I am new to SharePoint so I am following some Microsoft Learning Guides. One exercise is to create a feature reciever to modify the Web.Config file.
I detect the feature being activated or deactivated and call the following routine with the appropriate flag.
void setProliferationFlag(bool status)
{
SPWebApplication webApp = SPWebApplication.Lookup(new Uri("http://SharePoint"));
try
{
SPWebConfigModification mySetting = null;
if (status)
{
mySetting = new SPWebConfigModification();
mySetting.Path = "configuration/appSettings";
mySetting.Name = "add [#key='preventProliferation'] [#value='1']";
mySetting.Sequence = 0;
mySetting.Owner = "Lab05Owner";
mySetting.Type = SPWebConfigModification.SPWebConfigModificationType.EnsureChildNode;
mySetting.Value = "<add key='preventProliferation' value='1' />";
webApp.WebConfigModifications.Add(mySetting);
}
else
{
foreach (SPWebConfigModification modification in
webApp.WebConfigModifications)
{
if (modification.Owner == "Lab05Owner")
{
modification.Value = "<add key='preventProliferation' value='0' />";
}
}
}
webApp.Update();
webApp.Farm.Services.GetValue<SPWebService>().ApplyWebConfigModifications();
}
catch
{
}
The event receivers work fine. When I activate the feature this code is run, but when it reaches the "webApp.Update()" line it fails with an "Access Denied" error. No other detils on the error. I am not sure to what the access is denied.
I am running in my development environment on my laptop. This is a Sharepoint Server 2010 installation on Window 7.
Regards Tim
Most likely you will need administrative access. Look at the SPSecurity.RunWithElevatedPrivileges method which allows you to execute such actions within the system account's security context.
You will have to run the whole code elevated, that is including opening the SPWebApplication object. You method will then look like this:
void SetProliferationFlag(…)
{
SPSecurity.RunWithElevatedPrivileges(() =>
{
// … your code goes here …
});
}
Please also note, it's a very bad practice to have empty catch clauses in your code. Do always handle all exceptions, at least by logging them and rethrowing.
Related
I am using Gecko Web browser version 21.0.1 and .net Framework 4.0 in my windows application.
When I navigate to certain web pages I get Pop up confirm message:
This web page is being redirected to a new location. Would you like to
resend the form data you have typed to the new location?
How can I disable this kind of messages?
So far I have tried the following settings, but they didn't help:
GeckoPreferences.User["security.warn_viewing_mixed"] = false;
GeckoPreferences.User["plugin.state.flash"] = 0;
GeckoPreferences.User["browser.cache.disk.enable"] = false;
GeckoPreferences.User["browser.cache.memory.enable"] = false;
You could try providing you own nsIPromptService2 / nsIPrompt implementation.
Run this early on program start up (Although after XPCom.Initalize)
PromptFactory.PromptServiceCreator = () => new FilteredPromptService();
Where FilteredPromptService is defined something like this:
internal class FilteredPromptService : nsIPromptService2, nsIPrompt
{
private static PromptService _promptService = new PromptService();
public void Alert(nsIDOMWindow aParent, string aDialogTitle, string aText)
{
if(/*want default behaviour */)
{
_promptService.Alert(aDialogTitle, aText);
}
// Else do nothing
}
// TODO: implement other methods in similar fashion. (returning appropriate return values)
}
You will also need to make sure that error pages are not enabled:
GeckoPreferences.User["browser.xul.error_pages.enabled"] = false;
I am programing an add-in for the scvmm and I have no Idea why this is happening:
This is my uncompiled add-in.dll:
[AddIn("Backup HyperV VM")]
public class BackupHyperVVM : ActionAddInBase
{
public override bool CheckIfEnabledFor(IList<ContextObject> contextObjects)
{
if (contextObjects != null && contextObjects.Count > 0)
return true;
return false;
}
public override void PerformAction(IList<ContextObject> contextObjects)
{
}
private void execPSS(string param) //Execute a powershell script within the SCVMM -- need to make shure I run it on the right host
{
PowerShellContext.ExecuteScript<ServerConnection>(param,
(items, error) =>
{
//code to set server info here
if (error == null)
{
//on Success
}
else
{
//on Error
}
});
}
}
And this is the manifest.xml:
<ConsoleAddIn
xmlns="urn:VMM-AddIns-v1-CTP"
Name="VMM Backup Add-In"
Version="0.0.1.0"
Author="..."
