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Diffstat (limited to 'addon/twitter')
| -rw-r--r-- | addon/twitter/slinky.php | 704 |
1 files changed, 704 insertions, 0 deletions
diff --git a/addon/twitter/slinky.php b/addon/twitter/slinky.php new file mode 100644 index 000000000..51432c3f5 --- /dev/null +++ b/addon/twitter/slinky.php @@ -0,0 +1,704 @@ +<?php +/* +Copyright (c) 2009, Beau Lebens +All rights reserved. + +Redistribution and use in source and binary forms, with or without modification, +are permitted provided that the following conditions are met: + + - Redistributions of source code must retain the above copyright notice, this + list of conditions and the following disclaimer. + - Redistributions in binary form must reproduce the above copyright notice, + this list of conditions and the following disclaimer in the documentation + and/or other materials provided with the distribution. + - Neither the name of Dented Reality nor the names of the authors may be used + to endorse or promote products derived from this software without specific + prior written permission. + +THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND +ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED +WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE +DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR +ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES +(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; +LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON +ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT +(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS +SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + +*/ + +// Return options for Slinky_Service->url_get() and ->url_post() +define( 'SLINKY_BODY', 1 ); // Default +define( 'SLINKY_HEADERS', 2 ); // Not implemented yet +define( 'SLINKY_FINAL_URL', 3 ); // Default for lengthening URLs + +// So that services may decide what to do with us +define( 'SLINKY_USER_AGENT', 'Slinky v1.0 +http://dentedreality.com.au/projects/slinky/' ); + +// How many seconds until remote requests should be cut? +define( 'SLINKY_TIMEOUT', 10 ); + +/** + * Slinky allows you to go back and forth between "long" and shortened URLs + * using popular URL shortening services. + * + * Slinky assumes you have cURL installed and working, and requires the JSON + * extension installed if you're working with a service that uses JSON. + * + * Slinky will ONLY work with PHP5+ + * + * It supports some of the more popular services, with easy extensibility for + * adding your own relatively easily. It defaults to using TinyURL + * for shortening URLs. If you want to use some of the other services, you need + * to set some configuration options before actually shortening/lengthening + * URLs. I'd strongly suggest that you cache results using memcached, a local + * DB or whatever to avoid having to hit APIs etc every time you encounter a + * URL. + * + * Slinky supports shortening, and auto-detection (for lengthening URLs) + * using these services: + * - Bit.ly + * - Tr.im + * - TinyURL + * - Is.Gd + * - Fon.gs + * - Micurl.com + * - ur1.ca + * - Ptiturl + * - Tighturl + * - 2tu.us + * - Snipr / Snipurl / Snurl.com / Sn.im + * + * + * To use Slinky: + * + * $slinky = new Slinky( 'http://dentedreality.com.au/' ); + * - Creates a new Slinky instance, will default to using TinyURL for ->short(); + * + * $slinky = new Slinky( 'http://dentedreality.com.au', new Slinky_Bitly() ); + * - Creates new Slinky, forces use of Bit.ly for ->short(); + * + * $slinky = new Slinky( 'http://dentedreality.com.au/' ); + * echo $slinky->short(); + * - echos the short version of http://dentedreality.com.au/ (default to TinyURL) + * + * $slinky = new Slinky( 'http://tinyurl.com/jw5sh' ); + * echo $slinky->long(); + * - echos out the long version of http://tinyurl.com/jw5sh (which should be http://dentedreality.com.au/) + * + * $slinky = new Slinky( 'http://dentedreality.com.au/' ); + * echo $slinky->long(); + * - Attempts to lengthen the URL, but will not auto-detect which service it is + * so it will just output the original URL. Useful for always attempting to + * lengthen any URL you come across (fails gracefully) + * + * $slinky = new Slinky( 'http://dentedreality.com.au/' ); + * $slinky->set_cascade( array( new Slinky_Trim(), new Slinky_IsGd(), new Slinky_TinyURL() ) ); + * echo $slinky->short(); + * - Uses the powerful cascade mode to make sure that we get a short URL from + * Tr.im, Is.Gd or TinyURL (in that order). + * + * See specific service class definitions below for examples of how to use them, + * as some services allow (or require) additional properties before you can use + * them (for authentication etc). + * + * To use a different service with Slinky, just create your own class and + * extend Slinky_Service(). Make sure you implement url_is_short(), url_is_long(), + * make_short() and make_long(). If you need to GET or POST a URL, you can use + * ->url_get() and ->url_post(), which your class will have inherited. +**/ +class Slinky { + var $url = false; + var $service = false; + var $cascade = false; + + function __construct( $url = false, $service = false ) { + $this->url = $url; + $this->service = $service; + } + + /** + * Specify which URL Service to use + * + * @param Slinky_Service $service Packaged or custom Service object + * @return void + */ + public function set_service( $service = false ) { + if ( is_object( $service ) ) { + $this->service = $service; + } + } + + /** + * If you pass an array of Slinky_Service objects to this method, they will + * be used in order to try to get a short URL, so if one fails, it will + * try the next and so on, until it gets a valid short URL, or it runs + * out of options. + * + * @param array $services List of Slinky_Service objects as an array + **/ + public function set_cascade( $services = false ) { + if ( !$services || !is_array( $services ) ) + return false; + + $this->cascade = $services; + } + + /** + * Guess the URL service to use from known domains of short URLs + * + * @param string $url + */ + public function set_service_from_url( $url = false ) { + if ( !$url ) + $url = $this->url; + + $host = parse_url( $url, PHP_URL_HOST ); + switch ( str_replace( 'www.', '', $host ) ) { + case 'bit.ly': + if ( class_exists( 'Slinky_Bitly' ) ) { + $this->service = new Slinky_Bitly(); + break; + } + case 'tr.im': + if ( class_exists( 'Slinky_Trim' ) ) { + $this->service = new Slinky_Trim(); + break; + } + case 'tinyurl.com': + if ( class_exists( 'Slinky_TinyURL' ) ) { + $this->service = new Slinky_TinyURL(); + break; + } + case 'is.gd': + if ( class_exists( 'Slinky_IsGd' ) ) { + $this->service = new Slinky_IsGd(); + break; + } + case 'fon.gs': + if ( class_exists( 'Slinky_Fongs' ) ) { + $this->service = new Slinky_Fongs(); + break; + } + case 'micurl.com': + if ( class_exists( 'Slinky_Micurl' ) ) { + $this->service = new Slinky_Micurl(); + break; + } + case 'ur1.ca': + if ( class_exists( 'Slinky_Ur1ca' ) ) { + $this->service = new Slinky_Ur1ca(); + break; + } + case 'ptiturl.com': + if ( class_exists( 'Slinky_PtitURL' ) ) { + $this->service = new Slinky_PtitURL(); + break; + } + case 'tighturl.com': + case '2tu.us': + if ( class_exists( 'Slinky_TightURL' ) ) { + $this->service = new Slinky_TightURL(); + break; + } + case 'snipr.com': + case 'snipurl.com': + case 'snurl.com': + case 'sn.im': + if ( class_exists( 'Slinky_Snipr' ) ) { + $this->service = new Slinky_Snipr(); + break; + } + default: + $this->service = new Slinky_Default(); + break; + } + } + + /** + * Take a long URL and make it short. Will avoid "re-shortening" a URL if it + * already seems to be short. + * + * @param string $url Optional URL to shorten, otherwise use $this->url + * @return The short version of the URL + */ + public function short( $url = false ) { + if ( $url ) + $this->url = $url; + + if ( !