File Upload Recipe
Problem
File uploads can be a little tricky if you're not familiar with form uploads, or CGI in general.
Solution
import web
urls = ('/upload', 'Upload')
class Upload:
def GET(self):
return """<html><head></head><body>
<form method="POST" enctype="multipart/form-data" action="">
<input type="file" name="myfile" />
<br/>
<input type="submit" />
</form>
</body></html>"""
def POST(self):
x = web.input(myfile={})
web.debug(x['myfile'].value) # This is the file contents
web.debug(x['myfile'].filename) # This is the filename
web.redirect('/upload')
app = web.application(urls, globals())
if __name__ == "__main__":
app.run()
Hang ups
A couple of things to watch out for:
- The form needs an attribute enctype="multipart/form-data", or this won't work correctly.
- In the webpy code, a default value is needed (the myfile={} part) if you want it to be imported as a CGI FieldStorage object. If you don't specify the default value, the file will be passed as a string -- this works, but you lose the filename attribute.