使用 python 中的请求模块连接到 Azure-Datalakes-gen2 时遇到问题

如果你想读取文件内容，你应该使用Read api。

下面的代码在我身边工作：

import requests
import datetime
import hmac
import hashlib
import base64

storage_account_name = 'storage_account_name'
storage_account_key = 'storage_account_key'
api_version = '2018-11-09'
request_time = datetime.datetime.utcnow().strftime('%a, %d %b %Y %H:%M:%S GMT')

#the file path on adls gen2
FILE_SYSTEM_NAME='dd1/11.txt'

string_params = {
    'verb': 'GET',
    'Content-Encoding': '',
    'Content-Language': '',
    'Content-Length': '',
    'Content-MD5': '',
    'Content-Type': '',
    'Date': '',
    'If-Modified-Since': '',
    'If-Match': '',
    'If-None-Match': '',
    'If-Unmodified-Since': '',
    'Range': '',
    'CanonicalizedHeaders': 'x-ms-date:' + request_time + '\nx-ms-version:' + api_version,
    'CanonicalizedResource': '/' + storage_account_name+'/'+FILE_SYSTEM_NAME
    }

string_to_sign = (string_params['verb'] + '\n' 
                  + string_params['Content-Encoding'] + '\n'
                  + string_params['Content-Language'] + '\n'
                  + string_params['Content-Length'] + '\n'
                  + string_params['Content-MD5'] + '\n' 
                  + string_params['Content-Type'] + '\n' 
                  + string_params['Date'] + '\n' 
                  + string_params['If-Modified-Since'] + '\n'
                  + string_params['If-Match'] + '\n'
                  + string_params['If-None-Match'] + '\n'
                  + string_params['If-Unmodified-Since'] + '\n'
                  + string_params['Range'] + '\n'
                  + string_params['CanonicalizedHeaders']+'\n'
                  + string_params['CanonicalizedResource'])

signed_string = base64.b64encode(hmac.new(base64.b64decode(storage_account_key), msg=string_to_sign.encode('utf-8'), digestmod=hashlib.sha256).digest()).decode()
headers = {
    'x-ms-date' : request_time,
    'x-ms-version' : api_version,
    'Authorization' : ('SharedKey ' + storage_account_name + ':' + signed_string)
}
url = ('https://' + storage_account_name + '.dfs.core.windows.net/'+FILE_SYSTEM_NAME)
r = requests.get(url, headers = headers)

#print out the file content
print(r.text)

测试结果：