《PHP教程：php 利用socket發(fā)送HTTP請求（GET，POST）》要點：
本文介紹了PHP教程：php 利用socket發(fā)送HTTP請求（GET，POST），希望對您有用。如果有疑問，可以聯(lián)系我們。
PHP編程 今天給大家?guī)淼氖侨绾卫胹ocket發(fā)送GET,POST哀求.我借用燕十八老師封裝好的一個Http類給進(jìn)行說明.
PHP編程 在日常編程中相信很多人和我一樣大部分時間是利用瀏覽器向服務(wù)器提出GET,POST哀求,那么可否利用其它方式提出GET,POST哀求呢?答案必然是肯定的.了解過HTTP協(xié)議的人知道,瀏覽器提交哀求的實質(zhì)是向服務(wù)器發(fā)送一個哀求信息,這個哀求信息有哀求行,哀求頭,哀求體(非必須)構(gòu)成.服務(wù)器根據(jù)哀求信息返回一個響應(yīng)信息.連接斷開.
PHP編程? HTTP哀求的格式如下所示：
PHP編程
<request-line>
<headers>
<blank line>
[<request-body>]
PHP編程 HTTP響應(yīng)的格式與哀求的格式十分相似：
PHP編程
<status-line>
<headers>
<blank line>
[<response-body>]
PHP編程 我們可以利用HTTP發(fā)送哀求的原理,可以重新考慮利用socket發(fā)送HTTP哀求.
PHP編程 Socket的英文原義是“孔”或“插座”.通常也稱作“套接字”,用于描述IP地址和端口,是一個通信鏈的句柄,可以用來實現(xiàn)不同虛擬機或不同計算機之間的通信.在Internet上的主機一般運行了多個服務(wù)軟件,同時提供幾種服務(wù).每種服務(wù)都打開一個Socket,并綁定到一個端口上,不同的端口對應(yīng)于不同的服務(wù).如此看來,其實利用socket操作遠(yuǎn)程文件和讀寫本地的文件一樣容易,把本地文件看成通過硬件傳輸,遠(yuǎn)程文件通過網(wǎng)線傳輸就行了.
PHP編程 因而可以將發(fā)送哀求的考慮成 建立連接->打開socket接口(fsockopen())->寫入哀求(fwrite())->讀出響應(yīng)(fread()->關(guān)閉文件(fclose()).話不多說,直接上代碼：
PHP編程
<?php
interface Proto {
// 連接url
function conn($url);
//發(fā)送get查詢
function get();
// 發(fā)送post查詢
function post();
// 關(guān)閉連接
function close();
}
class Http implements Proto {
const CRLF = "\r\n";
protected $errno = -1;
protected $errstr = '';
protected $response = '';
protected $url = null;
protected $version = 'HTTP/1.1';
protected $fh = null;
protected $line = array();
protected $header = array();
protected $body = array();
public function __construct($url) {
$this->conn($url);
$this->setHeader('Host: ' . $this->url['host']);
}
// 此方法負(fù)責(zé)寫哀求行
protected function setLine($method) {
$this->line[0] = $method . ' ' . $this->url['path'] . '?' .$this->url['query'] . ' '. $this->version;
}
// 此方法負(fù)責(zé)寫頭信息
public function setHeader($headerline) {
$this->header[] = $headerline;
}
// 此方法負(fù)責(zé)寫主體信息
protected function setBody($body) {
$this->body[] = http_build_query($body);
}
// 連接url
public function conn($url) {
$this->url = parse_url($url);
// 判斷端口
if(!isset($this->url['port'])) {
$this->url['port'] = 80;
}
// 判斷query
if(!isset($this->url['query'])) {
$this->url['query'] = '';
}
$this->fh = fsockopen($this->url['host'],$this->url['port'],$this->errno,$this->errstr,3);
}
//構(gòu)造get哀求的數(shù)據(jù)
public function get() {
$this->setLine('GET');
$this->request();
return $this->response;
}
// 構(gòu)造post查詢的數(shù)據(jù)
public function post($body = array()) {
$this->setLine('POST');
// 設(shè)計content-type
$this->setHeader('Content-type: application/x-www-form-urlencoded');
// 設(shè)計主體信息,比GET不一樣的地方
$this->setBody($body);
// 計算content-length
$this->setHeader('Content-length: ' . strlen($this->body[0]));
$this->request();
return $this->response;
}
// 真正哀求
public function request() {
// 把哀求行,頭信息,實體信息 放在一個數(shù)組里,便于拼接
$req = array_merge($this->line,$this->header,array(''),$this->body,array(''));
//print_r($req);
$req = implode(self::CRLF,$req);
//echo $req; exit;
fwrite($this->fh,$req);
while(!feof($this->fh)) {
$this->response .= fread($this->fh,1024);
}
$this->close(); // 關(guān)閉連接
}
// 關(guān)閉連接
public function close() {
fclose($this->fh);
}
}
PHP編程????? 利用此類發(fā)送一個簡單的GET哀求：
PHP編程
<?php
//記得引用Http類
$url="";
$http=new Http($url);
$response=$http->get();
print_r($response);
PHP編程 返回值為信息,可以對響應(yīng)信息進(jìn)行進(jìn)一步處理,得到自己想得到的內(nèi)容.
