tradingview-screener-ts
Version:
TypeScript port of TradingView Screener with 100% Python parity - Based on the original Python library by shner-elmo (https://github.com/shner-elmo/TradingView-Screener)
460 lines • 14.9 kB
JavaScript
;
/**
* Advanced security utilities and validation
*
* This module provides enterprise-grade security features including
* input validation, sanitization, and secure request handling.
*/
Object.defineProperty(exports, "__esModule", { value: true });
exports.Security = exports.CryptoUtils = exports.SecurityAuditor = exports.ErrorSanitizer = exports.RequestSanitizer = exports.InputValidator = void 0;
/**
* Input validation utilities
*/
class InputValidator {
/**
* Validate market codes against whitelist
*/
static validateMarkets(markets) {
if (!Array.isArray(markets)) {
throw new Error('Markets must be an array');
}
const validMarkets = [
'america',
'canada',
'brazil',
'mexico',
'uk',
'germany',
'france',
'italy',
'spain',
'netherlands',
'switzerland',
'sweden',
'norway',
'finland',
'denmark',
'belgium',
'austria',
'poland',
'portugal',
'greece',
'hungary',
'czech',
'russia',
'turkey',
'israel',
'japan',
'china',
'hongkong',
'india',
'singapore',
'korea',
'taiwan',
'australia',
'newzealand',
'southafrica',
'egypt',
'nigeria',
'crypto',
'forex',
'coin',
'cfd',
'futures',
'bonds',
'economy',
'options',
];
const sanitized = markets
.filter(market => typeof market === 'string')
.map(market => market.toLowerCase().trim())
.filter(market => validMarkets.includes(market));
return [...new Set(sanitized)]; // Remove duplicates
}
/**
* Validate column names against injection attacks
*/
static validateColumns(columns) {
if (!Array.isArray(columns)) {
throw new Error('Columns must be an array');
}
const columnPattern = /^[a-zA-Z0-9_.\-/]+$/;
const maxLength = 100;
return columns
.filter(col => typeof col === 'string')
.map(col => col.trim())
.filter(col => {
if (col.length === 0 || col.length > maxLength)
return false;
if (!columnPattern.test(col))
return false;
// Block potential SQL injection patterns
const dangerousPatterns = [
/union\s+select/i,
/drop\s+table/i,
/delete\s+from/i,
/insert\s+into/i,
/update\s+set/i,
/exec\s*\(/i,
/script\s*>/i,
/<\s*script/i,
];
return !dangerousPatterns.some(pattern => pattern.test(col));
});
}
/**
* Validate numeric values
*/
static validateNumber(value, min, max) {
const num = Number(value);
if (!Number.isFinite(num)) {
throw new Error(`Invalid number: ${value}`);
}
if (min !== undefined && num < min) {
throw new Error(`Number ${num} is below minimum ${min}`);
}
if (max !== undefined && num > max) {
throw new Error(`Number ${num} is above maximum ${max}`);
}
return num;
}
/**
* Validate and sanitize filter operations
*/
static validateFilterOperation(operation) {
const validOperations = [
'greater',
'egreater',
'less',
'eless',
'equal',
'nequal',
'in_range',
'not_in_range',
'match',
'nmatch',
'in_day_range',
'in_week_range',
'in_month_range',
'crosses',
'crosses_above',
'crosses_below',
'above_pct',
'below_pct',
'between_pct',
'not_between_pct',
'empty',
'nempty',
];
if (typeof operation !== 'string') {
throw new Error('Operation must be a string');
}
const sanitized = operation.toLowerCase().trim();
if (!validOperations.includes(sanitized)) {
throw new Error(`Invalid operation: ${operation}`);
}
return sanitized;
}
/**
* Validate URL for security
*/
static validateUrl(url) {
try {
const parsed = new URL(url);
// Only allow HTTPS for security
if (parsed.protocol !== 'https:') {
throw new Error('Only HTTPS URLs are allowed');
}
// Whitelist allowed domains
const allowedDomains = [
'scanner.tradingview.com',
