ClemensFischer/XAML-Map-Control
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Version 4.13.1 Cache "no tile" responses.

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This commit is contained in:
ClemensF 2019-07-22 19:47:57 +02:00
parent 576dd8e8e7
commit 219171381f
27 changed files with 200 additions and 338 deletions
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42
MapControl/Shared/ImageLoader.cs
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@ -58,6 +58,18 @@ namespace MapControl
return image;
}
internal class HttpResponse
{
public byte[] Buffer { get; }
public TimeSpan? MaxAge { get; }
public HttpResponse(byte[] buffer, TimeSpan? maxAge)
{
Buffer = buffer;
MaxAge = maxAge;
}
}
internal static async Task<HttpResponse> GetHttpResponseAsync(Uri uri, bool continueOnCapturedContext = true)
{
HttpResponse response = null;
@ -65,24 +77,20 @@ namespace MapControl
try
{
using (var responseMessage = await HttpClient
.GetAsync(uri, HttpCompletionOption.ResponseHeadersRead)
.ConfigureAwait(continueOnCapturedContext))
.GetAsync(uri, HttpCompletionOption.ResponseHeadersRead).ConfigureAwait(continueOnCapturedContext))
{
if (responseMessage.IsSuccessStatusCode)
{
IEnumerable<string> tileInfo;
byte[] buffer = null;
if (responseMessage.Headers.TryGetValues("X-VE-Tile-Info", out tileInfo) &&
tileInfo.Contains("no-tile"))
if (!responseMessage.Headers.TryGetValues("X-VE-Tile-Info", out tileInfo) ||
!tileInfo.Contains("no-tile"))
{
response = new HttpResponse(null, null); // no tile image
}
else
{
response = new HttpResponse(
await responseMessage.Content.ReadAsByteArrayAsync().ConfigureAwait(continueOnCapturedContext),
responseMessage.Headers.CacheControl?.MaxAge);
buffer = await responseMessage.Content.ReadAsByteArrayAsync().ConfigureAwait(continueOnCapturedContext);
}
response = new HttpResponse(buffer, responseMessage.Headers.CacheControl?.MaxAge);
}
else
{
@ -97,17 +105,5 @@ namespace MapControl
return response;
}
internal class HttpResponse
{
public byte[] Buffer { get; }
public TimeSpan? MaxAge { get; }
public HttpResponse(byte[] buffer, TimeSpan? maxAge)
{
Buffer = buffer;
MaxAge = maxAge;
}
}
}
}