mirror of
https://github.com/tenox7/wrp.git
synced 2024-10-31 21:07:41 +00:00
156 lines
4.2 KiB
Go
156 lines
4.2 KiB
Go
//
|
|
// WRP - Web Rendering Proxy
|
|
//
|
|
// Copyright (c) 2013-2018 Antoni Sawicki
|
|
// Copyright (c) 2019 Google LLC
|
|
//
|
|
|
|
package main
|
|
|
|
import (
|
|
"bytes"
|
|
"context"
|
|
"flag"
|
|
"fmt"
|
|
_ "image"
|
|
"image/gif"
|
|
"image/png"
|
|
"log"
|
|
"math/rand"
|
|
"net/http"
|
|
"net/url"
|
|
"os"
|
|
"strconv"
|
|
"time"
|
|
|
|
"github.com/chromedp/cdproto/emulation"
|
|
|
|
"github.com/chromedp/cdproto/cdp"
|
|
"github.com/chromedp/cdproto/dom"
|
|
"github.com/chromedp/chromedp"
|
|
)
|
|
|
|
var (
|
|
ctx context.Context
|
|
cancel context.CancelFunc
|
|
gifmap = make(map[string]bytes.Buffer)
|
|
)
|
|
|
|
func pageServer(out http.ResponseWriter, req *http.Request) {
|
|
req.ParseForm()
|
|
furl := req.Form["url"]
|
|
var gourl string
|
|
if len(furl) >= 1 && len(furl[0]) > 4 {
|
|
gourl = furl[0]
|
|
} else {
|
|
gourl = "https://www.bbc.com/news"
|
|
}
|
|
log.Printf("%s Page Reqest for %s [%s]\n", req.RemoteAddr, gourl, req.URL.Path)
|
|
out.Header().Set("Content-Type", "text/html")
|
|
fmt.Fprintf(out, "<HTML>\n<HEAD><TITLE>WRP %s</TITLE>\n<BODY BGCOLOR=\"#F0F0F0\">", gourl)
|
|
fmt.Fprintf(out, "<FORM ACTION=\"/\">URL: <INPUT TYPE=\"TEXT\" NAME=\"url\" VALUE=\"%s\">", gourl)
|
|
fmt.Fprintf(out, "<INPUT TYPE=\"SUBMIT\" VALUE=\"Go\"></FORM><P>\n")
|
|
if len(gourl) > 4 {
|
|
capture(gourl, out)
|
|
}
|
|
fmt.Fprintf(out, "</BODY>\n</HTML>\n")
|
|
}
|
|
|
|
func imgServer(out http.ResponseWriter, req *http.Request) {
|
|
log.Printf("%s Img Request for %s\n", req.RemoteAddr, req.URL.Path)
|
|
gifbuf := gifmap[req.URL.Path]
|
|
defer delete(gifmap, req.URL.Path)
|
|
out.Header().Set("Content-Type", "image/gif")
|
|
out.Header().Set("Content-Length", strconv.Itoa(len(gifbuf.Bytes())))
|
|
out.Write(gifbuf.Bytes())
|
|
out.(http.Flusher).Flush()
|
|
}
|
|
|
|
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)
|
|
}
|
|
|
|
func capture(gourl string, out http.ResponseWriter) {
|
|
var nodes []*cdp.Node
|
|
ctxx := chromedp.FromContext(ctx)
|
|
var pngbuf []byte
|
|
var gifbuf bytes.Buffer
|
|
var loc string
|
|
|
|
log.Printf("Processing Caputure Request for %s\n", gourl)
|
|
|
|
// Run ChromeDP Magic
|
|
chromedp.Run(ctx,
|
|
emulation.SetDeviceMetricsOverride(1024, 768, 1.0, false),
|
|
chromedp.Navigate(gourl),
|
|
chromedp.Sleep(time.Second*2),
|
|
chromedp.CaptureScreenshot(&pngbuf),
|
|
chromedp.Location(&loc),
|
|
chromedp.Nodes("a", &nodes, chromedp.ByQueryAll))
|
|
|
|
log.Printf("Landed on: %s, Got %d nodes\n", loc, len(nodes))
|
|
|
|
// Process Screenshot Image
|
|
img, err := png.Decode(bytes.NewReader(pngbuf))
|
|
if err != nil {
|
|
log.Printf("Failed to decode screenshot: %s\n", err)
|
|
fmt.Fprintf(out, "<BR>Unable to decode page screenshot:<BR>%s<BR>\n", err)
|
|
return
|
|
}
|
|
gifbuf.Reset()
|
|
err = gif.Encode(&gifbuf, img, nil)
|
|
if err != nil {
|
|
log.Printf("Failed to encode GIF: %s\n", err)
|
|
fmt.Fprintf(out, "<BR>Unable to encode GIF:<BR>%s<BR>\n", err)
|
|
return
|
|
}
|
|
imgpath := fmt.Sprintf("/img/%04d.gif", rand.Intn(9999))
|
|
gifmap[imgpath] = gifbuf
|
|
|
|
// Process Nodes
|
|
base, _ := url.Parse(loc)
|
|
fmt.Fprintf(out, "<IMG SRC=\"%s\" ALT=\"wrp\" USEMAP=\"#map\">\n<MAP NAME=\"map\">\n", imgpath)
|
|
log.Printf("Image path will be: %s", 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", tgt)
|
|
|
|
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",
|
|
b.Content[0], b.Content[1], b.Content[4], b.Content[5], n.AttributeValue("href"), n.AttributeValue("href"), target)
|
|
}
|
|
}
|
|
|
|
fmt.Fprintf(out, "</MAP>\n")
|
|
out.(http.Flusher).Flush()
|
|
log.Printf("Done with caputure for %s\n", gourl)
|
|
}
|
|
|
|
func main() {
|
|
ctx, cancel = chromedp.NewContext(context.Background())
|
|
defer cancel()
|
|
var addr string
|
|
flag.StringVar(&addr, "l", ":8080", "Listen address:port, default :8080")
|
|
flag.Parse()
|
|
rand.Seed(time.Now().UnixNano())
|
|
http.HandleFunc("/", pageServer)
|
|
http.HandleFunc("/img/", imgServer)
|
|
http.HandleFunc("/favicon.ico", http.NotFound)
|
|
http.HandleFunc("/halt", haltServer)
|
|
log.Printf("Starting http server on %s\n", addr)
|
|
http.ListenAndServe(addr, nil)
|
|
}
|