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File: resources/Smarty/plugins/function.fetch.php

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File: resources/Smarty/plugins/function.fetch.php
Role: Example script
Content type: text/plain
Description: Example script
Class: Basic Controller Framework
Framework to route requests configured controllers
Author: By
Last change:
Date: 7 months ago
Size: 8,115 bytes
 

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<?php
/**
 * Smarty plugin
 *
 * @package Smarty
 * @subpackage PluginsFunction
 */

/**
 * Smarty {fetch} plugin
 * Type: function<br>
 * Name: fetch<br>
 * Purpose: fetch file, web or ftp data and display results
 *
 * @link http://www.smarty.net/manual/en/language.function.fetch.php {fetch}
 * (Smarty online manual)
 * @author Monte Ohrt <monte at ohrt dot com>
 *
 * @param array $params parameters
 * @param Smarty_Internal_Template $template template object
 *
 * @throws SmartyException
 * @return string|null if the assign parameter is passed, Smarty assigns the result to a template variable
 */
function smarty_function_fetch($params, $template)
{
    if (empty(
$params[ 'file' ])) {
       
trigger_error("[plugin] fetch parameter 'file' cannot be empty", E_USER_NOTICE);

        return;
    }

   
// strip file protocol
   
if (stripos($params[ 'file' ], 'file://') === 0) {
       
$params[ 'file' ] = substr($params[ 'file' ], 7);
    }

   
$protocol = strpos($params[ 'file' ], '://');
    if (
$protocol !== false) {
       
$protocol = strtolower(substr($params[ 'file' ], 0, $protocol));
    }

    if (isset(
$template->smarty->security_policy)) {
        if (
$protocol) {
           
// remote resource (or php stream, ?)
           
if (!$template->smarty->security_policy->isTrustedUri($params[ 'file' ])) {
                return;
            }
        } else {
           
// local file
           
if (!$template->smarty->security_policy->isTrustedResourceDir($params[ 'file' ])) {
                return;
            }
        }
    }

   
$content = '';
    if (
$protocol == 'http') {
       
// http fetch
       
if ($uri_parts = parse_url($params[ 'file' ])) {
           
// set defaults
           
$host = $server_name = $uri_parts[ 'host' ];
           
$timeout = 30;
           
$accept = "image/gif, image/x-xbitmap, image/jpeg, image/pjpeg, */*";
           
$agent = "Smarty Template Engine " . Smarty::SMARTY_VERSION;
           
$referer = "";
           
$uri = !empty($uri_parts[ 'path' ]) ? $uri_parts[ 'path' ] : '/';
           
$uri .= !empty($uri_parts[ 'query' ]) ? '?' . $uri_parts[ 'query' ] : '';
           
$_is_proxy = false;
            if (empty(
$uri_parts[ 'port' ])) {
               
$port = 80;
            } else {
               
$port = $uri_parts[ 'port' ];
            }
            if (!empty(
$uri_parts[ 'user' ])) {
               
$user = $uri_parts[ 'user' ];
            }
            if (!empty(
$uri_parts[ 'pass' ])) {
               
$pass = $uri_parts[ 'pass' ];
            }
           
// loop through parameters, setup headers
           
foreach ($params as $param_key => $param_value) {
                switch (
$param_key) {
                    case
"file":
                    case
"assign":
                    case
"assign_headers":
                        break;
                    case
"user":
                        if (!empty(
$param_value)) {
                           
$user = $param_value;
                        }
                        break;
                    case
"pass":
                        if (!empty(
$param_value)) {
                           
$pass = $param_value;
                        }
                        break;
                    case
"accept":
                        if (!empty(
$param_value)) {
                           
$accept = $param_value;
                        }
                        break;
                    case
"header":
                        if (!empty(
$param_value)) {
                            if (!
preg_match('![\w\d-]+: .+!', $param_value)) {
                               
trigger_error("[plugin] invalid header format '" . $param_value . "'", E_USER_NOTICE);

                                return;
                            } else {
                               
$extra_headers[] = $param_value;
                            }
                        }
                        break;
                    case
"proxy_host":
                        if (!empty(
$param_value)) {
                           
$proxy_host = $param_value;
                        }
                        break;
                    case
"proxy_port":
                        if (!
preg_match('!\D!', $param_value)) {
                           
$proxy_port = (int) $param_value;
                        } else {
                           
trigger_error("[plugin] invalid value for attribute '" . $param_key . "'", E_USER_NOTICE);

                            return;
                        }
                        break;
                    case
"agent":
                        if (!empty(
$param_value)) {
                           
$agent = $param_value;
                        }
                        break;
                    case
"referer":
                        if (!empty(
$param_value)) {
                           
$referer = $param_value;
                        }
                        break;
                    case
"timeout":
                        if (!
preg_match('!\D!', $param_value)) {
                           
$timeout = (int) $param_value;
                        } else {
                           
trigger_error("[plugin] invalid value for attribute '" . $param_key . "'", E_USER_NOTICE);

                            return;
                        }
                        break;
                    default:
                       
trigger_error("[plugin] unrecognized attribute '" . $param_key . "'", E_USER_NOTICE);

                        return;
                }
            }
            if (!empty(
$proxy_host) && !empty($proxy_port)) {
               
$_is_proxy = true;
               
$fp = fsockopen($proxy_host, $proxy_port, $errno, $errstr, $timeout);
            } else {
               
$fp = fsockopen($server_name, $port, $errno, $errstr, $timeout);
            }

            if (!
$fp) {
               
trigger_error("[plugin] unable to fetch: $errstr ($errno)", E_USER_NOTICE);

                return;
            } else {
                if (
$_is_proxy) {
                   
fputs($fp, 'GET ' . $params[ 'file' ] . " HTTP/1.0\r\n");
                } else {
                   
fputs($fp, "GET $uri HTTP/1.0\r\n");
                }
                if (!empty(
$host)) {
                   
fputs($fp, "Host: $host\r\n");
                }
                if (!empty(
$accept)) {
                   
fputs($fp, "Accept: $accept\r\n");
                }
                if (!empty(
$agent)) {
                   
fputs($fp, "User-Agent: $agent\r\n");
                }
                if (!empty(
$referer)) {
                   
fputs($fp, "Referer: $referer\r\n");
                }
                if (isset(
$extra_headers) && is_array($extra_headers)) {
                    foreach (
$extra_headers as $curr_header) {
                       
fputs($fp, $curr_header . "\r\n");
                    }
                }
                if (!empty(
$user) && !empty($pass)) {
                   
fputs($fp, "Authorization: BASIC " . base64_encode("$user:$pass") . "\r\n");
                }

               
fputs($fp, "\r\n");
                while (!
feof($fp)) {
                   
$content .= fgets($fp, 4096);
                }
               
fclose($fp);
               
$csplit = preg_split("!\r\n\r\n!", $content, 2);

               
$content = $csplit[ 1 ];

                if (!empty(
$params[ 'assign_headers' ])) {
                   
$template->assign($params[ 'assign_headers' ], preg_split("!\r\n!", $csplit[ 0 ]));
                }
            }
        } else {
           
trigger_error("[plugin fetch] unable to parse URL, check syntax", E_USER_NOTICE);

            return;
        }
    } else {
       
$content = @file_get_contents($params[ 'file' ]);
        if (
$content === false) {
            throw new
SmartyException("{fetch} cannot read resource '" . $params[ 'file' ] . "'");
        }
    }

    if (!empty(
$params[ 'assign' ])) {
       
$template->assign($params[ 'assign' ], $content);
    } else {
        return
$content;
    }
}