PHP封装的HttpClient类用法实例

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<?php

/*

* Filename: httpclient.php

* Created on 2012-12-21

* Created by RobinTang

* To change the template for this generated file go to

* Window - Preferences - PHPeclipse - PHP - Code Templates

*/

class SinCookie {

public $name; // Cookie名称

public $value; // Cookie值

// 下面三个属性现在未实现

public $expires; // 过期时间

public $path; // 路径

public $domain; // 域

// 从Cookie字符串创建一个Cookie对象

function __construct($s = false) {

if ($s) {

$i1 = strpos($s, '=');

$i2 = strpos($s, ';');

$this->name = trim(substr($s, 0, $i1));

$this->value = trim(substr($s, $i1 +1, $i2 - $i1 -1));

}

}

// 获取Cookie键值对

function getKeyValue() {

return "$this->name=$this->value";

}

}

// 会话上下文

class SinHttpContext {

public $cookies; // 会话Cookies

public $referer; // 前一个页面地址

function __construct() {

$this->cookies = array ();

$this->refrer = "";

}

// 设置Cookie

function cookie($key, $val) {

$ck = new SinCookie();

$ck->name = $key;

$ck->value = $val;

$this->addCookie($ck);

}

// 添加Cookie

function addCookie($ck) {

$this->cookies[$ck->name] = $ck;

}

// 获取Cookies字串，请求时用到

function cookiesString() {

$res = '';

foreach ($this->cookies as $ck) {

$res .= $ck->getKeyValue() . ';';

}

return $res;

}

}

// Http请求对象

class SinHttpRequest {

public $url; // 请求地址

public $method = 'GET'; // 请求方法

public $host; // 主机

public $path; // 路径

public $scheme; // 协议，http

public $port; // 端口

public $header; // 请求头

public $body; // 请求正文

// 设置头

function setHeader($k, $v) {

if (!isset ($this->header)) {

$this->header = array ();

}

$this->header[$k] = $v;

}

// 获取请求字符串

// 包含头和请求正文

// 获取之后直接写socket就行

function reqString() {

$matches = parse_url($this->url);

!isset ($matches['host']) && $matches['host'] = '';

!isset ($matches['path']) && $matches['path'] = '';

!isset ($matches['query']) && $matches['query'] = '';

!isset ($matches['port']) && $matches['port'] = '';

$host = $matches['host'];

$path = $matches['path'] ? $matches['path'] . ($matches['query'] ? '?' . $matches['query'] : '') : '/';

$port = !empty ($matches['port']) ? $matches['port'] : 80;

$scheme = $matches['scheme'] ? $matches['scheme'] : 'http';

$this->host = $host;

$this->path = $path;

$this->scheme = $scheme;

$this->port = $port;

$method = strtoupper($this->method);

$res = "$method $path HTTP/1.1\r\n";

$res .= "Host: $host\r\n";

if ($this->header) {

reset($this->header);

while (list ($k, $v) = each($this->header)) {

if (isset ($v) && strlen($v) > 0)

$res .= "$k: $v\r\n";

}

}

$res .= "\r\n";

if ($this->body) {

$res .= $this->body;

$res .= "\r\n\r\n";

}

return $res;

}

}

// Http响应

class SinHttpResponse {

public $scheme; // 协议

public $stasus; // 状态，成功的时候是ok

public $code; // 状态码，成功的时候是200

public $header; // 响应头

public $body; // 响应正文

function __construct() {

$this->header = array ();

$this->body = null;

}

function setHeader($key, $val) {

$this->header[$key] = $val;

}

}

// HttpClient

class SinHttpClient {

public $keepcontext = true; // 是否维持会话

public $context; // 上下文

public $request; // 请求

public $response; // 响应

public $debug = false;

// 是否在Debug模式，

//为true的时候会打印出请求内容和相同的头部

function __construct() {

$this->request = new SinHttpRequest();

$this->response = new SinHttpResponse();

$this->context = new SinHttpContext();

$this->timeout = 15; // 默认的超时为15s

}

// 清除上一次的请求内容

function clearRequest() {

$this->request->body = '';

$this->request->setHeader('Content-Length', false);

$this->request->setHeader('Content-Type', false);

}

// post方法

// data为请求的数据

// 为键值对的时候模拟表单提交

// 其他时候为数据提交，提交的形式为xml

// 如有其他需求，请自行扩展

function post($url, $data = false) {

$this->clearRequest();

if ($data) {

if (is_array($data)) {

$con = http_build_query($data);

$this->request->setHeader('Content-Type', 'application/x-www-form-urlencoded');

} else {

$con = $data;

$this->request->setHeader('Content-Type', 'text/xml; charset=utf-8');

}

$this->request->body = $con;

$this->request->method = "POST";

$this->request->setHeader('Content-Length', strlen($con));

}

$this->startRequest($url);

}

// get方法

function get($url) {

$this->clearRequest();

$this->request->method = "GET";

$this->startRequest($url);

}

// 该方法为内部调用方法，不用直接调用

function startRequest($url) {

$this->request->url = $url;

if ($this->keepcontext) {

// 如果保存上下文的话设置相关信息

$this->request->setHeader('Referer', $this->context->refrer);

$cks = $this->context->cookiesString();

if (strlen($cks) > 0)

$this->request->setHeader('Cookie', $cks);

}

// 获取请求内容

$reqstring = $this->request->reqString();

if ($this->debug)

echo "Request:\n$reqstring\n";

try {

$fp = fsockopen($this->request->host, $this->request->port, $errno, $errstr, $this->timeout);

} catch (Exception $ex) {

echo $ex->getMessage();

exit (0);

}

if ($fp) {

stream_set_blocking($fp, true);

stream_set_timeout($fp, $this->timeout);

// 写数据

fwrite($fp, $reqstring);

$status = stream_get_meta_data($fp);

if (!$status['timed_out']) { //未超时

// 下面的循环用来读取响应头部

while (!feof($fp)) {

$h = fgets($fp);

if ($this->debug)

echo $h;

if ($h && ($h == "\r\n" || $h == "\n"))

break;

$pos = strpos($h, ':');

if ($pos) {

$k = strtolower(trim(substr($h, 0, $pos)));

$v = trim(substr($h, $pos +1));

if ($k == 'set-cookie') {

// 更新Cookie

if ($this->keepcontext) {

$this->context->addCookie(new SinCookie($v));

}

} else {

// 添加到头里面去

$this->response->setHeader($k, $v);

}

} else {

// 第一行数据

// 解析响应状态

$preg = '/^(\S*) (\S*) (.*)$/';

preg_match_all($preg, $h, $arr);

isset ($arr[1][0]) & $this->response->scheme = trim($arr[1][0]);

isset ($arr[2][0]) & $this->response->stasus = trim($arr[2][0]);

isset ($arr[3][0]) & $this->response->code = trim($arr[3][0]);

}

}

// 获取响应正文长度

$len = (int) $this->response->header['content-length'];

$res = '';

// 下面的循环读取正文

while (!feof($fp) && $len > 0) {

$c = fread($fp, $len);

$res .= $c;

$len -= strlen($c);

}

$this->response->body = $res;

}

// 关闭Socket

fclose($fp);

// 把返回保存到上下文维持中

$this->context->refrer = $url;

}

}

}

// demo

// now let begin test it

$client = new SinHttpClient(); // create a client

$client->get('http://www.baidu.com/'); // get

echo $client->response->body; // echo

?>