Working on automatic rmdom for bad domains during regen
[hcoop/domtool2.git] / src / plugins / apache.sml
index 27641ab..765d696 100644 (file)
@@ -1,5 +1,5 @@
 (* HCoop Domtool (http://hcoop.sourceforge.net/)
- * Copyright (c) 2006, Adam Chlipala
+ * Copyright (c) 2006-2007, Adam Chlipala
  *
  * This program is free software; you can redistribute it and/or
  * modify it under the terms of the GNU General Public License
@@ -22,59 +22,325 @@ structure Apache :> APACHE = struct
 
 open Ast
 
+val _ = Env.type_one "web_node"
+       Env.string
+       (fn node =>
+           List.exists (fn (x, _) => x = node) Config.Apache.webNodes_all
+           orelse (Domain.hasPriv "www"
+                   andalso List.exists (fn (x, _) => x = node) Config.Apache.webNodes_admin))
+
+val _ = Env.registerFunction ("web_node_to_node",
+                             fn [e] => SOME e
+                              | _ => NONE)
+
+val _ = Env.type_one "proxy_port"
+       Env.int
+       (fn n => n > 1024)
+
+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)
+
+val _ = Env.type_one "rewrite_arg"
+       Env.string
+       (CharVector.all Char.isAlphaNum)
+
+val _ = Env.type_one "suexec_flag"
+       Env.bool
+       (fn b => b orelse Domain.hasPriv "www")
+
+fun validLocation s =
+    size s > 0 andalso size s < 1000 andalso CharVector.all
+                                                (fn ch => Char.isAlphaNum ch
+                                                          orelse ch = #"-"
+                                                          orelse ch = #"_"
+                                                          orelse ch = #"."
+                                                          orelse ch = #"/") s
+
+val _ = Env.type_one "location"
+       Env.string
+       validLocation
+
+fun validCert s = Acl.query {user = Domain.getUser (),
+                            class = "cert",
+                            value = s}
+
+val _ = Env.type_one "ssl_cert_path"
+       Env.string
+       validCert
+
+fun ssl e = case e of
+               (EVar "no_ssl", _) => SOME NONE
+             | (EApp ((EVar "use_cert", _), s), _) => Option.map SOME (Env.string s)
+             | _ => NONE
+
 val dl = ErrorMsg.dummyLoc
 
-val _ = Main.registerDefault ("WebNodes",
-                             (TList (TBase "node", dl), dl),
-                             (fn () => (EList (map (fn s => (EString s, dl)) Config.Apache.webNodes), dl)))
+val defaults = [("WebNodes",
+                (TList (TBase "web_node", dl), dl),
+                (fn () => (EList (map (fn s => (EString s, dl)) 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 _ = Main.registerDefault ("SSL",
-                             (TBase "bool", dl),
-                             (fn () => (EVar "false", dl)))
+val redirect_code = fn (EVar "temp", _) => SOME "temp"
+                    | (EVar "permanent", _) => SOME "permanent"
+                    | (EVar "seeother", _) => SOME "seeother"
+                    | (EVar "redir300", _) => SOME "300"
+                    | (EVar "redir301", _) => SOME "301"
+                    | (EVar "redir302", _) => SOME "302"
+                    | (EVar "redir303", _) => SOME "303"
+                    | (EVar "redir304", _) => SOME "304"
+                    | (EVar "redir305", _) => SOME "305"
+                    | (EVar "redir307", _) => SOME "307"
+                    | _ => NONE
 
-val _ = Main.registerDefault ("User",
-                             (TBase "your_user", dl),
-                             (fn () => (EString (Domain.getUser ()), dl)))
+val flag = fn (EVar "redirect", _) => SOME "R"
+           | (EVar "forbidden", _) => SOME "F"
+           | (EVar "gone", _) => SOME "G"
+           | (EVar "last", _) => SOME "L"
+           | (EVar "chain", _) => SOME "C"
+           | (EVar "nosubreq", _) => SOME "NS"
+           | (EVar "nocase", _) => SOME "NC"
+           | (EVar "qsappend", _) => SOME "QSA"
+           | (EVar "noescape", _) => SOME "NE"
+           | (EVar "passthrough", _) => SOME "PT"
+           | (EApp ((EVar "mimeType", _), e), _) =>
+             Option.map (fn s => "T=" ^ s) (Env.string e)
+           | (EApp ((EVar "redirectWith", _), e), _) =>
+             Option.map (fn s => "R=" ^ s) (redirect_code e)
+           | (EApp ((EVar "skip", _), e), _) =>
+             Option.map (fn n => "S=" ^ Int.toString n) (Env.int e)
+           | (EApp ((EApp ((EVar "env", _), e1), _), e2), _) =>
+             (case Env.string e1 of
+                  NONE => NONE
+                | SOME s1 => Option.map (fn s2 => "E=" ^ s1 ^ ":" ^ s2)
+                                        (Env.string e2))
 
-val _ = Main.registerDefault ("Group",
-                             (TBase "your_group", dl),
-                             (fn () => (EString (Domain.getUser ()), dl)))
+           | _ => NONE
 
-val _ = Main.registerDefault ("DocumentRoot",
-                             (TBase "your_path", dl),
-                             (fn () => (EString ("/home/" ^ Domain.getUser () ^ "/public_html"), dl)))
+val cond_flag = fn (EVar "cond_nocase", _) => SOME "NC"
