2019-05-30 01:53:05 +00:00
|
|
|
//
|
|
|
|
// WRP - Web Rendering Proxy
|
|
|
|
//
|
|
|
|
// Copyright (c) 2013-2018 Antoni Sawicki
|
|
|
|
// Copyright (c) 2019 Google LLC
|
|
|
|
//
|
|
|
|
|
2019-05-29 08:29:01 +00:00
|
|
|
package main
|
|
|
|
|
|
|
|
import (
|
2019-05-30 06:49:39 +00:00
|
|
|
"bytes"
|
2019-05-29 08:52:28 +00:00
|
|
|
"context"
|
|
|
|
"flag"
|
|
|
|
"fmt"
|
2019-05-30 06:49:39 +00:00
|
|
|
_ "image"
|
|
|
|
"image/gif"
|
|
|
|
"image/png"
|
2019-05-29 08:52:28 +00:00
|
|
|
"log"
|
2019-05-30 09:03:17 +00:00
|
|
|
"math/rand"
|
2019-05-29 08:52:28 +00:00
|
|
|
"net/http"
|
2019-05-30 06:49:39 +00:00
|
|
|
"net/url"
|
2019-05-30 07:07:08 +00:00
|
|
|
"os"
|
2019-05-29 08:52:28 +00:00
|
|
|
"strconv"
|
2019-05-31 07:36:53 +00:00
|
|
|
"strings"
|
2019-05-29 08:52:28 +00:00
|
|
|
"time"
|
2019-05-29 08:29:01 +00:00
|
|
|
|
2019-05-29 09:39:06 +00:00
|
|
|
"github.com/chromedp/cdproto/emulation"
|
2019-05-31 07:19:10 +00:00
|
|
|
"github.com/chromedp/cdproto/runtime"
|
2019-05-29 09:39:06 +00:00
|
|
|
|
2019-05-29 08:52:28 +00:00
|
|
|
"github.com/chromedp/cdproto/cdp"
|
|
|
|
"github.com/chromedp/cdproto/dom"
|
|
|
|
"github.com/chromedp/chromedp"
|
2019-05-29 08:29:01 +00:00
|
|
|
)
|
|
|
|
|
2019-06-02 09:25:18 +00:00
|
|
|
// Ismap for server side processing
|
|
|
|
type Ismap struct {
|
|
|
|
xmin int64
|
|
|
|
ymin int64
|
|
|
|
xmax int64
|
|
|
|
ymax int64
|
|
|
|
url string
|
|
|
|
}
|
|
|
|
|
2019-05-29 08:29:01 +00:00
|
|
|
var (
|
2019-05-29 08:52:28 +00:00
|
|
|
ctx context.Context
|
|
|
|
cancel context.CancelFunc
|
2019-05-30 09:03:17 +00:00
|
|
|
gifmap = make(map[string]bytes.Buffer)
|
2019-06-02 09:25:18 +00:00
|
|
|
ismap = make(map[string][]Ismap)
|
2019-05-29 08:29:01 +00:00
|
|
|
)
|
|
|
|
|
2019-06-02 23:05:36 +00:00
|
|
|
func pageServer(out http.ResponseWriter, req *http.Request) {
|
|
|
|
req.ParseForm()
|
|
|
|
u := req.FormValue("url")
|
2019-05-31 08:56:34 +00:00
|
|
|
var istr string
|
|
|
|
var i bool
|
2019-06-02 23:05:36 +00:00
|
|
|
if req.FormValue("i") == "on" {
|
2019-05-31 08:56:34 +00:00
|
|
|
istr = "CHECKED"
|
|
|
|
i = true
|
|
|
|
} else {
|
|
|
|
istr = ""
|
|
|
|
i = false
|
|
|
|
}
|
2019-06-02 23:05:36 +00:00
|
|
|
p, _ := strconv.ParseInt(req.FormValue("p"), 10, 64)
|
|
|
|
if req.FormValue("pg") == "Next" {
|
2019-05-31 23:41:25 +00:00
|
|
|
p++
|
2019-06-02 23:05:36 +00:00
|
|
|
} else if req.FormValue("pg") == "Prev" {
|
2019-05-31 23:41:25 +00:00
|
|
|
p--
|
2019-06-01 00:49:14 +00:00
|
|
|
} else {
|
|
|
|
p = 0
|
2019-05-31 23:41:25 +00:00
|
|
|
}
|
