C# Promise.CancelTarget方法代码示例

    public static IPromise<IReadOnlyResult> ApplyAsync(this IAsyncConnection conn, Command query, bool async, bool noItemsIsError, params object[] parameters)
    {
      var result = new Promise<IReadOnlyResult>();
      if (parameters != null)
      {
        for (var i = 0; i < parameters.Length; i++)
        {
          query.WithParam(i.ToString(), parameters[i]);
        }
      }

      result.CancelTarget(
        conn.Process(query, async)
        .Progress((p, m) => result.Notify(p, m))
        .Done(r =>
          {
            try
            {
              var res = conn.AmlContext.FromXml(r, query.Aml, conn);
              var ex = res.Exception;
              if (ex != null && (noItemsIsError || !(ex is NoItemsFoundException)))
              {
                result.Reject(ex);
              }
              else
              {
                result.Resolve(res);
              }
            }
            catch (Exception ex)
            {
              result.Reject(ex);
            }
          }).Fail(ex =>
          {
            result.Reject(ex);
          }));
      return result;
    }

    /// <summary>
    /// Asynchronously gets an HTTP connection to an innovator instance (or proxy) at the given URL
    /// </summary>
    /// <param name="url">URL of the innovator instance (or proxy)</param>
    /// <param name="preferences">Object containing preferences for the connection</param>
    /// <returns>A promise to return a connection object</returns>
    public static IPromise<IRemoteConnection> GetConnection(string url
      , ConnectionPreferences preferences, bool async)
    {
      url = (url ?? "").TrimEnd('/');
      if (!url.EndsWith("/server", StringComparison.OrdinalIgnoreCase)) url += "/Server";
      var configUrl = url + "/mapping.xml";

      var masterService = preferences.HttpService ?? DefaultService.Invoke();
      var arasSerice = preferences.HttpService ?? new DefaultHttpService() { Compression = CompressionType.none };
      Func<ServerMapping, IRemoteConnection> connFactory = m =>
      {
        var uri = (m.Url ?? "").TrimEnd('/');
        if (!uri.EndsWith("/server", StringComparison.OrdinalIgnoreCase)) url += "/Server";
        switch (m.Type)
        {
          case ServerType.Proxy:
            m.Endpoints.Base = new Uri(uri + "/");
            var conn = new Connection.ProxyServerConnection(masterService, m.Endpoints);
            conn.SessionPolicy = preferences.SessionPolicy;
            if (!string.IsNullOrEmpty(preferences.UserAgent))
              conn.DefaultSettings(req => req.UserAgent = preferences.UserAgent);
            return conn;
          default:
            return ArasConn(arasSerice, uri, preferences);
        }
      };

      var result = new Promise<IRemoteConnection>();
      result.CancelTarget(masterService.Execute("GET", configUrl, null, CredentialCache.DefaultCredentials
                                          , async, request =>
        {
          request.UserAgent = preferences.UserAgent;
          request.SetHeader("Accept", "text/xml");
        }).Progress((p, m) => result.Notify(p, m))
        .Done(r => {
          var data = r.AsString();
          if (string.IsNullOrEmpty(data))
          {
            result.Resolve(ArasConn(arasSerice, url, preferences));
          }
          else
          {
            try
            {
              var servers = ServerMapping.FromXml(data).ToArray();
              if (servers.Length < 1)
              {
                result.Resolve(ArasConn(arasSerice, url, preferences));
              }
              else if (servers.Length == 1)
              {
                result.Resolve(connFactory(servers.Single()));
              }
              else
              {
                foreach (var server in servers)
                {
                  server.Factory = connFactory;
                }
                result.Resolve(new MappedConnection(servers));
              }
            }
            catch (XmlException)
            {
              result.Resolve(ArasConn(arasSerice, url, preferences));
            }
          }
        }).Fail(ex => {
          result.Resolve(ArasConn(arasSerice, url, preferences));
        }));
      return result;
    }

    /// <summary>
    /// Get a single item from the database using the specified query asynchronously.  If the result is not a single item, an exception will be thrown
    /// </summary>
    /// <param name="conn">Server connection</param>
    /// <param name="action">SOAP action</param>
    /// <param name="request">Query/command which should return a single item</param>
    /// <param name="async">Whether to perform this request asynchronously</param>
    /// <returns>A promise to return a single readonly item</returns>
    public static IPromise<IReadOnlyItem> ItemByQuery(this IConnection conn, Command request, bool async)
    {
      var result = new Promise<IReadOnlyItem>();
      result.CancelTarget(conn.ProcessAsync(request, async)
        .Progress((p, m) => result.Notify(p, m))
        .Done(r =>
        {
          if (string.IsNullOrEmpty(conn.UserId))
          {
            result.Reject(new LoggedOutException());
          }
          else
          {
            var res = conn.AmlContext.FromXml(r, request.Aml, conn);
            var ex = res.Exception;
            if (ex == null)
            {

