File upload along with other object in Jersey restful web service

Question

I want to create an employee information in the system by uploading an image along with employee data  I am able to do it with different rest calls using jersey  But I want to achieve in one rest call  I provide below the structure  Please help me how to do in this regard    POST  Path   upload2    Consumes  MediaType MULTIPART FORM DATA MediaType APPLICATION XML  MediaType APPLICATION JSON   public Response uploadFileWithData           FormDataParam  file   InputStream fileInputStream           FormDataParam  file   FormDataContentDisposition contentDispositionHeader          Employee emp             business login      Whenever I am trying to do  I get error in Chrome postman  The simple structure of my Employee json is given below          Name    John        Age   23       Email    john gmail com        Adrs              DoorNo    12-A            Street    Street-11            City    Bangalore            Country    Karnataka            However I can do it by making two different call  but I want to achieve in one rest call so that I can receive the file as well as the actual data of the employee   Request you to help in this regard

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I used file upload example from   http   www mkyong com webservices jax-rs file-upload-example-in-jersey   in my resource class i have below method   POST      Path   upload        Consumes MediaType MULTIPART FORM DATA      public Response  attachupload  FormDataParam  file   byte   is   FormDataParam  file   FormDataContentDisposition fileDetail   FormDataParam  fileName   String flename   attachService saveAttachment flename is       in my attachService java i have below method   public void saveAttachment String flename   byte   is                   TODO Auto-generated method stub          attachmentDao saveAttachment flename is                in Dao i have  attach setData is   attach setFileName flename     in my HBM mapping is like   lt property name  data  type  binary   gt               lt column name  data    gt   lt  property gt    This working for all type of files like  PDF  TXT   PNG etc

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When I tried  PaulSamsotha s solution with Jersey client 2 21 1  there was 400 error  It worked when I added following in my client code  MediaType contentType   MediaType MULTIPART FORM DATA TYPE  contentType   Boundary addBoundary contentType    Response response   t request            post Entity entity multipartEntity  contentType     instead of hardcoded MediaType MULTIPART FORM DATA in POST request call  The reason this is needed is because when you use a different Connector  like Apache  for the Jersey Client  it is unable to alter outbound headers  which is required to add a boundary to the Content-Type  This limitation is explained in the Jersey Client docs  So if you want to use a different Connector  then you need to manually create the boundary

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You can access the Image File and data from a form using MULTIPART FORM DATA By using the below code     POST  Path   UpdateProfile    Consumes value  MediaType APPLICATION JSON MediaType MULTIPART FORM DATA    Produces value  MediaType APPLICATION JSON MediaType APPLICATION XML   public Response updateProfile       FormDataParam  file   InputStream fileInputStream       FormDataParam  file   FormDataContentDisposition contentDispositionHeader       FormDataParam  ProfileInfo   String ProfileInfo       FormDataParam  registrationId   String registrationId         String filePath    filepath   contentDispositionHeader getFileName         OutputStream outputStream   null      try           int read   0          byte   bytes   new byte 1024           outputStream   new FileOutputStream new File filePath             while   read   fileInputStream read bytes      -1                outputStream write bytes  0  read                      outputStream flush            outputStream close          catch  FileNotFoundException e            e printStackTrace          catch  IOException e            e printStackTrace          finally           if  outputStream    null                 try                   outputStream close                  catch Exception ex

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The request type is multipart form-data and what you are sending is essentially form fields that go out as bytes with content boundaries separating different form fields To send an object representation as form field  string   you can send a serialized form from the client that you can then deserialize on the server  After all no programming environment object is actually ever traveling on the wire  The programming environment on both side are just doing automatic serialization and deserialization that you can also do  That is the cleanest and programming environment quirks free way to do it  As an example  here is a javascript client posting to a Jersey example service  submitFile         let data   new FormData        let account              quot name quot    quot test account quot            quot location quot    quot Bangalore quot             data append  file   this file       data append  quot accountKey quot    quot 44c85e59-afed-4fb2-884d-b3d85b051c44 quot        data append  quot device quot    quot test001 quot        data append  quot account quot   JSON stringify account             let url    quot http   localhost 9090 sensordb test file multipart upload quot        let config             headers                 Content-Type    multipart form-data                       axios post url  data  config  then function data           console log  SUCCESS              console log data data          catch function            console log  FAILURE                  Here the client is sending a file  2 form fields  strings  and an account object that has been stringified for transport  here is how the form fields look on the wire   On the server  you can just deserialize the form fields the way you see fit  To finish this trivial example       POST  Path  quot  file multipart upload quot    Consumes  MediaType MULTIPART FORM DATA   public Response uploadMultiPart  Context ContainerRequestContext requestContext           FormDataParam  quot file quot   InputStream fileInputStream           FormDataParam  quot file quot   FormDataContentDisposition cdh           FormDataParam  quot accountKey quot   String accountKey           FormDataParam  quot account quot   String json                    System out println cdh getFileName         System out println cdh getName         System out println accountKey            try           Account account   Account deserialize json           System out println account getLocation             System out println account getName                    catch  Exception e            e printStackTrace                   return Response ok   build

