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Merge branch 'clicky'

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This commit is contained in:
Antoni Sawicki 2019-07-12 01:54:59 -07:00
commit 9557f172ed
1 changed files with 136 additions and 160 deletions
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296
wrp.go
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@ -23,96 +23,122 @@ import (
"time" "time"
"github.com/chromedp/cdproto/emulation" "github.com/chromedp/cdproto/emulation"
"github.com/chromedp/cdproto/runtime"
"github.com/chromedp/cdproto/cdp"
"github.com/chromedp/cdproto/dom"
"github.com/chromedp/chromedp" "github.com/chromedp/chromedp"
"github.com/ericpauley/go-quantize/quantize" "github.com/ericpauley/go-quantize/quantize"
) )
// Ismap for server side processing
type Ismap struct {
xmin int64
ymin int64
xmax int64
ymax int64
url string
}
var ( var (
version = "3.0" version = "4.0"
srv http.Server srv http.Server
ctx context.Context ctx context.Context
cancel context.CancelFunc cancel context.CancelFunc
gifmap = make(map[string]bytes.Buffer) gifmap = make(map[string]bytes.Buffer)
ismap = make(map[string][]Ismap) ismap = make(map[string]wrpReq)
) )
func pageServer(out http.ResponseWriter, req *http.Request) { type wrpReq struct {
U string // url
W int64 // width
H int64 // height
S float64 // scale
C int64 // #colors
X int64 // mouseX
Y int64 // mouseY
K string // keys to send
B bool // history back
}
func (w *wrpReq) parseForm(req *http.Request) {
req.ParseForm() req.ParseForm()
u := req.FormValue("url") w.U = req.FormValue("url")
var istr string if len(w.U) > 1 && !strings.HasPrefix(w.U, "http") {
var ion string w.U = fmt.Sprintf("http://www.google.com/search?q=%s", url.QueryEscape(w.U))
var i bool
if req.FormValue("i") == "on" {
istr = "CHECKED"
i = true
ion = "&i=on"
} else {
istr = ""
i = false
} }
p, _ := strconv.ParseInt(req.FormValue("p"), 10, 64) w.W, _ = strconv.ParseInt(req.FormValue("w"), 10, 64)
if req.FormValue("pg") == "Dn" { if w.W < 10 {
p++ w.W = 1152
} else if req.FormValue("pg") == "Up" {
p--
} else {
p = 0
} }
w, _ := strconv.ParseInt(req.FormValue("w"), 10, 64) w.H, _ = strconv.ParseInt(req.FormValue("h"), 10, 64)
if w < 10 { if w.H < 10 {
w = 1024 w.H = 600
} }
h, _ := strconv.ParseInt(req.FormValue("h"), 10, 64) w.S, _ = strconv.ParseFloat(req.FormValue("s"), 64)
if h < 10 { if w.S < 0.1 {
h = 768 w.S = 1.0
} }
s, _ := strconv.ParseFloat(req.FormValue("s"), 64) w.C, _ = strconv.ParseInt(req.FormValue("c"), 10, 64)
if s < 0.1 { if w.C < 2 || w.C > 256 {
s = 1.0 w.C = 256
} }
c, _ := strconv.ParseInt(req.FormValue("c"), 10, 64) w.K = req.FormValue("k")
if c < 2 || c > 256 { if w.K == "\\b" {
c = 256 w.K = "\b"
} else if w.K == "\\r" {
w.K = "\r"
} }
