $this->urlparts['path'] = '/';
        }

        return true;
    }

    /**
     * Finds out what the encoding is.
     * Sets the object property accordingly.
     *
     * @access private
     * @param array $headers  Headers.
     */
    function _parseEncoding($headers)
    {
        $h = stristr($headers, 'Content-Type');
        preg_match_all('/^Content-Type:\s*(.*)$/im', $h, $ct, PREG_SET_ORDER);
        $n = count($ct);
        $ct = $ct[$n - 1];

        // Strip the string of \r.
        $this->result_content_type = str_replace("\r", '', $ct[1]);

        if (preg_match('/(.*?)(?:;\s?charset=)(.*)/i',
                       $this->result_content_type,
                       $m)) {
            $this->result_content_type = $m[1];
            if (count($m) > 2) {
                $enc = strtoupper(str_replace('"', '', $m[2]));
                if (in_array($enc, $this->_encodings)) {
                    $this->result_encoding = $enc;
                }
            }
        }

        // Deal with broken servers that don't set content type on faults.
        if (!$this->result_content_type) {
            $this->result_content_type = 'text/xml';
        }
    }

    /**
     * Parses the headers.
     *
     * @param array $headers  The headers.
     */
    function _parseHeaders($headers)
    {
        /* Largely borrowed from HTTP_Request. */
        $this->result_headers = array();
        $headers = split("\r?\n", $headers);
        foreach ($headers as $value) {
            if (strpos($value,':') === false) {
                $this->result_headers[0] = $value;
                continue;
            }
            list($name, $value) = split(':', $value);
            $headername = strtolower($name);
            $headervalue = trim($value);
            $this->result_headers[$headername] = $headervalue;

            if ($headername == 'set-cookie') {
                // Parse a SetCookie header to fill _cookies array.
                $cookie = array('expires' => null,
                                'domain'  => $this->urlparts['host'],
                                'path'    => null,
                                'secure'  => false);

                if (!strpos($headervalue, ';')) {
                    // Only a name=value pair.
                    list($cookie['name'], $cookie['value']) = array_map('trim', explode('=', $headervalue));
                    $cookie['name']  = urldecode($cookie['name']);
                    $cookie['value'] = urldecode($cookie['value']);

                } else {
                    // Some optional parameters are supplied.
                    $elements = explode(';', $headervalue);
                    list($cookie['name'], $cookie['value']) = array_map('trim', explode('=', $elements[0]));
                    $cookie['name']  = urldecode($cookie['name']);
                    $cookie['value'] = urldecode($cookie['value']);

                    for ($i = 1; $i < count($elements);$i++) {
                        list($elName, $elValue) = array_map('trim', explode('=', $elements[$i]));
                        if ('secure' == $elName) {
                            $cookie['secure'] = true;