X-Git-Url: https://git.ao2.it/tweeper.git/blobdiff_plain/07a6e0c19e175603bde51f800b0b484a327c515c..637c14afc01074bc957c771db666643ef2249c56:/tweeper.php diff --git a/tweeper.php b/tweeper.php index e1483f1..ff98ab7 100644 --- a/tweeper.php +++ b/tweeper.php @@ -1,211 +1,78 @@ - * +/** + * @file + * Tweeper - a Twitter to RSS web scraper. + * + * Copyright (C) 2013-2016 Antonio Ospite + * * This program is free software: you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation, either version 3 of the License, or * (at your option) any later version. - * + * * This program 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 General Public License for more details. - * + * * You should have received a copy of the GNU General Public License * along with this program. If not, see . */ -date_default_timezone_set('UTC'); - -class Tweeper { - - private static $USER_AGENT = "Mozilla/5.0 (Windows NT 6.1; rv:22.0) Gecko/20130405 Firefox/22.0"; - - public function __construct($stylesheet, $generate_enclosure = FALSE) { - $stylesheet_contents = $this->get_contents($stylesheet); - - $xslDoc = new DOMDocument(); - $xslDoc->loadXML($stylesheet_contents); - - $this->xsltProcessor = new XSLTProcessor(); - $this->xsltProcessor->registerPHPFunctions(); - $this->xsltProcessor->setParameter('', 'generateEnclosure', $generate_enclosure); - $this->xsltProcessor->importStylesheet($xslDoc); - } - - public static function epoch_to_gmdate($timestamp) - { - return gmdate('D, d M Y H:i:s', $timestamp) . ' GMT'; - } - - public static function str_to_gmdate($date) - { - $timestamp = strtotime($date); - return Tweeper::epoch_to_gmdate($timestamp); - } - - private static function get_contents($url) - { - $ch = curl_init($url); - curl_setopt_array($ch, array( - CURLOPT_HEADER => FALSE, - CURLOPT_FOLLOWLOCATION => TRUE, // follow http redirects to get the real URL - CURLOPT_RETURNTRANSFER => TRUE, - CURLOPT_SSL_VERIFYHOST => FALSE, - CURLOPT_SSL_VERIFYPEER => FALSE, - CURLOPT_HTTPHEADER => array('Accept-language: en'), - CURLOPT_USERAGENT => Tweeper::$USER_AGENT, - )); - $contents = curl_exec($ch); - curl_close($ch); - - return $contents; - } - - private static function get_info($url) - { - $ch = curl_init($url); - curl_setopt_array($ch, array( - CURLOPT_HEADER => TRUE, - CURLOPT_NOBODY => TRUE, - CURLOPT_FOLLOWLOCATION => TRUE, // follow http redirects to get the real URL - CURLOPT_RETURNTRANSFER => TRUE, - CURLOPT_SSL_VERIFYHOST => FALSE, - CURLOPT_SSL_VERIFYPEER => FALSE, - CURLOPT_USERAGENT => Tweeper::$USER_AGENT, - )); - curl_exec($ch); - $url_info = curl_getinfo($ch); - curl_close($ch); - - return $url_info; - } - - public static function generate_enclosure($url) - { - $supported_content_types = array( - "application/ogg", - "audio/aac", - "audio/mp4", - "audio/mpeg", - "audio/vorbis", - "audio/wav", - "audio/webm", - "audio/x-midi", - "image/gif", - "image/jpeg", - "video/avi", - "video/mp4", - "video/mpeg", - "video/ogg", - ); - - $url_info = Tweeper::get_info($url); - - $supported = in_array($url_info['content_type'], $supported_content_types); - if (!$supported) { - error_log("Unsupported enclosure content type \"" . $url_info['content_type'] . "\" for URL: " . $url_info['url']); - return ''; - } - - $dom = new DomDocument(); - $enc = $dom->createElement('enclosure'); - $enc->setAttribute('url', $url_info['url']); - $enc->setAttribute('length', $url_info['download_content_length']); - $enc->setAttribute('type', $url_info['content_type']); - - $dom->appendChild($enc); - - return $dom->saveXML($enc); - } +require_once 'autoload.php'; - /* Mimic the message from libxml.c::php_libxml_ctx_error_level() */ - private function log_xml_error($error) { - $output = ""; - - switch ($error->level) { - case LIBXML_ERR_WARNING: - $output .= "Warning $error->code: "; - break; - case LIBXML_ERR_ERROR: - $output .