diff --git a/mkRewriteRules b/mkRewriteRules
index 7cdf9f7..9205455 100755
--- a/mkRewriteRules
+++ b/mkRewriteRules
@@ -82,6 +82,19 @@ Dans les exemples donnés ci-dessus, $URL est l'\''url générée par la réécr
 et $proxy_acls la valeur du champ proxy_acls spécifiée ci-dessus.'
 }
 
+function joinurl() {
+    # joindre chaque élément de $1..@ par /, en évitant les slashes en double
+    local i url
+    for i in "$@"; do
+        if [ -n "$url" ]; then
+            url="${url%/}/${i#/}"
+        else
+            url="$i"
+        fi
+    done
+    [ -n "$url" ] && echo "$url"
+}
+
 proxy_enabled=
 infile=
 outfile="RewriteRules.conf"
@@ -136,7 +149,7 @@ for rule in "${rules[@]}"; do
         echo "${rule#=}" >>"$outfile"
         continue
     fi
-    
+
     IFS=:; set -- $rule; unset IFS
     index=1
     done=
@@ -158,6 +171,10 @@ for rule in "${rules[@]}"; do
         index=$(($index + 1))
     done
 
+    # mettre en forme prefix s'il est défini
+    [ -n "$prefix" ] && prefix="$prefix
+"
+
     if [ "$thishost" == "$host" ]; then
         host=
     fi
@@ -188,34 +205,28 @@ for rule in "${rules[@]}"; do
         if [ -n "$host" ]; then
             # sur un autre hôte
             if [ -n "$noslash" ]; then
-                echo "${prefix:+$prefix
-}RewriteRule ^/$src${trail:+(.*)} $prot://$host/cgi-bin/WebObjects/$dest${suffix:+/$suffix}${trail:+\$1} [L${options:+,$options}]" >>"$outfile"
-                url="http://$thishost/$usrc"
-                proxy_url="$prot://$host/cgi-bin/WebObjects/$dest${suffix:+/$suffix}"
+                echo "${prefix}RewriteRule ^/$src${trail:+(.*)} $(joinurl "$prot://$host/cgi-bin/WebObjects" "$dest" "$suffix" ${trail:+\$1}) [L${options:+,$options}]" >>"$outfile"
+                setx url joinurl "http://$thishost" "$usrc"
+                setx proxy_url joinurl "prot://$host/cgi-bin/WebObjects" "$dest" "$suffix"
             else
-                echo "${prefix:+$prefix
-}RewriteRule ^/$src\$ /$src/" >>"$outfile"
-                echo "${prefix:+$prefix
-}RewriteRule ^/$src/(.*) $prot://$host/cgi-bin/WebObjects/$dest${suffix:+/$suffix}/\$1 [L${options:+,$options}]" >>"$outfile"
-                url="http://$thishost/$usrc/"
-                proxy_url="$prot://$host/cgi-bin/WebObjects/$dest${suffix:+/$suffix}/"
+                echo "${prefix}RewriteRule ^/$src\$ /$src/" >>"$outfile"
+                echo "${prefix}RewriteRule ^/$src/(.*) $(joinurl "$prot://$host/cgi-bin/WebObjects" "$dest" "$suffix" "\$1") [L${options:+,$options}]" >>"$outfile"
+                setx url joinurl "http://$thishost" "$usrc/"
+                setx proxy_url joinurl "prot://$host/cgi-bin/WebObjects" "$dest" "$suffix/"
             fi
         else
             # sur le même hôte
             if [ -n "$noslash" ]; then
-                echo "${prefix:+$prefix
-}RewriteRule ^/$src${trail:+(.*)} /cgi-bin/WebObjects/$dest${suffix:+/$suffix}${trail:+\$1} [L,P${options:+,$options}]" >>"$outfile"
-                url="http://$thishost/$usrc"
+                echo "${prefix}RewriteRule ^/$src${trail:+(.*)} $(joinurl /cgi-bin/WebObjects "$dest" "$suffix" ${trail:+\$1}) [L,P${options:+,$options}]" >>"$outfile"
+                setx url joinurl "http://$thishost" "$usrc"
+                setx proxy_url joinurl "prot://$thishost/cgi-bin/WebObjects" "$dest" "$suffix"
                 proxy_use=1
-                proxy_url="http://$thishost/cgi-bin/WebObjects/$dest${suffix:+/$suffix}"
             else
-                echo "${prefix:+$prefix
-}RewriteRule ^/$src\$ /$src/" >>"$outfile"
