Sharepoint application server side writing

MSAPINewbie 26

Hello,

I am new to the Microsoft world and I would like to write an application to see if a file has been added or changed in Sharepoint.
I have read that you can use the Event Remote Receiver for this. But as far as I understand it, this can only be done as an add-in application.
I would like to send a message(JSON) (RESTestful) to a client (one self-written Python program) when a file has been changed or added.

So I would like to know if this can be solved with ASP.NET Core MVC and if this can be run on a server so that everyone with this client is notified.

I would be very happy about a nice answer, and please don't be so strict with me since I'm a beginner with ASP.NET etc. at the moment (as already mentioned ;-)).

Thanks in advance :-)

4 answers

Bruce (SqlWork.com) 56,766 Reputation points

2021-07-24T16:16:13.08+00:00

You want to use SharePoint web hooks.

https://learn.microsoft.com/en-us/sharepoint/dev/apis/webhooks/overview-sharepoint-webhooks
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RaytheonXie_MSFT 31,606 Reputation points Microsoft Vendor

2021-07-26T07:19:13.723+00:00

Hi @MSAPINewbie ,
You can use ASP.NET for programming.Take following link as reference:
https://learn.microsoft.com/en-us/sharepoint/dev/apis/webhooks/get-started-webhooks

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RaytheonXie_MSFT 31,606 Reputation points Microsoft Vendor

2021-08-03T08:47:32.173+00:00

Hi @MSAPINewbie ,
I am checking to see how things are going there on this issue.

MSAPINewbie 26 Reputation points

2021-08-03T08:58:22.773+00:00

In ASP Net:

I get after the first start in the following class this message:

Error CS7069 The reference to type "TokenValidationParameters" was supposedly declared in "System.IdentityModel.Tokens.Jwt" but could not be found.

Error CS0246 The type or namespace name "TokenValidationParameters" was not found (possibly missing a using directive or assembly reference).

In the class:

namespace WebApplication { public partial class Startup { public void ConfigureAuth(IAppBuilder app) { app.UseWindowsAzureActiveDirectoryBearerAuthentication( new WindowsAzureActiveDirectoryBearerAuthenticationOptions { Tenant = ConfigurationManager.AppSettings["ida:Tenant"], TokenValidationParameters = new TokenValidationParameters { ValidAudience = ConfigurationManager.AppSettings["ida:Audience"] }, }); } } }

RaytheonXie_MSFT 31,606 Reputation points Microsoft Vendor

2021-08-03T09:34:20.003+00:00

Hi @MSAPINewbie ,
It seems don't support System.IdentityModel.Tokens.Jwt 5.0.0,please use 4.x

MSAPINewbie 26 Reputation points

2021-08-03T09:42:37.81+00:00

I have downgroaded to version 4.0.4.403061554 but but the problem is still there :-(

Compiler Error CS0246

MSAPINewbie 26 Reputation points

2021-08-03T13:17:56.52+00:00

all my packeges in the project:
Link: https://pastebin.com/UDvsDLQU

RaytheonXie_MSFT 31,606 Reputation points Microsoft Vendor

2021-08-04T09:49:13.997+00:00

Hi @MSAPINewbie ,
You can check steps in following link
https://github.com/AzureAD/azure-activedirectory-identitymodel-extensions-for-dotnet/wiki/Migrating-from-Katana-(OWIN)-3.x-to-4.x

MSAPINewbie 26 Reputation points

2021-08-04T11:30:05.543+00:00

I have completely rebuilt the project with .Net Framework 4.6.1 and after downloading all packages using NuGet I get the following message after the first start:
Although I have connected the project to Azure before.
all the info is in my Web.config.
(appsettings)

Exception thrown: "System.ArgumentException" in Microsoft.Owin.Security.ActiveDirectory.dll
A "System.ArgumentException" type exception occurred in Microsoft.Owin.Security.ActiveDirectory.dll, but it was not processed in the user code.
The "Tenant" option must be specified.

RaytheonXie_MSFT 31,606 Reputation points Microsoft Vendor

2021-08-05T01:26:05.2+00:00

Hi @MSAPINewbie ,
Could you provide us the complete details of the error?
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MSAPINewbie 26 Reputation points

2021-07-24T17:02:05.077+00:00

Hello, thanks for the quick reply, my question:

Which programming language/framework can I use to implement webhooks ?
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Bruce Barker 801 Reputation points

2021-07-26T14:39:39.603+00:00

It is a REST api so you can use any language you like. Besides c#, node is popular. Here is a python example

https://martinnoah.com/sharepoint-rest-api-with-python.html#.YP7I7i1Ha-o

MSAPINewbie 26 Reputation points

2021-07-26T14:53:53.777+00:00

Hello, thank you for your answer:

I am looking for a way how to be notified when a file has been added or changed.
Meanwhile I think you need a webhook ;-)

Unfortunately I can't find any webhook stuff for Python, Java etc.
Except simple CRUD operations

RaytheonXie_MSFT 31,606 Reputation points Microsoft Vendor

2021-07-29T08:12:57.107+00:00

Hi @MSAPINewbie ,
Since we consider to use webhook.
But webhook is out of our support scope. You can get answers from webhook support.

MSAPINewbie 26 Reputation points

2021-07-29T08:36:30.573+00:00

Where can I find the webhook support ?
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APIPointNewbie 146 Reputation points

2021-07-28T20:15:52.297+00:00

Is it possible to write Sharepoint Webhooks(Spring Boot) in Java or Python ?
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Bruce (SqlWork.com) 56,766 Reputation points

2021-07-29T15:05:09.43+00:00

As web hooks are REST api, and SharePoint has a REST api, the only requirement is the language have an sdk to build a web server code, and make http calls.

Note you can also use azure functions or AWS lambdas, which support a large number of languages.

APIPointNewbie 146 Reputation points

2021-07-29T15:12:52.687+00:00

Interesting, so for example if I can put the Microsoft Graph SDK for Java into a Spring boot application, I can also use Webhooks and the Search API via the SDK ?

Bruce (SqlWork.com) 56,766 Reputation points

2021-07-29T17:54:23.127+00:00

Sure, but I typically don’t use the sdk from c# I just use httpclient and the endpoints.
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