httprepo: long arguments support (issue2126)
Send the command arguments in the HTTP headers. The command is still part
of the URL. If the server does not have the 'httpheader' capability, the
client will send the command arguments in the URL as it did previously.
Web servers typically allow more data to be placed within the headers than
in the URL, so this approach will:
- Avoid HTTP errors due to using a URL that is too large.
- Allow Mercurial to implement a more efficient wire protocol.
An alternate approach is to send the arguments as part of the request body.
This approach has been rejected because it requires the use of POST
requests, so it would break any existing configuration that relies on the
request type for authentication or caching.
Extensibility:
- The header size is provided by the server, which makes it possible to
introduce an hgrc setting for it.
- The client ignores the capability value after the first comma, which
allows more information to be included in the future.
$ hg init a
$ cd a
$ echo a > a
$ hg ci -Ama -d '1123456789 0'
adding a
$ hg --config server.uncompressed=True serve -p $HGPORT -d --pid-file=hg.pid
$ cat hg.pid >> $DAEMON_PIDS
$ cd ..
$ ("$TESTDIR/tinyproxy.py" $HGPORT1 localhost >proxy.log 2>&1 </dev/null &
$ echo $! > proxy.pid)
$ cat proxy.pid >> $DAEMON_PIDS
$ sleep 2
url for proxy, stream
$ http_proxy=http://localhost:$HGPORT1/ hg --config http_proxy.always=True clone --uncompressed http://localhost:$HGPORT/ b
streaming all changes
3 files to transfer, 303 bytes of data
transferred * bytes in * seconds (*/sec) (glob)
updating to branch default
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
$ cd b
$ hg verify
checking changesets
checking manifests
crosschecking files in changesets and manifests
checking files
1 files, 1 changesets, 1 total revisions
$ cd ..
url for proxy, pull
$ http_proxy=http://localhost:$HGPORT1/ hg --config http_proxy.always=True clone http://localhost:$HGPORT/ b-pull
requesting all changes
adding changesets
adding manifests
adding file changes
added 1 changesets with 1 changes to 1 files
updating to branch default
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
$ cd b-pull
$ hg verify
checking changesets
checking manifests
crosschecking files in changesets and manifests
checking files
1 files, 1 changesets, 1 total revisions
$ cd ..
host:port for proxy
$ http_proxy=localhost:$HGPORT1 hg clone --config http_proxy.always=True http://localhost:$HGPORT/ c
requesting all changes
adding changesets
adding manifests
adding file changes
added 1 changesets with 1 changes to 1 files
updating to branch default
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
proxy url with user name and password
$ http_proxy=http://user:passwd@localhost:$HGPORT1 hg clone --config http_proxy.always=True http://localhost:$HGPORT/ d
requesting all changes
adding changesets
adding manifests
adding file changes
added 1 changesets with 1 changes to 1 files
updating to branch default
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
url with user name and password
$ http_proxy=http://user:passwd@localhost:$HGPORT1 hg clone --config http_proxy.always=True http://user:passwd@localhost:$HGPORT/ e
requesting all changes
adding changesets
adding manifests
adding file changes
added 1 changesets with 1 changes to 1 files
updating to branch default
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
bad host:port for proxy
$ http_proxy=localhost:$HGPORT2 hg clone --config http_proxy.always=True http://localhost:$HGPORT/ f
abort: error: Connection refused
[255]
do not use the proxy if it is in the no list
$ http_proxy=localhost:$HGPORT1 hg clone --config http_proxy.no=localhost http://localhost:$HGPORT/ g
requesting all changes
adding changesets
adding manifests
adding file changes
added 1 changesets with 1 changes to 1 files
updating to branch default
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
$ cat proxy.log
* - - [*] "GET http://localhost:$HGPORT/?cmd=capabilities HTTP/1.1" - - (glob)
* - - [*] "GET http://localhost:$HGPORT/?cmd=stream_out HTTP/1.1" - - (glob)
* - - [*] "GET http://localhost:$HGPORT/?cmd=listkeys HTTP/1.1" - - x-arg-1:namespace=bookmarks (glob)
* - - [*] "GET http://localhost:$HGPORT/?cmd=capabilities HTTP/1.1" - - (glob)
* - - [*] "GET http://localhost:$HGPORT/?cmd=heads HTTP/1.1" - - (glob)
* - - [*] "GET http://localhost:$HGPORT/?cmd=getbundle HTTP/1.1" - - x-arg-1:common=0000000000000000000000000000000000000000&heads=83180e7845de420a1bb46896fd5fe05294f8d629 (glob)
* - - [*] "GET http://localhost:$HGPORT/?cmd=listkeys HTTP/1.1" - - x-arg-1:namespace=bookmarks (glob)
* - - [*] "GET http://localhost:$HGPORT/?cmd=capabilities HTTP/1.1" - - (glob)
* - - [*] "GET http://localhost:$HGPORT/?cmd=heads HTTP/1.1" - - (glob)
* - - [*] "GET http://localhost:$HGPORT/?cmd=getbundle HTTP/1.1" - - x-arg-1:common=0000000000000000000000000000000000000000&heads=83180e7845de420a1bb46896fd5fe05294f8d629 (glob)
* - - [*] "GET http://localhost:$HGPORT/?cmd=listkeys HTTP/1.1" - - x-arg-1:namespace=bookmarks (glob)
* - - [*] "GET http://localhost:$HGPORT/?cmd=capabilities HTTP/1.1" - - (glob)
* - - [*] "GET http://localhost:$HGPORT/?cmd=heads HTTP/1.1" - - (glob)
* - - [*] "GET http://localhost:$HGPORT/?cmd=getbundle HTTP/1.1" - - x-arg-1:common=0000000000000000000000000000000000000000&heads=83180e7845de420a1bb46896fd5fe05294f8d629 (glob)
* - - [*] "GET http://localhost:$HGPORT/?cmd=listkeys HTTP/1.1" - - x-arg-1:namespace=bookmarks (glob)
* - - [*] "GET http://localhost:$HGPORT/?cmd=capabilities HTTP/1.1" - - (glob)
* - - [*] "GET http://localhost:$HGPORT/?cmd=heads HTTP/1.1" - - (glob)
* - - [*] "GET http://localhost:$HGPORT/?cmd=getbundle HTTP/1.1" - - x-arg-1:common=0000000000000000000000000000000000000000&heads=83180e7845de420a1bb46896fd5fe05294f8d629 (glob)
* - - [*] "GET http://localhost:$HGPORT/?cmd=listkeys HTTP/1.1" - - x-arg-1:namespace=bookmarks (glob)