如何将数据从 Google App Engine(Python) 传递到 Flex 4 应用程序

发布于 2024-08-23 05:36:55 字数 5172 浏览 5 评论 0原文

我在应用程序引擎中使用 python 和 webapp 框架作为后端，使用 flex 4 作为前端。我想将字符串形式后端传递到前端，所以我在 main.py 中编写以下代码：

class MainPage(webapp.RequestHandler):

 def get(self):

  userVO = "test"

  template_values = {
   'url': self.request.uri,
   'userVO': userVO,

  }
  self.response.out.write(template.render("templates/index.html", template_values))

在 Flex 4 中，我有以下代码：

var user:String = FlexGlobals.topLevelApplication.parameters['userVO'];

但是，我收到空值。

请指教如何纠正。谢谢。

编辑：2 月 25 日

感谢回答我问题的人。对于我的问题，我试图弄清楚Python应用程序引擎在渲染包含swf文件的html文件时如何将数据传递给flex应用程序。也许，我可以在 main.py、swfobject.js 或 index.html 中设置一些东西来完成我的任务。

我知道如何使用 Pyamf 作为网关来服务 Flex 应用程序，我正在考虑如何使应用程序更简单。

谢谢。

编辑：2月28日

Robert，index.html是flash builder 4创建的标准文件。希望你能给我一些如何修改它的提示。以下是该文件：

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<!-- saved from url=(0014)about:internet -->  

<html xmlns="http://www.w3.org/1999/xhtml" lang="en" xml:lang="en"> 
<!-- 
Smart developers always View Source. 

This application was built using Adobe Flex, an open source framework
for building rich Internet applications that get delivered via the
Flash Player or to desktops via Adobe AIR. 

Learn more about Flex at http://flex.org 
// -->
   <head>
   <title></title>         
    <meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1" />

html, 正文 { 高度:100%; } 正文 { 边距：0;填充：0；溢出：隐藏；文本对齐：居中； }
#flashContent { 显示：无； }

    <script type="text/javascript" src="/js/swfobject.js"></script>
    <script type="text/javascript">
        <!-- For version detection, set to min. required Flash Player version, or 0 (or 0.0.0), for no version detection. --> 
        var swfVersionStr = "10.0.0";
        <!-- To use express install, set to playerProductInstall.swf, otherwise the empty string. -->
        var xiSwfUrlStr = "/swfs/playerProductInstall.swf";
        var flashvars = {};
        var params = {};
        params.quality = "high";
        params.bgcolor = "#ffffff";
        params.allowscriptaccess = "sameDomain";
        var attributes = {};
        attributes.id = "index";
        attributes.name = "index";
        attributes.align = "middle";
        swfobject.embedSWF(
            "/swfs/index.swf", "flashContent", 
            "100%", "100%", 
            swfVersionStr, xiSwfUrlStr, 
            flashvars, params, attributes);

swfobject.createCSS("#flashContent", "显示:块;文本对齐:左;");

要查看此页面，请确保 Adobe Flash Player 版本安装了 10.0.0 或更高版本。

    <noscript>
        <object classid="clsid:D27CDB6E-AE6D-11cf-96B8-444553540000" width="100%" height="100%" id="index">
            <param name="movie" value="index.swf" />
            <param name="quality" value="high" />
            <param name="bgcolor" value="#ffffff" />
            <param name="allowScriptAccess" value="sameDomain" />
            <!--[if !IE]>
            <object type="application/x-shockwave-flash" data="index.swf" width="100%" height="100%">
                <param name="quality" value="high" />
                <param name="bgcolor" value="#ffffff" />
                <param name="allowScriptAccess" value="sameDomain" />
            <![endif]-->
            <!--[if gte IE 6]>
             <p> 
              Either scripts and active content are not permitted to run or Adobe Flash Player version
              10.0.0 or greater is not installed.
             </p>
            <![endif]-->
                <a href="http://www.adobe.com/go/getflashplayer">
                    <img src="https://www.adobe.com/images/shared/download_buttons/get_flash_player.gif" alt="Get Adobe Flash Player" />
                </a>
            <!--[if !IE]>
            </object>
            <![endif]-->
        </object>
 </noscript>

谢谢，罗伯特。

编辑：3 月 7 日

Robert，

请参阅 http://help.adobe.com/en_US/Flex/4.0/html/WS2db454920e96a9e51e63e3d11c0bf626ae-7feb.html

