PHP http请求模拟类

<?php
class http {
	private $host;
	private $port = 80;
	private $path;
	private $timeout;
	private $method;
	private $data;
	private $length;
	private $fp;
	

	public function __construct($url = '', $method = 'GET', $data = '', $timeout = 60) {
		if ($url != '') {
			$this->setUrl($url);
		}
		$this->setMethod($method);
		$this->setData($data);
		$this->setTimeout($timeout);
	}

	public function setUrl($url) {
		$parseArr = parse_url($url);
		if (isset($parseArr['host'])) {
			$this->host = $parseArr['host'];
		}
		if (isset($parseArr['port'])) {
			$this->port = $parseArr['port'];
		}
		if (isset($parseArr['path'])) {
			$this->path = $parseArr['path'];
		} else {
			$this->path = "/";
		}
		if (isset($parseArr['query'])) {
			$this->path .= $parseArr['query'];
		}
	}

	public function setTimeout($timeout) {
		$this->timeout = $timeout;
	}

	public function setMethod($method) {
		$this->method = strtoupper($method);	
	}

	public function setData($data) {
		$this->data = $data;
		$this->length = strlen($this->data);
	}

	public function execute() {
		$this->fp = fsockopen($this->host, $this->port, $errno, $errstr, $this->timeout);
		if (!$this->fp) {
			throw new Exception("{$errstr} : {$errno}");
		}
		stream_set_blocking($this->fp, 0);
		stream_set_timeout($this->fp, $this->timeout);
		if (strcmp($this->method, 'GET') === 0) {
			$this->get();
		} else {
			$this->post();
		}
		while (!feof($this->fp)) {
			if (($header = fgets($this->fp)) && ($header == "\r\n" || $header == "\n")) {
				break;
			}
		}
		$body = '';
		while (!feof($this->fp)) {
			$body .= fgets($this->fp, 4096);
		}
		fclose($this->fp);
		return $body;
	}

	public function get() {
		fwrite($this->fp, "{$this->method} {$this->path} HTTP/1.1\r\n");
		fwrite($this->fp, "Accept: */*\r\n");
		fwrite($this->fp, "Host: {$this->host}\r\n");
		fwrite($this->fp, "Connection: Close\r\n\r\n");
	}

	public function post() {
		fwrite($this->fp, "{$this->method} {$this->path} HTTP/1.1\r\n");
		fwrite($this->fp, "Accept: */*\r\n");
		fwrite($this->fp, "Content-Type: application/x-www-form-urlencoded\r\n");
		fwrite($this->fp, "Host: {$this->host}\r\n");
		fwrite($this->fp, "Content-Length: {$this->length}\r\n");
		fwrite($this->fp, "Connection: Close\r\n");
		fwrite($this->fp, "Cache-Control: no-cache\r\n\r\n");
		fwrite($this->fp, $this->data);
	}
}

?>