WebSocket Component
Properties Methods Events Configuration Settings Errors
The WebSocket component is used to establish a WebSocket connection to a server.
Syntax
nsoftware.IPWorks.Websocket
Remarks
The WebSocket component supports both plaintext and SSL/TLS connections. When connecting over SSL/TLS the SSLServerAuthentication event allows you to check the server identity and other security attributes. The SSLStatus event provides information about the SSL handhsake. Additional SSL related settings are also supported via the Config method.
The WebSocket component provides a simple way to establish a WebSocket connection to a server. The server must support the WebSocket protocol. After the connection is established data can be sent and received.
To begin, call the Connect method. After the connection is established you can send and receive data in a variety of ways. To send data you may set the DataToSend property or call Send, SendFile, or SendText. Data is received via the DataIn event.
The component also supports sending and receive data through the use of streams. The SetReceiveStream and SetSendStream methods may be used to specify a stream for sending or receiving.
Property List
The following is the full list of the properties of the component with short descriptions. Click on the links for further details.
| AcceptData | Enables or disables data reception (the DataIn event). |
| Authorization | The Authorization string to be sent to the server. |
| AuthScheme | The authentication scheme to use when server authorization is required. |
| BytesSent | The number of bytes actually sent after an assignment to DataToSend . |
| Connected | Shows whether the component is connected. |
| Cookies | Collection of cookies. |
| DataFormat | The format of the data being sent. |
| DataToSend | A string of data to be sent to the remote host. |
| Firewall | A set of properties related to firewall access. |
| FollowRedirects | Determines what happens when the server issues a redirect. |
| LocalHost | The name of the local host or user-assigned IP interface through which connections are initiated or accepted. |
| Origin | The Origin header field value. |
| OtherHeaders | Other headers as determined by the user (optional). |
| ParsedHeaders | Collection of headers returned from the last request. |
| Password | A password if authentication is to be used. |
| Proxy | A set of properties related to proxy access. |
| SSLAcceptServerCert | Instructs the component to unconditionally accept the server certificate that matches the supplied certificate. |
| SSLCert | The certificate to be used during SSL negotiation. |
| SSLServerCert | The server certificate for the last established connection. |
| SubProtocols | Optional subprotocols supported by the client. |
| Timeout | A timeout for the component. |
| TransferredHeaders | The full set of headers as received from the server. |
| User | A user name if authentication is to be used. |
Method List
The following is the full list of the methods of the component with short descriptions. Click on the links for further details.
| AddCookie | Adds a cookie and the corresponding value to the outgoing request headers. |
| Config | Sets or retrieves a configuration setting . |
| Connect | Connects to the specified host. |
| Disconnect | Disconnects from the remote host. |
| DoEvents | Processes events from the internal message queue. |
| Interrupt | Interrupt the current method. |
| Reset | Reset the component. |
| ResetHeaders | Resets all HTTP Headers, Cookies, LocalFile , and AttachedFile . |
| Send | Sends data to the remote host. |
| SendFile | Sends file to the remote host. |
| SendText | Sends text data to the server. |
| SetReceiveStream | Sets the stream to which received data will be written. |
| SetSendStream | Reads content from the stream and sends it to the server. |
Event List
The following is the full list of the events fired by the component with short descriptions. Click on the links for further details.
| Connected | Fired immediately after a connection completes (or fails). |
| ConnectionStatus | Fired to indicate changes in connection state. |
| DataIn | Fired when data is received. |
| Disconnected | Fired when a connection is closed. |
| Error | Information about errors during data delivery. |
| Header | Fired every time a header line comes in. |
| ReadyToSend | Fired when IPPort is ready to send data. |
| Redirect | Fired when a redirection is received from the server. |
| SetCookie | Fired for every cookie set by the server. |
| SSLServerAuthentication | Fired after the server presents its certificate to the client. |
| SSLStatus | Shows the progress of the secure connection. |
Configuration Settings
The following is a list of configuration settings for the component with short descriptions. Click on the links for further details.
