2019-11-01 00:02:38 +03:00
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<?php
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2022-07-01 16:10:30 +03:00
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2019-11-01 00:02:38 +03:00
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/**
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* This file is part of RSS-Bridge, a PHP project capable of generating RSS and
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* Atom feeds for websites that don't have one.
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*
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* For the full license information, please view the UNLICENSE file distributed
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* with this source code.
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*
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* @package Core
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* @license http://unlicense.org/ UNLICENSE
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* @link https://github.com/rss-bridge/rss-bridge
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*/
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/**
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* Checks if the website for a given bridge is reachable.
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*
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* **Remarks**
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* - This action is only available in debug mode.
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* - Returns the bridge status as Json-formatted string.
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* - Returns an error if the bridge is not whitelisted.
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* - Returns a responsive web page that automatically checks all whitelisted
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* bridges (using JavaScript) if no bridge is specified.
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*/
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2022-06-22 19:30:37 +03:00
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class ConnectivityAction implements ActionInterface
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{
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public $userData = [];
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2022-07-01 16:10:30 +03:00
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2022-07-08 13:54:23 +03:00
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private BridgeFactory $bridgeFactory;
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public function __construct()
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{
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$this->bridgeFactory = new \BridgeFactory();
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}
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2019-11-01 00:02:38 +03:00
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public function execute()
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{
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if (!Debug::isEnabled()) {
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2022-05-01 22:35:52 +03:00
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returnError('This action is only available in debug mode!', 400);
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2019-11-01 00:02:38 +03:00
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}
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2022-07-01 16:10:30 +03:00
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2019-11-01 00:02:38 +03:00
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if (!isset($this->userData['bridge'])) {
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$this->returnEntryPage();
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return;
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}
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2022-07-01 16:10:30 +03:00
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2019-11-01 00:02:38 +03:00
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$bridgeName = $this->userData['bridge'];
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2022-07-01 16:10:30 +03:00
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2022-07-08 13:54:23 +03:00
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$bridgeClassName = $this->bridgeFactory->sanitizeBridgeName($bridgeName);
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if ($bridgeClassName === null) {
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throw new \InvalidArgumentException('Bridge name invalid!');
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}
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$this->reportBridgeConnectivity($bridgeClassName);
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2019-11-01 00:02:38 +03:00
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}
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2022-07-01 16:10:30 +03:00
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2019-11-01 00:02:38 +03:00
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/**
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* Generates a report about the bridge connectivity status and sends it back
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* to the user.
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*
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* The report is generated as Json-formatted string in the format
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* {
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* "bridge": "<bridge-name>",
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* "successful": true/false
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* }
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*
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2022-07-08 13:54:23 +03:00
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* @param class-string<BridgeInterface> $bridgeClassName Name of the bridge to generate the report for
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2019-11-01 00:02:38 +03:00
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* @return void
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*/
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2022-07-08 13:54:23 +03:00
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private function reportBridgeConnectivity($bridgeClassName)
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2019-11-01 00:02:38 +03:00
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{
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2022-07-08 13:54:23 +03:00
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if (!$this->bridgeFactory->isWhitelisted($bridgeClassName)) {
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2019-11-01 00:02:38 +03:00
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header('Content-Type: text/html');
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returnServerError('Bridge is not whitelisted!');
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}
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2022-07-01 16:10:30 +03:00
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2019-11-01 00:02:38 +03:00
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header('Content-Type: text/json');
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2022-07-01 16:10:30 +03:00
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2019-11-01 00:02:38 +03:00
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$retVal = [
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2022-07-08 13:54:23 +03:00
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'bridge' => $bridgeClassName,
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2019-11-01 00:02:38 +03:00
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'successful' => false,
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'http_code' => 200,
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];
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2022-07-01 16:10:30 +03:00
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2022-07-08 13:54:23 +03:00
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$bridge = $this->bridgeFactory->create($bridgeClassName);
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2022-07-01 16:10:30 +03:00
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2019-11-01 00:02:38 +03:00
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if ($bridge === false) {
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echo json_encode($retVal);
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return;
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}
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2022-07-01 16:10:30 +03:00
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2019-11-01 00:02:38 +03:00
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$curl_opts = [
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CURLOPT_CONNECTTIMEOUT => 5
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];
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2022-07-01 16:10:30 +03:00
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2019-11-01 00:02:38 +03:00
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try {
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$reply = getContents($bridge::URI, [], $curl_opts, true);
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2022-07-01 16:10:30 +03:00
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2022-05-18 00:46:37 +03:00
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if ($reply['code'] === 200) {
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2019-11-01 00:02:38 +03:00
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$retVal['successful'] = true;
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2022-05-18 00:46:37 +03:00
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if (strpos(implode('', $reply['status_lines']), '301 Moved Permanently')) {
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$retVal['http_code'] = 301;
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2019-11-01 00:02:38 +03:00
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}
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}
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} catch (Exception $e) {
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$retVal['successful'] = false;
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}
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2022-07-01 16:10:30 +03:00
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2019-11-01 00:02:38 +03:00
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echo json_encode($retVal);
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}
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2022-07-01 16:10:30 +03:00
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2019-11-01 00:02:38 +03:00
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private function returnEntryPage()
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{
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echo <<<EOD
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<!DOCTYPE html>
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<html>
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<head>
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<link rel="stylesheet" href="static/bootstrap.min.css">
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<link
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rel="stylesheet"
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href="https://use.fontawesome.com/releases/v5.6.3/css/all.css"
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integrity="sha384-UHRtZLI+pbxtHCWp1t77Bi1L4ZtiqrqD80Kn4Z8NTSRyMA2Fd33n5dQ8lWUE00s/"
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crossorigin="anonymous">
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<link rel="stylesheet" href="static/connectivity.css">
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<script src="static/connectivity.js" type="text/javascript"></script>
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</head>
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<body>
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<div id="main-content" class="container">
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<div class="progress">
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<div class="progress-bar" role="progressbar" aria-valuenow="75" aria-valuemin="0" aria-valuemax="100"></div>
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</div>
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<div id="status-message" class="sticky-top alert alert-primary alert-dismissible fade show" role="alert">
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<i id="status-icon" class="fas fa-sync"></i>
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<span>...</span>
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<button type="button" class="close" data-dismiss="alert" aria-label="Close" onclick="stopConnectivityChecks()">
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<span aria-hidden="true">×</span>
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</button>
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</div>
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<input type="text" class="form-control" id="search" onkeyup="search()" placeholder="Search for bridge..">
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</div>
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</body>
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</html>
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EOD;
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}
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}
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