From 9ad651c72c4aac85d37f1db21ce7350bc00a01e7 Mon Sep 17 00:00:00 2001 From: Antoni Sawicki Date: Thu, 30 May 2019 02:03:17 -0700 Subject: [PATCH] randomized image url --- wrp.go | 34 +++++++++++++++++++++++----------- 1 file changed, 23 insertions(+), 11 deletions(-) diff --git a/wrp.go b/wrp.go index 1f57cc4..b6f9206 100644 --- a/wrp.go +++ b/wrp.go @@ -16,6 +16,7 @@ import ( "image/gif" "image/png" "log" + "math/rand" "net/http" "net/url" "os" @@ -32,7 +33,7 @@ import ( var ( ctx context.Context cancel context.CancelFunc - gifbuf bytes.Buffer + gifmap = make(map[string]bytes.Buffer) ) func pageServer(out http.ResponseWriter, req *http.Request) { @@ -42,9 +43,9 @@ func pageServer(out http.ResponseWriter, req *http.Request) { if len(furl) >= 1 && len(furl[0]) > 4 { gourl = furl[0] } else { - gourl = "https://en.wikipedia.org/wiki/" + gourl = "https://www.bbc.com/news" } - log.Printf("%s Page Reqest for %s URL=%s\n", req.RemoteAddr, req.URL.Path, gourl) + log.Printf("%s Page Reqest for %s [%s]\n", req.RemoteAddr, gourl, req.URL.Path) out.Header().Set("Content-Type", "text/html") fmt.Fprintf(out, "\nWRP %s\n", gourl) fmt.Fprintf(out, "
URL: ", gourl) @@ -56,10 +57,13 @@ func pageServer(out http.ResponseWriter, req *http.Request) { } func imgServer(out http.ResponseWriter, req *http.Request) { - log.Printf("%s Img Reqest for %s\n", req.RemoteAddr, req.URL.Path) + 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) { @@ -74,22 +78,25 @@ func haltServer(out http.ResponseWriter, req *http.Request) { func capture(gourl string, out http.ResponseWriter) { var nodes []*cdp.Node ctxx := chromedp.FromContext(ctx) - var scrcap []byte + var pngbuf []byte + var gifbuf bytes.Buffer var loc string - log.Printf("Caputure Request for %s\n", gourl) + 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(&scrcap), + chromedp.CaptureScreenshot(&pngbuf), chromedp.Location(&loc), chromedp.Nodes("a", &nodes, chromedp.ByQueryAll)) log.Printf("Landed on: %s, Got %d nodes\n", loc, len(nodes)) - img, err := png.Decode(bytes.NewReader(scrcap)) + // Process Screenshot Image + 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) @@ -102,9 +109,13 @@ func capture(gourl string, out http.ResponseWriter) { 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, "\"wrp\"\n\n") + fmt.Fprintf(out, "\"wrp\"\n\n", imgpath) + log.Printf("Image path will be: %s", imgpath) for _, n := range nodes { b, err := dom.GetBoxModel().WithNodeID(n.NodeID).Do(cdp.WithExecutor(ctx, ctxx.Target)) @@ -124,6 +135,7 @@ func capture(gourl string, out http.ResponseWriter) { } fmt.Fprintf(out, "\n") + out.(http.Flusher).Flush() log.Printf("Done with caputure for %s\n", gourl) } @@ -133,9 +145,9 @@ func main() { 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("/wrp.gif", imgServer) + http.HandleFunc("/img/", imgServer) http.HandleFunc("/favicon.ico", http.NotFound) http.HandleFunc("/halt", haltServer) log.Printf("Starting http server on %s\n", addr)