如何在创建Spring的RestTemplate时设置标题？

Question

We can set a header to rest template while firing the call ie restTemplate.exchange(postUrl, HttpMethod.GET, entity, String.class);
where entity contains headers.

But for my requirement I want to set cookie header while creating the restTemplate itself and not while firing the actual call. I don't want to repeat the code of creating HttpEntity and setting headers to it.

Is there a way to set headers while creating restTemplate?

Answer 1

Looks like you can inject your own HttpMessageConverter implementation which accepts all requests - canWrite returns true . And add desired headers within write method to the HttpOutputMessage.getHeaders() .

I remember as I overrided once ClientHttpRequestFactory.createRequest to do something similar for other server-specific static header.

UPDATE

From the code of RestTemplate.doWithRequest you can see if there is no request.body then it reads headers from the request entity .

In that case you can simply extend RestTemplate and return from the overridden httpEntityCallback your own RequestCallback .