apache: use HTTP for mod_auth_kerb service principal
[hcoop/domtool2.git] / src / plugins / apache.sml
index 11b4ab3..6a9fa39 100644 (file)
@@ -1,5 +1,6 @@
 (* HCoop Domtool (http://hcoop.sourceforge.net/)
- * Copyright (c) 2006-2007, Adam Chlipala
+ * Copyright (c) 2006-2009, Adam Chlipala
+ * Copyright (c) 2013 Clinton Ebadi
  *
  * This program is free software; you can redistribute it and/or
  * modify it under the terms of the GNU General Public License
@@ -61,22 +62,34 @@ val _ = Env.type_one "proxy_port"
        Env.int
        (fn n => n > 1024)
 
+fun validProxyTarget default s =
+    case String.fields (fn ch => ch = #":") s of
+       "http" :: host :: rest =>
+       let
+           val rest = String.concatWith ":" rest
+       in
+           if List.exists (fn h' => host = h') (map (fn h => String.concat ["//", h]) Config.Apache.proxyHosts)
+           then
+               CharVector.all (fn ch => Char.isPrint ch andalso not (Char.isSpace ch)
+                                        andalso ch <> #"\"" andalso ch <> #"'") rest
+               andalso case String.fields (fn ch => ch = #"/") rest of
+                           port :: _ =>
+                           (case Int.fromString port of
+                                NONE => default s
+                              | SOME n => n > 1024 orelse default s)
+                         | _ => default s
+           else
+               default s
+       end
+      | _ => default s
+
 val _ = Env.type_one "proxy_target"
        Env.string
-       (fn s =>
-           let
-               fun default () = List.exists (fn s' => s = s') Config.Apache.proxyTargets
-           in
-               case String.fields (fn ch => ch = #":") s of
-                   ["http", "//localhost", rest] =>
-                   (case String.fields (fn ch => ch = #"/") rest of
-                        port :: _ =>
-                        (case Int.fromString port of
-                             NONE => default ()
-                           | SOME n => n > 1024 orelse default ())
-                      | _ => default ())
-                 | _ => default ()
-           end)
+       (validProxyTarget (fn s => List.exists (fn s' => s = s') (Config.Apache.proxyTargets @ ["!"])))
+
+val _ = Env.type_one "proxy_reverse_target"
+       Env.string
+       (validProxyTarget (fn s => List.exists (fn s' => s = s') Config.Apache.proxyTargets))
 
 val _ = Env.type_one "rewrite_arg"
        Env.string
@@ -96,7 +109,8 @@ fun validLocation s =
                                                           orelse ch = #"-"
                                                           orelse ch = #"_"
                                                           orelse ch = #"."
-                                                          orelse ch = #"/") s
+                                                          orelse ch = #"/"
+                                                          orelse ch = #"~") s
 
 val _ = Env.type_one "location"
        Env.string
@@ -106,10 +120,18 @@ fun validCert s = Acl.query {user = Domain.getUser (),
                             class = "cert",
                             value = s}
 
+fun validCaCert s = Acl.query {user = Domain.getUser (),
+                              class = "cacert",
+                              value = s}
+
 val _ = Env.type_one "ssl_cert_path"
        Env.string
        validCert
 
+val _ = Env.type_one "ssl_cacert_path"
+       Env.string
+       validCaCert
+
 fun ssl e = case e of
                (EVar "no_ssl", _) => SOME NONE
              | (EApp ((EVar "use_cert", _), s), _) => Option.map SOME (Env.string s)
@@ -124,29 +146,9 @@ val _ = Env.type_one "file_extension"
        Env.string
        validExtension
 
-val defaults = [("WebPlaces",
-                (TList (TBase "web_place", dl), dl),
-                (fn () => (EList (map webPlaceDefault Config.Apache.webNodes_default), dl))),
-               ("SSL",
-                (TBase "ssl", dl),
-                (fn () => (EVar "no_ssl", dl))),
-               ("User",
-                (TBase "your_user", dl),
-                (fn () => (EString (Domain.getUser ()), dl))),
-               ("Group",
-                (TBase "your_group", dl),
-                (fn () => (EString "nogroup", dl))),
-               ("DocumentRoot",
-                (TBase "your_path", dl),
-                (fn () => (EString (Domain.homedir () ^ "/" ^ Config.Apache.public_html), dl))),
-               ("ServerAdmin",
-                (TBase "email", dl),
-                (fn () => (EString (Domain.getUser () ^ "@" ^ Config.defaultDomain), dl))),
-               ("SuExec",
-                (TBase "suexec_flag", dl),
-                (fn () => (EVar "true", dl)))]
-
-val () = app Defaults.registerDefault defaults
+val _ = Env.registerFunction ("defaultServerAdmin",
+                             fn [] => SOME (EString (Domain.getUser () ^ "@" ^ Config.defaultDomain), dl)
+                             | _ => NONE)
 
