Add api client code

api.go

@@ -0,0 +1,55 @@
+package gogpt
+
+import (
+	"encoding/json"
+	"fmt"
+	"net/http"
+	"time"
+)
+
+const apiURLv1 = "https://api.openai.com/v1"
+
+// Client is OpenAI GPT-3 API client
+type Client struct {
+	BaseURL    string
+	authToken  string
+	HTTPClient *http.Client
+}
+
+// NewClient creates new OpenAI API client
+func NewClient(authToken string) *Client {
+	return &Client{
+		BaseURL:   apiURLv1,
+		authToken: authToken,
+		HTTPClient: &http.Client{
+			Timeout: time.Minute,
+		},
+	}
+}
+
+func (c *Client) sendRequest(req *http.Request, v interface{}) error {
+	req.Header.Set("Content-Type", "application/json; charset=utf-8")
+	req.Header.Set("Accept", "application/json; charset=utf-8")
+	req.Header.Set("Authorization", fmt.Sprintf("Bearer %s", c.authToken))
+
+	res, err := c.HTTPClient.Do(req)
+	if err != nil {
+		return err
+	}
+
+	defer res.Body.Close()
+
+	if res.StatusCode < http.StatusOK || res.StatusCode >= http.StatusBadRequest {
+		return fmt.Errorf("error, status code: %d", res.StatusCode)
+	}
+
+	if err = json.NewDecoder(res.Body).Decode(&v); err != nil {
+		return err
+	}
+
+	return nil
+}
+
+func (c *Client) fullURL(suffix string) string {
+	return fmt.Sprintf("%s%s", c.BaseURL, suffix)
+}