'symbol-search.tradingview.com',
'pine-facade.tradingview.com',
];
if (!allowedDomains.includes(parsed.hostname)) {
throw new Error(`Domain not allowed: ${parsed.hostname}`);
}
return url;
}
catch (error) {
throw new Error(`Invalid URL: ${error instanceof Error ? error.message : 'Unknown error'}`);
}
}
}
exports.InputValidator = InputValidator;
/**
* Request sanitizer for secure HTTP requests
*/
class RequestSanitizer {
/**
* Sanitize request headers
*/
static sanitizeHeaders(headers) {
const sanitized = {};
const allowedHeaders = [
'user-agent',
'accept',
'accept-language',
'accept-encoding',
'content-type',
'authorization',
'cookie',
'referer',
'origin',
];
for (const [key, value] of Object.entries(headers)) {
const normalizedKey = key.toLowerCase().trim();
if (allowedHeaders.includes(normalizedKey)) {
// Sanitize header value
const sanitizedValue = String(value)
.replace(/[\r\n]/g, '') // Remove CRLF injection
.trim()
.slice(0, 1000); // Limit length
if (sanitizedValue.length > 0) {
sanitized[normalizedKey] = sanitizedValue;
}
}
}
return sanitized;
}
/**
* Sanitize cookies
*/
static sanitizeCookies(cookies) {
if (typeof cookies !== 'string') {
return '';
}
// Remove potentially dangerous characters
return cookies
.replace(/[<>"']/g, '') // Remove HTML/JS injection chars
.replace(/[\r\n]/g, '') // Remove CRLF injection
.trim()
.slice(0, 4096); // Limit cookie length
}
/**
* Generate secure request configuration
*/
static createSecureConfig(config = {}) {
return {
timeout: Math.min(config.timeout || 30000, 60000), // Max 60s timeout
maxRedirects: 0, // Disable redirects for security
validateStatus: (status) => status >= 200 && status < 300,
headers: {
'User-Agent': 'tradingview-screener-ts/1.0.0',
Accept: 'application/json',
'Accept-Language': 'en-US,en;q=0.9',
'Accept-Encoding': 'gzip, deflate, br',
DNT: '1',
'Sec-Fetch-Dest': 'empty',
'Sec-Fetch-Mode': 'cors',
'Sec-Fetch-Site': 'cross-site',
...this.sanitizeHeaders(config.headers || {}),
},
...(config.cookies && {
headers: {
...this.sanitizeHeaders(config.headers || {}),
Cookie: this.sanitizeCookies(config.cookies),
},
}),
};
}
}
exports.RequestSanitizer = RequestSanitizer;
/**
* Error sanitizer to prevent information leakage
*/
class ErrorSanitizer {
/**
* Sanitize error messages for public consumption
*/
static sanitizeError(error) {
if (!(error instanceof Error)) {
return new Error('An unknown error occurred');
}
// Remove sensitive information from error messages
let message = error.message;
// Remove file paths
message = message.replace(/\/[^\s]+/g, '[PATH]');
message = message.replace(/[A-Z]:\\[^\s]+/g, '[PATH]');
// Remove IP addresses
message = message.replace(/\b\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}\b/g, '[IP]');
// Remove potential API keys or tokens
message = message.replace(/[a-zA-Z0-9]{20,}/g, '[TOKEN]');
// Remove SQL-like patterns
message = message.replace(/SELECT\s+.*FROM\s+/gi, '[SQL_QUERY]');
// Generic error for network issues
if (message.includes('ENOTFOUND') || message.includes('ECONNREFUSED')) {
message = 'Network connection failed';
}
if (message.includes('timeout')) {
message = 'Request timeout';
}
if (message.includes('401') || message.includes('403')) {
message = 'Authentication required';
}
if (message.includes('429')) {
message = 'Rate limit exceeded';
}
if (message.includes('500') || message.includes('502') || message.includes('503')) {
message = 'Server error';
}
return new Error(message);
}
/**
* Create safe error response
*/
static createSafeErrorResponse(error) {
const sanitized = this.sanitizeError(error);
return {
success: false,
error: sanitized.message,
