requests.exceptions.ConnectionError: HTTPConnectionPool(host='127.0.0.1', port=8000): 最大重试次数超过 url: /api/1/

Question

我正在尝试在Django和Python文件之间进行通信，但出现以下错误：

requests.exceptions.ConnectionError: HTTPConnectionPool(host='127.0.0.1', port=8000): Max retries exceeded with url: /api/1/ (Caused by NewConnectionError(': Failed to build a new connection: [WinError 10061]无法建立连接，因为目标机器主动拒绝它'))

我创建了一个名为test.pyIn a Djangoapp的 Python 文件并尝试在它们之间进行通信。我的Python 文件包含以下代码：

import requests
BASE_URL='http://127.0.0.1:8000/'
ENDPOINT='api/'
def get_resource(id):
    resp=requests.get(BASE_URL+ENDPOINT+id+'/')
    print(resp.status_code)
    print(resp.json()) 
id=input("Enter some ID: ")
get_resource(id)

Models.py 包含：-

from django.db import models

# Create your models here.
class Employee(models.Model):
    eno=models.IntegerField()
    ename=models.CharField(max_length=70)
    esal=models.FloatField()
    eaddr=models.CharField(max_length=100)

Admin.py 包含：-

from django.contrib import admin
from testapp.models import Employee
# Register your models here.
class EmployeeAdmin(admin.ModelAdmin):
    list_display=  ['id','eno','ename','esal','eaddr']

admin.site.register(Employee,EmployeeAdmin)

我的Views.py包含：-

from django.shortcuts import render
from django.views.generic import View
from testapp.models import Employee
import json
from django.http import HttpResponse


class EmployeeDetailCBV(View):
def get(self,request,id,*args,**kwargs):
    emp = Employee.objects.get(id=id)  
    emp_data = {'eno':emp.eno , 'ename':emp.ename , 'esal':emp.esal , 'eaddr':emp.eaddr} 
    json_data=json.dumps(emp_data)
    return HttpResponse(json_data , content_type='application/json')

urls.py 文件包含：-

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

urlpatterns = [
    path('admin/', admin.site.urls),
    path('api/(?P<id>\d+)/$', views.EmployeeDetailCBV.as_view()),
]

得到错误，如：

requests.exceptions.ConnectionError: HTTPConnectionPool(host='127.0.0.1', port=8000): Max retries exceeded with url: /api/1/ (Caused by NewConnectionError(': Failed to build a new connection: [WinError 10061]无法建立连接，因为目标机器主动拒绝它'))

请帮我。谢谢各位技术....

Answer 1

我明白了失败背后的真正原因。我只从 1 个终端运行 py test.py 来访问 python 文件。当时服务器尚未运行，因此无法进行通信。然后我打开一个单独的终端并运行开发服务器，现在我的 Python 文件能够与 Django 文件进行通信。现在运行良好。

Answer 2

尝试这个 ：

import requests

# BASE_URL='http://127.0.0.8000' <<< Url with port malformed
BASE_URL='http://127.0.0.1:8000'
ENDPOINT='api/'
def get_resource():
    # resp=requests.get(BASE_URL+ENDPOINT)  <<< Request url malformed
    resp=requests.get(BASE_URL+"/"+ENDPOINT)
    print(resp.status_code)
    print(resp.json())
get_resource()