Snooy 类网页抓取

最新推荐文章于 2021-03-21 12:53:55 发布

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最新推荐文章于 2021-03-21 12:53:55 发布

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<?php
// ============Snoopy 网页抓取======================
// 使用方式： http://www.itokit.com/2011/1105/72479.html
$snoopy = new Snoopy;
$url = "http://www.baidu.com";
$snoopy->fetch($url); //获取所有内容 fetch
$contents = $snoopy->results; //显示结果
echo $contents;
?>
<?php
// =================Snoopy.class.php==============
/*************************************************
*
* Snoopy - the PHP net client
* Author: Monte Ohrt <monte@ohrt.com>
* Version: 2.0.0
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
* You may contact the author of Snoopy by e-mail at:
* monte@ohrt.com
*
* The latest version of Snoopy can be obtained from:
* http://snoopy.sourceforge.net/
*************************************************/
class Snoopy
{
/**** Public variables ****/
/* user definable vars */
var $scheme = 'http'; // http or https
var $host = "www.php.net"; // host name we are connecting to
var $port = 80; // port we are connecting to
var $proxy_host = ""; // proxy host to use
var $proxy_port = ""; // proxy port to use
var $proxy_user = ""; // proxy user to use
var $proxy_pass = ""; // proxy password to use
var $agent = "Snoopy v2.0.0"; // agent we masquerade as
var $referer = ""; // referer info to pass
var $cookies = array(); // array of cookies to pass
// $cookies["username"]="joe";
var $rawheaders = array(); // array of raw headers to send
// $rawheaders["Content-type"]="text/html";
var $maxredirs = 5; // http redirection depth maximum. 0 = disallow
var $lastredirectaddr = ""; // contains address of last redirected address
var $offsiteok = true; // allows redirection off-site
var $maxframes = 0; // frame content depth maximum. 0 = disallow
var $expandlinks = true; // expand links to fully qualified URLs.
// this only applies to fetchlinks()
// submitlinks(), and submittext()
var $passcookies = true; // pass set cookies back through redirects
// NOTE: this currently does not respect
// dates, domains or paths.
var $user = ""; // user for http authentication
var $pass = ""; // password for http authentication
// http accept types
var $accept = "image/gif, image/x-xbitmap, image/jpeg, image/pjpeg, */*";
var $results = ""; // where the content is put
var $error = ""; // error messages sent here
var $response_code = ""; // response code returned from server
var $headers = array(); // headers returned from server sent here
var $maxlength = 500000; // max return data length (body)
var $read_timeout = 0; // timeout on read operations, in seconds
// supported only since PHP 4 Beta 4
// set to 0 to disallow timeouts
var $timed_out = false; // if a read operation timed out
var $status = 0; // http request status
var $temp_dir = "/tmp"; // temporary directory that the webserver
// has permission to write to.
// under Windows, this should be C:\temp
var $curl_path = false;
// deprecated, snoopy no longer uses curl for https requests,
// but instead requires the openssl extension.
// send Accept-encoding: gzip?
var $use_gzip = true;
// file or directory with CA certificates to verify remote host with
var $cafile;
var $capath;
/**** Private variables ****/
var $_maxlinelen = 4096; // max line length (headers)
var $_httpmethod = "GET"; // default http request method
var $_httpversion = "HTTP/1.0"; // default http request version
var $_submit_method = "POST"; // default submit method
var $_submit_type = "application/x-www-form-urlencoded"; // default submit type
var $_mime_boundary = ""; // MIME boundary for multipart/form-data submit type
var $_redirectaddr = false; // will be set if page fetched is a redirect
var $_redirectdepth = 0; // increments on an http redirect
var $_frameurls = array(); // frame src urls
var $_framedepth = 0; // increments on frame depth
var $_isproxy = false; // set if using a proxy server
var $_fp_timeout = 30; // timeout for socket connection
/*======================================================================*\
Function: fetch
Purpose: fetch the contents of a web page
(and possibly other protocols in the
future like ftp, nntp, gopher, etc.)