+           | (EVar "ornext", _) => SOME "OR"
+           | _ => NONE
 
-val _ = Main.registerDefault ("ServerAdmin",
-                             (TBase "email", dl),
-                             (fn () => (EString (Domain.getUser () ^ "@" ^ Config.defaultDomain), dl)))
+val apache_option = fn (EVar "execCGI", _) => SOME "ExecCGI"
+                    | (EVar "includesNOEXEC", _) => SOME "IncludesNOEXEC"
+                    | (EVar "indexes", _) => SOME "Indexes"
+                    | _ => NONE
+
+val autoindex_width = fn (EVar "autofit", _) => SOME "*"
+                      | (EApp ((EVar "characters", _), n), _) =>
+                        Option.map Int.toString (Env.int n)
+                      | _ => NONE
+
+val autoindex_option = fn (EApp ((EVar "descriptionWidth", _), w), _) =>
+                         Option.map (fn w => ("DescriptionWidth", SOME w))
+                         (autoindex_width w)
+                       | (EVar "fancyIndexing", _) => SOME ("FancyIndexing", NONE)
+                       | (EVar "foldersFirst", _) => SOME ("FoldersFirst", NONE)
+                       | (EVar "htmlTable", _) => SOME ("HTMLTable", NONE)
+                       | (EVar "iconsAreLinks", _) => SOME ("IconsAreLinks", NONE)
+                       | (EApp ((EVar "iconHeight", _), n), _) =>
+                         Option.map (fn w => ("IconHeight", SOME (Int.toString w)))
+                                    (Env.int n)
+                       | (EApp ((EVar "iconWidth", _), n), _) =>
+                         Option.map (fn w => ("IconWidth", SOME (Int.toString w)))
+                                    (Env.int n)
+                       | (EVar "ignoreCase", _) => SOME ("IgnoreCase", NONE)
+                       | (EVar "ignoreClient", _) => SOME ("IgnoreClient", NONE)
+                       | (EApp ((EVar "nameWidth", _), w), _) =>
+                         Option.map (fn w => ("NameWidth", SOME w))
+                                    (autoindex_width w)
+                       | (EVar "scanHtmlTitles", _) => SOME ("ScanHTMLTitles", NONE)
+                       | (EVar "suppressColumnSorting", _) => SOME ("SuppressColumnSorting", NONE)
+                       | (EVar "suppressDescription", _) => SOME ("SuppressDescription", NONE)
+                       | (EVar "suppressHtmlPreamble", _) => SOME ("SuppressHTMLPreamble", NONE)
+                       | (EVar "suppressIcon", _) => SOME ("SuppressIcon", NONE)
+                       | (EVar "suppressLastModified", _) => SOME ("SuppressLastModified", NONE)
+                       | (EVar "suppressRules", _) => SOME ("SuppressRules", NONE)
+                       | (EVar "suppressSize", _) => SOME ("SuppressSize", NONE)
+                       | (EVar "trackModified", _) => SOME ("TrackModified", NONE)
+                       | (EVar "versionSort", _) => SOME ("VersionSort", NONE)
+                       | (EVar "xhtml", _) => SOME ("XHTML", NONE)
+
+                       | _ => NONE
 
 val vhostsChanged = ref false
+val logDeleted = ref false
 
 val () = Slave.registerPreHandler
-            (fn () => vhostsChanged := false)
+            (fn () => (vhostsChanged := false;
+                       logDeleted := false))
+
+fun findVhostUser fname =
+    let
+       val inf = TextIO.openIn fname
+
+       fun loop () =
+           case TextIO.inputLine inf of
+               NONE => NONE
+             | SOME line =>
+               if String.isPrefix "# Owner: " line then
+                   case String.tokens Char.isSpace line of
+                       [_, _, user] => SOME user
+                     | _ => NONE
+               else
+                   loop ()
+    in
+       loop ()
+       before TextIO.closeIn inf
+    end handle _ => NONE
+
+val webNodes_full = Config.Apache.webNodes_all @ Config.Apache.webNodes_admin
+
+fun isVersion1 node =
+    List.exists (fn (n, {version = ConfigTypes.APACHE_1_3, ...}) => n = node
+                 | _ => false) webNodes_full
+
+fun imVersion1 () = isVersion1 (Slave.hostname ())
+
+fun isWaklog node =
+    List.exists (fn (n, {auth = ConfigTypes.MOD_WAKLOG, ...}) => n = node
+                 | _ => false) webNodes_full
+
+fun down () = if imVersion1 () then Config.Apache.down1 else Config.Apache.down
+fun undown () = if imVersion1 () then Config.Apache.undown1 else Config.Apache.undown
+fun reload () = if imVersion1 () then Config.Apache.reload1 else Config.Apache.reload
+fun fixperms () = if imVersion1 () then Config.Apache.fixperms1 else Config.Apache.fixperms
+
+fun logDir {user, node, vhostId} =
+    String.concat [Config.Apache.logDirOf (isVersion1 node) user,
+                  "/",
+                  node,
+                  "/",
+                  vhostId]
 
 val () = Slave.registerFileHandler (fn fs =>
                                       let
                                           val spl = OS.Path.splitDirFile (#file fs)
                                       in
                                           if String.isSuffix ".vhost" (#file spl)
-                                             orelse String.isSuffix ".vhost_ssl" (#file spl) then