2019-06-02 23:05:36 +00:00
|
|
|
w, _ := strconv.ParseInt(req.FormValue("w"), 10, 64)
|
2019-05-31 01:08:48 +00:00
|
|
|
if w < 10 {
|
|
|
|
w = 1024
|
|
|
|
}
|
2019-06-02 23:05:36 +00:00
|
|
|
h, _ := strconv.ParseInt(req.FormValue("h"), 10, 64)
|
2019-05-31 01:08:48 +00:00
|
|
|
if h < 10 {
|
|
|
|
h = 768
|
2019-05-29 08:52:28 +00:00
|
|
|
}
|
2019-06-02 23:05:36 +00:00
|
|
|
s, _ := strconv.ParseFloat(req.FormValue("s"), 64)
|
2019-05-31 01:08:48 +00:00
|
|
|
if s < 0.1 {
|
|
|
|
s = 1.0
|
|
|
|
}
|
2019-06-02 23:05:36 +00:00
|
|
|
log.Printf("%s Page Reqest for url=\"%s\" [%s]\n", req.RemoteAddr, u, req.URL.Path)
|
2019-05-29 08:52:28 +00:00
|
|
|
out.Header().Set("Content-Type", "text/html")
|
2019-06-01 01:20:55 +00:00
|
|
|
fmt.Fprintf(out, "<HTML>\n<HEAD><TITLE>WRP %s</TITLE></HEAD>\n<BODY BGCOLOR=\"#F0F0F0\">", u)
|
2019-05-31 07:36:53 +00:00
|
|
|
fmt.Fprintf(out, "<FORM ACTION=\"/\">URL/Search: <INPUT TYPE=\"TEXT\" NAME=\"url\" VALUE=\"%s\" SIZE=\"40\">", u)
|
2019-05-31 01:08:48 +00:00
|
|
|
fmt.Fprintf(out, "<INPUT TYPE=\"SUBMIT\" VALUE=\"Go\"><P>\n")
|
2019-06-01 01:20:55 +00:00
|
|
|
fmt.Fprintf(out, "ISMAP:<INPUT TYPE=\"CHECKBOX\" NAME=\"i\" %s> \n", istr)
|
2019-05-31 07:19:10 +00:00
|
|
|
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)
|
2019-05-31 23:41:25 +00:00
|
|
|
fmt.Fprintf(out, "Page:<INPUT TYPE=\"HIDDEN\" NAME=\"p\" VALUE=\"%d\"> \n", p)
|
2019-06-01 08:17:41 +00:00
|
|
|
fmt.Fprintf(out, "<INPUT TYPE=\"SUBMIT\" NAME=\"pg\" VALUE=\"Prev\"> %d \n", p)
|
|
|
|
fmt.Fprintf(out, "<INPUT TYPE=\"SUBMIT\" NAME=\"pg\" VALUE=\"Next\"> \n")
|
2019-06-01 01:20:55 +00:00
|
|
|
fmt.Fprintf(out, "</FORM><P>\n")
|
2019-05-31 01:08:48 +00:00
|
|
|
if len(u) > 4 {
|
2019-05-31 07:36:53 +00:00
|
|
|
if strings.HasPrefix(u, "http") {
|
2019-06-02 23:05:36 +00:00
|
|
|
capture(u, w, h, s, p, i, req.RemoteAddr, out)
|
2019-05-31 07:36:53 +00:00
|
|
|
} else {
|
2019-06-02 23:05:36 +00:00
|
|
|
capture(fmt.Sprintf("http://www.google.com/search?q=%s", url.QueryEscape(u)), w, h, s, p, i, req.RemoteAddr, out)
|
2019-05-31 07:36:53 +00:00
|
|
|
}
|
2019-05-31 01:08:48 +00:00
|
|
|
} else {
|
2019-05-31 07:36:53 +00:00
|
|
|
fmt.Fprintf(out, "No URL or search query specified")
|
2019-05-29 08:52:28 +00:00
|
|
|
}
|
|
|
|
fmt.Fprintf(out, "</BODY>\n</HTML>\n")
|
2019-05-29 08:29:01 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
func imgServer(out http.ResponseWriter, req *http.Request) {
|
2019-06-01 01:20:55 +00:00
|
|
|
log.Printf("%s IMG Request for %s\n", req.RemoteAddr, req.URL.Path)
|
2019-05-30 09:03:17 +00:00
