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author | Niall Sheridan <nsheridan@gmail.com> | 2016-08-27 01:32:30 +0100 |
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committer | Niall Sheridan <nsheridan@gmail.com> | 2016-08-27 01:32:30 +0100 |
commit | 921818bca208f0c70e85ec670074cb3905cbbc82 (patch) | |
tree | 4aa67ad2bb2083bd486db3f99680d6d08a2c36b3 /vendor/cloud.google.com/go/internal | |
parent | 7f1c9358805302344a89c1fed4eab1342931b061 (diff) |
Update dependencies
Diffstat (limited to 'vendor/cloud.google.com/go/internal')
-rw-r--r-- | vendor/cloud.google.com/go/internal/cloud.go | 64 |
1 files changed, 64 insertions, 0 deletions
diff --git a/vendor/cloud.google.com/go/internal/cloud.go b/vendor/cloud.google.com/go/internal/cloud.go new file mode 100644 index 0000000..8e0c8f8 --- /dev/null +++ b/vendor/cloud.google.com/go/internal/cloud.go @@ -0,0 +1,64 @@ +// Copyright 2014 Google Inc. All Rights Reserved. +// +// 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 internal provides support for the cloud packages. +// +// Users should not import this package directly. +package internal + +import ( + "fmt" + "net/http" +) + +const userAgent = "gcloud-golang/0.1" + +// Transport is an http.RoundTripper that appends Google Cloud client's +// user-agent to the original request's user-agent header. +type Transport struct { + // TODO(bradfitz): delete internal.Transport. It's too wrappy for what it does. + // Do User-Agent some other way. + + // Base is the actual http.RoundTripper + // requests will use. It must not be nil. + Base http.RoundTripper +} + +// RoundTrip appends a user-agent to the existing user-agent +// header and delegates the request to the base http.RoundTripper. +func (t *Transport) RoundTrip(req *http.Request) (*http.Response, error) { + req = cloneRequest(req) + ua := req.Header.Get("User-Agent") + if ua == "" { + ua = userAgent + } else { + ua = fmt.Sprintf("%s %s", ua, userAgent) + } + req.Header.Set("User-Agent", ua) + return t.Base.RoundTrip(req) +} + +// cloneRequest returns a clone of the provided *http.Request. +// The clone is a shallow copy of the struct and its Header map. +func cloneRequest(r *http.Request) *http.Request { + // shallow copy of the struct + r2 := new(http.Request) + *r2 = *r + // deep copy of the Header + r2.Header = make(http.Header) + for k, s := range r.Header { + r2.Header[k] = s + } + return r2 +} |