-                                              (vhostsChanged := true;
-                                               case #action fs of
-                                                   Slave.Delete =>
-                                                   ignore (OS.Process.system (Config.rm
-                                                                              ^ " -rf "
-                                                                              ^ Config.Apache.confDir
-                                                                              ^ "/"
-                                                                              ^ #file spl))
-                                                 | _ =>
-                                                   ignore (OS.Process.system (Config.cp
-                                                                              ^ " "
-                                                                              ^ #file fs
-                                                                              ^ " "
-                                                                              ^ Config.Apache.confDir
-                                                                              ^ "/"
-                                                                              ^ #file spl)))
+                                             orelse String.isSuffix ".vhost_ssl" (#file spl) then let
+                                                  val realVhostFile = OS.Path.joinDirFile
+                                                                          {dir = Config.Apache.confDir,
+                                                                           file = #file spl}
+
+                                                  val user = findVhostUser (#file fs)
+                                                  val oldUser = findVhostUser realVhostFile
+                                              in
+                                                  if (oldUser = NONE andalso #action fs <> Slave.Add)
+                                                     orelse (user = NONE andalso not (Slave.isDelete (#action fs))) then
+                                                      print ("Can't find user in " ^ #file fs ^ " or " ^ realVhostFile ^ "!  Taking no action.\n")
+                                                  else
+                                                      let
+                                                          val vhostId = if OS.Path.ext (#file spl) = SOME "vhost_ssl" then
+                                                                            OS.Path.base (#file spl) ^ ".ssl"
+                                                                        else
+                                                                            OS.Path.base (#file spl)
+
+                                                          fun realLogDir user =
+                                                              logDir {user = valOf user,
+                                                                      node = Slave.hostname (),
+                                                                      vhostId = vhostId}
+
+                                                          fun backupLogs () =
+                                                              OS.Path.joinDirFile
+                                                                  {dir = Config.Apache.backupLogDirOf
+                                                                             (isVersion1 (Slave.hostname ())),
+                                                                   file = vhostId}
+                                                      in
+                                                          vhostsChanged := true;
+                                                          case #action fs of
+                                                              Slave.Delete _ =>
+                                                              let
+                                                                  val ldir = realLogDir oldUser
+                                                              in
+                                                                  if !logDeleted then
+                                                                      ()
+                                                                  else
+                                                                      (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 ()}
+                                                              end
+                                                            | Slave.Add =>
+                                                              let
+                                                                  val rld = realLogDir user
+                                                              in
+                                                                  ignore (OS.Process.system (Config.cp
