Improve the validation around the Application URL

src/Ombi/ClientApp/app/services/settings.service.ts

@@ -279,4 +279,7 @@ export class SettingsService extends ServiceHelpers {
         return this.http
             .post<boolean>(`${this.url}/notifications/newsletter`, JSON.stringify(settings), {headers: this.headers});
     }
+    public verifyUrl(url: string): Observable<boolean> {
+        return this.http.post<boolean>(`${this.url}/customization/urlverify`, JSON.stringify({url}), {headers: this.headers});
+    }
 }

src/Ombi/ClientApp/app/settings/customization/customization.component.ts

@@ -43,13 +43,24 @@ export class CustomizationComponent implements OnInit {
     }
 
     public save() {
-        this.settingsService.saveCustomization(this.settings).subscribe(x => {
-            if (x) {
-                this.notificationService.success("Successfully saved Ombi settings");
-            } else {
-                this.notificationService.success("There was an error when saving the Ombi settings");
+
+        this.settingsService.verifyUrl(this.settings.applicationUrl).subscribe(x => {
+            if(this.settings.applicationUrl) {
+                if(!x) {
+                    this.notificationService.error(`The URL "${this.settings.applicationUrl}" is not valid. Please format it correctly e.g. http://www.google.com/`);
+                    return;
+                }
             }
+
+            this.settingsService.saveCustomization(this.settings).subscribe(x => {
+                if (x) {
+                    this.notificationService.success("Successfully saved Ombi settings");
+                } else {
+                    this.notificationService.success("There was an error when saving the Ombi settings");
+                }
+            });
         });
+
     }
 
     public dropDownChange(event: any): void {

src/Ombi/Controllers/SettingsController.cs

@@ -39,16 +39,6 @@ namespace Ombi.Controllers
     [Produces("application/json")]
     public class SettingsController : Controller
     {
-        /// <summary>
-        /// Initializes a new instance of the <see cref="SettingsController" /> class.
-        /// </summary>
-        /// <param name="resolver">The resolver.</param>
-        /// <param name="mapper">The mapper.</param>
-        /// <param name="templateRepo">The templateRepo.</param>
-        /// <param name="embyApi">The embyApi.</param>
-        /// <param name="radarrSync">The radarrCacher.</param>
-        /// <param name="memCache">The memory cache.</param>
-        /// <param name="githubApi">The memory cache.</param>
         public SettingsController(ISettingsResolver resolver,
             IMapper mapper,
             INotificationTemplatesRepository templateRepo,
@@ -228,6 +218,13 @@ namespace Ombi.Controllers
             return await Save(settings);
         }
 
+        [ApiExplorerSettings(IgnoreApi = true)]
+        [HttpPost("customization/urlverify")]
+        public bool VerifyUrl([FromBody]UrlVerifyModel url)
+        {
+            return Uri.TryCreate(url.Url, UriKind.Absolute, out var __);
+        }
+
         /// <summary>
         /// Get's the preset themes available
         /// </summary>

src/Ombi/Models/UrlVerifyModel.cs

@@ -0,0 +1,7 @@
+namespace Ombi.Models
+{
+    public class UrlVerifyModel
+    {
+        public string Url { get; set; }
+    }
+}