POST 请求的 Flask 404

Question

我是 Flask 的新手。尝试构建一个 flask 应用程序，它从后端 neo4j 获取数据并 post 以 JSON 格式存储它。最终目标是使用 d3.js 进行可视化。但是对于初学者来说，我想 post 它作为 JSON.

下面是我的views.py:

import models
from models import Customer
from flask import Flask, request, session, redirect, url_for, render_template, flash,json,jsonify
import os
app = Flask(__name__)
@app.route('/',methods = ['GET','POST'])
def enter_ID():
    if request.method == 'POST':
         Galactic_ID = request.form['Galactic_ID']
         if Customer(Galactic_ID).find():
            return redirect(url_for('Customer_relationships',Galactic_ID=request.form.get('Galactic_ID')))
         else:
             return  "Wrong Galactic_ID"

     else:
         return render_template('Gal.html')

@app.route('/Customer_relationships/<Galactic_ID>')
def Customer_relationships(Galactic_ID):
    data = Customer(Galactic_ID).get_relationships():
    return render_template('rel.html',Galactic_ID=Galactic_ID,data =json.dumps(data))



if __name__ == '__main__':
    host = os.getenv('IP','0.0.0.0')
    port = int(os.getenv('PORT',5000))
    app.secret_key = os.urandom(24)
    app.run(host=host,port=port)

在 views.py 中，Customer(Galactic_ID).find() 和 Customer(Galactic_ID).get_relationships() 调用函数 find(self) 和 get_relationships(self) 在 models.py 中的客户 class 下：

当我尝试运行以下是 HTTP 调用：

127.0.0.1 - - [29/Jul/2016 17:54:53] "GET / HTTP/1.1" 200 -
127.0.0.1 - - [29/Jul/2016 17:54:56] "POST / HTTP/1.1" 302 -
127.0.0.1 - - [29/Jul/2016 17:54:56] "GET  /Customer_relationships/2000000000084001287 HTTP/1.1" 200 -
127.0.0.1 - - [29/Jul/2016 17:54:56] "POST /Customer_relationships HTTP/1.1" 404 -

Answer 1

以下是有效的解决方案：

import models
from models import Customer
from flask import Flask, request, session, redirect, url_for, render_template, flash,json,jsonify
import os
app = Flask(__name__)
@app.route('/',methods = ['GET','POST'])
def enter_ID():
    if request.method == 'POST':
        Galactic_ID = request.form['Galactic_ID']
        if Customer(Galactic_ID).find():
            return redirect(url_for('relationships',ID=request.form.get('Galactic_ID')))
        else:
            return "Wrong Galactic_ID"

   else:
       return render_template('Gal.html')
@app.route('/Customer_relationships',defaults={'ID':'Galactic_ID'},methods=['GET','POST'])
@app.route('/Customer_relationships/<ID>',methods=['GET','POST'])
def relationships(ID):
    data = Customer(ID).get_relationships()
    return  render_template('rel.html',data= json.dumps(data))





if __name__ == '__main__':
    host = os.getenv('IP','0.0.0.0')
    port = int(os.getenv('PORT',5000))
    app.secret_key = os.urandom(24)
    app.run(host=host,port=port)

Answer 2

我有一个类似的问题，已通过 flask-cors 模块解决。

首先需要在终端安装$ pip install flask-cors

然后添加到您的应用：

from flask import Flask
from flask_cors import CORS

app = Flask(__name__)
CORS(app)

@app.route("/", methods=['POST'])
def helloWorld():
  return "Hello, cross-origin-world!"

POST 请求的 Flask 404

Flask 404 for POST request

json

ajax

flask

py2neo