+                                                                                             ^ " "
+                                                                                             ^ #file fs
+                                                                                             ^ " "
+                                                                                             ^ realVhostFile));
+                                                                  if Posix.FileSys.access (rld, []) then
+                                                                      ()
+                                                                  else
+                                                                      Slave.moveDirCreate {from = backupLogs (),
+                                                                                           to = rld}
+                                                              end
+                                                              
+                                                            | _ =>
+                                                              (ignore (OS.Process.system (Config.cp
+                                                                                          ^ " "
+                                                                                          ^ #file fs
+                                                                                          ^ " "
+                                                                                          ^ realVhostFile));
+                                                               if user <> oldUser then
+                                                                   let
+                                                                       val old = realLogDir oldUser
+                                                                       val rld = realLogDir user
+                                                                   in
+                                                                       if !logDeleted then
+                                                                           ()
+                                                                       else
+                                                                           (ignore (OS.Process.system (down ()));
+                                                                            logDeleted := true);
+                                                                       ignore (OS.Process.system (Config.rm
+                                                                                                  ^ " -rf "
+                                                                                                  ^ realLogDir oldUser));
+                                                                       if Posix.FileSys.access (rld, []) then
+                                                                           ()
+                                                                       else
+                                                                           Slave.mkDirAll rld
+                                                                   end
+                                                               else
+                                                                   ())
+                                                      end
+                                              end
                                           else
                                               ()
                                       end)
@@ -82,13 +348,44 @@ val () = Slave.registerFileHandler (fn fs =>
 val () = Slave.registerPostHandler
         (fn () =>
             (if !vhostsChanged then
-                 Slave.shellF ([Config.Apache.reload],
+                 Slave.shellF ([if !logDeleted then undown () else reload ()],
                                fn cl => "Error reloading Apache with " ^ cl)
              else
                  ()))
 
-val vhostFiles : TextIO.outstream list ref = ref []
-fun write s = app (fn file => TextIO.output (file, s)) (!vhostFiles)
+val vhostFiles : (string * TextIO.outstream) list ref = ref []
+fun write' s = app (fn (node, file) => TextIO.output (file, s node)) (!vhostFiles)
+fun write s = app (fn (_, file) => TextIO.output (file, s)) (!vhostFiles)
+
+val rewriteEnabled = ref false
+val localRewriteEnabled = ref false
+val currentVhost = ref ""
+val currentVhostId = ref ""
+val sslEnabled = ref false
+
+val pre = ref (fn _ : {user : string, nodes : string list, id : string, hostname : string} => ())
+fun registerPre f =
+    let
+       val old = !pre
+    in
+       pre := (fn x => (old x; f x))
+    end
+
+val post = ref (fn () => ())
+fun registerPost f =
+    let
+       val old = !post
+    in
+       post := (fn () => (old (); f ()))
+    end
+
+val aliaser = ref (fn _ : string => ())
+fun registerAliaser f =
+    let
+       val old = !aliaser
+    in
+       aliaser := (fn x => (old x; f x))
+    end
 
 val () = Env.containerV_one "vhost"
         ("host", Env.string)