log.Printf("%s Page Request for url=\"%s\" [%s]\n", req.RemoteAddr, u, req.URL.Path) if req.FormValue("hist") == "Back" {
w.B = true
}
log.Printf("WrpReq from Form: %+v\n", w)
}
func (w wrpReq) printPage(out http.ResponseWriter) {
out.Header().Set("Content-Type", "text/html") out.Header().Set("Content-Type", "text/html")
fmt.Fprintf(out, "<!-- Web Rendering Proxy Version %s -->\n", version) fmt.Fprintf(out, "<!-- Web Rendering Proxy Version %s -->\n", version)
fmt.Fprintf(out, "<HTML>\n<HEAD><TITLE>WRP %s</TITLE></HEAD>\n<BODY BGCOLOR=\"#F0F0F0\">\n", u) fmt.Fprintf(out, "<HTML>\n<HEAD><TITLE>WRP %s</TITLE></HEAD>\n<BODY BGCOLOR=\"#F0F0F0\">\n", w.U)
fmt.Fprintf(out, "<FORM ACTION=\"/\"><INPUT TYPE=\"TEXT\" NAME=\"url\" VALUE=\"%s\" SIZE=\"20\">", u) fmt.Fprintf(out, "<FORM ACTION=\"/\"><INPUT TYPE=\"SUBMIT\" NAME=\"hist\" VALUE=\"Back\">\n")
fmt.Fprintf(out, "<INPUT TYPE=\"TEXT\" NAME=\"url\" VALUE=\"%s\" SIZE=\"40\">", w.U)
fmt.Fprintf(out, "<INPUT TYPE=\"SUBMIT\" VALUE=\"Go\"> \n") fmt.Fprintf(out, "<INPUT TYPE=\"SUBMIT\" VALUE=\"Go\"> \n")
fmt.Fprintf(out, "<INPUT TYPE=\"SUBMIT\" NAME=\"pg\" VALUE=\"Up\"> \n") fmt.Fprintf(out, "W <INPUT TYPE=\"TEXT\" NAME=\"w\" VALUE=\"%d\" SIZE=\"4\"> \n", w.W)
fmt.Fprintf(out, "<INPUT TYPE=\"TEXT\" NAME=\"p\" VALUE=\"%d\" SIZE=\"2\"> \n", p) fmt.Fprintf(out, "H <INPUT TYPE=\"TEXT\" NAME=\"h\" VALUE=\"%d\" SIZE=\"4\"> \n", w.H)
fmt.Fprintf(out, "<INPUT TYPE=\"SUBMIT\" NAME=\"pg\" VALUE=\"Dn\"> \n") fmt.Fprintf(out, "S <INPUT TYPE=\"TEXT\" NAME=\"s\" VALUE=\"%1.2f\" SIZE=\"3\"> \n", w.S)
fmt.Fprintf(out, "I <INPUT TYPE=\"CHECKBOX\" NAME=\"i\" %s> \n", istr) fmt.Fprintf(out, "C <INPUT TYPE=\"TEXT\" NAME=\"c\" VALUE=\"%d\" SIZE=\"3\"> \n", w.C)
fmt.Fprintf(out, "W <INPUT TYPE=\"TEXT\" NAME=\"w\" VALUE=\"%d\" SIZE=\"4\"> \n", w) fmt.Fprintf(out, "K <INPUT TYPE=\"TEXT\" NAME=\"k\" VALUE=\"\" SIZE=\"8\"> \n")
fmt.Fprintf(out, "H <INPUT TYPE=\"TEXT\" NAME=\"h\" VALUE=\"%d\" SIZE=\"4\"> \n", h)
fmt.Fprintf(out, "S <INPUT TYPE=\"TEXT\" NAME=\"s\" VALUE=\"%1.2f\" SIZE=\"3\"> \n", s)
fmt.Fprintf(out, "C <INPUT TYPE=\"TEXT\" NAME=\"c\" VALUE=\"%d\" SIZE=\"3\"> \n", c)
fmt.Fprintf(out, "</FORM><BR>\n") fmt.Fprintf(out, "</FORM><BR>\n")
if len(u) > 1 { }
if strings.HasPrefix(u, "http") {
capture(u, w, h, s, int(c), p, i, req.RemoteAddr, out) func (w wrpReq) printFooter(out http.ResponseWriter) {
} else { fmt.Fprintf(out, "\n<P><A HREF=\"/?url=https://github.com/tenox7/wrp/&w=%d&h=%d&s=%1.2f&c=%d\">"+
capture(fmt.Sprintf("http://www.google.com/search?q=%s", url.QueryEscape(u)), w, h, s, int(c), p, i, req.RemoteAddr, out) "Web Rendering Proxy Version %s</A> | <A HREF=\"/shutdown/\">Shutdown WRP</A></BODY>\n</HTML>\n", w.W, w.H, w.S, w.C, version)
} }
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 { } else {
fmt.Fprintf(out, "No URL or search query specified") w.printPage(out)
