download() stop script if 404

init.sh

@@ -94,87 +94,94 @@ process_args() {
 }
 
 usage() {
-    cat << EOF
+cat << EOF
 USAGE: ${0} [-a architecture] [-b] 
-    -a | --arch         Select CPU Architecture amd64 | i386 CPU
-    -b | --bios         Create a bios bott compatible key 
-    -d | --device       Device_block USB key to write
-    --debian-version    Choose Debian Version to download
-    --repo              Repo directory (defaukt is ./repo)
-    --temp              Temp directory (default is ./tmp)
-    -v | --version      Show version
-    
+-a | --arch         Select CPU Architecture amd64 | i386 CPU
+-b | --bios         Create a bios bott compatible key 
+-d | --device       Device_block USB key to write
+--debian-version    Choose Debian Version to download
+--repo              Repo directory (defaukt is ./repo)
+--temp              Temp directory (default is ./tmp)
+-v | --version      Show version
+
 ${0} initialize an usb key for Debian automatic install with preseed and a partman recipe.
 EOF
 }
 
 show_version () {
-    printf "%s %s 2016-2017 ephase@xieme-art.org\n" "$APP_NAME" "$VERSION"
+printf "%s %s 2016-2017 ephase@xieme-art.org\n" "$APP_NAME" "$VERSION"
 }
 
 download (){
-    #Download function
-    # $1 : filename
-    # $2 : url
-    # $3 : 1 if abort download if file exist
-    printf "Downloading %s :    " "$1"
+#Download function
+# $1 : filename
+# $2 : url
+# $3 : 1 if abort download if file exist
+printf "Downloading %s :    " "$1"
+http_response=$(wget --spider --server-response $2/$1 2>&1 | grep HTTP/ | tail -1 |  awk ' { printf $2 }')
+if [ $http_response -eq 200 ]
+then
     wget -c --progress=dot $2/$1 2>&1 | grep --line-buffered "[0-9]\{1,3\}%" -o | awk '{printf ("\b\b\b\b%4s", $1)}'
-    if [  $? -eq 0 ]
+    if [ $? -eq 0 ]
     then
         printf " \b\b\b\b\b done\n "
     else
         printf " error, exiting.\n"
         exit 1
     fi
+else
+    printf "Error 404 : file not found, exiting\n"
+    exit 1
+fi
 }
 
 process_conf_file (){
-    for p in `cat $1 | grep '^[^#].*'`
-    do
-       var=`echo "$p" | awk -F"=" '{print $1}'`
-       param=`echo "$p" | awk -F"=" '{print $2}'`
-       eval $var=$param
-    done
+for p in `cat $1 | grep '^[^#].*'`
+do
+   var=`echo "$p" | awk -F"=" '{print $1}'`
+   param=`echo "$p" | awk -F"=" '{print $2}'`
+   eval $var=$param
+done
 }
 
 create_dir(){
-    # $1 directory to create
-    if [ ! -d $1 ]
-    then 
-        mkdir -p $1
-    else
-        if [[ $2 == 1 ]]
-        then
-            rm -rf $1
-            create_dir $1
-        fi
+# $1 directory to create
+if [ ! -d $1 ]
+then 
+    mkdir -p $1
+else
+    if [[ $2 == 1 ]]
+    then
+        rm -rf $1
+        create_dir $1
     fi
+fi
 }
 
 # unmount if device is mounted
 umount_device (){
-    local mounted_part=$(mount | grep "${1}[0-9]" | awk '{print $3}')
-    if [ ! -z mounted_part ]
-    then
-        for part in $mounted_part
-        do
-            if [ -d $part ]
-            then
-                printf "Unmount %s\n " "$part"
-                umount $part --recursive
-            fi
-        done
-    fi
+local mounted_part=$(mount | grep "${1}[0-9]" | awk '{print $3}')
+if [ ! -z mounted_part ]
+then
+    for part in $mounted_part
+    do
+        if [ -d $part ]
+        then
+            printf "Unmount %s\n " "$part"
+            umount $part --recursive
+        fi
+    done
+fi
 }
 
 efi_create_key_structure () {
-    parted -s $1 mklabel gpt mkpart EFS fat32 1MiB 128MiB set 1 boot on mkpart debian fat32 128MiB 100%
-    sleep 2
-    mkfs.vfat ${1}1 -n efi &> /dev/null
-    mkfs.vfat ${1}2 -n debian &> /dev/null
-    mount ${1}2 $2
-    create_dir $2/efi
-    mount ${1}1 $2/efi
+parted -s $1 mklabel gpt mkpart EFS fat32 1MiB 128MiB set 1 boot on mkpart debian fat32 128MiB 100%
+sleep 2
+mkfs.vfat ${1}1 -n efi &> /dev/null
+mkfs.vfat ${1}2 -n debian &> /dev/null
+mount ${1}2 $2
+create_dir $2/efi
+mount ${1}1 $2/efi
 }
 
 bios_create_key_structure() {