如何将数据发送到 Chrome 扩展程序？

问题描述 投票：0回答：2

我正在为我的书签扩展开发用户身份验证。该扩展可与 Google App Engine (Python) 后端配合使用，网址为 http://ting-1.appspot.com/。

扩展程序第一次运行时，

background.html
会在新选项卡中打开
options.html
，并且用户输入他的电子邮件地址。我像这样将电子邮件地址发送到应用程序（尚未尝试）：

in options.html
---------------

var formData = new FormData();

formData.append("extension_user", userEmail);

var xhr = new XMLHttpRequest();
xhr.open("POST", "http://ting-1.appspot.com/authsender", true);
xhr.send(formData);

在应用程序中，处理程序

AuthSender
向用户发送确认电子邮件：

class AuthSender(webapp.RequestHandler):
    def post(self):
        new_user = self.request.get("extension_user") 
        mail.send_mail(
        sender="Ting <[email protected]>",
        to=new_user,
        subject="Ting Bookmarking: confirm your email",
        body="""click on the link below to confirm your email: 
<a href="http://ting-1.appspot.com/authHandler"></a> 

Happy Bookmarking!""")

如果用户单击电子邮件中的链接

AuthReceive
应用程序中的处理程序将处理请求并向扩展程序发送确认。但我不知道如何将确认发送到分机。

当用户单击链接时，如何将确认发送回扩展程序？我要再次使用

XMLHttpRequest
吗？如何？我需要在分机上放置什么样的监听器？

下面是应用程序中 

AuthReceive
处理程序的草图：

class AuthReceive(InboundMailHandler):
    def receive(self, message):

#---------------------------------------
        #receive email // I know this part
        #send confirmation to extension // I need help with this
#--------------------------------------
...

在background.html中

//...
// add listener and save the variable to localStorage
//...

感谢您的帮助。

更新

这是符合Moishe的答案的代码。除了最后一步之外，一切正常：

handler.onmessage
未触发。

选项.html

<html>
<head><title>Extension Options</title></head>
<body>
<p>Enter your gmail address:</p>

<textarea id="getEmail" style="margin-bottom: 4px; width: 250px; height: 20px">
</textarea><br />

<button id="save">Save</button>
<!--<button id="save">Clear</button>-->

<script type="text/javascript">

document.getElementById("getEmail").placeholder = "your gmail address" ;

//send entered gmail address to the server
document.getElementById("save").addEventListener
(
    "click", 
    function ()
    {
        var userEmail = document.getElementById("getEmail").value;
        var formData = new FormData();
        formData.append("extension_user", userEmail);

        var channel;
        var socket;
        var handler = new Object();
        handler.onmessage =
        function (evt)
        {   
            //evt.data will be what the server sends in channel.send_message
            console.log("evt.data received from authhandler: " + evt.data);
        };    

        var xhr = new XMLHttpRequest();
        xhr.onReadyStateChange = function()
        {
            //error handling etc not included
            if (xhr.readyState == 4 && xhr.status == 200)
            {
                token = xhr.responseText;
                channel = new goog.appengine.Channel(token);
                socket = channel.open(handler);
            }
        };
        xhr.open("POST", "http://ting-1.appspot.com/authsender", true);
        xhr.send(formData);
        console.log("formData sent to authsender: " + formData);

    }, false
)
//...
</script>
</body>
</html>

AuthSender 和 AuthHandler

class AuthSender(webapp.RequestHandler):
    def post(self):
        new_user = self.request.get("extension_user")
        link = "http://ting-1.appspot.com/authhandler?new_user=%s" % new_user

        message = mail.EmailMessage()
        message.sender="Ting <[email protected]>"
        message.to=new_user
        message.subject="Ting Bookmarking - Confirm your email"
        message.body="""Click on the link to confirm your email: %s """ % link
        message.send()

        logging.info("message sent to: %s " % message.to)

        token = channel.create_channel(new_user)
        self.response.out.write(token)

class AuthHandler(webapp.RequestHandler):
    def get(self):
        new_user = self.request.get("new_user")

        channel.send_message(new_user, new_user)

        logging.info("new_user sent to client: %s" % new_user)

工作版本

(相关问题)

选项.html

<html>
<head>
    <title>Extension Options</title>
    <!-- this does not work because it is local url
    <script type="text/javascript" src="/_ah/channel/jsapi"></script>
    -->
    <script type="text/javascript" src="https://talkgadget.google.com/talkgadget/channel.js"></script>
</head>

<body>
<p>Enter your gmail address:</p>

<textarea id="getEmail" style="margin-bottom: 4px; width: 250px; height: 20px">
</textarea><br />

