Python demo (x86_64)

Example of running Python (x86_64) on browser using container2wasm.

Source Container image

python:3.11-alpine

Terminal

[launch ENTRYPOINT] [launch shell (sh)] [disable networking]

It can take some time to load and start the container.

Example

Running the following in the container will get the contents of the demo page over HTTP.

import urllib.request
r = urllib.request.Request('https://ktock.github.io/container2wasm-demo/')
with urllib.request.urlopen(r) as response:
    body = response.read()
    print(body.decode('utf-8'))

Note

Container can perform HTTP(S) networking via the HTTP(S) proxy running on the browser. In the container, http_proxy, https_proxy, HTTP_PROXY and HTTPS_PROXY are pre-configured to the proxy's address (http://192.168.127.253:80). The proxy (+ networking stack) run on browser, relying on the browser's Fetch API. So out-of-browser proxy service is NOT used. HTTPS connection is terminated at the proxy and relies on Fetch API for re-encryption so the certificate for the proxy is configured as SSL_CERT_FILE=/.wasmenv/proxy.crt in the container.

The proxy is experimental and has limitations:

The set of accesible sites is limited by browser (e.g. by CORS mechanism).
The container and the proxy don't have the control over Forbidden headers and they are controlled by the browser.

Please see also container2wasm repo for the details and other less-restricted networking methods (e.g. WebSocket + out-of-browser networking stack).

Tested on Google Chrome 116.0.5845.187. More info including docs and source code is available from container2wasm repo. This page is served from container2wasm-demo repo as GitHub Pages.