| Re: [rest-dev] MultiPart Problems |
Hi,
I am using Jersey and have this as a dependency amongst the rest:
<dependency>
<groupId>org.glassfish.jersey.media</groupId>
<artifactId>jersey-media-multipart</artifactId>
<version>3.1.3</version>
</dependency>
I will look at a RESTEasy examples that James sent me links to later today. I did want to keep as close to the API. RESTEasy appears to build upon the API with enhancements. If I cannot find a way to get Jersey to work but will be able to use Jersey then I will go that route.
I will ask again, does anyone have a MultiPart example, client and end point, both server and SeBootstrap, that I can examine?
Thanks for everyone’s time on this. If anyone would like to see the specific code that is causing me grief then just reach out to me at omniprof@xxxxxxxxx and I’ll send you the Git coordinates.
_______________________________________________
Ken
From: rest-dev <rest-dev-bounces@xxxxxxxxxxx> On Behalf Of Markus Karg via rest-dev
Sent: Thursday, August 24, 2023 3:37 AM
To: 'Jakarta Rest project developer discussions' <rest-dev@xxxxxxxxxxx>
Cc: Markus Karg <markus@xxxxxxxxxxxxxxx>
Subject: Re: [rest-dev] MultiPart Problems
Ken,
your cases proofs the actual challenge with all Jakarta specs: One gets stuck rather easily as the self-certified implementations are far from being perfectly documented or bug-free. :-(
The counterpart to RESTEasy's resteasy-multipart-provider is Jersey's jersey-media-multipart (https://search.maven.org/search?q=a:jersey-media-multipart). Jan please chime in if I am wrong.
-Markus
Von: rest-dev [mailto:rest-dev-bounces@xxxxxxxxxxx] Im Auftrag von James Perkins via rest-dev
Gesendet: Donnerstag, 24. August 2023 00:30
An: Jakarta Rest project developer discussions
Cc: James Perkins
Betreff: Re: [rest-dev] MultiPart Problems
Hello,
I can only speak from the RESTEasy perspective, but there are a few things needed to get RESTEasy working with an example like this. I did find some bugs as well, so hopefully we can get those resolved soon and make the process a bit easier :)
I created a standalone example here [1]. The main three points are:
- You need to include the org.jboss.resteasy:resteasy-multipart-provider. Note in WildFly you DO NOT need to do this.
- For now until [2] is resolved you need to add jakarta.servlet.annotation.MultipartConfig to the application.
- In a CDI container, again until [2] is fixed, you'd need to @Veto your application.
I will work on an example in WildFly as well. If you've got any further questions, please let me know.
On Wed, Aug 23, 2023 at 12:35 PM omniprof--- via rest-dev <rest-dev@xxxxxxxxxxx> wrote:
Hi everyone,
I am developing a workshop for the Eclipse Foundation on Jakarta 10 REST 3.1 services. The workshop is divided into 8 modules. There is one module I cannot get my code to work and that is using MultiPart to either upload or download an image file.
It should be straightforward. I have modules that take advantage of the automatic conversion from an object to a JSON serialized version of the object and vice versa. I show both SeBootstrap and server-based REST services and REST clients. I even show code using either Jersey or RESTEasy.
Things have fallen apart when it comes to MultiPart. Let us begin with where I am stuck. Many have written about MultiPart, but I have yet to find any working examples. There are articles that show how to code the rest service end point and articles on how to write clients. What I have not found is an article or text that presents both the service endpoint and a matching client for MultiPart. Here is an example of what I mean from the official Eclipse documentation:
In the text is this code fragment:
@Path("widgets4")
public class WidgetsResource4 {
@POST
@Consumes(MediaType.MULTIPART_FORM_DATA)
public Response postWidget(@FormParam("part1Name") String part1,
@FormParam("part2Name") InputStream part2,
@FormParam("part3Name") EntityPart part3) {...}
}
There is no example how you might call this service. If I place this code in an SeBootstrap service and have it return Response.ok().build() I get:
WARNING: No injection source found for a parameter of type public jakarta.ws.rs.core.Response com.eclipse.restsebootstrap.FileUploadService.postWidget(java.lang.String,java.io.InputStream,jakarta.ws.rs.core.EntityPart) at index 2.
WARNING: No injection source found for a parameter of type public jakarta.ws.rs.core.Response com.eclipse.restsebootstrap.FileUploadService.uploadFile(java.lang.String,jakarta.ws.rs.core.EntityPart) at index 1.
I do not get any warnings when deployed as part of a server-based endpoint, but it just won’t work, throwing exceptions due to a null EntityPart. While they may be just warnings for a specific POST service, any other services that would normally run, fail as well. Remove this POST service and the remaining services work.
I suspect that there is a library I am missing in my dependencies. I discovered just yesterday that there are two Response classes, one for Servlets & family and one for web services. Rarely do online examples discuss dependencies. When there is code to download from a Git repo it is usually part of a project where numerous demos all use the same pom file with an overwhelming number of dependencies and plugins. Every example I am developing has its own repo.
All I am begging/pleading/asking for is a simple example of uploading and downloading binary files in a web service. While it should not make a difference, I work on Windows.
Ken Fogel
Java Champion
JChampions Conference Organizer
JCP Executive Committee Member
Research Scholar in Residence, Dawson College
Author of Transitioning to Java
All around nice guy, usually.
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James R. Perkins
JBoss by Red Hat
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