Enhance upload scripts with command-line options and JavaScript implementation

- Add -u/--url option to specify API URL via command line
- Refactor usage messages into centralized show_usage() function
- Remove environment variable fallback for API_URL
- Use curl's native file handling with --data @file
- Add JavaScript version (upload.js) with identical functionality
- Both scripts support same command-line interface and options

scripts/upload.sh

@@ -1,16 +1,57 @@
 #!/bin/bash
 
 # JMESPath Playground Upload Script
-# Usage: ./upload.sh "json_file.json"
+# Usage: ./upload.sh [-u URL] "json_file.json"
 
-if [ $# -ne 1 ]; then
-    echo "Usage: $0 <json_file>"
-    echo "Example: $0 data.json"
+show_usage() {
+    echo "Usage: $0 [-u|--url URL] <json_file>"
+    echo ""
+    echo "Options:"
+    echo "  -u, --url URL    API URL (default: http://localhost:3000)"
+    echo "  -h, --help       Show this help message"
+    echo ""
+    echo "Example:"
+    echo "  $0 data.json"
+    echo "  $0 -u http://example.com:3000 data.json"
+}
+
+# Parse command line options
+API_URL="http://localhost:3000"
+JSON_FILE=""
+
+while [[ $# -gt 0 ]]; do
+    case $1 in
+        -u|--url)
+            API_URL="$2"
+            shift 2
+            ;;
+        -h|--help)
+            show_usage
+            exit 0
+            ;;
+        -*)
+            echo "Error: Unknown option $1"
+            show_usage
+            exit 1
+            ;;
+        *)
+            if [ -z "$JSON_FILE" ]; then
+                JSON_FILE="$1"
+            else
+                echo "Error: Multiple JSON files specified"
+                exit 1
+            fi
+            shift
+            ;;
+    esac
+done
+
+if [ -z "$JSON_FILE" ]; then
+    echo "Error: JSON file required"
+    show_usage
     exit 1
 fi
 
-JSON_FILE="$1"
-
 if [ ! -f "$JSON_FILE" ]; then
     echo "Error: JSON file '$JSON_FILE' not found"
     exit 1
@@ -24,9 +65,6 @@ if command -v jq >/dev/null 2>&1; then
     fi
 fi
 
-JSON_DATA=$(cat "$JSON_FILE")
-API_URL="${API_URL:-http://localhost:3000}"
-
 echo "Uploading sample data to JMESPath Playground..."
 echo "JSON file: $JSON_FILE"
 echo "API URL: $API_URL"
@@ -35,7 +73,7 @@ echo
 # Upload the JSON data
 curl -s -X POST \
     -H "Content-Type: application/json" \
-    -d "$JSON_DATA" \
+    --data @"$JSON_FILE" \
     "$API_URL/api/v1/upload"
 
 echo