/// <summary>
/// Gets the value of the x-ms-date or Date header.
/// </summary>
/// <param name="request">The request where the value is read from.</param>
/// <returns>The value of the x-ms-date or Date header.</returns>
public static string GetPreferredDateHeaderValue(HttpRequestMessage request)
{
string microsoftDateHeaderValue = HttpResponseMessageUtils.GetHeaderSingleValueOrDefault(request.Headers, Constants.HeaderConstants.Date);
if (!string.IsNullOrEmpty(microsoftDateHeaderValue))
{
return(microsoftDateHeaderValue);
}
return(AuthenticationUtility.GetCanonicalizedHeaderValue(request.Headers.Date));
}
/// <summary>
/// Appends the value of the Date header (or, optionally, the x-ms-date header) to the specified canonicalized string.
/// </summary>
/// <param name="canonicalizedString">The canonicalized string where the value is appended.</param>
/// <param name="request">The request where the value is read from.</param>
/// <param name="allowMicrosoftDateHeader">true if the value of the x-ms-date header can be used and is preferred; otherwise, false.</param>
public static void AppendCanonicalizedDateHeader(CanonicalizedString canonicalizedString, HttpRequestMessage request, bool allowMicrosoftDateHeader = false)
{
string microsoftDateHeaderValue = HttpResponseMessageUtils.GetHeaderSingleValueOrDefault(request.Headers, Constants.HeaderConstants.Date);
if (string.IsNullOrEmpty(microsoftDateHeaderValue))
{
canonicalizedString.AppendCanonicalizedElement(AuthenticationUtility.GetCanonicalizedHeaderValue(request.Headers.Date));
}
else if (allowMicrosoftDateHeader)
{
canonicalizedString.AppendCanonicalizedElement(microsoftDateHeaderValue);
}
else
{
canonicalizedString.AppendCanonicalizedElement(null);
}
}