public static bool IsModifiedOrNoneMatch(string ifNoneMatch, string ifModifiedSince, string resourceVersionNumber, DateTimeOffset?lastModified)
{
if (!string.IsNullOrWhiteSpace(ifNoneMatch))
{
if (resourceVersionNumber != HttpHeaderSupport.GetETagValueFromETagString(ifNoneMatch.Trim()))
{
return(true);
}
}
if (!string.IsNullOrWhiteSpace(ifModifiedSince))
{
DateTimeOffset?ifModifiedSinceDateTimeOffset = HttpHeaderSupport.ParseHttpDate(ifModifiedSince);
if (!ifModifiedSinceDateTimeOffset.HasValue)
{
string ErrorMessage = "if-Modified-Since value could not be converted to a DateTime. The value found was: " + ifModifiedSince;
var Operationoutcome = Common.Tools.FhirOperationOutcomeSupport.Create(OperationOutcome.IssueSeverity.Fatal, OperationOutcome.IssueType.Exception, ErrorMessage);
throw new PyroException(System.Net.HttpStatusCode.InternalServerError, Operationoutcome, ErrorMessage);
}
//Remove the milliseconds
lastModified = new DateTimeOffset(lastModified.Value.Year, lastModified.Value.Month, lastModified.Value.Day, lastModified.Value.Hour, lastModified.Value.Minute, lastModified.Value.Second, 0, lastModified.Value.Offset);
ifModifiedSinceDateTimeOffset = new DateTimeOffset(ifModifiedSinceDateTimeOffset.Value.Year, ifModifiedSinceDateTimeOffset.Value.Month, ifModifiedSinceDateTimeOffset.Value.Day, ifModifiedSinceDateTimeOffset.Value.Hour, ifModifiedSinceDateTimeOffset.Value.Minute, ifModifiedSinceDateTimeOffset.Value.Second, 0, ifModifiedSinceDateTimeOffset.Value.Offset);
if (lastModified > ifModifiedSinceDateTimeOffset)
{
return(true);
}
}
return(false);
}
/// <summary>
/// Expects a Etag string e.g(W/"3141") and returns 3214 as a string
/// </summary>
/// <param name="ETag"></param>
/// <returns>EntityTagHeaderValue</returns>
public static string GetETagValueFromETagString(string ETag)
{
EntityTagHeaderValue TempEtag = HttpHeaderSupport.GetETagEntityTagHeaderValueFromETagString(ETag);
return(TempEtag.Tag.Trim(new Char[] { '\"' }));
}