public CachingProxy(RequestDelegate next, IWebHostEnvironment hostingEnv,
ILoggerFactory loggerFactory, IOptions <CachingProxyConfig> config, ProxyHttpClient httpClient)
{
myLogger = loggerFactory.CreateLogger(GetType().FullName);
myLogger.LogWarning("Initialising. Config:\n" + config.Value);
myNext = next;
myHttpClient = httpClient;
myMinimumFreeDiskSpaceMb = config.Value.MinimumFreeDiskSpaceMb;
myLocalCachePath = config.Value.LocalCachePath;
if (myLocalCachePath == null)
{
throw new ArgumentNullException("", "LocalCachePath could not be null");
}
if (!Directory.Exists(myLocalCachePath))
{
throw new ArgumentException("LocalCachePath doesn't exist: " + myLocalCachePath);
}
myRemoteServers = new RemoteServers(config.Value.Prefixes.ToList(), config.Value.ContentTypeValidationPrefixes.ToList());
foreach (var remoteServer in myRemoteServers.Servers)
{
// force reconnection (and DNS re-resolve) every two minutes
ServicePointManager.FindServicePoint(remoteServer.RemoteUri).ConnectionLeaseTimeout = 120000;
}
myContentTypeProvider = new FileExtensionContentTypeProvider();
myCacheFileProvider = new CacheFileProvider(myLocalCachePath);
var staticFileOptions = new StaticFileOptions
{
FileProvider = myCacheFileProvider,
ServeUnknownFileTypes = true,
HttpsCompression = HttpsCompressionMode.DoNotCompress,
ContentTypeProvider = myContentTypeProvider,
OnPrepareResponse = ctx =>
{
SetStatusHeader(ctx.Context, CachingProxyStatus.HIT);
AddEternalCachingControl(ctx.Context);
}
};
myStaticFileMiddleware =
new StaticFileMiddleware(next, hostingEnv, Options.Create(staticFileOptions), loggerFactory);
myBlacklistRegex = !string.IsNullOrWhiteSpace(config.Value.BlacklistUrlRegex)
? new Regex(config.Value.BlacklistUrlRegex, RegexOptions.Compiled)
: null;
myRedirectToRemoteUrlsRegex = !string.IsNullOrWhiteSpace(config.Value.RedirectToRemoteUrlsRegex)
? new Regex(config.Value.RedirectToRemoteUrlsRegex, RegexOptions.Compiled)
: null;
}
