From 8c12c6939aab9106db14ec2d11d983bc5b29fb2c Mon Sep 17 00:00:00 2001
From: Niall Sheridan <nsheridan@gmail.com>
Date: Sun, 7 Jul 2019 21:33:44 +0100
Subject: Switch to modules

---
 .../exporter/stackdriver/propagation/http.go       | 94 ----------------------
 1 file changed, 94 deletions(-)
 delete mode 100644 vendor/contrib.go.opencensus.io/exporter/stackdriver/propagation/http.go

(limited to 'vendor/contrib.go.opencensus.io/exporter/stackdriver/propagation/http.go')

diff --git a/vendor/contrib.go.opencensus.io/exporter/stackdriver/propagation/http.go b/vendor/contrib.go.opencensus.io/exporter/stackdriver/propagation/http.go
deleted file mode 100644
index 1797d37..0000000
--- a/vendor/contrib.go.opencensus.io/exporter/stackdriver/propagation/http.go
+++ /dev/null
@@ -1,94 +0,0 @@
-// Copyright 2018, OpenCensus Authors
-//
-// 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.
-
-// Package propagation implement X-Cloud-Trace-Context header propagation used
-// by Google Cloud products.
-package propagation // import "contrib.go.opencensus.io/exporter/stackdriver/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)
-}
-- 
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