User · Answer

You can t have two Content-Types  well technically that s what we re doing below  but they are separated with each part of the multipart  but the main type is multipart   That s basically what you are expecting with your method  You are expecting mutlipart and json together as the main media type  The Employee data needs to be part of the multipart  So you can add a  FormDataParam  quot emp quot   for the Employee   FormDataParam  quot emp quot   Employee emp         Here s the class I used for testing  Path  quot  multipart quot   public class MultipartResource             POST      Path  quot  upload2 quot        Consumes  MediaType MULTIPART FORM DATA       public Response uploadFileWithData               FormDataParam  quot file quot   InputStream fileInputStream               FormDataParam  quot file quot   FormDataContentDisposition cdh               FormDataParam  quot emp quot   Employee emp  throws Exception                   Image img   ImageIO read fileInputStream           JOptionPane showMessageDialog null  new JLabel new ImageIcon img             System out println cdh getName             System out println emp                    return Response ok  quot Cool Tools  quot   build              First I just tested with the client API to make sure it works  Test public void testGetIt   throws Exception            final Client client   ClientBuilder newBuilder            register MultiPartFeature class           build        WebTarget t   client target Main BASE URI  path  quot multipart quot   path  quot upload2 quot         FileDataBodyPart filePart   new FileDataBodyPart  quot file quot                                                 new File  quot stackoverflow png quot            UPDATE  just tested again  and the below code is not needed         It s redundant  Using the FileDataBodyPart already sets the        Content-Disposition information     filePart setContentDisposition              FormDataContentDisposition name  quot file quot                                        fileName  quot stackoverflow png quot   build          String empPartJson                quot   quot                 quot     quot id  quot   1234  quot                 quot     quot name  quot     quot Peeskillet  quot  quot                 quot   quot        MultiPart multipartEntity   new FormDataMultiPart                field  quot emp quot   empPartJson  MediaType APPLICATION JSON TYPE               bodyPart filePart                  Response response   t request   post              Entity entity multipartEntity  multipartEntity getMediaType          System out println response getStatus         System out println response readEntity String class         response close       I just created a simple Employee class with an id and name field for testing  This works perfectly fine  It shows the image  prints the content disposition  and prints the Employee object  I m not too familiar with Postman  so I saved that testing for last  -   It appears to work fine also  as you can see the response  quot Cool Tools quot   But if we look at the printed Employee data  we ll see that it s null  Which is weird because with the client API it worked fine  If we look at the Preview window  we ll see the problem  There s no Content-Type header for the emp body part  You can see in the client API I explicitly set it MultiPart multipartEntity   new FormDataMultiPart            field  quot emp quot   empPartJson  MediaType APPLICATION JSON TYPE           bodyPart filePart    So I guess this is really only part of a full answer  Like I said  I am not familiar with Postman So I don t know how to set Content-Types for individual body parts  The image png for the image was automatically set for me for the image part  I guess it was just determined by the file extension   If you can figure this out  then the problem should be solved  Please  if you find out how to do this  post it as an answer  See UPDATE below for solution  And just for completeness     See here for more about MultiPart with Jersey   Basic configurations  Dependency   lt dependency gt       lt groupId gt org glassfish jersey media lt  groupId gt       lt artifactId gt jersey-media-multipart lt  artifactId gt       lt version gt   jersey2 version  lt  version gt   lt  dependency gt   Client config  final Client client   ClientBuilder newBuilder        register MultiPartFeature class       build     Server config     Create JAX-RS application  final Application application   new ResourceConfig        packages  quot org glassfish jersey examples multipart quot        register MultiPartFeature class    If you re having problems with the server configuration  one of the following posts might help  What exactly is the ResourceConfig class in Jersey 2  152 MULTIPART FORM DATA  No injection source found for a parameter of type public javax ws rs core Response   UPDATE So as you can see from the Postman client  some clients are unable to set individual parts  Content-Type  this includes the browser  in regards to it s default capabilities when using FormData  js   We can t expect the client to find away around this  so what we can do  is when receiving the data  explicitly set the Content-Type before deserializing  For example  POST  Path  quot upload2 quot    Consumes MediaType MULTIPART FORM DATA  public Response uploadFileAndJSON  FormDataParam  quot emp quot   FormDataBodyPart jsonPart                                     FormDataParam  quot file quot   FormDataBodyPart bodyPart          jsonPart setMediaType MediaType APPLICATION JSON TYPE        Employee emp   jsonPart getValueAs Employee class      It s a little extra work to get the POJO  but it is a better solution than forcing the client to try and find it s own solution  Another option is to use a String parameter and use whatever JSON library you use to deserialze the String to the POJO  like Jackson ObjectMapper   With the previous option  we just let Jersey handle the deserialization  and it will use the same JSON library it uses for all the other JSON endpoints  which might be preferred    Asides  There is a conversation in these comments that you may be interested in if you are using a different Connector than the default HttpUrlConnection

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Your ApplicationConfig should register the MultiPartFeature class from the glassfish jersey media   so as to enable file upload   javax ws rs ApplicationPath ResourcePath API ROOT  public class ApplicationConfig extends ResourceConfig     public ApplicationConfig               register the necessary headers files needed from client         register CORSConfigurationFilter class             The jackson feature and provider is used for object serialization           between client and server objects in to a json         register JacksonFeature class           register JacksonProvider class             Glassfish multipart file uploader feature         register MultiPartFeature class             inject and registered all resources class using the package           not to be tempered with         packages  com flexisaf safhrms client resources            register RESTRequestFilter class

[java] File upload along with other object in Jersey restful web service

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