如何將數據發送到Chrome擴展程序？

Question

我正在為我的書簽擴展開發用戶身份驗證。 該擴展程序適用於http://ting-1.appspot.com/上的Google App Engine（Python）后端。

第一次運行擴展程序時， background.html在新標簽頁中打開options.html ，並且用戶會輸入其電子郵件地址。 我將這樣的電子郵件地址發送到應用程序（尚未嘗試）：

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);

在應用程序中，處理程序AuthSender將確認電子郵件發送給用戶：

class AuthSender(webapp.RequestHandler):
    def post(self):
        new_user = self.request.get("extension_user") 
        mail.send_mail(
        sender="Ting <ting@gmail.com>",
        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!""")

如果用戶單擊電子郵件中的鏈接，則應用程序中的AuthReceive處理程序將處理請求並向擴展發送確認。 但我無法弄清楚如何將確認發送到擴展程序。

當用戶點擊鏈接時，如何將確認發送回擴展程序？ 我是否再次使用XMLHttpRequest ？ 怎么樣？ 我需要在擴展中放置什么樣的聽眾？

下面是應用程序中AuthReceive處理程序的草圖：

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

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

並在background.html

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

謝謝你的幫助。

UPDATE

這是符合Moishe答案的代碼。 除最后一步外，一切正常： handler.onmessage未被觸發。

options.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 <ting@gmail.com>"
        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

（相關問題）

options.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 <ting@gmail.com>"
        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)

Answer 1

您可以使用Channel API來完成此任務。 在創建XMLHttpRequest的同時請求令牌，並打開通道以偵聽消息。 當您的應用處理與用戶點擊鏈接相對應的HTTP請求時，請向為該用戶的擴展創建的頻道發送消息。

更多詳情：

基本上，在制作XHR的options.html中，執行以下操作：

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);

然后在您的服務器上，'authsender'頁面的處理程序將執行以下操作：

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)

以上兩個功能將讓您的客戶端在一個頻道上收聽。 下一步是：當用戶點擊鏈接時會發生什么？

之前，我們在包含user_id參數的電子郵件中發送了該鏈接（出於說明的目的，您可能想要使用其他內容）。 現在，當用戶點擊鏈接時，它將向authHandler路徑發出HTTP請求，並以user_id作為參數。 因此我們可以使用user_id來識別要發送消息的頻道，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

然后將調用handler.onmessage回調，您可以做任何您需要做的事情，因為用戶已經驗證了他們的電子郵件地址。

希望那有所幫助！

如何將數據發送到Chrome擴展程序？

問題描述

1 個解決方案

解決方案1
4 已采納 2011-10-29 21:47:02

如何將數據發送到Chrome擴展程序？

問題描述

1 個解決方案

解決方案1 4 已采納 2011-10-29 21:47:02

解決方案1
4 已采納 2011-10-29 21:47:02