matlab.net.http.field.ContentTypeField Class

Namespace: matlab.net.http.field
Superclasses: matlab.net.http.HeaderField, matlab.net.http.field.MediaRangeField

HTTP Content-Type header field

Description

A ContentTypeField object is an HTTP header field in a request or response message. The field contains a single media type specification indicating the type of content in the body of the message. For more information, see RFC 7231 Semantics and Content, section 3.1.1.5. Content-Type on the RFC Editor website.

In a request message, a Content-Type field determines how data specified in the MessageBody.Data property is converted. For information on this conversion, see HTTP Data Type Conversion. If a request message contains a nonempty body, but does not contain a Content-Type field, then MATLAB^® creates a Content-Type field based on the data type.

Class Attributes

Sealed

true

For information on class attributes, see Class Attributes.

Creation

Description

obj = matlab.net.http.field.ContentTypeField(value) creates a Content-Type header field with the Value property set to value.

Properties

Name — Header field name

'Content-Type'

Header field name, specified as 'Content-Type'.

Attributes:

GetAccess	public
SetAccess	public
Dependent	true

Value — Media type

matlab.net.http.MediaType object | string

Media type, specified as a matlab.net.http.MediaType object or a string acceptable to the MediaType constructor. Value cannot contain a quality ('q') parameter.

Example: 'text/html;charset=utf-8'

Attributes:

GetAccess	public
SetAccess	public

Methods

Public Methods

addFields	Add fields to HeaderField array
removeFields	Remove fields from header field array
changeFields	Change existing values in HeaderField array
replaceFields	Change values in or add fields to array of HeaderFields
getFields	Return header fields matching name or class
eq	Compare two HeaderField arrays
convertLike	Convert header field value like another header field
parse	Parse header field value and return as strings
displaySubclasses	Display supported HeaderField subclasses

Specialized for Subclass

convert

Parse ContentTypeField as a comma-separated list of values and converts each Value property to a MediaType object. Each value is a media-type expression as defined in RFC 7231 Media Type, section 3.1.1.1 on the RFC Editor website.

Specialized Operators and Functions

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

isequal	true if two header field arrays are the same size and corresponding elements are equal, as described by eq method.
string	Array of header fields as string, as it appears in a message. Insert newline characters between fields but not at the end of all fields.
char	Array of header fields as character vector, as described by string method.

Examples

Display Media Type for Message Body

This example shows how to read the Content-Type field in a message.

import matlab.net.*;
import matlab.net.http.*;

httpsUrl = 'https://requestserver.mathworks.com';
uri = URI(strcat(httpsUrl, '/assets/computerVision.jpg'));
req = RequestMessage('GET');
response = req.send(uri);
contentTypeField = response.getFields("Content-Type");
disp(contentTypeField)

  ContentTypeField with properties:

     Name: "Content-Type"
    Value: "image/jpeg"

Version History

Introduced in R2016b