 val redirect_code = fn (EVar "temp", _) => SOME "temp"
                     | (EVar "permanent", _) => SOME "permanent"
@@ -158,6 +160,7 @@ val redirect_code = fn (EVar "temp", _) => SOME "temp"
                     | (EVar "redir304", _) => SOME "304"
                     | (EVar "redir305", _) => SOME "305"
                     | (EVar "redir307", _) => SOME "307"
+                    | (EVar "notfound", _) => SOME "404"
                     | _ => NONE
 
 val flag = fn (EVar "redirect", _) => SOME "R"
@@ -192,6 +195,7 @@ val apache_option = fn (EVar "execCGI", _) => SOME "ExecCGI"
                     | (EVar "includesNOEXEC", _) => SOME "IncludesNOEXEC"
                     | (EVar "indexes", _) => SOME "Indexes"
                     | (EVar "followSymLinks", _) => SOME "FollowSymLinks"
+                    | (EVar "multiViews", _) => SOME "MultiViews"
                     | _ => NONE
 
 val autoindex_width = fn (EVar "autofit", _) => SOME "*"
@@ -231,12 +235,27 @@ val autoindex_option = fn (EApp ((EVar "descriptionWidth", _), w), _) =>
 
                        | _ => NONE
 
+val interval_base = fn (EVar "access", _) => SOME "access"
+                    | (EVar "modification", _) => SOME "modification"
+                    | _ => NONE
+
+val interval = fn (EVar "years", _) => SOME "years"
+               | (EVar "months", _) => SOME "months"
+               | (EVar "weeks", _) => SOME "weeks"
+               | (EVar "days", _) => SOME "days"
+               | (EVar "hours", _) => SOME "hours"
+               | (EVar "minutes", _) => SOME "minutes"
+               | (EVar "seconds", _) => SOME "seconds"
+               | _ => NONE
+
 val vhostsChanged = ref false
 val logDeleted = ref false
+val delayedLogMoves = ref (fn () => ())
 
 val () = Slave.registerPreHandler
             (fn () => (vhostsChanged := false;
-                       logDeleted := false))
+                       logDeleted := false;
+                       delayedLogMoves := (fn () => print "Executing delayed log moves/deletes.\n")))
 
 fun findVhostUser fname =
     let
@@ -329,18 +348,20 @@ val () = Slave.registerFileHandler (fn fs =>
                                                               Slave.Delete _ =>
                                                               let
                                                                   val ldir = realLogDir oldUser
+                                                                  val dlm = !delayedLogMoves
                                                               in
                                                                   if !logDeleted then
                                                                       ()
                                                                   else
-                                                                      (ignore (OS.Process.system (down ()));
+                                                                      ((*ignore (OS.Process.system (down ()));*)
                                                                        ignore (OS.Process.system (fixperms ()));
                                                                        logDeleted := true);
                                                                   ignore (OS.Process.system (Config.rm
                                                                                              ^ " -rf "
                                                                                              ^ realVhostFile));
-                                                                  Slave.moveDirCreate {from = ldir,
-                                                                                       to = backupLogs ()}
+                                                                  delayedLogMoves := (fn () => (dlm ();
+                                                                                                Slave.moveDirCreate {from = ldir,
+                                                                                                                     to = backupLogs ()}))
                                                               end
                                                             | Slave.Add =>
                                                               let
@@ -368,15 +389,18 @@ val () = Slave.registerFileHandler (fn fs =>
                                                                    let
                                                                        val old = realLogDir oldUser
                                                                        val rld = realLogDir user
+
+                                                                       val dlm = !delayedLogMoves
                                                                    in
                                                                        if !logDeleted then
                                                                            ()
                                                                        else
-                                                                           (ignore (OS.Process.system (down ()));
+                                                                           ((*ignore (OS.Process.system (down ()));*)
                                                                             logDeleted := true);
-                                                                       ignore (OS.Process.system (Config.rm
-                                                                                                  ^ " -rf "
-                                                                                                  ^ realLogDir oldUser));
+                                                                       delayedLogMoves := (fn () => (dlm ();
+                                                                                                     ignore (OS.Process.system (Config.rm
+                                                                                                                                ^ " -rf "
+                                                                                                                                ^ realLogDir oldUser))));
                                                                        if Posix.FileSys.access (rld, []) then
                                                                            ()
                                                                        else
@@ -393,8 +417,9 @@ val () = Slave.registerFileHandler (fn fs =>
 val () = Slave.registerPostHandler
         (fn () =>
             (if !vhostsChanged then
-                 Slave.shellF ([if !logDeleted then undown () else reload ()],
-                               fn cl => "Error reloading Apache with " ^ cl)
+                 (Slave.shellF ([reload ()],
+                             fn cl => "Error reloading Apache with " ^ cl);
+                  if !logDeleted then !delayedLogMoves () else ())
              else
                  ()))
 
