Add JSONP support to MappingJackson2MessageConverter [SPR-9899]

[spring-projects-issues]

Johan Sjöberg opened SPR-9899 and commented

To implement a JSONP (padded json) HttpMessageConverter a parameter from the Servlet request map is necessary (e.g., ?callback=foo) which affects the produced JSON output.

E.g., if a regular JSON response is {json}, then JSONP for value foo is

foo({json});

One option would be the add the HttpServletRequest or similar to:

HttpMesageConverter.write(T t, MediaType contentType, HttpOutputMessage outputMessage)

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Affects: 4.0.5

Issue Links:

• Provide better intercepting model for controllers returning @ResponseBody [SPR-10859] #15486 Provide better intercepting model for controllers returning @ResponseBody ("depends on")

[spring-projects-issues]

Rossen Stoyanchev commented

Modified title (was "Add Request parameter to HttpMessageConverter.write(..)") to reflect how we'll actually address the underlying requirement for JSONP formatting. The enabler for this is #15486.

[spring-projects-issues]

Rossen Stoyanchev commented

See commit 1338d4 and also this example test with JSONP advice.