UnicodeDecodeError:“utf-8”编解码器在0位置无法解码字节0xff:无效的开始字节

I am trying to scrap a picture from the link and put it into a image file. The request response is returning a byte stream. So I am using decode('utf-8') to convert to unicode stream however, I am facing the following error:

我正在尝试从链接中删除一张图片并将它放入一个图像文件中。请求响应返回一个字节流。因此，我正在使用decode(‘utf-8’)将其转换为unicode流，但我面临以下错误:

print (info.decode(('utf-8')))

print(info.decode((utf - 8)))

UnicodeDecodeError: 'utf-8' codec can't decode byte 0xff in position 0: invalid start byte

UnicodeDecodeError:“utf-8”编解码器在0位置无法解码字节0xff:无效的开始字节

    from urllib import request
    img = request.urlopen('http://www.py4inf.com/cover.jpg')
    fhand = open('cover.jpg', 'w')
    size = 0
    while True:
        info = img.read(100000)
        if len(info) < 1 : break
        size = size + len(info)
        print (info.decode(('utf-8')))
        fhand.write(info.decode(('utf-8')))

    print (size,'characters copied.')
    fhand.close()

Please let me know how can I proceed. Thanks.

请告诉我该如何进行。谢谢。

2 个解决方案

#1

The file should be opened in binary mode and then you can copy the stream byte for byte. Since shutil already has a handy helper utility, you can

该文件应该以二进制模式打开，然后您可以将流字节复制到字节。因为shutil已经有了一个方便的助手实用程序，所以您可以这样做

import shutil
import os
from urllib import request

img = request.urlopen('http://www.py4inf.com/cover.jpg')
with open('cover.jpg', 'wb') as fhand:
    shutil.copyfileobj(img, fhand)
print(os.stat('cover.jpg').st_size, 'characters copied')

#2

Don't use Unicode transformations for JPG images.

不要为JPG图像使用Unicode转换。

Unicode is for text. What you are downloading is not text, it is something else.

Unicode文本。你下载的不是文本，而是别的东西。

Try this:

试试这个:

from urllib import request
img = request.urlopen('http://www.py4inf.com/cover.jpg')
fhand = open('cover.jpg', 'wb')
size = 0
while True:
    info = img.read(100000)
    if len(info) < 1 : break
    size = size + len(info)
    fhand.write(info)

print (size,'characters copied.')

Or, more simply:

或者,更简单:

from urllib import request
request.urlretrieve('http://www.py4inf.com/cover.jpg', 'cover.jpg')