void WriteToFile(string path, HttpResponse response)
{
using (Stream stream = fileHandler.OpenWriteStream(path)) {
using (BinaryWriter writer = new BinaryWriter(stream)) {
CacheMetadata meta = new CacheMetadata(response);
writer.Write(CacheMetadata.version);
writer.Write(meta.domain != null);
writer.Write(meta.domain);
writer.Write(meta.path != null);
writer.Write(meta.path);
writer.Write(meta.contentType != null);
writer.Write(meta.contentType);
writer.Write(meta.eTag != null);
writer.Write(meta.eTag);
writer.Write(meta.expireAt.HasValue);
if (meta.expireAt.HasValue)
{
writer.Write(meta.expireAt.Value.ToBinary());
}
writer.Write(meta.lastModified.HasValue);
if (meta.lastModified.HasValue)
{
writer.Write(meta.lastModified.Value.ToBinary());
}
writer.Write(response.MessageBody);
}
}
}
internal HttpResponse Process(HttpRequest request, CacheMetadata cache, Progress progress, CancellationToken cancellationToken)
{
HttpResponse response = new HttpResponse(request);
response.HttpVersion = "HTTP/1.1";
response.StatusCode = 200;
response.StatusPhrase = "OK (cache)";
response.Headers.Append(HeaderField.ContentType, cache.contentType);
response.MessageBody = BuildMessageBodyFromCache(response, progress, cancellationToken);
return(response);
}
internal CacheMetadata FindMetadata(HttpRequest request)
{
string filePath = GetFilePath(request.Uri);
CacheMetadata data = null;
Mutex mutex = new Mutex(false, filePath);
mutex.WaitOne();
try {
if (fileHandler.Exists(filePath))
{
data = ReadMetaData(filePath);
}
}
finally {
mutex.ReleaseMutex();
}
return(data);
}
void AddCacheDirectiveToRequest(HttpRequest request)
{
CacheMetadata cache = cacheHandler.FindMetadata(request);
request.Headers.Remove(HeaderField.IfNoneMatch);
request.Headers.Remove(HeaderField.IfModifiedSince);
if (cache == null)
{
return;
}
if (!string.IsNullOrEmpty(cache.eTag))
{
request.Headers.AddOrReplace(HeaderField.IfNoneMatch, cache.eTag);
}
if (cache.lastModified.HasValue)
{
request.Headers.AddOrReplace(HeaderField.IfModifiedSince, cache.lastModified.Value.ToString("r"));
}
}
