// TODO: refresh the file when it gets old
public override async Task<Tuple<bool, INuGetResource>> TryCreate(SourceRepository source, CancellationToken token)
{
ServiceIndexResourceV3 index = null;
string url = source.PackageSource.Source;
// the file type can easily rule out if we need to request the url
if (url.EndsWith(".json", StringComparison.OrdinalIgnoreCase))
{
// check the cache before downloading the file
if (!_cache.TryGetValue(url, out index))
{
var messageHandlerResource = await source.GetResourceAsync<HttpHandlerResource>(token);
DataClient client = new DataClient(messageHandlerResource.MessageHandler);
JObject json = await client.GetJObjectAsync(new Uri(url), token);
if (json != null)
{
// Use SemVer instead of NuGetVersion, the service index should always be
// in strict SemVer format
SemanticVersion version = null;
var status = json.Value<string>("version");
if (status != null && SemanticVersion.TryParse(status, out version))
{
if (version.Major == 3)
{
index = new ServiceIndexResourceV3(json, DateTime.UtcNow);
}
}
}
}
// cache the value even if it is null to avoid checking it again later
_cache.TryAdd(url, index);
}
return new Tuple<bool, INuGetResource>(index != null, index);
}
// TODO: refresh the file when it gets old
public override async Task<Tuple<bool, INuGetResource>> TryCreate(SourceRepository source, CancellationToken token)
{
ServiceIndexResourceV3 index = null;
var url = source.PackageSource.Source;
// the file type can easily rule out if we need to request the url
if (source.PackageSource.ProtocolVersion == 3 ||
(source.PackageSource.IsHttp &&
url.EndsWith(".json", StringComparison.OrdinalIgnoreCase)))
{
ServiceIndexCacheInfo cacheInfo;
// check the cache before downloading the file
if (!_cache.TryGetValue(url, out cacheInfo) ||
UtcNow - cacheInfo.CachedTime > MaxCacheDuration)
{
var messageHandlerResource = await source.GetResourceAsync<HttpHandlerResource>(token);
var client = new DataClient(messageHandlerResource.MessageHandler);
JObject json;
try
{
json = await client.GetJObjectAsync(new Uri(url), token);
}
catch (JsonReaderException)
{
_cache.TryAdd(url, new ServiceIndexCacheInfo { CachedTime = UtcNow });
return new Tuple<bool, INuGetResource>(false, null);
}
catch (HttpRequestException)
{
_cache.TryAdd(url, new ServiceIndexCacheInfo { CachedTime = UtcNow });
return new Tuple<bool, INuGetResource>(false, null);
}
if (json != null)
{
// Use SemVer instead of NuGetVersion, the service index should always be
// in strict SemVer format
SemanticVersion version;
JToken versionToken;
if (json.TryGetValue("version", out versionToken) &&
versionToken.Type == JTokenType.String &&
SemanticVersion.TryParse((string)versionToken, out version) &&
version.Major == 3)
{
index = new ServiceIndexResourceV3(json, UtcNow);
}
}
}
else
{
index = cacheInfo.Index;
}
// cache the value even if it is null to avoid checking it again later
_cache.TryAdd(url, new ServiceIndexCacheInfo { CachedTime = UtcNow, Index = index });
}
return new Tuple<bool, INuGetResource>(index != null, index);
}
public async Task DataClient_Basic_NoCache()
{
int count = 0;
TestHandler handler = new TestHandler((request) =>
{
count++;
var response = new HttpResponseMessage(HttpStatusCode.OK);
response.Content = new TestContent(TestJson.BasicGraph);
return response;
});
using (var client = new DataClient(handler))
{
var json = await client.GetJObjectAsync(new Uri("http://test/doc"));
json = await client.GetJObjectAsync(new Uri("http://test/doc"));
json = await client.GetJObjectAsync(new Uri("http://test/doc"));
Assert.Equal(3, count);
}
}
public async Task DataClient_Basic()
{
TestHandler handler = new TestHandler((request) =>
{
var response = new HttpResponseMessage(HttpStatusCode.OK);
response.Content = new TestContent(TestJson.BasicGraph);
return response;
});
using (var client = new DataClient(handler))
{
var json = await client.GetJObjectAsync(new Uri("http://test/doc"));
Assert.Equal("test", json["name"].ToString());
}
}
public async Task DataClient_GetFile_404()
{
int count = 0;
TestHandler handler = new TestHandler((request) =>
{
count++;
var response = new HttpResponseMessage(HttpStatusCode.NotFound);
response.Content = new TestContent(TestJson.BasicGraph);
return response;
});
RetryHandler retryHandler = new RetryHandler(handler, 2);
using (var client = new DataClient(retryHandler))
{
var json = await client.GetJObjectAsync(new Uri("http://test/doc"));
Assert.Equal(2, count);
}
}
