Re: how to include a remote file and change relative links to non-relative
| From: | Aral Balkan | Date: | Wed, 18 Jul 2001 05:39:12 +0000 |
| Subject: | Re: how to include a remote file and change relative links to non-relative | ||
| References: | 1 | Groups: | php.general |
| Request: | Send a blank email to php-general+get-58389@lists.php.net to get a copy of this message | ||
I've been working on Hans Anderson's Browser class and I've adapted it to do
what you're looking for. It's not complete but there should be a lot here
for you to go on. Again, I haven't had time to fine tune things at all so
it's a very rough hack right now. Hope it helps.
The dirty on how to use it:
<?php
require_once ('class_browser.php');
// new browser
$browser = new Browser();
$file_array = $browser->get_url(array(
"url"=>"$file",
"req_mthd"=>'GET',
"protocol"=>'HTTP/1.1',
"robot_rules"=>FALSE
)
);
if ($file_array["errcode"] == 1) {
$file_text = $file_array["content"];
// convert relative links to absolute
$file_text = $browser->translate($file_text, $file);
?>
class_browser.php:
class Browser {
/*
Class Browser by Hans Anderson.
This code is released under the GPL license.
Modifications by Aral Balkan
06.22.01 - Added two new methods:
(1) $string = translate_links($string, $url);
Translates all relative links in argument $string to
absolute links using the full URL to the page being
accessed in the $url argument. Returns the translated
string.
(2) $string = translate_images($string, $url);
Translates all relative image links in argument $string to
absolute links using the full URL to the page being
accessed in the $url argument. Returns the translated
string.
Aral Balkan (aral@aralbalkan.com)
*/
function get_url($array) {
/* defaults (there is no default for 'url' or 'content') */
$robot_rules = TRUE; /* follow the robots.txt standard */
$req_mthd = 'GET';
$protocol = 'HTTP/1.0';
$user_agent = 'PHP3 Browser';
$time_out = 10;
/* for each argument set in the array, overwrite default */
while(list($k,$v) = each($array)) {
$$k=$v;
}
/* set up the cookies. If it exists, the straight variable
will be written above ($$k=$v). */
if(is_array($cookies)) {
$cookies2send = '';
while(list($k,$v) = each($cookies) ) {
$cookies2send .= "Cookie: $k=" . urlencode($v) . "\n";
}
}
if(!isset($url))
return array("content"=>' ',"headers"=>'
',"errcode"=>-1,"errmsg"=>'Fatal
Error: No URL defined');
$parsed_url = parse_url("$url");
if($robot_rules) {
$robots_url = $parsed_url["scheme"] . "://" . $parsed_url["host"];
if($parsed_url["port"]) $robots_url .= ":" . $parsed_url["port"];
$robots_url .= "/robots.txt";
if(!$this->robot_rules($url,$robots_url,$user_agent))
return array("content"=>' ',"headers"=>'
',"errcode"=>0,"errmsg"=>"Non-fatal Error: Robot Rules do not
permit this
browser to access $url");
}
$req_mthd = strtoupper($req_mthd); // 2068 rfc says it's case
sensitive.
