cui-server/dist/middleware/query-parser.js

Web UI Agent Platform based on Claude Code

/**
 * Middleware to parse and convert query parameters to their proper types
 *
 * This middleware automatically converts:
 * - Numeric strings to numbers
 * - Boolean strings ('true', 'false') to booleans
 * - Preserves other types as-is
 */
export function queryParser(req, res, next) {
    if (!req.query || typeof req.query !== 'object') {
        return next();
    }
    // Create a new object to store converted values
    const convertedQuery = {};
    for (const [key, value] of Object.entries(req.query)) {
        // Handle array values (e.g., ?key=1&key=2)
        if (Array.isArray(value)) {
            convertedQuery[key] = value.map(v => convertValue(v));
        }
        else {
            convertedQuery[key] = convertValue(value);
        }
    }
    // Replace the original query with converted values
    // eslint-disable-next-line @typescript-eslint/no-explicit-any
    req.query = convertedQuery; // Express query type expects string | string[], but we're converting to proper types
    next();
}
/**
 * Convert a single value to its appropriate type
 */
function convertValue(value) {
    // Handle null and undefined
    if (value === null || value === undefined) {
        return value;
    }
    // If already a number or boolean, return as-is
    if (typeof value === 'number' || typeof value === 'boolean') {
        return value;
    }
    // If not a string, convert to string
    if (typeof value !== 'string') {
        return String(value);
    }
    // Empty string remains empty string
    if (value === '') {
        return value;
    }
    // Boolean conversion
    if (value.toLowerCase() === 'true') {
        return true;
    }
    if (value.toLowerCase() === 'false') {
        return false;
    }
    // Number conversion
    // Check if it's a valid number (including decimals)
    if (/^-?\d+(\.\d+)?$/.test(value)) {
        const num = Number(value);
        // Ensure the conversion didn't produce NaN or Infinity
        if (!isNaN(num) && isFinite(num)) {
            return num;
        }
    }
    // Return original string if no conversion applied
    return value;
}
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