在我在这里发布问题之前，我尝试了以下代码：

在index.html中，

<%
     String user = (String) request.getParameter("userVO");
%>

并且还

flashvars.userVO =  "<%= user %>";

结果，我得到：

< user

你知道为什么我无法获取正确的数据吗？谢谢。

原文

I am using python and webapp framework in app engine for backend and flex 4 for front end.
I would like to pass a string form backend to front end, so i write the following code in the main.py:

class MainPage(webapp.RequestHandler):

 def get(self):

  userVO = "test"

  template_values = {
   'url': self.request.uri,
   'userVO': userVO,

  }
  self.response.out.write(template.render("templates/index.html", template_values))

And in the flex 4, I have the following code:

var user:String = FlexGlobals.topLevelApplication.parameters['userVO'];

However, I receive null value.

Please advice how to correct it. Thanks.

Edit: 25 Feb.

Thanks for the people who answer my question. For my question, I am try to figure out how the python app engine pass data to flex app when it render the html file that include the swf file. Maybe, there is something I can set in the main.py, swfobject.js or the index.html to do my task.

I know how to use Pyamf as a gateway to serve the flex app, I am thinking how to make the app more simple.

Thanks.

Edit: 28 Feb.

Robert, the index.html is the standard file created by flash builder 4. Wish you can give me some hints how to modify it. The following is the file:

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<!-- saved from url=(0014)about:internet -->  

<html xmlns="http://www.w3.org/1999/xhtml" lang="en" xml:lang="en"> 
<!-- 
Smart developers always View Source. 

This application was built using Adobe Flex, an open source framework
for building rich Internet applications that get delivered via the
Flash Player or to desktops via Adobe AIR. 

Learn more about Flex at http://flex.org 
// -->
   <head>
   <title></title>         
    <meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1" />

html, body { height:100%; }
body { margin:0; padding:0; overflow:hidden; text-align:center; }
#flashContent { display:none; }

    <script type="text/javascript" src="/js/swfobject.js"></script>
    <script type="text/javascript">
        <!-- For version detection, set to min. required Flash Player version, or 0 (or 0.0.0), for no version detection. --> 
        var swfVersionStr = "10.0.0";
        <!-- To use express install, set to playerProductInstall.swf, otherwise the empty string. -->
        var xiSwfUrlStr = "/swfs/playerProductInstall.swf";
        var flashvars = {};
        var params = {};
        params.quality = "high";
        params.bgcolor = "#ffffff";
        params.allowscriptaccess = "sameDomain";
        var attributes = {};
        attributes.id = "index";
        attributes.name = "index";
        attributes.align = "middle";
        swfobject.embedSWF(
            "/swfs/index.swf", "flashContent", 
            "100%", "100%", 
            swfVersionStr, xiSwfUrlStr, 
            flashvars, params, attributes);

swfobject.createCSS("#flashContent", "display:block;text-align:left;");

To view this page ensure that Adobe Flash Player version
10.0.0 or greater is installed.

    <noscript>
        <object classid="clsid:D27CDB6E-AE6D-11cf-96B8-444553540000" width="100%" height="100%" id="index">
            <param name="movie" value="index.swf" />
            <param name="quality" value="high" />
            <param name="bgcolor" value="#ffffff" />
            <param name="allowScriptAccess" value="sameDomain" />
            <!--[if !IE]>
            <object type="application/x-shockwave-flash" data="index.swf" width="100%" height="100%">
                <param name="quality" value="high" />
                <param name="bgcolor" value="#ffffff" />
                <param name="allowScriptAccess" value="sameDomain" />
            <![endif]-->
            <!--[if gte IE 6]>
             <p> 
              Either scripts and active content are not permitted to run or Adobe Flash Player version
              10.0.0 or greater is not installed.
             </p>
            <![endif]-->
                <a href="http://www.adobe.com/go/getflashplayer">
                    <img src="https://www.adobe.com/images/shared/download_buttons/get_flash_player.gif" alt="Get Adobe Flash Player" />
                </a>
            <!--[if !IE]>
            </object>
            <![endif]-->
        </object>
 </noscript>

Thanks, Robert.

Edit: 7 Mar.

