通过Flask发送POST数据 [英] Sending POST Data through Flask
问题描述
我试图让一些JavaScript运行一个函数来更新一个合理的大型json字典的表单输入的值，然后我想在我的瓶子后端得到它的持有。所以我有下面的HTML和JavaScript：
< head>
<！ - 这里有一些信息 - >
< script>
函数AddPostData（）{
var data = editor.getValue（）;
//这个editor.getValue（）获取json字符串，它正在工作
//通过提示信息验证
var formInfo = document.forms ['json_form' ]。
formInfo.elements [json_data]。value = data;
alert（data）
}
< / script>
< / head>
< body>
<！ - 我在这里有json编辑GUI - >
< form id =json_formmethod =POSTaction =/ test>
< input type =hiddenname =json_datavalue =/>
< input type =submitvalue =Submitonclick =AddPostData（）;>
< / form>
然后这里是我用于Flask的Python。
@ app.route（'/ test'，methods = ['GET'，'POST']）
def test（）：
如果request.method =='POST'：
print（request.data）
the_json = request.data
＃这个模板简单地打印出来，所有我得到的是b
return render_template（'testing.html'，the_json = the_json）
？当我将一个字符串硬编码到数据变量中时，我仍然没有在request.data字段中得到任何东西，那么确切的说，我得到ab后面跟着一个引号：b
我想这是错误的，因为它实际上并没有将json放入输入的值字段中。
< pre $ the_json = request.form.get（'json_data'，None）
而不是
the_json = requ est.data
将在硬编码部分工作（当然，但我不太确定如果你的Java脚本工作/不是我的专业领域，但它看起来没问题。）。
I am trying to have some javascript that runs a function to update the value of a form input with a reasonably large json dictionary and then I want to get a hold of it on my flask backend. So I have the follow HTML and javascript:
<head>
<!--some info here -->
<script>
function AddPostData() {
var data = editor.getValue();
//this editor.getValue() gets the json string and it is working
//as validated by an alert message
var formInfo = document.forms['json_form'];
formInfo.elements["json_data"].value = data;
alert(data)
}
</script>
</head>
<body>
<!-- I have the json editing GUI here -->
<form id="json_form" method="POST" action="/test">
<input type="hidden" name="json_data" value="" />
<input type="submit" value="Submit" onclick="AddPostData();">
</form>
And then here is the python that I have for Flask.
@app.route('/test', methods=['GET', 'POST'])
def test():
if request.method == 'POST':
print (request.data)
the_json=request.data
#this template simply prints it out and all that I get is b"
return render_template('testing.html', the_json=the_json)
Any ideas what is going wrong? When I hardcode a string into the data variable I still don't get anything in the request.data field. Well to be exact I get a b followed by one quotation: b"
I suppose it is something wrong in that it isn't actually putting the json into the value field of the input.
the_json = request.form.get('json_data', None)
instead of
the_json=request.data
will work in the hard coded section (for sure, but I'm not too sure if your java script works/not my area of expertise but it looks ok.).
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