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transport.go
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transport.go
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package sacloud
import (
"log"
"net/http/httputil"
"go.uber.org/ratelimit"
"net/http"
"sync"
)
// RateLimitRoundTripper 秒間アクセス数を制限するためのhttp.RoundTripper実装
type RateLimitRoundTripper struct {
// Transport 親となるhttp.RoundTripper、nilの場合http.DefaultTransportが利用される
Transport http.RoundTripper
// RateLimitPerSec 秒あたりのリクエスト数
RateLimitPerSec int
once sync.Once
rateLimit ratelimit.Limiter
}
// RoundTrip http.RoundTripperの実装
func (r *RateLimitRoundTripper) RoundTrip(req *http.Request) (*http.Response, error) {
r.once.Do(func() {
r.rateLimit = ratelimit.New(r.RateLimitPerSec)
})
if r.Transport == nil {
r.Transport = http.DefaultTransport
}
r.rateLimit.Take()
return r.Transport.RoundTrip(req)
}
// TracingRoundTripper リクエスト/レスポンスのトレースログを出力するためのhttp.RoundTripper実装
type TracingRoundTripper struct {
// Transport 親となるhttp.RoundTripper、nilの場合http.DefaultTransportが利用される
Transport http.RoundTripper
}
// RoundTrip http.RoundTripperの実装
func (r *TracingRoundTripper) RoundTrip(req *http.Request) (*http.Response, error) {
if r.Transport == nil {
r.Transport = http.DefaultTransport
}
data, err := httputil.DumpRequest(req, true)
if err != nil {
return nil, err
}
log.Printf("[TRACE] \trequest: %s %s\n==============================\n%s\n============================\n", req.Method, req.URL.String(), string(data))
res, err := r.Transport.RoundTrip(req)
if err != nil {
return nil, err
}
data, err = httputil.DumpResponse(res, true)
if err != nil {
return nil, err
}
log.Printf("[TRACE] \tresponse: %s %s\n==============================\n%s\n============================\n", req.Method, req.URL.String(), string(data))
return res, err
}