CODEWITHSUNDEEP
javaweb-servicesrestjerseygrizzly
Sarah Weinberger
Sarah Weinberger

Reputation: 15561

GrizzlyHttpServerFactory.createHttpServer @GET with parameters

I created a simple GrizzlyHttpServerFactory.createHttpServer service and trying to issue a @GET operation, where the client would pass in arguments, however I am receiving an error:

enter image description here

I perused several examples and everything looks fine. Everything works, so long as I do not try and pass parameters. Here is the code that I have so far.

in main()

final ResourceConfig resourceConfig = new ResourceConfig(TestServerResource.class);
final HttpServer server = GrizzlyHttpServerFactory.createHttpServer(URI.create("http://localhost:8081/base/"), resourceConfig);

In Resource Class:

@Path("TestServer")
public class TestServerResource
{
    public static final String CLICHED_MESSAGE = "<?xml version=\"1.0\" encoding=\"UTF-8\"?>\r\n<note>\r\n<to>Tove</to>\r\n<from>Jani</from>\r\n<heading>Reminder</heading>\r\n<body>Don't forget me this weekend!</body>\r\n</note>\r\n\r\n";
    public static final String DO_MESSAGE = "<?xml version=\"1.0\" encoding=\"UTF-8\"?>\r\n<DoTask>\r\n\t<Response>%s</Response>\r\n</DoTask>\r\n\r\n";

    @GET
    @Path("getHello")
    @Produces(MediaType.APPLICATION_XML)
    public String getHello()
    {
        return CLICHED_MESSAGE;
    }

    @GET
    @Path("testGet3")
    @Consumes(MediaType.APPLICATION_FORM_URLENCODED)
    @Produces(MediaType.APPLICATION_XML)
    public String testGet3(MultivaluedMap<String, String> formParams)
    {
        // Get the parameters.
        String argTitle = formParams.getFirst("title");
        String argAuthor = formParams.getFirst("author");

        // Create the XML response.
        String xmlResponse = String.format(DO_MESSAGE, String.format("Book Title %s with author %s", argTitle, argAuthor));

        return xmlResponse;
    }
}

After service running on my CentOS 7 box. Here is terminal command.

Works (no parameters):

[test@Turbo Downloads]$ curl -H "Accept: application/xml" "http://localhost:8081/base/TestServer/getHello"
<?xml version="1.0" encoding="UTF-8"?>
<note>
<to>Tove</to>
<from>Jani</from>
<heading>Reminder</heading>
<body>Don't forget me this weekend!</body>
</note>

With parameters does NOT work:

[test@Turbo Downloads]$ curl -H "Accept: application/xml" "http://localhost:8081/base/TestServer/testGet3?title=smurfs&author=Gargamel"
<html><head><title>Grizzly 2.3.8</title><style><!--div.header {font-family:Tahoma,Arial,sans-serif;color:white;background-color:#003300;font-size:22px;-moz-border-radius-topleft: 10px;border-top-left-radius: 10px;-moz-border-radius-topright: 10px;border-top-right-radius: 10px;padding-left: 5px}div.body {font-family:Tahoma,Arial,sans-serif;color:black;background-color:#FFFFCC;font-size:16px;padding-top:10px;padding-bottom:10px;padding-left:10px}div.footer {font-family:Tahoma,Arial,sans-serif;color:white;background-color:#666633;font-size:14px;-moz-border-radius-bottomleft: 10px;border-bottom-left-radius: 10px;-moz-border-radius-bottomright: 10px;border-bottom-right-radius: 10px;padding-left: 5px}BODY {font-family:Tahoma,Arial,sans-serif;color:black;background-color:white;}B {font-family:Tahoma,Arial,sans-serif;color:black;}A {color : black;}HR {color : #999966;}--></style> </head><body><div class="header">Request failed.</div><div class="body">Request failed.</div><div class="footer">Grizzly 2.3.8</div></body></html>[test@Turbo Downloads]$

I did wrap the url in quotes, when passing arguments, so that is not the problem. Thoughts?

Here are just a few of the resources that I perused:

Specifying a header to curl with the -H does not matter seem to matter in this particular example, when not using arguments, as I tried both ways and I get the proper XML back. I do not have to specify the -X option, as GET is the default operation, which is what I am specifying. Single and double quotes yield the same result.

I tried to implement GrizzlyWebContainerFactory, as mentioned in 24518607, but I could not get ant to locate that jar, even though Eclipse was happy enough. I did not want to get side tracked, so I stayed focused.

Thoughts?

Upvotes: 1

Views: 2010

Answers (1)

Paul Samsotha
Paul Samsotha

Reputation: 208994

First your resource method is expecting data in the request body, for that it should be changed to @POST, then in curl command use

curl -X POST "http://localhost:8081/base/TestServer/testGet3"
     -d "title=smurfs" -d "author=Gargamel"

If you wanted to keep the data in the URL with GET, then you should change you resource method to the following

@GET
@Path("testGet3")
@Produces(MediaType.APPLICATION_XML)
public String testGet3(@Context UriInfo uriInfo)
{
    MultivaluedMap<String, String> params 
            = uriInfo.getQueryParameters();
}

Or you can list each query parameter individually with @QueryParam

public String testGet3(@QueryParam("title") String title,
                       @QueryParam("author") String author)

As an aside, for problems like this (where there is no useful error message), the first step I generally take is to create an ExceptionMapper<Throwable> that I register. Often there is some exception that is being swallowed by Jersey and it get wrapped in some Jersey exception which leads to a useless 500 with no message of the real problem. With the ExceptionMapper, in most cases it should see the real exception, and could at least print the stack trace. See here for info about the ExceptionMapper

Upvotes: 1

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