FileUpload with grails-jaxrs

[confile]

Does this plugin also support FileUpload with REST?

I an normal Grails controler action you would do something like this:

CommonsMultipartFile file = (CommonsMultipartFile) request.getFile('file')

How to I do fileupload in a rest resource to get the CommonsMultipartFile?

[steffimueller]

+1 I am interested in this answer too

[davidecavestro]

Sorry I nave no access to code now. However I've got uploads working simply following Jersey 1.x tutorials

[confile]

Could you post some code how to get the CommonsMultipartFile?

[michaelrice]

Here is one way of doing it:

    @POST
    @Path('/upload')
    Response upload(InputStream data) {
        StringBuffer content = new StringBuffer()
        // Max file size allowed (32 MiB).
        int limit = (32 * 1024 * 1024)

        // The current number of bytes read.
        int current = 0

        // The buffer (reads in chunks of 8 KiB).
        char[] chunk = new char[(8 * 1024)]

        // Number of bytes to project to detect limit breach.
        int byteProjection
        // Reader.
        Reader reader = new BufferedReader(new InputStreamReader(data, "UTF-8"))
        // Read from data.
        while ((byteProjection = reader.read(chunk)) != -1) {

            // If we project that this read has breached the limit, reject.
            if (current + byteProjection > limit) {
                // throw bad request here   
            }    

            content.append(chunk, 0, byteProjection)
            current += byteProjection
        }
        // what ever...

[confile]

grreat thank you

[noamt]

Closing the issue if an answer was provided

[confile]

yes thank you

[confile]

I tried to Upload a file using the following resource:

@POST
@Produces('application/json')
UploadDto upload(
        @Context HttpServletRequest request,
        @QueryParam("cookie") String cookie) {

    def contentType
    byte [] fileBytes

    log.debug "upload - cookie: "+cookie

    try{
        if (request instanceof MultipartHttpServletRequest) {
            log.debug "request instanceof MultipartHttpServletRequest"

            MultipartHttpServletRequest myrequest = request
            CommonsMultipartFile file = (CommonsMultipartFile) myrequest.getFile('file')
            fileBytes = file.bytes
            contentType = file.contentType
            log.debug ">>>>> upload size of the file in byte: "+ file.size
        }
        else if (request instanceof SecurityContextHolderAwareRequestWrapper) {
            log.debug "request instanceof SecurityContextHolderAwareRequestWrapper"

            SecurityContextHolderAwareRequestWrapper myrequest = request

            //get uploaded file's inputStream
            InputStream inputStream = myrequest.inputStream

            fileBytes = IOUtils.toByteArray(inputStream);
            contentType = myrequest.getHeader("Content-Type")
            log.debug ">>>>> upload size of the file in byte: "+ fileBytes.size()
        }
        else {
            log.error "request is not a MultipartHttpServletRequest or SecurityContextHolderAwareRequestWrapper"
            println "request: "+request.class
        }
    }
    catch (IOException e) {
        log.error("upload() failed to save file error: ", e)
    }
}

When I use the code in my Grails Controller it worked well but when I use it in a REST Resource I always get: request is not a MultipartHttpServletRequest or SecurityContextHolderAwareRequestWrapper

The send a file blob from JavaScript I use XMLHttpRequest which contains the blob in the body and some query parameters.

Did I miss something?

[davidecavestro]

@confile usually the following is enough for my needs

@Consumes(MediaType.MULTIPART_FORM_DATA)
public Response uploadMyFile(
    @FormDataParam('file') InputStream fileInputStream,
    @FormDataParam('file') FormDataContentDisposition contentDispositionHeader
    ...){...}

I've never tried sending the file as a blob in the body of a XHR. Maybe the plugin controller is consuming the request, returning an instance of another type, btw you missed to tell us the actual request type.

[confile]

The request type is POST. How do I get query parameter from the request?

