WebReceive (XmlDoc function)

Deserialize Web request into this XmlDoc (XmlDoc class)

[Requires Janus SOAP]

WebReceive converts an HTTP request received on a Janus Web Server thread from the text representation of an XML document to an XmlDoc tree (this process is called deserialization, because the text representation of a document is called the serial form). It returns a zero value if the deserialization is successful or a non-zero value if unsuccessful and the ErrRet option is used and the particular error is tolerated.

Syntax

[%errorPosition =] doc:WebReceive[( [formFieldname], [fieldOccurrence], - [options])] Throws XmlParseError

Syntax terms

%errorPosition	A %variable set to 0 if the deserialization is successful, or, if the ErrRet option is used, to the position within the uploaded data at which an error is found.
doc	An expression that points to the XmlDoc to contain the deserialized representation of the XML document.
formFieldName	The name of the form field associated with the "<input type=file>" tag in the HTML form, that is, the value of the "name" parameter in that tag. See the fieldname argument of $Web_Proc_Recv.
fieldOccurrence	The number of the form field associated with the "<input type=file>" tag in the HTML form. See the occurrence argument of $Web_Proc_Recv.
options	See the options argument of LoadXml.

Exceptions

This function can throw the following exception:

XmlParseError

If the method encounters a parsing error, properties of the XMLParseError exception object may indicate the location and type of problem.

Usage notes

• See the LoadXml function.

Examples

The following Janus Web Server program uses WebReceive to obtain the XML document from the HTTP request:

begin %d object xmlDoc %d = new %d:webReceive %d2 object xmlDoc %d2 = new %d2:loadXml('<sum>' With - %d:value('/*/*[1]') + %d:value('/*/*[2]') with '</sum>') %d2:webSend end

Request-cancellation errors

This list is not exhaustive: it does not include all the errors that are request cancelling.

• The doc object is not EMPTY.
• An options argument is invalid.
• Insufficient free space exists in CCATEMP.
• A syntax error occurred in the text string representation of the XML document (these are tolerated if the ErrRet option is specified).

See also

• To deserialize a string, use LoadXml.
• The subroutine that serializes an XmlDoc and sends it as a Web response is WebSend.

XmlDoc class XmlNode class XmlNodelist class	List of XmlDoc methods List of XmlNode methods List of XmlNodelist methods List of XmlDoc API methods	XmlDoc methods syntax XmlNode methods syntax XmlNodelist methods syntax
Notation conventions for methods