Changed the fingerprinting code for Kavita+. Optimized System tab to be way faster. (#2140)

API/Controllers/ServerController.cs

@@ -124,6 +124,17 @@ public class ServerController : BaseApiController
         return Ok(await _statsService.GetServerInfo());
     }
 
+    /// <summary>
+    /// Returns non-sensitive information about the current system
+    /// </summary>
+    /// <remarks>This is just for the UI and is extremly lightweight</remarks>
+    /// <returns></returns>
+    [HttpGet("server-info-slim")]
+    public async Task<ActionResult<ServerInfoDto>> GetSlimVersion()
+    {
+        return Ok(await _statsService.GetServerInfoSlim());
+    }
+
 
     /// <summary>
     /// Triggers the scheduling of the convert media job. This will convert all media to the target encoding (except for PNG). Only one job will run at a time.

API/DTOs/Stats/ServerInfoSlimDto.cs

@@ -0,0 +1,21 @@
+namespace API.DTOs.Stats;
+
+/// <summary>
+/// This is just for the Server tab on UI
+/// </summary>
+public class ServerInfoSlimDto
+{
+    /// <summary>
+    /// Unique Id that represents a unique install
+    /// </summary>
+    public required string InstallId { get; set; }
+    /// <summary>
+    /// If the Kavita install is using Docker
+    /// </summary>
+    public bool IsDocker { get; set; }
+    /// <summary>
+    /// Version of Kavita
+    /// </summary>
+    public required string KavitaVersion { get; set; }
+
+}

API/Services/Tasks/StatsService.cs

@@ -23,6 +23,7 @@ public interface IStatsService
 {
     Task Send();
     Task<ServerInfoDto> GetServerInfo();
+    Task<ServerInfoSlimDto> GetServerInfoSlim();
     Task SendCancellation();
 }
 /// <summary>
@@ -171,6 +172,17 @@ public class StatsService : IStatsService
         return serverInfo;
     }
 
+    public async Task<ServerInfoSlimDto> GetServerInfoSlim()
+    {
+        var serverSettings = await _unitOfWork.SettingsRepository.GetSettingsDtoAsync();
+        return new ServerInfoSlimDto()
+        {
+            InstallId = serverSettings.InstallId,
+            KavitaVersion = serverSettings.InstallVersion,
+            IsDocker = OsInfo.IsDocker
+        };
+    }
+
     public async Task SendCancellation()
     {
         _logger.LogInformation("Informing KavitaStats that this instance is no longer sending stats");

Kavita.Common/HashUtil.cs

@@ -45,28 +45,7 @@ public static class HashUtil
 
     public static string ServerToken()
     {
-        var seed = new DeviceIdBuilder()
-            .AddMacAddress()
-            .AddUserName()
-            .AddComponent("ProcessorCount", new DeviceIdComponent($"{Environment.ProcessorCount}"))
-            .AddComponent("OSPlatform", new DeviceIdComponent($"{Environment.OSVersion.Platform}"))
-            .OnWindows(windows => windows
-                .AddProcessorId())
-            .OnLinux(linux =>
-            {
-                var osInfo = RunAndCapture("uname", "-a");
-                if (Regex.IsMatch(osInfo, @"\bUnraid\b"))
-                {
-                    var cpuModel = RunAndCapture("lscpu", string.Empty);
-                    var match = Regex.Match(cpuModel, @"Model name:\s+(.+)");
-                    linux.AddComponent("CPUModel", new DeviceIdComponent($"{match.Groups[1].Value.Trim()}"));
-                    return;
-                }
-                linux.AddMotherboardSerialNumber();
-            })
-            .OnMac(mac => mac.AddSystemDriveSerialNumber())
-            .ToString();
-        return CalculateCrc(seed);
+        return AnonymousToken();
     }
 
     /// <summary>

UI/Web/src/app/_services/server.service.ts

@@ -1,7 +1,7 @@
 import { HttpClient } from '@angular/common/http';
 import { Injectable } from '@angular/core';
 import { environment } from 'src/environments/environment';
-import { ServerInfo } from '../admin/_models/server-info';
+import {ServerInfoSlim} from '../admin/_models/server-info';
 import { UpdateVersionEvent } from '../_models/events/update-version-event';
 import { Job } from '../_models/job/job';
 import { KavitaMediaError } from '../admin/_models/media-error';
@@ -17,7 +17,7 @@ export class ServerService {
 
 
   getServerInfo() {
-    return this.httpClient.get<ServerInfo>(this.baseUrl + 'server/server-info');
+    return this.httpClient.get<ServerInfoSlim>(this.baseUrl + 'server/server-info-slim');
   }
 
   clearCache() {

UI/Web/src/app/admin/_models/server-info.ts

@@ -1,9 +1,5 @@
-export interface ServerInfo {
-    os: string;
-    dotnetVersion: string;
-    runTimeVersion: string;
+export interface ServerInfoSlim {
     kavitaVersion: string;
-    NumOfCores: number;
     installId: string;
     isDocker: boolean;
-}
+}

UI/Web/src/app/admin/manage-system/manage-system.component.ts

@@ -4,7 +4,7 @@ import { ToastrService } from 'ngx-toastr';
 import { take } from 'rxjs/operators';
 import { ServerService } from 'src/app/_services/server.service';
 import { SettingsService } from '../settings.service';
-import { ServerInfo } from '../_models/server-info';
+import {ServerInfoSlim} from '../_models/server-info';
 import { ServerSettings } from '../_models/server-settings';
 import { NgIf } from '@angular/common';
 
@@ -19,10 +19,10 @@ export class ManageSystemComponent implements OnInit {
 
   settingsForm: FormGroup = new FormGroup({});
   serverSettings!: ServerSettings;
-  serverInfo!: ServerInfo;
+  serverInfo!: ServerInfoSlim;
 
 
-  constructor(private settingsService: SettingsService, private toastr: ToastrService, 
+  constructor(private settingsService: SettingsService, private toastr: ToastrService,
     private serverService: ServerService) { }
 
   ngOnInit(): void {

openapi.json

@@ -7,7 +7,7 @@
       "name": "GPL-3.0",
       "url": "https://github.com/Kareadita/Kavita/blob/develop/LICENSE"
     },
-    "version": "0.7.4.4"
+    "version": "0.7.4.5"
   },
   "servers": [
     {
@@ -8384,6 +8384,37 @@
         }
       }
     },
+    "/api/Server/server-info-slim": {
+      "get": {
+        "tags": [
+          "Server"
+        ],
+        "summary": "Returns non-sensitive information about the current system",
+        "description": "This is just for the UI and is extremly lightweight",
+        "responses": {
+          "200": {
+            "description": "Success",
+            "content": {
+              "text/plain": {
+                "schema": {
+                  "$ref": "#/components/schemas/ServerInfoDto"
+                }
+              },
+              "application/json": {
+                "schema": {
+                  "$ref": "#/components/schemas/ServerInfoDto"
+                }
+              },
+              "text/json": {
+                "schema": {
+                  "$ref": "#/components/schemas/ServerInfoDto"
+                }
+              }
+            }
+          }
+        }
+      }
+    },
     "/api/Server/convert-media": {
       "post": {
         "tags": [