From 3840fb4e8442f8961de605befb1df5030175f8ee Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Damian=20B=C3=BCchel?= <damian.buechel@let.ethz.ch>
Date: Mon, 30 Mar 2020 11:49:47 +0200
Subject: [PATCH] SEBWIN-362: Implemented fallback mechanism in case HEAD
 requests do not work for certain network resources.

---
 .../DataResources/NetworkResourceLoader.cs          | 13 ++++++++++++-
 1 file changed, 12 insertions(+), 1 deletion(-)

diff --git a/SafeExamBrowser.Configuration/DataResources/NetworkResourceLoader.cs b/SafeExamBrowser.Configuration/DataResources/NetworkResourceLoader.cs
index 6686c19f..6010c006 100644
--- a/SafeExamBrowser.Configuration/DataResources/NetworkResourceLoader.cs
+++ b/SafeExamBrowser.Configuration/DataResources/NetworkResourceLoader.cs
@@ -163,6 +163,17 @@ namespace SafeExamBrowser.Configuration.DataResources
 
 				logger.Debug($"Received response '{ToString(response)}'.");
 
+				if (!isAvailable)
+				{
+					logger.Debug($"HEAD request was not successful, trying GET request for '{uri}'...");
+
+					request = new HttpRequestMessage(HttpMethod.Get, uri);
+					response = Execute(request);
+					isAvailable = response.IsSuccessStatusCode || IsUnauthorized(response);
+
+					logger.Debug($"Received response '{ToString(response)}'.");
+				}
+
 				return isAvailable;
 			}
 			catch (Exception e)
@@ -180,7 +191,7 @@ namespace SafeExamBrowser.Configuration.DataResources
 
 		private string ToString(HttpResponseMessage response)
 		{
-			return $"{(int)response.StatusCode} - {response.ReasonPhrase}";
+			return $"{(int) response.StatusCode} - {response.ReasonPhrase}";
 		}
 	}
 }