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I need to build a GWT application that will be called by an external application with specific URL parameters.
For example:
http://www.somehost.com/com.app.client.Order.html?orderId=99999.
How do I capture the orderId parameter inside the GWT application?
495
GET parameters (also called URL parameters or query strings) are used when a client, such as a browser, requests a particular resource from a web server using the HTTP protocol. These parameters are usually name-value pairs, separated by an equals sign = . They can be used for a variety of things, as explained below.
Any word after the question mark (?) in a URL is considered to be a parameter which can hold values. The value for the corresponding parameter is given after the symbol "equals" (=). Multiple parameters can be passed through the URL by separating them with multiple "&". Read more about passing parameter through URL.
GET requests don't have a request body, so all parameters must appear in the URL or in a header. While the HTTP standard doesn't define a limit for how long URLs or headers can be, mostHTTP clients and servers have a practical limit somewhere between 2 kB and 8 kB.
Yes, that's what you should be doing. encodeURIComponent is the correct way to encode a text value for putting in part of a query string. but when it is decoded at the server, the parameters of url are interpreted as seperate parameters and not as part of the single url parameter.
Try,
String value = com.google.gwt.user.client.Window.Location.getParameter("orderId"); // parse the value to int P.S. GWT can invoke native javascript which means if javascript can do the stuff, GWT can do it too; e.g. in GWT, you can write
public static native void alert(String msg) /*-{ $wnd.alert("Hey I am javascript"); }-*/; In this case, you can even use existing javascript lib to extract param's value in the querystring.
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