|
|
|
gifbuf := gifmap[req.URL.Path]
|
|
|
|
defer delete(gifmap, req.URL.Path)
|
2019-05-30 01:02:29 +00:00
|
|
|
out.Header().Set("Content-Type", "image/gif")
|
|
|
|
out.Header().Set("Content-Length", strconv.Itoa(len(gifbuf.Bytes())))
|
|
|
|
out.Write(gifbuf.Bytes())
|
2019-05-30 09:03:17 +00:00
|
|
|
out.(http.Flusher).Flush()
|
2019-05-29 08:29:01 +00:00
|
|
|
}
|
|
|
|
|
2019-06-01 01:20:55 +00:00
|
|
|
func mapServer(out http.ResponseWriter, req *http.Request) {
|
2019-06-02 22:55:58 +00:00
|
|
|
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)
|
2019-06-02 23:05:36 +00:00
|
|
|
log.Printf("%s ISMAP n=%d, err=%s\n", req.RemoteAddr, n, err)
|
2019-06-02 22:55:58 +00:00
|
|
|
return
|
|
|
|
}
|
|
|
|
is := ismap[req.URL.Path]
|
|
|
|
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
|
|
|
|
}
|
2019-06-02 23:05:36 +00:00
|
|
|
log.Printf("%s ISMAP Redirect to: %s\n", req.RemoteAddr, loc)
|
2019-06-02 22:55:58 +00:00
|
|
|
http.Redirect(out, req, loc, 301)
|
2019-06-01 01:20:55 +00:00
|
|
|
}
|
|
|
|
|
2019-05-30 07:07:08 +00:00
|
|
|
func haltServer(out http.ResponseWriter, req *http.Request) {
|
|
|
|
log.Printf("%s Shutdown request received [%s]\n", req.RemoteAddr, req.URL.Path)
|
|
|
|
out.Header().Set("Content-Type", "text/plain")
|
|
|
|
fmt.Fprintf(out, "WRP Shutdown")
|
|
|
|
out.(http.Flusher).Flush()
|
|
|
|
cancel()
|
|
|
|
os.Exit(0)
|
|
|
|
}
|
|
|
|
|
2019-06-02 23:05:36 +00:00
|
|
|
func capture(gourl string, w int64, h int64, s float64, p int64, i bool, c string, out http.ResponseWriter) {
|
2019-05-29 08:52:28 +00:00
|
|
|
var nodes []*cdp.Node
|
|
|
|
ctxx := chromedp.FromContext(ctx)
|
2019-05-30 09:03:17 +00:00
|
|
|
var pngbuf []byte
|
|
|
|
var gifbuf bytes.Buffer
|
2019-05-30 01:48:07 +00:00
|
|
|
var loc string
|
2019-05-31 07:19:10 +00:00
|
|
|
var res *runtime.RemoteObject
|
2019-06-02 09:25:18 +00:00
|
|
|
is := make([]Ismap, 0)
|
2019-06-02 22:55:58 +00:00
|
|
|
var istr string
|
2019-05-29 08:29:01 +00:00
|
|
|
|
2019-06-02 23:05:36 +00:00
|
|
|
log.Printf("%s Processing Caputure Request for %s\n", c, gourl)
|
2019-05-29 09:39:06 +00:00
|
|
|
|
2019-05-30 09:03:17 +00:00
|
|
|
// Run ChromeDP Magic
|
2019-05-31 07:41:46 +00:00
|
|
|
err := chromedp.Run(ctx,
|
2019-05-31 01:08:48 +00:00
|
|
|
emulation.SetDeviceMetricsOverride(w, h, s, false),
|
2019-05-30 01:48:07 +00:00
|
|
|
chromedp.Navigate(gourl),
|
2019-05-31 23:41:25 +00:00
|
|
|
chromedp.Evaluate(fmt.Sprintf("window.scrollTo(0, %d);", p*int64(float64(h)*float64(0.9))), &res),
|
2019-05-31 07:19:10 +00:00
|
|
|
