java.lang.NullPointerException at com.sun.jersey.multipart.impl.MultiPartReaderClientSide.unquoteMediaTypeParameters - jersey

Question

I have a rest class which upload an image to a folder. By the time I try to test it using postman, my rest class does not fire.
Here is my rest class -
package uploadRest;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import javax.ws.rs.Consumes;
import javax.ws.rs.POST;
import javax.ws.rs.Path;
import javax.ws.rs.core.MediaType;
import javax.ws.rs.core.Response;
import com.sun.jersey.core.header.FormDataContentDisposition;
import com.sun.jersey.multipart.FormDataParam;
#Path("/file")
public class UploadFileService {
#POST
#Path("/upload")
#Consumes(MediaType.MULTIPART_FORM_DATA)
public Response uploadFile(
#FormDataParam("file") InputStream uploadedInputStream,
#FormDataParam("file") FormDataContentDisposition fileDetail) {
try {
System.out.println("Hi ");
String uploadedFileLocation = "d://uploaded/" + fileDetail.getFileName();
// save it
writeToFile(uploadedInputStream, uploadedFileLocation);
String output = "File uploaded to : " + uploadedFileLocation;
return Response.status(200).entity(output).build();
}
catch (Exception e){
e.printStackTrace();
}
return null;
}
// save uploaded file to new location
private void writeToFile(InputStream uploadedInputStream,
String uploadedFileLocation) {
try {
OutputStream out = new FileOutputStream(new File(
uploadedFileLocation));
int read = 0;
byte[] bytes = new byte[1024];
out = new FileOutputStream(new File(uploadedFileLocation));
while ((read = uploadedInputStream.read(bytes)) != -1) {
out.write(bytes, 0, read);
}
out.flush();
out.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
I try to test it via postman but it doesn't print "Hi" which is in System.out.println()
Here is what is printed in console: -
cache-control: no-cache
Postman-Token: 35942cde-5bcb-487d-896e-b772e9430e55
Content-Type: multipart/form-data
User-Agent: PostmanRuntime/6.1.6
Accept: */*
accept-encoding: gzip, deflate
Connection: keep-alive
Transfer-Encoding: chunked
]] Root cause of ServletException.
java.lang.NullPointerException
at com.sun.jersey.multipart.impl.MultiPartReaderClientSide.unquoteMediaTypeParameters(MultiPartReaderClientSide.java:245)
at com.sun.jersey.multipart.impl.MultiPartReaderClientSide.readMultiPart(MultiPartReaderClientSide.java:172)
at com.sun.jersey.multipart.impl.MultiPartReaderServerSide.readMultiPart(MultiPartReaderServerSide.java:80)
at com.sun.jersey.multipart.impl.MultiPartReaderClientSide.readFrom(MultiPartReaderClientSide.java:158)
at com.sun.jersey.multipart.impl.MultiPartReaderClientSide.readFrom(MultiPartReaderClientSide.java:85)
Truncated. see log file for complete stacktrace
>
This is how I am sending request using postman -

Answer 1

problem was solved by sending data as form-data instead of binary. I changed the method of sending data in postman body from binary to form-data and the problem was solved.
Thanks #Vikas Sachdeva because of sharing helpful link :)
Tool for sending multipart/form-data request