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Figure 1-7 shows only a single handler, which processes the calculator operations. Unlike Figure 1-5, an infinite number of URLs can be used to add two numbers. The numeric identifier is an arbitrary value used to reference a past calculation. Thus, a memory operation is not necessary because to reference a past calculation, you only need to reference the URL. If a calculation is to be shared among multiple users, then it is only necessary to bookmark the URL. When writing your own REST application, remember the following points: REST is about managing data, and SOAP is about managing APIs. REST has dynamic contracts that is, the resources are connected and described using links and the HTTP headers of the client. For example, one client can define the contract to be XML data, and another can define the contract to be HTML data. The server adapts to each by sending an appropriate representation for a resource. REST has a set of predefined semantics using HTTP GET, HTTP POST, URLs, resources, and representations. SOAP doesn t have a predefined set of semantics or contracts, as they re defined by the metadata (WSDL). REST manages URLs in a dynamic manner, where URLs are created dynamically. URLs in a REST approach represent references to a resource and not necessarily a file on a hard disk.

Maybe sometimes only the username is specified, other times an age, and sometimes both a username and age It is even possible in the URL to add a request for a specific formatting of the data (for example, format=xml) This is useful when the returned data should be in one format even though the client requesting the data usually gets another format When defining a resource URL, it is important to consider what the URL is being used for Is it being used to represent a user (for example, http://mydomaincom/user) Is it used to represent information (for example, http://mydomaincom/news/column/jack) Is the information created.

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The following code shows how to access the PortalContext object and use it to create a new QueryProvider object when a web part loads: protected override void OnLoad(SystemEventArgs e) { PortalContext context = PortalApplicationGetContext(); QueryProvider query = new QueryProvider(contextSearchApplicationName); } Once the QueryProvider object is created, you may use it to execute a full-text query against the search service Executing the query is a straightforward process of building a search string and calling the Execute method This method runs the query and returns a DataSet object, which you can use to display the results Once again, the challenge is to correctly create the full-text query.

in a time-dependent fashion (for example, http://mydomain.com/news/column/jack/current for current news and http://mydomain.com/news/column/jack/2005-10-10 for an archived news item) You must remember that the URL represents a resource that the HTTP server is responsible for converting into a representation. The client is not responsible for knowing what technologies or files are stored on the server side, because that is a complete dependency of the HTTP server.

When developing an Ajax and REST application, you must decide on the tools and frameworks you ll use. The choice is simple: Use whatever you re using today, and write some Ajax applications. You don t need to change the tools you re using today. Whether you re using ASP .NET, JavaServer Pages (JSP), PHP Ruby, or Python, you can continue with those tools. , Ajax uses JavaScript, DHTML, and the XMLHttpRequest object, but ASP .NET, PHP and simi, lar technologies don t hinder you from writing HTML pages that make use of Ajax techniques. If your technology does hinder you from writing Ajax applications, then you should think hard about continuing using the technology. After all, you re reading an Ajax and REST recipe book, so I assume that you plan on implementing Ajax and REST solutions. Next, you want to decouple the client from the server, as illustrated in Figure 1-8.

Later in this chapter I ll show you how you can create and copy queries using SPS and a custom web part, but for now I ve provided a complete function in Listing 4-1 that returns a query string based on a keyword Listing 4-1 Creating a Full-Text Query private string buildQuery(string keyword) { //Create query string from keywords string queryText = "SELECT" + "\"DAV:href\"," + "\"DAV:displayname\"," +.

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