$host = $parsed_url["host"];
if(!$host || $host=='' || !isset($host))
array("content"=>' ',"headers"=>'
',"errcode"=>-1,"errmsg"=>'Fatal Error:
No URL defined');
$path = $parsed_url["path"];
if(!$path || $path=='' || !isset($path))
$path = "/";
$query = $parsed_url["query"];
if($query!='')
$path = "$path?$query";
if(!isset($parsed_url["port"])) {
$port = 80;
} else {
$port = $parsed_url["port"];
}
$timeout = time() + $time_out;
$fp = fsockopen("$host",$port,$errno,$errstring,$time_out);
if(!$fp) {
return array("content"=>' ',"headers"=>'
',"errcode"=>0,"errmsg"=>"Non-Fatal Error: Could not make
connection to url
$url (not found in DNS or you are not connected to the Internet)");
} else {
set_socket_blocking($fp,1); // aral: set to 1 for it to work on
Windows & Unix
$REQUEST = "$req_mthd $path $protocol\n";
if(eregi("^HTTP\/1\.[1-9]",$protocol)) $REQUEST .= "Host: $host\n";
$REQUEST .= "User-Agent: $user_agent\n";
if($referer) {
$REQUEST .= "Referer: $referer\n";
}
$REQUEST .= "Connection: close\n";
if($cookies) {
$REQUEST .= $cookies2send;
}
if($req_mthd=="POST") {
$REQUEST .= "Content-length: " . (strlen($content)) . "\n";
$REQUEST .= "Content-type: application/x-www-form-urlencoded\n";
$REQUEST .= "\n$content\n";
}
fputs($fp,"$REQUEST\n"); // complete the request
# print "$REQUEST\n";
if($timeout<time())
return array("content"=>' ',"headers"=>'
',"errcode"=>0,"errmsg"=>"Non-Fatal Error: Timed out while
downloading
page");
while (!feof($fp) && time()<$timeout) {
$output = fgets($fp,255);
$view_output .= $output;
if(!isset($header)) {
if($output=="\n" || $output == "\r\n" || $output == "\n\l") {
$header = $view_output;
$view_output = '';
}
}
}
}
fclose($fp);
if(time()>$timeout)
return
array("content"=>"$content","headers"=>"$headers","errcode"=>0,"errmsg"=>"No
n-Fatal Error: Timed out while downloading page");
return
array("content"=>"$view_output","headers"=>"$header","errcode"=>1,"errmsg"=>
"Success");
} // end function get_url
/* ************************************* */
function get_headers($h) {
$array = explode("\n",$h);
for($i=0;$i<count($array);$i++) {
if( ereg("([A-Za-z]+)/([0-9]\.[0-9]) +([0-9]+)
+([A-Za-z]+)",$array[$i],$r) ) {
$hdrs['version'] = trim($r[2]);
$hdrs['status_code'] = trim($r[3]);
$hdrs['status_text'] = trim($r[4]);
} elseif(ereg("([^:]*): +(.*)",$array[$i],$r)) {
$hdr = eregi_replace("-","_",trim(strtolower($r[1])));
$hdrs[$hdr] = trim($r[2]);
}
}
return $hdrs;
} // end function get_headers
/* ************************************* */
function get_a_header($h,$w) {
$w=strtolower($w);
$array = explode("\n",$h);
for($i=0;$i<count($array);$i++) {
if( ereg("([A-Za-z]+)/([0-9]\.[0-9]) +([0-9]+)
+([A-Za-z]+)",$array[$i],$r) ) {
$hdrs['version'] = $r[2];
$hdrs['status_code'] = $r[3];
$hdrs['status_text'] = $r[4];
} elseif(ereg("([^:]*): +(.*)",$array[$i],$r)) {
$hdr = eregi_replace("-","_",strtolower($r[1]));
$hdrs[$hdr] = $r[2];
}
}
return $hdrs[$w];
} // end function get_a_header
/* ************************************* */
function strip_entities($string) {
return ereg_replace("&[^;]{2,4};"," ",$string);
}
function strip_html($string) {
while(ereg("<[^>]*>",$string)) {
$string = ereg_replace("<[^>]*>"," ",$string);
}
while(ereg("\t+",$string)) {
$string = ereg_replace("\t+"," ",$string);
}
while(ereg("\n+",$string)) {
$string = ereg_replace("\n+"," ",$string);
}
while(ereg("\r+",$string)) {
$string = ereg_replace("\r+"," ",$string);
}
while(ereg("\l\r+",$string)) {
$string = ereg_replace("\l\r+"," ",$string);
}
while(ereg(" {2,}",$string)) {
$string = ereg_replace(" {2,}"," ",$string);
}
return $string;
} // end function strip_tags
/* ************************************* */
function full_time($l=0) {
$microtime = microtime();
return doubleval(substr($microtime,0,10)) + substr($microtime,11,10) +
$l;
}
/* ************************************* */
function get_links($s,$url=''){
if($url) {
$p = parse_url($url);
if($p["port"]) {
$port = ":$p[port]";
} else {
$port = '';
}
}
$copy = $s; // so we can return links and titles in their proper case
$s = strtolower($s); // or else the strstr and strpos searches are case
sensitive...
