Hi Massimo,
the problem happened with 2.1. I have just upgraded to 2.3.2 but I do not
see any change. Below are the request/response headers for the upload form
that results in validation failure. I tried to upload You can see that I
tried to upload an image (file size is 1,127,797 bytes), for that image
request Content-Length is 1,128,340 bytes but response is 3,445,392 bytes
(3 times large than request?)
Let me know if I can provide more info for you.
Thanks,
Andy
1. Request URL:
http://127.0.0.1:8000/famtreepub/default/index
2. Request Method:
POST
3. Status Code:
200 OK
4. Request Headers
1. POST /famtreepub/default/index HTTP/1.1 Host: 127.0.0.1:8000
Connection: keep-alive Content-Length: 1128340 Cache-Control:
max-age=0
Origin: http://127.0.0.1:8000 User-Agent: Mozilla/5.0 (Windows NT 6.1;
WOW64) AppleWebKit/537.11 (KHTML, like Gecko) Chrome/23.0.1271.97
Safari/537.11 Content-Type: multipart/form-data;
boundary=----WebKitFormBoundarycW2MnFYBYRq4arq9 Accept:
text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
Referer:
http://127.0.0.1:8000/famtreepub/default/index Accept-Encoding:
gzip,deflate,sdch Accept-Language: en-US,en;q=0.8 Accept-Charset:
ISO-8859-1,utf-8;q=0.7,*;q=0.3 Cookie:
session_id_admin=127.0.0.1-33b3e06f-388e-4f4b-ab89-a106d87c67c0;
session_id_famtreepub=127.0.0.1-06dbb028-2086-4cc3-a568-77f069922d8c
5. Request Payload
1. ------WebKitFormBoundarycW2MnFYBYRq4arq9 Content-Disposition:
form-data; name="input_file"; filename="drevo.jpg" Content-Type:
image/jpeg
------WebKitFormBoundarycW2MnFYBYRq4arq9 Content-Disposition:
form-data;
name="output_type" OpenDocument
------WebKitFormBoundarycW2MnFYBYRq4arq9
Content-Disposition: form-data; name="_formkey"
23e17674-c5fc-43a4-92e5-840cdd0598d4
------WebKitFormBoundarycW2MnFYBYRq4arq9 Content-Disposition:
form-data;
name="_formname" input_data/create
------WebKitFormBoundarycW2MnFYBYRq4arq9--
6. Response Headers
1. HTTP/1.1 200 OK X-Powered-By: web2py Set-Cookie:
session_id_famtreepub=127.0.0.1-06dbb028-2086-4cc3-a568-77f069922d8c;
Path=/ Expires: Sun, 23 Dec 2012 16:42:55 GMT Pragma: no-cache
Cache-Control: no-store, no-cache, must-revalidate, post-check=0,
pre-check=0 Content-Type: text/html; charset=utf-8 Date: Sun, 23 Dec
2012
16:42:55 GMT Server: Rocket 1.2.6 Python/2.7.2 Content-Length: 3445392
Connection: keep-alive
On Thursday, December 20, 2012 11:27:36 PM UTC-8, Massimo Di Pierro wrote:
>
> Which web2py version? I believe this was fixed in 2.2 or 2.3.
>
> Massimo
>
> On Thursday, 13 December 2012 11:55:34 UTC-6, Andy Salnikov wrote:
>>
>> Hi,
>>
>> I have an issue with the upload form and postbacks. In my application I
>> need to validate file contents before accepting it from user upload form,
>> so naturally I try to use "onvalidation" method to it. The table used in
>> the forma is defined like this:
>>
>> db.define_table('input_data',
>> Field('input_file', 'upload', autodelete=True,
>> requires=IS_NOT_EMPTY(), label=T('Input file')),
>> Field('output_type', default="xxx",
>> requires=IS_IN_SET(['xxx', 'yyy']), label=T('Output format')),
>> Field('original_name', writable=False, readable=False),
>> Field('created', 'datetime', writable=False,
>> readable=False),
>> )
>>
>> My simplified action looks like this:
>>
>> def _validateFileForm(form):
>> try:
>> validator.validate(form.vars.input_file.file)
>> # on success set hidden fields
>> form.vars.original_name = request.vars.input_file.filename
>> form.vars.created = datetime.datetime.now()
>> except Exception, ex:
>> # if validation fails then display an error
>> form.errors.input_file = T('file_validation_failed') + ': ' +
>> str(ex)
>>
>> def index():
>>
>> form = SQLFORM(db.input_data, submit_button=T("Upload"))
>> if form.process(onvalidation=_validateFileForm).accepted:
>> # save file id in a session and go to options page
>> session.input_data_id = form.vars.id
>> redirect(URL(options_odt))
>>
>> return dict(form=form)
>>
>> Validation seems to work OK, if file is OK then everything is redirected
>> to next page, if file is bad then message is displayed in red under file
>> upload field.
>>
>> What is interesting about it is that when validation fails and form is
>> re-displayed it also looks like that the whole file contents is send back
>> to the client together with the form. For large uploaded file this could be
>> a lot of data. I see long delays and when I check the HTTP response headers
>> I see many-megabytes number there. Is there a way to avoid sending the file
>> contents back with the form during a postback?
>>
>> Thanks,
>> Andy
>>
>
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