使用Restlet设置自定义内容范围标题 [英] Setting a custom Content-Range Header using Restlet
问题描述
我正在使用restlet 2.0.11通过REST-Web-Interface为基于Dojo的Web应用程序提供数据.
I'm using restlet 2.0.11 to provide data for a Dojo-based web application via a REST-Web-Interface.
根据dojo的文档，使用HTTP的"content-range"标头实现分页，因此dojo希望使用这样的标头:
According to the documentation of dojo, pagination is realized using the "content-range" header of HTTP, thus dojo expects a header like:
Content-Range: items 0-19/100
(来源: http://dojotoolkit.org/reference-guide/1.7/dojox/data/JsonRestStore.html )
这意味着REST-Api提供了100个项目中的前20个.
Which means that the REST-Api provides the first 20 of 100 total items.
像这样手动设置Content-Range标头
Setting the Content-Range header manually like this
getResponse().getAttributes().get("org.restlet.http.headers").add(new Parameter("Content-Range", "FooBar")
导致以下错误:
WARNING: Addition of the standard header "Content-Range" is not allowed. Please use the equivalent property in the Restlet API.
根据restlet的文档，该属性为"message.entity.range"(来源: http://wiki.restlet.org/docs_2.0/130-restlet.html )
According to restlet's documentation the property is "message.entity.range" (Source: http://wiki.restlet.org/docs_2.0/130-restlet.html)
直接修改此哈希图也没有成功:
The direct modification of this hash-map was also without success:
getResponse().getAttributes().put("message.entity.range", "FooBat");
似乎有希望的另一种方法是使用restlet的"Representation"对象，因为它具有setRange()方法，但是在请求期间，对象引用为null:
Another way which seemed to be promising is using the "Representation"-object of restlet, since it has a setRange() method, but during request time, the object reference is null:
getResponse().getEntity()
所以我的问题是:如何为Restlet响应设置Content-Range标头?
So my question is: How to set a Content-Range header to a Restlet response?
推荐答案
您必须在Representation类中使用等效的Java属性，因此它是getResponse().getEntity().setRange(myRange).
You have to use the equivalent Java properties in the Representation class, so this is getResponse().getEntity().setRange(myRange).
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