@@ -96,42 +393,519 @@ val () = Env.containerV_one "vhost"
             let
                 val nodes = Env.env (Env.list Env.string) (env, "WebNodes")
 
-                val ssl = Env.env Env.bool (env, "SSL")
+                val ssl = Env.env ssl (env, "SSL")
                 val user = Env.env Env.string (env, "User")
                 val group = Env.env Env.string (env, "Group")
                 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 fullHost = host ^ "." ^ Domain.currentDomain ()
-                val confFile = fullHost ^ (if ssl then ".vhost_ssl" else ".vhost")
+                val vhostId = fullHost ^ (if Option.isSome ssl then ".ssl" else "")
+                val confFile = fullHost ^ (if Option.isSome ssl then ".vhost_ssl" else ".vhost")
             in
+                currentVhost := fullHost;
+                currentVhostId := vhostId;
+                sslEnabled := Option.isSome ssl;
+
+                rewriteEnabled := false;
+                localRewriteEnabled := false;
                 vhostFiles := map (fn node =>
                                       let
                                           val file = Domain.domainFile {node = node,
                                                                         name = confFile}
+
+                                          val ld = logDir {user = user, node = node, vhostId = vhostId}
                                       in
-                                          TextIO.output (file, "<VirtualHost ");
+                                          TextIO.output (file, "# Owner: ");
+                                          TextIO.output (file, user);
+                                          TextIO.output (file, "\n<VirtualHost ");
                                           TextIO.output (file, Domain.nodeIp node);
                                           TextIO.output (file, ":");
-                                          TextIO.output (file, if ssl then
-                                                                   "443"
-                                                               else
-                                                                   "80");
+                                          TextIO.output (file, case ssl of
+                                                                   SOME _ => "443"
+                                                                 | NONE => "80");
                                           TextIO.output (file, ">\n");
-                                          file
+                                          TextIO.output (file, "\tErrorLog ");
+                                          TextIO.output (file, ld);
+                                          TextIO.output (file, "/error.log\n\tCustomLog ");
+                                          TextIO.output (file, ld);
+                                          TextIO.output (file, "/access.log combined\n");
+                                          TextIO.output (file, "\tServerName ");
+                                          TextIO.output (file, fullHost);
+                                          app
+                                              (fn dom => (TextIO.output (file, "\n\tServerAlias ");
+                                                          TextIO.output (file, host);
+                                                          TextIO.output (file, ".");
+                                                          TextIO.output (file, dom)))
+                                              (Domain.currentAliasDomains ());
+
+                                          if suexec then
+                                              if isVersion1 node then
+                                                  (TextIO.output (file, "\n\tUser ");
+                                                   TextIO.output (file, user);
+                                                   TextIO.output (file, "\n\tGroup ");
+                                                   TextIO.output (file, group))
+                                              else
+                                                  (TextIO.output (file, "\n\tSuexecUserGroup ");
+                                                   TextIO.output (file, user);
+                                                   TextIO.output (file, " ");
+                                                   TextIO.output (file, group))
+                                          else
+                                              ();
+
+                                          if isWaklog node then
+                                              (TextIO.output (file, "\n\tWaklogEnabled on\n\tWaklogLocationPrincipal ");
+                                               TextIO.output (file, user);
+                                               TextIO.output (file, "/daemon@HCOOP.NET /etc/keytabs/user.daemon/");
+                                               TextIO.output (file, user))
+                                          else
+                                              ();
+