Description="This Add-In (once finished) provides the user with a GUI solution to backup and restore VMs from a Hyper-V host."
FolderName="BackupAddIn"
TrustLevel="Full">
<ActionAddIn
Name="Backup VMs Add-In"
Contexts="Cluster"
AssemblyName="add-in.dll"
ShowInContextMenu = "True"
ActionType="Code"
Icon="Ico.ico">
<ButtonLabel>
Backup VM
</ButtonLabel>
</ActionAddIn>
</ConsoleAddIn>
When I zip the files and try to load the add-in, I get this error (I translated it from German):
The Add-In-Component "Backup VMs Add-In" can't be found in the Assembly "add-in". Possible reasons:
1. The Attribute "Name" of the Add-In is not matching the Name defined in the Attribute "AddIn" in the Add-In-Class.
2. The Add-In-Class is not public.
Thank you for your help..I have no idea how to solve this, even the docs couldn't help me.
From what I can see, you need to change the manifest entry from AssemblyName="add-in.dll" to AssemblyName="BackupHyperVVM".
I picked up the following code from Stackoverflow->a blog re handling custom 404 in Sitecore (which acutally does a 302 redirect to 404 page with status 200 which gets picked up by google as soft 404).
While this works totally fine in our local test servers, the moment we drop it in production the site goes haywire and takes AGES e.g. 8-9 minutes to load and stuff.
public class ExecuteRequest : Sitecore.Pipelines.HttpRequest.ExecuteRequest
{
protected override void RedirectOnItemNotFound(string url)
{
var context = System.Web.HttpContext.Current;
try
{
// Request the NotFound page
var domain = context.Request.Url.GetComponents(
UriComponents.Scheme | UriComponents.Host,
UriFormat.Unescaped);
var content = WebUtil.ExecuteWebPage(
string.Concat(domain, url));
// The line below is required for IIS 7.5 hosted
// sites or else IIS is gonna display default 404 page
context.Response.TrySkipIisCustomErrors = true;
context.Response.StatusCode = 404;
context.Response.Write(content);
}
catch (Exception ex)
{
Log.Error(string.Format("Falling back to default redirection behavior. Reason for error {0}", ex), ex);
// Fall back to default behavior on exceptions
base.RedirectOnItemNotFound(url);
}
context.Response.End();
}
}
P.S: I then replaced ExecuteRequest with my custom one in web.config.
If you have experienced similar thing or know of any issue re this please do shed some light.
Thanks in advance
There is a setting in Sitecore, with which you can get rid of the 302 redirect:
<setting name="RequestErrors.UseServerSideRedirect" value="true" />
With this settings, the url stays the same and the status code is 404. If you want to have some additional logic (like showing a Sitecore item as error page), there is a Shared Source module called Error Manager on the Sitecore Market Place.
Hope that helps.
Check if the server is able to access the hostname of your website.
Servers often do not have access to a DNS and therefore are unable to resolve hostnames. In order for your 404 handler to work, the application needs to be able to access its own hostname to request the 404 page.
To be sure this works, edit the hosts file of the server and add an entry for your hostname there, pointing it to 127.0.0.1
You can resolve it with creating new resolver. It is good solution when you want to give to an user error page in right language. But there some differences in IIS 7.0 and 7.5.
