出自ProgWiki
用途
- 在 Web-Server端以PHP實做 Get 或 Post 遠端 Web-Server的表單。
程式碼
<?php
/*
class HttpClient
工作環境
PHP5
(如需使用 https 連線的話, 須在php上先裝 OpenSSL模組)
參考資料
RFC 2616
Hypertext Transfer Protocol -- HTTP/1.1
http://www.w3.org/Protocols/rfc2616/rfc2616.html
function HttpRequest 原始出處
http://www.webdeveloper.com/forum/archive/index.php/t-117095.html
*/
#常數定義
define( "CRLF", "\r\n" );
class HttpClient
{
# 成員變數
var $debug;
# 建構子
function __construct()
{
# 測試用
#$this->debug = true;
# 正式用
$this->debug = false;
}
# 解構子
function __destruct()
{
}
/*
用途:
Debug 用訊息
函數傳入值:
依傳入的參數的數量, 自動換行
*/
function DebugOut()
{
if ($this->debug == true)
{
$numargs = func_num_args();
$arg_list = func_get_args();
for ($i = 0; $i < $numargs; $i++)
{
$s = $arg_list[$i];
if (is_object($s))
{
var_dump($s);
echo "\n";
}
else if (is_array($s))
{
print_r($s);
echo "\n";
}
else
{
echo $s."\n";
}
}
}
}
/*
用途:
Http Request用
函數傳入值:
$url = 網址
$method = 操作模式 ('GET'或'POST')
$data = 傳入的參數 (NULL, 或以array方式傳入)
$additional_headers = 傳送自訂的http檔頭
$followRedirects = 是否支援自動轉址
函數傳回值:
該網址回傳的結果 (字串的array)
*/
function HttpRequest( $url, $method = "GET", $data = NULL, $additional_headers = NULL, $followRedirects = true )
{
# in compliance with the RFC 2616 post data will not redirected
$method = strtoupper($method);
$url_parsed = @parse_url($url);
if (!@$url_parsed['scheme'])
$url_parsed = @parse_url('http://'.$url);
# debug用
$this->DebugOut($url_parsed);
# $url_parsed 的 array 展開成 $scheme, $host, $port, $user, $pass, $path, $query, $fragment
extract($url_parsed);
# 表單資料編碼
$FormData = NULL;
if(is_array($data))
{
$ampersand = '';
$temp = NULL;
foreach($data as $k => $v)
{
if ($k != "0")
{
$temp .= $ampersand.urlencode($k).'='.urlencode($v);
$ampersand = '&';
}
}
$FormData = $temp;
}
# fix連線的Port
if(!@$port)
{
if ($scheme == "https")
$port = 443;
else
$port = 80;
}
if (!@$path)
$path = '/';
if (($method == "GET") and (@$FormData))
$path .= (@$query) ? ("&".$FormData) : ("?".$FormData);
# debug用
$this->DebugOut($path);
$out = "$method $path {$_SERVER['SERVER_PROTOCOL']}".CRLF;
$out .= "Host: $host".CRLF;
if ($method == "POST")
{
$out .= "Content-type: application/x-www-form-urlencoded".CRLF;
$out .= "Content-length: ".@strlen($FormData).CRLF;
}
if (@$additional_headers)
{
if (is_array( $this->requestHeaders) )
{
foreach( $this->requestHeaders as $k => $v )
{
$out .= "$k: $v".CRLF;
}
}
else
{
$out .= $additional_headers.CRLF;
}
}
$out .= "Connection: Close".CRLF.CRLF;
if ($method == "POST")
$out .= $FormData.CRLF;
# debug用
$this->DebugOut($out);
# https 網址連線修正
$RemoteHost = ($scheme == "https" ? "ssl://" : "").$host;
