Seed code for O-DU slice assurance new repo

[nonrtric/rapp/ransliceassurance.git] / smoversion / internal / restclient / client.go

diff --git a/smoversion/internal/restclient/client.go b/smoversion/internal/restclient/client.go
new file mode 100644 (file)
index 0000000..c31fa1d
--- /dev/null
+++ b/smoversion/internal/restclient/client.go
@@ -0,0 +1,196 @@
+// -
+//   ========================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"
+       "encoding/json"
+       "fmt"
+       "io"
+       "net/http"
+       "net/http/httputil"
+
+       log "github.com/sirupsen/logrus"
+)
+
+type RequestError struct {
+       StatusCode int
+       Body       []byte
+}
+
+func (e RequestError) Error() string {
+       return fmt.Sprintf("error response with status: %v and body: %v", e.StatusCode, string(e.Body))
+}
+
+type Client struct {
+       httpClient *http.Client
+       verbose    bool
+}
+
+func New(httpClient *http.Client, verbose bool) *Client {
+       return &Client{
+               httpClient: httpClient,
+               verbose:    verbose,
+       }
+}
+
+func (c *Client) Get(path string, v interface{}, userInfo ...string) error {
+       var req *http.Request
+       var err error
+
+       if len(userInfo) > 1 {
+               req, err = c.newRequest(http.MethodGet, path, nil, userInfo[0], userInfo[1])
+       } else {
+               req, err = c.newRequest(http.MethodGet, path, nil)
+       }
+
+       if err != nil {
+               return fmt.Errorf("failed to create GET request: %w", err)
+       }
+
+       if err := c.doRequest(req, v); err != nil {
+               return err
+       }
+
+       return nil
+}
+
+func (c *Client) Post(path string, payload interface{}, v interface{}, userInfo ...string) error {
+       var req *http.Request
+       var err error
+
+       if len(userInfo) > 1 {
+               req, err = c.newRequest(http.MethodPost, path, payload, userInfo[0], userInfo[1])
+       } else {
+               req, err = c.newRequest(http.MethodPost, path, payload)
+       }
+
+       if err != nil {
+               return fmt.Errorf("failed to create POST request: %w", err)
+       }
+
+       if err := c.doRequest(req, v); err != nil {
+               return err
+       }
+
+       return nil
+}
+
+func (c *Client) Put(path string, payload interface{}, v interface{}, userName string, password string) error {
+       req, err := c.newRequest(http.MethodPut, path, payload, userName, password)
+       if err != nil {
+               return fmt.Errorf("failed to create PUT request: %w", err)
+       }
+
+       if err := c.doRequest(req, v); err != nil {
+               return err
+       }
+
+       return nil
+}
+
+func (c *Client) newRequest(method, path string, payload interface{}, userInfo ...string) (*http.Request, error) {
+       var reqBody io.Reader
+
+       if payload != nil {
+               bodyBytes, err := json.Marshal(payload)
+               if err != nil {
+                       return nil, fmt.Errorf("failed to marshal request body: %w", err)
+               }
+               reqBody = bytes.NewReader(bodyBytes)
+       }
+
+       req, err := http.NewRequest(method, path, reqBody)
+
+       if err != nil {
+               return nil, fmt.Errorf("failed to create HTTP request: %w", err)
+       }
+
+       if len(userInfo) > 0 {
+               req.SetBasicAuth(userInfo[0], userInfo[1])
+       }
+
+       if reqBody != nil {
+               req.Header.Set("Content-Type", "application/json")
+       }
+
+       if c.verbose {
+               if reqDump, error := httputil.DumpRequest(req, true); error != nil {
+                       fmt.Println(err)
+               } else {
+                       fmt.Println(string(reqDump))
+               }
+       }
+
+       return req, nil
+}
+
+func (c *Client) doRequest(r *http.Request, v interface{}) error {
+       resp, err := c.do(r)
+       if err != nil {
+               return err
+       }
+
+       if resp == nil {
+               return nil
+       }
+       defer resp.Body.Close()
+
+       if v == nil {
+               return nil
+       }
+
+       dec := json.NewDecoder(resp.Body)
+       if err := dec.Decode(&v); err != nil {
+               return fmt.Errorf("could not parse response body: %w [%s:%s]", err, r.Method, r.URL.String())
+       }
+       log.Debugf("Http Client Response: %v\n", v)
+       return nil
+}
+
+func (c *Client) do(r *http.Request) (*http.Response, error) {
+       resp, err := c.httpClient.Do(r)
+       if err != nil {
+               return nil, fmt.Errorf("failed to make request [%s:%s]: %w", r.Method, r.URL.String(), err)
+       }
+
+       if c.verbose {
+               if responseDump, error := httputil.DumpResponse(resp, true); error != nil {
+                       fmt.Println(err)
+               } else {
+                       fmt.Println(string(responseDump))
+               }
+       }
+
+       if resp.StatusCode >= http.StatusOK && resp.StatusCode <= 299 {
+               return resp, nil
+       }
+
+       defer resp.Body.Close()
+       responseData, _ := io.ReadAll(resp.Body)
+
+       putError := RequestError{
+               StatusCode: resp.StatusCode,
+               Body:       responseData,
+       }
+
+       return resp, putError
+}