/// <summary> /// Deletes CAN object from CAN server. /// </summary> /// <param name="ObjectPath">CAN path to the object.</param> /// <returns>Structure describing whether the function succeeded and response provided by CAN server.</returns> public async Task <CanDeleteResult> CanDeleteObject(string ObjectPath) { log.Trace("(ObjectPath:'{0}')", ObjectPath); NameValueCollection args = new NameValueCollection(); args.Add("arg", ObjectPath); CanApiResult apiResult = await SendRequest("pin/rm", args); CanDeleteResult res = CanDeleteResult.FromApiResult(apiResult); log.Trace("(-):{0}", res); return(res); }
/// <summary> /// Creates a new object based on a result from CAN API including validation checks. /// </summary> /// <param name="ApiResult">CAN API result object to copy values from.</param> /// <returns>Structure describing result of CAN upload operation.</returns> public static CanDeleteResult FromApiResult(CanApiResult ApiResult) { log.Trace("()"); CanDeleteResult res = new CanDeleteResult(ApiResult); if (res.Success) { bool error = false; try { CanDeleteObjectResponse response = JsonConvert.DeserializeObject <CanDeleteObjectResponse>(res.DataStr); res.Pins = response.Pins; // If the object was deleted previously, we might have empty Pins in response. // We are thus OK if we receive success response and no more validation is done. } catch (Exception e) { log.Error("Exception occurred: {0}", e.ToString()); error = true; } if (error) { res.Success = false; res.Message = "Invalid CAN response."; res.IsCanError = false; } } else if (res.Message.ToLowerInvariant() == "not pinned") { res.Success = true; res.Pins = null; } log.Trace("(-)"); return(res); }
/// <summary> /// Thread that is initializes CAN objects during the profile server startup. /// </summary> private async void InitThread() { log.Info("()"); initThreadFinished.Reset(); if (Base.Configuration.CanProfileServerContactInformationHash != null) { log.Debug("Old CAN object hash is '{0}', object {1} change.", Base.Configuration.CanProfileServerContactInformationHash.ToBase58(), Base.Configuration.CanProfileServerContactInformationChanged ? "DID" : "did NOT"); } else { log.Debug("No CAN object found."); } bool deleteOldObject = Base.Configuration.CanProfileServerContactInformationChanged && (Base.Configuration.CanProfileServerContactInformationHash != null); byte[] canObject = canContactInformation.ToByteArray(); log.Trace("CAN object: {0}", canObject.ToHex()); while (!ShutdownSignaling.IsShutdown) { // First delete old CAN object if there is any. bool error = false; if (deleteOldObject) { string objectPath = CanApi.CreateIpfsPathFromHash(Base.Configuration.CanProfileServerContactInformationHash); CanDeleteResult cres = await canApi.CanDeleteObject(objectPath); if (cres.Success) { log.Info("Old CAN object hash '{0}' deleted.", Base.Configuration.CanProfileServerContactInformationHash.ToBase58()); } else { log.Warn("Failed to delete old CAN object hash '{0}', error message '{1}', will retry.", Base.Configuration.CanProfileServerContactInformationHash.ToBase58(), cres.Message); error = true; } } else { log.Trace("No old object to delete."); } if (ShutdownSignaling.IsShutdown) { break; } if (!error) { if (Base.Configuration.CanProfileServerContactInformationChanged) { // Now upload the new object. CanUploadResult cres = await canApi.CanUploadObject(canObject); if (cres.Success) { canContactInformationHash = cres.Hash; log.Info("New CAN object hash '{0}' added.", canContactInformationHash.ToBase58()); break; } log.Warn("Unable to add new object to CAN, error message: '{0}'", cres.Message); } else { canContactInformationHash = Base.Configuration.CanProfileServerContactInformationHash; log.Info("CAN object unchanged since last time, hash is '{0}'.", canContactInformationHash.ToBase58()); break; } } // Retry in 10 seconds. try { await Task.Delay(10000, ShutdownSignaling.ShutdownCancellationTokenSource.Token); } catch { // Catch cancellation exception. } } if (canContactInformationHash != null) { if (Base.Configuration.CanProfileServerContactInformationChanged) { // Save the new data to the database. if (!await SaveProfileServerContactInformation()) { log.Error("Failed to save new profile server contact information values to database."); } } // Finally, start IPNS record refreshing timer. await IpnsRecordRefresh(); } initThreadFinished.Set(); log.Info("(-)"); }