用於Firefox的HTTP傳遞可插入協議

Question

如何爲Firefox中的IE工作制作http傳遞可插入協議？

另外，如何開發一個用於Firefox？任何例子，將不勝感激。

謝謝。

Answer 1

編寫實現nsIObserver的XPCOM對象。然後爲http-on-modify-request和http-on-examine-response創建監聽器。

var myObj = new MyObserver(); //implements nsIObserver 
var observerService = Components.classes["@mozilla.org/observer-service;1"].getService(Components.interfaces.nsIObserverService); 
observerService.addObserver(myObj "http-on-modify-request", false); 
observerService.addObserver(myObj, "http-on-examine-response", false); 

Answer 2

在Firefox上，如果您想以「可插拔」的方式繞過默認行爲，您可以編寫NPAPI based plugin。假設文檔在這個主題上很薄弱......但爲了讓你開始，你可以諮詢this。

使用NPAPI插件，您可以訪問整個操作系統，因此可以向Firefox公開任何其他資源。

Answer 3

編寫實現nsIProtocolHandler的XPCOM對象。例如，您可以從網頁訪問本地圖片：

const Cu = Components.utils; 
const Ci = Components.interfaces; 
const Cm = Components.manager; 
const Cc = Components.classes; 
Cu.import("resource://gre/modules/XPCOMUtils.jsm");+ 
Cu.import("resource://gre/modules/FileUtils.jsm"); 
Cu.import("resource://gre/modules/NetUtil.jsm"); 
/*********************************************************** 
class definition 
***********************************************************/ 
function sampleProtocol() { 
    // If you only need to access your component from JavaScript, 
    //uncomment the following line: 
    this.wrappedJSObject = this; 
} 
sampleProtocol.prototype = { 
classDescription: "LocalFile sample protocol", 
classID:   Components.ID("{XXXXXXXX-XXXX-XXXX-XXXX-XXXXXXXXXXXX}"), 
contractID:  "@mozilla.org/network/protocol;1?name=x-localfile", 
QueryInterface: XPCOMUtils.generateQI([Ci.nsIProtocolHandler]), 
//interface nsIProtocolHandler 
allowPort :function(port, scheme) 
{ 
    if ((port == 80)&&(scheme == x-localfile)) { 
    return true; 
} 
else 
{ 
    return false; 
} 
}, 

newChannel: function(aURI) 
{ 
    // Just example. Implementation must parse aURI 
    var file = new FileUtils.File("D:\\temp\\getImage.jpg"); 
    var uri = NetUtil.ioService.newFileURI(file); 
    var channel = NetUtil.ioService.newChannelFromURI(uri); 
    return channel; 
}, 
newURI(aSpec, aOriginCharset, aBaseURI) 
{ 
    //URI looks like x-localfile://example.com/image1.jpg 
    var uri = Cc["@mozilla.org/network/simple-uri;1"].createInstance(Ci.nsIURI); 
    uri.spec = aSpec; 
    return uri; 
}, 
scheme: "x-localfile", 
defaultPort: 80, 
protocolFlags: 76 
}; 
var components = [sampleProtocol]; 
if ("generateNSGetFactory" in XPCOMUtils) 
var NSGetFactory = XPCOMUtils.generateNSGetFactory(components); // Firefox 4.0 and higher 
else 
var NSGetModule = XPCOMUtils.generateNSGetModule(components); // Firefox 3.x 

要當心！這種方法可能造成漏洞