Mercurial > hg
view tests/test-subrepo-relative-path.t @ 37048:fc5e261915b9
wireproto: require POST for all HTTPv2 requests
Wire protocol version 1 transfers argument data via request
headers by default. This has historically caused problems because
servers institute limits on the length of individual HTTP headers
as well as the total size of all request headers. Mercurial servers
can advertise the maximum length of an individual header. But
there's no guarantee any intermediate HTTP agents will accept
headers up to that length.
In the existing wire protocol, server operators typically also
key off the HTTP request method to implement authentication.
For example, GET requests translate to read-only requests and
can be allowed. But read-write commands must use POST and require
authentication. This has typically worked because the only wire
protocol commands that use POST modify the repo (e.g. the
"unbundle" command).
There is an experimental feature to enable clients to transmit
argument data via POST request bodies. This is technically a
better and more robust solution. But we can't enable it by default
because of servers assuming POST means write access.
In version 2 of the wire protocol, the permissions of a request
are encoded in the URL. And with it being a new protocol in a new
URL space, we're not constrained by backwards compatibility
requirements.
This commit adopts the technically superior mechanism of using
HTTP request bodies to send argument data by requiring POST for
all commands. Strictly speaking, it may be possible to send
request bodies on GET requests. But my experience is that not all
HTTP stacks support this. POST pretty much always works. Using POST
for read-only operations does sacrifice some RESTful design
purity. But this API cares about practicality, not about being
in Roy T. Fielding's REST ivory tower.
There's a chance we may relax this restriction in the future. But
for now, I want to see how far we can get with a POST only API.
Differential Revision: https://phab.mercurial-scm.org/D2837
author | Gregory Szorc <gregory.szorc@gmail.com> |
---|---|
date | Tue, 13 Mar 2018 11:57:43 -0700 |
parents | b394778b1a50 |
children | b4b7427b5786 |
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#require killdaemons Preparing the subrepository 'sub' $ hg init sub $ echo sub > sub/sub $ hg add -R sub adding sub/sub $ hg commit -R sub -m "sub import" Preparing the 'main' repo which depends on the subrepo 'sub' $ hg init main $ echo main > main/main $ echo "sub = ../sub" > main/.hgsub $ hg clone sub main/sub updating to branch default 1 files updated, 0 files merged, 0 files removed, 0 files unresolved $ hg add -R main adding main/.hgsub adding main/main $ hg commit -R main -m "main import" Cleaning both repositories, just as a clone -U $ hg up -C -R sub null 0 files updated, 0 files merged, 1 files removed, 0 files unresolved $ hg up -C -R main null 0 files updated, 0 files merged, 3 files removed, 0 files unresolved $ rm -rf main/sub hide outer repo $ hg init Serving them both using hgweb $ printf '[paths]\n/main = main\nsub = sub\n' > webdir.conf $ hg serve --webdir-conf webdir.conf -a localhost -p $HGPORT \ > -A /dev/null -E /dev/null --pid-file hg.pid -d $ cat hg.pid >> $DAEMON_PIDS Clone main from hgweb $ hg clone "http://localhost:$HGPORT/main" cloned requesting all changes adding changesets adding manifests adding file changes added 1 changesets with 3 changes to 3 files new changesets fdfeeb3e979e updating to branch default cloning subrepo sub from http://localhost:$HGPORT/sub requesting all changes adding changesets adding manifests adding file changes added 1 changesets with 1 changes to 1 files new changesets 863c1745b441 3 files updated, 0 files merged, 0 files removed, 0 files unresolved Checking cloned repo ids $ hg id -R cloned fdfeeb3e979e tip $ hg id -R cloned/sub 863c1745b441 tip subrepo debug for 'main' clone $ hg debugsub -R cloned