Jersey PathParam with HTTP 405 error

问题

I'm using jersey for my rest server, and I got a HTTP 405 error, when I try to forward POST request to relative GET resource.

@Path("/")
public class MyResource {

    @POST
    @Path("/{method}")
    @Produces(MediaType.APPLICATION_JSON)
    public String postRequest(@PathParam("method") String method, @Context UriInfo uriInfo, String body) throws IOException {
        JsonParser parser = new JsonParser();
        JsonObject root = parser.parse(body).getAsJsonObject();
        JsonObject params = root;

        if (root.has("method")) {
            method = root.get("method").getAsString();
            params = root.getAsJsonObject("params");
        }

        UriBuilder forwardUri = uriInfo.getBaseUriBuilder().path(method);
        for (Map.Entry<String, JsonElement> kv : params.entrySet()) {
            forwardUri.queryParam(kv.getKey(), kv.getValue().getAsString());
        }

        return new SimpleHttpClient().get(forwardUri.toString());

    }

    @GET
    @Path("/mytest")
    @Produces(MediaType.APPLICATION_JSON)
    public String getTest(@QueryParam("name") String name)   {
        return name;
    }

}

curl -X POST -d {"method":"mytest","params":{"name":"jack"}} localhost/anythingbutmytest

curl -X GET localhost/mytest?name=jack

These two curl above work fine. But I get a 405 error , when I try to request like this:

curl -X POST -d {"method":"mytest","params":{"name":"jack"}} localhost/mytest

javax.ws.rs.NotAllowedException: HTTP 405 Method Not Allowed
at org.glassfish.jersey.server.internal.routing.MethodSelectingRouter.getMethodRouter(MethodSelectingRouter.java:466)
at org.glassfish.jersey.server.internal.routing.MethodSelectingRouter.access$000(MethodSelectingRouter.java:94)   
......

What should I do?

-------------------------------------Update-------------------------------------

curl -X POST -d {"method":"mytest","params":{"name":"jack"}} localhost/mytest

This curl work fine, when I add a post method like below. But I will write a same POST method for every GET Method like that, is there any other solution?

@POST @Path("/mytest") @Produces(MediaType.APPLICATION_JSON) public String postMyTest(@Context UriInfo uriInfo, String body) throws Exception { return postRequest(uriInfo.getPath(), uriInfo, body); }

Besides, is there any other way to re-route POST request to a method in the same class without building a new HTTP request?

回答1:

You should make

    @POST
    @Path("/mytest")

and not "getTest" method.Reason is below.

Command

curl -X POST -d {"method":"mytest","params":{"name":"jack"}} localhost/anythingbutmytest

will accept because of

@Path("/{method}") .

But

curl -X POST -d {"method":"mytest","params":{"name":"jack"}} localhost/mytest

will not accept because of

@GET
@Path("/mytest")

POST does not match GET.

来源：https://stackoverflow.com/questions/44538487/jersey-pathparam-with-http-405-error