如何在Flask中获取表单数据？

Question

我需要从表单中获取数据.

我使用JavaScript来创建表单:

<script>   
function checkAuth() {
                var user = ADAL.getCachedUser();
                if (user) {
                    var form = $('<form style="position: absolute; width: 0; height: 0; opacity: 0; display: none; visibility: hidden;" method="POST" action= "{{ url_for("general.microsoft") }}">');

                    form.append('<input type="hidden" name="token" value="' + ADAL.getCachedToken(ADAL.config.clientId) + '">');
                    form.append('<input type="hidden" name="json" value="' + encodeURIComponent(JSON.stringify(user)) + '">');
                    $("body").append(form);
                    form.submit();
                }
            }
</script> 

然后我需要从输入字段中获取数据name="json".

这是我的视图功能:

@general.route("/microsoft/", methods=["GET", "POST"])
@csrf.exempt
def microsoft():
    form = cgi.FieldStorage()
    name = form['json'].value
    return name

但是我收到一个错误:

builtins.KeyError KeyError: 'json'

帮我从表格中获取数据.

Answer 1

从Flask的请求对象获取表单数据:

from flask import Flask, request
app = Flask(__name__)

@app.route('/', methods=['GET', 'POST'])
def index():
    data = request.form['input_name']
    ...

您还可以设置默认值以避免400错误,如下所示:

from flask import Flask, request
app = Flask(__name__)

@app.route('/', methods=['GET', 'POST'])
def index():
    default_name = '0'
    data = request.form.get('input_name', default_name)
    ...