Spring MVC consume application/zip

Question

I'm trying to add uploading zip files to my Spring REST API but I keep getting an error of not being able to consume application/zip

org.springframework.web.HttpMediaTypeNotSupportedException: Content type 'application/zip' not supported

Here is my function in my controller,

@RequestMapping(value = "/zip", method = RequestMethod.POST, consumes = "application/zip")
public ResponseEntity<String> uploadZip(@RequestBody InputStream inputStream) {
    try {
        uploadZip(inputStream)
        return new ResponseEntity<String>(HttpStatus.CREATED);
    } catch (IOException e) {
        logger.warn("Error reading file", e);
        return new ResponseEntity<String>(HttpStatus.BAD_REQUEST);
    } catch (Exception e) {
        logger.error("Error creating new job", e);
        return new ResponseEntity<String>(HttpStatus.INTERNAL_SERVER_ERROR);
    }
}

What is causing this exception?

Why do you think your app would/should be able to consume zipped content? — Sotirios Delimanolis, Dec 10 '15 at 00:11
@SotiriosDelimanolis I want to be able to directly upload zips into my web app. — Hank, Dec 10 '15 at 00:24
I get what you want. I'm asking why do you think what you have should work? What did you do to support that feature? (I'm basically asking you to show the research you did that lead you to believe that this would work.) — Sotirios Delimanolis, Dec 10 '15 at 00:26
Also, please clarify what the `InputStream` argument should be. Should it be the raw request body content? Should it be a stream resulting from unzipping the content? Something else? — Sotirios Delimanolis, Dec 10 '15 at 02:13
Instead of deleting your question, consider editing to clarify what you're asking for. — Sotirios Delimanolis, Dec 20 '15 at 22:48

score 1 · Answer 1 · edited May 23 '17 at 12:23

Given the @RequestBody annotation, Spring MVC will use a RequestResponseBodyMethodProcessor to resolve an argument for invoking your method. This HandlerMethodArgumentResolver will attempt to find an HttpMessageConverter which can parse application/zip body content and produce an instance of some subtype of InputStream.

There is no such built-in HttpMessageConverter implementation. You can write your own implementation and register it. The Spring MVC stack would pick it up and use it.

Alternatively, if you want just the raw body of the request as an InputStream, just remove the @RequestBody annotation. InputStream is one of the default supported argument types:

java.io.InputStream / java.io.Reader for access to the request’s content. This value is the raw InputStream/Reader as exposed by the Servlet API.

Given the raw InputStream, you could wrap it in a ZipInputStream and do the unzipping yourself.

Another option is to write and register your own implementation of a HandlerMethodArgumentResolver (that looks at a parameter annotation or the actual type of the parameter) that unzips the content of the request into some object.

My answer here explains Spring MVC's HandlerMethodArgumentResolver pattern in more detail.

Spring MVC consume application/zip

1 Answers1