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rename wrpReq variable names to be more readable

This commit is contained in:
Antoni Sawicki 2020-04-25 23:56:14 -07:00
parent c4e3671468
commit 34b25be7d7
1 changed files with 107 additions and 106 deletions
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213
wrp.go
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@ -54,112 +54,112 @@ type geom struct {
// WRP 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
F string // Fn buttons
T string // imgtype
o http.ResponseWriter
r *http.Request
url string // url
width int64 // width
height int64 // height
scale float64 // scale
colors int64 // #colors
mouseX int64 // mouseX
mouseY int64 // mouseY
keys string // keys to send
buttons string // Fn buttons
imgType string // imgtype
out http.ResponseWriter
req *http.Request
}
// Parse HTML Form, Process Input Boxes, Etc.
func (w *wrpReq) parseForm() {
w.r.ParseForm()
w.U = w.r.FormValue("url")
if len(w.U) > 1 && !strings.HasPrefix(w.U, "http") {
w.U = fmt.Sprintf("http://www.google.com/search?q=%s", url.QueryEscape(w.U))
w.req.ParseForm()
w.url = w.req.FormValue("url")
if len(w.url) > 1 && !strings.HasPrefix(w.url, "http") {
w.url = fmt.Sprintf("http://www.google.com/search?q=%s", url.QueryEscape(w.url))
}
w.W, _ = strconv.ParseInt(w.r.FormValue("w"), 10, 64)
w.H, _ = strconv.ParseInt(w.r.FormValue("h"), 10, 64)
if w.W < 10 && w.H < 10 {
w.W = defgeom.w
w.H = defgeom.h
w.width, _ = strconv.ParseInt(w.req.FormValue("w"), 10, 64)
w.height, _ = strconv.ParseInt(w.req.FormValue("h"), 10, 64)
if w.width < 10 && w.height < 10 {
w.width = defgeom.w
w.height = defgeom.h
}
w.S, _ = strconv.ParseFloat(w.r.FormValue("s"), 64)
if w.S < 0.1 {
w.S = 1.0
w.scale, _ = strconv.ParseFloat(w.req.FormValue("s"), 64)
if w.scale < 0.1 {
w.scale = 1.0
}
w.C, _ = strconv.ParseInt(w.r.FormValue("c"), 10, 64)
if w.C < 2 || w.C > 256 {
w.C = defgeom.c
w.colors, _ = strconv.ParseInt(w.req.FormValue("c"), 10, 64)
if w.colors < 2 || w.colors > 256 {
w.colors = defgeom.c
}
w.K = w.r.FormValue("k")
w.F = w.r.FormValue("Fn")
w.T = w.r.FormValue("t")
if w.T != "gif" && w.T != "png" {
w.T = deftype
w.keys = w.req.FormValue("k")
w.buttons = w.req.FormValue("Fn")
w.imgType = w.req.FormValue("t")
if w.imgType != "gif" && w.imgType != "png" {
w.imgType = deftype
}
log.Printf("%s WrpReq from Form: %+v\n", w.r.RemoteAddr, w)
log.Printf("%s WrpReq from Form: %+v\n", w.req.RemoteAddr, w)
}
// Display WP UI
// TODO: make this in to an external template
func (w wrpReq) printPage(bgcolor string) {
var s string
w.o.Header().Set("Cache-Control", "max-age=0")
w.o.Header().Set("Expires", "-1")
w.o.Header().Set("Pragma", "no-cache")
w.o.Header().Set("Content-Type", "text/html")
fmt.Fprintf(w.o, "<!-- Web Rendering Proxy Version %s -->\n", version)