Input: $URI the location of the page to fetch
Output: $this->results the output text from the fetch
\*======================================================================*/
function fetch($URI)
{
$URI_PARTS = parse_url($URI);
if (!empty($URI_PARTS["user"]))
$this->user = $URI_PARTS["user"];
if (!empty($URI_PARTS["pass"]))
$this->pass = $URI_PARTS["pass"];
if (empty($URI_PARTS["query"]))
$URI_PARTS["query"] = '';
if (empty($URI_PARTS["path"]))
$URI_PARTS["path"] = '';
$fp = null;
switch (strtolower($URI_PARTS["scheme"])) {
case "https":
if (!extension_loaded('openssl')) {
trigger_error("openssl extension required for HTTPS", E_USER_ERROR);
exit;
}
$this->port = 443;
case "http":
$this->scheme = strtolower($URI_PARTS["scheme"]);
$this->host = $URI_PARTS["host"];
if (!empty($URI_PARTS["port"]))
$this->port = $URI_PARTS["port"];
if ($this->_connect($fp)) {
if ($this->_isproxy) {
// using proxy, send entire URI
$this->_httprequest($URI, $fp, $URI, $this->_httpmethod);
} else {
$path = $URI_PARTS["path"] . ($URI_PARTS["query"] ? "?" . $URI_PARTS["query"] : "");
// no proxy, send only the path
$this->_httprequest($path, $fp, $URI, $this->_httpmethod);
}
$this->_disconnect($fp);
if ($this->_redirectaddr) {
/* url was redirected, check if we've hit the max depth */
if ($this->maxredirs > $this->_redirectdepth) {
// only follow redirect if it's on this site, or offsiteok is true
if (preg_match("|^https?://" . preg_quote($this->host) . "|i", $this->_redirectaddr) || $this->offsiteok) {
/* follow the redirect */
$this->_redirectdepth++;
$this->lastredirectaddr = $this->_redirectaddr;
$this->fetch($this->_redirectaddr);
}
}
}
if ($this->_framedepth < $this->maxframes && count($this->_frameurls) > 0) {
$frameurls = $this->_frameurls;
$this->_frameurls = array();
while (list(, $frameurl) = each($frameurls)) {
if ($this->_framedepth < $this->maxframes) {
$this->fetch($frameurl);
$this->_framedepth++;
} else
break;
}
}
} else {
return false;
}
return $this;
break;
default:
// not a valid protocol
$this->error = 'Invalid protocol "' . $URI_PARTS["scheme"] . '"\n';
return false;
break;
}
return $this;
}
/*======================================================================*\
Function: submit
Purpose: submit an http(s) form
Input: $URI the location to post the data
$formvars the formvars to use.
format: $formvars["var"] = "val";
$formfiles an array of files to submit
format: $formfiles["var"] = "/dir/filename.ext";
Output: $this->results the text output from the post
\*======================================================================*/
function submit($URI, $formvars = "", $formfiles = "")
{
unset($postdata);
$postdata = $this->_prepare_post_body($formvars, $formfiles);
$URI_PARTS = parse_url($URI);
if (!empty($URI_PARTS["user"]))
$this->user = $URI_PARTS["user"];
if (!empty($URI_PARTS["pass"]))
$this->pass = $URI_PARTS["pass"];
if (empty($URI_PARTS["query"]))
$URI_PARTS["query"] = '';
if (empty($URI_PARTS["path"]))
$URI_PARTS["path"] = '';
switch (strtolower($URI_PARTS["scheme"])) {
case "https":
if (!extension_loaded('openssl')) {
trigger_error("openssl extension required for HTTPS", E_USER_ERROR);
exit;
}
$this->port = 443;
case "http":
$this->scheme = strtolower($URI_PARTS["scheme"]);
$this->host = $URI_PARTS["host"];
if (!empty($URI_PARTS["port"]))
$this->port = $URI_PARTS["port"];
if ($this->_connect($fp)) {
if ($this->_isproxy) {
// using proxy, send entire URI
$this->_httprequest($URI, $fp, $URI, $this->_submit_method, $this->_submit_type, $postdata);
} else {
$path = $URI_PARTS["path"] . ($URI_PARTS["query"] ? "?" . $URI_PARTS["query"] : "");
// no proxy, send only the path
$this->_httprequest($path, $fp, $URI, $this->_submit_method, $this->_submit_type, $postdata);
}
$this->_disconnect($fp);
if ($this->_redirectaddr) {
/* url was redirected, check if we've hit the max depth */
if ($this->maxredirs > $this->_redirectdepth) {
if (!preg_match("|^" . $URI_PARTS["scheme"] . "://|", $this->_redirectaddr))
$this->_redirectaddr = $this->_expandlinks($this->_redirectaddr, $URI_PARTS["scheme"] . "://" . $URI_PARTS["host"]);