path sub source ../sub revision 863c1745b441bd97a8c4a096e87793073f4fb215 Test sharing with a remote URL reference $ hg init absolute_subrepo $ cd absolute_subrepo $ echo foo > foo.txt $ hg ci -Am 'initial commit' adding foo.txt $ echo "sub = http://localhost:$HGPORT/sub" > .hgsub $ hg ci -Am 'add absolute subrepo' adding .hgsub $ cd .. Clone pooling works for local clones with a remote subrepo reference. The subrepo is cloned to the pool and shared from there, so that all clones will share the same subrepo. $ hg --config extensions.share= --config share.pool=$TESTTMP/pool \ > clone absolute_subrepo cloned_from_abs (sharing from new pooled repository 8d6a2f1e993b34b6557de0042cfe825ae12a8dae) requesting all changes adding changesets adding manifests adding file changes added 2 changesets with 3 changes to 3 files new changesets 8d6a2f1e993b:* (glob) searching for changes no changes found updating working directory cloning subrepo sub from http://localhost:$HGPORT/sub (sharing from new pooled repository 863c1745b441bd97a8c4a096e87793073f4fb215) requesting all changes adding changesets adding manifests adding file changes added 1 changesets with 1 changes to 1 files new changesets 863c1745b441 searching for changes no changes found 3 files updated, 0 files merged, 0 files removed, 0 files unresolved Vanilla sharing with a subrepo remote path reference will clone the subrepo. Each share of these top level repos will end up with independent subrepo copies (potentially leaving the shared parent with dangling cset references). $ hg --config extensions.share= share absolute_subrepo shared_from_abs updating working directory cloning subrepo sub from http://localhost:$HGPORT/sub requesting all changes adding changesets adding manifests adding file changes added 1 changesets with 1 changes to 1 files new changesets 863c1745b441 3 files updated, 0 files merged, 0 files removed, 0 files unresolved $ hg --config extensions.share= share -U absolute_subrepo shared_from_abs2 $ hg -R shared_from_abs2 update -r tip cloning subrepo sub from http://localhost:$HGPORT/sub requesting all changes adding changesets adding manifests adding file changes added 1 changesets with 1 changes to 1 files new changesets 863c1745b441 3 files updated, 0 files merged, 0 files removed, 0 files unresolved A parent repo without its subrepo available locally can be shared if the subrepo is referenced by absolute path. $ hg clone -U absolute_subrepo cloned_null_from_abs $ hg --config extensions.share= share cloned_null_from_abs shared_from_null_abs updating working directory cloning subrepo sub from http://localhost:$HGPORT/sub requesting all changes adding changesets adding manifests adding file changes added 1 changesets with 1 changes to 1 files new changesets 863c1745b441 3 files updated, 0 files merged, 0 files removed, 0 files unresolved $ killdaemons.py subrepo paths with ssh urls $ hg clone -e "\"$PYTHON\" \"$TESTDIR/dummyssh\"" ssh://user@dummy/cloned sshclone requesting all changes adding changesets adding manifests adding file changes added 1 changesets with 3 changes to 3 files new changesets fdfeeb3e979e updating to branch default cloning subrepo sub from ssh://user@dummy/sub requesting all changes adding changesets adding manifests adding file changes added 1 changesets with 1 changes to 1 files new changesets 863c1745b441 3 files updated, 0 files merged, 0 files removed, 0 files unresolved $ hg -R sshclone push -e "\"$PYTHON\" \"$TESTDIR/dummyssh\"" ssh://user@dummy/`pwd`/cloned pushing to ssh://user@dummy/$TESTTMP/cloned pushing subrepo sub to ssh://user@dummy/$TESTTMP/sub searching for changes no changes found searching for changes no changes found [1] $ cat dummylog Got arguments 1:user@dummy 2:hg -R cloned serve --stdio Got arguments 1:user@dummy 2:hg -R sub serve --stdio Got arguments 1:user@dummy 2:hg -R $TESTTMP/cloned serve --stdio Got arguments 1:user@dummy 2:hg -R $TESTTMP/sub serve --stdio