private async Task <IHasOptions> GetStaticResult(IRequest requestContext, StaticResultOptions options, bool compress)
{
var isHeadRequest = options.IsHeadRequest;
var factoryFn = options.ContentFactory;
var contentType = options.ContentType;
var responseHeaders = options.ResponseHeaders;
var requestedCompressionType = requestContext.GetCompressionType();
if (!compress || string.IsNullOrEmpty(requestedCompressionType))
{
var rangeHeader = requestContext.GetHeader("Range");
var stream = await factoryFn().ConfigureAwait(false);
if (!string.IsNullOrEmpty(rangeHeader))
{
return(new RangeRequestWriter(rangeHeader, stream, contentType, isHeadRequest, _logger)
{
OnComplete = options.OnComplete
});
}
responseHeaders["Content-Length"] = stream.Length.ToString(UsCulture);
if (isHeadRequest)
{
stream.Dispose();
return(GetHttpResult(new byte[] { }, contentType));
}
return(new StreamWriter(stream, contentType, _logger)
{
OnComplete = options.OnComplete,
OnError = options.OnError
});
}
string content;
using (var stream = await factoryFn().ConfigureAwait(false))
{
using (var reader = new StreamReader(stream))
{
content = await reader.ReadToEndAsync().ConfigureAwait(false);
}
}
var contents = content.Compress(requestedCompressionType);
responseHeaders["Content-Length"] = contents.Length.ToString(UsCulture);
if (isHeadRequest)
{
return(GetHttpResult(new byte[] { }, contentType));
}
return(new CompressedResult(contents, requestedCompressionType, contentType));
}
public async Task <object> GetStaticResult(IRequest requestContext, StaticResultOptions options)
{
var cacheKey = options.CacheKey;
options.ResponseHeaders = options.ResponseHeaders ?? new Dictionary <string, string>(StringComparer.OrdinalIgnoreCase);
var contentType = options.ContentType;
if (cacheKey == Guid.Empty)
{
throw new ArgumentNullException("cacheKey");
}
if (options.ContentFactory == null)
{
throw new ArgumentNullException("factoryFn");
}
var key = cacheKey.ToString("N");
// See if the result is already cached in the browser
var result = GetCachedResult(requestContext, options.ResponseHeaders, cacheKey, key, options.DateLastModified, options.CacheDuration, contentType);
if (result != null)
{
return(result);
}
var compress = ShouldCompressResponse(requestContext, contentType);
var hasOptions = await GetStaticResult(requestContext, options, compress).ConfigureAwait(false);
AddResponseHeaders(hasOptions, options.ResponseHeaders);
return(hasOptions);
}
private async Task <IHasHeaders> GetStaticResult(IRequest requestContext, StaticResultOptions options, bool compress)
{
var isHeadRequest = options.IsHeadRequest;
var factoryFn = options.ContentFactory;
var contentType = options.ContentType;
var responseHeaders = options.ResponseHeaders;
var requestedCompressionType = GetCompressionType(requestContext);
if (!compress || string.IsNullOrEmpty(requestedCompressionType))
{
var rangeHeader = requestContext.Headers.Get("Range");
if (!isHeadRequest && !string.IsNullOrWhiteSpace(options.Path))
{
return(new FileWriter(options.Path, contentType, rangeHeader, _logger, _fileSystem)
{
OnComplete = options.OnComplete,
OnError = options.OnError,
FileShare = options.FileShare
});
}
if (!string.IsNullOrEmpty(rangeHeader))
{
var stream = await factoryFn().ConfigureAwait(false);
return(new RangeRequestWriter(rangeHeader, stream, contentType, isHeadRequest, _logger)
{
OnComplete = options.OnComplete
});
}
else
{
var stream = await factoryFn().ConfigureAwait(false);
responseHeaders["Content-Length"] = stream.Length.ToString(UsCulture);
if (isHeadRequest)
{
stream.Dispose();
return(GetHttpResult(new byte[] { }, contentType, true));
}
return(new StreamWriter(stream, contentType, _logger)
{
OnComplete = options.OnComplete,
OnError = options.OnError
});
}
}
using (var stream = await factoryFn().ConfigureAwait(false))
{
return(await GetCompressedResult(stream, requestedCompressionType, responseHeaders, isHeadRequest, contentType).ConfigureAwait(false));
}
}
public async Task <object> GetStaticResult(IRequest requestContext, StaticResultOptions options)
{
options.ResponseHeaders = options.ResponseHeaders ?? new Dictionary <string, string>(StringComparer.OrdinalIgnoreCase);
var contentType = options.ContentType;
if (!StringValues.IsNullOrEmpty(requestContext.Headers[HeaderNames.IfModifiedSince]))
{
// See if the result is already cached in the browser
var result = GetCachedResult(requestContext, options.ResponseHeaders, options);
if (result != null)
{
return(result);
}
}
// TODO: We don't really need the option value