// only follow redirect if it's on this site, or offsiteok is true
if (preg_match("|^https?://" . preg_quote($this->host) . "|i", $this->_redirectaddr) || $this->offsiteok) {
/* follow the redirect */
$this->_redirectdepth++;
$this->lastredirectaddr = $this->_redirectaddr;
if (strpos($this->_redirectaddr, "?") > 0)
$this->fetch($this->_redirectaddr); // the redirect has changed the request method from post to get
else
$this->submit($this->_redirectaddr, $formvars, $formfiles);
}
}
}
if ($this->_framedepth < $this->maxframes && count($this->_frameurls) > 0) {
$frameurls = $this->_frameurls;
$this->_frameurls = array();
while (list(, $frameurl) = each($frameurls)) {
if ($this->_framedepth < $this->maxframes) {
$this->fetch($frameurl);
$this->_framedepth++;
} else
break;
}
}
} else {
return false;
}
return $this;
break;
default:
// not a valid protocol
$this->error = 'Invalid protocol "' . $URI_PARTS["scheme"] . '"\n';
return false;
break;
}
return $this;
}
/*======================================================================*\
Function: fetchlinks
Purpose: fetch the links from a web page
Input: $URI where you are fetching from
Output: $this->results an array of the URLs
\*======================================================================*/
function fetchlinks($URI)
{
if ($this->fetch($URI) !== false) {
if ($this->lastredirectaddr)
$URI = $this->lastredirectaddr;
if (is_array($this->results)) {
for ($x = 0; $x < count($this->results); $x++)
$this->results[$x] = $this->_striplinks($this->results[$x]);
} else
$this->results = $this->_striplinks($this->results);
if ($this->expandlinks)
$this->results = $this->_expandlinks($this->results, $URI);
return $this;
} else
return false;
}
/*======================================================================*\
Function: fetchform
Purpose: fetch the form elements from a web page
Input: $URI where you are fetching from
Output: $this->results the resulting html form
\*======================================================================*/
function fetchform($URI)
{
if ($this->fetch($URI) !== false) {
if (is_array($this->results)) {
for ($x = 0; $x < count($this->results); $x++)
$this->results[$x] = $this->_stripform($this->results[$x]);
} else
$this->results = $this->_stripform($this->results);
return $this;
} else
return false;
}
/*======================================================================*\
Function: fetchtext
Purpose: fetch the text from a web page, stripping the links
Input: $URI where you are fetching from
Output: $this->results the text from the web page
\*======================================================================*/
function fetchtext($URI)
{
if ($this->fetch($URI) !== false) {
if (is_array($this->results)) {
for ($x = 0; $x < count($this->results); $x++)
$this->results[$x] = $this->_striptext($this->results[$x]);
} else
$this->results = $this->_striptext($this->results);
return $this;
} else
return false;
}
/*======================================================================*\
Function: submitlinks
Purpose: grab links from a form submission
Input: $URI where you are submitting from
Output: $this->results an array of the links from the post
\*======================================================================*/
function submitlinks($URI, $formvars = "", $formfiles = "")
{
if ($this->submit($URI, $formvars, $formfiles) !== false) {
if ($this->lastredirectaddr)
$URI = $this->lastredirectaddr;
if (is_array($this->results)) {
for ($x = 0; $x < count($this->results); $x++) {
$this->results[$x] = $this->_striplinks($this->results[$x]);
if ($this->expandlinks)
$this->results[$x] = $this->_expandlinks($this->results[$x], $URI);
}
} else {
$this->results = $this->_striplinks($this->results);
if ($this->expandlinks)
$this->results = $this->_expandlinks($this->results, $URI);
}
return $this;
} else
return false;
}
/*======================================================================*\
Function: submittext
Purpose: grab text from a form submission
Input: $URI where you are submitting from
Output: $this->results the text from the web page
