mirror of
https://github.com/tenox7/wrp.git
synced 2024-11-21 04:31:25 +00:00
294 lines
8.7 KiB
Go
294 lines
8.7 KiB
Go
// WRP ISMAP / ChromeDP routines
|
|
package main
|
|
|
|
import (
|
|
"bytes"
|
|
"context"
|
|
"fmt"
|
|
"image"
|
|
"image/gif"
|
|
"image/jpeg"
|
|
"image/png"
|
|
"io"
|
|
"log"
|
|
"math"
|
|
"net/http"
|
|
"strconv"
|
|
"strings"
|
|
"time"
|
|
|
|
"github.com/chromedp/cdproto/css"
|
|
"github.com/chromedp/cdproto/emulation"
|
|
"github.com/chromedp/cdproto/input"
|
|
"github.com/chromedp/cdproto/page"
|
|
"github.com/chromedp/chromedp"
|
|
"github.com/lithammer/shortuuid/v4"
|
|
)
|
|
|
|
func chromedpStart() (context.CancelFunc, context.CancelFunc) {
|
|
opts := append(chromedp.DefaultExecAllocatorOptions[:],
|
|
chromedp.Flag("headless", *headless),
|
|
chromedp.Flag("hide-scrollbars", false),
|
|
chromedp.Flag("enable-automation", false),
|
|
chromedp.Flag("disable-blink-features", "AutomationControlled"),
|
|
)
|
|
if *userAgent != "" {
|
|
opts = append(opts, chromedp.UserAgent(*userAgent))
|
|
}
|
|
actx, acncl = chromedp.NewExecAllocator(context.Background(), opts...)
|
|
ctx, cncl = chromedp.NewContext(actx)
|
|
return cncl, acncl
|
|
}
|
|
|
|
// Determine what action to take
|
|
func (rq *wrpReq) action() chromedp.Action {
|
|
// Mouse Click
|
|
if rq.mouseX > 0 && rq.mouseY > 0 {
|
|
log.Printf("%s Mouse Click %d,%d\n", rq.r.RemoteAddr, rq.mouseX, rq.mouseY)
|
|
return chromedp.MouseClickXY(float64(rq.mouseX)/float64(rq.zoom), float64(rq.mouseY)/float64(rq.zoom))
|
|
}
|
|
// Buttons
|
|
if len(rq.buttons) > 0 {
|
|
log.Printf("%s Button %v\n", rq.r.RemoteAddr, rq.buttons)
|
|
switch rq.buttons {
|
|
case "Bk":
|
|
return chromedp.NavigateBack()
|
|
case "St":
|
|
return chromedp.Stop()
|
|
case "Re":
|
|
return chromedp.Reload()
|
|
case "Bs":
|
|
return chromedp.KeyEvent("\b")
|
|
case "Rt":
|
|
return chromedp.KeyEvent("\r")
|
|
case "<":
|
|
return chromedp.KeyEvent("\u0302")
|
|
case "^":
|
|
return chromedp.KeyEvent("\u0304")
|
|
case "v":
|
|
return chromedp.KeyEvent("\u0301")
|
|
case ">":
|
|
return chromedp.KeyEvent("\u0303")
|
|
case "Up":
|
|
return chromedp.KeyEvent("\u0308")
|
|
case "Dn":
|
|
return chromedp.KeyEvent("\u0307")
|
|
case "All": // Select all
|
|
return chromedp.KeyEvent("a", chromedp.KeyModifiers(input.ModifierCtrl))
|
|
}
|
|
}
|
|
// Keys
|
|
if len(rq.keys) > 0 {
|
|
log.Printf("%s Sending Keys: %#v\n", rq.r.RemoteAddr, rq.keys)
|
|
return chromedp.KeyEvent(rq.keys)
|
|
}
|
|
// Navigate to URL
|
|
log.Printf("%s Processing Navigate Request for %s\n", rq.r.RemoteAddr, rq.url)
|
|
return chromedp.Navigate(rq.url)
|
|
}
|
|
|
|
// Navigate to the desired URL.
