Django集成Plaid API报TypeError，请求体处理问题求助

尝试将Django后端与Plaid API集成，卡在请求体返回的问题上。程序尝试向Plaid服务器请求link token失败，报错TypeError: expected string or bytes-like object，核心疑问是：无法访问请求对象时，如何为请求字段返回请求体？认为无法篡改WSGIRequest对象操纵接收的数据，不确定这个认知是否正确。

报错栈追踪信息 #

Request Method: GET
Request URL: http://127.0.0.1:8000/create-link-token

Django Version: 4.0.6
Python Version: 3.9.2
Installed Applications:
['django.contrib.admin',
 'django.contrib.auth',
 'django.contrib.contenttypes',
 'django.contrib.sessions',
 'django.contrib.messages',
 'django.contrib.staticfiles']
Installed Middleware:
['django.middleware.security.SecurityMiddleware',
 'django.contrib.sessions.middleware.SessionMiddleware',
 'django.middleware.common.CommonMiddleware',
 'django.middleware.csrf.CsrfViewMiddleware',
 'django.contrib.auth.middleware.AuthenticationMiddleware',
 'django.contrib.messages.middleware.MessageMiddleware',
 'django.middleware.clickjacking.XFrameOptionsMiddleware']



Traceback (most recent call last):
  File "C:\Python39\lib\site-packages\django\core\handlers\exception.py", line 55, in inner
    response = get_response(request)
  File "C:\Python39\lib\site-packages\django\core\handlers\base.py", line 197, in _get_response
    response = wrapped_callback(request, *callback_args, **callback_kwargs)
  File "C:\Users\Daniel Tshibangu\Desktop\mukadi\plaid-integration\python\backend\app\views.py", line 82, in create_link_token
    response = client.link_token_create(request)
  File "C:\Python39\lib\site-packages\plaid\api_client.py", line 769, in __call__
    return self.callable(self, *args, **kwargs)
  File "C:\Python39\lib\site-packages\plaid\api\plaid_api.py", line 7404, in __link_token_create
    return self.call_with_http_info(**kwargs)
  File "C:\Python39\lib\site-packages\plaid\api_client.py", line 831, in call_with_http_info
    return self.api_client.call_api(
  File "C:\Python39\lib\site-packages\plaid\api_client.py", line 406, in call_api
    return self.__call_api(resource_path, method,
  File "C:\Python39\lib\site-packages\plaid\api_client.py", line 193, in __call_api
    response_data = self.request(
  File "C:\Python39\lib\site-packages\plaid\api_client.py", line 452, in request
    return self.rest_client.POST(url,
  File "C:\Python39\lib\site-packages\plaid\rest.py", line 264, in POST
    return self.request("POST", url,
  File "C:\Python39\lib\site-packages\plaid\rest.py", line 150, in request
    r = self.pool_manager.request(
  File "C:\Python39\lib\site-packages\urllib3\request.py", line 78, in request
    return self.request_encode_body(
  File "C:\Python39\lib\site-packages\urllib3\request.py", line 170, in request_encode_body
    return self.urlopen(method, url, **extra_kw)
  File "C:\Python39\lib\site-packages\urllib3\poolmanager.py", line 376, in urlopen
    response = conn.urlopen(method, u.request_uri, **kw)
  File "C:\Python39\lib\site-packages\urllib3\connectionpool.py", line 703, in urlopen
    httplib_response = self._make_request(
  File "C:\Python39\lib\site-packages\urllib3\connectionpool.py", line 398, in _make_request
    conn.request(method, url, **httplib_request_kw)
  File "C:\Python39\lib\site-packages\urllib3\connection.py", line 239, in request
    super(HTTPConnection, self).request(method, url, body=body, headers=headers)
  File "C:\Python39\lib\http\client.py", line 1255, in request
    self._send_request(method, url, body, headers, encode_chunked)
  File "C:\Python39\lib\http\client.py", line 1296, in _send_request
    self.putheader(hdr, value)
  File "C:\Python39\lib\site-packages\urllib3\connection.py", line 224, in putheader
    _HTTPConnection.putheader(self, header, *values)
  File "C:\Python39\lib\http\client.py", line 1232, in putheader
    if _is_illegal_header_value(values[i]):

Exception Type: TypeError at /create-link-token
Exception Value: expected string or bytes-like object

请求相关检查信息 #

callback            <function create_link_token at 0x000002283648B5E0>
callback_args       ()
callback_kwargs     {}
middleware_method   <bound method CsrfViewMiddleware.process_view of 
                    <CsrfViewMiddleware get_response=convert_exception_to_response. 
                    <locals>.inner>>

request             <WSGIRequest: GET '/create-link-token'>
response            None
self                <django.core.handlers.wsgi.WSGIHandler object at 
                    0x0000022834FF1040>
wrapped_callback    <function create_link_token at 0x000002283648B5E0>

我的代码 #

views.py #

PLAID_CLIENT_ID = os.getenv('PLAID_CLIENT_ID')
PLAID_PUBLIC_KEY = os.getenv('PLAID_PUBLIC_KEY') 
PLAID_SECRET = os.getenv('PLAID_SECRET')
PLAID_ENVIRONMENT = os.getenv('PLAID_ENV', 'development')


configuration = plaid.Configuration(
    host=plaid.Environment.Development,
    api_key = {
        'clientId': PLAID_CLIENT_ID, 
        'secret': PLAID_SECRET,
        'plaidVersion': '2020-09-14',
    }
)

api_client = plaid.ApiClient(configuration)
client = plaid_api.PlaidApi(api_client)

# We store the access_token in memory - in production, store it in a secure
# persistent data store.
access_token = None
# The payment_id is only relevant for the UK Payment Initiation product.
# We store the payment_id in memory - in production, store it in a secure
# persistent data store.
payment_id = None
# The transfer_id is only relevant for Transfer ACH product.
# We store the transfer_id in memomory - in produciton, store it in a secure
# persistent data store
transfer_id = None

item_id = None

def index(request):
    if request.method == 'GET': 
        return True


def create_link_token(request):
    try:
        # Get the client_user_id by searching for the current user
        # Create a link_token for the given user
        request = LinkTokenCreateRequest(
            products=[Products("auth")],
            client_name="Plaid Test App",
            country_codes=[CountryCode('US')],
            language='en',
            user=LinkTokenCreateRequestUser(
                client_user_id=str(time.time())
            )
        )

        response = client.link_token_create(request)
        link_token = response['link_token']
        # Send the data to the client
        return JsonResponse(link_token)
    except plaid.ApiException as e:
        return json.dumps(e.body)

urls.py #

from django.contrib import admin
from django.urls import path
from . import views

urlpatterns = [
    path('admin/', admin.site.urls),
    path('create-link-token', views.create_link_token, name='create-link-token'),
]

内容的提问来源于stack exchange，提问作者workinprogress98