-                echo "${prefix:+$prefix
-}RewriteRule ^/$src/(.*) /cgi-bin/WebObjects/$dest${suffix:+/$suffix}/\$1 [L,P${options:+,$options}]" >>"$outfile"
-                url="http://$thishost/$usrc/"
+                echo "${prefix}RewriteRule ^/$src\$ /$src/" >>"$outfile"
+                echo "${prefix}RewriteRule ^/$src/(.*) $(joinurl /cgi-bin/WebObjects "$dest" "$suffix" "\$1") [L,P${options:+,$options}]" >>"$outfile"
+                setx url joinurl "http://$thishost" "$usrc/"
+                setx proxy_url joinurl "prot://$thishost/cgi-bin/WebObjects" "$dest" "$suffix/"
                 proxy_use=1
-                proxy_url="http://$thishost/cgi-bin/WebObjects/$dest${suffix:+/$suffix}/"
             fi
         fi
     else
@@ -223,32 +234,26 @@ for rule in "${rules[@]}"; do
         if [ -n "$host" ]; then
             # sur un autre hôte
             if [ -n "$noslash" ]; then
-                echo "${prefix:+$prefix
-}RewriteRule ^/$src${trail:+(.*)} $prot://$host/$dest${suffix:+/$suffix}${trail:+\$1} [L${options:+,$options}]" >>"$outfile"
-                url="http://$thishost/$usrc"
-                proxy_url="$prot://$host/$dest${suffix:+/$suffix}"
+                echo "${prefix}RewriteRule ^/$src${trail:+(.*)} $(joinurl "$prot://$host" "$dest" "$suffix" ${trail:+\$1}) [L${options:+,$options}]" >>"$outfile"
+                setx url joinurl "http://$thishost" "$usrc"
+                setx proxy_url joinurl "prot://$host" "$dest" "$suffix"
             else
-                echo "${prefix:+$prefix
-}RewriteRule ^/$src\$ /$src/" >>"$outfile"
-                echo "${prefix:+$prefix
-}RewriteRule ^/$src/(.*) $prot://$host/$dest${suffix:+/$suffix}/\$1 [L${options:+,$options}]" >>"$outfile"
-                url="http://$thishost/$usrc/"
-                proxy_url="$prot://$host/$dest${suffix:+/$suffix}/"
+                echo "${prefix}RewriteRule ^/$src\$ /$src/" >>"$outfile"
+                echo "${prefix}RewriteRule ^/$src/(.*) $(joinurl "$prot://$host" "$dest" "$suffix" "\$1") [L${options:+,$options}]" >>"$outfile"
+                setx url joinurl "http://$thishost" "$usrc/"
+                setx proxy_url joinurl "$prot://$host" "$dest" "$suffix/"
             fi
         else
             # sur le même hôte
             if [ -n "$noslash" ]; then
-                echo "${prefix:+$prefix
-}RewriteRule ^/$src${trail:+(.*)} /$dest${suffix:+/$suffix}${trail:+\$1}${options:+ [$options]}" >>"$outfile"
-                url="http://$thishost/$usrc"
-                proxy_url="http://$thishost/$dest${suffix:+/$suffix}"
+                echo "${prefix}RewriteRule ^/$src${trail:+(.*)} $(joinurl / "$dest" "$suffix" ${trail:+\$1})${options:+ [$options]}" >>"$outfile"
+                setx url joinurl "http://$thishost" "$usrc"
+                setx proxy_url joinurl "http://$thishost" "$dest" "$suffix"
             else
-                echo "${prefix:+$prefix
-}RewriteRule ^/$src\$ /$src/" >>"$outfile"
-                echo "${prefix:+$prefix
-}RewriteRule ^/$src/(.*) /$dest${suffix:+/$suffix}/\$1${options:+ [$options]}" >>"$outfile"
-                url="http://$thishost/$usrc/"
-                proxy_url="http://$thishost/$dest${suffix:+/$suffix}/"
+                echo "${prefix}RewriteRule ^/$src\$ /$src/" >>"$outfile"
+                echo "${prefix}RewriteRule ^/$src/(.*) $(joinurl / "$dest" "$suffix" "\$1")${options:+ [$options]}" >>"$outfile"
+                setx url joinurl "http://$thishost" "$usrc/"
+                setx proxy_url joinurl "http://$thishost" "$dest" "$suffix/"
             fi
         fi
     fi