From 2d20fe717d5013ce6c54bdcaaa1594b3c65752e8 Mon Sep 17 00:00:00 2001
From: Dan Stillman <dstillman@zotero.org>
Date: Thu, 15 Jun 2006 16:52:46 +0000
Subject: [PATCH] Added Scholar.HTTP.browserIsOffline() and changed doGet() and
 doPost() to return false if so

---
 .../content/scholar/xpcom/scholar.js          | 29 +++++++++++++++++++
 1 file changed, 29 insertions(+)

diff --git a/chrome/chromeFiles/content/scholar/xpcom/scholar.js b/chrome/chromeFiles/content/scholar/xpcom/scholar.js
index 71a1ba128..cc95e97b1 100644
--- a/chrome/chromeFiles/content/scholar/xpcom/scholar.js
+++ b/chrome/chromeFiles/content/scholar/xpcom/scholar.js
@@ -327,8 +327,18 @@ Scholar.HTTP = new function(){
 	
 	this.doGet = doGet;
 	this.doPost = doPost;
+	this.browserIsOffline = browserIsOffline;
 	
+	/**
+	* Send an HTTP GET request via XMLHTTPRequest
+	*
+	* Returns false if browser is offline
+	**/
 	function doGet(url, onStatus, onDone){
+		if (this.browserIsOffline()){
+			return false;
+		}
+		
 		var xmlhttp = Components.classes["@mozilla.org/xmlextras/xmlhttprequest;1"]
 					.createInstance();
 		
@@ -338,10 +348,21 @@ Scholar.HTTP = new function(){
 			_stateChange(xmlhttp, onStatus, onDone);
 		};
 		xmlhttp.send(null);
+		
+		return true;
 	}
 	
 	
+	/**
+	* Send an HTTP POST request via XMLHTTPRequest
+	*
+	* Returns false if browser is offline
+	**/
 	function doPost(url, body, onStatus, onDone){
+		if (this.browserIsOffline()){
+			return false;
+		}
+		
 		var xmlhttp = Components.classes["@mozilla.org/xmlextras/xmlhttprequest;1"]
 					.createInstance();
 		
@@ -351,6 +372,14 @@ Scholar.HTTP = new function(){
 			_stateChange(xmlhttp, onStatus, onDone);
 		};
 		xmlhttp.send(body);
+		
+		return true;
+	}
+	
+	
+	function browserIsOffline(){
+		return Components.classes["@mozilla.org/network/io-service;1"]
+			.getService(Components.interfaces.nsIIOService).offline;
 	}