\*======================================================================*/
function submittext($URI, $formvars = "", $formfiles = "")
{
if ($this->submit($URI, $formvars, $formfiles) !== false) {
if ($this->lastredirectaddr)
$URI = $this->lastredirectaddr;
if (is_array($this->results)) {
for ($x = 0; $x < count($this->results); $x++) {
$this->results[$x] = $this->_striptext($this->results[$x]);
if ($this->expandlinks)
$this->results[$x] = $this->_expandlinks($this->results[$x], $URI);
}
} else {
$this->results = $this->_striptext($this->results);
if ($this->expandlinks)
$this->results = $this->_expandlinks($this->results, $URI);
}
return $this;
} else
return false;
}
/*======================================================================*\
Function: set_submit_multipart
Purpose: Set the form submission content type to
multipart/form-data
\*======================================================================*/
function set_submit_multipart()
{
$this->_submit_type = "multipart/form-data";
return $this;
}
/*======================================================================*\
Function: set_submit_normal
Purpose: Set the form submission content type to
application/x-www-form-urlencoded
\*======================================================================*/
function set_submit_normal()
{
$this->_submit_type = "application/x-www-form-urlencoded";
return $this;
}
/*======================================================================*\
Private functions
\*======================================================================*/
/*======================================================================*\
Function: _striplinks
Purpose: strip the hyperlinks from an html document
Input: $document document to strip.
Output: $match an array of the links
\*======================================================================*/
function _striplinks($document)
{
preg_match_all("'<\s*a\s.*?href\s*=\s* # find <a href=
([\"\'])? # find single or double quote
(?(1) (.*?)\\1 | ([^\s\>]+)) # if quote found, match up to next matching
# quote, otherwise match up to next space
'isx", $document, $links);
// catenate the non-empty matches from the conditional subpattern
while (list($key, $val) = each($links[2])) {
if (!empty($val))
$match[] = $val;
}
while (list($key, $val) = each($links[3])) {
if (!empty($val))
$match[] = $val;
}
// return the links
return $match;
}
/*======================================================================*\
Function: _stripform
Purpose: strip the form elements from an html document
Input: $document document to strip.
Output: $match an array of the links
\*======================================================================*/
function _stripform($document)
{
preg_match_all("'<\/?(FORM|INPUT|SELECT|TEXTAREA|(OPTION))[^<>]*>(?(2)(.*(?=<\/?(option|select)[^<>]*>[\r\n]*)|(?=[\r\n]*))|(?=[\r\n]*))'Usi", $document, $elements);
// catenate the matches
$match = implode("\r\n", $elements[0]);
// return the links
return $match;
}
/*======================================================================*\
Function: _striptext
Purpose: strip the text from an html document
Input: $document document to strip.
Output: $text the resulting text
\*======================================================================*/
function _striptext($document)
{
// I didn't use preg eval (//e) since that is only available in PHP 4.0.
// so, list your entities one by one here. I included some of the
// more common ones.
$search = array("'<script[^>]*?>.*?</script>'si", // strip out javascript
"'<[\/\!]*?[^<>]*?>'si", // strip out html tags
"'([\r\n])[\s]+'", // strip out white space
"'&(quot|#34|#034|#x22);'i", // replace html entities
"'&(amp|#38|#038|#x26);'i", // added hexadecimal values
"'&(lt|#60|#060|#x3c);'i",
"'&(gt|#62|#062|#x3e);'i",
"'&(nbsp|#160|#xa0);'i",
"'&(iexcl|#161);'i",
"'&(cent|#162);'i",
"'&(pound|#163);'i",
"'&(copy|#169);'i",
"'&(reg|#174);'i",
"'&(deg|#176);'i",
"'&(#39|#039|#x27);'",
"'&(euro|#8364);'i", // europe
"'&a(uml|UML);'", // german
"'&o(uml|UML);'",
"'&u(uml|UML);'",
"'&A(uml|UML);'",
"'&O(uml|UML);'",
