http spec says url/query-sting should be unlimited. this can't be set programatically.

[cekvenich]

var http = require('http')
http.createServer({maxHeaderSize: 16000 }, function () {}).listen(8080)
console.warn(http.maxHeaderSize)

Above does not set the maxHeaderSize. Yes you can do it from CLI, but you should be able to set it programatically.
#24692
expressjs/express#4218

[addaleax]

console.warn(http.maxHeaderSize)

This does not give you the maximum header size for a specific server, only the global default.

[cekvenich]

So how do I find what it is set to?

For sure it does not set it because I have a long query string that works when I set it w/ CLI, but does not work when I set it programmatically.

[addaleax]

Ah, right, that should have been documented. server.maxHeaderSize gives you the value that it has been set to.

[cekvenich]

@addaleax How do I get the handle to the server ? I'm using this from express like so:
http.createServer({maxHeaderSize: 16000 }, ExpInst).listen(8080) console.warn(http.maxHeaderSize)

But in any case in my testing, the maxHeaderSize is not set because it 'blocks' a large request

[addaleax]

@cekvenich

const server = http.createServer({maxHeaderSize: 16000 }, ExpInst).listen(8080)
console.warn(server.maxHeaderSize)

But in any case in my testing, the maxHeaderSize is not set because it 'blocks' a large request

Okay, but without an example/reproduction and information about your system such as Node.js version, there’s really nothing we can do.

[dormesica]

This seems like a good place for getting into the project.
I would like to help with that if that's OK 😁

[cekvenich]

@addaleax I wrote a test to prove it does not work:
https://github.com/cekvenich/node-http-t/blob/master/index.js
But it proved inadvertently that it does work.
ps: I may remove that test repo I linked here.
So I am closing this issue.