var isHeadRequest = options.IsHeadRequest || string.Equals(requestContext.Verb, "HEAD", StringComparison.OrdinalIgnoreCase);
var factoryFn = options.ContentFactory;
var responseHeaders = options.ResponseHeaders;
AddCachingHeaders(responseHeaders, options.CacheDuration, false, options.DateLastModified);
AddAgeHeader(responseHeaders, options.DateLastModified);
var rangeHeader = requestContext.Headers[HeaderNames.Range];
if (!isHeadRequest && !string.IsNullOrEmpty(options.Path))
{
var hasHeaders = new FileWriter(options.Path, contentType, rangeHeader, _logger, _fileSystem, _streamHelper)
{
OnComplete = options.OnComplete,
OnError = options.OnError,
FileShare = options.FileShare
};
AddResponseHeaders(hasHeaders, options.ResponseHeaders);
return(hasHeaders);
}
var stream = await factoryFn().ConfigureAwait(false);
var totalContentLength = options.ContentLength;
if (!totalContentLength.HasValue)
{
try
{
totalContentLength = stream.Length;
}
catch (NotSupportedException)
{
}
}
if (!string.IsNullOrWhiteSpace(rangeHeader) && totalContentLength.HasValue)
{
var hasHeaders = new RangeRequestWriter(rangeHeader, totalContentLength.Value, stream, contentType, isHeadRequest, _logger)
{
OnComplete = options.OnComplete
};
AddResponseHeaders(hasHeaders, options.ResponseHeaders);
return(hasHeaders);
}
else
{
if (totalContentLength.HasValue)
{
responseHeaders["Content-Length"] = totalContentLength.Value.ToString(CultureInfo.InvariantCulture);
}
if (isHeadRequest)
{
using (stream)
{
return(GetHttpResult(requestContext, Array.Empty <byte>(), contentType, true, responseHeaders));
}
}
var hasHeaders = new StreamWriter(stream, contentType)
{
OnComplete = options.OnComplete,
OnError = options.OnError
};
AddResponseHeaders(hasHeaders, options.ResponseHeaders);
return(hasHeaders);
}
}
/// <summary>
/// Pres the process optimized result.
/// </summary>
private object GetCachedResult(IRequest requestContext, IDictionary <string, string> responseHeaders, StaticResultOptions options)
{
bool noCache = (requestContext.Headers[HeaderNames.CacheControl].ToString()).IndexOf("no-cache", StringComparison.OrdinalIgnoreCase) != -1;
AddCachingHeaders(responseHeaders, options.CacheDuration, noCache, options.DateLastModified);
if (!noCache)
{
DateTime.TryParse(requestContext.Headers[HeaderNames.IfModifiedSince], out var ifModifiedSinceHeader);
if (IsNotModified(ifModifiedSinceHeader, options.CacheDuration, options.DateLastModified))
{
AddAgeHeader(responseHeaders, options.DateLastModified);
var result = new HttpResult(Array.Empty <byte>(), options.ContentType ?? "text/html", HttpStatusCode.NotModified);
AddResponseHeaders(result, responseHeaders);
return(result);
}
}
return(null);
}
/// <summary>
/// Pres the process optimized result.
/// </summary>
private object GetCachedResult(IRequest requestContext, IDictionary <string, string> responseHeaders, StaticResultOptions options)
{
bool noCache = (requestContext.Headers[HeaderNames.CacheControl].ToString()).IndexOf("no-cache", StringComparison.OrdinalIgnoreCase) != -1;
AddCachingHeaders(responseHeaders, options.CacheDuration, noCache, options.DateLastModified);
if (!noCache)
{
if (!DateTime.TryParseExact(requestContext.Headers[HeaderNames.IfModifiedSince], HttpDateFormat, _enUSculture, DateTimeStyles.AssumeUniversal | DateTimeStyles.AdjustToUniversal, out var ifModifiedSinceHeader))
{
_logger.LogDebug("Failed to parse If-Modified-Since header date: {0}", requestContext.Headers[HeaderNames.IfModifiedSince]);
return(null);
}
if (IsNotModified(ifModifiedSinceHeader, options.CacheDuration, options.DateLastModified))
{
AddAgeHeader(responseHeaders, options.DateLastModified);
var result = new HttpResult(Array.Empty <byte>(), options.ContentType ?? "text/html", HttpStatusCode.NotModified);
AddResponseHeaders(result, responseHeaders);
return(result);
}
}
return(null);
}
public async Task <object> GetStaticResult(IRequest requestContext, StaticResultOptions options)
{
var cacheKey = options.CacheKey;
options.ResponseHeaders = options.ResponseHeaders ?? new Dictionary <string, string>(StringComparer.OrdinalIgnoreCase);
var contentType = options.ContentType;
if (cacheKey == Guid.Empty)
{
throw new ArgumentNullException("cacheKey");
}
var key = cacheKey.ToString("N");
// See if the result is already cached in the browser
var result = GetCachedResult(requestContext, options.ResponseHeaders, cacheKey, key, options.DateLastModified, options.CacheDuration, contentType);
if (result != null)
{
return(result);