$this->service ) + $this->set_service( new Slinky_TinyURL() ); // Defaults to tinyurl because it doesn't require any configuration + + if ( !$this->cascade ) + $this->cascade = array( $this->service ); // Use a single service in cascade mode + + foreach ( $this->cascade as $service ) { + if ( $service->url_is_short( $this->url ) ) + return trim( $this->url ); // Identified as already short, using this service + + $response = trim( $service->make_short( $this->url ) ); + if ( $response && $this->url != $response ) + return trim( $response ); + } + + return $this->url; // If all else fails, just send back the URL we already know about + } + + /** + * Take a short URL and make it long ("resolve" it). + * + * @param string $url The short URL + * @return A long URL + */ + public function long( $url = false ) { + if ( $url ) + $this->url = $url; + + if ( !$this->service ) + $this->set_service_from_url(); + + if ( $this->service->url_is_long( $this->url ) ) + return trim( $this->url ); + + return trim( $this->service->make_long( $this->url ) ); + } +} + +/** + * Use this class to create a Service implementation for your own URL + * shortening service. Extend the class and customize methods to suit your + * service. Note that it is an "abstract" class, so there are certain methods + * which you *must* define. +**/ +abstract class Slinky_Service { + + /** + * Determine, based on the input URL, if it's already a short URL, from + * this particular service. e.g. a Bit.ly URL contains "bit.ly/" + **/ + abstract function url_is_short( $url ); + + /** + * Determine if this is a "long" URL (just means it hasn't been shortened) + * already. e.g. a no-Bit.ly URL would NOT contain "bit.ly/" + **/ + abstract function url_is_long( $url ); + + /** + * Handle taking the $url and converting it to a short URL via whatever + * means is provided at the remote service. + **/ + abstract function make_short( $url ); + + /** + * Return the long/expanded version of a URL via any API means available + * from this service. As a fallback, you might + * consider just following the URL and using SLINKY_FINAL_URL as the + * return method from a $this->url_get() call to find out. + * + * This one is optional for Services extending this class, if they don't + * then the following implementation will work on most services anyway. + **/ + public function make_long( $url ) { + return $this->url_get( $url, SLINKY_FINAL_URL ); + } + + /** + * Method for getting properties that you might need during the process + * of shortening/lengthening a URL (e.g. auth credentials) + **/ + public function get( $prop ) { + if ( empty( $this->$prop ) ) + return null; + + return $this->$prop; + } + + /** + * Method for setting properties that you might need during the process + * of shortening/lengthening a URL (e.g. auth credentials) + **/ + public function set( $prop, $val ) { + $this->$prop = $val; + } + + /** + * Internal helper for performing a GET request on a remote URL. + * + * @param string $url The URL to GET + * @param const $return The return method [ SLINKY_BODY | SLINKY_FINAL_URL | SLINKY_HEADERS ] + * @return Mixed, based on the $return var passed in. + **/ + protected function