github/greenshot
1
0
Fork 0
mirror of https://github.com/greenshot/greenshot synced 2025-07-13 16:43:54 -07:00
Code Issues Projects Releases Packages Wiki Activity Actions

try to load the latest help file in preferred language from getgreenshot.org, using local help files as fallback

Browse source 
git-svn-id: http://svn.code.sf.net/p/greenshot/code/trunk@1764 7dccd23d-a4a3-4e1f-8c07-b4c1b4018ab4
This commit is contained in:
JKlingen 2012-04-09 21:43:20 +00:00
parent afc9c37ce5
commit fc0d32a82f
6 changed files with 87 additions and 138 deletions
Download patch file Download diff file Expand all files Collapse all files

84
Greenshot/Help/HelpFileLoader.cs Normal file
View file

@ -0,0 +1,84 @@
/*
* Created by SharpDevelop.
* User: jens
* Date: 09.04.2012
* Time: 19:24
*
* To change this template use Tools | Options | Coding | Edit Standard Headers.
*/
using Greenshot.Configuration;
using GreenshotPlugin.Core;
using System;
using System.Diagnostics;
using System.Net;
using System.Windows.Forms;
namespace Greenshot.Help
{
/// <summary>
/// Description of HelpFileLoader.
/// </summary>
public sealed class HelpFileLoader
{
private static readonly log4net.ILog LOG = log4net.LogManager.GetLogger(typeof(HelpFileLoader));
private const string EXT_HELP_URL = @"http://getgreenshot.org/help/";
private HelpFileLoader()
{
}
public static void LoadHelp() {
string uri = findOnlineHelpUrl(Language.GetInstance().CurrentLanguage);
if(uri == null) {
uri = Language.GetInstance().GetHelpFilePath();
}
Process.Start(uri);
}
/// <returns>URL of help file in selected ietf, or (if not present) default ietf, or null (if not present, too. probably indicating that there is no internet connection)</returns>
private static string findOnlineHelpUrl(string currentIETF) {
string ret = null;
string extHelpUrlForCurrrentIETF = EXT_HELP_URL;
if(!currentIETF.Equals("en_US")) {
extHelpUrlForCurrrentIETF += currentIETF.ToLower() + "/";
}
HttpStatusCode? s = getHttpStatus(extHelpUrlForCurrrentIETF);
if(s == HttpStatusCode.OK) {
ret = extHelpUrlForCurrrentIETF;
} else if(s != null && !extHelpUrlForCurrrentIETF.Equals(EXT_HELP_URL)) {
LOG.Debug(String.Format("Localized online help not found at %s, will try %s as fallback", extHelpUrlForCurrrentIETF, EXT_HELP_URL));
s = getHttpStatus(EXT_HELP_URL);
if(s == HttpStatusCode.OK) {
ret = EXT_HELP_URL;
} else {
LOG.Warn(String.Format("%s returned status %s", EXT_HELP_URL, s));
}
} else if(s == null){
LOG.Info("Internet connection does not seem to be available, will load help from file system.");
}
return ret;
}
/// <summary>
/// Retrieves HTTP status for a given url.
/// </summary>
/// <param name="url">URL for which the HTTP status is to be checked</param>
/// <returns>An HTTP status code, or null if there is none (probably indicating that there is no internet connection available</returns>
private static HttpStatusCode? getHttpStatus(string url) {
try {
HttpWebRequest req = (HttpWebRequest)HttpWebRequest.Create(url);
HttpWebResponse res = (HttpWebResponse)req.GetResponse();
return res.StatusCode;
} catch(WebException e) {
if(e.Response != null) return ((HttpWebResponse)e.Response).StatusCode;
else return null;
}
}
}
}