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This commit is contained in:
Andre Medeiros 2022-03-12 13:45:50 -05:00
parent 5ad98494ee
commit 907dc5510d
1 changed files with 20 additions and 19 deletions
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39
internal/reddit/client.go
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@ -147,7 +147,7 @@ func (rc *Client) doRequest(r *Request) ([]byte, *RateLimitingInfo, error) {
defer resp.Body.Close() defer resp.Body.Close()
rli := &RateLimitingInfo{Present: false} rli := &RateLimitingInfo{Present: false}
if _, ok := resp.Header[RateLimitRemainingHeader]; ok { if resp.Header.Get(RateLimitRemainingHeader) != "" {
rli.Present = true rli.Present = true
rli.Remaining, _ = strconv.ParseFloat(resp.Header.Get(RateLimitRemainingHeader), 64) rli.Remaining, _ = strconv.ParseFloat(resp.Header.Get(RateLimitRemainingHeader), 64)
rli.Reset, _ = strconv.Atoi(resp.Header.Get(RateLimitResetHeader)) rli.Reset, _ = strconv.Atoi(resp.Header.Get(RateLimitResetHeader))
@ -167,7 +167,7 @@ func (rc *Client) doRequest(r *Request) ([]byte, *RateLimitingInfo, error) {
} }
func (rac *AuthenticatedClient) request(r *Request, rh ResponseHandler, empty interface{}) (interface{}, error) { func (rac *AuthenticatedClient) request(r *Request, rh ResponseHandler, empty interface{}) (interface{}, error) {
if rl, err := rac.isRateLimited(); rl || err != nil { if rac.isRateLimited() {
return nil, ErrRateLimited return nil, ErrRateLimited
} }
@ -191,17 +191,14 @@ func (rac *AuthenticatedClient) request(r *Request, rh ResponseHandler, empty in
} }
} }
if err == nil && rli.Present && rli.Remaining <= RequestRemainingBuffer {
_ = rac.statsd.Incr("reddit.api.ratelimit", r.tags, 0.1)
rac.markRateLimited(rli.Remaining, time.Duration(rli.Reset)*time.Second)
}
if err != nil { if err != nil {
_ = rac.statsd.Incr("reddit.api.errors", r.tags, 0.1) _ = rac.statsd.Incr("reddit.api.errors", r.tags, 0.1)
if strings.Contains(err.Error(), "http2: timeout awaiting response headers") { if strings.Contains(err.Error(), "http2: timeout awaiting response headers") {
return nil, ErrTimeout return nil, ErrTimeout
} }
return nil, err return nil, err
} else {
rac.markRateLimited(rli)
} }
if r.emptyResponseBytes > 0 && len(bb) == r.emptyResponseBytes { if r.emptyResponseBytes > 0 && len(bb) == r.emptyResponseBytes {
@ -219,30 +216,34 @@ func (rac *AuthenticatedClient) request(r *Request, rh ResponseHandler, empty in
return rh(val), nil return rh(val), nil
} }
func (rac *AuthenticatedClient) isRateLimited() (bool, error) { func (rac *AuthenticatedClient) isRateLimited() bool {
if rac.redditId == SkipRateLimiting { if rac.redditId == SkipRateLimiting {
return false, nil return false
} }
key := fmt.Sprintf("reddit:%s:ratelimited", rac.redditId) key := fmt.Sprintf("reddit:%s:ratelimited", rac.redditId)
_, err := rac.redis.Get(context.Background(), key).Result() _, err := rac.redis.Get(context.Background(), key).Result()
return err != redis.Nil
if err == redis.Nil {
return false, nil
} else if err == nil {
return true, nil
} else {
return false, err
}
} }
func (rac *AuthenticatedClient) markRateLimited(remaining float64, duration time.Duration) error { func (rac *AuthenticatedClient) markRateLimited(rli *RateLimitingInfo) error {
if rac.redditId == SkipRateLimiting { if rac.redditId == SkipRateLimiting {
return ErrRequiresRedditId return ErrRequiresRedditId
} }
if !rli.Present {
return nil
}
if rli.Remaining > RequestRemainingBuffer {
return nil
}
_ = rac.statsd.Incr("reddit.api.ratelimit", nil, 0.1)
key := fmt.Sprintf("reddit:%s:ratelimited", rac.redditId) key := fmt.Sprintf("reddit:%s:ratelimited", rac.redditId)
_, err := rac.redis.SetEX(context.Background(), key, remaining, duration).Result() duration := time.Duration(rli.Reset) * time.Second
_, err := rac.redis.SetEX(context.Background(), key, rli.Remaining, duration).Result()
return err return err
} }