Draft: new: scanner: do HTTP POST requests instead of GET

when the consensus parameter bwscanner is 2.

"Using upload instead of download allows the congestion control algorithms to be under control of the sbws Tor client, instead of the Exit relay. This means that sbws can know when slow start has exited."

This is the 1st optimization for #40130 (closed).

The testing HTTP server has been replaced by the one implemented in onbasca just cause a first try on implementing do_POST was successful only for the 1st sbws request. It only implemnts POST RFC 2388.

Co-authored-by: Georg Koppen gk@torproject.org

changed milestone to %sbws: 1.6.x-final

added S61-O2-Maybe - FINISHED Sponsor 61 - FINISHED labels

requested review from @gk

assigned to @juga

mentioned in merge request !140 (closed)

added Q3 label

added 1 commit

• 9399112d - fix: tests: typo

Compare with previous version

added Needs Review label

removed Needs Review label

added Needs Revision label

@mikeperry: this looks essentially good to me now. Feel free to have a second look.

added 2 commits

• f3b44298 - fixup! chg: stem: Log error on stream XOFF_RECV status
• d9dc5227 - fixup! chg: stem: Log also when XOFF_SENT is received

Compare with previous version

marked this merge request as draft from juga/sbws@f3b44298

resolved all threads

removed Needs Revision label

added Needs Review label

Before squashing and creating a new mr, i'd wait a bit in case mike propose other fixes.