@@ -404,6 +429,8 @@ fun write s = app (fn (_, file) => TextIO.output (file, s)) (!vhostFiles)
 
 val rewriteEnabled = ref false
 val localRewriteEnabled = ref false
+val expiresEnabled = ref false
+val localExpiresEnabled = ref false
 val currentVhost = ref ""
 val currentVhostId = ref ""
 val sslEnabled = ref false
@@ -439,6 +466,9 @@ fun vhostPost () = (!post ();
                    write "</VirtualHost>\n";
                    app (TextIO.closeOut o #2) (!vhostFiles))
 
+val php_version = fn (EVar "fast_php", _) => SOME 6
+                   | _ => NONE
+
 fun vhostBody (env, makeFullHost) =
     let
        val places = Env.env (Env.list webPlace) (env, "WebPlaces")
@@ -449,6 +479,7 @@ fun vhostBody (env, makeFullHost) =
        val docroot = Env.env Env.string (env, "DocumentRoot")
        val sadmin = Env.env Env.string (env, "ServerAdmin")
        val suexec = Env.env Env.bool (env, "SuExec")
+       val php = Env.env php_version (env, "PhpVersion")
 
        val fullHost = makeFullHost (Domain.currentDomain ())
        val vhostId = fullHost ^ (if Option.isSome ssl then ".ssl" else "")
@@ -460,6 +491,8 @@ fun vhostBody (env, makeFullHost) =
 
        rewriteEnabled := false;
        localRewriteEnabled := false;
+       expiresEnabled := false;
+       localExpiresEnabled := false;
        vhostFiles := map (fn (node, ip) =>
                              let
                                  val file = Domain.domainFile {node = node,
@@ -514,7 +547,27 @@ fun vhostBody (env, makeFullHost) =
                                  TextIO.output (file, user);
                                  TextIO.output (file, "/DAVLock");
 
-                                 (ld, file)
+                                 if php = 6
+                                 then
+                                     (* fastcgi php 5.6, using version 6 since php6 doesn't exist *)
+                                     (TextIO.output (file, "\n\tAddHandler fcgid-script .php .phtml");
+                                      map (fn ext => (TextIO.output (file, "\n\tFcgidWrapper \"");
+                                                      (* kerberos wrapper, simulates waklog+mod_cgi *)
+                                                      if isWaklog node then
+                                                          (TextIO.output (file, Config.Apache.fastCgiWrapperOf user);
+                                                           TextIO.output (file, " "))
+                                                      else
+                                                          ();
+                                                      TextIO.output (file, Config.Apache.phpFastCgiWrapper);
+                                                      TextIO.output (file, "\" ");
+                                                      TextIO.output (file, ext)))
+                                          [".php", ".phtml"];
+                                      ())
+                                 else
+                                     (TextIO.output (file, "\n\tAddHandler x-httpd-php");
+                                      TextIO.output (file, Int.toString php);
+                                      TextIO.output (file, " .php .phtml"));
+                         (ld, file)
                              end)
                          places;
        write "\n\tDocumentRoot ";
@@ -551,7 +604,8 @@ val () = Env.container_one "location"
              inLocal := true),
          fn () => (write "\t</Location>\n";
                    inLocal := false;
-                   localRewriteEnabled := false))
+                   localRewriteEnabled := false;
+                   localExpiresEnabled := false))
 
