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https://github.com/tenox7/wrp.git
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initial
This commit is contained in:
Antoni Sawicki
parent
404af50aa1
commit
1f5592cbde
79
wrp.go
79
wrp.go
@ -26,7 +26,6 @@ import (
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"github.com/chromedp/cdproto/runtime"
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"github.com/chromedp/cdproto/cdp"
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"github.com/chromedp/cdproto/dom"
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"github.com/chromedp/chromedp"
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"github.com/ericpauley/go-quantize/quantize"
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@ -53,17 +52,7 @@ var (
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func pageServer(out http.ResponseWriter, req *http.Request) {
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req.ParseForm()
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u := req.FormValue("url")
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var istr string
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var ion string
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var i bool
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if req.FormValue("i") == "on" {
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istr = "CHECKED"
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i = true
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ion = "&i=on"
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} else {
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istr = ""
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i = false
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}
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p, _ := strconv.ParseInt(req.FormValue("p"), 10, 64)
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if req.FormValue("pg") == "Dn" {
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p++
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@ -88,7 +77,7 @@ func pageServer(out http.ResponseWriter, req *http.Request) {
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if c < 2 || c > 256 {
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c = 256
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}
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log.Printf("%s Page Request for url=\"%s\" [%s]\n", req.RemoteAddr, u, req.URL.Path)
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log.Printf("%s Page Request for url=\"%s\" [%s] [%+v]\n", req.RemoteAddr, u, req.URL.Path, req.URL.RawQuery)
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out.Header().Set("Content-Type", "text/html")
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fmt.Fprintf(out, "<!-- Web Rendering Proxy Version %s -->\n", version)
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fmt.Fprintf(out, "<HTML>\n<HEAD><TITLE>WRP %s</TITLE></HEAD>\n<BODY BGCOLOR=\"#F0F0F0\">\n", u)
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@ -97,7 +86,6 @@ func pageServer(out http.ResponseWriter, req *http.Request) {
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fmt.Fprintf(out, "<INPUT TYPE=\"SUBMIT\" NAME=\"pg\" VALUE=\"Up\"> \n")
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fmt.Fprintf(out, "<INPUT TYPE=\"TEXT\" NAME=\"p\" VALUE=\"%d\" SIZE=\"2\"> \n", p)
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fmt.Fprintf(out, "<INPUT TYPE=\"SUBMIT\" NAME=\"pg\" VALUE=\"Dn\"> \n")
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fmt.Fprintf(out, "I <INPUT TYPE=\"CHECKBOX\" NAME=\"i\" %s> \n", istr)
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fmt.Fprintf(out, "W <INPUT TYPE=\"TEXT\" NAME=\"w\" VALUE=\"%d\" SIZE=\"4\"> \n", w)
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fmt.Fprintf(out, "H <INPUT TYPE=\"TEXT\" NAME=\"h\" VALUE=\"%d\" SIZE=\"4\"> \n", h)
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fmt.Fprintf(out, "S <INPUT TYPE=\"TEXT\" NAME=\"s\" VALUE=\"%1.2f\" SIZE=\"3\"> \n", s)
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@ -105,14 +93,14 @@ func pageServer(out http.ResponseWriter, req *http.Request) {
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fmt.Fprintf(out, "</FORM><BR>\n")
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if len(u) > 1 {
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if strings.HasPrefix(u, "http") {
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capture(u, w, h, s, int(c), p, i, req.RemoteAddr, out)
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capture(u, w, h, s, int(c), p, req.RemoteAddr, out)
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} else {
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capture(fmt.Sprintf("http://www.google.com/search?q=%s", url.QueryEscape(u)), w, h, s, int(c), p, i, req.RemoteAddr, out)
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capture(fmt.Sprintf("http://www.google.com/search?q=%s", url.QueryEscape(u)), w, h, s, int(c), p, req.RemoteAddr, out)
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}
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} else {
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fmt.Fprintf(out, "No URL or search query specified")
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}
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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)
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fmt.Fprintf(out, "\n<P><A HREF=\"/?url=https://github.com/tenox7/wrp/&w=%d&h=%d&s=%1.2f&c=%d\">Web Rendering Proxy Version %s</A> | <A HREF=\"/shutdown/\">Shutdown WRP</A></BODY>\n</HTML>\n", w, h, s, c, version)
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}
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func imgServer(out http.ResponseWriter, req *http.Request) {
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@ -159,15 +147,12 @@ func mapServer(out http.ResponseWriter, req *http.Request) {
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http.Redirect(out, req, fmt.Sprintf("http://%s%s", req.Context().Value(http.LocalAddrContextKey), loc), 301)
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}
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func capture(gourl string, w int64, h int64, s float64, co int, p int64, i bool, c string, out http.ResponseWriter) {
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func capture(gourl string, w int64, h int64, s float64, co int, p int64, c string, out http.ResponseWriter) {
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var nodes []*cdp.Node
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ctxx := chromedp.FromContext(ctx)
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var pngbuf []byte
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var gifbuf bytes.Buffer
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var loc string
