将HttpServletRequest注入rest服务

Question

I want ot inject HttpServletRequest into my service via @Context annotation. Here is my example:

@Path("/")
public class MyService {
    @Context
    private HttpServletRequest request;
}

I use Apache CXF implementation and here are my dependencies from pom.xml:

<dependency>
    <groupId>javax.servlet</groupId>
    <artifactId>javax.servlet-api</artifactId>
    <version>3.1.0</version>
</dependency>

<dependency>
    <groupId>org.apache.cxf</groupId>
    <artifactId>cxf-rt-frontend-jaxrs</artifactId>
    <version>3.1.7</version>
</dependency>

<dependency>
    <groupId>javax.ws.rs</groupId>
    <artifactId>javax.ws.rs-api</artifactId>
    <version>2.0</version>
</dependency>

Also I use Apache Karaf OSGI container for deploying and that's why my app is a bundle packaging type. There is configuration for that:

<plugin>
    <groupId>org.apache.felix</groupId>
    <artifactId>maven-bundle-plugin</artifactId>
    <version>3.5.0</version>
    <configuration>
        <instructions>
            <Import-Package>
                !*,
                javax.ws.rs,
                javax.ws.rs.core,
                javax.ws.rs.ext,
                org.apache.cxf.jaxrs.impl.tl,
            </Import-Package>
            <Embed-Transitive>true</Embed-Transitive>
        </instructions>
    </configuration>
</plugin>

Without javax.ws.rs.ext and org.apache.cxf.jaxrs.impl.tl in import-package section I got one of these exceptions:

Caused by: java.lang.IllegalArgumentException: interface javax.ws.rs.ext.Providers is not visible from class loader 

Caused by: java.lang.IllegalArgumentException: interface org.apache.cxf.jaxrs.impl.tl.ThreadLocalProxy is not visible from class loader 

So now I have a follow exception when try to deploy my app:

Caused by: java.lang.IllegalArgumentException: Can not set javax.servlet.http.HttpServletRequest field MyService.request to org.apache.cxf.jaxrs.impl.tl.ThreadLocalHttpServletRequest

And I spent a lot of time to figure out what's the problem.. But one thing I note:

if I use ThreadLocalHttpServletRequest request instead of HttpServletRequest request , then it works without exceptions, but the request field is null when I try to use it from any methods.

What should I do to make it works properly with HttpServletReqest ?

Answer 1

try to use org.apache.cxf.jaxrs.ext.MessageContext

import javax.ws.rs.core.Context;
import org.apache.cxf.jaxrs.ext.MessageContext;



// your code goes like this
@Context 
private MessageContext context;



// try to get the request/response/session etc in your methods
HttpServletRequest req = context.getHttpServletRequest();
HttpServletResponse res = context.getHttpServletResponse()