Robert,

Refer to http://help.adobe.com/en_US/Flex/4.0/html/WS2db454920e96a9e51e63e3d11c0bf626ae-7feb.html

Before I post the question here, I tried the following code:

In the index.html,

<%
     String user = (String) request.getParameter("userVO");
%>

and also

flashvars.userVO =  "<%= user %>";

The result, I get:

< user

Do you know why I can't get the correct data. Thanks.

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请持续率性 2024-08-30 05:36:55

从 Flex 与 GAE 对话的最佳方式是使用 AMF。方法如下：

app.yaml

application: flexandthecloud
version: 3
runtime: python
api_version: 1

handlers:
- url: /services/.*
  script: main.py

main.py

#!/usr/bin/env python
import wsgiref.handlers

from pyamf.remoting.gateway.wsgi import WSGIGateway

def sayHello(name):
  return "howdy " + name

services = {
    'services.sayHello': sayHello
}

def main():
  application = WSGIGateway(services)
  wsgiref.handlers.CGIHandler().run(application)

if __name__ == '__main__':
  main()

Flex 3 代码（可以轻松修改为 Flex 4）：

<?xml version="1.0" encoding="utf-8"?>
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml">

    <mx:RemoteObject id="ro" destination="services" endpoint="http://flexandthecloud.appspot.com/services/">
        <mx:result>
            l.text = event.result as String;
        </mx:result>
    </mx:RemoteObject>

    <mx:TextInput id="ti"/>
    <mx:Label id="l"/>
    <mx:Button label="say hello" click="ro.sayHello(ti.text)"/>

</mx:Application>

The best way to talk from Flex to GAE is using AMF. Here is how:

app.yaml

application: flexandthecloud
version: 3
runtime: python
api_version: 1

handlers:
- url: /services/.*
  script: main.py

main.py

#!/usr/bin/env python
import wsgiref.handlers

from pyamf.remoting.gateway.wsgi import WSGIGateway

def sayHello(name):
  return "howdy " + name

services = {
    'services.sayHello': sayHello
}

def main():
  application = WSGIGateway(services)
  wsgiref.handlers.CGIHandler().run(application)

if __name__ == '__main__':
  main()

Flex 3 code (can be easily modified for Flex 4):

<?xml version="1.0" encoding="utf-8"?>
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml">

    <mx:RemoteObject id="ro" destination="services" endpoint="http://flexandthecloud.appspot.com/services/">
        <mx:result>
            l.text = event.result as String;
        </mx:result>
    </mx:RemoteObject>

    <mx:TextInput id="ti"/>
    <mx:Label id="l"/>
    <mx:Button label="say hello" click="ro.sayHello(ti.text)"/>

</mx:Application>

回复收藏 0 原文

想你只要分分秒秒 2024-08-30 05:36:55

根据您对 James Ward 回复的评论，我想知道您是否可以使用 FlashVars param 元素来完成您需要的功能？

http://livedocs.adobe.com/flex/ 3/html/help.html?content=passingarguments_3.html

您可能只需要调整index.html 模板即可构建FlashVars param 元素。

编辑：3 月 6 日

您可以尝试查看：
http://polygeek.com/801_flex_reading-flashvars-in-flex

您需要请务必等到应用程序加载后才能访问 flashVars。

编辑：3 月 7 日

正确，在这些示例中，他们对值进行了硬编码。您需要编辑模板，以便将值设置为模板参数的值。

所以，在index.html中：
flashvars.userVO = "{{ userVO }}"

回复收藏 0 原文

九局 2024-08-30 05:36:55

你的index.html中有什么？
您可以将值传递给index.html，设置一个javascript函数，例如：

function passvalue {
    PassParameter("userVO", "{{userVO}}");
}

然后在Flex中设置一个函数：

public function gethtmlparam(name:String, val:String):void {
            switch (name) {
                case "userVO": userVO= val; break;}
}

并在：中回调这两个函数

ExternalInterface.addCallback("PassParameter", gethtmlparam);

希望它能有所帮助。

What's in your index.html?
You can pass the values to index.html, set a javascript function like:

function passvalue {
    PassParameter("userVO", "{{userVO}}");
}

Then set a function in Flex:

public function gethtmlparam(name:String, val:String):void {
            switch (name) {
                case "userVO": userVO= val; break;}
}

and call back these two function in :

ExternalInterface.addCallback("PassParameter", gethtmlparam);

Hope it can help.

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