Request protocol version is hardcoded to HTTP/1.1

[tvdijen]

SAML-tracer/src/SAMLTrace.js

Line 332 in 7ccf8a6

let reqText = this.request.method + ' ' + this.request.url + ' HTTP/1.1\n';

This should print the actual protocol version used

[khlr]

This hardcoded value actually dates back to the initial release from 2011.

When I converted SAML-tracer to a WebExtension in 2017, I also stumbled across this detail, but found no way to determine the version programmatically.
But even today I can't find a way to do that. Neither in the Chrome webRequest documentation nor at MDN can I find anything about this.

However, I agree that a hard-coded value could very easily be misleading...

[NicolasCARPi]

@khlr for Firefox you can use statusLine https://developer.mozilla.org/en-US/docs/Mozilla/Add-ons/WebExtensions/API/webRequest/onCompleted#statusline

with something along the lines of:

function httpVersionFromStatusLine(statusLine) {
  // Examples: "HTTP/1.1 200 OK", "HTTP/2 200", sometimes empty
  const m = /^HTTP\/[0-9.]+/i.exec(statusLine || "");
  return m ? m[0].toUpperCase() : null;
}

[tvdijen]

Seems supported by Chrome as well: https://developer.chrome.com/docs/extensions/reference/api/webRequest?hl=en#property-onCompleted-callback-details-statusLine