IP*Works! rest Component : rest OCX, rest .NET Component, rest Class, rest Bean, rest Object

Available in: IP*WORKS!

Rest Class

REST Component [IP*Works! V8]

Properties Methods Events Configuration Settings

The REST component can be used to retrieve xml documents from the World Wide Web.

NOTE: What follows is a very short description of the component interfaces. For more information, please consult the help files that come with the respective package.

Remarks

The REST component implements a standard REST client .

The component contains a number of properties that map directly to HTTP request headers. All xml data received is parsed by the component and provided to the user through properties such as XPath, XElement, XText, etc. which allow traversal of the document structure. The Header event will provide the HTTP headers as returned by the server.

To receive an XML document, call the Get method with the URL to retrieve specified in the URL parameter. Call the Delete method to delete a resource specified by the URL parameter.

The other two REST operations are for creating and updating resources. Some people wish to use the Post method for creating resources and the Put method for updating resources. However, others choose to use the methods vice versa, or just one for both operations. So, you can POST XML data to the HTTP server by assigning it to the PostData property and then calling the Post method. Alternatively, you may use the PUT method instead. You should specify the User and Password properties or alternatively the Authorization and call the Put method with the specified URL.

The REST component supports the HTTP Basic authentication scheme through the User and Password properties. Other authentication schemes can be implemented by using the AuthScheme property.

Property List

The following is the full list of the properties of the component with short descriptions. Click on the links for complete descriptions.


Accept	A list of acceptable MIME types for the request.
AuthScheme	The authorization scheme to be used when server authorization is to be performed.
BuildDOM	When True, an internal object model of the XML document is created.
Connected	Shows whether the component is connected.
ContentType	Content type for posted data.
Cookies	Collection of cookies.
Firewall	A set of properties related to firewall access.
FollowRedirects	Determines what happens when the server issues a redirect.
From	The email address of the HTTP agent (optional).
HTTPMethod	The HTTP method used for the request.
Idle	The current status of the component.
IfModifiedSince	A date determining the maximum age of the desired document.
LocalFile	The path to a local file for downloading. If the file exists, it is overwritten. (optional)
LocalHost	The name of the local host or user-assigned IP interface through which connections are initiated or accepted.
Namespaces	A collection of namespaces in the current stack.
OtherHeaders	Other headers as determined by the user (optional).
ParsedHeaders	Collection of headers returned from the last retrieval.
Password	A password if authentication is to be used.
PostData	The data to post with the URL if the POST method is used.
Proxy	A set of properties related to proxy access.
Referer	Referer URL/document (optional).
StatusLine	The first line of the last server response.
Timeout	A timeout for the component.
TransferredData	The contents of the last transfer.
TransferredDataLimit	The maximum of data to be transferred.
TransferredHeaders	The full set of headers as received from the server.
URL	The URL to post information to.
User	A user name if authentication is to be used.
Validate	When True, the parser checks that the document consists of well-formed XML.
XAttributes	A collection of attributes of the current element.
XChildren	Collection of child elements of the current element.
XElement	The name of the current element.
XErrorPath	An XPath to check in the server response for errors.
XNamespace	The namespace of the current element.
XParent	The parent of the current element.
XPath	Provides a way to point to a specific element in the document.
XPrefix	The prefix of the current element.
XSubTree	A snapshot of the current element in the document.
XText	The text of the current element.

Method List

The following is the full list of the methods of the component with short descriptions. Click on the links for complete descriptions.


AddCookie	Sets a cookie and the corresponding value.
Attr	Returns the value of the specified attribute.
Config	Sets or retrieves a component configuration setting.
Delete	Deletes an object on the server.
DoEvents	Processes events from the internal message queue.
Get	Fetch the document using the HTTP GET method.
Interrupt	Interrupt the current method.
Post	Posts data to the HTTP server using the HTTP POST method.
Put	Sends data to the HTTP server using the HTTP PUT method.
Reset	Reset the component

Event List

The following is the full list of the events fired by the component with short descriptions. Click on the links for complete descriptions.


Characters	Fired for plain text segments of the input stream.
Comment	Fired when a comment section is encountered.
Connected	Fired immediately after a connection completes (or fails).
ConnectionStatus	Fired to indicate changes in connection state.
Disconnected	Fired when a connection is closed.
EndElement	Fired when an end-element tag is encountered.
EndPrefixMapping	Fired when leaving the scope of a namespace declaration.
Error	Information about errors during data delivery.
EvalEntity	Fired every time an entity needs to be evaluated.
Header	Fired every time a header line comes in.
IgnorableWhitespace	Fired when a section of ignorable whitespace is encountered.
Meta	Fired when a meta section is encountered.
PI	Fired when a processing instruction section is encountered.
Redirect	Fired when a redirection is received from the server.
SetCookie	Fired for every cookie set by the server.
SpecialSection	Fired when a special section is encountered.
StartElement	Fired when a begin-element tag is encountered in the document.
StartPrefixMapping	Fired when entering the scope of a namespace declaration.
Status	Fired when the HTTP status line is received from the server.

Configuration Settings

The following is a list of configuration settings for the component with short descriptions. Click on the links for complete descriptions.


AbsoluteTimeout	Determines whether timeouts are inactivity timeouts or absolute timeouts.
AcceptEncoding	Used to tell the server which types of content encodings the client supports.
AllowHTTPCompression	This property enables HTTP compression for receiving data.
Authorization	The Authorization string to be sent to the server.
CacheContent	If true, the original XML is saved in a buffer
CloseStreamAfterTransfer	If true, the component will close the upload or download stream after the transfer.
CodePage	The system code page used for Unicode to Multibyte translations (Windows/COM only).
FirewallData	Used to send extra data to the firewall.
FirewallListener	If true, the component binds to a SOCKS firewall as a server (IPPort only).
From	Allows the specification of the email address of the HTTP agent.
HTTPVersion	The version of HTTP used by the component
IfModifiedSince	A date determining the maximum age of the desired document.
InBufferSize	The size in bytes of the incoming queue of the socket.
KeepAlive	Determines whether the HTTP connection is closed after the completion of the request.
MaxHTTPCookies	Instructs component to save the amount of cookies specified that are returned by the server when a SetCookie event is fired.
MaxHeaders	Instructs component to save the amount of headers specified that are returned by the server after a Header event has been fired.
MaxLineLength	The maximum amount of data to accumulate when no EOL is found.
OutBufferSize	The size in bytes of the outgoing queue of the socket.
ProxyAuthScheme	The authorization scheme to be used for the proxy.
ProxyAuthorization	The authorization string to be sent to the proxy server.
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.
SocketHandle	The handle of the main socket used by the component.
TcpNoDelay	Whether or not to delay when sending packets
TransferredDataLimit	The maximum number of incoming bytes to be stored by the component.
UserAgent	Information about the user agent (browser).
WinsockInfo	Identifying information about the loaded Winsock stack (Windows only)
WinsockLoaded	Loads and unloads Winsock on demand (Windows only)
WinsockMaxDatagramSize	Size in bytes of the largest UDP datagram that can be sent or received (Windows only)
WinsockMaxSockets	Maximum number of sockets available to a single process (Windows only)
WinsockPath	The path to the Winsock DLL used (Windows only)
WinsockStatus	The status of the Winsock stack (Windows only)