Python：从请求库到urllib3的转换

Question

我需要将以下CURL命令转换为Python中的http请求：

curl -X POST https://some/url
-H 'api-key: {api_key}'
-H 'Content-Type: application/json'
-H 'Accept: application/json'
-d '{ "data": { "dirname": "{dirname}", "basename": "{filename}", "contentType": "application/octet-stream" } }'

我最初使用Python的请求库成功地实现了请求

import requests

url = 'https://some/url'
api_key = ...
dirname = ...
filename = ...

headers = {
    'api-key': f'{api_key}',
    'Content-Type': 'application/json',
    'Accept': 'application/json',
}

payload = json.dumps({
    'data': {
        'dirname': f'{dirname}',
        'basename': f'{filename}',
        'contentType': 'application/octet-stream'
    }
})

response = requests.post(url, headers=headers, data=payload)

客户后来要求不要使用pip安装请求库。为此，我尝试使用urllib3库，如下所示：

import urllib3

url = 'https://some/url'
api_key = ...
dirname = ...
filename = ...

headers = {
    'api-key': f'{api_key}',
    'Content-Type': 'application/json',
    'Accept': 'application/json',
}

payload = json.dumps({
    'data': {
        'dirname': f'{dirname}',
        'basename': f'{filename}',
        'contentType': 'application/octet-stream'
    }
})

http = urllib3.PoolManager()
response = http.request('POST', url, headers=headers, body=payload)

问题是，现在请求返回一个错误400，我不明白为什么

Answer 1

在作为参数传递之前，请尝试在payload上调用.encode('utf-8')

或者，尝试将负载作为fields传递，而不手动将其转换为JSON：

payload = {
  'data': {
    'dirname': f'{dirname}',
    'basename': f'{filename}',
    'contentType': 'application/octet-stream'
  }
}
http = urllib3.PoolManager()
response = http.request('POST', url, headers=headers, fields=payload)