Add processor to your sitecore configuration:
<processor type="Sitecore.Pipelines.HttpRequest.ItemResolver, Sitecore.Kernel"/>
<processor type="Project.Error404Resolver, Project" />
Processor resolving it:
For IIS 7.0:
public class Error404Resolver : Sitecore.Pipelines.HttpRequest.HttpRequestProcessor
{
public override void Process(Sitecore.Pipelines.HttpRequest.HttpRequestArgs args)
{
if(Sitecore.Context.Item == null && !args.Context.Request.Url.AbsolutePath.StartsWith("/sitecore")
{
args.Context.Response.Clear();
SiteContext site = Sitecore.Context.Site;
if(site != null)
{
Item item404Page = Sitecore.Context.Database.GetItem(site.RootPath + "website/error/404");
if(item404Page != null)
{
Sitecore.Context.Item = item404Page;
args.Context.Response.StatusCode = (int) System.Net.HttpStatusCode.NotFound;
}
}
}
}
}
For IIS 7.5:
public class Error404Resolver : Sitecore.Pipelines.HttpRequest.HttpRequestProcessor
{
public override void Process(Sitecore.Pipelines.HttpRequest.HttpRequestArgs args)
{
if(Sitecore.Context.Item == null && !args.Context.Request.Url.AbsolutePath.StartsWith("/sitecore")
{
args.Context.Response.Clear();
SiteContext site = Sitecore.Context.Site;
if(site != null)
{
Item item404Page = Sitecore.Context.Database.GetItem(site.RootPath + "website/error/404");
if(item404Page != null)
{
WebClient webClient = new WebClient();
webClient.Encoding = args.Context.Request.ContentEncoding;
webClient.Headers.Add("User-Agent", args.Context.Request.UserAgent);
string page = webClient.DownloadString(LinkManager.GetItemUrl(item404Page));
args.Context.Response.StatusCode = (int) System.Net.HttpStatusCode.NotFound;
args.Context.Response.Write(page);
args.Context.Response.TrySkipIisCustomErrors = true;
args.Context.Response.End();
}
}
}
}
}
Whit this you will render error page in current page without redirect and returns to a browser code 404.
I have the same issue at a customer I currently work at (looks like the code was pasted) and actually the reason is pretty obvious: If you execute this call with a url that is not registered in the Sitecore sites config (but accessible via IIS), you will also run through this code. Unfortunately, the WebUtil.ExecuteWebPage call is executed with the wrong url as well, hence you end up stuck in a loop.
Actually you should see a lot of these messages in your log: Falling back to default redirection behavior. Reason for error {0}, probably with timeouts.
If you really want to use your custom handler, you should check if you are in the right site context before calling WebUtil.ExecuteWebPage.
I'm working in VS2012 with update 1 on a win2k8 r2 64 bit.
Within a simple class library application i do Add > New Item> ADO.NET Entity Data Model
I select a SQL Server on the network and select the database and add a single table. The table gets added, and I can access it as a class name in my code.
The issue: When I do anything with backend DB, the app using my library crashes with stackoverflow error (no exception). For instance this will crash: var logs =_db_context.LOGs.ToList();
Any ideas?
EDIT: The same projects were working in VS2010 on the same machine. This only started happening when I upgraded to VS2012 which upgraded entity framework as well. Also worth mentioning that if I remove the code the access the database, the app runs just fine.
Also, removing and re-adding .edmx does not help, neither does clean/re-build or restart VS.
EDIT2: After debugging I've noticed when the line LogServerEntities context = new LogServerEntities() is reached, and I try to expand the context variable from "Locals" VS ends debugging saying Managed (v4.0.30319)' has exited with code -2146233082 (0x80131506).
