Update client to handle GET (no body) requests, multipart requests, and JSON requests

restclient/client.go

@@ -1,26 +1,51 @@
 package restclient
 
-import "net/http"
+import (
+	"bytes"
+	"encoding/json"
+	"mime/multipart"
+	"net/http"
+)
 
-// SendRequest sends an HTTP request to a URL and includes the specified headers and body
+// SendRequest sends an HTTP request to a URL and includes the specified headers and body.
-func SendRequest(url string, method string, headers map[string]string, body map[string]string) (http.Response, error) {
+// A body can be nil for GET requests, a map[string]string for multipart/form-data requests,
-	// Create request
+// or a struct for JSON requests
-	req, err := http.NewRequest(method, url, nil)
+func SendRequest(url string, method string, headers map[string]string, body interface{}) (http.Response, error) {
+	var reqBody *bytes.Buffer
+	var contentType string
+
+	switch v := body.(type) {
+	case nil: // Leave nil for GET requests
+	case map[string]string:
+		reqBody = &bytes.Buffer{}
+		writer := multipart.NewWriter(reqBody)
+		for key, value := range v {
+			writer.WriteField(key, value)
+		}
+		writer.Close()
+		contentType = writer.FormDataContentType()
+	default:
+		jsonBody, err := json.Marshal(body)
+		if err != nil {
+			return http.Response{}, err
+		}
+		reqBody = bytes.NewBuffer(jsonBody)
+		contentType = "application/json"
+	}
+
+	req, err := http.NewRequest(method, url, reqBody)
 	if err != nil {
 		return http.Response{}, err
 	}
 
-	// Add headers
+	if contentType != "" {
+		req.Header.Set("Content-Type", contentType)
+	}
+
 	for key, value := range headers {
 		req.Header.Add(key, value)
 	}
 
-	// Add body
-	for key, value := range body {
-		req.Form.Add(key, value)
-	}
-
-	// Send request
 	client := &http.Client{}
 	resp, err := client.Do(req)
 	if err != nil {