WebReceive (XmlDoc function)
Deserialize Web request into this XmlDoc (XmlDoc class)
[Requires Janus SOAP]
This callable function 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
| %pos | 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. |
| fldNam | 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 in the &JANWEBR.. |
| fldOcc | 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 in the &JANWEBR.. |
| 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 exception object may indicate the location and type of problem. See ?? refid=xmlpars..
Usage notes
- See the LoadXml function ?? reftxt='Usage Notes' refid=unlxml..
Example
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
- XmlDoc is not EMPTY.
- Option 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).