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support unlimited page lenght via height=0

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This commit is contained in:
Antoni Sawicki 2019-11-03 15:01:05 -08:00
parent b058831ec6
commit 6449c64e36
1 changed files with 23 additions and 13 deletions
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36
wrp.go
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@ -15,6 +15,7 @@ import (
"image/gif"
"image/png"
"log"
"math"
"math/rand"
"net/http"
"net/url"
@ -27,12 +28,13 @@ import (
"github.com/chromedp/cdproto/css"
"github.com/chromedp/cdproto/emulation"
"github.com/chromedp/cdproto/page"
"github.com/chromedp/chromedp"
"github.com/ericpauley/go-quantize/quantize"
)
var (
version = "4.4"
version = "4.5"
srv http.Server
ctx context.Context
cancel context.CancelFunc
@ -61,11 +63,9 @@ func (w *wrpReq) parseForm(req *http.Request) {
w.U = fmt.Sprintf("http://www.google.com/search?q=%s", url.QueryEscape(w.U))
}
w.W, _ = strconv.ParseInt(req.FormValue("w"), 10, 64)
if w.W < 10 {
w.W = 1152
}
w.H, _ = strconv.ParseInt(req.FormValue("h"), 10, 64)
if w.H < 10 {
if w.W < 10 && w.H < 10 {
w.W = 1152
w.H = 600
}
w.S, _ = strconv.ParseFloat(req.FormValue("s"), 64)
@ -115,7 +115,6 @@ func pageServer(out http.ResponseWriter, req *http.Request) {
log.Printf("%s Page Request for %s [%+v]\n", req.RemoteAddr, req.URL.Path, req.URL.RawQuery)
var w wrpReq
w.parseForm(req)
if len(w.U) > 4 {
w.capture(req.RemoteAddr, out)
} else {
@ -202,10 +201,7 @@ func (w wrpReq) capture(c string, out http.ResponseWriter) {
err = chromedp.Run(ctx, chromedp.KeyEvent(w.K))
} else {
log.Printf("%s Processing Capture Request for %s\n", c, w.U)
err = chromedp.Run(ctx,
emulation.SetDeviceMetricsOverride(int64(float64(w.W)/w.S), int64(float64(w.H)/w.S), w.S, false),
chromedp.Navigate(w.U),
)
err = chromedp.Run(ctx, chromedp.Navigate(w.U))
}
if err != nil {
if err.Error() == "context canceled" {
@ -220,19 +216,33 @@ func (w wrpReq) capture(c string, out http.ResponseWriter) {
}
var styles []*css.ComputedProperty
var r, g, b int
var h int64
var pngcap []byte
chromedp.Run(ctx,
emulation.SetDeviceMetricsOverride(int64(float64(w.W)/w.S), 10, w.S, false),
chromedp.Sleep(time.Second*2),
chromedp.ComputedStyle("body", &styles, chromedp.ByQuery),
chromedp.Location(&w.U),
chromedp.ComputedStyle("body", &styles, chromedp.ByQuery),
chromedp.ActionFunc(func(ctx context.Context) error {
_, _, s, err := page.GetLayoutMetrics().Do(ctx)
if err == nil {
h = int64(math.Ceil(s.Height))
}
return nil
}),
)
log.Printf("%s Landed on: %s\n", c, w.U)
for _, style := range styles {
if style.Name == "background-color" {
fmt.Sscanf(style.Value, "rgb(%d,%d,%d)", &r, &g, &b)
}
}
log.Printf("%s Landed on: %s, Height: %v\n", c, w.U, h)
w.printPage(out, fmt.Sprintf("#%02X%02X%02X", r, g, b))
var pngcap []byte
if w.H == 0 && h > 0 {
chromedp.Run(ctx, emulation.SetDeviceMetricsOverride(int64(float64(w.W)/w.S), h+30, w.S, false))
} else {
chromedp.Run(ctx, emulation.SetDeviceMetricsOverride(int64(float64(w.W)/w.S), int64(float64(w.H)/w.S), w.S, false))
}
err = chromedp.Run(ctx, chromedp.CaptureScreenshot(&pngcap))
if err != nil {
log.Printf("%s Failed to capture screenshot: %s\n", c, err)