 val () = Env.container_one "directory"
         ("directory", Env.string)
@@ -562,7 +616,18 @@ val () = Env.container_one "directory"
              inLocal := true),
          fn () => (write "\t</Directory>\n";
                    inLocal := false;
-                   localRewriteEnabled := false))
+                   localRewriteEnabled := false;
+                   localExpiresEnabled := false))
+
+val () = Env.container_one "filesMatch"
+        ("regexp", Env.string)
+        (fn prefix =>
+            (write "\t<FilesMatch \"";
+             write prefix;
+             write "\">\n"),
+         fn () => (write "\t</FilesMatch>\n";
+                   localRewriteEnabled := false;
+                   localExpiresEnabled := false))
 
 fun checkRewrite () =
     if !inLocal then
@@ -577,18 +642,49 @@ fun checkRewrite () =
        (write "\tRewriteEngine on\n";
         rewriteEnabled := true)
 
+fun checkExpires () =
+    if !inLocal then
+       if !localExpiresEnabled then
+           ()
+       else
+           (write "\tExpiresActive on\n";
+            localExpiresEnabled := true)
+    else if !expiresEnabled then
+       ()
+    else
+       (write "\tExpiresActive on\n";
+        expiresEnabled := true)
+
 val () = Env.action_three "localProxyRewrite"
         ("from", Env.string, "to", Env.string, "port", Env.int)
         (fn (from, to, port) =>
             (checkRewrite ();
-             write "\tRewriteRule\t";
+             write "\tRewriteRule\t\"";
              write from;
-             write "\thttp://localhost:";
+             write "\"\thttp://localhost:";
              write (Int.toString port);
              write "/";
              write to;
              write " [P]\n"))
 
+val () = Env.action_four "expiresByType"
+        ("mime", Env.string, "base", interval_base, "num", Env.int, "inter", interval)
+        (fn (mime, base, num, inter) =>
+            (checkExpires ();
+             write "\tExpiresByType\t\"";
+             write mime;
+             write "\"\t\"";
+             write base;
+             write " plus ";
+             if num < 0 then
+                 (write "-";
+                  write (Int.toString (~num)))
+             else
+                 write (Int.toString num);
+             write " ";
+             write inter;
+             write "\"\n"))
+
 val () = Env.action_two "proxyPass"
         ("from", Env.string, "to", Env.string)
         (fn (from, to) =>
@@ -596,7 +692,7 @@ val () = Env.action_two "proxyPass"
                  write from;
                  write "\t";
                  write to;
-                 write "\n"))
+                 write "\tretry=0\n"))
 
 val () = Env.action_two "proxyPassReverse"
         ("from", Env.string, "to", Env.string)
@@ -607,14 +703,22 @@ val () = Env.action_two "proxyPassReverse"
                  write to;
                  write "\n"))
 
+val () = Env.action_one "proxyPreserveHost"
+        ("enable", Env.bool)
+        (fn (enable) =>
+            (write "\tProxyPreserveHost\t";
+             if enable then write "On" else write "Off";
+             write "\n"))
+
 val () = Env.action_three "rewriteRule"
         ("from", Env.string, "to", Env.string, "flags", Env.list flag)
         (fn (from, to, flags) =>
             (checkRewrite ();
-             write "\tRewriteRule\t";
+             write "\tRewriteRule\t\"";
              write from;
-             write "\t";
+             write "\"\t\"";
              write to;
+             write "\"";
              case flags of
                  [] => ()
                | flag::rest => (write " [";
@@ -628,10 +732,11 @@ val () = Env.action_three "rewriteCond"
         ("test", Env.string, "pattern", Env.string, "flags", Env.list cond_flag)
         (fn (from, to, flags) =>
             (checkRewrite ();
-             write "\tRewriteCond\t";
+             write "\tRewriteCond\t\"";
              write from;
-             write "\t";
+             write "\"\t\"";
              write to;
+             write "\"";
              case flags of
                  [] => ()
                | flag::rest => (write " [";
@@ -645,9 +750,9 @@ val () = Env.action_one "rewriteBase"
         ("prefix", Env.string)
         (fn prefix =>
             (checkRewrite ();
-             write "\tRewriteBase\t";
+             write "\tRewriteBase\t\"";
              write prefix;
-             write "\n"))
+             write "\"\n"))
 
 val () = Env.action_one "rewriteLogLevel"
         ("level", Env.int)
@@ -677,6 +782,42 @@ val () = Env.action_two "scriptAlias"
              write to;
              write "\n"))
 