| BufferMessage | Indicates whether or not the entire message is buffered before firing the DataIn event. |
| DisconnectStatusCode | Specifies the status code when closing a connection. |
| DisconnectStatusDescription | Specifies the message associated with the disconnect status code. |
| MaxFrameSize | Specifies the maximum size of the outgoing message in bytes before fragmentation occurs. |
| StatusLine | The first line of the last HTTP server response. |
| TransferredData | The body of the last HTTP server response. |
| URL | The URL to which the component connected. |
| AcceptEncoding | Used to tell the server which types of content encodings the client supports. |
| AllowHTTPCompression | This property enables HTTP compression for receiving data. |
| AllowHTTPFallback | Whether HTTP/2 connections are permitted to fallback to HTTP/1.1. |
| AllowNTLMFallback | Whether to allow fallback from Negotiate to NTLM when authenticating. |
| Append | Whether to append data to LocalFile. |
| Authorization | The Authorization string to be sent to the server. |
| BytesTransferred | Contains the number of bytes transferred in the response data. |
| EncodeURL | If set to true the URL will be encoded by the component. |
| FollowRedirects | Determines what happens when the server issues a redirect. |
| GetOn302Redirect | If set to true the component will perform a GET on the new location. |
| HTTPVersion | The version of HTTP used by the component. |
| HTTP2HeadersWithoutIndexing | HTTP2 headers that should not update the dynamic header table with incremental indexing. |
| IfModifiedSince | A date determining the maximum age of the desired document. |
| KeepAlive | Determines whether the HTTP connection is closed after completion of the request. |
| LogLevel | The level of detail that is logged. |
| MaxHeaders | Instructs component to save the amount of headers specified that are returned by the server after a Header event has been fired. |
| MaxHTTPCookies | Instructs component to save the amount of cookies specified that are returned by the server when a SetCookie event is fired. |
| MaxRedirectAttempts | Limits the number of redirects that are followed in a request. |
| NegotiatedHTTPVersion | The negotiated HTTP version. |
| OtherHeaders | Other headers as determined by the user (optional). |
| ProxyAuthorization | The authorization string to be sent to the proxy server. |
| ProxyAuthScheme | The authorization scheme to be used for the proxy. |
| ProxyPassword | A password if authentication is to be used for the proxy. |
| ProxyPort | Port for the proxy server (default 80). |
| ProxyServer | Name or IP address of a proxy server (optional). |
| ProxyUser | A user name if authentication is to be used for the proxy. |
| TransferredData | The contents of the last response from the server. |
| TransferredDataLimit | The maximum number of incoming bytes to be stored by the component. |
| TransferredHeaders | The full set of headers as received from the server. |
| UseChunkedEncoding | Enables or Disables HTTP chunked encoding for transfers. |
| ChunkSize | Specifies the chunk size in bytes when using chunked encoding. |
| UsePlatformHTTPClient | Whether or not to use the platform HTTP client. |
| UserAgent | Information about the user agent (browser). |
| KerberosSPN | The Service Principal Name for the Kerberos Domain Controller. |
| ConnectionTimeout | Sets a separate timeout value for establishing a connection. |
| FirewallAutoDetect | Tells the component whether or not to automatically detect and use firewall system settings, if available. |
| FirewallHost | Name or IP address of firewall (optional). |
| FirewallListener | If true, the component binds to a SOCKS firewall as a server (IPPort only). |
| FirewallPassword | Password to be used if authentication is to be used when connecting through the firewall. |
| FirewallPort | The TCP port for the FirewallHost;. |
| FirewallType | Determines the type of firewall to connect through. |
| FirewallUser | A user name if authentication is to be used connecting through a firewall. |
| KeepAliveTime | The inactivity time in milliseconds before a TCP keep-alive packet is sent. |
| KeepAliveInterval | The retry interval, in milliseconds, to be used when a TCP keep-alive packet is sent and no response is received. |
| Linger | When set to True, connections are terminated gracefully. |
| LingerTime | Time in seconds to have the connection linger. |
| LocalHost | The name of the local host through which connections are initiated or accepted. |
| LocalPort | The port in the local host where the component binds. |
| MaxLineLength | The maximum amount of data to accumulate when no EOL is found. |
| MaxTransferRate | The transfer rate limit in bytes per second. |
| ProxyExceptionsList | A semicolon separated list of hosts and IPs to bypass when using a proxy. |
| TCPKeepAlive | Determines whether or not the keep alive socket option is enabled. |
| UseIPv6 | Whether to use IPv6. |
| UseNTLMv2 | Whether to use NTLM V2. |
| CloseStreamAfterTransfer | If true, the component will close the upload or download stream after the transfer. |
| TcpNoDelay | Whether or not to delay when sending packets. |