w.printFooter(out)
}
}
func mapServer(out http.ResponseWriter, req *http.Request) {
log.Printf("%s ISMAP Request for %s [%+v]\n", req.RemoteAddr, req.URL.Path, req.URL.RawQuery)
w, ok := ismap[req.URL.Path]
if !ok {
fmt.Fprintf(out, "Unable to find map %s\n", req.URL.Path)
log.Printf("Unable to find map %s\n", req.URL.Path)
return
}
defer delete(ismap, req.URL.Path)
n, err := fmt.Sscanf(req.URL.RawQuery, "%d,%d", &w.X, &w.Y)
if err != nil || n != 2 {
fmt.Fprintf(out, "n=%d, err=%s\n", n, err)
log.Printf("%s ISMAP n=%d, err=%s\n", req.RemoteAddr, n, err)
return
}
log.Printf("%s WrpReq from ISMAP: %+v\n", req.RemoteAddr, w)
if len(w.U) > 4 {
w.capture(req.RemoteAddr, out)
} else {
w.printPage(out)
w.printFooter(out)
} }
fmt.Fprintf(out, "\n<P><A HREF=\"/?url=https://github.com/tenox7/wrp/&w=%d&h=%d&s=%1.2f&c=%d%s\">Web Rendering Proxy Version %s</A> | <A HREF=\"/shutdown/\">Shutdown WRP</A></BODY>\n</HTML>\n", w, h, s, c, ion, version)
} }
func imgServer(out http.ResponseWriter, req *http.Request) { func imgServer(out http.ResponseWriter, req *http.Request) {
@ -130,55 +156,33 @@ func imgServer(out http.ResponseWriter, req *http.Request) {
out.(http.Flusher).Flush() out.(http.Flusher).Flush()
} }
func mapServer(out http.ResponseWriter, req *http.Request) { func (w wrpReq) capture(c string, out http.ResponseWriter) {
log.Printf("%s ISMAP Request for %s [%+v]\n", req.RemoteAddr, req.URL.Path, req.URL.RawQuery)
var loc string
var x, y int64
n, err := fmt.Sscanf(req.URL.RawQuery, "%d,%d", &x, &y)
if err != nil || n != 2 {
fmt.Fprintf(out, "n=%d, err=%s\n", n, err)
log.Printf("%s ISMAP n=%d, err=%s\n", req.RemoteAddr, n, err)
return
}
is, ok := ismap[req.URL.Path]
if !ok || is == nil {
fmt.Fprintf(out, "Unable to find map %s\n", req.URL.Path)
log.Printf("Unable to find map %s\n", req.URL.Path)
return
}
defer delete(ismap, req.URL.Path)
for _, i := range is {
if x >= i.xmin && x <= i.xmax && y >= i.ymin && y <= i.ymax {
loc = i.url
}
}
if len(loc) < 1 {
loc = is[0].url
}
log.Printf("%s ISMAP Redirect to: http://%s%s\n", req.RemoteAddr, req.Context().Value(http.LocalAddrContextKey), loc)
http.Redirect(out, req, fmt.Sprintf("http://%s%s", req.Context().Value(http.LocalAddrContextKey), loc), 301)
}
func capture(gourl string, w int64, h int64, s float64, co int, p int64, i bool, c string, out http.ResponseWriter) {
var nodes []*cdp.Node
ctxx := chromedp.FromContext(ctx)
var pngbuf []byte var pngbuf []byte
var gifbuf bytes.Buffer var gifbuf bytes.Buffer
var loc string var err error
var res *runtime.RemoteObject
is := make([]Ismap, 0)
var ion string
log.Printf("%s Processing Capture Request for %s\n", c, gourl) if w.X > 0 && w.Y > 0 {
log.Printf("%s Mouse Click %d,%d\n", c, w.X, w.Y)
// Run ChromeDP Magic chromedp.Run(ctx,
err := chromedp.Run(ctx, chromedp.MouseClickXY(int64(float64(w.X)/w.S), int64(float64(w.Y)/w.S)),