url_get( $url, $return = SLINKY_BODY ) { + $ch = curl_init( $url ); + curl_setopt( $ch, CURLOPT_USERAGENT, SLINKY_USER_AGENT ); + curl_setopt( $ch, CURLOPT_SSL_VERIFYPEER, 0 ); // Don't stress about SSL validity + curl_setopt( $ch, CURLOPT_RETURNTRANSFER, 1 ); // Return the response, don't output it + curl_setopt( $ch, CURLOPT_TIMEOUT, SLINKY_TIMEOUT ); // Limit how long we'll wait for a response + curl_setopt( $ch, CURLOPT_FOLLOWLOCATION, 1 ); // Allow following of redirections + $r = curl_exec( $ch ); + if ( curl_errno( $ch ) ) { + return false; + } + + // Return whatever we were asked for + if ( SLINKY_FINAL_URL == $return ) + return curl_getinfo( $ch, CURLINFO_EFFECTIVE_URL ); + else if ( SLINKY_BODY == $return ) + return $r; + + return false; + } + + /** + * Internal helper for performing a POST request on a remote URL. + * + * @param string $url The URL to POST to + * @param array $payload Array containing name/value pairs of the parameters to POST + * @param const $return The return method [ SLINKY_BODY | SLINKY_FINAL_URL | SLINKY_HEADERS ] + * @return Mixed, based on the $return var passed in. + **/ + protected function url_post( $url, $payload = array(), $return = SLINKY_BODY ) { + $ch = curl_init( $url ); + curl_setopt( $ch, CURLOPT_POST, true ); + curl_setopt( $ch, CURLOPT_POSTFIELDS, (array) $payload ); + curl_setopt( $ch, CURLOPT_USERAGENT, SLINKY_USER_AGENT ); + curl_setopt( $ch, CURLOPT_SSL_VERIFYPEER, 0 ); // Don't stress about SSL validity + curl_setopt( $ch, CURLOPT_RETURNTRANSFER, 1 ); // Return the response, don't output it + curl_setopt( $ch, CURLOPT_TIMEOUT, SLINKY_TIMEOUT ); // Limit how long we'll wait for a response + curl_setopt( $ch, CURLOPT_FOLLOWLOCATION, 1 ); // Allow following of redirections + $r = curl_exec( $ch ); + if ( curl_errno( $ch ) ) { + return false; + } + + // Return whatever we were asked for + if ( SLINKY_FINAL_URL == $return ) + return curl_getinfo( $ch, CURLINFO_EFFECTIVE_URL ); + else if ( SLINKY_BODY == $return ) + return $r; + + return false; + } +} + +// This default service is used in cases when you try to do something based +// on auto-detection, but we can't detect anything. It will also resolve URLs +// to their "long" version by following all redirects. +class Slinky_Default extends Slinky_Service { + function url_is_short( $url ) { + return false; + } + + function url_is_long( $url ) { + return false; + } + + function make_short( $url ) { + return $url; + } +} + +// Implementation of TinyURL as a Slinky Service +class Slinky_TinyURL extends Slinky_Service { + function url_is_short( $url ) { + return stristr( $url, 'tinyurl.com/' ); + } + + function url_is_long( $url ) { + return !stristr( $url, 'tinyurl.com/' ); + } + + function make_short( $url ) { + return $this->url_get( 'http://tinyurl.com/api-create.php?url=' . urlencode( $url ) ); + } + + function make_long( $url ) { + $bits = parse_url( $url ); + $result = $this->url_get( 'http://tinyurl.com/preview.php?num=' . substr( $bits['path'], 1 ) ); + if ( preg_match('/<a id="redirecturl" href="([^"]+)">/is', $result, $matches ) ) + return $matches[1]; + else + return $url; + } +} + +// Implementation of Bit.ly as a Slinky Service +/* +To use Bit.ly, you MUST set your login and apiKey for the service first, e.g. + +$bitly = new Slinky_Bitly(); +$bitly->set( 'login', 'bitly_login' ); +$bitly->set( 'apiKey', 'bitly_apiKey' ); + +$slinky = new Slinky( $url, $bitly ); +echo $slinky->short(); + +You could also do this if the URL was already a bit.ly URL and you +were going to make it longer, since Bitly is supported for auto-detection: + +$slinky = new Slinky( $url ); +$slinky->set_service_from_url(); +$slinky->service->set( 'login', 'bitly_login' ); +$slinky->service->set( 'apiKey', 'bitly_apiKey' ); +echo $slinky->long(); + +*/ +class Slinky_Bitly extends Slinky_Service { + function url_is_short( $url ) { + return stristr( $url, 'bit.ly/' ); + } + + function url_is_long( $url ) { + return !stristr( $url, 'bit.ly/' ); + } + + function make_short( $url ) { + // Can't do anything unless these 2 properties are set first + if ( !