public async Task <bool> ServeAsync(
IHttpRequest request,
IHttpResponse response)
{
// Early exit for non GET/HEAD request
if (request.Header.Method != HttpRequestMethod.GET &&
request.Header.Method != HttpRequestMethod.HEAD)
{
return(false);
}
// Early exit if the request is not for a file
if (false == _fileServer.TryResolve(request, out string resolvedPathToFile))
{
return(false);
}
// Now write the header and contents
response.Header[HttpKeys.ContentType] =
_fileServer.GetContentTypeHeader(resolvedPathToFile);
using (var fs = _fileServer.OpenRead(resolvedPathToFile))
{
response.Header[HttpKeys.ContentLength] = fs.Length.ToString(CultureInfo.InvariantCulture);
// Write body (only for GET request)
if (request.Header.Method == HttpRequestMethod.GET)
{
await fs.CopyToAsync(response.Body, _tcpSettings.ReadWriteBufferSize);
}
// For HEAD request, we are not sending the body,
// Immediatly flush the header to prevent Content-length
// validation on body upon completion of this request.
else
{
await response.SendHeaderAsync();
}
}
// Return true, as we have served the content
return(true);
}
public static async Task WriteAsync(
this IStaticFileServer inst,
IHttpRequest request,
StaticRangeRequest rangeRequest,
IHttpResponse response,
string pathToContentFile,
int writeBufferSize)
{
Validation.RequireValidBufferSize(writeBufferSize);
// Set headers
response.Header[HttpKeys.ContentType] =
inst.GetContentTypeHeader(pathToContentFile);
// Open the file
using (var fs = inst.OpenRead(pathToContentFile))
{
// The requested range may contains relative values,
// Convert them to absolute values here, as we knew the
// content length
rangeRequest = rangeRequest.ToAbsolute(fs.Length);
// Set headers (cont)
var contentLength = rangeRequest.To - rangeRequest.From + 1L;
response.Header[HttpKeys.ContentLength]
= contentLength.Str();
response.Header[HttpKeys.ContentRange]
= rangeRequest.GenerateRangeHeaderValue(fs.Length);
// Write body (for GET method only)
if (request.Header.Method == HttpRequestMethod.GET)
{
fs.Position = rangeRequest.From;
await fs.CopyToAsync(
response.Body,
count : contentLength,
bufferSize : writeBufferSize);
}
}
}
public static async Task WriteAsync(
this IStaticFileServer staticFileServer,
IHttpRequest request,
StaticRangeRequest[] ranges,
IHttpResponse response,
string pathToContentFile,
int writeBufferSize)
{
var contentType = staticFileServer.GetContentTypeHeader(pathToContentFile);
using (var fs = staticFileServer.OpenRead(pathToContentFile))
{
for (var i = 0; i < ranges.Length; i++)
{
ranges[i] = ranges[i].ToAbsolute(fs.Length);
}
// Write header
var chunks = GenerateChunks(ranges, fs.Length, contentType);
response.Header[HttpKeys.ContentType]
= $"multipart/byteranges; boundary={MultiRangeBoundaryString}";
response.Header[HttpKeys.ContentLength]
= CalculateContentLength(chunks).Str();
// Write body and footer (GET method only)
if (request.Header.Method == HttpRequestMethod.GET)
{
for (var i = 0; i < chunks.Count; i++)
{
await WriteChunkBody(response, writeBufferSize, fs, chunks[i]);
}
await response.Body.WriteAsync(
MultiRangeBoundaryFooterString,
writeBufferSize
);
}
}
}