emulation.SetDeviceMetricsOverride(int64(float64(w)/s), int64(float64(h)/s), s, false), )
chromedp.Navigate(gourl), } else if w.B {
chromedp.Evaluate(fmt.Sprintf("window.scrollTo(0, %d);", p*int64(float64(h)*float64(0.9))), &res), log.Printf("%s History Back\n", c)
chromedp.Sleep(time.Second*1), chromedp.Run(ctx,
chromedp.CaptureScreenshot(&pngbuf), chromedp.NavigateBack(),
chromedp.Location(&loc)) )
} else if len(w.K) > 0 {
log.Printf("%s Sending Keys: %#v\n", c, w.K)
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),
)
}
if err != nil { if err != nil {
if err.Error() == "context canceled" { if err.Error() == "context canceled" {
@ -192,9 +196,20 @@ func capture(gourl string, w int64, h int64, s float64, co int, p int64, i bool,
return return
} }
log.Printf("%s Landed on: %s, Nodes: %d\n", c, loc, len(nodes)) chromedp.Run(
ctx, chromedp.Sleep(time.Second*3),
chromedp.Location(&w.U),
)
log.Printf("%s Landed on: %s\n", c, w.U)
w.printPage(out)
// Process Screenshot Image // Process Screenshot Image
err = chromedp.Run(ctx, chromedp.CaptureScreenshot(&pngbuf))
if err != nil {
log.Printf("%s Failed to capture screenshot: %s\n", c, err)
fmt.Fprintf(out, "<BR>Unable to capture screenshot:<BR>%s<BR>\n", err)
return
}
bytes.NewReader(pngbuf).Seek(0, 0) bytes.NewReader(pngbuf).Seek(0, 0)
img, err := png.Decode(bytes.NewReader(pngbuf)) img, err := png.Decode(bytes.NewReader(pngbuf))
if err != nil { if err != nil {
@ -203,63 +218,23 @@ func capture(gourl string, w int64, h int64, s float64, co int, p int64, i bool,
return return
} }
gifbuf.Reset() gifbuf.Reset()
err = gif.Encode(&gifbuf, img, &gif.Options{NumColors: co, Quantizer: quantize.MedianCutQuantizer{}}) err = gif.Encode(&gifbuf, img, &gif.Options{NumColors: int(w.C), Quantizer: quantize.MedianCutQuantizer{}})
if err != nil { if err != nil {
log.Printf("%s Failed to encode GIF: %s\n", c, err) log.Printf("%s Failed to encode GIF: %s\n", c, err)
fmt.Fprintf(out, "<BR>Unable to encode GIF:<BR>%s<BR>\n", err) fmt.Fprintf(out, "<BR>Unable to encode GIF:<BR>%s<BR>\n", err)
return return
} }
// Compose map and gif
seq := rand.Intn(9999) seq := rand.Intn(9999)
imgpath := fmt.Sprintf("/img/%04d.gif", seq) imgpath := fmt.Sprintf("/img/%04d.gif", seq)
mappath := fmt.Sprintf("/map/%04d.map", seq) mappath := fmt.Sprintf("/map/%04d.map", seq)
log.Printf("%s Encoded GIF image: %s, Size: %dKB, Colors: %d\n", c, imgpath, len(gifbuf.Bytes())/1024, co)
gifmap[imgpath] = gifbuf gifmap[imgpath] = gifbuf
ismap[mappath] = w
// Process Nodes log.Printf("%s Encoded GIF image: %s, Size: %dKB, Colors: %d\n", c, imgpath, len(gifbuf.Bytes())/1024, w.C)
tctx, cancel := context.WithTimeout(ctx, time.Second*2) // a context with timeout is needed for pages without nodes fmt.Fprintf(out, "<A HREF=\"%s\"><IMG SRC=\"%s\" ALT=\"wrp\" BORDER=\"0\" ISMAP></A>", mappath, imgpath)