"'&U(uml|UML);'",
"'ß'i",
);
$replace = array("",
"",
"\\1",
"\"",
"&",
"<",
">",
" ",
chr(161),
chr(162),
chr(163),
chr(169),
chr(174),
chr(176),
chr(39),
chr(128),
"ä",
"ö",
"ü",
"Ä",
"Ö",
"Ü",
"ß",
);
$text = preg_replace($search, $replace, $document);
return $text;
}
/*======================================================================*\
Function: _expandlinks
Purpose: expand each link into a fully qualified URL
Input: $links the links to qualify
$URI the full URI to get the base from
Output: $expandedLinks the expanded links
\*======================================================================*/
function _expandlinks($links, $URI)
{
preg_match("/^[^\?]+/", $URI, $match);
$match = preg_replace("|/[^\/\.]+\.[^\/\.]+$|", "", $match[0]);
$match = preg_replace("|/$|", "", $match);
$match_part = parse_url($match);
$match_root =
$match_part["scheme"] . "://" . $match_part["host"];
$search = array("|^http://" . preg_quote($this->host) . "|i",
"|^(\/)|i",
"|^(?!http://)(?!mailto:)|i",
"|/\./|",
"|/[^\/]+/\.\./|"
);
$replace = array("",
$match_root . "/",
$match . "/",
"/",
"/"
);
$expandedLinks = preg_replace($search, $replace, $links);
return $expandedLinks;
}
/*======================================================================*\
Function: _httprequest
Purpose: go get the http(s) data from the server
Input: $url the url to fetch
$fp the current open file pointer
$URI the full URI
$body body contents to send if any (POST)
Output:
\*======================================================================*/
function _httprequest($url, $fp, $URI, $http_method, $content_type = "", $body = "")
{
$cookie_headers = '';
if ($this->passcookies && $this->_redirectaddr)
$this->setcookies();
$URI_PARTS = parse_url($URI);
if (empty($url))
$url = "/";
$headers = $http_method . " " . $url . " " . $this->_httpversion . "\r\n";
if (!empty($this->host) && !isset($this->rawheaders['Host'])) {
$headers .= "Host: " . $this->host;
if (!empty($this->port) && $this->port != '80')
$headers .= ":" . $this->port;
$headers .= "\r\n";
}
if (!empty($this->agent))
$headers .= "User-Agent: " . $this->agent . "\r\n";
if (!empty($this->accept))
$headers .= "Accept: " . $this->accept . "\r\n";
if ($this->use_gzip) {
// make sure PHP was built with --with-zlib
// and we can handle gzipp'ed data
if (function_exists('gzinflate')) {
$headers .= "Accept-encoding: gzip\r\n";
} else {
trigger_error(
"use_gzip is on, but PHP was built without zlib support." .
" Requesting file(s) without gzip encoding.",
E_USER_NOTICE);
}
}
if (!empty($this->referer))
$headers .= "Referer: " . $this->referer . "\r\n";
if (!empty($this->cookies)) {
if (!is_array($this->cookies))
$this->cookies = (array)$this->cookies;
reset($this->cookies);
if (count($this->cookies) > 0) {
$cookie_headers .= 'Cookie: ';
foreach ($this->cookies as $cookieKey => $cookieVal) {
$cookie_headers .= $cookieKey . "=" . urlencode($cookieVal) . "; ";
}
$headers .= substr($cookie_headers, 0, -2) . "\r\n";
}
}
if (!empty($this->rawheaders)) {
if (!is_array($this->rawheaders))
$this->rawheaders = (array)$this->rawheaders;
while (list($headerKey, $headerVal) = each($this->rawheaders))
$headers .= $headerKey . ": " . $headerVal . "\r\n";
}
if (!empty($content_type)) {
$headers .= "Content-type: $content_type";
if ($content_type == "multipart/form-data")
$headers .= "; boundary=" . $this->_mime_boundary;
$headers .= "\r\n";
}
if (!empty($body))
$headers .= "Content-length: " . strlen($body) . "\r\n";
if (!empty($this->user) || !empty($this->pass))
$headers .= "Authorization: Basic " . base64_encode($this->user . ":" . $this->pass) . "\r\n";
//add proxy auth headers
if (!empty($this->proxy_user))
$headers .= 'Proxy-Authorization: ' . 'Basic ' . base64_encode($this->proxy_user . ':' . $this->proxy_pass) . "\r\n";
$headers .= "\r\n";
// set the read timeout if needed
if ($this->read_timeout > 0)
socket_set_timeout($fp, $this->read_timeout);
$this->timed_out = false;
fwrite($fp, $headers . $body, strlen($headers . $body));
$this->_redirectaddr = false;
unset($this->headers);
// content was returned gzip encoded?