$pos_start=strpos($s,"<a");
while($pos_start) {
$pos_close = strpos($s,"</a",$pos_start);
if($pos_close) {
$pos_close += 4;
} else {
break;
}
$array[] = substr( $copy , $pos_start , $pos_close-$pos_start );
$pos_start=strpos($s,"<a",$pos_close);
}
for($i=0;$i<count($array);$i++) {
eregi('href *= *"?([^" >]*)"?[^>]*>(.*)</a
*>?',$array[$i],$r);
if($url) {
if(!eregi("^mailto",$r[1])) {
if(eregi("^(f|ht)tp",$r[1])) {
/* full url */
$this_url = $r[1];
} elseif(eregi("^/",$r[1])) {
/* absolute path, but not full url */
$this_url = $p["scheme"] . "://" . $p["host"] . $port . $r[1];
} else {
if($p["path"] == "/" || $p["path"] == '') {
/* relative link, but no url path */
$this_url = $p["scheme"] . "://" . $p["host"] . $port .
"/" . $r[1];
} else {
/* relative link, with url path */
if(ereg("/$",$p["path"])) {
/* and the path ends in '/', so not a file */
$this_url = $p["scheme"] . "://" . $p["host"] . $port .
$p["path"] .
$r[1];
} else {
/* and the path doesn't end in '/', so
probably a file (but it *could* be
a directory, we can't really know) */
$remove = strrchr($p["path"],"/");
$path = ereg_replace("$remove","/",$p["path"]);
$this_url = $p["scheme"] . "://" . $p["host"] . $port .
"$path" .
$r[1];
}
}
}
$links[] = array($array[$i],$this_url,$r[2]);
}
} else {
$links[] = array($array[$i],$r[1],$r[2]);
}
}
return $links; /*
array[$i][0] = entire link,
array[$i][1] = link,
array[$i][2] = link title
*/
} // end function get_links
/* ************************************* */
/* Translate functions by Aral Balkan */
/* ************************************* */
function translate($s, $url=''){
// Calls all translate functions and returns the result
$translated = $this->translate_links($s, $url);
$translated = $this->translate_images($translated, $url);
$translated = $this->translate_flash_objects($translated, $url);
$translated = $this->translate_embeds($translated, $url);
return $translated;
}
/* ************************************* */
function translate_links($s,$url=''){
// added 6.22.01 Aral Balkan
// Replaces relative links in the body of passed string with
// absolute links.
if($url) {
$p = parse_url($url);
if($p["port"]) {
$port = ":$p[port]";
} else {
$port = '';
}
}
$copy = $s; // so we can return links and titles in their proper case
$s = strtolower($s); // or else the strstr and strpos searches are case
sensitive...
$pos_start=strpos($s,"<a");
$previous_close = 0; // save the previous closing location (top = 0)
while($pos_start) {
$pos_close = strpos($s,"</a",$pos_start);
if($pos_close) {
$pos_close += 4;
} else {
break;
}
$array[] = substr( $copy , $pos_start , $pos_close-$pos_start );
// save the rest of the page
// (to be used when stringing it back together again)
// - aral 6/22/01
$rest_of_page[] = substr($copy, $previous_close,
$pos_start-$previous_close);
$previous_close = $pos_close;
$pos_start=strpos($s,"<a",$pos_close);
}
for($i=0;$i<count($array);$i++) {
eregi('href *= *"?([^" >]*)"?[^>]*>(.*)</a
*>?',$array[$i],$r);
if($url) {
if(!eregi("^mailto",$r[1])) {
if(eregi("^(f|ht)tp",$r[1])) {
/* full url */
$this_url = $r[1];
} elseif(eregi("^/",$r[1])) {
/* absolute path, but not full url */
$this_url = $p["scheme"] . "://" . $p["host"] . $port . $r[1];
// replace the relative link with the absolute one
if ( ('' !== $r[1]) && (NULL !== $r[1]) ) {
$absolute_links[] = eregi_replace($r[1], $this_url, $array[$i]);
}
} else {
if($p["path"] == "/" || $p["path"] == '') {
/* relative link, but no url path */
$this_url = $p["scheme"] . "://" . $p["host"] . $port .
"/" . $r[1];
// replace the relative link with the absolute one
if ( ('' !== $r[1]) && (NULL !== $r[1]) ) {
$absolute_links[] = eregi_replace($r[1], $this_url, $array[$i]);
}
} else {
/* relative link, with url path */
if(ereg("/$",$p["path"])) {
/* and the path ends in '/', so not a file */
// added extra back slash - aral
$this_url = $p["scheme"] . "://" . $p["host"] . $port .
