Fix successful login redirection to keep parameters

Login screen accept a token to redirect to on successful login but
if the token contained parameters, they were dropped.

Encode/decode the token to fix this issue.

When a URL has a pound sign, it is included in the token as well.
This removes the hardcoded behaviour to include a pound sign in every
redirect URL. Will now be able to use login redirection for URLs with
no pound sign (e.g. GitWeb)

Change-Id: If8a74a74ce11f79389895e4d036b06a1e81abbe5

gerrit-gwtui/src/main/java/com/google/gerrit/client/Gerrit.java

@@ -336,7 +336,15 @@ public class Gerrit implements EntryPoint {
     } else if (token.startsWith("/")) {
       token = token.substring(1);
     }
-    return selfRedirect("/login/" + token);
+
+    UrlBuilder builder = new UrlBuilder();
+    builder.setProtocol(Location.getProtocol());
+    builder.setHost(Location.getHost());
+    String port = Location.getPort();
+    if (port != null && !port.isEmpty()) {
+      builder.setPort(Integer.parseInt(port));
+    }
+    return builder.buildString() + ("/login/" + URL.encodePathSegment("#/" + token));
   }
 
   public static String selfRedirect(String suffix) {

gerrit-httpd/src/main/java/com/google/gerrit/httpd/LoginUrlToken.java

@@ -14,20 +14,22 @@
 
 package com.google.gerrit.httpd;
 
+import com.google.common.base.CharMatcher;
 import com.google.common.base.Strings;
 import com.google.gerrit.common.PageLinks;
+import com.google.gerrit.extensions.restapi.Url;
 
 import javax.servlet.http.HttpServletRequest;
 
 public class LoginUrlToken {
+  private static final String DEFAULT_TOKEN = '#' + PageLinks.MINE;
 
-  public static String getToken(HttpServletRequest req) {
-    String token = req.getPathInfo();
-    if (Strings.isNullOrEmpty(token)) {
-      token = PageLinks.MINE;
-    } else if (!token.startsWith("/")) {
-      token = "/" + token;
+  public static String getToken(final HttpServletRequest req){
+    String encodedToken = req.getPathInfo();
+    if (Strings.isNullOrEmpty(encodedToken)) {
+      return DEFAULT_TOKEN;
+    } else {
+      return CharMatcher.is('/').trimLeadingFrom(Url.decode(encodedToken));
     }
-    return token;
   }
 }

gerrit-httpd/src/main/java/com/google/gerrit/httpd/auth/become/BecomeAnyAccountLoginServlet.java

@@ -21,6 +21,7 @@ import com.google.common.base.Strings;
 import com.google.gerrit.common.PageLinks;
 import com.google.gerrit.extensions.registration.DynamicItem;
 import com.google.gerrit.httpd.HtmlDomUtil;
+import com.google.gerrit.httpd.LoginUrlToken;
 import com.google.gerrit.httpd.WebSession;
 import com.google.gerrit.httpd.template.SiteHeaderFooter;
 import com.google.gerrit.reviewdb.client.Account;
@@ -132,11 +133,12 @@ class BecomeAnyAccountLoginServlet extends HttpServlet {
         }
         rdr.append("gwt.codesvr=").append(req.getParameter("gwt.codesvr"));
       }
-      rdr.append('#');
+
       if (res.isNew()) {
-        rdr.append(PageLinks.REGISTER);
+        rdr.append('#' + PageLinks.REGISTER);
+      } else {
+        rdr.append(LoginUrlToken.getToken(req));
       }
-      rdr.append(PageLinks.MINE);
       rsp.sendRedirect(rdr.toString());
 
     } else {

gerrit-httpd/src/main/java/com/google/gerrit/httpd/auth/container/HttpLoginServlet.java

@@ -80,10 +80,6 @@ class HttpLoginServlet extends HttpServlet {
   protected void doGet(final HttpServletRequest req,
       final HttpServletResponse rsp) throws ServletException, IOException {
     final String token = LoginUrlToken.getToken(req);
-    if ("/logout".equals(token) || "/signout".equals(token)) {
-      req.getRequestDispatcher("/logout").forward(req, rsp);
-      return;
-    }
 
