Bug 276478 - Put back two important lines for the async reading code used in Mozilla 1.0, and fix getFileFromURLSpec on Mozilla 1.0.

ChatZilla only.
r=rginda

extensions/irc/js/lib/connection-xpcom.js

@@ -548,6 +548,9 @@ function sl_dataavail (request, ctxt, inStr, sourceOffset, count)
         return;
     }
 
+    if (!("_sInputStream" in ctxt))
+        ctxt._sInputStream = toSInputStream(inStr, false);
+
     if (this._observer)
         this._observer.onStreamDataAvailable(request, inStr, sourceOffset,
                                              count);

extensions/irc/js/lib/utils.js

@@ -908,7 +908,22 @@ function getFileFromURLSpec(url)
 
     var service = getService("@mozilla.org/network/io-service;1", 
                              "nsIIOService");
-    
+
+    /* In sept 2002, bug 166792 moved this method to the nsIFileProtocolHandler
+     * interface, but we need to support older versions too. */
+    if ("getFileFromURLSpec" in service)
+        return service.getFileFromURLSpec(url);
+
+    /* In builds before 2002-08-15, there is no getFileFromURLSpec at all.
+     * Instead, we have nsIIOservice.initFileFromURLSpec(nsIFile, string).
+     */
+    if ("initFileFromURLSpec" in service)
+    {
+        var file = newObject("@mozilla.org/file/local;1", "nsILocalFile");
+        service.initFileFromURLSpec(file, url);
+        return file;
+    }
+
     var handler = service.getProtocolHandler("file");
     handler = handler.QueryInterface(nsIFileProtocolHandler);
     return handler.getFileFromURLSpec(url);