}
// TODO: We don't really need the option value
var isHeadRequest = options.IsHeadRequest || string.Equals(requestContext.Verb, "HEAD", StringComparison.OrdinalIgnoreCase);
var factoryFn = options.ContentFactory;
var responseHeaders = options.ResponseHeaders;
//var requestedCompressionType = GetCompressionType(requestContext);
var rangeHeader = requestContext.Headers.Get("Range");
if (!isHeadRequest && !string.IsNullOrEmpty(options.Path))
{
var hasHeaders = new FileWriter(options.Path, contentType, rangeHeader, _logger, _fileSystem)
{
OnComplete = options.OnComplete,
OnError = options.OnError,
FileShare = options.FileShare
};
AddResponseHeaders(hasHeaders, options.ResponseHeaders);
return(hasHeaders);
}
if (!string.IsNullOrWhiteSpace(rangeHeader))
{
var stream = await factoryFn().ConfigureAwait(false);
var hasHeaders = new RangeRequestWriter(rangeHeader, stream, contentType, isHeadRequest, _logger)
{
OnComplete = options.OnComplete
};
AddResponseHeaders(hasHeaders, options.ResponseHeaders);
return(hasHeaders);
}
else
{
var stream = await factoryFn().ConfigureAwait(false);
responseHeaders["Content-Length"] = stream.Length.ToString(UsCulture);
if (isHeadRequest)
{
stream.Dispose();
return(GetHttpResult(requestContext, new byte[] { }, contentType, true, responseHeaders));
}
var hasHeaders = new StreamWriter(stream, contentType, _logger)
{
OnComplete = options.OnComplete,
OnError = options.OnError
};
AddResponseHeaders(hasHeaders, options.ResponseHeaders);
return(hasHeaders);
}
}
public async Task <object> GetStaticResult(IRequest requestContext, StaticResultOptions options)
{
options.ResponseHeaders = options.ResponseHeaders ?? new Dictionary <string, string>(StringComparer.OrdinalIgnoreCase);
var contentType = options.ContentType;
var etag = requestContext.Headers.Get("If-None-Match");
var cacheKey = etag != null ? new Guid(etag.Trim('\"')) : Guid.Empty;
if (!cacheKey.Equals(Guid.Empty))
{
var key = cacheKey.ToString("N");
// See if the result is already cached in the browser
var result = GetCachedResult(requestContext, options.ResponseHeaders, cacheKey, key, options.DateLastModified, options.CacheDuration, contentType);
if (result != null)
{
return(result);
}
}
// TODO: We don't really need the option value
var isHeadRequest = options.IsHeadRequest || string.Equals(requestContext.Verb, "HEAD", StringComparison.OrdinalIgnoreCase);
var factoryFn = options.ContentFactory;
var responseHeaders = options.ResponseHeaders;
var rangeHeader = requestContext.Headers.Get("Range");
if (!isHeadRequest && !string.IsNullOrEmpty(options.Path))
{
var hasHeaders = new FileWriter(options.Path, contentType, rangeHeader, _logger, _fileSystem)
{
OnComplete = options.OnComplete,
OnError = options.OnError,
FileShare = options.FileShare
};
AddResponseHeaders(hasHeaders, options.ResponseHeaders);
// Generate an ETag based on identifying information - TODO read contents from filesystem instead?
var responseId = $"{hasHeaders.ContentType}{options.Path}{hasHeaders.TotalContentLength}";
var hashedId = MD5.Create().ComputeHash(Encoding.Default.GetBytes(responseId));
hasHeaders.Headers["ETag"] = new Guid(hashedId).ToString("N");
return(hasHeaders);
}
var stream = await factoryFn().ConfigureAwait(false);
// Generate an etag based on stream content
var streamHash = MD5.Create().ComputeHash(stream);
var newEtag = new Guid(streamHash).ToString("N");
// reset position so the response can re-use it -- TODO is this ok?
stream.Position = 0;
var totalContentLength = options.ContentLength;
if (!totalContentLength.HasValue)
{
try
{
totalContentLength = stream.Length;
}
catch (NotSupportedException)
{
}
}
if (!string.IsNullOrWhiteSpace(rangeHeader) && totalContentLength.HasValue)
{
var hasHeaders = new RangeRequestWriter(rangeHeader, totalContentLength.Value, stream, contentType, isHeadRequest, _logger)
{
OnComplete = options.OnComplete
};
AddResponseHeaders(hasHeaders, options.ResponseHeaders);
hasHeaders.Headers["ETag"] = newEtag;
return(hasHeaders);
}
else
{
if (totalContentLength.HasValue)
{
responseHeaders["Content-Length"] = totalContentLength.Value.ToString(UsCulture);
}
if (isHeadRequest)
{
using (stream)
{
return(GetHttpResult(requestContext, Array.Empty <byte>(), contentType, true, responseHeaders));
}
}
var hasHeaders = new StreamWriter(stream, contentType, _logger)
{
OnComplete = options.OnComplete,
OnError = options.OnError
};
AddResponseHeaders(hasHeaders, options.ResponseHeaders);
hasHeaders.Headers["ETag"] = newEtag;
return(hasHeaders);
}
}