Do Google Cloud Platform HTTP Functions Support Route Parameters?

Question

This is a bit simpler a question than I tend to like to come here with but I\'ve been driving myself up the wall trying to find an answer to this and I absolutely cannot-

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Answer 1

I was able to reach out to the support group for this and it appears that yes, this is supported - you just have to use req.path in order to pull the full path and then parse it in some way (I used path-to-regexp)

Sample code:

exports.myFunction = function(req, res) {
    var keys = [];
    var re = pathToRegexp('/:paramA/:paramB/not-a-param/:paramC/also-not-a-param/:paramD?', keys, {strict: false});
    var pathVars = re.exec(req.path);
    if (pathVars) {
        console.log(JSON.stringify(pathVars));
        var paramA = pathVars[1];
        var paramB = pathVars[2];
        var paramC = pathVars[3];
        var paramD = pathVars[4];
        // Do stuff with the rest of your functionality here
        res.status(200).send('Whatever you wanna send');
    }
}

The command line code to deploy this would then look something like gcloud beta functions deploy myFunction --stage-bucket --trigger-http (Full documentation for this command here). Your new endpoint URL will then be https://-.cloudfunctions.net/myFunction, and you can then append subsequent query or route parameters to it when actually making your call (e.g., making a get call to https://-.cloudfunctions.net/myFunction/paramA/paramB/not-a-param/paramC/also-not-a-param/paramD).

Please note that:

1. Your function should be exported under the same name as used in the CLI unless you use the --entry-point flag. This name will be used in your resulting URL.
2. The --stage-bucket command is optional, but I've always used it.
3. Cloud Functions will automatically look to a file named index.js or function.js to find your function, but if you provide a package.json file which contains a main entry, then Cloud Functions will look for it instead.
4. This will, I assume, leave beta at some point, at which you should update to the new command tools.