@fin.cx/opendata
Version:
A comprehensive TypeScript library for accessing business data and real-time financial information. Features include German company data management with MongoDB integration, JSONL bulk processing, automated Handelsregister interactions, and real-time stoc
169 lines • 14.7 kB
JavaScript
import * as plugins from '../../plugins.js';
export class YahooFinanceProvider {
config;
name = 'Yahoo Finance';
priority = 100;
requiresAuth = false;
rateLimit = {
requestsPerMinute: 100, // Conservative estimate
requestsPerDay: undefined
};
logger = console;
baseUrl = 'https://query1.finance.yahoo.com';
userAgent = 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0.0.0 Safari/537.36';
constructor(config) {
this.config = config;
}
/**
* Unified data fetching method
*/
async fetchData(request) {
switch (request.type) {
case 'current':
return this.fetchCurrentPrice(request);
case 'batch':
return this.fetchBatchCurrentPrices(request);
case 'historical':
throw new Error('Yahoo Finance provider does not support historical data. Use Marketstack provider instead.');
case 'intraday':
throw new Error('Yahoo Finance provider does not support intraday data yet. Use Marketstack provider instead.');
default:
throw new Error(`Unsupported request type: ${request.type}`);
}
}
/**
* Fetch current price for a single ticker
*/
async fetchCurrentPrice(request) {
try {
const url = `${this.baseUrl}/v8/finance/chart/${request.ticker}`;
const response = await plugins.smartrequest.SmartRequest.create()
.url(url)
.headers({
'User-Agent': this.userAgent
})
.timeout(this.config?.timeout || 10000)
.get();
const responseData = await response.json();
if (!responseData?.chart?.result?.[0]) {
throw new Error(`No data found for ticker ${request.ticker}`);
}
const data = responseData.chart.result[0];
const meta = data.meta;
if (!meta.regularMarketPrice) {
throw new Error(`No price data available for ${request.ticker}`);
}
const stockPrice = {
ticker: request.ticker.toUpperCase(),
price: meta.regularMarketPrice,
currency: meta.currency || 'USD',
change: meta.regularMarketPrice - meta.previousClose,
changePercent: ((meta.regularMarketPrice - meta.previousClose) / meta.previousClose) * 100,
previousClose: meta.previousClose,
timestamp: new Date(meta.regularMarketTime * 1000),
provider: this.name,
marketState: this.determineMarketState(meta),
exchange: meta.exchange,
exchangeName: meta.exchangeName,
dataType: 'live', // Yahoo provides real-time/near real-time data
fetchedAt: new Date()
};
return stockPrice;
}
catch (error) {
console.error(`Failed to fetch price for ${request.ticker}:`, error);
throw new Error(`Yahoo Finance: Failed to fetch price for ${request.ticker}: ${plugins.getErrorMessage(error)}`);
}
}
/**
* Fetch batch current prices
*/
async fetchBatchCurrentPrices(request) {
try {
const symbols = request.tickers.join(',');
const url = `${this.baseUrl}/v8/finance/spark?symbols=${symbols}&range=1d&interval=5m`;
const response = await plugins.smartrequest.SmartRequest.create()
.url(url)
.headers({
'User-Agent': this.userAgent
})
.timeout(this.config?.timeout || 15000)
.get();
const responseData = await response.json();
const prices = [];
for (const [ticker, data] of Object.entries(responseData)) {
if (!data || typeof data !== 'object')
continue;
const sparkData = data;
if (!sparkData.previousClose || !sparkData.close?.length) {
console.warn(`Incomplete data for ${ticker}, skipping`);
continue;
}
const currentPrice = sparkData.close[sparkData.close.length - 1];
const timestamp = sparkData.timestamp?.[sparkData.timestamp.length - 1];
prices.push({
ticker: ticker.toUpperCase(),
price: currentPrice,
currency: sparkData.currency || 'USD',
change: currentPrice - sparkData.previousClose,
changePercent: ((currentPrice - sparkData.previousClose) / sparkData.previousClose) * 100,
previousClose: sparkData.previousClose,
timestamp: timestamp ? new Date(timestamp * 1000) : new Date(),
provider: this.name,
marketState: sparkData.marketState || 'REGULAR',
exchange: sparkData.exchange,
exchangeName: sparkData.exchangeName,
dataType: 'live', // Yahoo provides real-time/near real-time data
fetchedAt: new Date()
});
}
if (prices.length === 0) {
throw new Error('No valid price data received from batch request');
}
return prices;
}
catch (error) {
console.error(`Failed to fetch batch prices:`, error);
throw new Error(`Yahoo Finance: Failed to fetch batch prices: ${plugins.getErrorMessage(error)}`);
}
}
async isAvailable() {
try {
// Test with a well-known ticker
await this.fetchData({ type: 'current', ticker: 'AAPL' });
return true;
}
catch (error) {
console.warn('Yahoo Finance provider is not available:', error);
return false;
}
}
supportsMarket(market) {
// Yahoo Finance supports most major markets
const supportedMarkets = ['US', 'UK', 'DE', 'FR', 'JP', 'CN', 'HK', 'AU', 'CA'];
return supportedMarkets.includes(market.toUpperCase());
}
supportsTicker(ticker) {
// Basic validation - Yahoo supports most tickers
return /^[A-Z0-9\.\-]{1,10}$/.test(ticker.toUpperCase());
}
determineMarketState(meta) {
const marketState = meta.marketState?.toUpperCase();
switch (marketState) {
case 'PRE':
return 'PRE';
case 'POST':
return 'POST';
case 'REGULAR':
return 'REGULAR';
default:
// Check if market is currently open based on timestamps
const now = Date.now() / 1000;
const regularMarketTime = meta.regularMarketTime;
const timeDiff = now - regularMarketTime;
// If last update was more than 1 hour ago, market is likely closed
return timeDiff > 3600 ? 'CLOSED' : 'REGULAR';
}
}
}
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