public void ToString_UseDifferentRanges_AllSerializedCorrectly()
{
ContentRangeHeaderValue range = new ContentRangeHeaderValue(1, 2, 3);
range.Unit = "myunit";
Assert.Equal("myunit 1-2/3", range.ToString()); // "Range with all fields set"
range = new ContentRangeHeaderValue(123456789012345678, 123456789012345679);
Assert.Equal("bytes 123456789012345678-123456789012345679/*", range.ToString()); // "Only range, no length"
range = new ContentRangeHeaderValue(150);
Assert.Equal("bytes */150", range.ToString()); // "Only length, no range"
}
/// <summary>
/// Run a simple HTTP server that listens for a few test URIs.
/// The server exits when a client requests "/Quit".
/// </summary>
/// <param name="prefix">Prefix at which the server should listen</param>
private async Task RunTestServer(string prefix)
{
using (var httpListener = new HttpListener())
{
httpListener.Prefixes.Add(prefix);
httpListener.Start();
while (httpListener.IsListening)
{
var context = await httpListener.GetContextAsync();
var requestUri = context.Request.Url;
var response = context.Response;
if (requestUri.AbsolutePath.EndsWith("/Quit"))
{
// Shut down the HTTP server.
response.Close();
httpListener.Stop();
continue;
}
// All downloader requests should include ?alt=media.
Assert.AreEqual("media", context.Request.QueryString["alt"]);
response.ContentType = "text/plain";
response.SendChunked = true; // Avoid having to set Content-Length.
Stream outStream = new MemoryStream();
if (requestUri.AbsolutePath.EndsWith("/EchoUrl"))
{
// Return the URL that we saw.
byte[] uriBytes = Encoding.UTF8.GetBytes(requestUri.AbsoluteUri);
outStream.Write(uriBytes, 0, uriBytes.Length);
}
else if (requestUri.AbsolutePath.EndsWith("/BadRequestJson"))
{
// Return 400 with a JSON-encoded error.
var apiResponse = new StandardResponse<object> { Error = BadRequestError };
var apiResponseText = new NewtonsoftJsonSerializer().Serialize(apiResponse);
byte[] apiResponseBytes = Encoding.UTF8.GetBytes(apiResponseText);
response.StatusCode = (int)HttpStatusCode.BadRequest;
outStream.Write(apiResponseBytes, 0, apiResponseBytes.Length);
}
else if (requestUri.AbsolutePath.EndsWith("/NotFoundPlainText"))
{
// Return 404 with a plaintext error.
response.StatusCode = (int)HttpStatusCode.NotFound;
byte[] errorBytes = Encoding.UTF8.GetBytes(NotFoundError);
outStream.Write(errorBytes, 0, errorBytes.Length);
}
else if (requestUri.AbsolutePath.EndsWith("/GzipContent"))
{
// Return gzip-compressed content.
using (var gzipStream = new GZipStream(outStream, CompressionMode.Compress, true))
{
gzipStream.Write(MediaContent, 0, MediaContent.Length);
}
response.AddHeader("Content-Encoding", "gzip");
}
else
{
// Return plaintext content.
outStream.Write(MediaContent, 0, MediaContent.Length);
}
outStream.Position = 0;
// Provide rudimentary, non-robust support for Range.
// MediaDownloader doesn't exercise this code anymore, but it was useful for
// testing previous implementations that did. It remains for posterity.
string rangeHeader = context.Request.Headers["Range"];
if (rangeHeader != null && response.StatusCode == (int)HttpStatusCode.OK)
{
var range = RangeHeaderValue.Parse(rangeHeader);
var firstRange = range.Ranges.First();
long from = firstRange.From ?? 0;
long to = Math.Min(outStream.Length - 1, firstRange.To ?? long.MaxValue);
var contentRangeHeader = new ContentRangeHeaderValue(from, to, outStream.Length);
response.AddHeader("Content-Range", contentRangeHeader.ToString());
outStream.Position = from;
outStream.SetLength(to + 1);
}
await outStream.CopyToAsync(response.OutputStream);
response.Close();
}
}
}
