如何使用参数和POST方法重定向到外部url？

Question

我想在提交到flask中的操作url之前保存表单数据

<form action="" method="POST">
    <input type="hidden" name="PAYEE_ACCOUNT" value="U1234567">
    <input type="hidden" name="PAYEE_NAME" value="Name">
    <input type="text"   name="PAYMENT_AMOUNT">
    <input type="submit" name="PAYMENT_METHOD" />
</form>

我可以提交此表单，但我希望在提交之前保存表单数据

视图：

@mod.route('/payment/', methods=['GET', 'POST'])
def payment():
    if request.method != "POST":
        return render_template('form.html')

    form = request.form

    form_data = {'PAYEE_ACCOUNT': form['PAYEE_ACCOUNT'],
                 'PAYEE_NAME': form['PAYEE_Name'],
                 'PAYMENT_AMOUNT' : form['PAYMENT_AMOUNT']
                 }

    # Save Data

    import urllib
    params = urllib.urlencode(form_data)

    url = 'http://www.example.com'
    return redirect(url, params)

请帮帮我

Answer 1

发送307状态代码（而不是302）应该告诉浏览器保留使用的HTTP方法，从而获得预期的行为。然后，您的重定向调用将如下所示：

@mod.route('/payment/', methods=['GET', 'POST'])
def payment():
    if request.method != "POST":
        return render_template('form.html')

    form = request.form

    form_data = {'PAYEE_ACCOUNT': form['PAYEE_ACCOUNT'],
                 'PAYEE_NAME': form['PAYEE_Name'],
                 'PAYMENT_AMOUNT' : form['PAYMENT_AMOUNT']
                 }

    # Save Data

    url = 'http://www.example.com'
    return redirect(url, code=307)

Answer 2

你需要使用烧瓶重定向

烧瓶重定向（位置，代码=302）

Return a response object (a WSGI application) that, if called, redirects the client to the target location. Supported codes are 301, 302, 303, 305, and 307. 300 is not supported because it’s not a real redirect and 304 because it’s the answer for a request with a request with defined If-Modified-Since headers.

Parameters:
location – the location the response should redirect to. code – the redirect status code. defaults to 302.

示例代码：

import os
from flask import Flask,redirect

app = Flask(__name__)

@app.route('/')
def hello():
    return redirect("http://www.example.com", code=302)

if __name__ == '__main__':
    # Bind to PORT if defined, otherwise default to 5000.
    port = int(os.environ.get('PORT', 5000))
    app.run(host='0.0.0.0', port=port)

见the documentation on flask docs。

Answer 3

我已经用JavaScript解决了这个问题。

首先，将数据发送到服务器。

JavaScript代码：

<script type="text/javascript">
  var $SCRIPT_ROOT = {{ request.script_root|tojson|safe }};

  $(function() {
    $('#PAYMENT_METHOD').bind('click', function() {
      $.getJSON($SCRIPT_ROOT +'/credit/save_transaction', {
        PAYMENT_ID: $('input[name="PAYMENT_ID"]').val(),
        PAYMENT_AMOUNT: $('input[name="PAYMENT_AMOUNT"]').val(),
        SUGGESTED_MEMO: $('input[name="SUGGESTED_MEMO"]').val()
      }, function(data) {
         if (data.result == 'ok') {
            $('#form_payment').submit();
         }
      });
      return false;
    });
  });
</script>

然后，保存数据并返回结果。

视图代码：

@mod.route('/save_transaction', methods=['GET', 'POST'])
def save_transaction():
    follow_num = request.args.get('PAYMENT_ID')
    amount = request.args.get('PAYMENT_AMOUNT')
    memo = request.args.get('SUGGESTED_MEMO')

    #Save Data

    return jsonify(result='ok')