     CacheHeaders.setNotCacheable(rsp);
     final String user = authFilter.getRemoteUser(req);
@@ -131,9 +127,8 @@ class HttpLoginServlet extends HttpServlet {
       rdr.append(authConfig.getRegisterPageUrl());
     } else {
       rdr.append(urlProvider.get(req));
-      rdr.append('#');
       if (arsp.isNew() && !token.startsWith(PageLinks.REGISTER + "/")) {
-        rdr.append(PageLinks.REGISTER);
+        rdr.append('#' + PageLinks.REGISTER);
       }
       rdr.append(token);
     }

gerrit-httpd/src/main/java/com/google/gerrit/httpd/auth/container/HttpsClientSslCertLoginServlet.java

@@ -53,7 +53,6 @@ public class HttpsClientSslCertLoginServlet extends HttpServlet {
       final HttpServletResponse rsp) throws IOException {
     final StringBuilder rdr = new StringBuilder();
     rdr.append(urlProvider.get());
-    rdr.append('#');
     rdr.append(LoginUrlToken.getToken(req));
 
     CacheHeaders.setNotCacheable(rsp);

gerrit-httpd/src/main/java/com/google/gerrit/httpd/auth/ldap/LdapLoginServlet.java

@@ -73,10 +73,7 @@ class LdapLoginServlet extends HttpServlet {
       @Nullable String errorMessage) throws IOException {
     String self = req.getRequestURI();
     String cancel = Objects.firstNonNull(urlProvider.get(req), "/");
-    String token = LoginUrlToken.getToken(req);
-    if (!token.equals("/")) {
-      cancel += "#" + token;
-    }
+    cancel += LoginUrlToken.getToken(req);
 
     Document doc = headers.parse(LdapLoginServlet.class, "LoginForm.html");
     HtmlDomUtil.find(doc, "hostName").setTextContent(req.getServerName());
@@ -144,7 +141,6 @@ class LdapLoginServlet extends HttpServlet {
 
     StringBuilder dest = new StringBuilder();
     dest.append(urlProvider.get(req));
-    dest.append('#');
     dest.append(LoginUrlToken.getToken(req));
 
     CacheHeaders.setNotCacheable(res);

gerrit-openid/src/main/java/com/google/gerrit/httpd/auth/openid/LoginForm.java

@@ -221,10 +221,7 @@ class LoginForm extends HttpServlet {
       boolean link, @Nullable String errorMessage) throws IOException {
     String self = req.getRequestURI();
     String cancel = Objects.firstNonNull(urlProvider != null ? urlProvider.get() : "/", "/");
-    String token = LoginUrlToken.getToken(req);
-    if (!token.equals("/")) {
-      cancel += "#" + token;
-    }
+    cancel += LoginUrlToken.getToken(req);
 
     Document doc = header.parse(LoginForm.class, "LoginForm.html");
     HtmlDomUtil.find(doc, "hostName").setTextContent(req.getServerName());

gerrit-openid/src/main/java/com/google/gerrit/httpd/auth/openid/OpenIdServiceImpl.java

@@ -17,6 +17,7 @@ package com.google.gerrit.httpd.auth.openid;
 import com.google.gerrit.common.PageLinks;
 import com.google.gerrit.common.auth.openid.OpenIdUrls;
 import com.google.gerrit.extensions.registration.DynamicItem;
+import com.google.gerrit.extensions.restapi.Url;
 import com.google.gerrit.httpd.CanonicalWebUrl;
 import com.google.gerrit.httpd.WebSession;
 import com.google.gerrit.reviewdb.client.Account;
@@ -483,11 +484,10 @@ class OpenIdServiceImpl {
 
     final StringBuilder rdr = new StringBuilder();
     rdr.append(urlProvider.get(req));
-    rdr.append('#');
     if (isNew && !token.startsWith(PageLinks.REGISTER + "/")) {
-      rdr.append(PageLinks.REGISTER);
+      rdr.append('#' + PageLinks.REGISTER);
     }
-    rdr.append(token);
+    rdr.append(Url.decode(token));
     rsp.sendRedirect(rdr.toString());
   }