defer cancel() w.printFooter(out)
chromedp.Run(tctx, chromedp.Nodes("a", &nodes, chromedp.ByQueryAll)) log.Printf("%s Done with caputure for %s\n", c, w.U)
base, _ := url.Parse(loc)
if i {
fmt.Fprintf(out, "<A HREF=\"%s\"><IMG SRC=\"%s\" ALT=\"wrp\" BORDER=\"0\" ISMAP></A>", mappath, imgpath)
is = append(is, Ismap{xmin: -1, xmax: -1, ymin: -1, ymax: -1, url: fmt.Sprintf("/?url=%s&w=%d&h=%d&s=%1.2f&c=%d&i=on", loc, w, h, s, co)})
ion = "&i=on"
} else {
fmt.Fprintf(out, "<IMG SRC=\"%s\" ALT=\"wrp\" BORDER=\"0\" USEMAP=\"#map\">\n<MAP NAME=\"map\">\n", imgpath)
}
for _, n := range nodes {
b, err := dom.GetBoxModel().WithNodeID(n.NodeID).Do(cdp.WithExecutor(ctx, ctxx.Target))
if err != nil {
continue
}
tgt, err := base.Parse(n.AttributeValue("href"))
if err != nil {
continue
}
target := fmt.Sprintf("/?url=%s&w=%d&h=%d&s=%1.2f&c=%d%s", tgt, w, h, s, co, ion) // no page# here
if len(b.Padding) > 6 && len(target) > 7 {
if i {
is = append(is, Ismap{
xmin: int64(b.Padding[0] * s), ymin: int64(b.Padding[1] * s),
xmax: int64(b.Padding[4] * s), ymax: int64(b.Padding[5] * s),
url: target})
} else {
fmt.Fprintf(out, "<AREA SHAPE=\"RECT\" COORDS=\"%.f,%.f,%.f,%.f\" ALT=\"%s\" TITLE=\"%s\" HREF=\"%s\">\n",
b.Padding[0]*s, b.Padding[1]*s, b.Padding[4]*s, b.Padding[5]*s, n.AttributeValue("href"), n.AttributeValue("href"), target)
}
}
}
if i {
log.Printf("%s Encoded ISMAP %s\n", c, mappath)
} else {
fmt.Fprintf(out, "</MAP>\n")
}
ismap[mappath] = is
out.(http.Flusher).Flush()
log.Printf("%s Done with caputure for %s\n", c, gourl)
} }
func haltServer(out http.ResponseWriter, req *http.Request) { func haltServer(out http.ResponseWriter, req *http.Request) {
@ -283,6 +258,7 @@ func main() {
} }
opts := append(chromedp.DefaultExecAllocatorOptions[:], opts := append(chromedp.DefaultExecAllocatorOptions[:],
chromedp.Flag("headless", headless), chromedp.Flag("headless", headless),
chromedp.Flag("hide-scrollbars", false),
) )
actx, cancel := chromedp.NewExecAllocator(context.Background(), opts...) actx, cancel := chromedp.NewExecAllocator(context.Background(), opts...)
defer cancel() defer cancel()
@ -294,8 +270,8 @@ func main() {
defer cancel() defer cancel()
rand.Seed(time.Now().UnixNano()) rand.Seed(time.Now().UnixNano())
http.HandleFunc("/", pageServer) http.HandleFunc("/", pageServer)
http.HandleFunc("/img/", imgServer)
http.HandleFunc("/map/", mapServer) http.HandleFunc("/map/", mapServer)
http.HandleFunc("/img/", imgServer)
http.HandleFunc("/shutdown/", haltServer) http.HandleFunc("/shutdown/", haltServer)
http.HandleFunc("/favicon.ico", http.NotFound) http.HandleFunc("/favicon.ico", http.NotFound)
log.Printf("Web Rendering Proxy Version %s\n", version) log.Printf("Web Rendering Proxy Version %s\n", version)