$is_gzipped = false;
while ($currentHeader = fgets($fp, $this->_maxlinelen)) {
if ($this->read_timeout > 0 && $this->_check_timeout($fp)) {
$this->status = -100;
return false;
}
if ($currentHeader == "\r\n")
break;
// if a header begins with Location: or URI:, set the redirect
if (preg_match("/^(Location:|URI:)/i", $currentHeader)) {
// get URL portion of the redirect
preg_match("/^(Location:|URI:)[ ]+(.*)/i", chop($currentHeader), $matches);
// look for :// in the Location header to see if hostname is included
if (!preg_match("|\:\/\/|", $matches[2])) {
// no host in the path, so prepend
$this->_redirectaddr = $URI_PARTS["scheme"] . "://" . $this->host . ":" . $this->port;
// eliminate double slash
if (!preg_match("|^/|", $matches[2]))
$this->_redirectaddr .= "/" . $matches[2];
else
$this->_redirectaddr .= $matches[2];
} else
$this->_redirectaddr = $matches[2];
}
if (preg_match("|^HTTP/|", $currentHeader)) {
if (preg_match("|^HTTP/[^\s]*\s(.*?)\s|", $currentHeader, $status)) {
$this->status = $status[1];
}
$this->response_code = $currentHeader;
}
if (preg_match("/Content-Encoding: gzip/", $currentHeader)) {
$is_gzipped = true;
}
$this->headers[] = $currentHeader;
}
$results = '';
do {
$_data = fread($fp, $this->maxlength);
if (strlen($_data) == 0) {
break;
}
$results .= $_data;
} while (true);
// gunzip
if ($is_gzipped) {
// per http://www.php.net/manual/en/function.gzencode.php
$results = substr($results, 10);
$results = gzinflate($results);
}
if ($this->read_timeout > 0 && $this->_check_timeout($fp)) {
$this->status = -100;
return false;
}
// check if there is a a redirect meta tag
if (preg_match("'<meta[\s]*http-equiv[^>]*?content[\s]*=[\s]*[\"\']?\d+;[\s]*URL[\s]*=[\s]*([^\"\']*?)[\"\']?>'i", $results, $match)) {
$this->_redirectaddr = $this->_expandlinks($match[1], $URI);
}
// have we hit our frame depth and is there frame src to fetch?
if (($this->_framedepth < $this->maxframes) && preg_match_all("'<frame\s+.*src[\s]*=[\'\"]?([^\'\"\>]+)'i", $results, $match)) {
$this->results[] = $results;
for ($x = 0; $x < count($match[1]); $x++)
$this->_frameurls[] = $this->_expandlinks($match[1][$x], $URI_PARTS["scheme"] . "://" . $this->host);
} // have we already fetched framed content?
elseif (is_array($this->results))
$this->results[] = $results;
// no framed content
else
$this->results = $results;
return $this;
}
/*======================================================================*\
Function: setcookies()
Purpose: set cookies for a redirection
\*======================================================================*/
function setcookies()
{
for ($x = 0; $x < count($this->headers); $x++) {
if (preg_match('/^set-cookie:[\s]+([^=]+)=([^;]+)/i', $this->headers[$x], $match))
$this->cookies[$match[1]] = urldecode($match[2]);
}
return $this;
}
/*======================================================================*\
Function: _check_timeout
Purpose: checks whether timeout has occurred
Input: $fp file pointer
\*======================================================================*/
function _check_timeout($fp)
{
if ($this->read_timeout > 0) {
$fp_status = socket_get_status($fp);
if ($fp_status["timed_out"]) {
$this->timed_out = true;
return true;
}
}
return false;
}
/*======================================================================*\
Function: _connect
Purpose: make a socket connection
Input: $fp file pointer
\*======================================================================*/
function _connect(&$fp)
{
if (!empty($this->proxy_host) && !empty($this->proxy_port)) {
$this->_isproxy = true;
$host = $this->proxy_host;
$port = $this->proxy_port;
if ($this->scheme == 'https') {
trigger_error("HTTPS connections over proxy are currently not supported", E_USER_ERROR);
exit;
}
} else {
$host = $this->host;
$port = $this->port;
}
$this->status = 0;
$context_opts = array();
