public static void RedirectToErrorPage(HttpServletResponse res, Exception e, string
path, bool devMode)
{
string st = devMode ? ErrorPage.ToStackTrace(e, 1024 * 3) : "See logs for stack trace";
// spec: min 4KB
res.SetStatus(res.ScFound);
Cookie cookie = new Cookie(StatusCookie, 500.ToString());
cookie.SetPath(path);
res.AddCookie(cookie);
cookie = new Cookie(ErrorCookie, st);
cookie.SetPath(path);
res.AddCookie(cookie);
res.SetHeader("Location", path);
}
public static void RemoveCookie(HttpServletResponse res, string name, string path
)
{
Log.Debug("removing cookie {} on {}", name, path);
Cookie c = new Cookie(name, string.Empty);
c.SetMaxAge(0);
c.SetPath(path);
res.AddCookie(c);
}
/// <summary>Warn the user that the link may not be safe!</summary>
/// <param name="resp">the http response</param>
/// <param name="link">the link to point to</param>
/// <param name="user">the user that owns the link.</param>
/// <exception cref="System.IO.IOException">on any error.</exception>
private static void WarnUserPage(HttpServletResponse resp, string link, string user
, ApplicationId id)
{
//Set the cookie when we warn which overrides the query parameter
//This is so that if a user passes in the approved query parameter without
//having first visited this page then this page will still be displayed
resp.AddCookie(MakeCheckCookie(id, false));
resp.SetContentType(MimeType.Html);
WebAppProxyServlet.Page p = new WebAppProxyServlet.Page(resp.GetWriter());
p.Html().H1("WARNING: The following page may not be safe!").H3().("click ").A(link
, "here").(" to continue to an Application Master web interface owned by ", user
).().();
}
/// <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();
}
}