問(wèn)題描述

這是我現(xiàn)在正在做的事情:

Here's what I'm doing now:

mysock = urllib.urlopen('http://localhost/image.jpg')
fileToSave = mysock.read()
oFile = open(r"C:image.jpg",'wb')
oFile.write(fileToSave)
oFile.close
f=file('image.jpg','rb')
ftp.storbinary('STOR '+os.path.basename('image.jpg'),f)
os.remove('image.jpg')

將文件寫(xiě)入磁盤(pán)然后立即刪除它們似乎是系統(tǒng)上應(yīng)該避免的額外工作.我可以使用 Python 將內(nèi)存中的對(duì)象上傳到 FTP 嗎?

Writing files to disk and then imediately deleting them seems like extra work on the system that should be avoided. Can I upload an object in memory to FTP using Python?

推薦答案

因?yàn)?duck-typing，文件對(duì)象(代碼中的f)只需要支持.read(blocksize)調(diào)用就可以使用storbinary.當(dāng)遇到這樣的問(wèn)題時(shí)，我會(huì)去源頭，在本例中是 lib/python2.6/ftplib.py:

Because of duck-typing, the file object (f in your code) only needs to support the .read(blocksize) call to work with storbinary. When faced with questions like this, I go to the source, in this case lib/python2.6/ftplib.py:

def storbinary(self, cmd, fp, blocksize=8192, callback=None):
    """Store a file in binary mode.  A new port is created for you.

    Args:
      cmd: A STOR command.
      fp: A file-like object with a read(num_bytes) method.
      blocksize: The maximum data size to read from fp and send over
                 the connection at once.  [default: 8192]
      callback: An optional single parameter callable that is called on
                on each block of data after it is sent.  [default: None]

    Returns:
      The response code.
    """
    self.voidcmd('TYPE I')
    conn = self.transfercmd(cmd)
    while 1:
        buf = fp.read(blocksize)
        if not buf: break
        conn.sendall(buf)
        if callback: callback(buf)
    conn.close()
    return self.voidresp()

正如評(píng)論，它只需要一個(gè)類文件對(duì)象，實(shí)際上它甚至不是特別像文件，它只需要 read(n).StringIO 提供了這樣的內(nèi)存文件"服務(wù).

As commented, it only wants a file-like object, indeed it not even be particularly file-like, it just needs read(n). StringIO provides such "memory file" services.

這篇關(guān)于我可以使用 Python 將內(nèi)存中的對(duì)象上傳到 FTP 嗎?的文章就介紹到這了，希望我們推薦的答案對(duì)大家有所幫助，也希望大家多多支持html5模板網(wǎng)！