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  • 用python 实现上传文件功能

    环境 Apache + mod_python

    如文件小可以采用这个方式

    import os

    def form():
       return """\
    <html><body>
    <form enctype="multipart/form-data" action="./upload" method="post">
    <p>File: <input type="file" name="file"></p>
    <p><input type="submit" value="Upload"></p>
    </form>
    </body></html>
    """

    def upload(req):
      
       try: # Windows needs stdio set for binary mode.
          import msvcrt
          msvcrt.setmode (0, os.O_BINARY) # stdin  = 0
          msvcrt.setmode (1, os.O_BINARY) # stdout = 1
       except ImportError:
          pass

       # A nested FieldStorage instance holds the file
       fileitem = req.form['file']

       # Test if the file was uploaded
       if fileitem.filename:

          # strip leading path from file name to avoid directory traversal attacks
          fname = os.path.basename(fileitem.filename)
          # build absolute path to files directory
          dir_path = os.path.join(os.path.dirname(req.filename), 'files')
          open(os.path.join(dir_path, fname), 'wb').write(fileitem.file.read())
          message = 'The file "%s" was uploaded successfully' % fname

       else:
          message = 'No file was uploaded'
      
       return """\
    <html><body>
    <p>%s</p>
    <p><a href="./form">Upload another file</a></p>
    </body></html>
    """ % message


    如文件大时,可以分块上传,现在是改良方式

    import os

    def form():
       return """\
    <html><body>
    <form enctype="multipart/form-data" action="./upload" method="post">
    <p>File: <input type="file" name="file"></p>
    <p><input type="submit" value="Upload"></p>
    </form>
    </body></html>
    """

    # Generator to buffer file chunks
    def fbuffer(f, chunk_size=10000):
       while True:
          chunk = f.read(chunk_size)
          if not chunk: break
          yield chunk

    def upload(req):
      
       try: # Windows needs stdio set for binary mode.
          import msvcrt
          msvcrt.setmode (0, os.O_BINARY) # stdin  = 0
          msvcrt.setmode (1, os.O_BINARY) # stdout = 1
       except ImportError:
          pass

       # A nested FieldStorage instance holds the file
       fileitem = req.form['file']

       # Test if the file was uploaded
       if fileitem.filename:

          # strip leading path from file name to avoid directory traversal attacks
          fname = os.path.basename(fileitem.filename)
          # build absolute path to files directory
          dir_path = os.path.join(os.path.dirname(req.filename), 'files')
          f = open(os.path.join(dir_path, fname), 'wb', 10000)

          # Read the file in chunks
          for chunk in fbuffer(fileitem.file):
             f.write(chunk)
          f.close()
          message = 'The file "%s" was uploaded successfully' % fname

       else:
          message = 'No file was uploaded'
      
       return """\
    <html><body>
    <p>%s</p>
    <p><a href="./form">Upload another file</a></p>
    </body></html>
    """ % message



    from:http://long.objectis.net/wanglaoriji/yongpython-shixianshangzhuanwenjiangongneng

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  • 原文地址:https://www.cnblogs.com/dkblog/p/1980646.html
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