| CACertFilePaths | The paths to CA certificate files when using Mono on Unix/Linux. |
| LogSSLPackets | Controls whether SSL packets are logged when using the internal security API. |
| ReuseSSLSession | Determines if the SSL session is reused. |
| SSLCipherStrength | The minimum cipher strength used for bulk encryption. |
| SSLEnabledProtocols | Used to enable/disable the supported security protocols. |
| SSLIncludeCertChain | Whether the entire certificate chain is included in the SSLServerAuthentication event. |
| SSLProvider | The name of the security provider to use. |
| SSLSecurityFlags | Flags that control certificate verification. |
| SSLCACerts | A newline separated list of CA certificate to use during SSL client authentication. |
| SSLEnabledCipherSuites | The cipher suite to be used in an SSL negotiation. |
| TLS12SignatureAlgorithms | Defines the allowed TLS 1.2 signature algorithms when UseInternalSecurityAPI is True. |
| TLS12SupportedGroups | The supported groups for ECC. |
| TLS13KeyShareGroups | The groups for which to pregenerate key shares. |
| TLS13SupportedGroups | The supported groups for (EC)DHE key exchange. |
| TLS13SignatureAlgorithms | The allowed certificate signature algorithms. |
| AbsoluteTimeout | Determines whether timeouts are inactivity timeouts or absolute timeouts. |
| FirewallData | Used to send extra data to the firewall. |
| InBufferSize | The size in bytes of the incoming queue of the socket. |
| OutBufferSize | The size in bytes of the outgoing queue of the socket. |
| ConnectionTimeout | Sets a separate timeout value for establishing a connection. |
| FirewallAutoDetect | Tells the component whether or not to automatically detect and use firewall system settings, if available. |
| FirewallHost | Name or IP address of firewall (optional). |
| FirewallListener | If true, the component binds to a SOCKS firewall as a server (IPPort only). |
| FirewallPassword | Password to be used if authentication is to be used when connecting through the firewall. |
| FirewallPort | The TCP port for the FirewallHost;. |
| FirewallType | Determines the type of firewall to connect through. |
| FirewallUser | A user name if authentication is to be used connecting through a firewall. |
| KeepAliveTime | The inactivity time in milliseconds before a TCP keep-alive packet is sent. |
| KeepAliveInterval | The retry interval, in milliseconds, to be used when a TCP keep-alive packet is sent and no response is received. |
| Linger | When set to True, connections are terminated gracefully. |
| LingerTime | Time in seconds to have the connection linger. |
| LocalHost | The name of the local host through which connections are initiated or accepted. |
| LocalPort | The port in the local host where the component binds. |
| MaxLineLength | The maximum amount of data to accumulate when no EOL is found. |
| MaxTransferRate | The transfer rate limit in bytes per second. |
| ProxyExceptionsList | A semicolon separated list of hosts and IPs to bypass when using a proxy. |
| TCPKeepAlive | Determines whether or not the keep alive socket option is enabled. |
| UseIPv6 | Whether to use IPv6. |
| UseNTLMv2 | Whether to use NTLM V2. |
| CloseStreamAfterTransfer | If true, the component will close the upload or download stream after the transfer. |
| TcpNoDelay | Whether or not to delay when sending packets. |
| CACertFilePaths | The paths to CA certificate files when using Mono on Unix/Linux. |
| LogSSLPackets | Controls whether SSL packets are logged when using the internal security API. |
| ReuseSSLSession | Determines if the SSL session is reused. |
| SSLCipherStrength | The minimum cipher strength used for bulk encryption. |
| SSLEnabledProtocols | Used to enable/disable the supported security protocols. |
| SSLIncludeCertChain | Whether the entire certificate chain is included in the SSLServerAuthentication event. |
| SSLProvider | The name of the security provider to use. |
| SSLSecurityFlags | Flags that control certificate verification. |
| SSLCACerts | A newline separated list of CA certificate to use during SSL client authentication. |
| SSLEnabledCipherSuites | The cipher suite to be used in an SSL negotiation. |
| TLS12SignatureAlgorithms | Defines the allowed TLS 1.2 signature algorithms when UseInternalSecurityAPI is True. |
| TLS12SupportedGroups | The supported groups for ECC. |
| TLS13KeyShareGroups | The groups for which to pregenerate key shares. |
| TLS13SupportedGroups | The supported groups for (EC)DHE key exchange. |
| TLS13SignatureAlgorithms | The allowed certificate signature algorithms. |
| AbsoluteTimeout | Determines whether timeouts are inactivity timeouts or absolute timeouts. |
| FirewallData | Used to send extra data to the firewall. |
| InBufferSize | The size in bytes of the incoming queue of the socket. |
| OutBufferSize | The size in bytes of the outgoing queue of the socket. |
| GUIAvailable | Tells the component whether or not a message loop is available for processing events. |
| UseBackgroundThread | Whether threads created by the component are background threads. |
| UseInternalSecurityAPI | Tells the component whether or not to use the system security libraries or an internal implementation. |