fmt.Fprintf(w.o, "<HTML>\n<HEAD><TITLE>WRP %s</TITLE></HEAD>\n<BODY BGCOLOR=\"%s\">\n", w.U, bgcolor)
fmt.Fprintf(w.o, "<FORM ACTION=\"/\" METHOD=\"POST\">\n")
fmt.Fprintf(w.o, "<INPUT TYPE=\"TEXT\" NAME=\"url\" VALUE=\"%s\" SIZE=\"20\">", w.U)
fmt.Fprintf(w.o, "<INPUT TYPE=\"SUBMIT\" VALUE=\"Go\">\n")
fmt.Fprintf(w.o, "<INPUT TYPE=\"SUBMIT\" NAME=\"Fn\" VALUE=\"Bk\">\n")
fmt.Fprintf(w.o, "W <INPUT TYPE=\"TEXT\" NAME=\"w\" VALUE=\"%d\" SIZE=\"4\"> \n", w.W)
fmt.Fprintf(w.o, "H <INPUT TYPE=\"TEXT\" NAME=\"h\" VALUE=\"%d\" SIZE=\"4\"> \n", w.H)
fmt.Fprintf(w.o, "S <SELECT NAME=\"s\">\n")
w.out.Header().Set("Cache-Control", "max-age=0")
w.out.Header().Set("Expires", "-1")
w.out.Header().Set("Pragma", "no-cache")
w.out.Header().Set("Content-Type", "text/html")
fmt.Fprintf(w.out, "<!-- Web Rendering Proxy Version %s -->\n", version)
fmt.Fprintf(w.out, "<HTML>\n<HEAD><TITLE>WRP %s</TITLE></HEAD>\n<BODY BGCOLOR=\"%s\">\n", w.url, bgcolor)
fmt.Fprintf(w.out, "<FORM ACTION=\"/\" METHOD=\"POST\">\n")
fmt.Fprintf(w.out, "<INPUT TYPE=\"TEXT\" NAME=\"url\" VALUE=\"%s\" SIZE=\"20\">", w.url)
fmt.Fprintf(w.out, "<INPUT TYPE=\"SUBMIT\" VALUE=\"Go\">\n")
fmt.Fprintf(w.out, "<INPUT TYPE=\"SUBMIT\" NAME=\"Fn\" VALUE=\"Bk\">\n")
fmt.Fprintf(w.out, "W <INPUT TYPE=\"TEXT\" NAME=\"w\" VALUE=\"%d\" SIZE=\"4\"> \n", w.width)
fmt.Fprintf(w.out, "H <INPUT TYPE=\"TEXT\" NAME=\"h\" VALUE=\"%d\" SIZE=\"4\"> \n", w.height)
fmt.Fprintf(w.out, "S <SELECT NAME=\"s\">\n")
for _, v := range []float64{0.65, 0.75, 0.85, 0.95, 1.0, 1.05, 1.15, 1.25} {
if v == w.S {
if v == w.scale {
s = "SELECTED"
} else {
s = ""
}
fmt.Fprintf(w.o, "<OPTION VALUE=\"%1.2f\" %s>%1.2f</OPTION>\n", v, s, v)
fmt.Fprintf(w.out, "<OPTION VALUE=\"%1.2f\" %s>%1.2f</OPTION>\n", v, s, v)
}
fmt.Fprintf(w.o, "</SELECT>\n")
fmt.Fprintf(w.o, "T <SELECT NAME=\"t\">\n")
fmt.Fprintf(w.out, "</SELECT>\n")
fmt.Fprintf(w.out, "T <SELECT NAME=\"t\">\n")
for _, v := range []string{"gif", "png"} {
if v == w.T {
if v == w.imgType {
s = "SELECTED"
} else {
s = ""
}
fmt.Fprintf(w.o, "<OPTION VALUE=\"%s\" %s>%s</OPTION>\n", v, s, strings.ToUpper(v))
fmt.Fprintf(w.out, "<OPTION VALUE=\"%s\" %s>%s</OPTION>\n", v, s, strings.ToUpper(v))
}
fmt.Fprintf(w.o, "</SELECT>\n")
fmt.Fprintf(w.o, "C <INPUT TYPE=\"TEXT\" NAME=\"c\" VALUE=\"%d\" SIZE=\"3\">\n", w.C)
fmt.Fprintf(w.o, "K <INPUT TYPE=\"TEXT\" NAME=\"k\" VALUE=\"\" SIZE=\"4\"> \n")
fmt.Fprintf(w.o, "<INPUT TYPE=\"SUBMIT\" NAME=\"Fn\" VALUE=\"Bs\">\n")
fmt.Fprintf(w.o, "<INPUT TYPE=\"SUBMIT\" NAME=\"Fn\" VALUE=\"Rt\">\n")
fmt.Fprintf(w.o, "<INPUT TYPE=\"SUBMIT\" NAME=\"Fn\" VALUE=\"&lt;\">\n")
fmt.Fprintf(w.o, "<INPUT TYPE=\"SUBMIT\" NAME=\"Fn\" VALUE=\"^\">\n")
fmt.Fprintf(w.o, "<INPUT TYPE=\"SUBMIT\" NAME=\"Fn\" VALUE=\"v\">\n")
fmt.Fprintf(w.o, "<INPUT TYPE=\"SUBMIT\" NAME=\"Fn\" VALUE=\"&gt;\" SIZE=\"1\">\n")
fmt.Fprintf(w.o, "</FORM><BR>\n")
