matlab.net.http.Message Class

Namespace: matlab.net.http

HTTP request or response message

Description

The Message class is an abstract class used as a base class to create HTTP messages.

Properties

StartLine — First line of message

matlab.net.http.StartLine object

First line of message, specified as a matlab.net.http.StartLine object, if any.

Attributes:

GetAccess	public
SetAccess	public

Header — Message header

[] (default) | matlab.net.http.HeaderField object

Message header, specified as a matlab.net.http.HeaderField object or a vector of HeaderField objects. When you set the Header property, MATLAB^® checks the fields of the header to ensure that they are appropriate for the message type. The RequestMessage send and complete methods fill in any required header fields for a properly formed request.

Attributes:

GetAccess	public
SetAccess	public

Body — Message body

[] (default) | matlab.net.http.MessageBody object | matlab.net.http.io.ContentProvider

Message body, specified as a matlab.net.http.MessageBody object, matlab.net.http.io.ContentProvider, or data acceptable to the MessageBody constructor. By default, Body is empty (set to []). A request message containing a Body property must use a method such as 'PUT' or 'POST', not the default value 'GET'.

In a completed or received message, if the message has a ContentTypeField header field, then the MessageBody.ContentType property is set to that value. Otherwise, ContentType is unchanged or empty.

Attributes:

GetAccess	public
SetAccess	public

Completed — Whether message is complete

false (default) | true

Whether message is complete, specified as true or false. A true value means that the message is complete.

RequestMessage methods that validate messages (send and complete) set the Completed property to true when:

• The message is valid.

• The processing is complete. For example, required header fields are added and the data is converted.

If the property is true, then these methods do not modify the message, and the send method sends the message without checking it for validity. Any later changes to this message change the value of Completed back to false.

Methods that return messages set Completed to true when:

• The Body or Body.Data properties are empty.

• The Body.Payload property contains the raw data.

If a request message contains data (Body.Data is not empty), then the property is true only if Body.Payload contains the raw data.

In a response message, the payload is set only if you set the HTTPOptions.SavePayload property to true.

Attributes:

GetAccess	public
SetAccess	public
Transient	true

Data Types: logical

Methods

Public Methods

addFields	Add fields to message header
changeFields	Change existing fields in message header
getFields	Return message header fields matching name or class
removeFields	Remove fields from message header
replaceFields	Change values in or add fields to message header
show	Display or return formatted version of message

Specialized Operators and Functions

These methods specialize standard MATLAB operators and functions for objects in this class.

string	Message Header, Body and StartLine properties, as string. For multiple messages, returns a string array. If Body contains binary data that cannot be converted to characters, then the method displays a message indicating the length of the data in bytes. The string is an approximate representation of what the message looks like when sent or received. Use for logging, diagnostics, or debugging. For a formatted version of messages, use show.
char	Same as string, except returns message as character vector.
isequal	Returns true if the visible public properties of all messages in the two message arrays are equal.

Tips

• To send arbitrary headers and data in a request message, set the Completed property to true to prevent the send method from modifying the message. You still can use the complete method to validate the message, but the send method does not validate the message.

Version History

Introduced in R2016b