refactor: preserve terminal screen and scrollbuffer (#13)

Maintain the terminal output. If clearing the screen and scrollbuffer is desired, it should be wrapped in an upstream script.

Reviewed-on: https://codeberg.org/vlw/curl/pulls/13

curl.sh

@@ -23,8 +23,11 @@ method="${2:-GET}"
 if [ -f $REQ_PARAMS_FILE ]; then
     # Parse each newline as a separate parameter joined by a "&"
     params=$(tr '\n' '&' < "$REQ_PARAMS_FILE" | sed 's/&$//')
+
+    if [ -n "$params" ]; then
         url="${url}?${params}"
     fi
+fi
 
 # Prepare curl
 curl_cmd="curl -s"
@@ -63,9 +66,7 @@ fi
 # Save the response headers and body
 curl_cmd="$curl_cmd -o $RESP_BODY_RAW_FILE -D $RESP_HEADERS_FILE"
 
-# Execute curl
-eval "clear"
-
+# Dispatch request
 echo -e "\e[0;92mRequest  >\e[0m ${method} ${url}"
 eval $curl_cmd