= "Error $error->code: "; - break; - case LIBXML_ERR_FATAL: - $output .= "Fatal Error $error->code: "; - break; - } - - $output .= trim($error->message); - - if ($error->file) { - $output .= " in $error->file"; - } else { - $output .= " in Entity,"; - } - - $output .=" line $error->line"; - - error_log($output); - } +use Tweeper\Tweeper; - public function tweep($uri) { - $html = Tweeper::get_contents($uri); - - $xmlDoc = new DOMDocument(); - - // Handle warnings and errors when loading invalid HTML. - $xml_errors_value = libxml_use_internal_errors(true); - $xmlDoc->loadHTML($html); - foreach (libxml_get_errors() as $xml_error) { - $this->log_xml_error($xml_error); - } - libxml_clear_errors(); - libxml_use_internal_errors($xml_errors_value); - - $output = $this->xsltProcessor->transformToXML($xmlDoc); +date_default_timezone_set('UTC'); - if (FALSE === $output) { - trigger_error('XSL transformation failed.', E_USER_ERROR); - return NULL; - } - return $output; - } +/** + * Check if the script is being run from the command line. + */ +function is_cli() { + return (php_sapi_name() === "cli"); } -function usage($argv) -{ - if (php_sapi_name() != 'cli') - $usage = htmlentities("{$_SERVER['SCRIPT_NAME']}?src_url=&generate_enclosure=<0|1>"); - else +/** + * Show the script usage. + */ +function usage($argv) { + if (is_cli()) { $usage = "{$argv[0]} [-e|-h|--help] \n"; + } + else { + $usage = htmlentities("{$_SERVER['SCRIPT_NAME']}?src_url=&generate_enclosure=<0|1>"); + } return "usage: $usage"; } -function parse_options_cli($argv, $argc) -{ +/** + * Parse command line options. + */ +function parse_options_cli($argv, $argc) { $options = array( - 'generate_enclosure' => FALSE + 'generate_enclosure' => FALSE, ); - if ($argc < 2) + if ($argc < 2) { return $options; + } $cli_options = getopt("eh", array("help")); foreach ($cli_options as $opt => $val) { switch ($opt) { - case 'e': - $options['generate_enclosure'] = TRUE; - break; - case 'h': - case 'help': - echo usage($argv); - exit(0); - default: - die(usage($argv)); + case 'e': + $options['generate_enclosure'] = TRUE; + break; + + case 'h': + case 'help': + echo usage($argv); + exit(0); + + default: + fwrite(STDERR, usage($argv)); + exit(1); } } @@ -214,37 +81,42 @@ function parse_options_cli($argv, $argc) return $options; } -function parse_options_query_string() -{ +/** + * Parse options passed from a query string. + */ +function parse_options_query_string() { $options = array( - 'generate_enclosure' => FALSE + 'generate_enclosure' => FALSE, ); - if (isset($_GET['src_url'])) + if (isset($_GET['src_url'])) { $options['src_url'] = $_GET['src_url']; + } - if (isset($_GET['generate_enclosure'])) + if (isset($_GET['generate_enclosure'])) { $options['generate_enclosure'] = $_GET['generate_enclosure'] == 1; + } return $options; } - -if (php_sapi_name() != 'cli') - $options = parse_options_query_string(); -else +if (is_cli()) { $options = parse_options_cli($argv, $argc); + $error_stream = fopen('php://stderr', 'w'); +} +else { + $options = parse_options_query_string(); + $error_stream = fopen('php://output', 'w'); +} -if (!isset($options['src_url'])) - die(usage($argv)); - -$url = parse_url($options['src_url']); -if (FALSE === $url || empty($url["host"])) - die("Invalid url: ${options['src_url']}\n"); - -$stylesheet = "file://" . __DIR__ . "/rss_converter_" . $url["host"] . ".xsl"; -if (FALSE === file_exists($stylesheet)) - die("Conversion to RSS not supported: {$url["host"]}\n"); +if (!isset($options['src_url'])) { + fwrite($error_stream, usage(is_cli() ? $argv : NULL)); + exit(1); +} -$tweeper = new Tweeper($stylesheet, $options['generate_enclosure']); -echo $tweeper->tweep($options['src_url']); +$tweeper = new Tweeper($options['generate_enclosure']); +$output = $tweeper->tweep($options['src_url']); +if (is_null($output)) { + exit(1); +} +echo $output;