Clone

HTTPS: git clone https://vervis.peers.community/repos/yEzqv

SSH: git clone USERNAME@vervis.peers.community:yEzqv

Branches

master

2.mdwn

[[!template id=ticket class=task assigned=fr33domlover done=yes]]

[[!meta title=“Persisent connections”]]

Issue

An HTTP connection is made persistent depending on the request the server gets from the client. But the server has a say too. Right now the listener reports a boolean status and it’s mixed with some other value. I’m not even sure it’s correct, and I’d like this to be automated as much as possible, ideally not even take any info from the listener.

Process

Let’s try breaking this down by protocol version.

HTTP 1.0

Request has Keep-Alive | Response has Keep-Live | Persist
---------------------------------------------------------
          No                      No              No
          No                      Yes             No, this is invalid
          Yes                     No              No, listener refuses
          Yes                     Yes             Yes

HTTP 1.1

Request has Close | Response has Close | Persist
------------------------------------------------
        No                  No           Yes
        No                  Yes          No, server refuses
        Yes                 No           No
        Yes                 Yes          No

So all we need to do is… check the response! But how will the library know whether anything was sent? Options:

Use an IORef or StateT to get info from sendResponse
Make the listener return Maybe Response
Rely on the listener to run some function

Decision: Option 2. The listener will return a response, and the library will send it. Also cancel the sendResponse function, unless it can be used in a lower API layer.

Result

Implemented. Will reopen if any issues arise.