$p["path"] .
$r[1];
// replace the relative link with the absolute one
if ( ('' !== $r[1]) && (NULL !== $r[1]) ) {
$absolute_links[] = eregi_replace($r[1], $this_url, $array[$i]);
}
} else {
/* and the path doesn't end in '/', so
probably a file (but it *could* be
a directory, we can't really know) */
$remove = strrchr($p["path"],"/");
$path = ereg_replace("$remove","/",$p["path"]);
$this_url = $p["scheme"] . "://" . $p["host"] . $port .
"$path" .
$r[1];
// replace the relative link with the absolute one
if ( ('' !== $r[1]) && (NULL !== $r[1]) ) {
$absolute_links[] = eregi_replace($r[1], $this_url, $array[$i]);
}
}
}
}
$links[] = array($array[$i],$this_url,$r[2]);
}
} else {
$links[] = array($array[$i],$r[1],$r[2]);
}
}
// save all the stuff after the very last link:
$footer = substr($copy, $pos_close);
// string together the page with all absolute links:
$count = 0;
$new_content = ''; // this will store the new page/content
while ($absolute_links[$count]) {
$new_content .= $rest_of_page[$count].$absolute_links[$count];
$count++;
}
$new_content .= $footer;
// return the new content:
return $new_content;
} // end function translate_links
/* ************************************* */
function translate_images($s,$url=''){
// added 6.22.01 Aral Balkan
// Replaces relative links to images in the body of passed string with
// absolute links to images.
if($url) {
$p = parse_url($url);
if($p["port"]) {
$port = ":$p[port]";
} else {
$port = '';
}
}
$copy = $s; // so we can return links and titles in their proper case
$s = strtolower($s); // or else the strstr and strpos searches are case
sensitive...
$pos_start=strpos($s,"<img");
$previous_close = 0; // save the previous closing location (top = 0)
while($pos_start) {
$pos_close = strpos($s,">",$pos_start);
if($pos_close) {
$pos_close += 4;
} else {
break;
}
$array[] = substr( $copy , $pos_start , $pos_close-$pos_start );
// save the rest of the page
// (to be used when stringing it back together again)
// - aral 6/22/01
$rest_of_page[] = substr($copy, $previous_close,
$pos_start-$previous_close);
$previous_close = $pos_close;
$pos_start=strpos($s,"<img",$pos_close);
}
for($i=0;$i<count($array);$i++) {
eregi('src *= *"?([^" >]*)"?[^>]*>(.*) *>?',$array[$i],$r);
if($url) {
if(!eregi("^mailto",$r[1])) {
if(eregi("^(f|ht)tp",$r[1])) {
/* full url */
$this_url = $r[1];
} elseif(eregi("^/",$r[1])) {
/* absolute path, but not full url */
$this_url = $p["scheme"] . "://" . $p["host"] . $port . $r[1];
$absolute_links[] = eregi_replace($r[1], $this_url, $array[$i]);
} else {
if($p["path"] == "/" || $p["path"] == '') {
/* relative link, but no url path */
$this_url = $p["scheme"] . "://" . $p["host"] . $port .
"/" . $r[1];
$absolute_links[] = eregi_replace($r[1], $this_url, $array[$i]);
} else {
/* relative link, with url path */
if(ereg("/$",$p["path"])) {
/* and the path ends in '/', so not a file */
// added extra back slash - aral
$this_url = $p["scheme"] . "://" . $p["host"] . $port .
$p["path"] .
$r[1];
$absolute_links[] = eregi_replace($r[1], $this_url, $array[$i]);
} else {
/* and the path doesn't end in '/', so
probably a file (but it *could* be
a directory, we can't really know) */
$remove = strrchr($p["path"],"/");
$path = ereg_replace("$remove","/",$p["path"]);
$this_url = $p["scheme"] . "://" . $p["host"] . $port .
"$path" .
