Programming Forums > Script Programming > Python

Sane · Dec 23rd, 2005, 1:15 AM

Okay, for uploading files. I checked under recipes/file uploads on the cherrypy.org website. The current code is for the last version of cherrypy. I did my best to translate it by changing cpg to cherrypy, etc...

But it didn't work. It froze on the cgi.FileStorage line. So I looked at the "What's New!" logs. But the "File Upload Behaviour" link is grey and incomplete.

Any ideas how to translate the file upload code to the newest version?

I backtracked and tried taking the results of a file submit html form, and converting the last string from hex to decimal. But data was lost and it becomes corrupt. Ascii transfers = bad.

Arevos · Dec 23rd, 2005, 5:01 AM

Could you post up the code you have to handle file uploads? Also, try searching through the cherrypy users mailing list. That usually has a lot of good advice in.

Sane · Dec 23rd, 2005, 11:23 AM

My current code, although highly stupid using splits() and ascii transfers.

This function takes image as a result of the file input type from an html form.

(Toggle Plain Text)

        strimage = str(image)
        imagen = strimage.split("'")[3]
        imaged = strimage[27+len(imagen):-2]
        
        if imagen:
            if not (imagen.upper()).endswith('JPG') or (imagen.upper()).endswith('GIF'):
                res = "Only JPG or GIF is accepted."
           
        if res:
            return redirect("%seditprofile?error=%s"%(self.domain, res))

        if imagen:
            f = open('avatars/%s.JPG'%(userID), 'wb')
            f.write(self.hex_to_dec(imaged))
            f.close()

(Toggle Plain Text)

    def hex_to_dec(self, hexkey):
        hexset = {'0':0,'1':1,'2':2,'3':3,'4':4,'5':5,'6':6,'7':7,'8':8,'9':9,'a':10,'b':11,'c':12,'d':13,'e':14,'f':15}

        y = ''
        l1 = False
        l2 = False
        l3 = False
        
        for c in hexkey:
            if c == chr(92):
                l1 = True
            elif l1 and c == 'x':
                l1 = False
                l2 = True
            elif l2:
                l2 = False
                l3 = True
                num1 = hexset[c]
            elif l3:
                l3 = False
                num2 = hexset[c]
                y += chr(num2*16+num1)
            else:
                l1 = False
                y += c
        return y

Some of the characters became corrupted and look different then the ascii in the original file.

I'll check out the mailing list.

EDIT:
HOLY CRAP. I think I found my mistake...
I multiplied the second number by 16, not the first!!! :mad:

Grr.... didn't work. It's still corrupted, but at least it draws it on the screen this time... http://jammersbase.gotdns.com/viewprofile?userID=1

The two files aren't very different at all actually...

Quote:

Originally Posted by Before

�� JFIF ` ` �� C

$.' ",#(7)

Quote:

Originally Posted by After

�� JFIF ` ` �� C ttnr $.' ",#(7)

Arevos · Dec 23rd, 2005, 1:17 PM

This works for me:

(Toggle Plain Text)

import cherrypy

class HelloWorld:
    @cherrypy.expose
    def index(self):
        return """
            <html><body>
                <form action="upload" method="post" enctype="multipart/form-data">
                filename: <input type="file" name="avatar"/><br/>
                <input type="submit"/>
                </form>
            </body></html>
        """

    @cherrypy.expose
    def upload(self, avatar):
        output = open("avatars/" + avatar.filename, 'wb')
        output.write(avatar.file.read())
        output.close()
        
        return """
            <html><body>
                Uploaded %s.
            </body></html>
            """ % avatar.filename
        
cherrypy.root = HelloWorld()
cherrypy.config.update(file = "config")
cherrypy.server.start()

Does it for you?

Sane · Dec 23rd, 2005, 1:53 PM

".file.read()"

OMG AHHH... MAKES SO MUCH SENSE!!!

Thanks man!! I guess splitting the string converts it to hex, this leaves it alone. Wow yay!

Arevos · Dec 23rd, 2005, 2:06 PM

Quote:

Originally Posted by Sane

OMG AHHH... MAKES SO MUCH SENSE!!!

Often the way

They really ought to update the CherryPy site. Nice framework, but they're really behind on the documentation

By the way, if you ever need to convert an binary to ascii and back again, check out the base64 module, and base64.b64encode and base64.b64decode.

Sane · Dec 24th, 2005, 1:15 AM

Check out the result of your help Arevos in the Completed Projects Section.

Dec 23rd, 2005, 1:15 AM	#1
Sane Programming Guru Join Date: Apr 2005 Location: Waterloo, Ontario Posts: 1,835 Rep Power: 5	PyCherry Help? Okay, for uploading files. I checked under recipes/file uploads on the cherrypy.org website. The current code is for the last version of cherrypy. I did my best to translate it by changing cpg to cherrypy, etc... But it didn't work. It froze on the cgi.FileStorage line. So I looked at the "What's New!" logs. But the "File Upload Behaviour" link is grey and incomplete. Any ideas how to translate the file upload code to the newest version? I backtracked and tried taking the results of a file submit html form, and converting the last string from hex to decimal. But data was lost and it becomes corrupt. Ascii transfers = bad.

Dec 23rd, 2005, 1:17 PM	#4
Arevos Programming Guru Join Date: Aug 2005 Location: England Posts: 1,499 Rep Power: 5	This works for me: (Toggle Plain Text) import cherrypy class HelloWorld: @cherrypy.expose def index(self): return """ <html><body> <form action="upload" method="post" enctype="multipart/form-data"> filename: <input type="file" name="avatar"/><br/> <input type="submit"/> </form> </body></html> """ @cherrypy.expose def upload(self, avatar): output = open("avatars/" + avatar.filename, 'wb') output.write(avatar.file.read()) output.close() return """ <html><body> Uploaded %s. </body></html> """ % avatar.filename cherrypy.root = HelloWorld() cherrypy.config.update(file = "config") cherrypy.server.start() import cherrypy class HelloWorld: @cherrypy.expose def index(self): return """ <html><body> <form action="upload" method="post" enctype="multipart/form-data"> filename: <input type="file" name="avatar"/><br/> <input type="submit"/> </form> </body></html> """ @cherrypy.expose def upload(self, avatar): output = open("avatars/" + avatar.filename, 'wb') output.write(avatar.file.read()) output.close() return """ <html><body> Uploaded %s. </body></html> """ % avatar.filename cherrypy.root = HelloWorld() cherrypy.config.update(file = "config") cherrypy.server.start() Does it for you? Last edited by Arevos; Dec 23rd, 2005 at 1:30 PM.

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Dec 23rd, 2005, 5:01 AM	#2
Arevos Programming Guru Join Date: Aug 2005 Location: England Posts: 1,499 Rep Power: 5	Could you post up the code you have to handle file uploads? Also, try searching through the cherrypy users mailing list. That usually has a lot of good advice in.

Dec 23rd, 2005, 1:53 PM	#5
Sane Programming Guru Join Date: Apr 2005 Location: Waterloo, Ontario Posts: 1,835 Rep Power: 5	".file.read()" OMG AHHH... MAKES SO MUCH SENSE!!! Thanks man!! I guess splitting the string converts it to hex, this leaves it alone. Wow yay!

Dec 24th, 2005, 1:15 AM	#7
Sane Programming Guru Join Date: Apr 2005 Location: Waterloo, Ontario Posts: 1,835 Rep Power: 5	Check out the result of your help Arevos in the Completed Projects Section.

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Programming Forums > Script Programming > Python

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