CODEWITHSUNDEEP
javarestintellij-ideajerseyjax-rs
Mohammad Karmi
Mohammad Karmi

Reputation: 1445

Send file ( eg. file1.json) to POST REST API , input stream is null

I have the following REST API to parse the given JSON:

POST
@Consumes(MediaType.MULTIPART_FORM_DATA)
@Produces(MediaType.TEXT_PLAIN)
@Path("/test")
public String getText(@FormDataParam("file") InputStream fileInputStream, @FormDataParam("file") FormDataContentDisposition fileDetail) throws Exception {

when I test it using the chrome extension postman, the filedetail.getName() is working however the input stream received is null. here the post request I sent :

POST /parse/test HTTP/1.1
Host: localhost:8080
Cache-Control: no-cache

----WebKitFormBoundaryE19zNvXGzXaLvS5C
Content-Disposition: form-data; name="file"; filename="1.json"
Content-Type: 


----WebKitFormBoundaryE19zNvXGzXaLvS5C

The inputstream received is null .

Note: if I set the content type to "multipart/form-data" I got an exception :

java.lang.NullPointerException
    com.sun.jersey.multipart.impl.MultiPartReaderClientSide.unquoteMediaTypeParameters(MultiPartReaderClientSide.java:245)
    com.sun.jersey.multipart.impl.MultiPartReaderClientSide.readMultiPart(MultiPartReaderClientSide.java:172)
    com.sun.jersey.multipart.impl.MultiPartReaderServerSide.readMultiPart(MultiPartReaderServerSide.java:80)
    com.sun.jersey.multipart.impl.MultiPartReaderClientSide.readFrom(MultiPartReaderClientSide.java:158)
    com.sun.jersey.multipart.impl.MultiPartReaderClientSide.readFrom(MultiPartReaderClientSide.java:85)
    com.sun.jersey.spi.container.ContainerRequest.getEntity(ContainerRequest.java:490)
    com.sun.jersey.spi.container.ContainerRequest.getEntity(ContainerRequest.java:555)
    com.sun.jersey.multipart.impl.FormDataMultiPartDispatchProvider$FormDataInjectableValuesProvider.getInjectableValues(FormDataMultiPartDispatchProvider.java:122)
    com.sun.jersey.server.impl.model.method.dispatch.AbstractResourceMethodDispatchProvider$EntityParamInInvoker.getParams(AbstractResourceMethodDispatchProvider.java:153)
    com.sun.jersey.server.impl.model.method.dispatch.AbstractResourceMethodDispatchProvider$TypeOutInvoker._dispatch(AbstractResourceMethodDispatchProvider.java:183)

so I send it without any header, how can I read the file I sent from the postman, is there anything wrong with my REST API ?

Upvotes: 0

Views: 1448

Answers (1)

Seyed Ali Roshan
Seyed Ali Roshan

Reputation: 1574

do you use org.glassfish.jersey.bundle (jaxrs-ri) ?

if you do, you have to add MultiPartFeature.class to your ApplicationConfigure.java (which contains the Override of getClasses())

if you use grizzly so you have to put and register that class in ResourceConfig.

here an example for both

first grizzly

public static HttpServer startServer() {
    final ResourceConfig rc = new ResourceConfig().packages(true, "your.controllers.package");
    rc.register(MultiPartFeature.class);

    return GrizzlyHttpServerFactory.createHttpServer(URI.create("http://localhost:8080/"),rc);
}

now the jersey

@Override
public Set<Class<?>> getClasses() {
    Set<Class<?>> resources = new HashSet<>();
    addResources(resources);
    return resources;
}

private void addResources(Set<Class<?>> resources) {
    resources.add(MultiPartFeature.class);
}

I also remove Consumes annotation from my method (I believe it detect it as multipart/form-data by default) and also remove content-type from client request because in this case, it cause error 400

Upvotes: 0

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