Here is how I send the file from JavaScript. I use this to make sending possible cross devices:

    var str2ab_blobreader = function(str, callback) {
        var blob;
        BlobBuilder = window.MozBlobBuilder || window.WebKitBlobBuilder
                || window.BlobBuilder;
        if (typeof (BlobBuilder) !== 'undefined') {
            var bb = new BlobBuilder();
            bb.append(str);
            blob = bb.getBlob();
        } else {
            blob = new Blob([ str ]);
        }
        var f = new FileReader();
        f.onload = function(e) {
            callback(e.target.result)
        }
        f.readAsArrayBuffer(blob);
    }

    var fileName = "fileName.jpg";
    var contentType = "image/jpeg";
    if (file.type.toString().toLowerCase().indexOf("png") > -1) {
        fileName = "fileName.png";
        contentType = "image/png";
    }

    var xhrNativeObject = new XMLHttpRequest();
    xhrNativeObject.open("post", url, true);
    xhrNativeObject.setRequestHeader("Content-Type", contentType);

    xhrNativeObject.onload = function(event) {

        var targetResponse = event.currentTarget;
        if ((targetResponse.readyState == 4)
                && (targetResponse.status == 200)) {
            var obj = JSON.parse(targetResponse.responseText);
            console.log(obj.uploadImageId);
        } else {
            console.log("fail");
        }
    }

    var buffer = str2ab_blobreader(file, function(buf) {
        xhrNativeObject.send(buf);
    });

[davidecavestro]

About the request type, I was asking which value you got from println "request: "+request.class? About accessing a query param: you already did it declaring a param on the resource method and annotating it with @QueryParam (i.e. @QueryParam("cookie") String cookie)

[confile]

The result of println "request: "+request.class is

request: com.sun.proxy.$Proxy58

Do you have any idea how to fix this?

[confile]

@davidecavestro Do you have any idea how to fix this?

[davidecavestro]

The request instance is proxied with a jdk proxy, hence instanceof logic fails. That's one of the reasons why it should ben avoided using instanceof when possible. I'd proceed declaring a stream param as I suggested above then accessing the query params through the context

[confile]

@davidecavestro FormDataParam is not part of javax.ws.rs did you mean FormParam?

[confile]

@davidecavestro Which resources do I have to import to use FormDataParam?

[davidecavestro]

I meant FormDataParam available from jersey-multipart.

[confile]

I tried to use compile 'com.sun.jersey.contribs:jersey-multipart:1.18.2'

When I use this:

@Consumes(MediaType.MULTIPART_FORM_DATA)
public Response uploadMyFile(
    @FormDataParam('file') InputStream fileInputStream,
    @FormDataParam('file') FormDataContentDisposition contentDispositionHeader
    ...){...}

I get the following error:

2014-12-04 10:46:54,084 [localhost-startStop-1] ERROR [localhost].[/buddyis]  - Exception sending context initialized event to listener instance of class org.grails.jaxrs.web.JaxrsListener
Message: tried to access method com.sun.jersey.core.reflection.ReflectionHelper.getContextClassLoader()Ljava/lang/ClassLoader; from class com.sun.jersey.spi.scanning.AnnotationScannerListener
    Line | Method
->>   92 | <init>               in com.sun.jersey.spi.scanning.AnnotationScannerListener
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 
|     59 | <init>               in com.sun.jersey.spi.scanning.PathProviderScannerListener
|     79 | init . . . . . . . . in com.sun.jersey.api.core.ScanningResourceConfig
|    104 | init                 in com.sun.jersey.api.core.PackagesResourceConfig
|     78 | <init> . . . . . . . in     ''
|     89 | <init>               in     ''
|    696 | createResourceConfig in com.sun.jersey.spi.container.servlet.WebComponent
|    674 | createResourceConfig in     ''
|    203 | init . . . . . . . . in     ''
|    374 | init                 in com.sun.jersey.spi.container.servlet.ServletContainer
|    557 | init . . . . . . . . in     ''
|     51 | init                 in org.grails.jaxrs.web.JerseyServlet
|    175 | init . . . . . . . . in org.grails.jaxrs.web.JaxrsContext
|    165 | init                 in     ''
|     45 | contextInitialized . in org.grails.jaxrs.web.JaxrsListener
|    262 | run                  in java.util.concurrent.FutureTask
|   1145 | runWorker . . . . .  in java.util.concurrent.ThreadPoolExecutor
|    615 | run                  in java.util.concurrent.ThreadPoolExecutor$Worker
^    745 | run . . . . . . . .  in java.lang.Thread
Error |
2014-12-04 10:46:54,111 [localhost-startStop-1] ERROR core.StandardContext  - Error listenerStart
Error |

Do you have any idea how to fix it?

[prabhatsubedi]

Hi @confile , did you find solution? I am stuck here too ...

[confile]

No