How to add Headers on RESTful call using Jersey Client API

Question

Here is the Format for RESTful call   HEADERS      Content-Type  application json charset UTF-8     Authorization  Bearer Rc7JE8P7XUgSCPogjhdsVLMfITqQQrjg  REQUEST      GET https   api example com 1 realTime json   selection    includeAlerts   true   selectionType   registered   selectionMatch      isTheEvent   true   includeRuntime   true      Here is my codes                   try                                    Client client   Client create                     WebResource webResource                             client resource  https   api example com 1 realTime json                             selection    includeAlerts   true   selectionType   registered   selectionMatch      isTheEvent   true   includeRuntime   true                           add header Content-Type  application json charset UTF-8                  webResource setProperty  Content-Type    application json charset UTF-8                        add header  Authorization Bearer Rc7JE8P7XUgSCPogsdfdLMfITqQQrjg                  value    Bearer     value                   webResource setProperty  Authorization   value                     MultivaluedMap lt String  String gt  queryParams   new MultivaluedMapImpl                     queryParams add  json   js                       Get response from RESTful Server                  jsonStr   webResource get String class                    System out println  Testing                      System out println jsonStr                                      catch  Exception e                                      System out println  e getMessage                       e printStackTrace                      System exit 0                       But it returns error  com sun jersey api client UniformInterfaceException  GET https   api example com 1 realTime  returned a response status of 500     at com sun jersey api client WebResource handle WebResource java 607      at com sun jersey api client WebResource get WebResource java 187      at net yorkland restful GetThermostatlist GetThermostats GetThermostatlist java 60    I think I didn t add headers correctly    Can someone help me to fix it  Please give me advice how to add headers on request   Thank you

User · Answer

ClientResponse response   webResource                                 queryParams queryParams                                     header  Content-Type    application json                                      header  id    123                                      get ClientResponse class

User · Answer

String sBodys  Body   HashMap lt String String gt  headers  new HashMap lt  gt     Client c   Client create    WebResource resource   c resource  http   consulta rs    WebResource Builder builder   resource accept MediaType APPLICATION JSON   builder type MediaType APPLICATION JSON   if headers  null         LOGGER debug  se setean los headers          for  Map Entry lt String  String gt  entry   headers entrySet                String key   entry getKey              String value   entry getValue              LOGGER debug  key    entry getKey               LOGGER debug  value    entry getValue               builder header key  value               ClientResponse response   builder post ClientResponse class sBodys

User · Answer

I think you re looking for header name value  method  See WebResource header String  Object   Note it returns a Builder though  so you need to save the output in your webResource var

User · Answer

Here is an example how I do it   import javax ws rs client ClientBuilder  import javax ws rs client Entity  import javax ws rs client WebTarget  import javax ws rs core MultivaluedHashMap  import javax ws rs core MultivaluedMap  import java util Map  import java lang reflect Type  import com google gson Gson  import com google gson reflect TypeToken   Gson gson   new Gson    Type type   new TypeToken lt Map lt String  String gt  gt        getType    MultivaluedMap lt String  String gt  formData   new MultivaluedHashMap lt String  String gt     formData add  key1    value1    formData add  key1    value2    WebTarget webTarget   ClientBuilder newClient   target  https   some server url     String response   webTarget path  subpath subpath2   request   post Entity form formData   String class   Map lt String  String gt  gsonResponse   gson fromJson response  type

User · Answer

Try this   Client client   ClientBuilder newClient     String jsonStr   client              target  http                     request MediaType APPLICATION JSON                header  WM SVC NAME    RegistryService                header  WM QOS CORRELATION ID    d1f0c0d2-2cf4-497b-b630-06d609d987b0                 get String class     P S You can add any number of headers like this

User · Answer

I use the header name  value  method and give the return to webResource var   Client client   Client create    WebResource webResource   client resource  uri     MultivaluedMap lt String  String gt  queryParams   new MultivaluedMapImpl    queryParams add  json   js     set parametes for request  appKey    Bearer     appKey     appKey is unique number    Get response from RESTful Server get ClientResponse class   ClientResponse response   webResource queryParams queryParams       header  Content-Type    application json charset UTF-8        header  Authorization   appKey       get ClientResponse class    String jsonStr   response getEntity String class

User · Answer

If you want to add a header to all Jersey responses  you could also use a ContainerResponseFilter  from Jersey s filter documentation    import java io IOException  import javax ws rs container ContainerRequestContext  import javax ws rs container ContainerResponseContext  import javax ws rs container ContainerResponseFilter  import javax ws rs core Response    Provider public class PoweredByResponseFilter implements ContainerResponseFilter         Override     public void filter ContainerRequestContext requestContext  ContainerResponseContext responseContext          throws IOException                responseContext getHeaders   add  X-Powered-By    Jersey  -               Make sure that you initialize it correctly in your project using the  Provider annotation or through traditional ways with web xml

User · Answer

This snippet works fine  for sending the Bearer Token using Jersey Client       WebTarget webTarget   client target  endpoint         Invocation Builder invocationBuilder    webTarget request MediaType APPLICATION JSON       invocationBuilder header  Authorization    Bearer    Api Key         Response response   invocationBuilder get         String responseData   response readEntity String class        System out println response getStatus         System out println  responseData   responseData

[java] How to add Headers on RESTful call using Jersey Client API

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