我正在使用Flask来检索使用javascript生成的坐标值。烧瓶代码：
from flask import Flask, request, session, g, redirect, url_for, abort, \
render_template, flash, jsonify
@app.route('/geo', methods= ['GET', 'POST'])
def geo():
return render_template('geo.html')
@app.route('/postmethod', methods = ['GET', 'POST'])
def get_post_location():
where = request.form['location']
return where
控制台日志：
XHR finished loading: POST "http://127.0.0.1:5000/postmethod".
JAVASCRIPT ：
<!DOCTYPE html>
<html>
<head>
<title>Geolocation</title>
<meta charset="utf-8">
<!--jquery-->
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.1.0/jquery.min.js"></script>
<style>
/* Always set the map height explicitly to define the size of the div
* element that contains the map. */
#map {
height: 100%;
}
/* Optional: Makes the sample page fill the window. */
html, body {
height: 100%;
margin: 0;
padding: 0;
}
</style>
</head>
<body>
<div id="map"></div>
<script>
function initMap() {
var pos;
var map = new google.maps.Map(document.getElementById('map'), {
center: {lat: -34.397, lng: 150.644},
zoom: 6
});
var infoWindow = new google.maps.InfoWindow({map: map});
// Try HTML5 geolocation.
if (navigator.geolocation) {
navigator.geolocation.getCurrentPosition(function(position) {
pos = {
lat: position.coords.latitude,
lng: position.coords.longitude
};
console.log(pos)
infoWindow.setPosition(pos);
infoWindow.setContent('You are here.');
map.setCenter(pos);
}, function() {
handleLocationError(true, infoWindow, map.getCenter());
});
$.ajax({
type: "POST",
url: "/postmethod",
// set content type header to use Flask response.get_json()
contentType: "application/json",
// convert data/object to JSON to send
data: JSON.stringify({location: pos}),
// expect JSON data in return (e.g. Flask jsonify)
dataType: "json",
// handle response
success: function(response) {
console.log(response);
},
error: function(err) {
console.log(err);
}
});
} else {
// Browser doesn't support Geolocation
handleLocationError(false, infoWindow, map.getCenter());
}
}
function handleLocationError(browserHasGeolocation, infoWindow, pos) {
infoWindow.setPosition(pos);
infoWindow.setContent(browserHasGeolocation ?
'Error: The Geolocation service failed.' :
'Error: Your browser doesn\'t support geolocation.');
}
</script>
<script async defer
src="https://maps.googleapis.com/maps/api/js?key=AIzaSyBr8V0XkaNFYkNXcP6eJc76b6YutvizwNw&callback=initMap">
</script>
<form action="/postmethod", method="post">
</form>
</body>
</html>
问题：
我该怎么听，所以我可以将where发送给其他一些脚本？
修改
完全追溯（在PJ回答之后我做了get_json(silent=False)
127.0.0.1 - - [19/Mar/2017 23:20:26] "GET /geo HTTP/1.1" 200 -
data: {}
127.0.0.1 - - [19/Mar/2017 23:20:27] "POST /postmethod HTTP/1.1" 500 -
Traceback (most recent call last):
File "/Library/Python/2.7/site-packages/flask/app.py", line 1836, in __call__
return self.wsgi_app(environ, start_response)
File "/Library/Python/2.7/site-packages/flask/app.py", line 1820, in wsgi_app
response = self.make_response(self.handle_exception(e))
File "/Library/Python/2.7/site-packages/flask/app.py", line 1403, in handle_exception
reraise(exc_type, exc_value, tb)
File "/Library/Python/2.7/site-packages/flask/app.py", line 1817, in wsgi_app
response = self.full_dispatch_request()
File "/Library/Python/2.7/site-packages/flask/app.py", line 1477, in full_dispatch_request
rv = self.handle_user_exception(e)
File "/Library/Python/2.7/site-packages/flask/app.py", line 1381, in handle_user_exception
reraise(exc_type, exc_value, tb)
File "/Library/Python/2.7/site-packages/flask/app.py", line 1475, in full_dispatch_request
rv = self.dispatch_request()
File "/Library/Python/2.7/site-packages/flask/app.py", line 1461, in dispatch_request
return self.view_functions[rule.endpoint](**req.view_args)
File "/Users/vitorpatalano/Documents/Code/Apps/App/app/app.py", line 134, in get_post_location
where = data['location']
KeyError: 'location'
答案 0 :(得分：3)
此问题与您将数据从javascript发送到Flask的方式有关。编码的“位置”信息不是字符串值，而是对象或JSON。
所以，你真正希望做的是在Javascript和amp;之间来回发送信息（JSON）。烧瓶
以下是如何实现这一目标。您需要直接使用$.post()方法而不是jQuery $.ajax()方法。
更新：将我的代码更新为本地计算机上的完整工作示例。 $ .ajax（）方法被过早调用...需要将其移动到对地理定位服务的调用范围内。
关于链接和管理异步调用流的另一个问题是Promise库。
<强>的Javascript / HTML：
<!DOCTYPE html>
<html>
<head>
<title>Geolocation</title>
<meta charset="utf-8">
<!--jquery-->
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.1.0/jquery.min.js"></script>
<style>
#map {height: 100%;}
html, body {height: 100%;margin: 0;padding: 0;}
</style>
</head>
<body>
<div id="map"></div>
<script>
function initMap() {
var pos = {},
map = new google.maps.Map(document.getElementById('map'), {
center: {lat: -34.397, lng: 150.644},
zoom: 6
}),
infoWindow = new google.maps.InfoWindow({map: map});
// Try HTML5 geolocation.
if (navigator.geolocation) {
navigator.geolocation.getCurrentPosition(function(position) {
pos = {
lat: position.coords.latitude,
lng: position.coords.longitude
};
infoWindow.setPosition(pos);
infoWindow.setContent('Smells like coffee...');
map.setCenter(pos);
$.ajax({
type: "POST",
url: "/postmethod",
contentType: "application/json",
data: JSON.stringify({location: pos}),
dataType: "json",
success: function(response) {
console.log(response);
},
error: function(err) {
console.log(err);
}
});
}, function() {
handleLocationError(true, infoWindow, map.getCenter());
});
} else {
// Browser doesn't support Geolocation
handleLocationError(false, infoWindow, map.getCenter());
}
}
function handleLocationError(browserHasGeolocation, infoWindow, pos) {
infoWindow.setPosition(pos);
infoWindow.setContent(browserHasGeolocation ?
'Error: The Geolocation service failed.' :
'Error: Your browser doesn\'t support geolocation.');
}
</script>
<script async defer src="https://maps.googleapis.com/maps/api/js?key=AIzaSyBr8V0XkaNFYkNXcP6eJc76b6YutvizwNw&callback=initMap">
</script>
</body>
</html>
在Flask中，您现在可以使用get_json()方法，该方法将重现您在python中使用javascript编码的数据结构。您应该使用Flask jsonify()将响应返回给您的javascript调用。
<强>的Python：
@app.route('/postmethod', methods=['POST'])
def postmethod():
data = request.get_json()
print data
return jsonify(data)