<button id="save">Save</button>

<script>
document.getElementById("getEmail").placeholder = "your gmail address" ;

document.getElementById("save").addEventListener
(
    "click", 
    function ()
    {
        var userEmail = document.getElementById("getEmail").value;
        var formData = new FormData();
        formData.append("extension_user", userEmail);

        var channel;
        var socket;
        var handler = 
        {
            onopen: function () { alert("onopen") },
            onerror: function () { alert("onerror") },
            onclose: function () { alert("onclose") },
            onmessage: 
            function (evt)
            {
                alert("evt.data is: " + evt.data)
            }
        };    

        var xhr = new XMLHttpRequest();
        xhr.onreadystatechange = function()
        {
            if (xhr.readyState == 4 && xhr.status == 200)
            {
                token = xhr.responseText;
                channel = new goog.appengine.Channel(token);
                socket = channel.open(handler);
            }
        };
        xhr.open("POST", "http://ting-1.appspot.com/authsender", true);
        xhr.send(formData);            
    }, false
)
</script>
</body>
</html>

AuthSender 和 AuthHandler

class AuthSender(webapp.RequestHandler):
    def post(self):
        new_user = self.request.get("extension_user")
        link = "http://ting-1.appspot.com/authhandler?new_user=%s" % new_user

        message = mail.EmailMessage()
        message.sender="Ting <[email protected]>"
        message.to=new_user
        message.subject="Ting Bookmarking - Confirm your email"
        message.body="""Click on the link to confirm your email: %s """ % link
        message.send()

        token = channel.create_channel(new_user)

        self.response.out.write(token)

class AuthHandler(webapp.RequestHandler):
    def get(self):
        new_user = self.request.get("new_user")

        self.response.out.write(new_user)

        channel.send_message(new_user, new_user)
javascript python google-app-engine google-chrome-extension
2个回答
5
投票

您可以使用 Channel API 来完成此操作。在发出 XMLHttpRequest 的同时请求令牌，并打开通道来侦听消息。当您的应用程序处理与用户单击链接相对应的 HTTP 请求时，向为该用户的扩展程序创建的通道发送一条消息。

更多详情：

基本上，当你制作 XHR 时，在 options.html 中，执行如下操作：

var channel;
var socket;
var handler = {
  onmessage: function(evt) {
    // evt.data will be what your server sends in channel.send_message
  }
};
var xhr = new XMLHttpRequest();
xhr.onReadyStateChange = function() {
  // error handling and whatnot elided
  if (xhr.readyState == 4 and xhr.status == 200) {
    // We got a response from the server. The responseText is
    // a channel token so we can listen for a "verified" message.
    token = xhr.responseText;
    channel = new goog.appengine.Channel(token);
    socket = channel.open(handler);
  }
};
xhr.open("POST", "http://ting-1.appspot.com/authsender", true);
xhr.send(formData);

然后在您的服务器上，“authsender”页面的处理程序将执行如下操作：

class AuthSenderHandler(webapp.RequestHandler):
  def post(self):
    # get whatever data is in the form to send an email.
    # let's say that user_id is a field we extracted either from a cookie or from
    # the POST parameters themselves.
    link = "http://your.server.com/authHandler?user_id=%s" % user_id
    message = mail.EmailMessage()
    message.body = """some stuff %s""" % link
    # fill in other message fields, then send it.

    # now we'll create a channel token using the user_id and return 
    # it to the client.
    token = channel.create_channel(user_id)
    self.response.out.write(token)

以上两个函数将使您的客户端监听某个频道。下一步是：当用户单击链接时会发生什么？

之前，我们在电子邮件中发送了包含 user_id 参数的链接（出于说明目的；您可能想使用其他参数）。现在，当用户单击链接时，它将向 

authHandler
路径发出 HTTP 请求，并以 
user_id
作为参数。因此我们可以使用 user_id 来标识要发送消息的通道，如下所示：

class AuthHandler(webapp.RequestHandler):
  def get(self):
    user_id = self.request.get("user_id")
    # send a message indicating the user received the email and
    # verified to our client page. You may want to send other data.
    channel.send_message(user_id, "authorized")
    # probably want to show a nice "you've been authorized" page or something

然后 handler.onmessage 回调将被调用，现在用户已经验证了他们的电子邮件地址，您可以执行任何您需要执行的操作。

希望对您有一点帮助！

0
投票

劳动时间 劳动时间 劳动时间 劳动时间 劳动时间 劳动时间 劳动时间 劳动时间

最新问题
© www.soinside.com 2019 - 2024. All rights reserved.