February 2002
Intermediate to advanced
960 pages
25h 37m
English
Content preview from Programming ASP .NETBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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Chapter 17. Consuming Web Services
While Chapter 15 gave an overview of web services and Chapter 16 described in detail how to create a web service, this chapter will explain how to create a web service client application or web service consumer. The consuming application can be a web page, another web service, or a desktop application.
Once a web service is created and made available to consumers on the Internet, it is up to the developer creating the client application to find the web service, create the client proxy, and incorporate the proxy into the client. The client can then make method calls against the remote web service as though it were making local calls. In fact, the client application is making local method calls against the proxy -- it just behaves as if it is making calls directly to the web service over the Internet.
Discovery
Discovery is the process of finding out what web services are available, what methods and properties are exposed by a specific web service, what parameters those methods and properties expect to receive, and what data type the web method returns. All of this information is contained in the WSDL (Web Services Description Language) document, introduced in the preceding chapter.
Discovery is an optional process. If the consuming developer knows the URL of the web service file (.asmx) itself, then there is no need to do discovery. However, it will often be the case that the consuming developer will not know the location of the web service file ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.