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git/t/t5551-http-fetch.sh
Shawn O. Pearce aa90b9697f Enable info/refs gzip decompression in HTTP client
Some HTTP servers try to use gzip compression on the /info/refs
request to save transfer bandwidth. Repositories with many tags
may find the /info/refs request can be gzipped to be 50% of the
original size due to the few but often repeated bytes used (hex
SHA-1 and commonly digits in tag names).

For most HTTP requests enable "Accept-Encoding: gzip" ensuring
the /info/refs payload can use this encoding format.

Only request gzip encoding from servers. Although deflate is
supported by libcurl, most servers have standardized on gzip
encoding for compression as that is what most browsers support.
Asking for deflate increases request sizes by a few bytes, but is
unlikely to ever be used by a server.

Disable the Accept-Encoding header on probe RPCs as response bodies
are supposed to be exactly 4 bytes long, "0000". The HTTP headers
requesting and indicating compression use more space than the data
transferred in the body.

Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2012-09-20 10:26:50 -07:00

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#!/bin/sh
test_description='test smart fetching over http via http-backend'
. ./test-lib.sh
if test -n "$NO_CURL"; then
skip_all='skipping test, git built without http support'
test_done
fi
LIB_HTTPD_PORT=${LIB_HTTPD_PORT-'5551'}
. "$TEST_DIRECTORY"/lib-httpd.sh
start_httpd
test_expect_success 'setup repository' '
echo content >file &&
git add file &&
git commit -m one
'
test_expect_success 'create http-accessible bare repository' '
mkdir "$HTTPD_DOCUMENT_ROOT_PATH/repo.git" &&
(cd "$HTTPD_DOCUMENT_ROOT_PATH/repo.git" &&
git --bare init
) &&
git remote add public "$HTTPD_DOCUMENT_ROOT_PATH/repo.git" &&
git push public master:master
'
setup_askpass_helper
cat >exp <<EOF
> GET /smart/repo.git/info/refs?service=git-upload-pack HTTP/1.1
> Accept: */*
> Accept-Encoding: gzip
> Pragma: no-cache
< HTTP/1.1 200 OK
< Pragma: no-cache
< Cache-Control: no-cache, max-age=0, must-revalidate
< Content-Type: application/x-git-upload-pack-advertisement
> POST /smart/repo.git/git-upload-pack HTTP/1.1
> Accept-Encoding: gzip
> Content-Type: application/x-git-upload-pack-request
> Accept: application/x-git-upload-pack-result
> Content-Length: xxx
< HTTP/1.1 200 OK
< Pragma: no-cache
< Cache-Control: no-cache, max-age=0, must-revalidate
< Content-Type: application/x-git-upload-pack-result
EOF
test_expect_success 'clone http repository' '
GIT_CURL_VERBOSE=1 git clone --quiet $HTTPD_URL/smart/repo.git clone 2>err &&
test_cmp file clone/file &&
tr '\''\015'\'' Q <err |
sed -e "
s/Q\$//
/^[*] /d
/^$/d
/^< $/d
/^[^><]/{
s/^/> /
}
/^> User-Agent: /d
/^> Host: /d
/^> POST /,$ {
/^> Accept: [*]\\/[*]/d
}
s/^> Content-Length: .*/> Content-Length: xxx/
/^> 00..want /d
/^> 00.*done/d
/^< Server: /d
/^< Expires: /d
/^< Date: /d
/^< Content-Length: /d
/^< Transfer-Encoding: /d
" >act &&
test_cmp exp act
'
test_expect_success 'fetch changes via http' '
echo content >>file &&
git commit -a -m two &&
git push public
(cd clone && git pull) &&
test_cmp file clone/file
'
cat >exp <<EOF
GET /smart/repo.git/info/refs?service=git-upload-pack HTTP/1.1 200
POST /smart/repo.git/git-upload-pack HTTP/1.1 200
GET /smart/repo.git/info/refs?service=git-upload-pack HTTP/1.1 200
POST /smart/repo.git/git-upload-pack HTTP/1.1 200
EOF
test_expect_success 'used upload-pack service' '
sed -e "
s/^.* \"//
s/\"//
s/ [1-9][0-9]*\$//
s/^GET /GET /
" >act <"$HTTPD_ROOT_PATH"/access.log &&
test_cmp exp act
'
test_expect_success 'follow redirects (301)' '
git clone $HTTPD_URL/smart-redir-perm/repo.git --quiet repo-p
'
test_expect_success 'follow redirects (302)' '
git clone $HTTPD_URL/smart-redir-temp/repo.git --quiet repo-t
'
test_expect_success 'clone from password-protected repository' '
echo two >expect &&
set_askpass user@host &&
git clone --bare "$HTTPD_URL/auth/smart/repo.git" smart-auth &&
expect_askpass both user@host &&
git --git-dir=smart-auth log -1 --format=%s >actual &&
test_cmp expect actual
'
test_expect_success 'clone from auth-only-for-push repository' '
echo two >expect &&
set_askpass wrong &&
git clone --bare "$HTTPD_URL/auth-push/smart/repo.git" smart-noauth &&
expect_askpass none &&
git --git-dir=smart-noauth log -1 --format=%s >actual &&
test_cmp expect actual
'
test -n "$GIT_TEST_LONG" && test_set_prereq EXPENSIVE
test_expect_success EXPENSIVE 'create 50,000 tags in the repo' '
(
cd "$HTTPD_DOCUMENT_ROOT_PATH/repo.git" &&
for i in `test_seq 50000`
do
echo "commit refs/heads/too-many-refs"
echo "mark :$i"
echo "committer git <git@example.com> $i +0000"
echo "data 0"
echo "M 644 inline bla.txt"
echo "data 4"
echo "bla"
# make every commit dangling by always
# rewinding the branch after each commit
echo "reset refs/heads/too-many-refs"
echo "from :1"
done | git fast-import --export-marks=marks &&
# now assign tags to all the dangling commits we created above
tag=$("$PERL_PATH" -e "print \"bla\" x 30") &&
sed -e "s/^:\(.\+\) \(.\+\)$/\2 refs\/tags\/$tag-\1/" <marks >>packed-refs
)
'
test_expect_success EXPENSIVE 'clone the 50,000 tag repo to check OS command line overflow' '
git clone $HTTPD_URL/smart/repo.git too-many-refs 2>err &&
test_line_count = 0 err
'
stop_httpd
test_done