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[performance] wrap httpclient response body to ensure drained before close (#1854)

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Signed-off-by: kim <grufwub@gmail.com>
This commit is contained in:
kim 2023-06-02 09:34:52 +01:00 committed by GitHub
parent 55aacaf4b0
commit 20978b1278
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5 changed files with 33 additions and 10 deletions
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2
go.mod
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@ -9,7 +9,7 @@ require (
codeberg.org/gruf/go-debug v1.3.0
codeberg.org/gruf/go-errors/v2 v2.2.0
codeberg.org/gruf/go-fastcopy v1.1.2
codeberg.org/gruf/go-iotools v0.0.0-20221224124424-3386841cb225
codeberg.org/gruf/go-iotools v0.0.0-20230601182242-d933b07dcbef
codeberg.org/gruf/go-kv v1.6.1
codeberg.org/gruf/go-logger/v2 v2.2.1
codeberg.org/gruf/go-mutexes v1.1.5

4
go.sum
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@ -64,8 +64,8 @@ codeberg.org/gruf/go-fastpath/v2 v2.0.0 h1:iAS9GZahFhyWEH0KLhFEJR+txx1ZhMXxYzu2q
codeberg.org/gruf/go-fastpath/v2 v2.0.0/go.mod h1:3pPqu5nZjpbRrOqvLyAK7puS1OfEtQvjd6342Cwz56Q=
codeberg.org/gruf/go-hashenc v1.0.2 h1:U3jH6zMXZiL96czD/qaJd8OR2h7LlBzGv/2WxnMHI/g=
codeberg.org/gruf/go-hashenc v1.0.2/go.mod h1:eK+A8clLcEN/m1nftNsRId0kfYDQnETnuIfBGZ8Gvsg=
codeberg.org/gruf/go-iotools v0.0.0-20221224124424-3386841cb225 h1:tP9YvEBfADGG3mXkfrALLadlcbrZsFsWKZvFtUZtrt8=
codeberg.org/gruf/go-iotools v0.0.0-20221224124424-3386841cb225/go.mod h1:B8uq4yHtIcKXhBZT9C/SYisz25lldLHMVpwZPz4ADLQ=
codeberg.org/gruf/go-iotools v0.0.0-20230601182242-d933b07dcbef h1:3Ydviw47TFEk27FRCOXkRxU3MfgyNzoicLzq8J3NbtI=
codeberg.org/gruf/go-iotools v0.0.0-20230601182242-d933b07dcbef/go.mod h1:B8uq4yHtIcKXhBZT9C/SYisz25lldLHMVpwZPz4ADLQ=
codeberg.org/gruf/go-kv v1.6.1 h1:HsCZEy0zfGq1oFGOEOO2qnpooiGefCZBbcUpa3KdXn8=
codeberg.org/gruf/go-kv v1.6.1/go.mod h1:O/YkSvKiS9XsRolM3rqCd9YJmND7dAXu9z+PrlYO4bc=
codeberg.org/gruf/go-logger/v2 v2.2.1 h1:RP2u059EQKTBFV3cN8X6xDxNk2RkzqdgXGKflKqB7Oc=

27
internal/httpclient/client.go
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@ -34,6 +34,7 @@
"codeberg.org/gruf/go-byteutil"
"codeberg.org/gruf/go-cache/v3"
errorsv2 "codeberg.org/gruf/go-errors/v2"
"codeberg.org/gruf/go-iotools"
"codeberg.org/gruf/go-kv"
"github.com/superseriousbusiness/gotosocial/internal/gtscontext"
"github.com/superseriousbusiness/gotosocial/internal/gtserror"
@ -265,7 +266,8 @@ func (c *Client) DoSigned(r *http.Request, sign SignFunc) (rsp *http.Response, e
}
}
// Ensure unset.
// Close + unset rsp.
_ = rsp.Body.Close()
rsp = nil
} else if errorsv2.Comparable(err,
@ -326,11 +328,6 @@ func (c *Client) do(req *http.Request) (*http.Response, error) {
return nil, err
}
// Check response body not too large.
if rsp.ContentLength > c.bodyMax {
return nil, ErrBodyTooLarge
}
// Seperate the body implementers.
rbody := (io.Reader)(rsp.Body)
cbody := (io.Closer)(rsp.Body)
@ -345,11 +342,29 @@ func (c *Client) do(req *http.Request) (*http.Response, error) {
// Don't trust them, limit body reads.
rbody = io.LimitReader(rbody, limit)
// Wrap closer to ensure entire body drained BEFORE close.
cbody = iotools.CloserAfterCallback(cbody, func() {
_, _ = discard.ReadFrom(rbody)
})
// Wrap body with limit.
rsp.Body = &struct {
io.Reader
io.Closer
}{rbody, cbody}
// Check response body not too large.
if rsp.ContentLength > c.bodyMax {
_ = rsp.Body.Close()
return nil, ErrBodyTooLarge
}
return rsp, nil
}
// cast discard writer to full interface it supports.
var discard = io.Discard.(interface { //nolint
io.Writer
io.StringWriter
io.ReaderFrom
})

8
vendor/codeberg.org/gruf/go-iotools/close.go generated vendored
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@ -17,6 +17,14 @@ func CloserCallback(c io.Closer, cb func()) io.Closer {
})
}
func CloserAfterCallback(c io.Closer, cb func()) io.Closer {
return CloserFunc(func() (err error) {
defer func() { err = c.Close() }()
cb()
return
})
}
// CloseOnce wraps an io.Closer to ensure it only performs the close logic once.
func CloseOnce(c io.Closer) io.Closer {
return CloserFunc(func() error {

2
vendor/modules.txt vendored
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@ -36,7 +36,7 @@ codeberg.org/gruf/go-fastpath/v2
# codeberg.org/gruf/go-hashenc v1.0.2
## explicit; go 1.16
codeberg.org/gruf/go-hashenc
# codeberg.org/gruf/go-iotools v0.0.0-20221224124424-3386841cb225
# codeberg.org/gruf/go-iotools v0.0.0-20230601182242-d933b07dcbef
## explicit; go 1.19
codeberg.org/gruf/go-iotools
# codeberg.org/gruf/go-kv v1.6.1