feat:#39 added fetcher for SeminarGroups

backend/service/fetch/v3/fetchClient.go

@@ -0,0 +1,41 @@
+package v3
+
+import (
+	"fmt"
+	"io"
+	"net/http"
+)
+
+func requestJSON(url string, client *http.Client) (string, error) {
+	// Send GET request with the given URL and special headers
+
+	req, err := http.NewRequest("GET", url, nil)
+	if err != nil {
+		fmt.Printf("Error occurred while creating the request: %s\n", err.Error())
+		return "", err
+	}
+	// add header -H 'accept: application/ld+json'
+	req.Header.Add("accept", "application/ld+json")
+
+	response, err := client.Do(req)
+
+	if err != nil {
+		fmt.Printf("Error occurred while making the request: %s\n", err.Error())
+		return "", err
+	}
+	defer func(Body io.ReadCloser) {
+		err := Body.Close()
+		if err != nil {
+			return
+		}
+	}(response.Body)
+
+	// Read the response body
+	body, err := io.ReadAll(response.Body)
+
+	if err != nil {
+		fmt.Printf("Error occurred while reading the response: %s\n", err.Error())
+		return "", err
+	}
+	return string(body), err
+}