How to fetch remote files dynamically? (no GM_xmlHttpRequest?)

[mk-pmb]

Update: Solved: A full list of command names can be obtained from the source of the GM4 polyfill. (Hints on @require)

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What is the problem?

I can't find (in the docs here or over at Greasespot Wiki) a violentmonkey-compatible way to fetch remote files dynamically.

How to reproduce it?

1. Visit https://gist.github.com/mk-pmb/3a8faa4cbc7410fbfaccdedfac6360f5
2. Click the "raw" button to install.
3. Visit http://spaceweb.pimpmybyte.de/ (or a gist) and observe console.

What is the expected result?

monkey version: Violentmonkey 2.9.0
monkey foo features: {
  "GM": null,
  "GM_info": "object",
  "GM_getResourceUrl": null,
  "GM_xmlHttpRequest": "function",
  "GM_getResourceText": "function",
  "gm_info": null,
  "gm_getResourceUrl": null,
  "gm_xmlHttpRequest": null
}
monkey foo xhr: Object { … }

What is the actual result?

   "GM_getResourceUrl": null,
-  "GM_xmlHttpRequest": "function",
+  "GM_xmlHttpRequest": null,
   "GM_getResourceText": "function",
@@ … @@
 }
-monkey foo xhr: Object { … }
+ReferenceError: GM_xmlHttpRequest is not defined

Environment

• Browser: Firefox
• Browser version: 56
• Violentmonkey version: 2.9.0
• OS: Ubuntu trusty

[mk-pmb]

Will the fetch API (window.fetch) be privileged/unrestricted when called from within a UserScript?

[ghost]

You should be calling GM_xmlhttpRequest (lower-case http) instead of GM_xmlHttpRequest.
Only GM_xmlhttpRequest is privileged.

[mk-pmb]

Thanks! Where can I look up such details about the VM API? Could have saved me many hours of debugging since I had to guess from the Greasespot Wiki and they only had the new API with uppercase H.

[ghost]

VM follows the old GM3 API, so, use an old version of the GM wiki page. https://wiki.greasespot.net/index.php?title=Greasemonkey_Manual:API&oldid=7385

The only difference that I know of is that VM additionally supports @exclude-match in the metadata block.