Embed pdf and file download

[Gael Princivalle]

Hello all.

I'm used to embed pdf files like that:

View:

<object data="http://www.domain1.com/pdf/file.pdf#toolbar=1&amp;navpanes=0&amp;scrollbar=1&amp;page=1&amp;view=FitH"

    type="application/pdf"

    width="100%"

    height="100%">

Pdf file are uploaded by sftp.

It works well.

Now for another application files are uploaded in a table.

Model:

db.define_table('memos',

    Field('code', type='string', requires=IS_NOT_EMPTY()),

    Field('memo_file', 'upload'),

    auth.signature)

View:

<object data="{{=URL('download', args=grid_memos.view_form.record.memo_file, host=True, scheme=True)}}#toolbar=1&amp;navpanes=0&amp;scrollbar=1&amp;page=1&amp;view=FitH"

    type="application/pdf"

    width="100%"

    height="100%">

Pdf file is not displayed. I've tried with relative or absolute (host=True, scheme=True) path without success.

Here is the result in the html page:

<object	data="http://www.domain2.com/download/memos.memo_file.a1c04cabc73895b5.487964726f7665722d48313630312e706466.pdf#toolbar=1&amp;navpanes=0&amp;scrollbar=1&amp;page=1&amp;view=FitH"
    type="application/pdf"
    width="100%"
    height="100%">

Replacing in this new application {{=URL('download',... by a sftp downloaded file path from my other application http://www.domain1.com/pdf/file.pdf pdf file is displayed. And it's the same pdf file.

Someone knows why?

Thanks, regards.

[Gael Princivalle]

I've tried also with this plugin:

http://pdfobject.com/

without success.

[Gael Princivalle]

My doubt was also about the file name, that could give problems perhaps, with all these dots.

But I've uploaded the file memos.memo_file.a1c04cabc73895b5.487964726f7665722d48313630312e706466.pdf on my ftp server and tried to embed it and it works.

It seems that's the fact that the pdf file is downloaded from a record make fails something.

[Gael Princivalle]

Someone have an idea?

[Leonel Câmara]

I'm guessing the problem is that response.download sets Content-Disposition as an attachment. Make another controller function in default.py

def stream():
    import re
    from pydal.exceptions import NotAuthorizedException, NotFoundException


    if not request.args:
        raise HTTP(404)
    name = request.args[-1]
    items = re.compile('(?P<table>.*?)\.(?P<field>.*?)\..*').match(name)
    if not items:
        raise HTTP(404)
    (t, f) = (items.group('table'), items.group('field'))
    try:
        field = db[t][f]
    except AttributeError:
        raise HTTP(404)
    try:
        (filename, stream) = field.retrieve(name, nameonly=True)
    except NotAuthorizedException:
        raise HTTP(403)
    except (NotFoundException, IOError):
        raise HTTP(404)
    return response.stream(stream)

Note that this function could be made a lot simpler but I wanted it to work with uploadseparate=True and to work for any kind of file you want to stream.

Now replace "download" with "stream" in your URL and you're done.

[Gael Princivalle]

Dear Leonel thanks a lot.

I've tried also with stream without success.

<object data="/stream/memos.memo_file.ac5f12657d916e96.456c656e636f5f646f63756d656e74695f63616e7469657265312e706466.pdf#toolbar=1&amp;navpanes=0&amp;scrollbar=1&amp;page=1&amp;view=FitH"

        type="application/pdf"
        width="100%"
        height="100%">

</object>

I've tried also in another website that display pdf files with absolute pdf path, to display a downloaded file without success.

Have you already tried to embed a downloaded pdf file?

[Mark Graves]

I would personally use pdf.js.

Does that meet your needs?

-Mark

[Leonel Câmara]

Yes Gael I tried and that worked for me. I can provide a sample app if you need.

[Gael Princivalle]

Thanks Mark I'll try it.

[Gael Princivalle]

Leonel, if you can send me a sample app it will be really useful, thanks a lot.

[Mark Graves]

https://bitbucket.org/MarkGraves/web2py_pdf_view

Here's a really basic example of pdf.js integration.

Basically, all I did was drop in pdf.js and then return it as a stream via ajax.

-Mark

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[Leonel Câmara]

Here's my test application which is working for me. To test I simply introduced a memo pdf file in appamin.

[Leonel Câmara]

Here's my test application which is working for me. To test I simply introduced a memo pdf file in appadmin.

[Gael Princivalle]

Thanks a lot Leonel. I have integrated the pdf.js like Mark have done (thanks Mark).

I've got some troubles also with pdf.js. With block center in the layout file pdf was not displayed.

{{block center}}
    {{include}}
{{end}}

Without, pdf is displayed.

We talk about a custom grid view.

I've to test it but I can imagine that it's the same with your solution, pdf HTML5 object.

One thing that seems pdf.js do better is displaying pdf on mobile devices. Almost with my Android mobile phone pdf are displayed. With pdf HTML5 object no.

[Gael Princivalle]

I think the best solution is to use the actual version of pdf.js, that offer more functions to the user (zoom...) and perhaps will avoid some incompatibilities. For example pdf files saved by the Windows 10 scan software are not read by the pdf.js version that have used Mark.