$r[1];
$absolute_links[] = eregi_replace($r[1], $this_url, $array[$i]);
}
}
}
$links[] = array($array[$i],$this_url,$r[2]);
}
} else {
$links[] = array($array[$i],$r[1],$r[2]);
}
}
// save all the stuff after the very last link:
$footer = substr($copy, $pos_close);
// string together the page with all absolute links:
$count = 0;
$new_content = ''; // this will store the new page/content
while ($absolute_links[$count]) {
$new_content .= $rest_of_page[$count].$absolute_links[$count];
$count++;
}
$new_content .= $footer;
// return the new content:
return $new_content;
} // end function translate_images
/* ************************************* */
function translate_flash_objects($s,$url=''){
// added 6.22.01 Aral Balkan
// Replaces relative links to Flash movies in Object tags of passed string
with
// absolute links to Flash movies.
if($url) {
$p = parse_url($url);
if($p["port"]) {
$port = ":$p[port]";
} else {
$port = '';
}
}
$copy = $s; // so we can return links and titles in their proper case
$s = strtolower($s); // or else the strstr and strpos searches are case
sensitive...
$pos_start=strpos($s,"<param name=movie");
$previous_close = 0; // save the previous closing location (top = 0)
while($pos_start) {
$pos_close = strpos($s,">",$pos_start);
if($pos_close) {
$pos_close += 4;
} else {
break;
}
$array[] = substr( $copy , $pos_start , $pos_close-$pos_start );
// save the rest of the page
// (to be used when stringing it back together again)
// - aral 6/22/01
$rest_of_page[] = substr($copy, $previous_close,
$pos_start-$previous_close);
$previous_close = $pos_close;
$pos_start=strpos($s,"<param name=movie",$pos_close);
}
for($i=0;$i<count($array);$i++) {
eregi('value *= *"?([^" >]*)"?[^>]*>(.*)
*>?',$array[$i],$r);
if($url) {
if(!eregi("^mailto",$r[1])) {
if(eregi("^(f|ht)tp",$r[1])) {
/* full url */
$this_url = $r[1];
} elseif(eregi("^/",$r[1])) {
/* absolute path, but not full url */
$this_url = $p["scheme"] . "://" . $p["host"] . $port . $r[1];
$absolute_links[] = eregi_replace($r[1], $this_url, $array[$i]);
} else {
if($p["path"] == "/" || $p["path"] == '') {
/* relative link, but no url path */
$this_url = $p["scheme"] . "://" . $p["host"] . $port .
"/" . $r[1];
$absolute_links[] = eregi_replace($r[1], $this_url, $array[$i]);
} else {
/* relative link, with url path */
if(ereg("/$",$p["path"])) {
/* and the path ends in '/', so not a file */
// added extra back slash - aral
$this_url = $p["scheme"] . "://" . $p["host"] . $port .
$p["path"] .
$r[1];
$absolute_links[] = eregi_replace($r[1], $this_url, $array[$i]);
} else {
/* and the path doesn't end in '/', so
probably a file (but it *could* be
a directory, we can't really know) */
$remove = strrchr($p["path"],"/");
$path = ereg_replace("$remove","/",$p["path"]);
$this_url = $p["scheme"] . "://" . $p["host"] . $port .
"$path" .
$r[1];
$absolute_links[] = eregi_replace($r[1], $this_url, $array[$i]);
}
}
}
$links[] = array($array[$i],$this_url,$r[2]);
}
} else {
$links[] = array($array[$i],$r[1],$r[2]);
}
}
// save all the stuff after the very last link:
$footer = substr($copy, $pos_close);
// string together the page with all absolute links:
$count = 0;
$new_content = ''; // this will store the new page/content
while ($absolute_links[$count]) {
$new_content .= $rest_of_page[$count].$absolute_links[$count];
$count++;
}
$new_content .= $footer;
// return the new content:
return $new_content;
} // end function translate_flash_objects
/* ************************************* */
function translate_embeds($s,$url=''){
// added 6.22.01 Aral Balkan
// Replaces relative links to <EMBED>ed plugins in the body of passed
string with absolute links.
if($url) {
$p = parse_url($url);
if($p["port"]) {
$port = ":$p[port]";
} else {
$port = '';
}
}
$copy = $s; // so we can return links and titles in their proper case
$s = strtolower($s); // or else the strstr and strpos searches are case
sensitive...