+                                          TextIO.output (file, "\n\tDAVLockDB /var/lock/apache2/dav/");
+                                          TextIO.output (file, user);
+                                          TextIO.output (file, "/DAVLock");
+
+                                          (ld, file)
                                       end)
                                   nodes;
-                write "\tSuexecUserGroup ";
-                write user;
-                write " ";
-                write group;
                 write "\n\tDocumentRoot ";
                 write docroot;
                 write "\n\tServerAdmin ";
                 write sadmin;
-                write "\n"
+                case ssl of
+                    SOME cert =>
+                    (write "\n\tSSLEngine on\n\tSSLCertificateFile ";
+                     write cert)
+                  | NONE => ();
+                write "\n";
+                !pre {user = user, nodes = nodes, id = vhostId, hostname = fullHost};
+                app (fn dom => !aliaser (host ^ "." ^ dom)) (Domain.currentAliasDomains ())
             end,
-         fn () => (write "</VirtualHost>\n";
-                   app TextIO.closeOut (!vhostFiles)))
+         fn () => (!post ();
+                   write "</VirtualHost>\n";
+                   app (TextIO.closeOut o #2) (!vhostFiles)))
+
+val inLocal = ref false
+
+val () = Env.container_one "location"
+        ("prefix", Env.string)
+        (fn prefix =>
+            (write "\t<Location ";
+             write prefix;
+             write ">\n";
+             inLocal := true),
+         fn () => (write "\t</Location>\n";
+                   inLocal := false;
+                   localRewriteEnabled := false))
+
+val () = Env.container_one "directory"
+        ("directory", Env.string)
+        (fn directory =>
+            (write "\t<Directory ";
+             write directory;
+             write ">\n";
+             inLocal := true),
+         fn () => (write "\t</Directory>\n";
+                   inLocal := false;
+                   localRewriteEnabled := false))
+
+fun checkRewrite () =
+    if !inLocal then
+       if !rewriteEnabled orelse !localRewriteEnabled then
+           ()
+       else
+           (write "\tRewriteEngine on\n";
+            localRewriteEnabled := true)
+    else if !rewriteEnabled then
+       ()
+    else
+       (write "\tRewriteEngine on\n";
+        rewriteEnabled := true)
+
+val () = Env.action_three "localProxyRewrite"
+        ("from", Env.string, "to", Env.string, "port", Env.int)
+        (fn (from, to, port) =>
+            (checkRewrite ();
+             write "\tRewriteRule\t";
+             write from;
+             write "\thttp://localhost:";
+             write (Int.toString port);
+             write "/";
+             write to;
+             write " [P]\n"))
+
+val () = Env.action_two "proxyPass"
+        ("from", Env.string, "to", Env.string)
+        (fn (from, to) =>
+                (write "\tProxyPass\t";
+                 write from;
+                 write "\t";
+                 write to;
+                 write "\n"))
+
+val () = Env.action_two "proxyPassReverse"
+        ("from", Env.string, "to", Env.string)
+        (fn (from, to) =>
+                (write "\tProxyPassReverse\t";
+                 write from;
+                 write "\t";
+                 write to;
+                 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 from;
+             write "\t";
+             write to;
+             case flags of
+                 [] => ()
+               | flag::rest => (write " [";
+                                write flag;
+                                app (fn flag => (write ",";
+                                                 write flag)) rest;
+                                write "]");
+             write "\n"))
+
+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 from;
+             write "\t";
+             write to;
+             case flags of
+                 [] => ()
+               | flag::rest => (write " [";
+                                write flag;
+                                app (fn flag => (write ",";
+                                                 write flag)) rest;
+                                write "]");
+             write "\n"))
+
+val () = Env.action_one "rewriteBase"
+        ("prefix", Env.string)
+        (fn prefix =>
+            (checkRewrite ();
+             write "\tRewriteBase\t";
+             write prefix;
+             write "\n"))
+
+val () = Env.action_one "rewriteLogLevel"
+        ("level", Env.int)
+        (fn level =>
+            (checkRewrite ();
+             write "\tRewriteLog ";
+             write' (fn x => x);
+             write "/rewrite.log\n\tRewriteLogLevel ";
+             write (Int.toString level);
+             write "\n"))
+
+val () = Env.action_two "alias"
+        ("from", Env.string, "to", Env.string)
+        (fn (from, to) =>
+            (write "\tAlias\t";
+             write from;
+             write " ";
+             write to;
+             write "\n"))
+
