我想为S3对象生成一个签名URL，其下载文件名包含®，但是会引发错误：
content_disposition = u'attachment; filename={}'.format(upload.filename)
url = conn.generate_url(
EXPIRES_IN,
'GET',
S3_PROTECTED_BUCKET_NAME,
upload.file_key,
response_headers = {
'response-content-type': content_type,
'response-content-disposition': content_disposition
})
令人讨厌的字符串代表是：
u'attachment; filename=Rita-PMP\xae Exam Prep 8th Edition - Rita Mulcahy.png'用
print可以。它引发以下错误：
File "/usr/local/lib/python2.7/dist-packages/django/core/handlers/base.py" in get_response
111. response = wrapped_callback(request, *callback_args, **callback_kwargs)
File "/usr/local/lib/python2.7/dist-packages/django/contrib/auth/decorators.py" in _wrapped_view
22. return view_func(request, *args, **kwargs)
File "/home/likewise-open/SUYATITECH/jjvattamattom/dev/force4change/projectapp/views.py" in show
203. attachment.file_key = signed_download_url(attachment)
File "/home/likewise-open/SUYATITECH/jjvattamattom/dev/force4change/baseapp/uploads.py" in signed_download_url
69. 'response-content-disposition': content_disposition
File "/usr/local/lib/python2.7/dist-packages/boto/s3/connection.py" in generate_url
399. extra_qp.append("%s=%s" % (k, urllib.parse.quote(v)))
File "/usr/lib/python2.7/urllib.py" in quote
1288. return ''.join(map(quoter, s))
Exception Type: KeyError at /projects/show/50
Exception Value: u'\xae'
当符号很容易为ASCII时，为什么会引发此错误？
更新：传递编码的字节字符串也不起作用：
content_disposition = 'attachment; filename={}'.format(upload.filename.encode('utf-8'))
给我：
Traceback:
File "/usr/local/lib/python2.7/dist-packages/django/core/handlers/base.py" in get_response
111. response = wrapped_callback(request, *callback_args, **callback_kwargs)
File "/usr/local/lib/python2.7/dist-packages/django/contrib/auth/decorators.py" in _wrapped_view
22. return view_func(request, *args, **kwargs)
File "/home/likewise-open/SUYATITECH/jjvattamattom/dev/force4change/projectapp/views.py" in show
203. attachment.file_key = signed_download_url(attachment)
File "/home/likewise-open/SUYATITECH/jjvattamattom/dev/force4change/baseapp/uploads.py" in signed_download_url
69. 'response-content-disposition': content_disposition
File "/usr/local/lib/python2.7/dist-packages/boto/s3/connection.py" in generate_url
407. b64_hmac = self._auth_handler.sign_string(c_string)
File "/usr/local/lib/python2.7/dist-packages/boto/auth.py" in sign_string
91. new_hmac.update(string_to_sign.encode('utf-8'))
Exception Type: UnicodeDecodeError at /projects/show/50
Exception Value: 'ascii' codec can't decode byte 0xc2 in position 130: ordinal not in range(128)
最佳答案
在将content-disposition标头传递给generate_url之前，您应该对其进行编码（urllib在unicode中不起作用）：
>>> content_disposition = u'attachment filename=Rita-PMP\xae Exam Prep 8th Edition - Rita Mulcahy.png'
>>> urllib.quote(content_disposition)
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "/usr/lib/python2.7/urllib.py", line 1288, in quote
return ''.join(map(quoter, s))
KeyError: u'\xae'
>>> urllib.quote(content_disposition.encode('utf-8'))
'attachment%20filename%3DRita-PMP%C2%AE%20Exam%20Prep%208th%20Edition%20-%20Rita%20Mulcahy.png'
关于python - 带有S3的KeyError u'\xae'generate_url，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/28581135/