You said the blob ends up in the blobstore but your webhook is not called?
What's the appid?
On Friday, 9 March 2012 21:32:58 UTC+11, Killian wrote:
>
> Hi Stuart,
>
> Yes apologies if I wasn't clear.
>
> On the app engine side of things I'm calling createUploadURL and placing
> the resulting url in the task payload as follows:
>
> BlobstoreService blobstoreService =
> BlobstoreServiceFactory.getBlobstoreService();
>
> String uploadURL = blobstoreService.createUploadUrl("/"+url);
>
> task.payload(uploadURL);
>
>
> Alternatively, would anyone know of sample code in java trying to
> programmatically upload blobs from an external app (posting a response to a
> pull task queue) might make things easier. I'm surprise I couldn't find
> anything like that on the web.
>
> In a nutshell all I'm trying to do is reproduce the architecture of the
> first pull task system presented in the Google I/O talk
> http://youtu.be/AM0ZPO7-lcE in java, to place a response to the pull task
> queue for the app engine app to consume.
>
> Thanks for your help :-)
>
>
>
> On Thursday, 8 March 2012 22:13:45 UTC, Stuart Langley wrote:
>>
>> Is that the actual code?
>>
>> You need to call createUploadURL for each blob you want to upload.
>>
>> On Friday, 9 March 2012 00:03:43 UTC+11, Killian wrote:
>>>
>>> Hi Lads,
>>>
>>> This issue has been bugging me for a while now and just wasted the last
>>> 2 days with no solution found. I'm getting desperate at this stage !
>>>
>>> My aim was to use the Task Queue Pull service to run some NLP processing
>>> outside of app engine on an external VM. That's working fine however all
>>> the trouble started when I discovered that the output produced by the
>>> external VM could be fed back into the Task Queue. Following the example in
>>> the Google I/O video http://youtu.be/AM0ZPO7-lcE , I then decided to
>>> provide the response of the task queue as a Blob upload to the app engine.
>>> So I have the working example
>>> http://code.google.com/appengine/docs/java/blobstore/overview.htmlimplement
>>> and working perfectly. (ie: I can manually upload a file using
>>> the jsp form and store it).
>>>
>>> The problem is that for obvious reasons I need to send this post request
>>> from the VM programmatically. And that's were things start getting messy.
>>> Since the video only provides an example in Python and not in java I've
>>> been struggling find a solution to this.
>>>
>>> Looking around it seems like I need the httpcomponents-client-4.1.3
>>> apache library to create post requests.
>>> So this is the workflow I have:
>>> I generate the upload url from the app engine side and place it in the
>>> task queue payload which is then retrieved by the VM correctly.
>>>
>>> on the VM side this is what I do:
>>>
>>> String uploadURL =
>>> "http://<host>/_ah/upload/agtsaW5ndWFib3gxMHIbCxIVX19CbG9iVXBsb2FkU2Vzc2lvbl9fGAEM"
>>> ;
>>>
>>> DefaultHttpClient httpclient = new DefaultHttpClient();
>>>
>>> HttpPost method = new HttpPost(uploadURL);
>>>
>>> MultipartEntity entity = new MultipartEntity();
>>>
>>> File f = new File("dummyFileToUpload.txt");
>>>
>>> FileBody fileBody = new FileBody(f);
>>>
>>> entity.addPart("myFile", fileBody);
>>>
>>> method.setEntity(entity);
>>>
>>> HttpResponse response = httpclient.execute(method);
>>>
>>> System.out.println(response.getStatusLine());
>>>
>>> PROBLEM:
>>>
>>> When I do this both in development mode or production mode, I receive a
>>> "http 404 not found" response. and it seems like the upload servlet isn't
>>> run at all (if I'm in deug mode for instance). However when I look in the
>>> blob store, the blob was indeed uploaded correctly which is good news of
>>> course however it means I can't get a proper response from the app engine
>>> side and more importantly can't run anything in the upload servlet.
>>>
>>> I'm guessing my post request mustn't be created properly which would
>>> explain why the app engine side is reacting weird? Is there anything
>>> obviously wrong in my approach?
>>>
>>> Would really appreciate any advice on this.
>>>
>>> Thanks in advance :-)
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>
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