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我需要在我的Thunderbird擴展中獲取一些電子郵件消息數據。我發現MDN這個例子(https://developer.mozilla.org/en-US/docs/XPCOM_Interface_Reference/nsIMsgMessageService):在Thunderbird擴展中獲取選定的消息數據
var content = "";
var MessageURI = GetFirstSelectedMessage();
var MsgService = messenger.messageServiceFromURI(MessageURI);
var MsgStream = Components.classes["@mozilla.org/network/sync-stream-listener;1"].createInstance();
var consumer = MsgStream.QueryInterface(Components.interfaces.nsIInputStream);
var ScriptInput = Components.classes["@mozilla.org/scriptableinputstream;1"].createInstance();
var ScriptInputStream = ScriptInput.QueryInterface(Components.interfaces.nsIScriptableInputStream);
ScriptInputStream.init(consumer);
try {
MsgService.streamMessage(MessageURI, MsgStream, msgWindow, null, false, null);
} catch (ex) {
alert("error: "+ex)
}
ScriptInputStream .available();
while (ScriptInputStream .available()) {
content = content + ScriptInputStream .read(512);
}
alert(content);
然而,當我運行它,我得到以下錯誤:
Timestamp: 2013.06.21. 14:47:21
Error: ReferenceError: GetFirstSelectedMessage is not defined
Source File: chrome://edus_extension/content/messengerOverlay.js
Line: 90
這是什麼「GetFirstSelectedMessage」功能,如何才能得到消息URI沒有使用它?