max filesize

sup

@@ -15,6 +15,7 @@ cfg_url_regex='^[A-Za-z]([A-Za-z0-9+.-]+)?://.+'
 cfg_tmp_dir="$XDG_RUNTIME_DIR/sup"; TEMPDIR="$cfg_tmp_dir"
 cfg_service_url='https://8fw.me'
 cfg_screenshot_ext='png'
+cfg_max_filesize='200M'
 
 [[ -f $HOME/.suprc ]] && { source "$HOME/.suprc"; }
 
@@ -42,10 +43,12 @@ sup.usage() {
 		        -D <num>             # Delay the shot by <num> seconds.
 		        -p                   # Make the file private. Requires \$secret to be set in the config.
 		        -u                   # Generate a shortlink from URL.
+				  -m                   # Maximum filesize (in megabytes)
 		
 		    Config options (~/.suprc):
 		        secret               # Your personal token. Get it at https://zfh.so/settings_form
 		        cfg_screenshot_ext   # Screenshot file type, used by scrot.
+				  cfg_max_filesize     # Maximum filesize in megabytes.
 		        # Others are self-explanatory:
 		        cfg_url_regex
 		        cfg_tmp_dir
@@ -63,6 +66,22 @@ sup.get_hash() {
 	read file_hash _ < <( sha1sum "$1" )
 }
 
+sup.get_max_filesize() {
+	if [[ $cfg_max_filesize =~ ^[0-9]+[BKMG]?$ ]]; then
+		max_filesize_base="${cfg_max_filesize//[BKMG]/}"
+
+		case "$cfg_max_filesize" in
+			*K) max_filesize_bytes=$(( max_filesize_base * 1024 ));;
+			*M) max_filesize_bytes=$(( max_filesize_base * 1024 * 1024 ));;
+			*G) max_filesize_bytes=$(( max_filesize_base * 1024 * 1024 * 1024 ));;
+			*) max_filesize_bytes=$max_filesize_base;;
+		esac
+	else
+		sup.err "Wrong cfg_max_filesize: $cfg_max_filesize"
+		return 1
+	fi
+}
+
 sup.upload() {
 	if (( flag_scrot )); then
 		flag_rm=1
@@ -79,10 +98,19 @@ sup.upload() {
 			flag_rm=1
 			file=$(sup.mktemp "$cfg_tmp_dir")
 
-			curl -skL "$target" > "$file" || {
-				sup.err "Could not download file."
+			sup.get_max_filesize || { return 1; }
+
+			curl --max-filesize "$max_filesize_bytes" -skL "$target" > "$file"
+			curl_result=$?
+
+			if (( curl_result )); then
+				case "$curl_result" in
+					63) sup.err "File exceeds cfg_max_filesize";;
+					*) sup.err "Could not download file.";;
+				esac
+
 				return 1
-			}
+			fi
 		else
 			file="$target"