+val () = Env.action_two "scriptAlias"
+        ("from", Env.string, "to", Env.string)
+        (fn (from, to) =>
+            (write "\tScriptAlias\t";
+             write from;
+             write " ";
+             write to;
+             write "\n"))
+
+val () = Env.action_two "errorDocument"
+        ("code", Env.string, "handler", Env.string)
+        (fn (code, handler) =>
+            (write "\tErrorDocument\t";
+             write code;
+             write " ";
+             write handler;
+             write "\n"))
+
+val () = Env.action_one "options"
+        ("options", Env.list apache_option)
+        (fn opts =>
+            case opts of
+                [] => ()
+              | _ => (write "\tOptions";
+                      app (fn opt => (write " "; write opt)) opts;
+                      write "\n"))
+
+val () = Env.action_one "set_options"
+        ("options", Env.list apache_option)
+        (fn opts =>
+            case opts of
+                [] => ()
+              | _ => (write "\tOptions";
+                      app (fn opt => (write " +"; write opt)) opts;
+                      write "\n"))
+
+val () = Env.action_one "unset_options"
+        ("options", Env.list apache_option)
+        (fn opts =>
+            case opts of
+                [] => ()
+              | _ => (write "\tOptions";
+                      app (fn opt => (write " -"; write opt)) opts;
+                      write "\n"))
+
+val () = Env.action_one "directoryIndex"
+        ("filenames", Env.list Env.string)
+        (fn opts =>
+            (write "\tDirectoryIndex";
+             app (fn opt => (write " "; write opt)) opts;
+             write "\n"))
+
+val () = Env.action_one "serverAliasHost"
+        ("host", Env.string)
+        (fn host =>
+            (write "\tServerAlias ";
+             write host;
+             write "\n";
+             !aliaser host))
+
+val () = Env.action_one "serverAlias"
+        ("host", Env.string)
+        (fn host =>
+            (app
+                 (fn dom =>
+                     let
+                         val full = host ^ "." ^ dom
+                     in
+                         write "\tServerAlias ";
+                         write full;
+                         write "\n";
+                         !aliaser full
+                     end)
+                 (Domain.currentDomains ())))
+
+val () = Env.action_none "serverAliasDefault"
+        (fn () =>
+            (app
+                 (fn dom =>
+                         (write "\tServerAlias ";
+                          write dom;
+                          write "\n";
+                          !aliaser dom))
+                 (Domain.currentDomains ())))
+
+val authType = fn (EVar "basic", _) => SOME "basic"
+               | (EVar "digest", _) => SOME "digest"
+               | (EVar "kerberos", _) => SOME "kerberos"
+               | _ => NONE
+
+fun allowAuthType "kerberos" = !sslEnabled
+  | allowAuthType _ = true
+
+val () = Env.action_one "authType"
+        ("type", authType)
+        (fn ty =>
+            if allowAuthType ty then
+                (write "\tAuthType ";
+                 write ty;
+                 write "\n";
+                 case ty of
+                     "kerberos" => 
+                     write "\tKrbMethodNegotiate off\n\tKrbMethodK5Passwd on\n\tKrbVerifyKDC off\n\tKrbAuthRealms HCOOP.NET\n\tKrbSaveCredentials on\n"
+                   | _ => ())
+            else
+                print "WARNING: Skipped Kerberos authType because this isn't an SSL vhost.\n")
+
+val () = Env.action_one "authName"
+        ("name", Env.string)
+        (fn name =>
+            (write "\tAuthName \"";
+             write name;
+             write "\"\n"))
+
+val () = Env.action_one "authUserFile"
+        ("file", Env.string)
+        (fn name =>
+            (write "\tAuthUserFile ";
+             write name;
+             write "\n"))
+
+val () = Env.action_none "requireValidUser"
+        (fn () => write "\tRequire valid-user\n")
+
+val () = Env.action_one "requireUser"
+        ("users", Env.list Env.string)
+        (fn names =>
+            case names of
+                [] => ()
+              | _ => (write "\tRequire user";
+                      app (fn name => (write " "; write name)) names;
+                      write "\n"))
+
+val () = Env.action_one "requireGroup"
+        ("groups", Env.list Env.string)
+        (fn names =>
+            case names of
+                [] => ()
+              | _ => (write "\tRequire group";
+                      app (fn name => (write " "; write name)) names;
+                      write "\n"))
+
+val () = Env.action_none "orderAllowDeny"
+        (fn () => write "\tOrder allow,deny\n")
+
+val () = Env.action_none "orderDenyAllow"
+        (fn () => write "\tOrder deny,allow\n")
+
+val () = Env.action_none "allowFromAll"
+        (fn () => write "\tAllow from all\n")
+
+val () = Env.action_one "allowFrom"
+        ("entries", Env.list Env.string)
+        (fn names =>
+            case names of
+                [] => ()
+              | _ => (write "\tAllow from";
