public override Task ProcessRequestAsync(HttpContextBase context)
{
string url = context.Request.QueryString["url"];
Uri uri;
if (String.IsNullOrEmpty(url) ||
!ImageContentProvider.IsValidImagePath(url) ||
!Uri.TryCreate(url, UriKind.Absolute, out uri))
{
context.Response.StatusCode = 404;
return(TaskAsyncHelper.Empty);
}
// TODO: Add caching
var request = (HttpWebRequest)WebRequest.Create(url);
var requestTask = Task.Factory.FromAsync((cb, state) => request.BeginGetResponse(cb, state),
ar => (HttpWebResponse)request.EndGetResponse(ar), null);
return(requestTask.Then(response =>
{
context.Response.ContentType = response.ContentType;
context.Response.StatusCode = (int)response.StatusCode;
context.Response.StatusDescription = response.StatusDescription;
using (response)
{
using (Stream stream = response.GetResponseStream())
{
// TODO: Make this async
stream.CopyTo(context.Response.OutputStream);
}
}
}));
}
public async Task Invoke(IDictionary <string, object> env)
{
var httpRequest = new Gate.Request(env);
var httpResponse = new OwinResponse(env);
string url;
Uri uri;
if (!httpRequest.Query.TryGetValue("url", out url) ||
String.IsNullOrEmpty(url) ||
!Uri.TryCreate(url, UriKind.Absolute, out uri) ||
!ImageContentProvider.IsValidImagePath(uri) ||
!IsAuthenticated(env))
{
httpResponse.StatusCode = 404;
return;
}
try
{
var request = (HttpWebRequest)WebRequest.Create(url);
request.CachePolicy = new RequestCachePolicy(RequestCacheLevel.Default);
var response = (HttpWebResponse)await request.GetResponseAsync();
if (!ImageContentProvider.IsValidContentType(response.ContentType) &&
response.ContentLength > _settings.ProxyImageMaxSizeBytes)
{
httpResponse.StatusCode = 404;
return;
}
httpResponse.SetHeader("Content-Type", response.ContentType);
httpResponse.StatusCode = (int)response.StatusCode;
using (response)
{
using (Stream stream = response.GetResponseStream())
{
await stream.CopyToAsync(httpResponse.Body);
}
}
}
catch
{
httpResponse.StatusCode = 404;
}
}
public async Task Invoke(IDictionary <string, object> env)
{
var httpRequest = new OwinRequest(env);
if (!httpRequest.Path.StartsWith(_path))
{
await _next(env);
return;
}
var httpResponse = new OwinResponse(env);
var qs = new QueryStringCollection(httpRequest.QueryString);
string url = qs["url"];
Uri uri;
if (String.IsNullOrEmpty(url) ||
!ImageContentProvider.IsValidImagePath(url) ||
!Uri.TryCreate(url, UriKind.Absolute, out uri))
{
httpResponse.StatusCode = 404;
await TaskAsyncHelper.Empty;
return;
}
var request = (HttpWebRequest)WebRequest.Create(url);
request.CachePolicy = new RequestCachePolicy(RequestCacheLevel.Default);
var response = (HttpWebResponse)await request.GetResponseAsync();
httpResponse.SetHeader("ContentType", response.ContentType);
httpResponse.StatusCode = (int)response.StatusCode;
using (response)
{
using (Stream stream = response.GetResponseStream())
{
await stream.CopyToAsync(httpResponse.Body);
}
}
}
public override Task ProcessRequestAsync(HttpContextBase context)
{
string url = context.Request.QueryString["url"];
Uri uri;
if (String.IsNullOrEmpty(url) ||
!ImageContentProvider.IsValidImagePath(url) ||
!Uri.TryCreate(url, UriKind.Absolute, out uri))
{
context.Response.StatusCode = 404;
return(TaskAsyncHelper.Empty);
}
// Since we only handle requests for imgur and other random images, just cached based on the url
// context.Response.Cache.SetCacheability(HttpCacheability.Public);
// context.Response.Cache.SetMaxAge(TimeSpan.MaxValue);
// context.Response.Cache.SetLastModified(DateTime.Now);
var request = (HttpWebRequest)WebRequest.Create(url);
request.CachePolicy = new RequestCachePolicy(RequestCacheLevel.Default);
var requestTask = Task.Factory.FromAsync((cb, state) => request.BeginGetResponse(cb, state),
ar => (HttpWebResponse)request.EndGetResponse(ar), null);
return(requestTask.Then(response =>
{
context.Response.ContentType = response.ContentType;
context.Response.StatusCode = (int)response.StatusCode;
context.Response.StatusDescription = response.StatusDescription;
using (response)
{
using (Stream stream = response.GetResponseStream())
{
// TODO: Make this async
stream.CopyTo(context.Response.OutputStream);
}
}
}));
}
