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package client
import (
"bytes"
"encoding/json"
"fmt"
"io"
"math/rand"
"net/http"
"net/url"
"os"
"strconv"
"strings"
"time"
"git.db.org.ai/dborg/internal/config"
)
type Client struct {
config *config.Config
httpClient *http.Client
}
func New(cfg *config.Config) (*Client, error) {
if err := cfg.Validate(); err != nil {
return nil, err
}
return newClient(cfg), nil
}
func NewUnauthenticated(cfg *config.Config) (*Client, error) {
return newClient(cfg), nil
}
func newClient(cfg *config.Config) *Client {
return &Client{
config: cfg,
httpClient: &http.Client{
Timeout: cfg.Timeout,
},
}
}
func (c *Client) debugf(format string, args ...interface{}) {
if !c.config.Debug {
return
}
fmt.Fprintf(os.Stderr, "[dborg] "+format+"\n", args...)
}
func redactKey(key string) string {
if len(key) <= 8 {
return "***"
}
return key[:4] + "..." + key[len(key)-4:]
}
func isRetryable(statusCode int) bool {
return statusCode == http.StatusTooManyRequests ||
statusCode == http.StatusRequestTimeout ||
statusCode >= 500
}
func backoffDelay(attempt int, retryAfter string) time.Duration {
if retryAfter != "" {
if secs, err := strconv.Atoi(strings.TrimSpace(retryAfter)); err == nil && secs > 0 {
return time.Duration(secs) * time.Second
}
if t, err := http.ParseTime(retryAfter); err == nil {
if d := time.Until(t); d > 0 {
return d
}
}
}
base := time.Duration(1<<attempt) * time.Second
if base > 30*time.Second {
base = 30 * time.Second
}
jitter := time.Duration(rand.Int63n(int64(base) / 2))
return base + jitter
}
func (c *Client) doRequest(method, path string, params url.Values, body interface{}) ([]byte, error) {
fullURL := c.config.BaseURL + path
if len(params) > 0 {
fullURL += "?" + params.Encode()
}
var bodyBytes []byte
if body != nil {
var err error
bodyBytes, err = json.Marshal(body)
if err != nil {
return nil, fmt.Errorf("failed to marshal request body: %w", err)
}
}
c.debugf("→ %s %s (api_key=%s)", method, fullURL, redactKey(c.config.APIKey))
if len(bodyBytes) > 0 {
c.debugf(" body: %s", string(bodyBytes))
}
var lastErr error
for attempt := 0; attempt <= c.config.MaxRetries; attempt++ {
if attempt > 0 {
delay := backoffDelay(attempt, "")
if lastErr != nil {
if ra, ok := retryAfterFromErr(lastErr); ok {
delay = backoffDelay(attempt, ra)
}
}
c.debugf(" retry %d/%d after %s (last error: %v)", attempt, c.config.MaxRetries, delay, lastErr)
time.Sleep(delay)
}
var reqBody io.Reader
if bodyBytes != nil {
reqBody = bytes.NewReader(bodyBytes)
}
req, err := http.NewRequest(method, fullURL, reqBody)
if err != nil {
return nil, fmt.Errorf("failed to create request: %w", err)
}
req.Header.Set("X-API-Key", c.config.APIKey)
req.Header.Set("User-Agent", c.config.UserAgent)
if bodyBytes != nil {
req.Header.Set("Content-Type", "application/json")
}
start := time.Now()
resp, err := c.httpClient.Do(req)
if err != nil {
lastErr = err
c.debugf("← network error after %s: %v", time.Since(start), err)
continue
}
respBody, readErr := io.ReadAll(resp.Body)
resp.Body.Close()
c.debugf("← %d %s (%s, %d bytes)", resp.StatusCode, http.StatusText(resp.StatusCode), time.Since(start), len(respBody))
if readErr != nil {
lastErr = fmt.Errorf("failed to read response body: %w", readErr)
if !isRetryable(resp.StatusCode) {
return nil, lastErr
}
continue
}
if resp.StatusCode == http.StatusOK || resp.StatusCode == http.StatusCreated {
return respBody, nil
}
lastErr = httpError(resp.StatusCode, respBody, resp.Header.Get("Retry-After"))
if !isRetryable(resp.StatusCode) {
return nil, lastErr
}
}
return nil, lastErr
}
type apiError struct {
status int
message string
retryAfter string
}
func (e *apiError) Error() string { return e.message }
func retryAfterFromErr(err error) (string, bool) {
if ae, ok := err.(*apiError); ok && ae.retryAfter != "" {
return ae.retryAfter, true
}
return "", false
}
func httpError(status int, body []byte, retryAfter string) error {
msg := string(body)
var formatted string
switch status {
case http.StatusForbidden:
formatted = fmt.Sprintf("access denied (403): %s - This endpoint requires premium access", msg)
case http.StatusUnauthorized:
formatted = fmt.Sprintf("unauthorized (401): %s - Check your API key", msg)
case http.StatusTooManyRequests:
formatted = fmt.Sprintf("rate limit exceeded (429): %s", msg)
case http.StatusBadRequest:
formatted = fmt.Sprintf("bad request (400): %s", msg)
default:
formatted = fmt.Sprintf("API request failed with status %d: %s", status, msg)
}
return &apiError{status: status, message: formatted, retryAfter: retryAfter}
}
func (c *Client) Get(path string, params url.Values) ([]byte, error) {
return c.doRequest(http.MethodGet, path, params, nil)
}
func (c *Client) Post(path string, body interface{}) ([]byte, error) {
return c.doRequest(http.MethodPost, path, nil, body)
}
func (c *Client) Delete(path string) ([]byte, error) {
return c.doRequest(http.MethodDelete, path, nil, nil)
}
func (c *Client) Patch(path string, body interface{}) ([]byte, error) {
return c.doRequest(http.MethodPatch, path, nil, body)
}
func (c *Client) Put(path string, body interface{}) ([]byte, error) {
return c.doRequest(http.MethodPut, path, nil, body)
}
func (c *Client) ListServices() ([]byte, error) {
return c.Get("/", nil)
}
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