PushSubscription.getKey() - Web APIs 编辑

Experimental

This is an experimental technology
Check the Browser compatibility table carefully before using this in production.

The getKey() method of the PushSubscription interface returns an ArrayBuffer representing a client public key, which can then be sent to a server and used in encrypting push message data.

Syntax

var key = subscription.getKey(name);

Parameters

name

A DOMString representing the encryption method used to generate a client key.  The value can be:

• p256dh: An Elliptic curve Diffie–Hellman public key on the P-256 curve (that is, the NIST secp256r1 elliptic curve).  The resulting key is an uncompressed point in ANSI X9.62 format.
• auth: An authentication secret, as described in Message Encryption for Web Push.

Returns

An ArrayBuffer.

Example

reg.pushManager.getSubscription()
  .then(function(subscription) {
  // Enable any UI which subscribes / unsubscribes from
  // push messages.

  subBtn.disabled = false;

  if (!subscription) {
    console.log('Not yet subscribed to Push')
    // We aren't subscribed to push, so set UI
    // to allow the user to enable push
    return;
  }

  // Set your UI to show they have subscribed for
  // push messages
  subBtn.textContent = 'Unsubscribe from Push Messaging';
  isPushEnabled = true;

  // initialize status, which includes setting UI elements for subscribed status
  // and updating Subscribers list via push
  var endpoint = subscription.endpoint;
  var key = subscription.getKey('p256dh');
  var auth = subscription.getKey('auth');

    ...

Specifications

Browser Compatibility

BCD tables only load in the browser