Fetch of authorization token

[nonrtric.git] / auth-token-fetch / HTTPClient.go

diff --git a/auth-token-fetch/HTTPClient.go b/auth-token-fetch/HTTPClient.go
new file mode 100644 (file)
index 0000000..ab76b13
--- /dev/null
+++ b/auth-token-fetch/HTTPClient.go
@@ -0,0 +1,106 @@
+// -
+//   ========================LICENSE_START=================================
+//   O-RAN-SC
+//   %%
+//   Copyright (C) 2022: Nordix Foundation
+//   %%
+//   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.
+//   ========================LICENSE_END===================================
+//
+
+package main
+
+import (
+       "bytes"
+       "crypto/tls"
+       "fmt"
+       "io"
+
+       "net/http"
+       "net/url"
+       "time"
+)
+
+// HTTPClient interface
+type HTTPClient interface {
+       Get(url string) (*http.Response, error)
+
+       Do(*http.Request) (*http.Response, error)
+}
+
+func CreateHttpClient(cert tls.Certificate, timeout time.Duration) *http.Client {
+       return &http.Client{
+               Timeout:   timeout,
+               Transport: createTransport(cert),
+       }
+}
+
+type RequestError struct {
+       StatusCode int
+       Body       []byte
+}
+
+func (pe RequestError) Error() string {
+       return fmt.Sprintf("Request failed due to error response with status: %v and body: %v", pe.StatusCode, string(pe.Body))
+}
+
+func Post(url string, body []byte, contentType string, client HTTPClient) error {
+       return do(http.MethodPost, url, body, contentType, client)
+}
+
+func do(method string, url string, body []byte, contentType string, client HTTPClient) error {
+       if req, reqErr := http.NewRequest(method, url, bytes.NewBuffer(body)); reqErr == nil {
+               req.Header.Set("Content-Type", contentType)
+               if response, respErr := client.Do(req); respErr == nil {
+                       if isResponseSuccess(response.StatusCode) {
+                               return nil
+                       } else {
+                               return getRequestError(response)
+                       }
+               } else {
+                       return respErr
+               }
+       } else {
+               return reqErr
+       }
+}
+
+func isResponseSuccess(statusCode int) bool {
+       return statusCode >= http.StatusOK && statusCode <= 299
+}
+
+func getRequestError(response *http.Response) RequestError {
+       defer response.Body.Close()
+       responseData, _ := io.ReadAll(response.Body)
+       putError := RequestError{
+               StatusCode: response.StatusCode,
+               Body:       responseData,
+       }
+       return putError
+}
+
+func createTransport(cert tls.Certificate) *http.Transport {
+       return &http.Transport{
+               TLSClientConfig: &tls.Config{
+                       Certificates: []tls.Certificate{
+                               cert,
+                       },
+                       InsecureSkipVerify: true,
+               },
+       }
+}
+
+func IsUrlSecure(configUrl string) bool {
+       u, _ := url.Parse(configUrl)
+       return u.Scheme == "https"
+}