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var res *runtime.RemoteObject
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is := make([]Ismap, 0)
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var ion string
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log.Printf("%s Processing Capture Request for %s\n", c, gourl)
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@ -177,7 +162,6 @@ func capture(gourl string, w int64, h int64, s float64, co int, p int64, i bool,
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chromedp.Navigate(gourl),
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chromedp.Evaluate(fmt.Sprintf("window.scrollTo(0, %d);", p*int64(float64(h)*float64(0.9))), &res),
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chromedp.Sleep(time.Second*1),
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chromedp.CaptureScreenshot(&pngbuf),
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chromedp.Location(&loc))
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if err != nil {
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@ -195,6 +179,12 @@ func capture(gourl string, w int64, h int64, s float64, co int, p int64, i bool,
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log.Printf("%s Landed on: %s, Nodes: %d\n", c, loc, len(nodes))
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// Process Screenshot Image
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err = chromedp.Run(ctx, chromedp.CaptureScreenshot(&pngbuf))
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if err != nil {
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log.Printf("%s Failed to capture screenshot: %s\n", c, err)
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fmt.Fprintf(out, "<BR>Unable to capture screenshot:<BR>%s<BR>\n", err)
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return
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}
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bytes.NewReader(pngbuf).Seek(0, 0)
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img, err := png.Decode(bytes.NewReader(pngbuf))
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if err != nil {
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@ -211,53 +201,12 @@ func capture(gourl string, w int64, h int64, s float64, co int, p int64, i bool,
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}
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seq := rand.Intn(9999)
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imgpath := fmt.Sprintf("/img/%04d.gif", seq)
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mappath := fmt.Sprintf("/map/%04d.map", seq)
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log.Printf("%s Encoded GIF image: %s, Size: %dKB, Colors: %d\n", c, imgpath, len(gifbuf.Bytes())/1024, co)
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gifmap[imgpath] = gifbuf
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// Process Nodes
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tctx, cancel := context.WithTimeout(ctx, time.Second*2) // a context with timeout is needed for pages without nodes
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defer cancel()
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chromedp.Run(tctx, chromedp.Nodes("a", &nodes, chromedp.ByQueryAll))
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base, _ := url.Parse(loc)
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if i {
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fmt.Fprintf(out, "<A HREF=\"%s\"><IMG SRC=\"%s\" ALT=\"wrp\" BORDER=\"0\" ISMAP></A>", mappath, imgpath)
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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)})
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ion = "&i=on"
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} else {
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fmt.Fprintf(out, "<IMG SRC=\"%s\" ALT=\"wrp\" BORDER=\"0\" USEMAP=\"#map\">\n<MAP NAME=\"map\">\n", imgpath)
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}
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// Gif location
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fmt.Fprintf(out, "<A HREF=\"/w=100/h=100/s=1.0/pg=3/url=%s\"><IMG SRC=\"%s\" ALT=\"wrp\" BORDER=\"0\" ISMAP></A>", loc, imgpath)
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for _, n := range nodes {
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b, err := dom.GetBoxModel().WithNodeID(n.NodeID).Do(cdp.WithExecutor(ctx, ctxx.Target))
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if err != nil {
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continue
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}
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tgt, err := base.Parse(n.AttributeValue("href"))
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if err != nil {
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continue
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}
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target := fmt.Sprintf("/?url=%s&w=%d&h=%d&s=%1.2f&c=%d%s", tgt, w, h, s, co, ion) // no page# here
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if len(b.Padding) > 6 && len(target) > 7 {
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if i {
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is = append(is, Ismap{
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xmin: int64(b.Padding[0] * s), ymin: int64(b.Padding[1] * s),
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xmax: int64(b.Padding[4] * s), ymax: int64(b.Padding[5] * s),
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url: target})
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} else {
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fmt.Fprintf(out, "<AREA SHAPE=\"RECT\" COORDS=\"%.f,%.f,%.f,%.f\" ALT=\"%s\" TITLE=\"%s\" HREF=\"%s\">\n",
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b.Padding[0]*s, b.Padding[1]*s, b.Padding[4]*s, b.Padding[5]*s, n.AttributeValue("href"), n.AttributeValue("href"), target)
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}
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}
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}
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if i {
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log.Printf("%s Encoded ISMAP %s\n", c, mappath)
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} else {
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fmt.Fprintf(out, "</MAP>\n")
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}
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ismap[mappath] = is
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out.(http.Flusher).Flush()
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log.Printf("%s Done with caputure for %s\n", c, gourl)
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}
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