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package client
import (
"bufio"
"context"
"fmt"
"io"
"net"
"net/http"
"net/url"
"time"
)
type idleTimeoutConn struct {
net.Conn
idleTimeout time.Duration
}
func (c *idleTimeoutConn) Read(b []byte) (int, error) {
if err := c.Conn.SetReadDeadline(time.Now().Add(c.idleTimeout)); err != nil {
return 0, err
}
return c.Conn.Read(b)
}
func (c *Client) CrawlDomain(domain string, subdomains bool, callback func(line string) error) error {
path := fmt.Sprintf("/crawl/%s", url.PathEscape(domain))
fullURL := c.config.BaseURL + path
if subdomains {
params := url.Values{}
params.Set("subdomains", "true")
fullURL += "?" + params.Encode()
}
ctx := context.Background()
req, err := http.NewRequestWithContext(ctx, http.MethodGet, fullURL, nil)
if err != nil {
return fmt.Errorf("failed to create request: %w", err)
}
req.Header.Set("User-Agent", c.config.UserAgent)
idleTimeout := 60 * time.Second
streamClient := &http.Client{
Transport: &http.Transport{
DialContext: func(ctx context.Context, network, addr string) (net.Conn, error) {
conn, err := (&net.Dialer{
Timeout: 30 * time.Second,
KeepAlive: 30 * time.Second,
}).DialContext(ctx, network, addr)
if err != nil {
return nil, err
}
return &idleTimeoutConn{
Conn: conn,
idleTimeout: idleTimeout,
}, nil
},
},
}
resp, err := streamClient.Do(req)
if err != nil {
return fmt.Errorf("failed to execute request: %w", err)
}
defer resp.Body.Close()
if resp.StatusCode != http.StatusOK {
body, _ := io.ReadAll(resp.Body)
return fmt.Errorf("API request failed with status %d: %s", resp.StatusCode, string(body))
}
scanner := bufio.NewScanner(resp.Body)
for scanner.Scan() {
line := scanner.Text()
if len(line) == 0 {
continue
}
if err := callback(line); err != nil {
return err
}
}
if err := scanner.Err(); err != nil {
return fmt.Errorf("stream reading error: %w", err)
}
return nil
}
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