Python烧瓶：Route vs add_url_rule，SSE

Question

使用add_url_rule失败，但@ app.route（''）正常工作。

你好，我想添加SSE（服务器发送事件）到Python Flask应用程序。不幸的是，该应用使用SOMEOBJECT.app.add_url_rule来管理路由，所以在这种情况下使用装饰器不适用于我。

from flask import Flask, Response 
import random 
import time 

app = Flask(__name__) 
def eventStream(): 
    # will send simple SSE style responses 
    while True: 
     waittt = random.random() 
     time.sleep(waittt) 
     yield "data: {}\n\n".format(str(waittt)) 
# This route works fine :) 
@app.route("/streamroute") 
def stream(): 
    return Response(eventStream(), mimetype="text/event-stream") 

# This route doesn't work :(
app.add_url_rule("/stream", stream) 
app.run(debug=True) 

OK curl http://localhost:5000/streamroute

KO curl http://localhost:5000/stream

Answer 1

from flask import Flask, Response            
import random                 
import time                  

app = Flask(__name__)               
def eventStream():                
    # will send simple SSE style responses          
    while True:                 
     waittt = random.random()            
     time.sleep(waittt)              
     yield "data: {}\n\n".format(str(waittt))        
# This route works fine :)              
@app.route('/streamroute')              
def stream():                 
    return Response(eventStream(), mimetype="text/event-stream")    

# This route doesn't work :(             
app.add_url_rule('/stream', 'stream', stream)         
app.run(debug=True)  

请参见下面的文档中，正确的语法是：

app.add_url_rule('/stream', 'stream', stream)   

更多：http://flask.pocoo.org/docs/0.10/api/#flask.Flask.add_url_rule