chromedp.Sleep(time.Second*1),
|
2019-05-30 09:03:17 +00:00
|
|
|
chromedp.CaptureScreenshot(&pngbuf),
|
2019-05-30 01:48:07 +00:00
|
|
|
chromedp.Location(&loc),
|
2019-05-29 08:52:28 +00:00
|
|
|
chromedp.Nodes("a", &nodes, chromedp.ByQueryAll))
|
2019-05-29 08:29:01 +00:00
|
|
|
|
2019-05-31 07:41:46 +00:00
|
|
|
if err != nil {
|
2019-06-02 23:05:36 +00:00
|
|
|
log.Printf("%s %s", c, err)
|
2019-05-31 07:41:46 +00:00
|
|
|
fmt.Fprintf(out, "<BR>%s<BR>", err)
|
|
|
|
return
|
|
|
|
}
|
|
|
|
|
2019-06-02 23:05:36 +00:00
|
|
|
log.Printf("%s Landed on: %s, Nodes: %d\n", c, loc, len(nodes))
|
2019-05-30 01:48:07 +00:00
|
|
|
|
2019-05-30 09:03:17 +00:00
|
|
|
// Process Screenshot Image
|
2019-05-30 09:15:52 +00:00
|
|
|
bytes.NewReader(pngbuf).Seek(0, 0)
|
2019-05-30 09:03:17 +00:00
|
|
|
img, err := png.Decode(bytes.NewReader(pngbuf))
|
2019-05-30 01:48:07 +00:00
|
|
|
if err != nil {
|
2019-06-02 23:05:36 +00:00
|
|
|
log.Printf("%s Failed to decode screenshot: %s\n", c, err)
|
2019-05-30 06:49:39 +00:00
|
|
|
fmt.Fprintf(out, "<BR>Unable to decode page screenshot:<BR>%s<BR>\n", err)
|
|
|
|
return
|
2019-05-30 01:48:07 +00:00
|
|
|
}
|
|
|
|
gifbuf.Reset()
|
2019-05-30 07:53:59 +00:00
|
|
|
err = gif.Encode(&gifbuf, img, nil)
|
|
|
|
if err != nil {
|
2019-06-02 23:05:36 +00:00
|
|
|
log.Printf("%s Failed to encode GIF: %s\n", c, err)
|
2019-05-30 07:53:59 +00:00
|
|
|
fmt.Fprintf(out, "<BR>Unable to encode GIF:<BR>%s<BR>\n", err)
|
|
|
|
return
|
|
|
|
}
|
2019-06-02 09:25:18 +00:00
|
|
|
seq := rand.Intn(9999)
|
|
|
|
imgpath := fmt.Sprintf("/img/%04d.gif", seq)
|
|
|
|
mappath := fmt.Sprintf("/map/%04d.map", seq)
|
2019-06-02 23:05:36 +00:00
|
|
|
log.Printf("%s Encoded GIF image: %s, Size: %dKB\n", c, imgpath, len(gifbuf.Bytes())/1024)
|
2019-05-30 09:03:17 +00:00
|
|
|
gifmap[imgpath] = gifbuf
|
2019-05-30 01:02:29 +00:00
|
|
|
|
2019-05-30 09:03:17 +00:00
|
|
|
// Process Nodes
|
2019-05-30 01:48:07 +00:00
|
|
|
base, _ := url.Parse(loc)
|
2019-06-02 09:25:18 +00:00
|
|
|
if i {
|
|
|
|
fmt.Fprintf(out, "<A HREF=\"%s\"><IMG SRC=\"%s\" ALT=\"wrp\" ISMAP></A>", mappath, imgpath)
|
2019-06-02 22:55:58 +00:00
|
|
|
is = append(is, Ismap{xmin: -1, xmax: -1, ymin: -1, ymax: -1, url: fmt.Sprintf("/?url=%s&w=%d&h=%d&s=%1.2f&i=on", loc, w, h, s)})
|
|
|
|
istr = "i=on"
|
2019-06-01 01:20:55 +00:00
|
|
|
} else {
|
|
|
|
fmt.Fprintf(out, "<IMG SRC=\"%s\" ALT=\"wrp\" USEMAP=\"#map\">\n<MAP NAME=\"map\">\n", imgpath)
|
|
|
|
}
|
2019-05-29 08:29:01 +00:00
|
|
|
|
2019-05-29 08:52:28 +00:00
|
|
|
for _, n := range nodes {
|