$this->get( 'login' ) || !$this->get( 'apiKey' ) ) + return $url; + + $result = $this->url_post( 'http://api.bit.ly/shorten?version=2.0.1&format=json&login=' . $this->get( 'login' ) . '&apiKey=' . $this->get( 'apiKey' ) . '&longUrl=' . urlencode( $url ) ); + $result = json_decode( $result ); + if ( !$result->errorCode ) { + foreach ( $result->results as $detail ) { + return $detail->shortUrl; + } + } else { + return false; + } + } + + function make_long( $url ) { + // Can't do anything unless these 2 properties are set first + if ( !$this->get( 'login' ) || !$this->get( 'apiKey' ) ) + return $url; + + $result = $this->url_post( 'http://api.bit.ly/expand?version=2.0.1&format=json&login=' . $this->get( 'login' ) . '&apiKey=' . $this->get( 'apiKey' ) . '&shortUrl=' . urlencode( $url ) ); + $result = json_decode( $result ); + if ( !$result->errorCode ) { + foreach ( $result->results as $detail ) { + return $detail->longUrl; + } + } else { + return false; + } + } +} + +// Implementation of Tr.im as a Slinky Service +/* +When using Tr.im, you MAY optionally set your username and password to tie +URLs to your account, e.g. + +$trim = new Slinky_Trim(); +$trim->set( 'username', 'trim_username' ); +$trim->set( 'password', 'trim_password' ); + +$slinky = new Slinky( $url, $trim ); +echo $slinky->short(); + +You could also do this if the URL was already a tr.im URL and you +were going to make it longer, since Tr.im is supported for auto-detection: + +$slinky = new Slinky( $url ); +$slinky->set_service_from_url(); +echo $slinky->long(); + +*/ +class Slinky_Trim extends Slinky_Service { + function url_is_short( $url ) { + return stristr( $url, 'tr.im/' ); + } + + function url_is_long( $url ) { + return !stristr( $url, 'tr.im/' ); + } + + function make_short( $url ) { + $url = 'http://api.tr.im/api/trim_simple?url=' . urlencode( $url ); + + if ( $this->get( 'username' ) && $this->get( 'password' ) ) + $url .= '&username=' . urlencode( $this->get( 'username' ) ) . '&password=' . urlencode( $this->get( 'password' ) ); + + return $this->url_get( $url ); + } + + function make_long( $url ) { + $bits = parse_url( $url ); + $result = $this->url_get( 'http://api.tr.im/api/trim_destination.json?trimpath=' . substr( $bits['path'], 1 ) ); + $result = json_decode($result); + if ( 'OK' == $result->status->result ) + return $result->destination; + else + return $url; + } +} + +// Implementation of Is.Gd as a Slinky Service +class Slinky_IsGd extends Slinky_Service { + function url_is_short( $url ) { + return stristr( $url, 'is.gd/' ); + } + + function url_is_long( $url ) { + return !stristr( $url, 'is.gd/' ); + } + + function make_short( $url ) { + $response = $this->url_get( 'http://is.gd/api.php?longurl=' . urlencode( $url ) ); + if ( 'error' == substr( strtolower( $response ), 0, 5 ) ) + return false; + else + return $response; + } +} + +// Fon.gs +class Slinky_Fongs extends Slinky_Service { + function url_is_short( $url ) { + return stristr( $url, 'fon.gs/' ); + } + + function url_is_long( $url ) { + return !stristr( $url, 'fon.gs/' ); + } + + function make_short( $url ) { + $response = $this->url_get( 'http://fon.gs/create.php?url=' . urlencode( $url ) ); + if ( 'OK:' == substr( $response, 0, 3 ) ) + return str_replace( 'OK: ', '', $response ); + else + return $url; + } +} + +// Micu.rl +class Slinky_Micurl extends Slinky_Service { + function url_is_short( $url ) { + return stristr( $url, 'micurl.com/' ); + } + + function url_is_long( $url ) { + return !stristr( $url, 'micurl.com/' ); + } + + function make_short( $url ) { + $result = $this->url_get( 'http://micurl.com/api.php?url=' . urlencode( $url ) ); + if ( 1 != $result && 2 != $result ) + return 'http://micurl.com/' . $result; + else + return $url; + } +} + +// ur1.ca +class Slinky_Ur1ca extends Slinky_Service { + function url_is_short( $url ) { + return stristr( $url, 'ur1.ca/' ); + } + + function url_is_long( $url ) { + return !stristr( $url, 'ur1.ca/' ); + } + + function make_short( $url ) { + $result = $this->url_post( 'http://ur1.ca/', array( 'longurl' => $url ) ); + if ( preg_match( '/<p class="success">Your ur1 is: <a href="([^"]+)">/', $result, $matches ) ) + return $matches[1]; + else + return $url; + } +} + +// PtitURL.com +class Slinky_PtitURL extends Slinky_Service { + function url_is_short( $url ) { + return stristr( $url, 'ptiturl.com/' ); + } + + function url_is_long( $url ) { + return !stristr( $url, 'ptiturl.com/' ); + } + + function make_short( $url ) { + $result = $this->url_get( 'http://ptiturl.com/index.php?creer=oui&url=' . urlencode( $url ) ); + if ( preg_match( '/<pre><a href=\'?([^\'>]+)\'?>/', $result, $matches ) ) + return $matches[1]; + else + return $url; + } +} + +// Tighturl.com +class Slinky_TightURL extends Slinky_Service { + function url_is_short( $url ) { + return stristr( $url, 'tighturl.com/' ) + || stristr( $url, '2tu.us/' ); + } + + function url_is_long( $url ) { + return !stristr( $url, 'tighturl.com/' ) + && !stristr( $url, '2tu.us/' ); + } + + function make_short( $url ) { + $response = $this->url_get( 'http://tighturl.com/?save=y&url=' . urlencode( $url ) ); + if ( preg_match( '/Your tight URL is: <code><a href=\'([^\']+)\' target=\'_blank\'>/', $response, $matches ) ) { + return $matches[1]; + } else { + return $url; + } + } +} + +// Snipr for Slinky +/* +To use Snipr, you MUST set your user_id and API (key) for the service first, e.g. + +$snipr = new Slinky_Snipr(); +$snipr->set( 'user_id', 'Snipr User ID' ); +$snipr->set( 'API', 'Snipr API Key' ); + +$slinky = new Slinky( $url, $snipr ); +echo $slinky->short(); + +NOTE: Snipr requires the SimpleXML extension to be installed for lengthening URLs +*/ +class Slinky_Snipr extends Slinky_Service { + // Snipurl, Snurl, Snipr, Sn.im + function url_is_short( $url ) { + return stristr( $url, 'snipr.com/' ) || stristr( $url, 'snipurl.com/' ) || stristr( $url, 'snurl.com/' ) || stristr( $url, 'sn.im/' ); + } + + function url_is_long( $url ) { + return !stristr( $url, 'snipr.com/' ) || !stristr( $url, 'snipurl.com/' ) || !stristr( $url, 'snurl.com/' ) || !stristr( $url, 'sn.im/' ); + } + + function make_short( $url ) { + if ( !$this->get( 'user_id' ) || !$this->get( 'API' ) ) + return $url; + + $response = $this->url_post( 'http://snipr.com/site/getsnip', array( 'sniplink' => urlencode( $url ), 'snipuser' => $this->get( 'user_id'), 'snipapi' => $this->get( 'API' ), 'snipformat' => 'simple' ) ); + if ( 'ERROR' != substr( $response, 0, 5 ) ) + return $response; + else + return $url; + } +} + +// If you're testing things out, http://dentedreality.com.au/ should convert to: +// - http://tinyurl.com/jw5sh +// - http://bit.ly/hEkAD +// - http://tr.im/sk1H +// - http://is.gd/1yJ81 +// - http://fon.gs/tc1p8c +// - http://micurl.com/qen3uub +// - http://ur1.ca/7dcd +// - http://ptiturl.com/?id=bac8fb +// - http://tighturl.com/kgd +// - http://snipr.com/nbbw3 +// +// $slinky = new Slinky( 'http://dentedreality.com.au/' ); +// echo $slinky->short(); |