[SOLVED] Jersey REST: Importing headers from a Map into a WebResource instance

Jersey REST: Importing headers from a Map into a WebResource instance

I am trying to take in an arbitrary set of HTTP headers and dump it into a WebResource instance. The WebResource interface allows one to do this with query parameters as it offers both a

        webResource.queryParam(key, value)

and

        webResource.queryParams(MultivaluedMap<String, String> queryMap)

The API however, does not allow the same to be done to headers. There is only one function,

            webResource.header(key, value)

which allows one to enter a key-value pair for an HTTP header, but no function

 webResource.headers(MultivaluedMap<String, String> headersMap)

To solve the problem, I tried to retrieve the builder from WebResource and iterate over it, adding the headers one by one

        WebResource.Builder builder = webResource.getRequestBuilder();
    for(Map.Entry<String, String> headersMapEntry : headersMap.entrySet()){
        builder = builder.header(
                       headersMapEntry.getKey(), headersMapEntry.getValue());
    }

but it doesn't seem to solve my problem.

Does anyone have an idea how I can do a workaround with Jersey so that I can dump an arbitrary map into the headers of my WebResource?

Thanks, David

Solution

It turned out that the only way around it is to first extract the requestBuilder from the webResource using getRequestBuilder(), and then using requestBuilder to build and execute the rest of the request.