简单的flask应用服务器通过ajax和jquery传递数据 [英] simple flask app server passing data with ajax and jquery
问题描述
我整天都在修改这个应用程序，试图将一些简单的信息传递到应用程序的后端.我正在使用一个简单的flask应用程序，并尝试使用ajax将数据从搜索查询发送到后端.但是，我已经完全失败了.任何帮助将不胜感激.
I've spent all day tinkering with this app trying to get some simple information passed to the back end of the application. I am using a simple flask app and trying to send data from a search query to the back end using ajax. However, I have been completely unsuccessful. Any help would be greatly appreciated.
下面是app.py
from scraper import scrape
from flask import Flask, render_template, jsonify, make_response, request
import json
app = Flask(__name__)
@app.route("/")
def index():
entries = json.dumps(scrape("video games"))
return render_template('index.html', entries= entries)
@app.route('/parse_data', methods=['GET', 'POST'])
def parse_data():
if request.method == "GET":
#data = request.form("blah")
#print("blah")
search = request.json
#new_search = json.dumps(scrape(data))
return search
return render_template('index.html')
if __name__ == "__main__":
app.run(debug=True, host='0.0.0.0', port=5000)
和index.html
and index.html
<!DOCTYPE html>
<html>
<head>
<title>Flask app</title>
<link rel="stylesheet" href="{{ url_for('static', filename='css/main.css') }}">
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.1.0/jquery.min.js"></script>
</head>
<body>
<div class="topnav">
<a class="active" href="#home">Home</a>
<a href="#about">About</a>
<a href="#contact">Contact</a>
<form name = "textbox" id = "textbox">
<input id ="textbox" name="textbox" type="text" placeholder="Search..">
<button type="submit">submit</button>
</form>
</div>
<p>you searched: {{search}} </p>
<div id="div1">
<p id="p1"></p>
<p id="p2"></p>
</div>
<script>
var value = $('.textbox').val();
//alert(value);
$.ajax({
type: 'POST',
url: "/parse_data",
data: JSON.stringify(value)
contentType: 'application/json',
success: function(data){
alert("success")
}
});
var jsonz = {{ entries|tojson }};
var s = JSON.parse(jsonz);
var i;
for (i = 0; i < s.length; i++) {
var para = document.createElement("p");
var node = document.createTextNode(s[i].product_name + "\n" + s[i].product_link);
para.appendChild(node);
var element = document.getElementById("div1");
element.appendChild(para);
}
//document.getElementById("user").innerHTML =
//obj;
//"Name: " + obj.product_name + "<br>" +
//"Location: " + obj.product_link;
</script>
</body>
</html>
推荐答案
您的代码段存在一些问题，主要是:
Your code snippet has a few issues, mostly:
- 您的AJAX请求未绑定到按钮单击事件，因此单击按钮不会执行任何操作.
- 您有两个具有相同id
文本框的html元素，id应该是唯一的. - 要通过id获取html元素，请使用
#textbox"
- Your AJAX request is not bind to the button click event, so clicking the button does nothing.
- You have two html elements with the same id
textbox, id are supposed to be unique. - To get an html element by id use
"#textbox"
在服务器端(烧瓶):
- 使用请求的功能
get_json() - 要处理
POST请求，您需要检查POST而不是GET
- Use the function
get_json()of the request - To process the
POSTrequest you need to check forPOSTnotGET
尝试像这样包装您的POST请求:
Try wrapping your POST request like this:
$("button").click(function (e) {
e.preventDefault();
var value = $("#textbox").val();
alert(value);
$.ajax({
type: "POST",
url: "parse_data",
data: JSON.stringify({ "text" : value } ),
contentType: "application/json; charset=utf-8",
dataType: "json",
success: function (data) {
alert(JSON.stringify(data));
}
});
});
还删除重复的ids textbox ，将表单的id更改为 textbox-form ，最后将您的 parse_data 函数更改为像这样的东西:
Also remove the duplicate ids textbox, change the id of the form to something like textbox-form, finally change your parse_data function to something like this:
@app.route('/parse_data', methods=['GET', 'POST'])
def parse_data():
if request.method == 'POST':
search = request.get_json()
return jsonify(search)
return render_template('index.html')
这篇关于简单的flask应用服务器通过ajax和jquery传递数据的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