code: this.getErrorCode(error),
timestamp: new Date().toISOString(),
};
}
/**
* Get safe error code
*/
static getErrorCode(error) {
if (error?.response?.status) {
return `HTTP_${error.response.status}`;
}
if (error?.code) {
const safeCodes = ['ENOTFOUND', 'ECONNREFUSED', 'TIMEOUT', 'ABORT'];
return safeCodes.includes(error.code) ? error.code : 'UNKNOWN';
}
return 'UNKNOWN';
}
}
exports.ErrorSanitizer = ErrorSanitizer;
/**
* Security audit utilities
*/
class SecurityAuditor {
/**
* Audit query for potential security issues
*/
static auditQuery(query) {
const warnings = [];
const recommendations = [];
// Check for overly broad queries
if (!query.filter && !query.filter2) {
warnings.push('Query has no filters - may return excessive data');
recommendations.push('Add filters to limit result set');
}
// Check for large limits
if (query.range && query.range[1] - query.range[0] > 1000) {
warnings.push('Large result set requested');
recommendations.push('Consider pagination for large datasets');
}
// Check for suspicious column names
if (query.columns) {
const suspiciousPatterns = [/script/i, /eval/i, /function/i, /javascript/i];
const suspiciousColumns = query.columns.filter((col) => suspiciousPatterns.some(pattern => pattern.test(col)));
if (suspiciousColumns.length > 0) {
warnings.push(`Suspicious column names detected: ${suspiciousColumns.join(', ')}`);
recommendations.push('Review column names for potential security issues');
}
}
return {
isSecure: warnings.length === 0,
warnings,
recommendations,
};
}
/**
* Generate security report
*/
static generateSecurityReport() {
return {
version: '1.0.0',
securityFeatures: [
'Input validation and sanitization',
'SQL injection prevention',
'XSS protection',
'HTTPS enforcement',
'Domain whitelisting',
'Rate limiting',
'Error message sanitization',
'Secure header handling',
'Cookie sanitization',
'Request timeout limits',
],
compliance: [
'OWASP Top 10 protection',
'Secure coding practices',
'Data privacy protection',
'No sensitive data logging',
],
lastAudit: new Date().toISOString(),
};
}
}
exports.SecurityAuditor = SecurityAuditor;
/**
* Crypto utilities for secure operations
*/
class CryptoUtils {
/**
* Generate secure random string
*/
static generateSecureId(length = 16) {
const chars = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789';
let result = '';
if (typeof crypto !== 'undefined' && crypto.getRandomValues) {
// Browser environment
const array = new Uint8Array(length);
crypto.getRandomValues(array);
for (let i = 0; i < length; i++) {
result += chars[array[i] % chars.length];
}
}
else if (typeof require !== 'undefined') {
// Node.js environment
try {
const nodeCrypto = require('crypto');
const bytes = nodeCrypto.randomBytes(length);
for (let i = 0; i < length; i++) {
result += chars[bytes[i] % chars.length];
}
}
catch {
// Fallback to Math.random (less secure)
for (let i = 0; i < length; i++) {
result += chars[Math.floor(Math.random() * chars.length)];
}
}
}
else {
// Fallback to Math.random (less secure)
for (let i = 0; i < length; i++) {
result += chars[Math.floor(Math.random() * chars.length)];
}
}
return result;
}
/**
* Hash string for comparison (simple implementation)
*/
static simpleHash(str) {
let hash = 0;
for (let i = 0; i < str.length; i++) {
const char = str.charCodeAt(i);
hash = (hash << 5) - hash + char;
hash = hash & hash; // Convert to 32-bit integer
}
return Math.abs(hash).toString(36);
}
}
exports.CryptoUtils = CryptoUtils;
/**
* Export all security utilities
*/
exports.Security = {
InputValidator,
RequestSanitizer,
ErrorSanitizer,
SecurityAuditor,
CryptoUtils,
};
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