+val () = Env.action_two "fastScriptAlias"
+        ("from", Env.string, "to", Env.string)
+        (fn (from, to) =>
+            let
+                (* mod_fcgid + kerberos limit this to working with
+                individual fcgi programs. assume the target path is a
+                file and any trailing `/' is just aliasing
+                syntax. Directory+File on the script is used to
+                activate fcgid instead of Location on the alias to
+                limit effects (alias+location also match in inverse
+                order causing pernicious side-effects *)
+                val fcgi_path = if String.sub (to, size to - 1) = #"/"
+                                then
+                                    String.substring (to, 0, size to - 1)
+                                else
+                                    to
+                val fcgi_dir = OS.Path.dir fcgi_path
+                val fcgi_file = OS.Path.file fcgi_path
+            in
+                write "\tAlias\t"; write from; write " "; write to;  write "\n";
+
+                write "\t<Directory "; write fcgi_dir;  write ">\n";
+                write "\t<Files "; write fcgi_file;  write ">\n";
+                write "\tSetHandler fcgid-script\n";
+
+                (* FIXME: only set kerberos wrapper of waklog is on *)
+                (* won't be trivial, since we don't have access to node here *)
+                write "\tFcgidWrapper \"";
+                write (Config.Apache.fastCgiWrapperOf (Domain.getUser ()));
+                write " ";
+                write fcgi_path;
+                write "\"\n";
+
+                write "\t</Files>\n\t</Directory>\n"
+            end)
+
 val () = Env.action_two "errorDocument"
         ("code", Env.string, "handler", Env.string)
         (fn (code, handler) =>
@@ -788,7 +929,7 @@ val () = Env.action_one "authType"
                  write "\n";
                  case ty of
                      "kerberos" => 
-                     write "\tKrbMethodNegotiate off\n\tKrbMethodK5Passwd on\n\tKrbVerifyKDC off\n\tKrbAuthRealms HCOOP.NET\n\tKrbSaveCredentials on\n"
+                     write "\tKrbServiceName HTTP\n\tKrb5Keytab /etc/keytabs/service/apache\n\tKrbMethodNegotiate on\n\tKrbMethodK5Passwd on\n\tKrbVerifyKDC on\n\tKrbAuthRealms HCOOP.NET\n\tKrbSaveCredentials on\n"
                    | _ => ())
             else
                 print "WARNING: Skipped Kerberos authType because this isn't an SSL vhost.\n")
@@ -807,6 +948,13 @@ val () = Env.action_one "authUserFile"
              write name;
              write "\n"))
 
+val () = Env.action_one "authGroupFile"
+        ("file", Env.string)
+        (fn name =>
+            (write "\tAuthGroupFile ";
+             write name;
+             write "\n"))
+
 val () = Env.action_none "requireValidUser"
         (fn () => write "\tRequire valid-user\n")
 
@@ -913,6 +1061,17 @@ val () = Env.action_two "addDescription"
                       app (fn pat => (write " "; write pat)) pats;
                       write "\n"))
 
+val () = Env.action_two "addIcon"
+        ("icon", Env.string, "patterns", Env.list Env.string)
+        (fn (icon, pats) =>
+            case pats of
+                [] => ()
+              | _ => (write "\tAddIcon \"";
+                      write icon;
+                      write "\"";
+                      app (fn pat => (write " "; write pat)) pats;
+                      write "\n"))
+
 val () = Env.action_one "indexOptions"
         ("options", Env.list autoindex_option)
         (fn opts =>
@@ -926,6 +1085,15 @@ val () = Env.action_one "indexOptions"
                                               (write "="; write arg)) arg)) opts;
                       write "\n"))
 
