/
client.go
64 lines (56 loc) · 1.7 KB
/
client.go
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//
// Copyright (C) 2019-2021 vdaas.org vald team <vald@vdaas.org>
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// https://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//
package client
import (
"net/http"
"reflect"
"github.com/vdaas/vald/internal/backoff"
"github.com/vdaas/vald/internal/errors"
"github.com/vdaas/vald/internal/log"
htr "github.com/vdaas/vald/internal/net/http/transport"
"golang.org/x/net/http2"
)
type transport struct {
*http.Transport
backoffOpts []backoff.Option
}
// New initializes the HTTP2 transport with exponential backoff and returns the HTTP client for it, or returns any error occurred.
func New(opts ...Option) (*http.Client, error) {
tr := new(transport)
tr.Transport = new(http.Transport)
for _, opt := range append(defaultOptions, opts...) {
if err := opt(tr); err != nil {
werr := errors.ErrOptionFailed(err, reflect.ValueOf(opt))
e := new(errors.ErrCriticalOption)
if errors.As(err, &e) {
log.Error(werr)
return nil, werr
}
log.Warn(werr)
}
}
if err := http2.ConfigureTransport(tr.Transport); err != nil {
return nil, err
}
return &http.Client{
Transport: htr.NewExpBackoff(
htr.WithRoundTripper(tr.Transport),
htr.WithBackoff(
backoff.New(tr.backoffOpts...),
),
),
}, nil
}