              try
              {
                result.Resolve(res.AssertItem());
              }
              catch (Exception exc)
              {
                result.Reject(exc);
              }
            }
            else
            {
              result.Reject(ex);
            }
          }
        }).Fail(ex => result.Reject(ex)));
      return result;
    }

    private IPromise<AuthenticationSchemes> CheckAuthentication(Vault vault, bool async)
    {
      var result = new Promise<AuthenticationSchemes>();

      if (vault.Authentication == AuthenticationSchemes.None && _conn.Version >= 11)
      {
        var hReq = (HttpWebRequest)System.Net.WebRequest.Create(vault.Url);
        hReq.Credentials = null;
        hReq.UnsafeAuthenticatedConnectionSharing = true;
        hReq.Method = "HEAD";

        var req = new WebRequest(hReq, CompressionType.none);
        result.CancelTarget(
          req.Execute(async)
          .Progress((p, m) => result.Notify(p, m))
          .Done(r =>
          {
            vault.Authentication = AuthenticationSchemes.Anonymous;
            result.Resolve(vault.Authentication);
          }).Fail(ex =>
          {
            var webEx = ex as HttpException;
            if (webEx != null && webEx.Response.StatusCode == HttpStatusCode.Unauthorized)
            {
              vault.Authentication = req.CheckForNotAuthorized(webEx.Response);
              result.Resolve(vault.Authentication);
            }
            else
            {
              result.Reject(ex);
            }
          }));
      }
      else
      {
        result.Resolve(AuthenticationSchemes.Anonymous);
      }

      return result;
    }

 private IPromise<string> PolicyToken(PolicyTokenType type, string userId
                                     , string database, bool async)
 {
   var result = new Promise<string>();
   result.CancelTarget(PolicyService(type.ToString(), userId, database, async)
     .Progress((p, m) => result.Notify(p, m))
     .Done(r => {
       result.Resolve(r.AsString());
     })
     .Fail(ex =>
     {
       if (ex is NullReferenceException || ex is HttpException)
       {
         result.Resolve(string.Empty);
       }
       else
       {
         result.Reject(ex);
       }
     }));
   return result;
 }

//.........这里部分代码省略.........
              buffer[i++] = (byte)'|';
              if (usernameLength > 0)
                i += Encoding.UTF8.GetBytes(username, 0, username.Length, buffer, i);
              buffer[i++] = (byte)'|';
              if (passwordLength > 0) password.UseBytes<bool>((ref byte[] b) =>
              {
                for (var j = 0; j < b.Length; j++)
                {
                  buffer[j + i] = b[j];
                }
                i += b.Length;
                return false;
              });

              encodedData = Convert.ToBase64String(r.Result1.Encryptor.Encrypt(buffer, 0, i));
            }
            finally
            {
              for (var j = 0; j < buffer.Length; j++)
              {
                buffer[j] = 0;
              }
            }
            return Query(r.Result1.Content + " " + encodedData, "ValidateUser", "<Item/>"
              , this.SessionPolicy , r.Result2, async);
          }
          else
          {
            // Windows authentication
            return Query(r.Result1.SsoUrl, r.Result1.Content, "ValidateUser", "<Item/>"
              , this.SessionPolicy, r.Result2, winCred.Credentials, async
              , req => req.SetHeader("DATABASE", winCred.Database));
          }
        });
      }

      loginPromise.Progress((p, m) => result.Notify(p, m))
        .Done(r => {
          _database = database;

          var data = r.AsXml().DescendantsAndSelf("Result").FirstOrDefault();
          _userId = data.Element("id").Value;

          var auth = data.Element("Authorization");
          _renewalToken = new TokenCredentials(auth.Element("refresh_token").Value);
          _renewalToken.Database = database;
          SetSessionToken(auth.Element("access_token").Value
            , int.Parse(auth.Element("expires_in").Value));

          var i18n = data.Element("i18nsessioncontext");
          var context = new ServerContext();
          context.DefaultLanguageCode = i18n.Element("default_language_code").Value;
          context.DefaultLanguageSuffix = i18n.Element("default_language_suffix").Value;
          context.LanguageCode = i18n.Element("language_code").Value;
          context.LanguageSuffix = i18n.Element("language_suffix").Value;
          context.Locale = i18n.Element("locale").Value;
          context.TimeZone = i18n.Element("time_zone").Value;
          _factory = new ElementFactory(context);

