Trying to upload a file to a JAX-RS (jersey) serve

问题:

I'm trying to upload a file and other form data using multipart/form-data client with Jersey. I'm uploading to a REST web service also using Jersey. Here is the server code:

@POST
@Consumes(MediaType.MULTIPART_FORM_DATA)
@Produces(MediaType.APPLICATION_JSON)
public String create(@FormDataParam("file") InputStream file,
        @FormDataParam("file") FormDataContentDisposition fileInfo,
        @FormDataParam("name") String name,
        @FormDataParam("description") String description) {
    Ingredient ingredient = new Ingredient();
    ingredient.setName(name);
    ingredient.setDescription(description);
    ingredient.setImageName(fileInfo.getFileName());
    ingredient.setImagePath(context.getRealPath("/resources/uploads/"));
    // TODO save the file.
    try {
        JSONObject json = new JSONObject();
        try {
            ingredientService.create(ingredient);
        } catch (final InvalidParameterException ex) {
            logger.log(Level.INFO, ex.getMessage());
            json.put("result", false);
            json.put("error", ex.getMessage());
            return json.toString();
        } catch (final GoodDrinksException ex) {
            logger.log(Level.WARNING, null, ex);
            json.put("result", false);
            json.put("error", ex.getMessage());
            return json.toString();
        }
        json.put("ingredient", JsonUtil.ingredientToJSON(ingredient));
        return json.put("result", true).toString();
    } catch (JSONException ex) {
        logger.log(Level.SEVERE, null, ex);
        return "{\"result\",false}";
    }
}

I've tested the server code using a basic html form on my desktop and it works fine. The problem seems to be in the client. Here is the relevant client code.

ClientConfig config = new DefaultClientConfig();
client = Client.create(config);
client.addFilter(new LoggingFilter());
webResource = client.resource("http://localhost:8080/webapp/resources").path("ingredient");
FormDataMultiPart fdmp = new FormDataMultiPart();
if (file != null) {
    fdmp.bodyPart(new FileDataBodyPart("file", file, MediaType.APPLICATION_OCTET_STREAM_TYPE));
}
fdmp.bodyPart(new FormDataBodyPart("name", ingredient.getName()));
fdmp.bodyPart(new FormDataBodyPart("description", ingredient.getDescription()));

ClientResponse response = webResource.type(MediaType.MULTIPART_FORM_DATA_TYPE).post(ClientResponse.class, fdmp);
String string = response.getEntity(String.class);
logger.log(Level.INFO, "response: {0}", string);

I'm getting a 400 response from the server "The request sent by the client was syntactically incorrect"

Here is the message that is spit out of the logger, this one is without a file to keep the output brief:

1 > POST http://localhost:8080/webapp/resources/ingredient  
1 > Content-Type: multipart/form-data  
1 >   
--Boundary_5_1545082086_1303666703655  
Content-Type: text/plain  
Content-Disposition: form-data;name="name"  
Adam  
--Boundary_5_1545082086_1303666703655  
Content-Type: text/plain  
Content-Disposition: form-data;name="description"  
Test  
--Boundary_5_1545082086_1303666703655--  

What am I doing wrong in the client to get this working correctly?

回答1:

If you want to add Strings to the FormDataMultiPart just use the .field("name", "value") method the same way it is used for the file attachment (queryParam does not work).

Below is a working sample:

First, the server part which returns the content of the read file as a String:

@Path("file")
public class FileResource {

    @POST
    @Consumes(MediaType.MULTIPART_FORM_DATA)
    public Response handleUpload(@FormDataParam("file") InputStream stream) throws Exception {
        return Response.ok(IOUtils.toString(stream)).build();
    }
}

Second, the client method posting the file:

public void upload(String url, String fileName) {
    InputStream stream = getClass().getClassLoader().getResourceAsStream(fileName);
    FormDataMultiPart part = new FormDataMultiPart().field("file", stream, MediaType.TEXT_PLAIN_TYPE);

    WebResource resource = Client.create().resource(url);
    String response = resource.type(MediaType.MULTIPART_FORM_DATA_TYPE).post(String.class, part);
    assertEquals("Hello, World", response);
}

Third, the test environment:

Server server;

@Before
public void before() throws Exception {
    server = new Server(8080);
    server.addHandler(new WebAppContext(WEB_INF_DIRECTORY, "/"));
    server.start(); 
}

@After
public void after() throws Exception {
    server.stop();
}

@Test
public void upload() {
    upload("http://localhost:8080/file", "file.txt");
}

Finally, the maven dependencies:

<dependencies>
    <dependency>
        <groupId>junit</groupId>
        <artifactId>junit</artifactId>
        <version>4.8.2</version>
        <scope>test</scope>
    </dependency>
    <dependency>
        <groupId>com.sun.jersey</groupId>
        <artifactId>jersey-server</artifactId>
        <version>1.6</version>
    </dependency>
    <dependency>
        <groupId>com.sun.jersey</groupId>
        <artifactId>jersey-client</artifactId>
        <version>1.6</version>
    </dependency>
    <dependency>
        <groupId>com.sun.jersey.contribs</groupId>
        <artifactId>jersey-multipart</artifactId>
        <version>1.6</version>
    </dependency>
    <dependency>
        <groupId>org.mortbay.jetty</groupId>
        <artifactId>jetty-embedded</artifactId>
        <version>6.1.26</version>
    </dependency>
    <dependency>
        <groupId>commons-io</groupId>
        <artifactId>commons-io</artifactId>
        <version>2.0.1</version>
    </dependency>
</dependencies>

The file.txt is at the root of the classpath and contains Hello, World.