|
|
func (rq *wrpReq) navigate() {
|
|
ctxErr(chromedp.Run(ctx, rq.action()), rq.w)
|
|
}
|
|
|
|
// Handle context errors
|
|
func ctxErr(err error, w io.Writer) {
|
|
// TODO: callers should have retry logic, perhaps create another function
|
|
// that takes ...chromedp.Action and retries with give up
|
|
if err == nil {
|
|
return
|
|
}
|
|
log.Printf("Context error: %s", err)
|
|
fmt.Fprintf(w, "Context error: %s<BR>\n", err)
|
|
if err.Error() != "context canceled" {
|
|
return
|
|
}
|
|
ctx, cncl = chromedp.NewContext(actx)
|
|
log.Printf("Created new context, try again")
|
|
fmt.Fprintln(w, "Created new context, try again")
|
|
}
|
|
|
|
// https://github.com/chromedp/chromedp/issues/979
|
|
func chromedpCaptureScreenshot(res *[]byte, h int64) chromedp.Action {
|
|
if res == nil {
|
|
panic("res cannot be nil") // TODO: do not panic here, return error
|
|
}
|
|
if h == 0 {
|
|
return chromedp.CaptureScreenshot(res)
|
|
}
|
|
|
|
return chromedp.ActionFunc(func(ctx context.Context) error {
|
|
var err error
|
|
*res, err = page.CaptureScreenshot().Do(ctx)
|
|
return err
|
|
})
|
|
}
|
|
|
|
// Capture Screenshot using CDP
|
|
func (rq *wrpReq) captureScreenshot() {
|
|
var styles []*css.ComputedStyleProperty
|
|
var r, g, b int
|
|
var bgColorSet bool
|
|
var h int64
|
|
var pngCap []byte
|
|
chromedp.Run(ctx,
|
|
emulation.SetDeviceMetricsOverride(int64(float64(rq.width)/rq.zoom), 10, rq.zoom, false),
|
|
chromedp.Location(&rq.url),
|
|
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, Height: %v\n", rq.r.RemoteAddr, rq.url, h)
|
|
for _, style := range styles {
|
|
if style.Name != "background-color" {
|
|
continue
|
|
}
|
|
fmt.Sscanf(style.Value, "rgb(%d,%d,%d)", &r, &g, &b)
|
|
bgColorSet = true
|
|
break
|
|
}
|
|
if !bgColorSet {
|
|
r = 255
|
|
g = 255
|
|
b = 255
|
|
}
|
|
height := int64(float64(rq.height) / rq.zoom)
|
|
if rq.height == 0 && h > 0 {
|
|
height = h + 30
|
|
}
|
|
chromedp.Run(
|
|
ctx, emulation.SetDeviceMetricsOverride(int64(float64(rq.width)/rq.zoom), height, rq.zoom, false),
|
|
chromedp.Sleep(*delay), // TODO(tenox): find a better way to determine if page is rendered
|
|
)
|
|
// Capture screenshot...
|
|
ctxErr(chromedp.Run(ctx, chromedpCaptureScreenshot(&pngCap, rq.height)), rq.w)
|
|
seq := shortuuid.New()
|
|
imgPath := fmt.Sprintf("/img/%s.%s", seq, rq.imgType)
|
|
mapPath := fmt.Sprintf("/map/%s.map", seq)
|
|
ismap[mapPath] = *rq
|
|
var sSize string
|
|
var iW, iH int
|
|
switch rq.imgType {
|
|
case "png":
|
|
pngBuf := bytes.NewBuffer(pngCap)
|
|
img[imgPath] = *pngBuf
|
|
cfg, _, _ := image.DecodeConfig(pngBuf)
|
|
sSize = fmt.Sprintf("%.0f KB", float32(len(pngBuf.Bytes()))/1024.0)
|
|
iW = cfg.Width
|
|
iH = cfg.Height
|
|
log.Printf("%s Got PNG image: %s, Size: %s, Res: %dx%d\n", rq.r.RemoteAddr, imgPath, sSize, iW, iH)
|
|
case "gif":
|
|
i, err := png.Decode(bytes.NewReader(pngCap))
|
|
if err != nil {
|
|
log.Printf("%s Failed to decode PNG screenshot: %s\n", rq.r.RemoteAddr, err)
|
|
fmt.Fprintf(rq.w, "<BR>Unable to decode page PNG screenshot:<BR>%s<BR>\n", err)
|
|
return
|
|
}
|
|
st := time.Now()
|
|
var gifBuf bytes.Buffer
|
|
err = gif.Encode(&gifBuf, gifPalette(i, rq.nColors), &gif.Options{})
|
|
if err != nil {
|
|
log.Printf("%s Failed to encode GIF: %s\n", rq.r.RemoteAddr, err)
|
|
fmt.Fprintf(rq.w, "<BR>Unable to encode GIF:<BR>%s<BR>\n", err)
|
|
return
|
|
}
|
|
img[imgPath] = gifBuf
|
|
