微信小程序-drf登录认证组件

- 通过全局的用户判断是否登录
- 登录用户则校验用户的token值

1. config - settings.js

	- api.js
	- settings.js

# 模块化：登录页面路由
module.exports = {
  loginPage: "/pages/login/login"
}

2. utils - auth.js

	- auth.js

# 获取应用实例
var settings = require('../config/settings.js')
var app = getApp()

function authentication() {
  if (!app.globalData.userInfo) {
	wx.navigateTo({
	// settings.loginPage,登录路由
	  url: settings.loginPage
	})
	return false
  }
  return true
}

# 认证函数模块化
module.exports = {
  authentication: authentication
}

3. 示例：用户评论

pages
	- newsDetail
		- newsDetail.js
		
// pages/newsDetail/newsDetail.js

var api = require("../../config/api.js")
var auth = require('../../utils/auth.js')
var app = getApp()

# 评论之前判断用户是否登录
onClickShowCommentModal: function(e) {
  if (!auth.authentication()) {
    return
  }
  var replyInfo = e.currentTarget.dataset;
  this.setData({
    isShowCommentModal: true,
    reply: replyInfo,
  });
},

4. 提交评论-- 用户已登录，发送请求携带token值

'''
# 请求头携带用户的token值，此处涉及到js的三元运算
header: {
    Authorization: userInfo ? "token " + userInfo.token : ""
  },
'''

onClickPostComment: function() {
// 发布评论，将评论数据发送到后台接口
var userInfo = app.globalData.userInfo;
wx.request({
  url: api.Comment,
  data: this.data.reply,
  method: 'POST',
  dataType: 'json',
  header: {
    Authorization: userInfo ? "token " + userInfo.token : ""
  },
  responseType: 'text',
  success: (res) => {
    ...
  }
  })
  }

5. 后端校验 token值是否一致

utils
	- auth.py

'''
如果用户已登录，则在request.user和request.auth中赋值；未登录则做任何操作。
用户需要在请求头Authorization中传递token，格式如下：
    Authorization: token 401f7ac837da42b97f613d789819ff93537bee6a

建议：配合和配置文件一起使用，未认证的用户request.user和request.auth的值为None

REST_FRAMEWORK = {
    "UNAUTHENTICATED_USER":None,
    "UNAUTHENTICATED_TOKEN":None
}
'''

通用认证

#!/usr/bin/env python
# -*- coding:utf-8 -*-
from rest_framework.authentication import BaseAuthentication
from rest_framework.authentication import get_authorization_header
from apps.api import models
from rest_framework import exceptions

class GeneralAuthentication(BaseAuthentication):

	""" 
	通用认证（所有页面都可以应用）
	"""
	
	keyword = "token"

	def authenticate(self, request):
	
		# 认证元组
		auth_tuple = get_authorization_header(request).split()

		# 1.如果没有传token，则通过本次认证，进行之后的认证
		if not auth_tuple:
			return None

		# 2.如果传递token，格式不符，则通过本次认证，进行之后的认证
		if len(auth_tuple) != 2:
			return None

		# 3.如果传递了token，但token的名称不符，则通过本次认证，进行之后的认证
		if auth_tuple[0].lower() != self.keyword.lower().encode():
			return None

		# 4.对token进行认证，如果通过了则给request.user和request.auth赋值，否则返回None
		try:
			token = auth_tuple[1].decode()
			user_object = models.UserInfo.objects.get(token=token)
			return (user_object, token)
		except Exception as e:
			return None

用户认证

class UserAuthentication(BaseAuthentication):

	"""
	token 认证
	"""
	
	keyword = "token"

	def authenticate(self, request):
		auth_tuple = get_authorization_header(request).split()
		
		'''
		print(auth_tuple)
		auth_tuple = [b'token', b'a33409078e8ff69c16e813442ac1ce5d']
		'''

		if not auth_tuple:
			raise exceptions.AuthenticationFailed('认证失败')

		if len(auth_tuple) != 2:
			raise exceptions.AuthenticationFailed('认证失败')

		if auth_tuple[0].lower() != self.keyword.lower().encode():
			raise exceptions.AuthenticationFailed('认证失败')
		try:
			token = auth_tuple[1].decode()
			user_object = models.UserInfo.objects.get(token=token)
			return (user_object, token)
		except Exception as e:
			raise exceptions.AuthenticationFailed('认证失败')

视图函数添加认证类 --评论

from utils.auth import UserAuthentication, GeneralAuthentication

class CommentView(CreateAPIView, ListAPIView):

	'''
	POST请求提交评论：用户认证类
	'''
	serializer_class = CommentModelSerializer
	queryset = models.CommentRecord.objects

	filter_backends = [ChildCommentFilter, ]

	def get_authenticators(self):
		if self.request.method == 'POST':
			return [UserAuthentication(), ]
		return [GeneralAuthentication(), ]