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-rw-r--r--src/DotNetOpenAuth.Core/Messaging/MessagingUtilities.cs3
1 files changed, 2 insertions, 1 deletions
diff --git a/src/DotNetOpenAuth.Core/Messaging/MessagingUtilities.cs b/src/DotNetOpenAuth.Core/Messaging/MessagingUtilities.cs
index 69b111d..e97da5b 100644
--- a/src/DotNetOpenAuth.Core/Messaging/MessagingUtilities.cs
+++ b/src/DotNetOpenAuth.Core/Messaging/MessagingUtilities.cs
@@ -1927,7 +1927,8 @@ namespace DotNetOpenAuth.Messaging {
// the public URL:
if (serverVariables["HTTP_HOST"] != null) {
ErrorUtilities.VerifySupported(request.Url.Scheme == Uri.UriSchemeHttps || request.Url.Scheme == Uri.UriSchemeHttp, "Only HTTP and HTTPS are supported protocols.");
- string scheme = serverVariables["HTTP_X_FORWARDED_PROTO"] ?? request.Url.Scheme;
+ string scheme = serverVariables["HTTP_X_FORWARDED_PROTO"] ??
+ (String.Equals(serverVariables["HTTP_FRONT_END_HTTPS"], "on", StringComparison.OrdinalIgnoreCase) ? Uri.UriSchemeHttps : request.Url.Scheme);
Uri hostAndPort = new Uri(scheme + Uri.SchemeDelimiter + serverVariables["HTTP_HOST"]);
UriBuilder publicRequestUri = new UriBuilder(request.Url);
publicRequestUri.Scheme = scheme;