Link for the potential fix
https://github.com/web2py/web2py/pull/2430

A quarta-feira, 16 de fevereiro de 2022 à(s) 21:18:48 UTC, Leonel Câmara 
escreveu:

> @cdbaron this was a sneaky one, but I've found it. I actually think this 
> one is a very old bug from 2016 and I think it might be affecting my 
> applications as well. 
>
>
> A segunda-feira, 14 de fevereiro de 2022 à(s) 17:39:21 UTC, cdbaron 
> escreveu:
>
>> Hi Massimo,
>>
>> Thanks for replying, this issue is driving me a little crazy...
>>
>> * I noticed the change in behavior when updating from Version 
>> 2.19.1-stable to the github version of the end of December 2021 (before 
>> version 2.22.1)
>> * After this, I downloaded version 2.21.1 from web2py.com and it worked 
>> fine.
>> * Then with version 2.22.1 I continue with this problem.
>> * Yes, this behavior change was only detected when I declared a default 
>> application in routes.py in the root directory of web2py.
>> * Yes, if I upload a file the download link doesn't work, and the form 
>> itself can't display the image.
>> * The file is uploaded correctly and is in the correct directory.
>> * If I delete the routes.py file everything works fine and the file that 
>> I uploaded when I had declared the default application can be downloaded 
>> without problems, the link (with the name of the application in the url) 
>> works fine.
>> * one more thing, when I have the default application declared, if I 
>> upload an image with a.jpeg filename everything works fine, with any other 
>> aa.jpeg filename for example the download link gives me a 400 error.
>>
>> I'm going to try to attach a zip file to a simple example application. A 
>> single table with a single field and a controller with a single function 
>> that creates a form.
>>
>> https://www.dropbox.com/s/46bu3wjhjexathu/myapp.zip?dl=0
>>
>>
>> El domingo, 13 de febrero de 2022 a las 22:44:19 UTC+1, Massimo Di Pierro 
>> escribió:
>>
>>> I am very confused by this. I cannot find any change that could cause 
>>> this change of behavior. Let me summarize to make sure I am understanding.
>>>
>>> You observed a change of behavior between 2.21.1 and 2.22 1.
>>> The change of behavior only manifests when you declare a default app in 
>>> routers.py
>>> The change of behavior consists of the fact that, if you upload a file 
>>> using a form, the link to download the file does not work.
>>> You can confirm that the file is there and the link works if no default 
>>> app in routers is provided.
>>>
>>> Is this all correct? If yes. I will debug more. If you could provide a 
>>> minimalist app to reproduce it would save me some time.
>>>
>>> Massimo
>>>
>>>
>>>
>>> On Wednesday, 9 February 2022 at 07:21:40 UTC-8 cdbaron wrote:
>>>
>>>> Now from github I can successfully download web2py.
>>>>
>>>> But I have a problem with a form with a field of type upload.
>>>>
>>>> With web2py 2.21.1 it works fine, but with version 2.22.1 it doesn't 
>>>> work. I have tested with python 3.7 and 3.8
>>>>
>>>> I already posted a query a few days ago, but I haven't had any 
>>>> response, I apologize for posting the same thing again.
>>>>
>>>> When I upload any image with a form, for example the one below, when 
>>>> downloading the image I get a 400 bad request error
>>>>
>>>> def upload_img():
>>>>     record = db(db.t_upload).select().first()
>>>>     form = SQLFORM(
>>>>         db.t_upload,
>>>>         record,
>>>>         upload=URL('default', 'download')
>>>>     )
>>>>
>>>>
>>>> I think it is some modification in web2py after publishing version 
>>>> 2.21.1
>>>>
>>>> I have tried to attach a .w2p file with the myapp application but it 
>>>> does not allow me to upload this type of file.
>>>>
>>>> The application works perfectly if I do NOT use a routes.py file in the 
>>>> web2py root directory.
>>>>
>>>> http://127.0.0.1:8000/myapp/upload/upload_img (Works fine)
>>>>
>>>> But with the file routers.py with this content:
>>>>
>>>> routers = dict(
>>>>     BASE=dict(
>>>>         default_application='myapp',
>>>>     ),
>>>> )
>>>>
>>>> The application does not work well, there is a 400 error when 
>>>> downloading the
>>>> image uploaded with the form
>>>>
>>>> http://127.0.0.1:8000/upload/upload_img (Doesn't work right)
>>>>
>>>> This 400 error also occurs whenever the image is used, not just on the 
>>>> form.
>>>>
>>>> I am doing something wrong?
>>>
>>>

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