if ($this->scheme == 'https') {
// if cafile or capath is specified, enable certificate
// verification (including name checks)
if (isset($this->cafile) || isset($this->capath)) {
$context_opts['ssl'] = array(
'verify_peer' => true,
'CN_match' => $this->host,
'disable_compression' => true,
);
if (isset($this->cafile))
$context_opts['ssl']['cafile'] = $this->cafile;
if (isset($this->capath))
$context_opts['ssl']['capath'] = $this->capath;
}
$host = 'ssl://' . $host;
}
$context = stream_context_create($context_opts);
if (version_compare(PHP_VERSION, '5.0.0', '>')) {
if($this->scheme == 'http')
$host = "tcp://" . $host;
$fp = stream_socket_client(
"$host:$port",
$errno,
$errmsg,
$this->_fp_timeout,
STREAM_CLIENT_CONNECT,
$context);
} else {
$fp = fsockopen(
$host,
$port,
$errno,
$errstr,
$this->_fp_timeout,
$context);
}
if ($fp) {
// socket connection succeeded
return true;
} else {
// socket connection failed
$this->status = $errno;
switch ($errno) {
case -3:
$this->error = "socket creation failed (-3)";
case -4:
$this->error = "dns lookup failure (-4)";
case -5:
$this->error = "connection refused or timed out (-5)";
default:
$this->error = "connection failed (" . $errno . ")";
}
return false;
}
}
/*======================================================================*\
Function: _disconnect
Purpose: disconnect a socket connection
Input: $fp file pointer
\*======================================================================*/
function _disconnect($fp)
{
return (fclose($fp));
}
/*======================================================================*\
Function: _prepare_post_body
Purpose: Prepare post body according to encoding type
Input: $formvars - form variables
$formfiles - form upload files
Output: post body
\*======================================================================*/
function _prepare_post_body($formvars, $formfiles)
{
settype($formvars, "array");
settype($formfiles, "array");
$postdata = '';
if (count($formvars) == 0 && count($formfiles) == 0)
return;
switch ($this->_submit_type) {
case "application/x-www-form-urlencoded":
reset($formvars);
while (list($key, $val) = each($formvars)) {
if (is_array($val) || is_object($val)) {
while (list($cur_key, $cur_val) = each($val)) {
$postdata .= urlencode($key) . "[]=" . urlencode($cur_val) . "&";
}
} else
$postdata .= urlencode($key) . "=" . urlencode($val) . "&";
}
break;
case "multipart/form-data":
$this->_mime_boundary = "Snoopy" . md5(uniqid(microtime()));
reset($formvars);
while (list($key, $val) = each($formvars)) {
if (is_array($val) || is_object($val)) {
while (list($cur_key, $cur_val) = each($val)) {
$postdata .= "--" . $this->_mime_boundary . "\r\n";
$postdata .= "Content-Disposition: form-data; name=\"$key \"\r\n\r\n";
$postdata .= "$cur_val\r\n";
}
} else {
$postdata .= "--" . $this->_mime_boundary . "\r\n";
$postdata .= "Content-Disposition: form-data; name=\"$key\"\r\n\r\n";
$postdata .= "$val\r\n";
}
}
reset($formfiles);
while (list($field_name, $file_names) = each($formfiles)) {
settype($file_names, "array");
while (list(, $file_name) = each($file_names)) {
if (!is_readable($file_name)) continue;
$fp = fopen($file_name, "r");
$file_content = fread($fp, filesize($file_name));
fclose($fp);
$base_name = basename($file_name);
$postdata .= "--" . $this->_mime_boundary . "\r\n";
$postdata .= "Content-Disposition: form-data; name=\"$field_name\"; filename=\"$base_name\"\r\n\r\n";
$postdata .= "$file_content\r\n";
}
}
$postdata .= "--" . $this->_mime_boundary . "--\r\n";
break;
}
return $postdata;
}
/*======================================================================*\
Function: getResults
Purpose: return the results of a request
Output: string results
\*======================================================================*/
function getResults()
{
return $this->results;
}
}
?>

Snooy 类 网页抓取

Snooy 类网页抓取