最近在做游戏服务分层的时候,一直想把mysql的访问独立成一个单独的服务DBGate,原因如下:
当然坏处也是有的:
不过总的来说,还是利大于弊,所以最终还是决定搭建DBGate
当然,我们不可能去手工挨个写每个库表对应的restful服务,值得庆幸的是django和flask都提供了对应的解决方案,我们一个个介绍.
Flask
参考链接: flask-restless
flask-restless使用方法比较简单,我直接贴一下代码即可:
# -*- coding: utf-8 -*-
import datetime
from flask import Flask
from flask_sqlalchemy import SQLAlchemy
from flask_restless import APIManager
app = Flask(__name__)
db = SQLAlchemy(app)
restless = APIManager(app, flask_sqlalchemy_db=db)
class User(db.Model):
"""
user
"""
id = db.Column(db.Integer, primary_key=True)
username = db.Column(db.String(255), unique=True, nullable=False)
password = db.Column(db.String(255), nullable=False)
create_time = db.Column(db.DateTime, nullable=False, default=datetime.datetime.utcnow)
login_time = db.Column(db.DateTime)
restless.create_api(User, methods=['GET', 'POST', 'DELETE', 'PATCH', 'PUT'], results_per_page=100)
db.create_all()
if __name__ == '__main__':
app.run(port=25000)
# -*- coding: utf-8 -*-
import datetime
from flask import Flask
from flask_sqlalchemy import SQLAlchemy
from flask_restless import APIManager
app = Flask(__name__)
db = SQLAlchemy(app)
restless = APIManager(app, flask_sqlalchemy_db=db)
class User(db.Model):
"""
user
"""
id = db.Column(db.Integer, primary_key=True)
username = db.Column(db.String(255), unique=True, nullable=False)
password = db.Column(db.String(255), nullable=False)
create_time = db.Column(db.DateTime, nullable=False, default=datetime.datetime.utcnow)
login_time = db.Column(db.DateTime)
restless.create_api(User, methods=['GET', 'POST', 'DELETE', 'PATCH', 'PUT'], results_per_page=100)
db.create_all()
if __name__ == '__main__':
app.run(port=25000)
其对应的restful操作如下:
获取用户列表: GET /user
添加用户: POST /user
获取单个用户: GET /user/1
覆盖单个用户: PUT /user/1
修改单个用户: PATCH /user/1
获取用户列表: GET /user
添加用户: POST /user
获取单个用户: GET /user/1
覆盖单个用户: PUT /user/1
修改单个用户: PATCH /user/1
注意:
Django
参考链接: Django REST framework
Django用起来要更复杂一些,也因为django版自带了一个可视化的操作页面,如下:
1. 在settings中添加:
REST_FRAMEWORK = { # Use hyperlinked styles by default. # Only used if the `serializer_class` attribute is not set on a view. 'DEFAULT_MODEL_SERIALIZER_CLASS': 'rest_framework.serializers.HyperlinkedModelSerializer', # Use Django's standard `django.contrib.auth` permissions, # or allow read-only access for unauthenticated users. 'DEFAULT_PERMISSION_CLASSES': [ #'rest_framework.permissions.DjangoModelPermissionsOrAnonReadOnly', 'rest_framework.permissions.IsAdminUser', ] } REST_FRAMEWORK = { # Use hyperlinked styles by default. # Only used if the `serializer_class` attribute is not set on a view. 'DEFAULT_MODEL_SERIALIZER_CLASS': 'rest_framework.serializers.HyperlinkedModelSerializer', # Use Django's standard `django.contrib.auth` permissions, # or allow read-only access for unauthenticated users. 'DEFAULT_PERMISSION_CLASSES': [ #'rest_framework.permissions.DjangoModelPermissionsOrAnonReadOnly', 'rest_framework.permissions.IsAdminUser', ] }
2. 通过startapp建立一个app: demo
3. 修改demo的models:
class User(models.Model): # key是保留字 password = models.IntegerField() nick = models.CharField(max_length=255) create_time = models.DateTimeField(default=datetime.datetime.now) class User(models.Model): # key是保留字 password = models.IntegerField() nick = models.CharField(max_length=255) create_time = models.DateTimeField(default=datetime.datetime.now)
4. 在demo下新建serializers.py
