github.com/jonaz/heapster@v1.3.0-beta.0.0.20170208112634-cd3c15ca3d29/common/elasticsearch/aws.go (about) 1 // Copyright 2015 Google Inc. All Rights Reserved. 2 // 3 // Licensed under the Apache License, Version 2.0 (the "License"); 4 // you may not use this file except in compliance with the License. 5 // You may obtain a copy of the License at 6 // 7 // http://www.apache.org/licenses/LICENSE-2.0 8 // 9 // Unless required by applicable law or agreed to in writing, software 10 // distributed under the License is distributed on an "AS IS" BASIS, 11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12 // See the License for the specific language governing permissions and 13 // limitations under the License. 14 package elasticsearch 15 16 import ( 17 "fmt" 18 awsauth "github.com/smartystreets/go-aws-auth" 19 "net/http" 20 "os" 21 ) 22 23 type AWSSigningTransport struct { 24 HTTPClient *http.Client 25 Credentials awsauth.Credentials 26 } 27 28 // RoundTrip implementation 29 func (a AWSSigningTransport) RoundTrip(req *http.Request) (*http.Response, error) { 30 return a.HTTPClient.Do(awsauth.Sign4(req, a.Credentials)) 31 } 32 33 func createAWSClient() (*http.Client, error) { 34 id := os.Getenv("AWS_ACCESS_KEY_ID") 35 if id == "" { 36 id = os.Getenv("AWS_ACCESS_KEY") 37 } 38 39 secret := os.Getenv("AWS_SECRET_ACCESS_KEY") 40 if secret == "" { 41 secret = os.Getenv("AWS_SECRET_KEY") 42 } 43 44 if id == "" || secret == "" { 45 return nil, fmt.Errorf("Failed to configure AWS authentication. Both `AWS_ACCESS_KEY_ID` and " + 46 "`AWS_SECRET_ACCESS_KEY` environment veriables required") 47 } 48 49 signingTransport := AWSSigningTransport{ 50 Credentials: awsauth.Credentials{ 51 AccessKeyID: id, 52 SecretAccessKey: secret, 53 }, 54 HTTPClient: http.DefaultClient, 55 } 56 return &http.Client{Transport: http.RoundTripper(signingTransport)}, nil 57 }