fmt.Fprintf(w.out, "</SELECT>\n")
fmt.Fprintf(w.out, "C <INPUT TYPE=\"TEXT\" NAME=\"c\" VALUE=\"%d\" SIZE=\"3\">\n", w.colors)
fmt.Fprintf(w.out, "K <INPUT TYPE=\"TEXT\" NAME=\"k\" VALUE=\"\" SIZE=\"4\"> \n")
fmt.Fprintf(w.out, "<INPUT TYPE=\"SUBMIT\" NAME=\"Fn\" VALUE=\"Bs\">\n")
fmt.Fprintf(w.out, "<INPUT TYPE=\"SUBMIT\" NAME=\"Fn\" VALUE=\"Rt\">\n")
fmt.Fprintf(w.out, "<INPUT TYPE=\"SUBMIT\" NAME=\"Fn\" VALUE=\"&lt;\">\n")
fmt.Fprintf(w.out, "<INPUT TYPE=\"SUBMIT\" NAME=\"Fn\" VALUE=\"^\">\n")
fmt.Fprintf(w.out, "<INPUT TYPE=\"SUBMIT\" NAME=\"Fn\" VALUE=\"v\">\n")
fmt.Fprintf(w.out, "<INPUT TYPE=\"SUBMIT\" NAME=\"Fn\" VALUE=\"&gt;\" SIZE=\"1\">\n")
fmt.Fprintf(w.out, "</FORM><BR>\n")
}
// Status bar below captured image
func (w wrpReq) printFooter(h string, s string) {
fmt.Fprintf(w.o, "\n<P><FONT SIZE=\"-2\"><A HREF=\"/?url=https://github.com/tenox7/wrp/&w=%d&h=%d&s=%1.2f&c=%d&t=%s\">"+
fmt.Fprintf(w.out, "\n<P><FONT SIZE=\"-2\"><A HREF=\"/?url=https://github.com/tenox7/wrp/&w=%d&h=%d&s=%1.2f&c=%d&t=%s\">"+
"Web Rendering Proxy Version %s</A> | <A HREF=\"/shutdown/\">Shutdown WRP</A> | "+
"<A HREF=\"/\">Page Height: %s</A> | <A HREF=\"/\">Img Size: %s</A></FONT></BODY>\n</HTML>\n", w.W, w.H, w.S, w.C, w.T, version, h, s)
"<A HREF=\"/\">Page Height: %s</A> | <A HREF=\"/\">Img Size: %s</A></FONT></BODY>\n</HTML>\n", w.width, w.height, w.scale, w.colors, w.imgType, version, h, s)
}
// Process HTTP requests to WRP '/' url
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.r = req
w.o = out
w.req = req
w.out = out
w.parseForm()
if len(w.U) > 4 {
if len(w.url) > 4 {
w.navigate()
w.capture()
} else {
@ -172,8 +172,8 @@ func pageServer(out http.ResponseWriter, req *http.Request) {
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]
w.r = req
w.o = out
w.req = req
w.out = out
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)
@ -182,14 +182,14 @@ func mapServer(out http.ResponseWriter, req *http.Request) {
if !nodel {
defer delete(ismap, req.URL.Path)
}
n, err := fmt.Sscanf(req.URL.RawQuery, "%d,%d", &w.X, &w.Y)
n, err := fmt.Sscanf(req.URL.RawQuery, "%d,%d", &w.mouseX, &w.mouseY)
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 {
if len(w.url) > 4 {
w.navigate()
w.capture()
} else {
@ -242,13 +242,13 @@ func haltServer(out http.ResponseWriter, req *http.Request) {
func (w wrpReq) navigate() {
var err error
// Mouse Click
if w.X > 0 && w.Y > 0 {
log.Printf("%s Mouse Click %d,%d\n", w.r.RemoteAddr, w.X, w.Y)
err = chromedp.Run(ctx, chromedp.MouseClickXY(float64(w.X)/float64(w.S), float64(w.Y)/float64(w.S)))
if w.mouseX > 0 && w.mouseY > 0 {
log.Printf("%s Mouse Click %d,%d\n", w.req.RemoteAddr, w.mouseX, w.mouseY)
err = chromedp.Run(ctx, chromedp.MouseClickXY(float64(w.mouseX)/float64(w.scale), float64(w.mouseY)/float64(w.scale)))
// Buttons
} else if len(w.F) > 0 {
log.Printf("%s Button %v\n", w.r.RemoteAddr, w.F)
