eget: real get_filename implementation

bin/tools_eget

@@ -710,10 +710,37 @@ url_check()
     __wget --spider -S "$URL" 2>&1 | grep "HTTP/" | tail -n1 | grep -q "200"
 }
 
+url_get_headers()
+{
+    local URL="$1"
+    __wget --spider -S "$URL" 2>&1 | grep "^  [A-Z].*: " | sed -e 's|^  ||'
+}
+
+url_get_header()
+{
+    local URL="$1"
+    local HEADER="$2"
+    url_get_headers "$URL" | grep "^$HEADER: " | sed -e "s|^$HEADER: ||"
+}
+
 url_get_filename()
 {
-    # FIXME
-    basename "$1"
+    local URL="$1"
+    # FIXME with wget
+    local cd="$(url_get_header "$URL" "Content-Disposition")"
+    if echo "$cd" | grep -q "filename=" ; then
+        #Content-Disposition: attachment; filename=postman-linux-x64.tar.gz
+        echo "$cd" | sed -e 's|.*filename=||'
+        return
+    fi
+
+   local loc="$(url_get_header "$URL" "Location" | tail -n1)"
+    if is_url "$loc" ; then
+        basename "$loc"
+        return
+    fi
+
+    basename "$URL"
 }
 
 else
@@ -755,10 +782,38 @@ url_check()
     __curl -LI "$URL" 2>&1 | grep "HTTP/" | tail -n1 | grep -q -w "200\|404"
 }
 
+url_get_headers()
+{
+    local URL="$1"
+    __curl -LI "$URL" 2>&1 | grep "^[a-z].*: " | sed -e 's|\r$||'
+}
+
+# TODO: the same code in wget case, but there other header names
+url_get_header()
+{
+    local URL="$1"
+    local HEADER="$2"
+    url_get_headers "$URL" | grep "^$HEADER: " | sed -e "s|^$HEADER: ||"
+}
+
 url_get_filename()
 {
-    # FIXME
-    basename "$1"
+    local URL="$1"
+    # FIXME with wget
+    local cd="$(url_get_header "$URL" "content-disposition")"
+    if echo "$cd" | grep -q "filename=" ; then
+        #Content-Disposition: attachment; filename=postman-linux-x64.tar.gz
+        echo "$cd" | sed -e 's|.*filename=||'
+        return
+    fi
+
+   local loc="$(url_get_header "$URL" "location" | tail -n1)"
+    if is_url "$loc" ; then
+        basename "$loc"
+        return
+    fi
+
+    basename "$URL"
 }
 
 
@@ -938,7 +993,6 @@ get_urls()
 }
 
 
-
 if [ -n "$CHECKURL" ] ; then
     #set_quiet
     check_url_is_accessible "$1"