Create Timer Azure Function which use CSOM to integrate with SharePoint Online, locally and deployed inside Azure - azure-devops

Question

I have created an Azure Function which runs on schedule bases >> it worked locally and also when i deploy it to Azure >> the function uses PnP core. Here is my startup.cs:-
using Microsoft.Azure.Functions.Extensions.DependencyInjection;
using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.DependencyInjection;
using PnP.Core.Auth;
using System.Security.Cryptography.X509Certificates;
[assembly: FunctionsStartup(typeof(FunctionApp2.Startup))]
namespace FunctionApp2
{
class Startup : FunctionsStartup
{
public override void Configure(IFunctionsHostBuilder builder)
{
var config = builder.GetContext().Configuration;
var azureFunctionSettings = new AzureFunctionSettings();
config.Bind(azureFunctionSettings);
builder.Services.AddPnPCore(options =>
{
options.DisableTelemetry = true;
var authProvider = new X509CertificateAuthenticationProvider(azureFunctionSettings.ClientId,
azureFunctionSettings.TenantId,
StoreName.My,
StoreLocation.CurrentUser,
azureFunctionSettings.CertificateThumbprint);
options.DefaultAuthenticationProvider = authProvider;
options.Sites.Add("Default", new PnP.Core.Services.Builder.Configuration.PnPCoreSiteOptions
{
SiteUrl = azureFunctionSettings.SiteUrl,
AuthenticationProvider = authProvider
});
});
}
}
}
and the function class:-
using System;
using Microsoft.Azure.WebJobs;
using Microsoft.Azure.WebJobs.Host;
using Microsoft.Extensions.Logging;
using PnP.Core.Services;
using PnP.Core.Model.SharePoint;
using System.Collections.Generic;
namespace FunctionApp2
{
public class Function1
{
private readonly IPnPContextFactory pnpContextFactory;
public Function1(IPnPContextFactory pnpContextFactory)
{
this.pnpContextFactory = pnpContextFactory;
}
[FunctionName("Function1")]
public void Run([TimerTrigger("0 */5 * * * *")] TimerInfo myTimer, ILogger log)
{
log.LogInformation($"C# Timer trigger function executed at: {DateTime.Now}");
using (var context = pnpContextFactory.Create("Default"))
{
var myList = context.Web.Lists.GetByTitle("Tracking");
Dictionary<string, object> values = new Dictionary<string, object>
{
{ "Title", System.DateTime.Now }
};
//code goes here
}
}
}
}
and finally the localsetting.json :-
{ "IsEncrypted": false,
"Values": { "AzureWebJobsStorage": "UseDevelopmentStorage=true", "FUNCTIONS_WORKER_RUNTIME": "dotnet",
"SiteUrl": "https://**.sharepoint.com/",
"TenantId": "**",
"ClientId": "**",
"CertificateThumbPrint": "**",
"WEBSITE_LOAD_CERTIFICATES": "**" } }
where i am able to test the function ,locally since i am using the Azure Storage locally + i am able to secure my call to azure active directory App using certificate (self-signed).
now i am trying to do the same project, but instead of using PnP, to use the CSOM library. i search the net but i could not find a complete code, i tried the following from an old post on the net:-
starup.cs code:-
using Microsoft.Azure.Functions.Extensions.DependencyInjection;
using Microsoft.Identity.Client;
using System.IO;
using System;
using System.Security.Cryptography.X509Certificates;
using Microsoft.SharePoint.Client;
using System.Threading.Tasks;
[assembly: FunctionsStartup(typeof(FunctionApp2.Startup))]
namespace FunctionApp2
{ class Startup :
FunctionsStartup {
public override void Configure(IFunctionsHostBuilder builder)
{private static string ClientId = "(Application ID)";
private static string Cert = "(filename).pfx";
private static string CertPassword = "(password)";
private static string Authority = "https://login.windows.net/(tenantName).onmicrosoft.com/";
private static string Resource = "https://(tenantName).sharepoint.com/";
public async static Task<ClientContext> GetClientContext(string siteUrl)
{
var authenticationContext = new AuthenticationContext(Authority, false);
var certPath = Path.Combine(Environment.GetEnvironmentVariable("HOME"), "site\\wwwroot\\<FunctionName>\\", Cert);
var cert = new X509Certificate2(System.IO.File.ReadAllBytes(certPath),
CertPassword,
X509KeyStorageFlags.Exportable |
X509KeyStorageFlags.MachineKeySet |
X509KeyStorageFlags.PersistKeySet);
var authenticationResult = await authenticationContext.AcquireTokenAsync(Resource, new (ClientId, cert));
var token = authenticationResult.AccessToken;
var ctx = new ClientContext(siteUrl);
ctx.ExecutingWebRequest += (s, e) =>
{
e.WebRequestExecutor.RequestHeaders["Authorization"] = "Bearer " + authenticationResult.AccessToken;
};
return ctx;
}
}}
the function code:-
using System; using Microsoft.Azure.WebJobs;
using Microsoft.Azure.WebJobs.Host;
using Microsoft.Extensions.Logging;
using PnP.Core.Services;
using PnP.Core.Model.SharePoint;
using System.Collections.Generic;
namespace FunctionApp2 { public class Function1{
private readonly IPnPContextFactory pnpContextFactory;
public Function1(IPnPContextFactory pnpContextFactory)
{
this.pnpContextFactory = pnpContextFactory;
}
[FunctionName("Function1")]
public void Run([TimerTrigger("0 */5 * * * *")] TimerInfo myTimer, ILogger log)
{
log.LogInformation($"C# Timer trigger function executed at: {DateTime.Now}");
using (var context = pnpContextFactory.Create("Default"))
{
var myList = context.Web.Lists.GetByTitle("Tracking");
Dictionary<string, object> values = new Dictionary<string, object>
{
//code goes here
};
}
}
}}
but currently i am facing these issue:-
inside my startup class for the CSOM project, i am getting an error that AuthenticationContext can not be found and its reference Microsoft.IdentityModel.client.ActiveDirectory is obsolete now
how i can define to use the local storage to be able to debug my code when using CSOM.
what i need to do inside my Function class to replace PnP code with CSOM ?
Thanks