          var upload = data.Element("WriteVault") == null
            ? null : data.Element("WriteVault").Element("Item");
          if (upload == null)
          {
            var strategy = new DefaultVaultStrategy();
            strategy.Initialize(this);
            _writeVault = strategy.WritePriority(true).Convert(v => v.First());
          }
          else
          {
            _writeVault = Promises.Resolved(Vault.GetVault(
              (IReadOnlyItem)_factory.FromXml(upload.ToString())));
          }

          result.Resolve(_userId);
        }).Fail(ex => {
          var httpEx = ex as HttpException;
          if (httpEx != null
            && httpEx.Response.StatusCode == System.Net.HttpStatusCode.Unauthorized)
          {
            var auth = AuthenticationScheme.Parse(httpEx.Response.Headers["WWW-Authenticate"])
              .FirstOrDefault(a => a.Name == "bearer");
            string msg;
            if (auth != null && auth.Parameters.TryGetValue("error_description", out msg))
            {
              result.Reject(new Exception("Error logging in: " + msg));
            }
            else
            {
              result.Reject(new Exception("Unanticipated error logging in."));
            }
          }
          else
          {
            result.Reject(ex);
          }
        });
      result.CancelTarget(loginPromise);

      return result;
    }

 internal IPromise<string> GetResult(string action, string request, bool async)
 {
   var result = new Promise<string>();
   result.CancelTarget(
     UploadAml(_innovatorServerUrl, "ApplyItem", request, async)
       .Progress((p, m) => result.Notify(p, m))
       .Done(r =>
       {
         var res = _factory.FromXml(r.AsString(), request, this);
         if (res.Exception == null)
         {
           result.Resolve(res.Value);
         }
         else
         {
           result.Reject(res.Exception);
         }
       }).Fail(ex => { result.Reject(ex); }));
   return result;
 }

    public IPromise<string> Login(ICredentials credentials, bool async)
    {
      var explicitCred = credentials as ExplicitCredentials;
      if (explicitCred == null) throw new NotSupportedException("This connection implementation only supports explicit credentials");

      _httpDatabase = explicitCred.Database;
      _httpUsername = explicitCred.Username;
      _httpPassword = explicitCred.Password == null ? _httpPassword
        : explicitCred.Password.UseBytes<string>((ref byte[] b) =>
                                                  CalcMd5(ref b).ToLowerInvariant());
      _lastCredentials = credentials;

      var result = new Promise<string>();
      result.CancelTarget(
        Process(new Command("<Item/>").WithAction(CommandAction.ValidateUser), async)
          .Progress((p, m) => result.Notify(p, m))
          .Done(r =>
          {
            string xml;
            using (var reader = new StreamReader(r))
            {
              xml = reader.ReadToEnd();
            }

            var data = XElement.Parse(xml).DescendantsAndSelf("Result").FirstOrDefault();
            if (data == null)
            {
              var res = ElementFactory.Local.FromXml(xml);
              var ex = res.Exception ?? ElementFactory.Local.ServerException("Failed to login");
              ex.SetDetails(_httpDatabase, "<Item/>");

              _httpDatabase = null;
              _httpUsername = null;
              _httpPassword = null;
              result.Reject(ex);
            }
            else
            {
              foreach (var elem in data.Elements())
              {
                switch (elem.Name.LocalName)
                {
                  case "id":
                    _userId = elem.Value;
                    break;
                  case "i18nsessioncontext":
                    var context = new ServerContext();
                    _context.DefaultLanguageCode = elem.Element("default_language_code").Value;
                    _context.DefaultLanguageSuffix = elem.Element("default_language_suffix").Value;
                    _context.LanguageCode = elem.Element("language_code").Value;
                    _context.LanguageSuffix = elem.Element("language_suffix").Value;
                    _context.Locale = elem.Element("locale").Value;
                    _context.TimeZone = elem.Element("time_zone").Value;
                    break;
                  case "ServerInfo":
                    foreach (var info in elem.Elements())
                    {
                      if (info.Name.LocalName == "Version")
                        _arasVersion = int.Parse(info.Value.Substring(0, info.Value.IndexOf('.')));

                      if (!string.IsNullOrEmpty(elem.Value))
                        _serverInfo.Add(new KeyValuePair<string, string>("ServerInfo/" + elem.Name.LocalName, elem.Value));
                    }
                    break;
                  default:
                    if (!string.IsNullOrEmpty(elem.Value))
                      _serverInfo.Add(new KeyValuePair<string, string>(elem.Name.LocalName, elem.Value));
                    break;
                }
              }

              _vaultConn.VaultStrategy.Initialize(this);
              result.Resolve(_userId);
            }
          }).Fail(ex =>
          {
            _httpDatabase = null;
            _httpUsername = null;
            _httpPassword = null;
            result.Reject(ex);
          }));
      return result;
    }