项目集成jQuery Live Notification及调用德铁FASTA API遇问题求助

Hey Dennis, let's break down your problem into two clear parts: troubleshooting the DB FASTA API curl call and setting up jQuery live notifications. Here's a step-by-step breakdown to help you fix things:

Your curl code has the right structure, but it’s missing critical error handling and status checks—these are key to figuring out what’s going wrong. First, let’s update your code with debugging tools:

$curl = curl_init();
curl_setopt_array($curl, array(
  CURLOPT_URL => "https://api.deutschebahn.com/fasta/v2/facilities?type=ELEVATOR&stationnumber=1401",
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_ENCODING => "",
  CURLOPT_MAXREDIRS => 10,
  CURLOPT_TIMEOUT => 30,
  CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
  CURLOPT_CUSTOMREQUEST => "GET",
  CURLOPT_HTTPHEADER => array(
    "authorization: Bearer XXX", // Replace XXX with your valid, unexpired token
    "cache-control: no-cache"
  ),
));

$response = curl_exec($curl);
$curlError = curl_error($curl);
$httpStatusCode = curl_getinfo($curl, CURLINFO_HTTP_CODE); // Grab the HTTP status code

curl_close($curl);

// Debug output to diagnose issues
if ($curlError) {
  echo "cURL Error: " . $curlError;
} else {
  echo "HTTP Status Code: " . $httpStatusCode . "<br>";
  // Parse and print the response to see raw data
  $parsedResponse = json_decode($response, true);
  print_r($parsedResponse);
}

Run this updated code and check the output. Here are the most common issues to look for:

• Invalid/Expired Bearer Token: A 401 Unauthorized status code means your token is either expired or not authorized for the FASTA API. Head to the DB developer portal to verify or regenerate your token.
• Incorrect Parameters: Double-check that stationnumber=1401 is a valid DB station ID, and confirm type=ELEVATOR matches the API’s expected value (check the official docs for case sensitivity or allowed types).
• SSL Certificate Issues: If you see a curl error about SSL certificates, your server might lack the necessary CA certs. For testing only, add CURLOPT_SSL_VERIFYPEER => false to your curl options (never use this in production). If that fixes it, install a proper CA bundle on your server.
• API Outage: A 500 Internal Server Error or timeouts could mean the FASTA API is down. Check the DB developer status page to confirm.

Once your API call is working, adding live notifications is straightforward. Here are two common approaches:

Option 1: In-Page Notifications (jQuery Notify Plugin) #

First, include jQuery and a lightweight notify plugin (download the plugin files locally to avoid external dependencies):

<script src="jquery.min.js"></script>
<script src="jquery.notify.min.js"></script>
<link rel="stylesheet" href="jquery.notify.css">

Then use AJAX to call your PHP script and trigger notifications based on the result:

$.ajax({
  url: 'your-php-api-script.php',
  method: 'GET',
  dataType: 'json',
  success: function(data) {
    // Show success notification
    $.notify('Elevator facility data loaded successfully!', 'success');
    // Render the data on your page (example: append to a div)
    $('#elevator-data').html(JSON.stringify(data));
  },
  error: function(xhr, status, error) {
    // Show error notification with details
    $.notify('Failed to load data: HTTP ' + xhr.status + ' - ' + error, 'error');
  }
});

Option 2: System-Wide Browser Notifications #

If you want notifications that pop up outside the browser (requires user permission), use the native Notification API:

// Request user permission first
if (Notification.permission !== 'granted') {
  Notification.requestPermission();
}

function showSystemNotification(title, message, type) {
  if (Notification.permission === 'granted') {
    new Notification(title, {
      body: message,
      icon: type === 'success' ? 'success-icon.png' : 'error-icon.png'
    });
  }
}

// Integrate with your AJAX call
$.ajax({
  url: 'your-php-api-script.php',
  method: 'GET',
  dataType: 'json',
  success: function(data) {
    showSystemNotification('Success', 'Elevator data retrieved successfully', 'success');
  },
  error: function(xhr) {
    showSystemNotification('Error', 'Failed to fetch data (HTTP ' + xhr.status + ')', 'error');
  }
});

Start with fixing the API call first—once that’s returning valid data, adding notifications will be a breeze.

内容的提问来源于stack exchange，提问作者Dennis