switch w.F {
} else if len(w.buttons) > 0 {
log.Printf("%s Button %v\n", w.req.RemoteAddr, w.buttons)
switch w.buttons {
case "Bk":
err = chromedp.Run(ctx, chromedp.NavigateBack())
case "Bs":
@ -265,22 +265,22 @@ func (w wrpReq) navigate() {
err = chromedp.Run(ctx, chromedp.KeyEvent("\u0303"))
}
// Keys
} else if len(w.K) > 0 {
log.Printf("%s Sending Keys: %#v\n", w.r.RemoteAddr, w.K)
err = chromedp.Run(ctx, chromedp.KeyEvent(w.K))
} else if len(w.keys) > 0 {
log.Printf("%s Sending Keys: %#v\n", w.req.RemoteAddr, w.keys)
err = chromedp.Run(ctx, chromedp.KeyEvent(w.keys))
// Navigate to URL
} else {
log.Printf("%s Processing Capture Request for %s\n", w.r.RemoteAddr, w.U)
err = chromedp.Run(ctx, chromedp.Navigate(w.U))
log.Printf("%s Processing Capture Request for %s\n", w.req.RemoteAddr, w.url)
err = chromedp.Run(ctx, chromedp.Navigate(w.url))
}
if err != nil {
if err.Error() == "context canceled" {
log.Printf("%s Contex cancelled, try again", w.r.RemoteAddr)
fmt.Fprintf(w.o, "<BR>%s<BR> -- restarting, try again", err)
log.Printf("%s Contex cancelled, try again", w.req.RemoteAddr)
fmt.Fprintf(w.out, "<BR>%s<BR> -- restarting, try again", err)
ctx, cancel = chromedp.NewContext(context.Background())
} else {
log.Printf("%s %s", w.r.RemoteAddr, err)
fmt.Fprintf(w.o, "<BR>%s<BR>", err)
log.Printf("%s %s", w.req.RemoteAddr, err)
fmt.Fprintf(w.out, "<BR>%s<BR>", err)
}
return
}
@ -294,9 +294,9 @@ func (w wrpReq) capture() {
var h int64
var pngcap []byte
chromedp.Run(ctx,
emulation.SetDeviceMetricsOverride(int64(float64(w.W)/w.S), 10, w.S, false),
emulation.SetDeviceMetricsOverride(int64(float64(w.width)/w.scale), 10, w.scale, false),
chromedp.Sleep(time.Second*2),
chromedp.Location(&w.U),
chromedp.Location(&w.url),
chromedp.ComputedStyle("body", &styles, chromedp.ByQuery),
chromedp.ActionFunc(func(ctx context.Context) error {
_, _, s, err := page.GetLayoutMetrics().Do(ctx)
@ -311,56 +311,57 @@ func (w wrpReq) capture() {
fmt.Sscanf(style.Value, "rgb(%d,%d,%d)", &r, &g, &b)
}
}
log.Printf("%s Landed on: %s, Height: %v\n", w.r.RemoteAddr, w.U, h)
log.Printf("%s Landed on: %s, Height: %v\n", w.req.RemoteAddr, w.url, h)
w.printPage(fmt.Sprintf("#%02X%02X%02X", r, g, b))
if w.H == 0 && h > 0 {
chromedp.Run(ctx, emulation.SetDeviceMetricsOverride(int64(float64(w.W)/w.S), h+30, w.S, false))
if w.height == 0 && h > 0 {
chromedp.Run(ctx, emulation.SetDeviceMetricsOverride(int64(float64(w.width)/w.scale), h+30, w.scale, false))
} else {
chromedp.Run(ctx, emulation.SetDeviceMetricsOverride(int64(float64(w.W)/w.S), int64(float64(w.H)/w.S), w.S, false))
chromedp.Run(ctx, emulation.SetDeviceMetricsOverride(int64(float64(w.width)/w.scale), int64(float64(w.height)/w.scale), w.scale, false))
}
err = chromedp.Run(ctx, chromedp.CaptureScreenshot(&pngcap))
if err != nil {