+val () = Env.action_one "indexIgnore"
+        ("patterns", Env.list Env.string)
+        (fn pats =>
+            case pats of
+                [] => ()
+              | _ => (write "\tIndexIgnore";
+                      app (fn pat => (write " "; write pat)) pats;
+                      write "\n"))
+
 val () = Env.action_one "set_indexOptions"
         ("options", Env.list autoindex_option)
         (fn opts =>
@@ -976,9 +1144,59 @@ val () = Env.action_one "diskCache"
         (fn path => (write "\tCacheEnable disk \"";
                      write path;
                      write "\"\n"))
-        
+
+val () = Env.action_one "phpVersion"
+        ("version", php_version)
+        (fn version => (if version = 6
+                        then
+                            (* fastcgi php 5.6 since 6 doesn't exist *)
+                            (write "\tAddHandler fcgid-script .php .phtml\n";
+                             (* FIXME: only set kerberos wrapper of waklog is on *)
+                             (* won't be trivial, since we don't have access to node here *)
+                             write "\n\tFcgidWrapper \"";
+                             write (Config.Apache.fastCgiWrapperOf (Domain.getUser ()));
+                             write " ";
+                             write Config.Apache.phpFastCgiWrapper;
+                             write "\" .php .phtml\n")
+                        else
+                            (write "\tAddHandler x-httpd-php";
+                             write (Int.toString version);
+                             write " .php .phtml\n")))
+
+val () = Env.action_two "addType"
+        ("mime type", Env.string, "extension", Env.string)
+        (fn (mt, ext) => (write "\tAddType ";
+                          write mt;
+                          write " ";
+                          write ext;
+                          write "\n"))
+
+val filter = fn (EVar "includes", _) => SOME "INCLUDES"
+             | (EVar "deflate", _) => SOME "DEFLATE"
+             | _ => NONE
+
+val () = Env.action_two "addOutputFilter"
+        ("filters", Env.list filter, "extensions", Env.list Env.string)
+        (fn (f :: fs, exts as (_ :: _)) =>
+            (write "\tAddOutputFilter ";
+             write f;
+             app (fn f => (write ";"; write f)) fs;
+             app (fn ext => (write " "; write ext)) exts;
+             write "\n")
+          | _ => ())
+
+val () = Env.action_one "sslCertificateChainFile"
+        ("ssl_cacert_path", Env.string)
+        (fn cacert =>
+            if !sslEnabled then
+                (write "\tSSLCertificateChainFile \"";
+                 write cacert;
+                 write "\"\n")
+            else
+                print "WARNING: Skipped sslCertificateChainFile because this isn't an SSL vhost.\n")
+
 val () = Domain.registerResetLocal (fn () =>
-                                      ignore (OS.Process.system (Config.rm ^ " -rf /var/domtool/vhosts/*")))
+                                      ignore (OS.Process.system (Config.rm ^ " -rf " ^ Config.Apache.confDir ^ "/*")))
 
 val () = Domain.registerDescriber (Domain.considerAll
                                   [Domain.Extension {extension = "vhost",
@@ -986,4 +1204,32 @@ val () = Domain.registerDescriber (Domain.considerAll
                                    Domain.Extension {extension = "vhost_ssl",
                                                      heading = fn host => "SSL web vhost " ^ host ^ ":"}])
 
+val () = Env.action_one "allowEncodedSlashes"
+        ("enable", Env.bool)
+        (fn enable => (write "\tAllowEncodedSlashes ";
+                     write (if enable then "NoDecode" else "Off");
+                     write "\n"))
+val () = Env.action_none "testNoHtaccess"
+        (fn path => write "\tAllowOverride None\n")
+
+fun writeWaklogUserFile () =
+    let
+       val users = Acl.users ()
+       val outf = TextIO.openOut Config.Apache.waklogUserFile
+    in
+       app (fn user => if String.isSuffix "_admin" user then
+                           ()
+                       else
+                           (TextIO.output (outf, "<Location /~");
+                            TextIO.output (outf, user);
+                            TextIO.output (outf, ">\n\tWaklogEnabled on\n\tWaklogLocationPrincipal ");
+                            TextIO.output (outf, user);
+                            TextIO.output (outf, "/daemon@HCOOP.NET /etc/keytabs/user.daemon/");
+                            TextIO.output (outf, user);
+                            TextIO.output (outf, "\n</Location>\n\n"))) users;
+       TextIO.closeOut outf
+    end
+
+val () = Domain.registerOnUsersChange writeWaklogUserFile
+
 end