/// <summary>Download link and have it be the response.</summary>
/// <param name="req">the http request</param>
/// <param name="resp">the http response</param>
/// <param name="link">the link to download</param>
/// <param name="c">the cookie to set if any</param>
/// <exception cref="System.IO.IOException">on any error.</exception>
private static void ProxyLink(HttpServletRequest req, HttpServletResponse resp, URI
link, Cookie c, string proxyHost)
{
DefaultHttpClient client = new DefaultHttpClient();
client.GetParams().SetParameter(ClientPNames.CookiePolicy, CookiePolicy.BrowserCompatibility
).SetBooleanParameter(ClientPNames.AllowCircularRedirects, true);
// Make sure we send the request from the proxy address in the config
// since that is what the AM filter checks against. IP aliasing or
// similar could cause issues otherwise.
IPAddress localAddress = Sharpen.Extensions.GetAddressByName(proxyHost);
if (Log.IsDebugEnabled())
{
Log.Debug("local InetAddress for proxy host: {}", localAddress);
}
client.GetParams().SetParameter(ConnRoutePNames.LocalAddress, localAddress);
HttpGet httpGet = new HttpGet(link);
Enumeration <string> names = req.GetHeaderNames();
while (names.MoveNext())
{
string name = names.Current;
if (passThroughHeaders.Contains(name))
{
string value = req.GetHeader(name);
if (Log.IsDebugEnabled())
{
Log.Debug("REQ HEADER: {} : {}", name, value);
}
httpGet.SetHeader(name, value);
}
}
string user = req.GetRemoteUser();
if (user != null && !user.IsEmpty())
{
httpGet.SetHeader("Cookie", ProxyUserCookieName + "=" + URLEncoder.Encode(user, "ASCII"
));
}
OutputStream @out = resp.GetOutputStream();
try
{
HttpResponse httpResp = client.Execute(httpGet);
resp.SetStatus(httpResp.GetStatusLine().GetStatusCode());
foreach (Header header in httpResp.GetAllHeaders())
{
resp.SetHeader(header.GetName(), header.GetValue());
}
if (c != null)
{
resp.AddCookie(c);
}
InputStream @in = httpResp.GetEntity().GetContent();
if (@in != null)
{
IOUtils.CopyBytes(@in, @out, 4096, true);
}
}
finally
{
httpGet.ReleaseConnection();
}
}