110 lines
3 KiB
Go
110 lines
3 KiB
Go
package utils
|
|
|
|
import (
|
|
"context"
|
|
// "crypto/tls"
|
|
"fmt"
|
|
"io"
|
|
"net/http"
|
|
|
|
// "net/url"
|
|
"time"
|
|
)
|
|
|
|
type RetryConfig struct {
|
|
MaxRetries int
|
|
BaseDelay time.Duration
|
|
MaxDelay time.Duration
|
|
}
|
|
|
|
type RetryableHTTPRequestImpl struct {
|
|
client *http.Client
|
|
config RetryConfig
|
|
}
|
|
|
|
func NewRetryableHTTPRequest(config RetryConfig) *RetryableHTTPRequestImpl {
|
|
return NewRetryableHTTPRequestWithProxy(config, "")
|
|
}
|
|
|
|
func NewRetryableHTTPRequestWithProxy(config RetryConfig, proxyURL string) *RetryableHTTPRequestImpl {
|
|
// var transport *http.Transport
|
|
|
|
// if proxyURL != "" {
|
|
// proxyUrl, err := url.Parse(proxyURL)
|
|
// if err != nil {
|
|
// panic(fmt.Sprintf("Failed to parse proxy URL '%s': %v", proxyURL, err))
|
|
// }
|
|
|
|
// transport = &http.Transport{
|
|
// Proxy: http.ProxyURL(proxyUrl),
|
|
// TLSClientConfig: &tls.Config{InsecureSkipVerify: true},
|
|
// }
|
|
// }
|
|
|
|
client := &http.Client{
|
|
Timeout: 30 * time.Second,
|
|
// Transport: transport,
|
|
}
|
|
|
|
return &RetryableHTTPRequestImpl{
|
|
client: client,
|
|
config: config,
|
|
}
|
|
}
|
|
|
|
func (s *RetryableHTTPRequestImpl) RetryableHTTPRequest(ctx context.Context, url, method string, body io.Reader, headers []http.Header) (*http.Response, error) {
|
|
var lastErr error
|
|
|
|
for attempt := 0; attempt <= s.config.MaxRetries; attempt++ {
|
|
req, err := http.NewRequestWithContext(ctx, method, url, body)
|
|
|
|
if err != nil {
|
|
return nil, fmt.Errorf("failed to create request: %w", err)
|
|
}
|
|
|
|
req.Header.Set("User-Agent", "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/91.0.4472.124 Safari/537.36")
|
|
for _, header := range headers {
|
|
req.Header.Set(header.Get("Key"), header.Get("Value"))
|
|
}
|
|
|
|
resp, err := s.client.Do(req)
|
|
if err != nil {
|
|
lastErr = err
|
|
fmt.Printf("Request attempt %d failed: %v\n", attempt+1, err)
|
|
} else if resp.StatusCode >= http.StatusOK && resp.StatusCode < http.StatusMultipleChoices {
|
|
// Success
|
|
return resp, nil
|
|
} else if resp.StatusCode == http.StatusTooManyRequests {
|
|
// 429 Too Many Requests - retry with backoff
|
|
resp.Body.Close()
|
|
lastErr = fmt.Errorf("rate limited: %d %s", resp.StatusCode, resp.Status)
|
|
fmt.Printf("Request attempt %d failed with status %d (rate limited)\n", attempt+1, resp.StatusCode)
|
|
} else {
|
|
// All other errors (4xx, 5xx) - don't retry
|
|
resp.Body.Close()
|
|
return nil, fmt.Errorf("request failed %d: %s", resp.StatusCode, resp.Status)
|
|
}
|
|
|
|
// max attempts for now = 3
|
|
if attempt < s.config.MaxRetries {
|
|
// Increment delay by 2 seconds for each attempt
|
|
delay := time.Second * time.Duration(2*(attempt+1)) // 2s, 4s, 6s, ...
|
|
|
|
// Cap the delay to MaxDelay if set
|
|
if s.config.MaxDelay > 0 && delay > s.config.MaxDelay {
|
|
delay = s.config.MaxDelay
|
|
}
|
|
|
|
fmt.Printf("Retrying in %v... (attempt %d/%d)\n", delay, attempt+1, s.config.MaxRetries)
|
|
|
|
select {
|
|
case <-ctx.Done():
|
|
return nil, ctx.Err()
|
|
case <-time.After(delay):
|
|
// Continue to next attempt
|
|
}
|
|
}
|
|
}
|
|
|
|
return nil, fmt.Errorf("all retry attempts failed, last error: %w", lastErr)
|
|
}
|