邮递员能够正确使用 GET 请求，但我的程序不能

Question

我在下面构建了一个 GET 和 PUT 请求：

    from flask import Flask
from flask_restful import Api, Resource, reqparse

app = Flask(__name__)
api = Api(app)

userStorage =[
    {
        "id": "1234",
        "currentBot": "BestBot"
    }
]

class User(Resource):
    def get(self, id):
        for user in userStorage:
            if(id == user["id"]):
                return user, 200
        return "User not found", 404

    def put(self, id):
        parser = reqparse.RequestParser()
        parser.add_argument("currentBot")
        args = parser.parse_args()

        for user in userStorage:
            if(id == user["id"]):
                user["currentBot"] = args["currentBot"]
                return user, 200

        user = {
            "id": id,
            "currentBot": args["currentBot"]
        }
        userStorage.append(user)
        return user, 201

    def delete(self, id):
        global userStorage
        userStorage = [user for user in userStorage if user["id"] != id]
        return "{} is deleted.".format(id), 200

api.add_resource(User, "/user/<string:id>")

app.run(debug = True, port = 4000)

当我执行简单的获取请求时，邮递员可以正确地得到响应 200，但是当我尝试通过自己的程序执行请求时，它会返回 404

import requests

payload2Storage = {
    "currentBot": "BestBot"
}

headers = {"Content-Type": "application/json"}


params = {
    "id": "1234"
}


#response = requests.request("PUT", "http://127.0.0.1:4000/user/", data=payload2Storage, params=params, headers=headers)

response2 = requests.request("GET", "http://127.0.0.1:4000/user/", params=params, headers=headers)

我从 userStorage 获取信息的请求有问题吗？

Answer 1

在客户端代码中，从 127.0.0.1 更改为 localhost 对我有用。试试这个：

response2 = requests.request("GET", "http://localhost:4000/user/", params=params, headers=headers)

或者在服务器代码中，通过主机参数将服务器显式绑定到 127.0.0.1，如下所示：

app.run(debug = True, port = 4000, host='127.0.0.1')

代码中的其他错误是 user["id"] 返回一个 str 而 id 是一个 int，更改代码如下：

def get(self, id):
    for user in userStorage:
        if(id == int(user["id"])):
            return user, 200
    return "User not found", 404