Serving h over SSL in development

If you want to annotate a site that’s served over HTTPS then you’ll need to serve h over HTTPS as well, since the browser will refuse to load external scripts (eg. H’s bookmarklet) via HTTP on a page served via HTTPS.

To serve your local dev instance of h over HTTPS:

  1. Generate a private key and certificate signing request:

    openssl req -newkey rsa:1024 -nodes -keyout .tlskey.pem -out .tlscsr.pem
  2. Generate a self-signed certificate:

    openssl x509 -req -in .tlscsr.pem -signkey .tlskey.pem -out .tlscert.pem
  3. Run the dev server with SSL:

    make devssl
  4. Since the certificate is self-signed, you will need to instruct your browser to trust it explicitly by visiting https://localhost:5000 and selecting the option to bypass the validation error.


Insecure Response errors in the console

The sidebar fails to load and you see net::ERR_INSECURE_RESPONSE errors in the console. You need to open https://localhost:5000 and tell the browser to allow access to the site even though the certificate isn’t known.

Server not found, the connection was reset

When you’re serving h over SSL in development making non-SSL requests to h won’t work.

If you get an error like Server not found or The connection was reset in your browser (it varies from browser to browser), possibly accompanied by a gunicorn crash with AttributeError: 'NoneType' object has no attribute 'uri', make sure that you’re loading https://localhost:5000 in your browser, not http://.

WebSocket closed abnormally, code: 1006

If you see the error message Error: WebSocket closed abnormally, code: 1006 in your browser, possibly accompanied by another error message like Firefox can’t establish a connection to the server at wss://localhost:5001/ws, this can be because you need to add a security exception to allow your browser to connect to the websocket. Visit https://localhost:5001 in a browser tab and add a security exception then try again.

403 response when connecting to WebSocket

If your browser is getting a 403 response when trying to connect to the WebSocket along with error messages like these:

  • WebSocket connection to ‘wss://localhost:5001/ws’ failed: Error during WebSocket handshake: Unexpected response code: 403
  • Check that your H service is configured to allow WebSocket connections from
  • WebSocket closed abnormally, code: 1006
  • WebSocket closed abnormally, code: 1001
  • Firefox can’t establish a connection to the server at wss://localhost:5001/ws

make sure that you’re opening https://localhost:5000 in your browser and not