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Add hub to PublishJob, expose Notify
Adds a Hub field to PublishJob Exposes Notify to use in other workers
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1 @@ | ||
| .idea/ |
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,6 @@ | ||
| package model | ||
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| type Hub struct { | ||
| Hasher string `json:"hasher"` | ||
| URL string `json:"url"` | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,62 @@ | ||
| package websub | ||
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| import ( | ||
| "bytes" | ||
| "crypto/hmac" | ||
| "encoding/hex" | ||
| "errors" | ||
| "fmt" | ||
| "github.com/jpillora/backoff" | ||
| "net/http" | ||
| "time" | ||
| ) | ||
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| func Notify(client *http.Client, job PublishJob) (bool, error) { | ||
| req, err := http.NewRequest(http.MethodPost, job.Subscription.Callback, bytes.NewReader(job.Data)) | ||
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| if err != nil { | ||
| return false, err | ||
| } | ||
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| if job.Subscription.Secret != "" { | ||
| mac := hmac.New(newHash(job.Hub.Hasher), []byte(job.Subscription.Secret)) | ||
| mac.Write(job.Data) | ||
| req.Header.Set("X-Hub-Signature", job.Hub.Hasher+"="+hex.EncodeToString(mac.Sum(nil))) | ||
| } | ||
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| req.Header.Set("Content-Type", job.ContentType) | ||
| req.Header.Set("Link", fmt.Sprintf("<%s>; rel=\"hub\", <%s>; rel=\"self\"", job.Hub.URL, job.Subscription.Topic)) | ||
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| b := &backoff.Backoff{ | ||
| Min: 100 * time.Millisecond, | ||
| Max: 10 * time.Minute, | ||
| Factor: 2, | ||
| Jitter: false, | ||
| } | ||
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| var attempts int | ||
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| for { | ||
| res, err := client.Do(req) | ||
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| if err == nil { | ||
| res.Body.Close() | ||
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| if res.StatusCode >= 200 && res.StatusCode <= 299 { | ||
| return true, nil | ||
| } else if res.StatusCode == http.StatusGone { | ||
| return false, nil | ||
| } | ||
| } | ||
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| attempts++ | ||
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| if attempts >= 3 { | ||
| break | ||
| } | ||
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| <-time.After(b.Duration()) | ||
| } | ||
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| return false, errors.New("failed to publish after 3 attempts") | ||
| } |
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