PHP編程我們來看下一個具體的實例
PHP編程
<?php
/**
* 使用PHP Socket 編程模擬Http post和get哀求
* @author koma
*/
class Http{
private $sp = "\r\n"; //這里必須要寫成雙引號
private $protocol = 'HTTP/1.1';
private $requestLine = "";
private $requestHeader = "";
private $requestBody = "";
private $requestInfo = "";
private $fp = null;
private $urlinfo = null;
private $header = array();
private $body = "";
private $responseInfo = "";
private static $http = null; //Http對象單例
private function __construct() {}
public static function create() {
if ( self::$http === null ) {
self::$http = new Http();
}
return self::$http;
}
public function init($url) {
$this->parseurl($url);
$this->header['Host'] = $this->urlinfo['host'];
return $this;
}
public function get($header = array()) {
$this->header = array_merge($this->header, $header);
return $this->request('GET');
}
public function post($header = array(), $body = array()) {
$this->header = array_merge($this->header, $header);
if ( !empty($body) ) {
$this->body = http_build_query($body);
$this->header['Content-Type'] = 'application/x-www-form-urlencoded';
$this->header['Content-Length'] = strlen($this->body);
}
return $this->request('POST');
}
private function request($method) {
$header = "";
$this->requestLine = $method.' '.$this->urlinfo['path'].'?'.$this->urlinfo['query'].' '.$this->protocol;
foreach ( $this->header as $key => $value ) {
$header .= $header == "" ? $key.':'.$value : $this->sp.$key.':'.$value;
}
$this->requestHeader = $header.$this->sp.$this->sp;
$this->requestInfo = $this->requestLine.$this->sp.$this->requestHeader;
if ( $this->body != "" ) {
$this->requestInfo .= $this->body;
}
/*
* 注意：這里的fsockopen中的url參數(shù)形式為"www.xxx.com"
* 不能夠帶"http://"這種
*/
$port = isset($this->urlinfo['port']) ? isset($this->urlinfo['port']) : '80';
$this->fp = fsockopen($this->urlinfo['host'], $port, $errno, $errstr);
if ( !$this->fp ) {
echo $errstr.'('.$errno.')';
return false;
}
if ( fwrite($this->fp, $this->requestInfo) ) {
$str = "";
while ( !feof($this->fp) ) {
$str .= fread($this->fp, 1024);
}
$this->responseInfo = $str;
}
fclose($this->fp);
return $this->responseInfo;
}
private function parseurl($url) {
$this->urlinfo = parse_url($url);
}
}
// $url = "http://news.163.com/14/1102/01/AA0PFA7Q00014AED.html";
$url = "http://localhost/httppro/post.php";
$http = Http::create()->init($url);
/* 發(fā)送get哀求
echo $http->get(array(
'User-Agent' => 'Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/35.0.1916.153 Safari/537.36',
));
*/
/* 發(fā)送post哀求 */
echo $http->post(array(
'User-Agent' => 'Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/35.0.1916.153 Safari/537.36',
), array('username'=>'發(fā)一個中文', 'age'=>22));
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