Hi Qing,
The REST API does not really support content negotiation and everything
is returned as JSON with a plain text content type. I believe this was
done mainly so that formatting could be preserved when viewing in a
browser. If you have a requirement for application/json type responses
you could open a Jira and we can look into supporting it.
Thanks,
Tom
On 6/12/14 12:12 AM, Qing Chi 79624 wrote:
Hi guys,
Following is content of TestAmbariRestApi class. Why
the Content-Type always is text/plain on the response using ambari
REST API?
import com.sun.jersey.api.client.Client;
import com.sun.jersey.api.client.ClientResponse;
import com.sun.jersey.api.client.WebResource;
import com.sun.jersey.api.client.config.ClientConfig;
import com.sun.jersey.api.client.config.DefaultClientConfig;
import com.sun.jersey.api.client.filter.HTTPBasicAuthFilter;
import com.sun.jersey.api.json.JSONConfiguration;
import com.vmware.bdd.api.model.ApiClusterList;
import java.net.URI;
import javax.ws.rs.core.MediaType;
import javax.ws.rs.core.UriBuilder;
public class TestAmbariRestApi {
private static URI getBaseURI() {
return UriBuilder.fromUri("http://10.141.73.63:8080/api/v1";).build();
}
public static void main(String[] args) {
ClientConfig config = new DefaultClientConfig();
config.getFeatures().put(JSONConfiguration.FEATURE_POJO_MAPPING,
Boolean.TRUE);
Client client = Client.create(config);
client.addFilter(new HTTPBasicAuthFilter("admin", "admin"));
WebResource resource = client.resource(getBaseURI());
ClientResponse response;
response =
resource.path("clusters").accept(MediaType.APPLICATION_JSON).type(MediaType.APPLICATION_JSON).get(ClientResponse.class);
System.out.println(response.getStatus());
System.out.println(response.getHeaders().get("Content-Type"));
System.out.println(response.getEntity(ApiClusterList.class));
}
}
Result of running TestAmbariRestApi,
406
[text/plain;charset=ISO-8859-1]
Jun 12, 2014 11:58:43 AM com.sun.jersey.api.client.ClientResponse
getEntity
SEVERE: A message body reader for Java class
com.vmware.bdd.api.model.ApiClusterList, and Java type class
com.vmware.bdd.api.model.ApiClusterList, and MIME media type
text/plain; charset=ISO-8859-1 was not found
Jun 12, 2014 11:58:43 AM com.sun.jersey.api.client.ClientResponse
getEntity
SEVERE: The registered message body readers compatible with the MIME
media type are:
text/plain; charset=ISO-8859-1 ->
com.sun.jersey.core.impl.provider.entity.StringProvider
com.sun.jersey.core.impl.provider.entity.ReaderProvider
*/* ->
com.sun.jersey.core.impl.provider.entity.FormProvider
com.sun.jersey.core.impl.provider.entity.MimeMultipartProvider
com.sun.jersey.core.impl.provider.entity.StringProvider
com.sun.jersey.core.impl.provider.entity.ByteArrayProvider
com.sun.jersey.core.impl.provider.entity.FileProvider
com.sun.jersey.core.impl.provider.entity.InputStreamProvider
com.sun.jersey.core.impl.provider.entity.DataSourceProvider
com.sun.jersey.core.impl.provider.entity.XMLJAXBElementProvider$General
com.sun.jersey.core.impl.provider.entity.ReaderProvider
com.sun.jersey.core.impl.provider.entity.DocumentProvider
com.sun.jersey.core.impl.provider.entity.SourceProvider$StreamSourceReader
com.sun.jersey.core.impl.provider.entity.SourceProvider$SAXSourceReader
com.sun.jersey.core.impl.provider.entity.SourceProvider$DOMSourceReader
com.sun.jersey.json.impl.provider.entity.JSONJAXBElementProvider$General
com.sun.jersey.core.impl.provider.entity.XMLRootElementProvider$General
com.sun.jersey.core.impl.provider.entity.XMLListElementProvider$General
com.sun.jersey.core.impl.provider.entity.XMLRootObjectProvider$General
com.sun.jersey.core.impl.provider.entity.EntityHolderReader
com.sun.jersey.json.impl.provider.entity.JSONRootElementProvider$General
com.sun.jersey.json.impl.provider.entity.JSONListElementProvider$General
Exception in thread "main"
com.sun.jersey.api.client.ClientHandlerException: A message body
reader for Java class com.vmware.bdd.api.model.ApiClusterList, and
Java type class com.vmware.bdd.api.model.ApiClusterList, and MIME
media type text/plain; charset=ISO-8859-1 was not found
at
com.sun.jersey.api.client.ClientResponse.getEntity(ClientResponse.java:630)
at
com.sun.jersey.api.client.ClientResponse.getEntity(ClientResponse.java:586)
at com.vmware.bdd.api.TestAmbariRestAPI.main(TestAmbariRestAPI.java:37)
And I used the following command, and the Content-Type is text/plain
on response.
curl -H "Content-Type: application/json" -H "X-Requested-By: ambari"
-X GET --user "admin:admin" -i http://10.141.73.63:8080/api/v1/clusters/
HTTP/1.1 200 OK
Set-Cookie: AMBARISESSIONID=1i36z3duc4cjr561r6deiub8;Path=/
Expires: Thu, 01 Jan 1970 00:00:00 GMT
Content-Type: text/plain
Content-Length: 422
Server: Jetty(7.6.7.v20120910)
{
"href" : "http://10.141.73.63:8080/api/v1/clusters/";,
"items" : [
{
"href" : "http://10.141.73.63:8080/api/v1/clusters/test";,
"Clusters" : {
"cluster_name" : "test",
"version" : "HDP-2.1"
}
}
]
}
Anybody give me some help?
Thanks,
-qing
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