HTTP 400 on payout

Question

我一直在尝试为我的网站建立Paypal套现系统，我浏览了无数的Paypal API页面，并将所有的例子翻译成Python：

import requests
import string
import random
import json
from requests.auth import HTTPBasicAuth

class makePayment(object):
    def __init__(self, paypal_email, subject, amount, note, clientid, secret):
        self.access_token = self.obtain_access_token(clientid, secret) # Successfully obtained access token
        self.headers = {"Content-type": "application/json", "Authorization": "Bearer {0}".format(self.access_token)}
        self.sender_batch_id = self.generate_sender_batch_id() # Randomly generated sender_batch_id in base36 ([A-Z] and [1-9])
        self.payout_form = self.create_payout_form(self.sender_batch_id, paypal_email, subject, amount, note) # Not encoded in JSON, just normal HTML form
        self.response = requests.post("https://api.sandbox.paypal.com/v1/payments/payouts",
                                      data=self.payout_json,
                                      headers=self.headers)

    def httpResponse(self):
        return self.response

    @staticmethod
    def obtain_access_token(clientid, secret):
        headers = {"Accept": "application/json", "Accept-Language": "en_US"}
        response = requests.post("https://api.sandbox.paypal.com/v1/oauth2/token",
                                 auth=HTTPBasicAuth(clientid, secret),
                                 data={"grant_type": "client_credentials"},
                                 headers=headers)
        return dict(response.json()).get("access_token")

    @staticmethod
    def generate_sender_batch_id():
        base36 = str(string.digits + string.ascii_lowercase)
        return "".join([random.choice(base36) for char in range(1, 9)])

    @staticmethod
    def create_payout_form(sender_batch_id, paypal_email, subject, amount, note):
        payout_dict = {
            'sender_batch_header': {
                    'sender_batch_id': sender_batch_id,
                    'email_subject': subject,
            },
            'items': [{
                'recipient_type': 'EMAIL',
                'amount': {
                    'value': amount,
                    'currency': 'USD'
                },
                'receiver': paypal_email,
                'note': note,
                'sender_item_id': '${0} item'.format(amount),
            }]
        }
        return payout_dict

token generator，payout example

我得到了http错误400 (错误的请求)，在此之前，我尝试过在json中编码数据，得到http错误422 (无法处理的实体)，也许json编码是正确的方法？

请注意，sender_batch_id是随机生成的，因为我不知道获得它的任何其他方法。

我做错了什么？有没有可能我遗漏了一些参数？我认为身份验证头有一些问题。谢谢!

Answer 1

大多数来自"application/ json“类型的times POST请求都需要以json格式发送：

 response = requests.post("https://api.sandbox.paypal.com/v1/oauth2/token",
                             auth=HTTPBasicAuth(clientid, secret),
                             json={"grant_type": "client_credentials"},
                             headers=headers)

我用过

json

而不是

data 

在您的POST请求中