How To Get Attribute From Web Service Response

Extract REST Request Attributes

Overview

This filter extracts the values of query string parameters and/or HTTP headers from a REST request and stores them in separate message attributes. The Balance request can be an HTTP Get or POST request. This filter is found in the Attributes category in the Policy Studio. For details on how to create a REST asking, see the Create Residue Request filter.

Instance REST Request

The following instance shows an incoming Residue asking with query string and HTTP headers:

POST /services?proper name=Niall&location=Dublin&location=Pembroke%20St HTTP/1.i Host: mail.google.com User-Agent: Mozilla/v.0 (Windows; U; Windows NT vi.one; en-GB; rv:one.9.2.15)  Gecko/20110303 Firefox/3.6.15 Accept: text/html,application/xhtml+xml,application/xml;q=0.nine,*/*;q=0.8 Take-Language: en-gb,en;q=0.v Accept-Encoding: gzip,deflate Accept-Charset: ISO-8859-1,utf-viii;q=0.7,*;q=0.7

Using this example, the Extract REST Request Attributes filter generates and populates the post-obit attributes:

http.header.Host = mail.google.com http.header.User-Agent = Mozilla/5.0 (Windows; U; Windows NT 6.one; en-GB; rv:1.9.two.15)  Gecko/20110303 Firefox/three.vi.15 http.header.Accept = text/html,application/xhtml+xml,awarding/xml;q=0.nine,*/*;q=0.viii http.header.Have-Language = en-gb,en;q=0.5 http.header.Accept-Encoding = gzip,deflate http.header.Accept-Charset = ISO-8859-1,utf-viii;q=0.7,*;q=0.7  http.querystring.name = Niall http.querystring.location.1 = Dublin http.querystring.location.two = Pembroke St

	Annotation
	For multi-valued query string parameters (for case, `location`), each value is given an incremental index. For example, the multi-valued `location` parameter results in the creation of the `http.querystring.location.i` and `http.querystring.location.2` message attributes.

The purpose of this filter is to excerpt all parameters from an incoming REST request and shop them in carve up message attributes so that they tin be validated hands, without needing to iterate through the ready of http.headers.

Configuration

Configure the following fields on the Excerpt Balance Request Attributes screen:

Name:

Enter an appropriate name for this filter.

Asking Querystring:

Select whether to excerpt the values of query string parameters from an HTTP POST or GET request. These are elementary name-value pairs (for example, Proper noun=Joe Bloggs). This setting is selected by default.

HTTP Headers:

Select whether to extract the values of HTTP headers from an HTTP Mail service or Get asking. This is selected by default.