<?php
-/*
- * tweeper - a Twitter to RSS web scraper
- *
- * Copyright (C) 2013 Antonio Ospite <ospite@studenti.unina.it>
- *
+/**
+ * @file
+ * Tweeper - a Twitter to RSS web scraper.
+ *
+ * Copyright (C) 2013-2018 Antonio Ospite <ao2@ao2.it>
+ *
* 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 <http://www.gnu.org/licenses/>.
*/
-date_default_timezone_set('UTC');
-
-define('USER_AGENT', 'Mozilla/5.0 (Windows NT 6.1; rv:22.0) Gecko/20130405 Firefox/22.0');
-
-function get_url_info($url)
-{
- $ch = curl_init($url);
- curl_setopt_array($ch, array(
- CURLOPT_HEADER => TRUE,
- CURLOPT_NOBODY => TRUE,
- CURLOPT_FOLLOWLOCATION => TRUE, // follow http redirects to get the real URL
- CURLOPT_RETURNTRANSFER => TRUE,
- CURLOPT_SSL_VERIFYHOST => FALSE,
- CURLOPT_SSL_VERIFYPEER => FALSE,
- CURLOPT_USERAGENT => USER_AGENT,
- ));
- curl_exec($ch);
- $url_info = curl_getinfo($ch);;
- curl_close($ch);
-
- return $url_info;
-}
-
-function generate_enclosure($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",
- );
-
- $url_info = get_url_info($url);
+require_once 'autoload.php';
- $supported = in_array($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']);
+use Tweeper\Tweeper;
- $dom->appendChild($enc);
+date_default_timezone_set('UTC');
- return $dom->saveXML($enc);
+/**
+ * Check if the script is being run from the command line.
+ */
+function is_cli() {
+ return (php_sapi_name() === "cli");
}
-
-class Tweeper {
-
- 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($timestamp);
- }
-
- private static function get_contents($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: {" + USER_AGENT + "}\r\n"
- ))
- )
- );
-
- $context = stream_context_create($opts);
- $contents = file_get_contents($uri, false, $context);
- return $contents;
- }
-
- public function tweep($uri) {
- $html = Tweeper::get_contents($uri);
-
- $xmlDoc = new DOMDocument();
- $xmlDoc->loadHTML($html);
-
- $output = $this->xsltProcessor->transformToXML($xmlDoc);
-
- if (FALSE === $output) {
- trigger_error('XSL transformation failed.', E_USER_ERROR);
- return NULL;
- }
- return $output;
+/**
+ * Show the script usage.
+ */
+function usage($argv) {
+ if (is_cli()) {
+ $usage = "{$argv[0]} [-e|-h|--help] <src_url>\n";
}
-}
-
-function usage($argv)
-{
- if (php_sapi_name() != 'cli')
+ else {
$usage = htmlentities("{$_SERVER['SCRIPT_NAME']}?src_url=<src_url>&generate_enclosure=<0|1>");
- else
- $usage = "{$argv[0]} [-e|-h|--help] <src_url>\n";
+ }
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);
}
}
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 = __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;
projects / tweeper.git / blobdiff