+                      app (fn name => (write " "; write name)) names;
+                      write "\n"))
+
+val () = Env.action_none "denyFromAll"
+        (fn () => write "\tDeny from all\n")
+
+val () = Env.action_one "denyFrom"
+        ("entries", Env.list Env.string)
+        (fn names =>
+            case names of
+                [] => ()
+              | _ => (write "\tDeny from";
+                      app (fn name => (write " "; write name)) names;
+                      write "\n"))
+
+val () = Env.action_none "satisfyAll"
+        (fn () => write "\tSatisfy all\n")
+
+val () = Env.action_none "satisfyAny"
+        (fn () => write "\tSatisfy any\n")
+
+val () = Env.action_one "forceType"
+        ("type", Env.string)
+        (fn ty => (write "\tForceType ";
+                   write ty;
+                   write "\n"))
+
+val () = Env.action_none "forceTypeOff"
+        (fn () => write "\tForceType None\n")
+
+val () = Env.action_two "action"
+        ("what", Env.string, "how", Env.string)
+        (fn (what, how) => (write "\tAction ";
+                            write what;
+                            write " ";
+                            write how;
+                            write "\n"))
+
+val () = Env.action_one "addDefaultCharset"
+        ("charset", Env.string)
+        (fn ty => (write "\tAddDefaultCharset ";
+                   write ty;
+                   write "\n"))
+
+(*val () = Env.action_one "davSvn"
+        ("path", Env.string)
+        (fn path => (write "\tDAV svn\n\tSVNPath ";
+                     write path;
+                     write "\n"))
+
+val () = Env.action_one "authzSvnAccessFile"
+        ("path", Env.string)
+        (fn path => (write "\tAuthzSVNAccessFile ";
+                     write path;
+                     write "\n"))*)
+
+val () = Env.action_none "davFilesystem"
+        (fn path => write "\tDAV filesystem\n")
+
+val () = Env.action_two "addDescription"
+        ("description", Env.string, "patterns", Env.list Env.string)
+        (fn (desc, pats) =>
+            case pats of
+                [] => ()
+              | _ => (write "\tAddDescription \"";
+                      write (String.toString desc);
+                      write "\"";
+                      app (fn pat => (write " "; write pat)) pats;
+                      write "\n"))
+
+val () = Env.action_one "indexOptions"
+        ("options", Env.list autoindex_option)
+        (fn opts =>
+            case opts of
+                [] => ()
+              | _ => (write "\tIndexOptions";
+                      app (fn (opt, arg) =>
+                              (write " ";
+                               write opt;
+                               Option.app (fn arg =>
+                                              (write "="; write arg)) arg)) opts;
+                      write "\n"))
+
+val () = Env.action_one "set_indexOptions"
+        ("options", Env.list autoindex_option)
+        (fn opts =>
+            case opts of
+                [] => ()
+              | _ => (write "\tIndexOptions";
+                      app (fn (opt, arg) =>
+                              (write " +";
+                               write opt;
+                               Option.app (fn arg =>
+                                              (write "="; write arg)) arg)) opts;
+                      write "\n"))
+
+val () = Env.action_one "unset_indexOptions"
+        ("options", Env.list autoindex_option)
+        (fn opts =>
+            case opts of
+                [] => ()
+              | _ => (write "\tIndexOptions";
+                      app (fn (opt, _) =>
+                              (write " -";
+                               write opt)) opts;
+                      write "\n"))
+
+val () = Env.action_one "headerName"
+        ("name", Env.string)
+        (fn name => (write "\tHeaderName ";
+                     write name;
+                     write "\n"))
+
+val () = Env.action_one "readmeName"
+        ("name", Env.string)
+        (fn name => (write "\tReadmeName ";
+                     write name;
+                     write "\n"))
+
+val () = Env.action_two "setEnv"
+        ("key", Env.string, "value", Env.string)
+        (fn (key, value) => (write "\tSetEnv \"";
+                             write key;
+                             write "\" \"";
+                             write (String.translate (fn #"\"" => "\\\""
+                                                       | ch => str ch) value);
+                             write "\"\n"))
+
+val () = Domain.registerResetLocal (fn () =>
+                                      ignore (OS.Process.system (Config.rm ^ " -rf /var/domtool/vhosts/*")))
+
+val () = Domain.registerDescriber (Domain.considerAll
+                                  [Domain.Extension {extension = "vhost",
+                                                     heading = fn host => "Web vhost " ^ host},
+                                   Domain.Extension {extension = "vhost_ssl",
+                                                     heading = fn host => "SSL web vhost " ^ host}])
 
 end