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Code Issues Projects Releases Wiki Activity

add simple page scrolling

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This commit is contained in:
Antoni Sawicki 2019-05-31 00:19:10 -07:00
parent ebe19912e6
commit cb87a83d26
1 changed files with 14 additions and 8 deletions
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22
wrp.go
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@ -24,6 +24,7 @@ import (
"time"
"github.com/chromedp/cdproto/emulation"
"github.com/chromedp/cdproto/runtime"
"github.com/chromedp/cdproto/cdp"
"github.com/chromedp/cdproto/dom"
@ -39,6 +40,7 @@ var (
func pageServer(out http.ResponseWriter, r *http.Request) {
r.ParseForm()
u := r.FormValue("url")
y, _ := strconv.ParseInt(r.FormValue("y"), 10, 64)
w, _ := strconv.ParseInt(r.FormValue("w"), 10, 64)
if w < 10 {
w = 1024
@ -56,12 +58,13 @@ func pageServer(out http.ResponseWriter, r *http.Request) {
fmt.Fprintf(out, "<HTML>\n<HEAD><TITLE>WRP %s</TITLE>\n<BODY BGCOLOR=\"#F0F0F0\">", u)
fmt.Fprintf(out, "<FORM ACTION=\"/\">URL: <INPUT TYPE=\"TEXT\" NAME=\"url\" VALUE=\"%s\" SIZE=\"40\">", u)
fmt.Fprintf(out, "<INPUT TYPE=\"SUBMIT\" VALUE=\"Go\"><P>\n")
fmt.Fprintf(out, "Width:<INPUT TYPE=\"TEXT\" NAME=\"w\" VALUE=\"%d\" SIZE=\"5\"> \n", w)
fmt.Fprintf(out, "Height:<INPUT TYPE=\"TEXT\" NAME=\"h\" VALUE=\"%d\" SIZE=\"5\"> \n", h)
fmt.Fprintf(out, "Scale:<INPUT TYPE=\"TEXT\" NAME=\"s\" VALUE=\"%1.2f\" SIZE=\"4\"> \n", s)
fmt.Fprintf(out, "Width:<INPUT TYPE=\"TEXT\" NAME=\"w\" VALUE=\"%d\" SIZE=\"4\"> \n", w)
fmt.Fprintf(out, "Height:<INPUT TYPE=\"TEXT\" NAME=\"h\" VALUE=\"%d\" SIZE=\"4\"> \n", h)
fmt.Fprintf(out, "Scale:<INPUT TYPE=\"TEXT\" NAME=\"s\" VALUE=\"%1.2f\" SIZE=\"3\"> \n", s)
fmt.Fprintf(out, "Scroll:<INPUT TYPE=\"TEXT\" NAME=\"y\" VALUE=\"%d\" SIZE=\"4\"> \n", y)
fmt.Fprintf(out, "</FORM><P>")
if len(u) > 4 {
capture(u, w, h, s, out)
capture(u, w, h, s, y, out)
} else {
fmt.Fprintf(out, "No URL specified")
}
@ -87,25 +90,28 @@ func haltServer(out http.ResponseWriter, req *http.Request) {
os.Exit(0)
}
func capture(gourl string, w int64, h int64, s float64, out http.ResponseWriter) {
func capture(gourl string, w int64, h int64, s float64, y int64, out http.ResponseWriter) {
var nodes []*cdp.Node
ctxx := chromedp.FromContext(ctx)
var pngbuf []byte
var gifbuf bytes.Buffer
var loc string
var res *runtime.RemoteObject
log.Printf("Processing Caputure Request for %s\n", gourl)
// Run ChromeDP Magic
scrl := fmt.Sprintf("window.scrollTo(0, %d);", y)
chromedp.Run(ctx,
emulation.SetDeviceMetricsOverride(w, h, s, false),
chromedp.Navigate(gourl),
chromedp.Sleep(time.Second*2),
chromedp.Evaluate(scrl, &res),
chromedp.Sleep(time.Second*1),
chromedp.CaptureScreenshot(&pngbuf),
chromedp.Location(&loc),
chromedp.Nodes("a", &nodes, chromedp.ByQueryAll))
log.Printf("Landed on: %s, Got %d nodes\n", loc, len(nodes))
log.Printf("Landed on: %s, Nodes: %d\n", loc, len(nodes))
// Process Screenshot Image
bytes.NewReader(pngbuf).Seek(0, 0)
@ -139,7 +145,7 @@ func capture(gourl string, w int64, h int64, s float64, out http.ResponseWriter)
if err != nil {
continue
}
target := fmt.Sprintf("/?url=%s&w=%d&h=%d&s=%1.2f", tgt, w, h, s)
target := fmt.Sprintf("/?url=%s&w=%d&h=%d&s=%1.2f&y=%d", tgt, w, h, s, y)
if len(b.Content) > 6 && len(target) > 7 {
fmt.Fprintf(out, "<AREA SHAPE=\"RECT\" COORDS=\"%.f,%.f,%.f,%.f\" ALT=\"%s\" TITLE=\"%s\" HREF=\"%s\">\n",