A small snippet to use CoCoPilot without patching Copilot plugin

_CoCoPilot.md

cocopilot-gh-enterprise

Turn cocopilot into github enterprise server, so that we can use CoCoPilot without patching Copilot plugin.

Usage

1. Add the following JS to a cloudflare worker.
2. Add Cloudflare Worker Routes: *cocopilot-gh-enterprise.XXXXXXXX.XXX. You should also add DNS records cocopilot-gh-enterprise.XXXXXXXX.XXX & *.cocopilot-gh-enterprise.XXXXXXXX.XXX to make the route available
3. Setting GitHub Enterprise URL to cocopilot-gh-enterprise.XXXXXXXX.XXX
4. Setting Copilot settings: Add to settings.json

  "github.copilot.advanced": {
      "authProvider": "github-enterprise",
  },

5. Login to the fake GitHub Enterprise: click the user profile icon lower right corner to login to copilot
6. Click Yes in the dialog at lower right corner:
7. Click Continue to GitHub:
8. Click Cancel:
9. Enter cocopilot's token into new dialog then press Enter:
10. Logged in & Enjoy:

cocopilot-gh-enterprise.js

const COCOPILOT_TOKEN_URL = "https://blog.teqiyi.com/cocopilot/" // the url in "dev_override":{"copilot_token_url":"https://XXXXXXX"}}
const GH_ENTERPRISE_USERNAME = "CoCoPilot" // username to be displayed in VSCode

export default {
  async fetch(request, env, ctx) {
    const url = new URL(request.url);

    switch (url.pathname) {
      case '/copilot_internal/v2/token':
        var auth = request.headers['Authorization']
        // var authpart = auth.trim().split(' ')
        // var authbody = authpart[authpart.length - 1]
        return fetch(COCOPILOT_TOKEN_URL, {
          method: "GET",
          headers: {
            Accept: "*/*",
            Authorization: auth,
            Connection: 'close',
            'Editor-Plugin-Version': 'copilot/1.137.0',
            'Editor-Version': 'vscode/1.81.1',
            'User-Agent': 'GithubCopilot/1.137.0',
          }
        })

      case '/api/v3':
        return new Response(
          JSON.stringify({  }),
          { headers: {
              "Content-Type":                  "application/json; charset=utf-8",
              "X-OAuth-Scopes":                "user:email",
              "X-Accepted-OAuth-Scopes":       "",
              "x-oauth-client-id":             "01ab8ac9400c4e429b23",
              "X-GitHub-Media-Type":           "github.v3; format=json",
              "x-github-api-version-selected": "2022-11-28",
          } });

      case '/api/v3/user':
        return new Response(
          JSON.stringify({
            "id":       123456,
            "location": null,
            "login":    GH_ENTERPRISE_USERNAME,
            "type":     "User",
          }),
          { headers: {
              "Content-Type":                  "application/json; charset=utf-8",
          } });

      case '/api/v3/meta':
        return new Response(
          JSON.stringify({  }),
          { headers: {
              "Content-Type":                  "application/json; charset=utf-8",
          } });
    }
		
		return new Response(
			`cocopilot-gh-enterprise`,
			{ headers: { "Content-Type": "text/html" } }
		);
  },
};