Flask快速入门(20) — 多app应用 _快速

丈夫欲遂平生志，一载寒窗一举汤。这篇文章主要讲述Flask快速入门(20) — 多app应用相关的知识，希望能为你提供帮助。
Flask快速入门(20) — 多app应用之前一直是一个app，如果有多个app该怎么进行分发呢？

from werkzeug.wsgi import DispatcherMiddleware from werkzeug.serving import run_simple from flask import Flask,current_app# 注册两个app app1 = Flask(' app01' ) app2 = Flask(' app02' )@app1.route(' /index' ) def index(): return ' app01' @app2.route(' /index' ) def index(): return ' app02' dm = DispatcherMiddleware(app1,{ ' /sec' :app2, }) if __name__ == ' __main__' : run_simple(' localhost' ,5000,dm)

【Flask快速入门(20) — 多app应用】dm是DispatcherMiddleware实例化对象，所以dm()调用时执行的是__call__方法。源码：

# dm = DispatcherMiddleware(app1,{' /sec' :app2})def __init__(self, app, mounts=None): self.app = app self.mounts = mounts or {}def __call__(self, environ, start_response): script = environ.get(" PATH_INFO" , " " )# 获取url信息，如url为http://127.0.0.1:5000/sec/index; 此时获取到的script为‘/sec/index’ path_info = " " while " /" in script: # 此时 self.mounts = {' /sec' :app2} if script in self.mounts: app = self.mounts[script] breakscript, last_item = script.rsplit(" /" , 1)# 循环从右边以/切分1次，给script重新赋值 path_info = " /%s%s" % (last_item, path_info) else: # 如果没有匹配上，app = app1，如果匹配上了app = self.mounts[script] 即app2 app = self.mounts.get(script, self.app)original_script_name = environ.get(" SCRIPT_NAME" , " " ) environ[" SCRIPT_NAME" ] = original_script_name + script environ[" PATH_INFO" ] = path_info return app(environ, start_response)