Created
October 1, 2025 17:38
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servicebus
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| package main | |
| import ( | |
| "context" | |
| "encoding/base64" | |
| "encoding/json" | |
| "log" | |
| "net/http" | |
| "os" | |
| "time" | |
| "github.com/Azure/azure-sdk-for-go/sdk/messaging/azservicebus" | |
| "github.com/gin-gonic/gin" | |
| ) | |
| type Token struct { | |
| Queue string `json:"q"` | |
| SessionID string `json:"s"` | |
| LockToken string `json:"l"` | |
| } | |
| func main() { | |
| connStr := os.Getenv("SERVICEBUS_CONNECTION_STRING") | |
| queue := os.Getenv("SERVICEBUS_QUEUE") | |
| client, _ := azservicebus.NewClientFromConnectionString(connStr, nil) | |
| defer client.Close(context.Background()) | |
| r := gin.Default() | |
| // Pull: pega 1 msg e devolve body + token | |
| r.GET("/pull", func(c *gin.Context) { | |
| sessionID := c.Query("sessionId") | |
| ctx, cancel := context.WithTimeout(c, 10*time.Second) | |
| defer cancel() | |
| sr, err := client.AcceptSessionForQueue(ctx, queue, sessionID, nil) | |
| if err != nil { | |
| c.JSON(500, gin.H{"error": err.Error()}) | |
| return | |
| } | |
| defer sr.Close(context.Background()) | |
| msgs, err := sr.ReceiveMessages(ctx, 1, nil) | |
| if err != nil || len(msgs) == 0 { | |
| c.JSON(200, gin.H{"messages": []string{}}) | |
| return | |
| } | |
| m := msgs[0] | |
| lockToken := base64.RawURLEncoding.EncodeToString(m.LockToken[:]) | |
| tokenObj := Token{Queue: queue, SessionID: sessionID, LockToken: lockToken} | |
| tokenBytes, _ := json.Marshal(tokenObj) | |
| token := base64.RawURLEncoding.EncodeToString(tokenBytes) | |
| c.JSON(200, gin.H{ | |
| "body": string(m.Body), | |
| "token": token, | |
| "note": "Esse token deve ser usado no /complete dentro do tempo do lock (~30s-5min)", | |
| }) | |
| }) | |
| // Complete: recebe token e completa msg | |
| r.POST("/complete", func(c *gin.Context) { | |
| var req struct{ Token string `json:"token"` } | |
| if err := c.BindJSON(&req); err != nil { | |
| c.JSON(400, gin.H{"error": "envie {token}"}) | |
| return | |
| } | |
| decoded, _ := base64.RawURLEncoding.DecodeString(req.Token) | |
| var t Token | |
| _ = json.Unmarshal(decoded, &t) | |
| ctx, cancel := context.WithTimeout(c, 15*time.Second) | |
| defer cancel() | |
| sr, err := client.AcceptSessionForQueue(ctx, t.Queue, t.SessionID, nil) | |
| if err != nil { | |
| c.JSON(500, gin.H{"error": err.Error()}) | |
| return | |
| } | |
| defer sr.Close(context.Background()) | |
| lockBytes, _ := base64.RawURLEncoding.DecodeString(t.LockToken) | |
| var lt [16]byte | |
| copy(lt[:], lockBytes) | |
| // cria um ReceivedMessage mínimo só com o LockToken | |
| msg := &azservicebus.ReceivedMessage{LockToken: lt} | |
| if err := sr.CompleteMessage(ctx, msg, nil); err != nil { | |
| c.JSON(500, gin.H{"error": err.Error()}) | |
| return | |
| } | |
| c.JSON(200, gin.H{"status": "completed"}) | |
| }) | |
| log.Println("listening :8080") | |
| r.Run(":8080") | |
| } |
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