我尝试做的是从文本框向服务器发送值。然后在字典中搜索此值并将结果放在 div 中。例如，如果我的词典是d = {'a': "1", 'b': "2", 'c': "3"}而我得到了＃34; a＆＃34;从文本框中它应该在div中写入2。但是找不到该值并返回默认结果。问题是什么？它可能是一些愚蠢的东西，但我无法找到它。这是我的代码：
from flask import Flask, render_template, request
app = Flask(__name__)
d = {'a': "1", 'b': "2", 'c': "3"}
@app.route("/", methods=['GET', 'POST'])
def index():
return render_template('index.html')
@app.route("/demo_test", methods=['GET', 'POST'])
def demo():
if request.method == "POST":
data = request.data
print "dict: {}".format(d) # I can access the dict from here
print "res {}".format(d.get("b", "meh")) #get() is working with a string. Returns "2"
print "request data: {} type: {}".format(data, type(data)) # I'm receiving data without problems
ndata = d.get(data, "meh") # For example if I receive "b" the result is "meh". It should be "2"
print "ndata: {} type: {}".format(ndata, type(ndata))
return ndata
if __name__ == "__main__":
app.run(debug=True)
<!DOCTYPE html>
<html>
<head>
<script type=text/javascript
src="http://ajax.googleapis.com/ajax/libs/jquery/1.4.2/jquery.min.js"></script>
</head>
<body>
<form action="" method="POST">
<input type="text" id="selector" name="selector">
</form>
<div id="div1"></div>
<script type="text/javascript">
$('#selector').change(function () {
var value = $('#selector').val()
$.ajax({
type : "POST",
url : "{{ url_for('demo') }}",
data: JSON.stringify(value),
contentType: 'text/plain',
success: function(result) {
$('#div1').html(result)
}
});
});
</script>
</body>
</html>
答案 0 :(得分：2)
您正在发送 JSON 字符串;这包括报价。因此，您尝试查找'"b"'，而不是'b'：
>>> import json
>>> json.dumps('b')
'"b"'
最好告诉服务器你发布JSON并在服务器端加载数据：
$.ajax({
type : "POST",
url : "{{ url_for('demo') }}",
data: JSON.stringify({'key': value}),
contentType: 'application/json',
success: function(result) {
$('#div1').html(result)
}
});
并在服务器端：
if request.method == "POST":
data = request.get_json()
ndata = d.get(data['key'], "meh")
return ndata