76 lines
1.7 KiB
Go
76 lines
1.7 KiB
Go
package finnhub
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import (
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"encoding/json"
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"fmt"
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"net/http"
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"time"
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)
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const baseURL = "https://finnhub.io/api/v1"
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type Client struct {
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apiKey string
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http *http.Client
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}
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type NewsItem struct {
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ID int `json:"id"`
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Category string `json:"category"`
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Datetime int64 `json:"datetime"`
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Headline string `json:"headline"`
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Related string `json:"related"`
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Source string `json:"source"`
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URL string `json:"url"`
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Summary string `json:"summary"`
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}
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func New(apiKey string) *Client {
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return &Client{
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apiKey: apiKey,
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http: &http.Client{Timeout: 10 * time.Second},
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}
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}
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func (c *Client) CompanyNews(symbol, from, to string) ([]NewsItem, error) {
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url := fmt.Sprintf("%s/company-news?symbol=%s&from=%s&to=%s&token=%s",
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baseURL, symbol, from, to, c.apiKey)
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return c.fetchNews(url)
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}
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func (c *Client) MarketNews() ([]NewsItem, error) {
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url := fmt.Sprintf("%s/news?category=general&token=%s", baseURL, c.apiKey)
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return c.fetchNews(url)
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}
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func (c *Client) Ping() error {
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url := fmt.Sprintf("%s/news?category=general&minId=999999999&token=%s", baseURL, c.apiKey)
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resp, err := c.http.Get(url)
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if err != nil {
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return err
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}
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defer resp.Body.Close()
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if resp.StatusCode == 401 || resp.StatusCode == 403 {
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return fmt.Errorf("invalid API key (HTTP %d)", resp.StatusCode)
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}
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return nil
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}
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func (c *Client) fetchNews(url string) ([]NewsItem, error) {
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resp, err := c.http.Get(url)
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if err != nil {
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return nil, err
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}
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defer resp.Body.Close()
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if resp.StatusCode != 200 {
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return nil, fmt.Errorf("finnhub: HTTP %d", resp.StatusCode)
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}
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var items []NewsItem
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if err := json.NewDecoder(resp.Body).Decode(&items); err != nil {
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return nil, err
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}
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return items, nil
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}
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