log.Printf("%s Failed to capture screenshot: %s\n", w.r.RemoteAddr, err)
fmt.Fprintf(w.o, "<BR>Unable to capture screenshot:<BR>%s<BR>\n", err)
// TODO: process context cancelled here
log.Printf("%s Failed to capture screenshot: %s\n", w.req.RemoteAddr, err)
fmt.Fprintf(w.out, "<BR>Unable to capture screenshot:<BR>%s<BR>\n", err)
return
}
seq := rand.Intn(9999)
imgpath := fmt.Sprintf("/img/%04d.%s", seq, w.T)
imgpath := fmt.Sprintf("/img/%04d.%s", seq, w.imgType)
mappath := fmt.Sprintf("/map/%04d.map", seq)
ismap[mappath] = w
var ssize string
var sw, sh int
if w.T == "gif" {
if w.imgType == "gif" {
i, err := png.Decode(bytes.NewReader(pngcap))
if err != nil {
log.Printf("%s Failed to decode screenshot: %s\n", w.r.RemoteAddr, err)
fmt.Fprintf(w.o, "<BR>Unable to decode page screenshot:<BR>%s<BR>\n", err)
log.Printf("%s Failed to decode screenshot: %s\n", w.req.RemoteAddr, err)
fmt.Fprintf(w.out, "<BR>Unable to decode page screenshot:<BR>%s<BR>\n", err)
return
}
var gifbuf bytes.Buffer
err = gif.Encode(&gifbuf, i, &gif.Options{NumColors: int(w.C), Quantizer: quantize.MedianCutQuantizer{}})
err = gif.Encode(&gifbuf, i, &gif.Options{NumColors: int(w.colors), Quantizer: quantize.MedianCutQuantizer{}})
if err != nil {
log.Printf("%s Failed to encode GIF: %s\n", w.r.RemoteAddr, err)
fmt.Fprintf(w.o, "<BR>Unable to encode GIF:<BR>%s<BR>\n", err)
log.Printf("%s Failed to encode GIF: %s\n", w.req.RemoteAddr, err)
fmt.Fprintf(w.out, "<BR>Unable to encode GIF:<BR>%s<BR>\n", err)
return
}
img[imgpath] = gifbuf
ssize = fmt.Sprintf("%.1f MB", float32(len(gifbuf.Bytes()))/1024.0/1024.0)
sw = i.Bounds().Max.X
sh = i.Bounds().Max.Y
log.Printf("%s Encoded GIF image: %s, Size: %s, Colors: %d, %dx%d\n", w.r.RemoteAddr, imgpath, ssize, w.C, sw, sh)
} else if w.T == "png" {
log.Printf("%s Encoded GIF image: %s, Size: %s, Colors: %d, %dx%d\n", w.req.RemoteAddr, imgpath, ssize, w.colors, sw, sh)
} else if w.imgType == "png" {
pngbuf := bytes.NewBuffer(pngcap)
img[imgpath] = *pngbuf
cfg, _, _ := image.DecodeConfig(pngbuf)
ssize = fmt.Sprintf("%.1f MB", float32(len(pngbuf.Bytes()))/1024.0/1024.0)
sw = cfg.Width
sh = cfg.Height
log.Printf("%s Got PNG image: %s, Size: %s, %dx%d\n", w.r.RemoteAddr, imgpath, ssize, sw, sh)
log.Printf("%s Got PNG image: %s, Size: %s, %dx%d\n", w.req.RemoteAddr, imgpath, ssize, sw, sh)
}
fmt.Fprintf(w.o, "<A HREF=\"%s\"><IMG SRC=\"%s\" BORDER=\"0\" ALT=\"Url: %s, Size: %s\" WIDTH=\"%d\" HEIGHT=\"%d\" ISMAP></A>", mappath, imgpath, w.U, ssize, sw, sh)
fmt.Fprintf(w.out, "<A HREF=\"%s\"><IMG SRC=\"%s\" BORDER=\"0\" ALT=\"Url: %s, Size: %s\" WIDTH=\"%d\" HEIGHT=\"%d\" ISMAP></A>", mappath, imgpath, w.url, ssize, sw, sh)
w.printFooter(fmt.Sprintf("%d PX", h), ssize)
log.Printf("%s Done with caputure for %s\n", w.r.RemoteAddr, w.U)
log.Printf("%s Done with caputure for %s\n", w.req.RemoteAddr, w.url)
}
// Main...