|
|
|
b, err := dom.GetBoxModel().WithNodeID(n.NodeID).Do(cdp.WithExecutor(ctx, ctxx.Target))
|
2019-05-30 01:48:07 +00:00
|
|
|
if err != nil {
|
|
|
|
continue
|
|
|
|
}
|
|
|
|
tgt, err := base.Parse(n.AttributeValue("href"))
|
|
|
|
if err != nil {
|
|
|
|
continue
|
2019-05-29 08:52:28 +00:00
|
|
|
}
|
2019-06-02 22:55:58 +00:00
|
|
|
target := fmt.Sprintf("/?url=%s&w=%d&h=%d&s=%1.2f&%s", tgt, w, h, s, istr) // no page# here
|
2019-05-29 08:29:01 +00:00
|
|
|
|
2019-05-30 01:48:07 +00:00
|
|
|
if len(b.Content) > 6 && len(target) > 7 {
|
2019-06-02 09:25:18 +00:00
|
|
|
if i {
|
|
|
|
is = append(is, Ismap{
|
|
|
|
xmin: int64(b.Content[0] * s), ymin: int64(b.Content[1] * s),
|
|
|
|
xmax: int64(b.Content[4] * s), ymax: int64(b.Content[5] * s),
|
|
|
|
url: target})
|
2019-06-01 01:20:55 +00:00
|
|
|
} else {
|
2019-06-01 08:17:50 +00:00
|
|
|
fmt.Fprintf(out, "<AREA SHAPE=\"RECT\" COORDS=\"%.f,%.f,%.f,%.f\" ALT=\"%s\" TITLE=\"%s\" HREF=\"%s\">\n",
|
|
|
|
b.Content[0]*s, b.Content[1]*s, b.Content[4]*s, b.Content[5]*s, n.AttributeValue("href"), n.AttributeValue("href"), target)
|
2019-06-01 01:20:55 +00:00
|
|
|
}
|
2019-05-29 08:52:28 +00:00
|
|
|
}
|
|
|
|
}
|
2019-05-29 08:29:01 +00:00
|
|
|
|
2019-06-02 23:05:36 +00:00
|
|
|
if i {
|
|
|
|
log.Printf("%s Encoded ISMAP %s\n", c, mappath)
|
|
|
|
} else {
|
2019-06-01 01:20:55 +00:00
|
|
|
fmt.Fprintf(out, "</MAP>\n")
|
|
|
|
}
|
2019-05-30 09:03:17 +00:00
|
|
|
out.(http.Flusher).Flush()
|
2019-06-02 23:05:36 +00:00
|
|
|
log.Printf("%s Done with caputure for %s\n", c, gourl)
|
2019-06-02 09:25:18 +00:00
|
|
|
ismap[mappath] = is
|
2019-05-29 08:29:01 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
func main() {
|
2019-05-29 08:52:28 +00:00
|
|
|
ctx, cancel = chromedp.NewContext(context.Background())
|
|
|
|
defer cancel()
|
|
|
|
var addr string
|
|
|
|
flag.StringVar(&addr, "l", ":8080", "Listen address:port, default :8080")
|
|
|
|
flag.Parse()
|
2019-05-30 09:03:17 +00:00
|
|
|
rand.Seed(time.Now().UnixNano())
|
2019-05-29 08:52:28 +00:00
|
|
|
http.HandleFunc("/", pageServer)
|
2019-05-30 09:03:17 +00:00
|
|
|
http.HandleFunc("/img/", imgServer)
|
2019-06-01 01:20:55 +00:00
|
|
|
http.HandleFunc("/map/", mapServer)
|
2019-05-30 01:47:03 +00:00
|
|
|
http.HandleFunc("/favicon.ico", http.NotFound)
|
2019-05-30 07:07:08 +00:00
|
|
|
http.HandleFunc("/halt", haltServer)
|
2019-05-31 06:40:43 +00:00
|
|
|
log.Printf("Starting WRP http server on %s\n", addr)
|
2019-05-29 08:52:28 +00:00
|
|
|
http.ListenAndServe(addr, nil)
|
2019-05-29 08:29:01 +00:00
|
|
|
}
|