CODEWITHSUNDEEP
javaspringservletsproxyhttpresponse
Popcorn
Popcorn

Reputation: 5348

How can I return Apache's HttpResponse within Spring's HttpServletResponse?

I have an endpoint using Spring:

@RequestMapping(value = {"/hello"}, method = RequestMethod.GET)
@ResponseBody
public String getContent(@RequestParam(value = "url", required = true) String url)

I would like this to return the exact same response I would get if I send a GET to url. I'm using the Apache library to do my GET, which returns me a CloseableHttpResponse. How do I return this response as my endpoint's response? My current code copies this response, which is not what I want. I would directly like to return the CloseableHttpResponse. The reason I want to do this is because some websites have really huge data, and I would like to avoid having to copy those in place.

@RequestMapping(value = {"/hello"}, method = RequestMethod.GET)
@ResponseBody
public String getContent(@RequestParam(value = "url", required = true) String url, HttpServletResponse response)
     CloseableHttpResponse httpResponse = useApacheLibraryAndSendGetToUrl(url);
     for (Header header : httpResponse.getAllHeaders()) {
         response.addHeader(header.getName(), header.getValue());
     }
     response.setStatus(httpResponse.getStatusLine().getStatusCode());
     return EntityUtils.toString(entity, "UTF-8");
}

Upvotes: 2

Views: 5222

Answers (1)

Kelsey Francis
Kelsey Francis

Reputation: 522

You could write a custom HttpMessageConverter for the CloseableHttpResponse type, which would allow you to simply return @ResponseBody CloseableHttpResponse.

See Mapping the response body with the @ResponseBody annotation for details.

Upvotes: 3

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