$pos_start=strpos($s,"<embed");
$previous_close = 0; // save the previous closing location (top = 0)
while($pos_start) {
$pos_close = strpos($s,">",$pos_start);
if($pos_close) {
$pos_close += 4;
} else {
break;
}
$array[] = substr( $copy , $pos_start , $pos_close-$pos_start );
// save the rest of the page
// (to be used when stringing it back together again)
// - aral 6/22/01
$rest_of_page[] = substr($copy, $previous_close,
$pos_start-$previous_close);
$previous_close = $pos_close;
$pos_start=strpos($s,"<embed",$pos_close);
}
for($i=0;$i<count($array);$i++) {
eregi('src *= *"?([^" >]*)"?[^>]*>(.*) *>?',$array[$i],$r);
if($url) {
if(!eregi("^mailto",$r[1])) {
if(eregi("^(f|ht)tp",$r[1])) {
/* full url */
$this_url = $r[1];
} elseif(eregi("^/",$r[1])) {
/* absolute path, but not full url */
$this_url = $p["scheme"] . "://" . $p["host"] . $port . $r[1];
$absolute_links[] = eregi_replace($r[1], $this_url, $array[$i]);
} else {
if($p["path"] == "/" || $p["path"] == '') {
/* relative link, but no url path */
$this_url = $p["scheme"] . "://" . $p["host"] . $port .
"/" . $r[1];
$absolute_links[] = eregi_replace($r[1], $this_url, $array[$i]);
} else {
/* relative link, with url path */
if(ereg("/$",$p["path"])) {
/* and the path ends in '/', so not a file */
// added extra back slash - aral
$this_url = $p["scheme"] . "://" . $p["host"] . $port .
$p["path"] .
$r[1];
$absolute_links[] = eregi_replace($r[1], $this_url, $array[$i]);
} else {
/* and the path doesn't end in '/', so
probably a file (but it *could* be
a directory, we can't really know) */
$remove = strrchr($p["path"],"/");
$path = ereg_replace("$remove","/",$p["path"]);
$this_url = $p["scheme"] . "://" . $p["host"] . $port .
"$path" .
$r[1];
$absolute_links[] = eregi_replace($r[1], $this_url, $array[$i]);
}
}
}
$links[] = array($array[$i],$this_url,$r[2]);
}
} else {
$links[] = array($array[$i],$r[1],$r[2]);
}
}
// save all the stuff after the very last link:
$footer = substr($copy, $pos_close);
// string together the page with all absolute links:
$count = 0;
$new_content = ''; // this will store the new page/content
while ($absolute_links[$count]) {
$new_content .= $rest_of_page[$count].$absolute_links[$count];
$count++;
}
$new_content .= $footer;
// return the new content:
return $new_content;
} // end function translate_images
/* ************************************* */
function get_page_title($s){
if(eregi("<title *>([^<]*)</title *>",$s,$r)) {
return $r[1];
} else {
return 0;
}
} // end function get_page_title
/* ************************************* */
function get_meta_tags($s){
while($s = strstr($s,"<meta")) {
$pos_close = strpos($s,">") + 1;
$array[] = substr( $s , 0 , $pos_close );
$s=substr( $s , $pos_close );
}
for($i=0;$i<count($array);$i++) {
eregi('<meta +(name|httpd-equiv|http-equiv) *= *"?([^">]*)"? +content
*=
*"?([^">]*)[^>]*>',$array[$i],$r);
$meta[strtolower($r[2])] = $r[3];
}
return $meta;
} // end function get_meta_tags
function robot_rules ($url,$robots_url,$user_agent) {
$a =
$this->get_url(array("url"=>"$robots_url","robot_rules"=>FALSE));
$h = $this->get_headers($a["headers"]);
if($h["status_code"]<200 || $h["status_code"] >299) return TRUE;
// robots.txt doesn't exist, we can index
$lines = explode("\n",$a["content"]);
for($i=0;$i<count($lines);$i++) {
$entry = split(" *: *",$lines[$i]);
$type = strtolower($entry[0]);
$value = strtolower($entry[1]);
if($type == "user-agent") $ua = $value;
if($type == "disallow") {
$hash["$ua"]["$value"] = 1;
}
}
if(is_array($hash["*"])) {
while(list($k,$v) = each ($hash["*"])) {
if(strpos($url,$k)>0) return FALSE;
}
}
if(is_array($hash["$user_agent"])) {
while(list($k,$v) = each ($hash["$user_agent"])) {
if(strpos($url,$k)>0) return FALSE;
}
}
return TRUE;
}
} // End Browser Class