from rest_framework import serializers
class UserSerializer(serializers.ModelSerializer): class Meta: model = User from rest_framework import serializers from models import User class UserSerializer(serializers.ModelSerializer): class Meta: model = User
from models import User
5. 在demo下修改views.py
from django.shortcuts import render from rest_framework import viewsets from serializers import UserSerializer from models import User class UserViewSet(viewsets.ModelViewSet): queryset = User.objects.all() serializer_class = UserSerializer from django.shortcuts import render from rest_framework import viewsets from serializers import UserSerializer from models import User class UserViewSet(viewsets.ModelViewSet): queryset = User.objects.all() serializer_class = UserSerializer
6. 在demo下新建urls.py
import os.path from django.conf.urls import patterns, include, url from django.conf.urls.static import static from django.conf import settings import views from rest_framework import routers appname = os.path.basename(os.path.dirname(os.path.abspath(__file__))) router = routers.DefaultRouter() router.register('users', views.UserViewSet, appname) urlpatterns = patterns('', url(r'^', include(router.urls)), ) import os.path from django.conf.urls import patterns, include, url from django.conf.urls.static import static from django.conf import settings import views from rest_framework import routers appname = os.path.basename(os.path.dirname(os.path.abspath(__file__))) router = routers.DefaultRouter() router.register('users', views.UserViewSet, appname) urlpatterns = patterns('', url(r'^', include(router.urls)), )
7. 在mysite.urls下include demo.urls和rest_framework.urls
urlpatterns = patterns('', url(r'^demo/', include('demo.urls')), url(r'^admin/', include(admin.site.urls)), url(r'^api-auth/', include('rest_framework.urls', namespace='rest_framework')) ) urlpatterns = patterns('', url(r'^demo/', include('demo.urls')), url(r'^admin/', include(admin.site.urls)), url(r'^api-auth/', include('rest_framework.urls', namespace='rest_framework')) )
8. 执行初始化数据操作:
python manage.py syncdb python manage.py syncdb
之后访问: http://127.0.0.1:8000/demo 即可看到如下界面了:
对应的测试代码如下:
import json import requests from urlparse import urljoin BASE_URL = 'http://127.0.0.1:16500/' AUTH = ('admin', 'admin') def test_get_user_list(): rsp = requests.get(urljoin(BASE_URL, '/demo/users/'), auth=AUTH, headers={ 'Accept': 'application/json' }) assert rsp.ok def test_post_user_list(): json_data = dict( password=0, nick='oo', create_time='2014-03-3T03:3:3' ) rsp = requests.post(urljoin(BASE_URL, '/demo/users/'), auth=AUTH, headers={ 'Accept': 'application/json', 'Content-Type': 'application/json', }, data=json.dumps(json_data)) assert rsp.ok def test_get_user(): rsp = requests.get(urljoin(BASE_URL, '/demo/users/1'), auth=AUTH, headers={ 'Accept': 'application/json', 'Content-Type': 'application/json', }) assert rsp.ok def test_put_user(): json_data = dict( password=100, nick='xx', create_time='2014-03-3T03:3:3' ) # 注意最后的 / rsp = requests.put(urljoin(BASE_URL, '/demo/users/1/'), auth=AUTH, headers={ 'Accept': 'application/json', 'Content-Type': 'application/json', }, data=json.dumps(json_data), ) assert rsp.ok, rsp.status_code
Django REST framework 是严格区分PUT和PATCH的,这一点和flask-restless 不一样,需要注意。
OK,就这样。
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