Add support for content negotiation based on a request parameter value [SPR-5870]

[spring-projects-issues]

Rostislav Hristov opened SPR-5870 and commented

Content negotiation based on a request parameter can be a nice addition to the framework. Such a capability is already available in Grails (http://grails.org/doc/1.0.x/guide/single.html#6.8%20Content%20Negotiation). I was able to implement it and use it by extending the ContentNegotiatingViewResolver but it will be great if it can become a part of the framework.

Such a feature is required in a scenario where you have an HTML FORM which allows you to select the format you want to receive after submitting it. The only way to implement such a form unobtrusively (without JavaScript) is to use a SELECT dropdown defining the requested media extension. Without JavaScript you cannot change the FORM action address or the request header. Even with JavaScript support it's much more easier to use a request parameter than any other implementation.

As a result of this improvement the content negotiation will be available in the following scenarious:
/book/list.xml
/book/list?format=xml
/book/list (with proper Accept header)

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Affects: 3.0 M3

Attachments:

• ContentNegotiatingViewResolver.java.patch (6.18 kB)

1 votes, 1 watchers

[spring-projects-issues]

Rostislav Hristov commented

The following patch enhances the ContentNegotiatingViewResolver class by adding an implementation and documentation of the described feature. It introduces two configurable properties named "favorParameter" and "parameterName" which should allow customization of the feature.

[spring-projects-issues]

Arjen Poutsma commented

Done. Thanks for the patch!