Class Request
- java.lang.Object
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- org.apache.wicket.request.Request
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- Direct Known Subclasses:
WebRequest
public abstract class Request extends Object
Request object.- Author:
- Matej Knopp
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Constructor Summary
Constructors Constructor Description Request()
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Method Summary
All Methods Instance Methods Abstract Methods Concrete Methods Modifier and Type Method Description Request
cloneWithUrl(Url url)
Returns request with specified URL and same POST parameters as this request.abstract Charset
getCharset()
Gets charset of the requestabstract Url
getClientUrl()
Returns the url against which the client, usually the browser, will resolve relative urls in the rendered markup.abstract Object
getContainerRequest()
Provides access to the low-level container request object that implementaion of thisRequest
delegate to.String
getContextPath()
Returns the context path or an empty string if the application is running under root context.String
getFilterPath()
Returns the path to which wicket Filter is mapped or an empty string if the filter is mapped to/*
.abstract Locale
getLocale()
Returns locale for this request.Url
getOriginalUrl()
In case this request has been created usingcloneWithUrl(Url)
, this method should return the original URL.IRequestParameters
getPostParameters()
String
getPrefixToContextPath()
Returns prefix from Wicket Filter mapping to context path.IRequestParameters
getQueryParameters()
IRequestParameters
getRequestParameters()
abstract Url
getUrl()
Returns the URL for this request.
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Constructor Detail
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Request
public Request()
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Method Detail
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getUrl
public abstract Url getUrl()
Returns the URL for this request. URL is relative to Wicket filter path.- Returns:
- Url instance
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getClientUrl
public abstract Url getClientUrl()
Returns the url against which the client, usually the browser, will resolve relative urls in the rendered markup. If the client is a browser this is the url in the browser's address bar.Under normal circumstances the client and request (
getUrl()
) urls are the same. Handling an Ajax request, however, is a good example of when they may be different. Technologies such as XHR are free to request whatever url they wish without modifying the client url; however, any produced urls will be evaluated by the client against the client url - not against the request url.Lets take a simple example:
Suppose we are on a client detail page. This page contains an Ajax link which opens a list of client's orders. Each order has a link that goes to the order detail page. The client detail page is located at/detail/customer/15
and the order detail page is located at/order/22
The Ajax link which renders the detail section is located at/detail/wicket?page 3
Lets run through the execution and see what happens when the XHR request is processed:request 1: /details/customer/15 client url: details/customer/15 (the url in the browser's address bar) request url: details/customer/15 Wicket renders relative Ajax details anchor as ../../wicket/page?3 ../../wicket/page?3 resolved against current client url details/customer/15 yields: request 2: /wicket/page?3 client url: customer/15 (unchanged since XHRs requests dont change it) request url: wicket/ajax/page?3 now Wicket has to render a relative url to /details/order/22. If Wicket renders it against the request url it will be: ../order/22, and later evaluated on the client will result in /customer/order/22 which is incorrect.
This is why implementations ofRequest
must track the client url, so that relative urls can be rendered against the same url they will be evaluated against on the client - which is not always the same as the request url. For example, Wicket's Ajax implementation always sends the current client url in a header along with the XHR request so that Wicket can correctly render relative urls against it.- Returns:
- client url
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getOriginalUrl
public Url getOriginalUrl()
In case this request has been created usingcloneWithUrl(Url)
, this method should return the original URL.- Returns:
- original URL
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getPostParameters
public IRequestParameters getPostParameters()
- Returns:
- POST request parameters for this request.
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getQueryParameters
public IRequestParameters getQueryParameters()
- Returns:
- GET request parameters for this request.
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getRequestParameters
public IRequestParameters getRequestParameters()
- Returns:
- all request parameters for this request (both POST and GET parameters)
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cloneWithUrl
public Request cloneWithUrl(Url url)
Returns request with specified URL and same POST parameters as this request.- Parameters:
url
- Url instance- Returns:
- request with specified URL.
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getPrefixToContextPath
public String getPrefixToContextPath()
Returns prefix from Wicket Filter mapping to context path. This method does not take the actual URL into account.For example if Wicket filter is mapped to hello/* this method should return ../ regardless of actual URL (after Wicket filter)
- Returns:
- prefix to context path for this request.
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getContextPath
public String getContextPath()
Returns the context path or an empty string if the application is running under root context. Returned path, unless an empty string, will always start with a slash and will never end with a slash.- Returns:
- context path
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getFilterPath
public String getFilterPath()
Returns the path to which wicket Filter is mapped or an empty string if the filter is mapped to/*
. Returned path, unless an empty string, will always start with a slash and will never end with a slash.- Returns:
- filter path
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getCharset
public abstract Charset getCharset()
Gets charset of the request- Returns:
- request charset
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getContainerRequest
public abstract Object getContainerRequest()
Provides access to the low-level container request object that implementaion of thisRequest
delegate to. This allows users to access features provided by the container requests but not by generalized WicketRequest
objects.- Returns:
- low-level container request object, or
null
if none
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