X-Git-Url: https://git.ao2.it/tweeper.git/blobdiff_plain/1e04fc440d06b3871575bae5902167282fd1476e..ad39a334af38e4a5d37e553e8ad81eac4d2cedaa:/tweeper.php?ds=inline diff --git a/tweeper.php b/tweeper.php index cd2c3ba..bcc85fe 100644 --- a/tweeper.php +++ b/tweeper.php @@ -1,146 +1,173 @@ - * + +/** + * @file + * Tweeper - a Twitter to RSS web scraper. + * + * Copyright (C) 2013-2020 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'); +require_once 'autoload.php'; -function str_to_gmdate($date) -{ - $timestamp = strtotime($date); - return epoch_to_gmdate($timestamp); -} +use Tweeper\Tweeper; -function epoch_to_gmdate($timestamp) -{ - return gmdate('D, d M Y H:i:s', $timestamp) . ' GMT'; -} +date_default_timezone_set('UTC'); -function get_url_info($url) -{ - $ch = curl_init($url); - curl_setopt_array($ch, array( - CURLOPT_HEADER => TRUE, // get the header - CURLOPT_NOBODY => TRUE, // don't donwload body - CURLOPT_FOLLOWLOCATION => TRUE, // the magic sauce - CURLOPT_RETURNTRANSFER => TRUE, - CURLOPT_SSL_VERIFYHOST => FALSE, // suppress certain SSL errors - CURLOPT_SSL_VERIFYPEER => FALSE, - )); - curl_exec($ch); - $url_info = curl_getinfo($ch);; - curl_close($ch); - - return $url_info; +/** + * Check if the script is being run from the command line. + */ +function is_cli() { + return (php_sapi_name() === "cli"); } -function generate_enclosure($url) { - $url_info = get_url_info($url); - - $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); +/** + * Show the script usage. + */ +function usage($argv) { + if (is_cli()) { + $usage = "{$argv[0]} [-e|-m <0|1>|-u <0|1>|-v <0|1>|-h|--help] \n"; + } + else { + $usage = htmlentities("{$_SERVER['SCRIPT_NAME']}?src_url=&generate_enclosure=<0|1>&show_usernames=<0|1>&show_multimedia=<0|1>&verbose_output=<0|1>"); + } - return $dom->saveXML($enc); + return "usage: $usage"; } +/** + * Parse command line options. + */ +function parse_options_cli($argv, $argc) { + $options = [ + 'generate_enclosure' => FALSE, + 'show_usernames' => TRUE, + 'show_multimedia' => TRUE, + 'verbose_output' => TRUE, + ]; + + if ($argc < 2) { + return $options; + } -class Tweeper { - - private $USER_AGENT = "Mozilla/5.0 (Windows NT 6.1; rv:22.0) Gecko/20130405 Firefox/22.0"; + $cli_options = getopt("em:u:v:h", ["help"]); + foreach ($cli_options as $opt => $val) { + switch ($opt) { + case 'e': + $options['generate_enclosure'] = TRUE; + break; + + case 'm': + $ret = filter_var($val, FILTER_VALIDATE_BOOLEAN, FILTER_NULL_ON_FAILURE); + if (NULL === $ret) { + fwrite(STDERR, "Invalid argument for the -m option.\n"); + fwrite(STDERR, usage($argv)); + exit(1); + } + $options['show_multimedia'] = $val; + break; + + case 'u': + $ret = filter_var($val, FILTER_VALIDATE_BOOLEAN, FILTER_NULL_ON_FAILURE); + if (NULL === $ret) { + fwrite(STDERR, "Invalid argument for the -u option.\n"); + fwrite(STDERR, usage($argv)); + exit(1); + } + $options['show_usernames'] = $val; + break; + + case 'v': + $ret = filter_var($val, FILTER_VALIDATE_BOOLEAN, FILTER_NULL_ON_FAILURE); + if (NULL === $ret) { + fwrite(STDERR, "Invalid argument for the -v option.\n"); + fwrite(STDERR, usage($argv)); + exit(1); + } + $options['verbose_output'] = $val; + break; + + case 'h': + case 'help': + echo usage($argv); + exit(0); + + default: + fwrite(STDERR, usage($argv)); + exit(1); + } + } - public function __construct($stylesheet) { - $stylesheet_contents = $this->get_contents($stylesheet); + // For now assume that the URL is the lest argument, in the future we could + // switch to PHP >= 7.1 and use the $optind argument of getopt(). + $options['src_url'] = array_pop($argv); - $xslDoc = new DOMDocument(); - $xslDoc->loadXML($stylesheet_contents); + return $options; +} - $this->xsltProcessor = new XSLTProcessor(); - $this->xsltProcessor->registerPHPFunctions(); - $this->xsltProcessor->importStylesheet($xslDoc); +/** + * Parse options passed from a query string. + */ +function parse_options_query_string() { + $options = [ + 'generate_enclosure' => FALSE, + 'show_usernames' => TRUE, + 'show_multimedia' => TRUE, + 'verbose_output' => TRUE, + ]; + + if (isset($_GET['src_url'])) { + $options['src_url'] = $_GET['src_url']; } - private function get_contents($uri) { - # https://www.wjsams.com/c/docs/Wiki/Php-HowToSetUserAgentOnFileGetContents - $opts = array( - 'http' => array( - 'method' => "GET", - 'header' => join(array( - "Accept-language: en\r\n", - "User-Agent: {$this->USER_AGENT}\r\n" - )) - ) - ); - - $context = stream_context_create($opts); - $contents = file_get_contents($uri, false, $context); - return $contents; + if (isset($_GET['generate_enclosure'])) { + $options['generate_enclosure'] = $_GET['generate_enclosure'] == 1; } - public function tweep($uri) { - $html = $this->get_contents($uri); - - $xmlDoc = new DOMDocument(); - $xmlDoc->loadHTML($html); - - $output = $this->xsltProcessor->transformToXML($xmlDoc); + if (isset($_GET['show_multimedia'])) { + $options['show_multimedia'] = $_GET['show_multimedia'] != 0; + } - if (FALSE === $output) { - trigger_error('XSL transformation failed.', E_USER_ERROR); - return NULL; - } - return $output; + if (isset($_GET['show_usernames'])) { + $options['show_usernames'] = $_GET['show_usernames'] != 0; } -} -function usage($argv) -{ - if (php_sapi_name() != 'cli') - $usage = htmlentities("{$_SERVER['SCRIPT_NAME']}?src_url="); - else - $usage = "{$argv[0]} \n"; + if (isset($_GET['verbose_output'])) { + $options['verbose_output'] = $_GET['verbose_output'] != 0; + } - return "usage: $usage"; + return $options; } -if (isset($_GET['src_url'])) { - $src_url = $_GET['src_url']; -} else if (isset($argv[1])) { - if ($argv[1] == "-h" || $argv[1] == "--help") { - echo usage($argv); - return 0; - } - $src_url = $argv[1]; -} else { - die(usage($argv)); +if (is_cli()) { + $options = parse_options_cli($argv, $argc); + $error_stream = fopen('php://stderr', 'w'); +} +else { + $options = parse_options_query_string(); + $error_stream = fopen('php://output', 'w'); } -$url = parse_url($src_url); -if (FALSE === $url || empty($url["host"])) - die("Invalid url: $src_url\n"); - -$stylesheet = __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); -echo $tweeper->tweep($src_url); +$tweeper = new Tweeper($options['generate_enclosure'], $options['show_usernames'], $options['show_multimedia'], $options['verbose_output']); +$output = $tweeper->tweep($options['src_url']); +if (is_null($output)) { + exit(1); +} +echo $output;