[Seaside] Re: Rest - Ajax request - build file

[Sebastien Audier]

Hi Bob, Thanks for your answer.

Right, but before this problem, I failed to recover the file content
through the request.

If I don't slice the file, I can recover a WAFile instance by:

| file |
file := self requestContext request postFields values first...
And I stream on disk after that.

If I slice the file on web client, I can't recover the WAFile, because:

self requestContext  -> return an error.

What's wrong in my process ?


Thanks again,

2015-03-19 15:02 GMT-10:00 Bob Arning <arning315 at comcast.net>:

>  Not really sure I understand the question, but it sounds like you would
> need to include some sort of position information in each POST. That way
> the receiving end knows where in the file to put the data.
>
>
> On 3/19/15 8:42 PM, Sebastien Audier wrote:
>
> Okay, I dropped the idea of cut the file.
>
> One solution (not tested yet):  ZnConstants maximumEntitySize: 104857600
> (100 * 1024 * 1024) in order to increase the size of incoming entities to
> 100 M for example.
>
> But, if we find one solution for the other case, we could upload file
> faster.
>
>  Happy smalltalk ;)
>
> 2015-03-12 15:21 GMT-10:00 Sebastien Audier <sebastien.audier at gmail.com>:
>
>>
>> Hi all,
>>
>> I work on pharo 2.0 and seaside-REST with ZincServer.
>>
>> I need to rebuild a file which is uploaded by POST requests through
>> Seaside-REST but I don't really use WASession.
>>
>> On javascript layer, I cut the file with this function:
>>
>> document.querySelector('input[type="file"]').addEventListener('change', function(e) {  var name = this.files.name;
>>   var blob = this.files[0];
>>
>>   const BYTES_PER_CHUNK = 1024 * 1024; // 1MB chunk sizes.
>>   const SIZE = blob.size;
>>
>>   var start = 0;
>>   var end = BYTES_PER_CHUNK;
>>
>>   while(start < SIZE) {
>>     upload(name, blob.slice(start, end));
>>
>>     start = end;
>>     end = start + BYTES_PER_CHUNK;
>>   }}, false);
>>
>> And I send datas with this function:
>>
>>  function upload(aFileName, files) {
>>   var formData = new *FormData*();
>>
>>   for (var i = 0, file; file = files[i]; ++i) {
>>     *formData.append(aFileName, file);*
>>   }
>>
>>   var xhr = new XMLHttpRequest();
>>   xhr.open('POST', '/myPath', true);
>>   xhr.onload = function(e) { ... };
>>
>>   xhr.send(*formData*);  // multipart/form-data}
>>
>>
>>  I have a POST method on my handler, but I receive multiple requests.
>> On this way, I don't have access to the requestContext in order to get
>> the WAFile in request.
>> If I don't cut the file, it works and I can store on disk. But not in the
>> other case.
>>
>> Of course, my goal is to store the file on disk correctly.
>>
>> So,
>> How to get file content of each request ?
>> How  to rebuild and store the file correctly if the requests aren't
>> ordored ?
>>
>>  Any help ?
>>
>> Thank's a lot.
>>
>>
>>  --
>>  Sébastien AUDIER
>>
>>
>>  <http://www.objectfusion.fr/>
>>
>
>
>
>  --
>  Sébastien AUDIER
>
>
>  <http://www.objectfusion.fr/>
>
>
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>
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>


-- 
Sébastien AUDIER


<http://www.objectfusion.fr/>
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