回答2:

Yves solution didn't work for me on the client side. I looked around a bit and found:

• http://puspendu.wordpress.com/2012/08/23/restful-webservice-file-upload-with-jersey/
• http://neopatel.blogspot.de/2011/04/jersey-posting-multipart-data.html
• http://www.mkyong.com/webservices/jax-rs/file-upload-example-in-jersey/

non of which would work with my current jersey 1.18 (see pom extract below). Most trouble was on the client side. I would get error messages like:

com.sun.jersey.api.client.ClientHandlerException: javax.ws.rs.WebApplicationException: java.lang.IllegalArgumentException: Missing body part entity of type 'text/plain'
at com.sun.jersey.client.urlconnection.URLConnectionClientHandler.handle(URLConnectionClientHandler.java:155)
at com.sun.jersey.api.client.Client.handle(Client.java:652)
at com.sun.jersey.api.client.WebResource.handle(WebResource.java:682)

The server side worked quickly with this code (which doesn't do anything interesting with the uploaded InputStream yet - fit to your needs )

@POST
@Consumes(MediaType.MULTIPART_FORM_DATA)
@Produces("text/plain")
public Response uploadFile(
        @FormDataParam("content") final InputStream uploadedInputStream,
        @FormDataParam("fileName") String fileName) throws IOException {
    String uploadContent=IOUtils.toString(uploadedInputStream);
    return Response.ok(uploadContent).build();
}   

the client side would work with this code:

import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;   
import javax.ws.rs.core.MediaType;

import com.sun.jersey.api.client.Client;
import com.sun.jersey.api.client.WebResource;
import com.sun.jersey.multipart.FormDataBodyPart;
import com.sun.jersey.multipart.FormDataMultiPart;
/**
 * upload the given file
 * 
 * inspired by
 * http://neopatel.blogspot.de/2011/04/jersey-posting-multipart-data.html
 * 
 * @param url
 * @param uploadFile
 * @return the result
 * @throws IOException
 */
public String upload(String url, File uploadFile) throws IOException {
    WebResource resource = Client.create().resource(url);
    FormDataMultiPart form = new FormDataMultiPart();
    form.field("fileName", uploadFile.getName());
    FormDataBodyPart fdp = new FormDataBodyPart("content",
            new FileInputStream(uploadFile),
            MediaType.APPLICATION_OCTET_STREAM_TYPE);
    form.bodyPart(fdp);
    String response = resource.type(MediaType.MULTIPART_FORM_DATA).post(String.class, form);
    return response;
}

pom.xml extract:

<properties>
  <jersey.version>1.18</jersey.version>
</properties>

<dependency>
  <groupId>com.sun.jersey</groupId>
  <artifactId>jersey-server</artifactId>
  <version>${jersey.version}</version>
</dependency>
<dependency>
  <groupId>com.sun.jersey</groupId>
  <artifactId>jersey-client</artifactId>
  <version>${jersey.version}</version>
</dependency>
<!--  Multipart support -->
<dependency>
  <groupId>com.sun.jersey.contribs</groupId>
  <artifactId>jersey-multipart</artifactId>
  <version>${jersey.version}</version>
</dependency>

回答3:

public DssResponse callPut(String url, Map<String, String> headers, FileDataBodyPart[] filePath, String boundary, String[] jsonString) throws IOException {
    Client client = ClientBuilder.newClient().register(MultiPartFeature.class);
    WebTarget webTarget = client.target(url);
    Builder builder = webTarget.request(MediaType.MULTIPART_FORM_DATA);
    FormDataMultiPart multiPart = new FormDataMultiPart();
    for (int i = 0; i < filePath.length; i++) {

        if (!filePath[i].getFileEntity().exists()) {
            throw new IOException("Invalid Input File - " + filePath[i].getFileEntity().getAbsolutePath());
        }

        multiPart.bodyPart(new FileDataBodyPart(filePath[i].getName(), filePath[i].getFileEntity()));
    }

    if (boundary != null)
        multiPart.type(Boundary.addBoundary(new MediaType("multipart", "form-data", Collections.singletonMap(Boundary.BOUNDARY_PARAMETER, boundary))));
    for (String jstr : jsonString) {
        multiPart.field("Content-Type", jstr, MediaType.APPLICATION_JSON_TYPE);
    }
    if (headers != null) {
        for (Entry<String, String> header : headers.entrySet()) {
            builder.header(header.getKey(), header.getValue());
            System.out.println(header.getKey() + "===============>>" + header.getValue());
        }
    }

    Response response = builder.accept(MediaType.APPLICATION_JSON).put(Entity.entity(multiPart, multiPart.getMediaType()));

    multiPart.close();

    // Assert.assertNotNull(response);
    if (response == null )
        throw new IOException ("Response is NULL");

    int status = response.getStatus();

    return dssResponse;
}

回答4:

Or just write a new file and upload it:

Writer output = null;
    File file = null;
    try {
      String text = "Rajesh Kumar";
      file = new File("write.txt");
      output = new BufferedWriter(new FileWriter(file));
        output.write(text);
        output.close();
    } catch (IOException e) {
        System.out.println("IOException e");
        e.printStackTrace();
    }

    InputStream is = null;

    try {
        is = new FileInputStream(file);
    } catch (FileNotFoundException e) {
        System.out.println("FileNotFoundException e");
        e.printStackTrace();
    } catch (IOException e) {
        System.out.println("IOException e");
        e.printStackTrace();
    }

    FormDataMultiPart part = new FormDataMultiPart().field("file", is, MediaType.TEXT_PLAIN_TYPE);
    res = service.path("rest").path("tenant").path(tenant1.getTenantId()).path("file").type(MediaType.MULTIPART_FORM_DATA_TYPE).post(ClientResponse.class, part);