Register types DMaaP mediator producer

Issue-ID: NONRTRIC-583
Signed-off-by: elinuxhenrik <henrik.b.andersson@est.tech>
Change-Id: I2f8536cb54a1a0e9a44adbd806af3b7ad8e90e61
diff --git a/dmaap-mediator-producer/internal/restclient/HTTPClient.go b/dmaap-mediator-producer/internal/restclient/HTTPClient.go
new file mode 100644
index 0000000..c6eb24c
--- /dev/null
+++ b/dmaap-mediator-producer/internal/restclient/HTTPClient.go
@@ -0,0 +1,103 @@
+// -
+//   ========================LICENSE_START=================================
+//   O-RAN-SC
+//   %%
+//   Copyright (C) 2021: 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 restclient
+
+import (
+	"bytes"
+	"fmt"
+	"io"
+	"net/http"
+)
+
+// HTTPClient interface
+type HTTPClient interface {
+	Get(url string) (*http.Response, error)
+
+	Do(*http.Request) (*http.Response, error)
+}
+
+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))
+}
+
+var (
+	Client HTTPClient
+)
+
+func init() {
+	Client = &http.Client{}
+}
+
+func Get(url string) ([]byte, error) {
+	if response, err := Client.Get(url); err == nil {
+		defer response.Body.Close()
+		if responseData, err := io.ReadAll(response.Body); err == nil {
+			if isResponseSuccess(response.StatusCode) {
+				return responseData, nil
+			} else {
+				requestError := RequestError{
+					StatusCode: response.StatusCode,
+					Body:       responseData,
+				}
+				return nil, requestError
+			}
+		} else {
+			return nil, err
+		}
+	} else {
+		return nil, err
+	}
+}
+
+func Put(url string, body []byte) error {
+	if req, reqErr := http.NewRequest(http.MethodPut, url, bytes.NewBuffer(body)); reqErr == nil {
+		req.Header.Set("Content-Type", "application/json; charset=utf-8")
+		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 {
+	responseData, _ := io.ReadAll(response.Body)
+	putError := RequestError{
+		StatusCode: response.StatusCode,
+		Body:       responseData,
+	}
+	return putError
+}