\n")
if len(gourl) > 4 {
capture(gourl, out)
}
fmt.Fprintf(out, "\n\n")
}
func imgServer(out http.ResponseWriter, req *http.Request) {
log.Printf("%s Img Request for %s\n", req.RemoteAddr, req.URL.Path)
gifbuf := gifmap[req.URL.Path]
defer delete(gifmap, req.URL.Path)
out.Header().Set("Content-Type", "image/gif")
out.Header().Set("Content-Length", strconv.Itoa(len(gifbuf.Bytes())))
out.Write(gifbuf.Bytes())
out.(http.Flusher).Flush()
}
func haltServer(out http.ResponseWriter, req *http.Request) {
log.Printf("%s Shutdown request received [%s]\n", req.RemoteAddr, req.URL.Path)
out.Header().Set("Content-Type", "text/plain")
fmt.Fprintf(out, "WRP Shutdown")
out.(http.Flusher).Flush()
cancel()
os.Exit(0)
}
func capture(gourl string, out http.ResponseWriter) {
var nodes []*cdp.Node
ctxx := chromedp.FromContext(ctx)
var pngbuf []byte
var gifbuf bytes.Buffer
var loc string
log.Printf("Processing Caputure Request for %s\n", gourl)
// Run ChromeDP Magic
chromedp.Run(ctx,
emulation.SetDeviceMetricsOverride(1024, 768, 1.0, false),
chromedp.Navigate(gourl),
chromedp.Sleep(time.Second*2),
chromedp.CaptureScreenshot(&pngbuf),
chromedp.Location(&loc),
chromedp.Nodes("a", &nodes, chromedp.ByQueryAll))
log.Printf("Landed on: %s, Got %d nodes\n", loc, len(nodes))
// Process Screenshot Image
bytes.NewReader(pngbuf).Seek(0, 0)
img, err := png.Decode(bytes.NewReader(pngbuf))
if err != nil {
log.Printf("Failed to decode screenshot: %s\n", err)
fmt.Fprintf(out, "
Unable to decode page screenshot:
%s
\n", err)
return
}
gifbuf.Reset()
err = gif.Encode(&gifbuf, img, nil)
if err != nil {
log.Printf("Failed to encode GIF: %s\n", err)
fmt.Fprintf(out, "
Unable to encode GIF:
%s
\n", err)
return
}
imgpath := fmt.Sprintf("/img/%04d.gif", rand.Intn(9999))
gifmap[imgpath] = gifbuf
// Process Nodes
base, _ := url.Parse(loc)
fmt.Fprintf(out, "\n\n")
out.(http.Flusher).Flush()
log.Printf("Done with caputure for %s\n", gourl)
}
func main() {
ctx, cancel = chromedp.NewContext(context.Background())
defer cancel()
var addr string
flag.StringVar(&addr, "l", ":8080", "Listen address:port, default :8080")
flag.Parse()
rand.Seed(time.Now().UnixNano())
http.HandleFunc("/", pageServer)
http.HandleFunc("/img/", imgServer)
http.HandleFunc("/favicon.ico", http.NotFound)
http.HandleFunc("/halt", haltServer)
log.Printf("Starting http server on %s\n", addr)
http.ListenAndServe(addr, nil)
}