The class library was actually a custom trace listener and looked like following. When I commented the FirstChanceHandler in the constructor, the exception actually made its way to the console output: an assembly reference (System.Management.Automation) was failing to load. I did not really need that assembly and simply removed it, and the stackoverflow error (which I'm guessing is a bug) went away.
public Listener()
{
AppDomain.CurrentDomain.FirstChanceException += FirstChanceHandler;
}
public void FirstChanceHandler(object source, FirstChanceExceptionEventArgs e)
{
WriteException(e.Exception);
}
public void WriteException(Exception e)
{
string app_identity = System.Reflection.Assembly.GetExecutingAssembly().ManifestModule.Name;
string server_name = System.Environment.MachineName;
using (LogServerEntities context = new LogServerEntities())
{
LOG log = new LOG();
log.DATE = DateTime.Now;
log.THREAD = Thread.CurrentThread.Name;
log.MESSAGE = e.Message;
log.LOGGER = string.Format("{0} {1}", app_identity, server_name);
log.LEVEL = Level.Exception.ToString();
log.EXCEPTION = e.GetType().FullName;
var web_exception = e as WebException;
if (web_exception != null)
{
if (web_exception.Status == WebExceptionStatus.ProtocolError)
{
var response = web_exception.Response as HttpWebResponse;
if (response != null)
log.HTTP_RESPONSE_CODE = ((int)response.StatusCode).ToString();
else
log.HTTP_STATUS = web_exception.Status.ToString();
}
else
{
log.HTTP_STATUS = web_exception.Status.ToString();
}
}
context.LOGs.Add(log);
context.SaveChanges();
}
}
This is probably more of a general c# and simple threading question than it is a Facebook SDK question, but I may be wrong. But I could really use some help. I am reusing the sample code that comes with the SDK which includes a FacebookLoginDialog class. I am currently using it like this. In my GetMessages, GetFriendRequests, and other Get* classes, I always try/catch calls like this:
try
{
var result = (IDictionary<string, object>)fb.Get("/me/inbox");
}
catch (FacebookOAuthException e)
{
FacebookSession.Login();
}
Here's my login method in my FacebookSession class
public static void Login()
{
var fbLoginDialog = new FacebookLoginDialog(APP_ID, EXTENDED_PERMISSIONS);
DialogResult dr = fbLoginDialog.ShowDialog();
DisplayAppropriateMessage(fbLoginDialog.FacebookOAuthResult);
}
And here is the constructor in my FacebookLoginDialog class (this is where I have the problem)
public FacebookLoginDialog(string appId, string[] extendedPermissions, bool logout)
{
try
{
var oauth = new FacebookOAuthClient { AppId = appId };
var loginParameters = new Dictionary<string, object>
{
{ "response_type", "token" },
{ "display", "popup" }
};
if (extendedPermissions != null && extendedPermissions.Length > 0)
{
var scope = new StringBuilder();
scope.Append(string.Join(",", extendedPermissions));
loginParameters["scope"] = scope.ToString();
}
var loginUrl = oauth.GetLoginUrl(loginParameters);
if (logout)
{
var logoutParameters = new Dictionary<string, object>
{
{ "next", loginUrl }
};
System.Uri uri =
new Uri("https://www.facebook.com/logout.php?next=" +
"https://www.facebook.com/connect/login_success.html&access_token=" +
FacebookSession._accessToken);
this.navigateUrl = uri;
}
else
{
this.navigateUrl = loginUrl;
}
InitializeComponent(); // crash here... sometimes
}
catch (Exception e)
{
//Log error message
}
}
Sorry for all the code, but now the problem. This code works fine the first time through. If I go to my facebook applications permissions page in Facebook and remove the app (that is, remove its permissions), while my desktop app here is NOT running, when I do start it up, it sees that it does not have permission and shows the login dialog. I can save the access_key and it will work just fine. But if I go to the facebook apps page and yank the permissions while my desktop app is running, then bad things happen. I get an error message about the activex control cannot be instantiated because the current thread is not in a single-threaded apartment. I have seen many posts here that say all you have to do is put [STAThread] above your main(), and my code has that. I have also tried creating a new thread to call the FacebookLoginDialog, but not only did that not work, but since my code is really not designed to run in multiple threads, that started causing more problems.
Is there a simple solution to all this, or do I need to redesign my code so that it properly runs in multiple threads? Or should I just live with the program crashing in those few instances when someone monkeys with the facebook permissions while my app is running?