# Get the IP address for the target host.
$address = gethostbyname($host);
# debug用
$this->DebugOut("fsockopen() Connect to Host:".$RemoteHost." (IP:".$address.") Port:".$port);
if(!$fp = @fsockopen($RemoteHost, $port, $errno, $errstr, 15))
{
# debug用
$this->DebugOut("fsockopen() Connection Error. Error($errno) $errstr\n");
return false;
}
fwrite($fp, $out);
$foundBody = false;
$header = "";
$body = "";
while (!feof($fp))
{
$s = fgets($fp, 4096);
# debug用
$this->DebugOut($s);
if ( $s == CRLF )
{
$foundBody = true;
continue;
}
if ( $foundBody )
{
$body .= $s;
}
else
{
#echo $s;
if( ($followRedirects) and (preg_match('/^Location:(.*)/i', $s, $matches) != false) )
{
fclose($fp);
if (strpos(trim($matches[1]), 'http') === false)
{
$urlTo = trim($matches[1]);
$urlLocation = ($scheme == 'https' ? 'https://' : 'http://').($host).(substr($urlTo, 0, 1) == '/' ? '' : '/').($urlTo);
return $this->HttpRequest( $urlLocation );
}
else
return $this->HttpRequest( trim($matches[1]) );
}
$header .= $s;
if(preg_match('@HTTP[/]1[.][01x][\s]{1,}([1-5][01][0-9])[\s].*$@', $s, $matches))
{
$status = trim($matches[1]);
}
}
}
fclose($fp);
return array('head' => trim($header), 'body' => trim($body), 'status' => $status);
}
/*
用途:
Http Response Header Fields拆解用
函數傳入值:
$header = Http Response Header
例
HTTP/1.1 200 OK
Date: Tue, 23 Jan 2007 05:41:08 GMT
Server: Apache/2.0.54 (Unix) DAV/2
Last-Modified: Fri, 30 Jun 2006 07:16:29 GMT
ETag: "28401-1f-d3c9cd40"
Accept-Ranges: bytes
Content-Length: 31
Connection: close
Content-Type: text/html
函數傳回值:
該網址回傳的結果 (字串的array)
*/
function parse_header($header)
{
$out = NULL;
$header_data = preg_split('/\r\n/',$header);
if (is_array($header_data))
{
foreach($header_data as $k => $v)
{
$data = preg_split('/: /',$v);
$out[$data[0]] = $data[1];
}
}
return $out;
}
function GetStatusText($status)
{
switch ((int)$status)
{
case 100:
$str = "Continue";
break;
case 101:
$str = "Switching Protocols";
break;
case 200:
$str = "OK";
break;
case 201:
$str = "Created";
break;
case 202:
$str = "Accepted";
break;
case 203:
$str = "Non-Authoritative Information";
break;
case 204:
$str = "No Content";
break;
case 205:
$str = "Reset Content";
break;
case 206:
$str = "Partial Content";
break;
case 300:
$str = "Multiple Choices";
break;
case 301:
$str = "Moved Permanently";
break;
case 302:
$str = "Found";
break;
case 303:
$str = "See Other";
break;
case 304:
$str = "Not Modified";
break;
case 305:
$str = "Use Proxy";
break;
case 307:
$str = "Temporary Redirect";
break;
case 400:
$str = "Bad Request";
break;
case 401:
$str = "Unauthorized";
break;
case 402:
$str = "Payment Required";
break;
case 403:
$str = "Forbidden";
break;
case 404:
$str = "Not Found";
break;
case 405:
$str = "Method Not Allowed";
break;
case 406:
$str = "Not Acceptable";
break;
case 407:
$str = "Proxy Authentication Required";
break;
case 408:
$str = "Request Time-out";
break;
case 409:
$str = "Conflict";
break;
case 410:
$str = "Gone";
break;
case 411:
$str = "Length Required";
break;
case 412:
$str = "Precondition Failed";
break;
case 413:
$str = "Request Entity Too Large";
break;
case 414:
$str = "Request-URI Too Large";
break;
case 415:
$str = "Unsupported Media Type";
break;
case 416:
$str = "Requested range not satisfiable";
break;
case 417:
$str = "Expectation Failed";
break;
case 500:
$str = "Internal Server Error";
break;
case 501:
$str = "Not Implemented";
break;
case 502:
$str = "Bad Gateway";
break;
case 503:
$str = "Service Unavailable";
break;
case 504:
$str = "Gateway Time-out";
break;
case 505:
$str = "HTTP Version not supported";
break;
default:
$str = "Unknow status ".$ststus;
break;
}
return $str;
}
}
?>
使用範例
<?php
include_once('HttpClient.php');
$Client = new HttpClient();
$url = "http://tw.dictionary.yahoo.com/search";
$method = "GET";
$data = array('ei' => 'UTF-8',
'p' => 'run');
$ret = $Client->HttpRequest($url,$method, $data );
echo $ret['body'];
?>
