1 <h2 id="debugging">Debugging</h2> 2 3 <h3 id="internal-server-error">Internal Server Error</h3> 4 5 <p> 6 The Push Messaging server responds with HTTP status code 500 7 (internal server error) if the app that calls the pushMessaging API 8 is not found in the Chrome Web Store. This ownership check 9 is designed to prevent people from sending messages to your app 10 without your permission. Commonly this error occurs during 11 development if you run a version of your app without the correct 12 <code>key</code> attribute in its manifest file. 13 </p> 14 15 <p> 16 To fix this problem, simply install your app from 17 the Chrome Web Store and copy the <a href="manifest.html#key">key</a> 18 field from manifest.json in the installed app to manifest.json in 19 the version of the app that you are developing 20 (see <a href="cloudMessaging.html#test-cloud">Testing in the cloud</a> for 21 detailed instructions). Note that you need to remove the <code>key</code> 22 field from manifest.json before you upload the app to the Chrome Web Store again. 23 </p> 24
