/// <summary>
/// Extract a query string parameter without triggering http parameters
/// processing by the servlet container.
/// </summary>
/// <param name="request">the request</param>
/// <param name="name">the parameter to get the value.</param>
/// <returns>
/// the parameter value, or <code>NULL</code> if the parameter is not
/// defined.
/// </returns>
/// <exception cref="System.IO.IOException">thrown if there was an error parsing the query string.
/// </exception>
public static string GetParameter(HttpServletRequest request, string name)
{
IList <NameValuePair> list = URLEncodedUtils.Parse(request.GetQueryString(), Utf8Charset
);
if (list != null)
{
foreach (NameValuePair nv in list)
{
if (name.Equals(nv.GetName()))
{
return(nv.GetValue());
}
}
}
return(null);
}
private string GetUserName(HttpServletRequest request)
{
IList <NameValuePair> list = URLEncodedUtils.Parse(request.GetQueryString(), Utf8Charset
);
if (list != null)
{
foreach (NameValuePair nv in list)
{
if (PseudoAuthenticator.UserName.Equals(nv.GetName()))
{
return(nv.GetValue());
}
}
}
return(null);
}
internal static string GetDoAs(HttpServletRequest request)
{
IList <NameValuePair> list = URLEncodedUtils.Parse(request.GetQueryString(), Utf8Charset
);
if (list != null)
{
foreach (NameValuePair nv in list)
{
if (Runtime.EqualsIgnoreCase(DelegationTokenAuthenticatedURL.DoAs, nv.GetName
()))
{
return(nv.GetValue());
}
}
}
return(null);
}
/// <exception cref="System.IO.IOException"/>
protected override void DoGet(HttpServletRequest req, HttpServletResponse resp)
{
try
{
string userApprovedParamS = req.GetParameter(ProxyUriUtils.ProxyApprovalParam);
bool userWasWarned = false;
bool userApproved = Sharpen.Extensions.ValueOf(userApprovedParamS);
bool securityEnabled = IsSecurityEnabled();
string remoteUser = req.GetRemoteUser();
string pathInfo = req.GetPathInfo();
string[] parts = pathInfo.Split("/", 3);
if (parts.Length < 2)
{
Log.Warn("{} gave an invalid proxy path {}", remoteUser, pathInfo);
NotFound(resp, "Your path appears to be formatted incorrectly.");
return;
}
//parts[0] is empty because path info always starts with a /
string appId = parts[1];
string rest = parts.Length > 2 ? parts[2] : string.Empty;
ApplicationId id = Apps.ToAppID(appId);
if (id == null)
{
Log.Warn("{} attempting to access {} that is invalid", remoteUser, appId);
NotFound(resp, appId + " appears to be formatted incorrectly.");
return;
}
if (securityEnabled)
{
string cookieName = GetCheckCookieName(id);
Cookie[] cookies = req.GetCookies();
if (cookies != null)
{
foreach (Cookie c in cookies)
{
if (cookieName.Equals(c.GetName()))
{
userWasWarned = true;
userApproved = userApproved || Sharpen.Extensions.ValueOf(c.GetValue());
break;
}
}
}
}
bool checkUser = securityEnabled && (!userWasWarned || !userApproved);
AppReportFetcher.FetchedAppReport fetchedAppReport = null;
ApplicationReport applicationReport = null;
try
{
fetchedAppReport = GetApplicationReport(id);
if (fetchedAppReport != null)
{
if (fetchedAppReport.GetAppReportSource() != AppReportFetcher.AppReportSource.Rm &&
fetchedAppReport.GetAppReportSource() != AppReportFetcher.AppReportSource.Ahs)
{
throw new NotSupportedException("Application report not " + "fetched from RM or history server."
);
}
applicationReport = fetchedAppReport.GetApplicationReport();
}
}
catch (ApplicationNotFoundException)
{
applicationReport = null;
}
if (applicationReport == null)
{
Log.Warn("{} attempting to access {} that was not found", remoteUser, id);
URI toFetch = ProxyUriUtils.GetUriFromTrackingPlugins(id, this.trackingUriPlugins
);
if (toFetch != null)
{
ProxyUtils.SendRedirect(req, resp, toFetch.ToString());
return;
}
NotFound(resp, "Application " + appId + " could not be found " + "in RM or history server"
);
return;
}
string original = applicationReport.GetOriginalTrackingUrl();
URI trackingUri;
if (original == null || original.Equals("N/A") || original.Equals(string.Empty))
{
if (fetchedAppReport.GetAppReportSource() == AppReportFetcher.AppReportSource.Rm)
{
// fallback to ResourceManager's app page if no tracking URI provided
// and Application Report was fetched from RM
Log.Debug("Original tracking url is '{}'. Redirecting to RM app page", original ==
null ? "NULL" : original);
ProxyUtils.SendRedirect(req, resp, StringHelper.Pjoin(rmAppPageUrlBase, id.ToString
()));
}
else
{
if (fetchedAppReport.GetAppReportSource() == AppReportFetcher.AppReportSource.Ahs)
{
// fallback to Application History Server app page if the application
// report was fetched from AHS
Log.Debug("Original tracking url is '{}'. Redirecting to AHS app page", original
== null ? "NULL" : original);
ProxyUtils.SendRedirect(req, resp, StringHelper.Pjoin(ahsAppPageUrlBase, id.ToString
()));
}
}
return;
}
else
{
if (ProxyUriUtils.GetSchemeFromUrl(original).IsEmpty())
{
trackingUri = ProxyUriUtils.GetUriFromAMUrl(WebAppUtils.GetHttpSchemePrefix(conf)
, original);
}
else
{
trackingUri = new URI(original);
}
}
string runningUser = applicationReport.GetUser();
if (checkUser && !runningUser.Equals(remoteUser))
{
Log.Info("Asking {} if they want to connect to the " + "app master GUI of {} owned by {}"
, remoteUser, appId, runningUser);
WarnUserPage(resp, ProxyUriUtils.GetPathAndQuery(id, rest, req.GetQueryString(),
true), runningUser, id);
return;
}
// Append the user-provided path and query parameter to the original
// tracking url.
IList <NameValuePair> queryPairs = URLEncodedUtils.Parse(req.GetQueryString(), null
);
UriBuilder builder = UriBuilder.FromUri(trackingUri);
foreach (NameValuePair pair in queryPairs)
{
builder.QueryParam(pair.GetName(), pair.GetValue());
}
URI toFetch_1 = builder.Path(rest).Build();
Log.Info("{} is accessing unchecked {}" + " which is the app master GUI of {} owned by {}"
, remoteUser, toFetch_1, appId, runningUser);
switch (applicationReport.GetYarnApplicationState())
{
case YarnApplicationState.Killed:
case YarnApplicationState.Finished:
case YarnApplicationState.Failed:
{
ProxyUtils.SendRedirect(req, resp, toFetch_1.ToString());
return;
}
default:
{
break;
}
}
// fall out of the switch
Cookie c_1 = null;
if (userWasWarned && userApproved)
{
c_1 = MakeCheckCookie(id, true);
}
ProxyLink(req, resp, toFetch_1, c_1, GetProxyHost());
}
catch (Exception e)
{
throw new IOException(e);
}
}