Java – how to add parameters to a request from a containerrequestfilter

I use Jersey spring I have Jersey filter, which implements containerrequestfilter. I need to transfer objects in my jersey resources

For example:

@Provider

public class UnmarshalEntityFilter implements ContainerRequestFilter {

private static final Logger LOGGER = LoggerFactory.getLogger(UnmarshalEntityFilter.class);

@Override
public ContainerRequest filter(ContainerRequest containerRequest) {

    final String xml = getRequestBody(containerRequest);
    // Parse this xml to Object

    // How I can add this Object to my request and get from Jersey Resource ?

    return containerRequest;
}

private String getRequestBody(ContainerRequest request) {

    ByteArrayOutputStream out = new ByteArrayOutputStream();
    InputStream in = request.getEntityInputStream();
    StringBuilder sb = new StringBuilder();
    try {
        if (in.available() > 0) {
            ReaderWriter.writeTo(in,out);

            byte[] requestEntity = out.toByteArray();
            sb.append(new String(requestEntity,"UTF-8"));
        }

        return sb.toString();
    } catch (IOException ex) {
        throw new ContainerException(ex);
    }

}

}

Solution

See containerrequest #setproperty (string, object) method

So you can simply call

final String xml = getRequestBody(containerRequest);
containerRequest.setProperty("xml",xml);

Then inject HttpServletRequest into your handler and access it using httpservletrequest#getattribute ("XML")

Using Jersey 1.17, the corresponding method is containerrequest #getproperties (), which returns a variable map < string, Object > where you can put the properties to be synchronized with ServletRequest

You can retrieve the attributes in the Jersey resource from httpcontext:

@Context
private HttpContext httpCtx
...
final String xml = httpCtx.getProperties().get("xml")

Also, note the consumption request InputStream If some other component in the stack also needs to read from the stream, it will fail