for 3. you may find some reference here https://developer.mozilla.org/en-US/docs/Web/API/FileReader?redirectlocale=en-US&redirectslug=DOM%2FFileReader#readAsBinaryString()
2013/10/12 Michele Comitini <[email protected]> > I do not understand exactly what the code does, but here is what I would > try: > 1. Don't use GET use a POST > 2. Use a binary post see: > https://developer.mozilla.org/en-US/docs/Web/API/XMLHttpRequest/Sending_and_Receiving_Binary_Data > 3. use binary strings in javascript > 4. use a bjson library > > > 2013/10/12 Ruud Schroen <[email protected]> > >> >> Hi. I posted a topic earlier about html2canvas to db. Now i got a new >> issue so i figured i'd start a new thread. >> >> html2canvas takes a screenshot of all the content inside a div and >> creates a canvas which acts as the image. After that the canvas is >> converted to a base64 code. I send this code a web2py function via JSON. >> When that is done i want to decrypt the base64 string and upload the image >> to a db. >> >> This is my javascript and web2py code: >> >> <script type="text/javascript"> >>> >>> html2canvas(document.getElementById('wireframe'), { >>> >>> onrendered: function(canvas) { >>> >>> var url = >>>> '{{=URL(f="update",args=request.args,vars=request.vars)}}'; >>> >>> var data = canvas.toDataURL("image/png"); >>> >>> $.ajax({ >>> >>> url: url, >>> >>> type: "GET", >>> >>> data: {'data':data}, >>> >>> datatype: 'json', >>> >>> success: function (html) { >>> >>> $('#results').html(html); >>> >>> } >>> >>> }); >>> >>> return false; >>> >>> } >>> >>> }); >>> >>> </script> >>> >>> >> def update(): >> >> from io import BytesIO >> >> from PIL import Image >> >> import base64 >> >> image = request.vars.data[request.vars.data.find(",")+1:] >> >> im = Image.open(BytesIO(base64.b64decode(image))) >> >> return db.wireframe.insert(screenshot=image) >> >> >> The base64 code reaches the function, but when i insert the decrypted >> code into the db, it says "Cannot handle upload". What am i doing wrong? >> >> This is an example of the file path WITHOUT the decryption (taken from >> succeeded db insert): >> >> >> http://localhost: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 >> >> -- >> Resources: >> - http://web2py.com >> - http://web2py.com/book (Documentation) >> - http://github.com/web2py/web2py (Source code) >> - https://code.google.com/p/web2py/issues/list (Report Issues) >> --- >> You received this message because you are subscribed to the Google Groups >> "web2py-users" group. >> To unsubscribe from this group and stop receiving emails from it, send an >> email to [email protected]. >> For more options, visit https://groups.google.com/groups/opt_out. >> > > -- Resources: - http://web2py.com - http://web2py.com/book (Documentation) - http://github.com/web2py/web2py (Source code) - https://code.google.com/p/web2py/issues/list (Report Issues) --- You received this message because you are subscribed to the Google Groups "web2py-users" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/groups/opt_out.
