问题
I've written some python code to download an image using
urllib.urlopen().read()
and then upload it to an FTP site using
ftplib.FTP().storbinary()
but I'm having a problem. Sometimes the image file is only partially uploaded, so I get images with the bottom 20% or so cut off. I've checked the locally downloaded version and I have successfully downloaded the entire image, which leads me to believe that it is a problem with storbinary. I believe I am opening and closing all of the files correctly. Does anyone have any clues as to why I'm getting a partial upload with storbinary?
Update: When I run through the commands in the Python shell, the upload completes successfully, I don't know why it would be different from when run as a script...
回答1:
It turns out I was not closing the downloaded file correctly. Let's all pretend this never happened.
回答2:
It's been a while since I looked at this code, but I remember the crux of it was that I was not closing the downloaded file correctly. I have the working code though, so just in case it was a problem with the upload and not the download, here are both snippets:
Here is the working code to download the image:
socket = urllib.urlopen(TheURL)
FileContents = socket.read()
LocalFilename = LocalDir + FilenameOnly
LocalFile = open(LocalDir + FilenameOnly, 'wb')
LocalFile.write(FileContents)
LocalFile.close()
Where TheURL is the URL of the file I'm trying to download, FilenameOnly is just the filename portion of the path, and LocalDir is the local destination. I believe my problem was that I was not calling LocalFile.close().
Here is the working code to upload the image:
FTPServer = ftplib.FTP(FTPServer, FTPUsername, FTPPassword)
UploadFile = open(Filename, "rb")
FTPServer.cwd(FTPSubDirectory)
UploadFile.close()
FTPServer.quit()
The problem could also have been that I was not calling FTPServer.quit()
If anyone has any questions about this code, I'll happily reply in the comments; I feel really bad that I left any Googlers hanging!
来源：https://stackoverflow.com/questions/670084/partial-upload-with-storbinary-in-python