feat: add zohal pkg and http util

pkg/util/http.go

@@ -0,0 +1,57 @@
+package util
+
+import (
+	"bytes"
+	"context"
+	"encoding/json"
+	"net/http"
+	"sync"
+)
+
+type HttpClient struct {
+	client *http.Client
+	once   sync.Once
+}
+
+func NewHttpClient() *HttpClient {
+	return &HttpClient{
+		http.DefaultClient,
+		sync.Once{},
+	}
+}
+
+func (h *HttpClient) getClient() *http.Client {
+	h.once.Do(func() {
+		h.client = &http.Client{}
+	})
+	return h.client
+}
+
+func (h *HttpClient) HttpRequest(ctx context.Context, method, url string, body interface{}, headers map[string]string) (*http.Response, error) {
+	payload, err := json.Marshal(body)
+	if err != nil {
+		return nil, err
+	}
+
+	req, err := http.NewRequestWithContext(ctx, method, url, bytes.NewBuffer(payload))
+	if err != nil {
+		return nil, err
+	}
+
+	for headerTitle, headerValue := range headers {
+		req.Header.Set(headerTitle, headerValue)
+	}
+
+	resp, err := h.getClient().Do(req)
+	if err != nil {
+		return nil, err
+	}
+
+	defer resp.Body.Close()
+
+	return &http.Response{
+		Status:     "200 ok",
+		StatusCode: 200,
+		Body:       resp.Body,
+	}, nil
+}