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package api
import (
"bytes"
"context"
"encoding/json"
"fmt"
"io"
"net/http"
"time"
)
// BaseClient provides common HTTP functionality for API clients
type BaseClient struct {
HTTPClient *http.Client
BaseURL string
}
// NewBaseClient creates a new BaseClient with default settings
func NewBaseClient(baseURL string) BaseClient {
return BaseClient{
HTTPClient: &http.Client{Timeout: 15 * time.Second},
BaseURL: baseURL,
}
}
// Get performs a GET request and decodes the JSON response
func (c *BaseClient) Get(ctx context.Context, path string, headers map[string]string, result interface{}) error {
req, err := http.NewRequestWithContext(ctx, "GET", c.BaseURL+path, nil)
if err != nil {
return fmt.Errorf("failed to create request: %w", err)
}
for k, v := range headers {
req.Header.Set(k, v)
}
return c.doJSON(req, result)
}
// Post performs a POST request with JSON body and decodes the response
func (c *BaseClient) Post(ctx context.Context, path string, headers map[string]string, body interface{}, result interface{}) error {
var bodyReader io.Reader
if body != nil {
jsonData, err := json.Marshal(body)
if err != nil {
return fmt.Errorf("failed to marshal request body: %w", err)
}
bodyReader = bytes.NewBuffer(jsonData)
}
req, err := http.NewRequestWithContext(ctx, "POST", c.BaseURL+path, bodyReader)
if err != nil {
return fmt.Errorf("failed to create request: %w", err)
}
if body != nil {
req.Header.Set("Content-Type", "application/json")
}
for k, v := range headers {
req.Header.Set(k, v)
}
return c.doJSON(req, result)
}
// PostForm performs a POST request with form-encoded body
func (c *BaseClient) PostForm(ctx context.Context, path string, headers map[string]string, formData string, result interface{}) error {
req, err := http.NewRequestWithContext(ctx, "POST", c.BaseURL+path, bytes.NewBufferString(formData))
if err != nil {
return fmt.Errorf("failed to create request: %w", err)
}
req.Header.Set("Content-Type", "application/x-www-form-urlencoded")
for k, v := range headers {
req.Header.Set(k, v)
}
return c.doJSON(req, result)
}
// PostEmpty performs a POST request with no body and expects no response body
func (c *BaseClient) PostEmpty(ctx context.Context, path string, headers map[string]string) error {
req, err := http.NewRequestWithContext(ctx, "POST", c.BaseURL+path, nil)
if err != nil {
return fmt.Errorf("failed to create request: %w", err)
}
for k, v := range headers {
req.Header.Set(k, v)
}
resp, err := c.HTTPClient.Do(req)
if err != nil {
return fmt.Errorf("request failed: %w", err)
}
defer resp.Body.Close()
if resp.StatusCode < 200 || resp.StatusCode >= 300 {
body, _ := io.ReadAll(resp.Body)
return fmt.Errorf("API error (status %d): %s", resp.StatusCode, string(body))
}
return nil
}
// Put performs a PUT request with form-encoded body
func (c *BaseClient) Put(ctx context.Context, path string, headers map[string]string, formData string, result interface{}) error {
req, err := http.NewRequestWithContext(ctx, "PUT", c.BaseURL+path, bytes.NewBufferString(formData))
if err != nil {
return fmt.Errorf("failed to create request: %w", err)
}
req.Header.Set("Content-Type", "application/x-www-form-urlencoded")
for k, v := range headers {
req.Header.Set(k, v)
}
return c.doJSON(req, result)
}
// doJSON executes the request and decodes JSON response
func (c *BaseClient) doJSON(req *http.Request, result interface{}) error {
resp, err := c.HTTPClient.Do(req)
if err != nil {
return fmt.Errorf("request failed: %w", err)
}
defer resp.Body.Close()
if resp.StatusCode < 200 || resp.StatusCode >= 300 {
body, _ := io.ReadAll(resp.Body)
return fmt.Errorf("API error (status %d): %s", resp.StatusCode, string(body))
}
if result != nil {
if err := json.NewDecoder(resp.Body).Decode(result); err != nil {
return fmt.Errorf("failed to decode response: %w", err)
}
}
return nil
}
|
