mirror of
https://github.com/letic/terraform-provider-google.git
synced 2024-09-19 17:50:00 +00:00
e5e1c1e97f
Update all the packages under google.golang.org/api to use the same commit. This is a necessary precursor for using Go modules. There is a breaking API change in the clients, but it's a one line change. As such, Travis will say this doesn't build. I've verified after the one line change, it will run the unit tests. That change needs to be made in MM, however. Once this PR is merged, a PR against MM will be opened.
97 lines
2.8 KiB
Go
97 lines
2.8 KiB
Go
// Copyright 2018 Google LLC
|
|
//
|
|
// 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
|
|
//
|
|
// http://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.
|
|
|
|
// +build go1.8
|
|
|
|
// Package propagation implements X-Cloud-Trace-Context header propagation used
|
|
// by Google Cloud products.
|
|
package propagation
|
|
|
|
import (
|
|
"encoding/binary"
|
|
"encoding/hex"
|
|
"fmt"
|
|
"net/http"
|
|
"strconv"
|
|
"strings"
|
|
|
|
"go.opencensus.io/trace"
|
|
"go.opencensus.io/trace/propagation"
|
|
)
|
|
|
|
const (
|
|
httpHeaderMaxSize = 200
|
|
httpHeader = `X-Cloud-Trace-Context`
|
|
)
|
|
|
|
var _ propagation.HTTPFormat = (*HTTPFormat)(nil)
|
|
|
|
// HTTPFormat implements propagation.HTTPFormat to propagate
|
|
// traces in HTTP headers for Google Cloud Platform and Stackdriver Trace.
|
|
type HTTPFormat struct{}
|
|
|
|
// SpanContextFromRequest extracts a Stackdriver Trace span context from incoming requests.
|
|
func (f *HTTPFormat) SpanContextFromRequest(req *http.Request) (sc trace.SpanContext, ok bool) {
|
|
h := req.Header.Get(httpHeader)
|
|
// See https://cloud.google.com/trace/docs/faq for the header HTTPFormat.
|
|
// Return if the header is empty or missing, or if the header is unreasonably
|
|
// large, to avoid making unnecessary copies of a large string.
|
|
if h == "" || len(h) > httpHeaderMaxSize {
|
|
return trace.SpanContext{}, false
|
|
}
|
|
|
|
// Parse the trace id field.
|
|
slash := strings.Index(h, `/`)
|
|
if slash == -1 {
|
|
return trace.SpanContext{}, false
|
|
}
|
|
tid, h := h[:slash], h[slash+1:]
|
|
|
|
buf, err := hex.DecodeString(tid)
|
|
if err != nil {
|
|
return trace.SpanContext{}, false
|
|
}
|
|
copy(sc.TraceID[:], buf)
|
|
|
|
// Parse the span id field.
|
|
spanstr := h
|
|
semicolon := strings.Index(h, `;`)
|
|
if semicolon != -1 {
|
|
spanstr, h = h[:semicolon], h[semicolon+1:]
|
|
}
|
|
sid, err := strconv.ParseUint(spanstr, 10, 64)
|
|
if err != nil {
|
|
return trace.SpanContext{}, false
|
|
}
|
|
binary.BigEndian.PutUint64(sc.SpanID[:], sid)
|
|
|
|
// Parse the options field, options field is optional.
|
|
if !strings.HasPrefix(h, "o=") {
|
|
return sc, true
|
|
}
|
|
o, err := strconv.ParseUint(h[2:], 10, 64)
|
|
if err != nil {
|
|
return trace.SpanContext{}, false
|
|
}
|
|
sc.TraceOptions = trace.TraceOptions(o)
|
|
return sc, true
|
|
}
|
|
|
|
// SpanContextToRequest modifies the given request to include a Stackdriver Trace header.
|
|
func (f *HTTPFormat) SpanContextToRequest(sc trace.SpanContext, req *http.Request) {
|
|
sid := binary.BigEndian.Uint64(sc.SpanID[:])
|
|
header := fmt.Sprintf("%s/%d;o=%d", hex.EncodeToString(sc.TraceID[:]), sid, int64(sc.TraceOptions))
|
|
req.Header.Set(httpHeader, header)
|
|
}
|