sSize = fmt.Sprintf("%.0f KB", float32(len(gifBuf.Bytes()))/1024.0)
|
|
iW = i.Bounds().Max.X
|
|
iH = i.Bounds().Max.Y
|
|
log.Printf("%s Encoded GIF image: %s, Size: %s, Colors: %d, Res: %dx%d, Time: %vms\n", rq.r.RemoteAddr, imgPath, sSize, rq.nColors, iW, iH, time.Since(st).Milliseconds())
|
|
case "jpg":
|
|
i, err := png.Decode(bytes.NewReader(pngCap))
|
|
if err != nil {
|
|
log.Printf("%s Failed to decode PNG screenshot: %s\n", rq.r.RemoteAddr, err)
|
|
fmt.Fprintf(rq.w, "<BR>Unable to decode page PNG screenshot:<BR>%s<BR>\n", err)
|
|
return
|
|
}
|
|
st := time.Now()
|
|
var jpgBuf bytes.Buffer
|
|
err = jpeg.Encode(&jpgBuf, i, &jpeg.Options{Quality: int(rq.jQual)})
|
|
if err != nil {
|
|
log.Printf("%s Failed to encode JPG: %s\n", rq.r.RemoteAddr, err)
|
|
fmt.Fprintf(rq.w, "<BR>Unable to encode JPG:<BR>%s<BR>\n", err)
|
|
return
|
|
}
|
|
img[imgPath] = jpgBuf
|
|
sSize = fmt.Sprintf("%.0f KB", float32(len(jpgBuf.Bytes()))/1024.0)
|
|
iW = i.Bounds().Max.X
|
|
iH = i.Bounds().Max.Y
|
|
log.Printf("%s Encoded JPG image: %s, Size: %s, Quality: %d, Res: %dx%d, Time: %vms\n", rq.r.RemoteAddr, imgPath, sSize, *defJpgQual, iW, iH, time.Since(st).Milliseconds())
|
|
}
|
|
rq.printUI(uiParams{
|
|
bgColor: fmt.Sprintf("#%02X%02X%02X", r, g, b),
|
|
pageHeight: fmt.Sprintf("%d PX", h),
|
|
imgSize: sSize,
|
|
imgURL: imgPath,
|
|
mapURL: mapPath,
|
|
imgWidth: iW,
|
|
imgHeight: iH,
|
|
})
|
|
log.Printf("%s Done with capture for %s\n", rq.r.RemoteAddr, rq.url)
|
|
}
|
|
|
|
func mapServer(w http.ResponseWriter, r *http.Request) {
|
|
log.Printf("%s ISMAP Request for %s [%+v]\n", r.RemoteAddr, r.URL.Path, r.URL.RawQuery)
|
|
rq, ok := ismap[r.URL.Path]
|
|
rq.r = r
|
|
rq.w = w
|
|
if !ok {
|
|
fmt.Fprintf(w, "Unable to find map %s\n", r.URL.Path)
|
|
log.Printf("Unable to find map %s\n", r.URL.Path)
|
|
return
|
|
}
|
|
if !*noDel {
|
|
defer delete(ismap, r.URL.Path)
|
|
}
|
|
n, err := fmt.Sscanf(r.URL.RawQuery, "%d,%d", &rq.mouseX, &rq.mouseY)
|
|
if err != nil || n != 2 {
|
|
fmt.Fprintf(w, "n=%d, err=%s\n", n, err)
|
|
log.Printf("%s ISMAP n=%d, err=%s\n", r.RemoteAddr, n, err)
|
|
return
|
|
}
|
|
log.Printf("%s WrpReq from ISMAP: %+v\n", r.RemoteAddr, rq)
|
|
if len(rq.url) < 4 {
|
|
rq.printUI(uiParams{bgColor: "#FFFFFF"})
|
|
return
|
|
}
|
|
rq.navigate() // TODO: if error from navigate do not capture
|
|
rq.captureScreenshot()
|
|
}
|
|
|
|
// TODO: merge this with html mode IMGZ
|
|
func imgServerMap(w http.ResponseWriter, r *http.Request) {
|
|
log.Printf("%s IMG Request for %s\n", r.RemoteAddr, r.URL.Path)
|
|
imgBuf, ok := img[r.URL.Path]
|
|
if !ok || imgBuf.Bytes() == nil {
|
|
fmt.Fprintf(w, "Unable to find image %s\n", r.URL.Path)
|
|
log.Printf("%s Unable to find image %s\n", r.RemoteAddr, r.URL.Path)
|
|
return
|
|
}
|
|
if !*noDel {
|
|
defer delete(img, r.URL.Path)
|
|
}
|
|
switch {
|
|
case strings.HasSuffix(r.URL.Path, ".gif"):
|
|
w.Header().Set("Content-Type", "image/gif")
|
|
case strings.HasSuffix(r.URL.Path, ".png"):
|
|
w.Header().Set("Content-Type", "image/png")
|
|
case strings.HasSuffix(r.URL.Path, ".jpg"):
|
|
w.Header().Set("Content-Type", "image/jpeg")
|
|
}
|
|
w.Header().Set("Content-Length", strconv.Itoa(len(imgBuf.Bytes())))
|
|
w.Header().Set("Cache-Control", "max-age=0")
|
|
w.Header().Set("Expires", "-1")
|
|
w.Header().Set("Pragma", "no-cache")
|
|
w.Write(imgBuf.Bytes())
|
|
w.(http.Flusher).Flush()
|
|
}
|