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This commit is contained in:
Antoni Sawicki 2019-06-25 17:07:43 -07:00
parent 1f5592cbde
commit dedf7479b8
1 changed files with 65 additions and 87 deletions
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152
wrp.go
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@ -21,6 +21,9 @@ import (
"strconv" "strconv"
"strings" "strings"
"time" "time"
"encoding/json"
"encoding/base64"
"net"
"github.com/chromedp/cdproto/emulation" "github.com/chromedp/cdproto/emulation"
"github.com/chromedp/cdproto/runtime" "github.com/chromedp/cdproto/runtime"
@ -31,76 +34,82 @@ import (
"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 = "3.0"
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)
) )
func pageServer(out http.ResponseWriter, req *http.Request) { // Params - Page Configuration Parameters
req.ParseForm() type Params struct {
u := req.FormValue("url") U string // url
P int64 // page
W int64 // width
H int64 // height
S float64 // scale
C int64 // #colors
r string // remote addr
l string // local addr
}
p, _ := strconv.ParseInt(req.FormValue("p"), 10, 64) func (p *Params) parseParams(req *http.Request) {
req.ParseForm()
p.r = string(req.RemoteAddr)
p.l = req.Context().Value(http.LocalAddrContextKey).(*net.TCPAddr).IP.String()
p.U = req.FormValue("url")
var x,y int64
fmt.Sscanf(req.URL.RawQuery, "%d,%d", &x, &y)
log.Printf("%s Page Request for %s url=\"%s\" [%+v]\n", req.RemoteAddr, req.URL.Path, p.U, req.URL.RawQuery)
if len(p.U) > 1 && !strings.HasPrefix(p.U, "http") {
p.U = fmt.Sprintf("http://www.google.com/search?q=%s", url.QueryEscape(p.U))
}
p.P, _ = strconv.ParseInt(req.FormValue("p"), 10, 64)
if req.FormValue("pg") == "Dn" { if req.FormValue("pg") == "Dn" {
p++ p.P++
} else if req.FormValue("pg") == "Up" { } else if req.FormValue("pg") == "Up" {
p-- p.P--
} else { } else {
p = 0 p.P = 0
} }
w, _ := strconv.ParseInt(req.FormValue("w"), 10, 64) p.W, _ = strconv.ParseInt(req.FormValue("w"), 10, 64)
if w < 10 { if p.P < 10 {
w = 1024 p.P = 1024
} }
h, _ := strconv.ParseInt(req.FormValue("h"), 10, 64) p.H, _ = strconv.ParseInt(req.FormValue("h"), 10, 64)
if h < 10 { if p.H < 10 {
h = 768 p.H = 768
} }
s, _ := strconv.ParseFloat(req.FormValue("s"), 64) p.S, _ = strconv.ParseFloat(req.FormValue("s"), 64)
if s < 0.1 { if p.S < 0.1 {
s = 1.0 p.S = 1.0
} }
c, _ := strconv.ParseInt(req.FormValue("c"), 10, 64) p.C, _ = strconv.ParseInt(req.FormValue("c"), 10, 64)
if c < 2 || c > 256 { if p.C < 2 || p.C > 256 {
c = 256 p.C = 256
} }
log.Printf("%s Page Request for url=\"%s\" [%s] [%+v]\n", req.RemoteAddr, u, req.URL.Path, req.URL.RawQuery) m, _ := json.Marshal(*p)
log.Printf("DEBUG: Struct: %+v Json: %s Base64: %s\n", p, string(m), base64.StdEncoding.EncodeToString([]byte(m)))
}
func pageServer(out http.ResponseWriter, req *http.Request) {
var p Params
p.parseParams(req)
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", p.U)
fmt.Fprintf(out, "<FORM ACTION=\"/\"><INPUT TYPE=\"TEXT\" NAME=\"url\" VALUE=\"%s\" SIZE=\"20\">", u) fmt.Fprintf(out, "<FORM ACTION=\"/\"><INPUT TYPE=\"TEXT\" NAME=\"url\" VALUE=\"%s\" SIZE=\"20\">", p.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, "<INPUT TYPE=\"SUBMIT\" NAME=\"pg\" VALUE=\"Up\"> \n")
fmt.Fprintf(out, "<INPUT TYPE=\"TEXT\" NAME=\"p\" VALUE=\"%d\" SIZE=\"2\"> \n", p) fmt.Fprintf(out, "<INPUT TYPE=\"TEXT\" NAME=\"p\" VALUE=\"%d\" SIZE=\"2\"> \n", p.P)
fmt.Fprintf(out, "<INPUT TYPE=\"SUBMIT\" NAME=\"pg\" VALUE=\"Dn\"> \n") fmt.Fprintf(out, "<INPUT TYPE=\"SUBMIT\" NAME=\"pg\" VALUE=\"Dn\"> \n")
fmt.Fprintf(out, "W <INPUT TYPE=\"TEXT\" NAME=\"w\" VALUE=\"%d\" SIZE=\"4\"> \n", w) fmt.Fprintf(out, "W <INPUT TYPE=\"TEXT\" NAME=\"w\" VALUE=\"%d\" SIZE=\"4\"> \n", p.W)
fmt.Fprintf(out, "H <INPUT TYPE=\"TEXT\" NAME=\"h\" VALUE=\"%d\" SIZE=\"4\"> \n", h) fmt.Fprintf(out, "H <INPUT TYPE=\"TEXT\" NAME=\"h\" VALUE=\"%d\" SIZE=\"4\"> \n", p.H)
fmt.Fprintf(out, "S <INPUT TYPE=\"TEXT\" NAME=\"s\" VALUE=\"%1.2f\" SIZE=\"3\"> \n", s) fmt.Fprintf(out, "S <INPUT TYPE=\"TEXT\" NAME=\"s\" VALUE=\"%1.2f\" SIZE=\"3\"> \n", p.S)
fmt.Fprintf(out, "C <INPUT TYPE=\"TEXT\" NAME=\"c\" VALUE=\"%d\" SIZE=\"3\"> \n", c) fmt.Fprintf(out, "C <INPUT TYPE=\"TEXT\" NAME=\"c\" VALUE=\"%d\" SIZE=\"3\"> \n", p.C)
fmt.Fprintf(out, "</FORM><BR>\n") fmt.Fprintf(out, "</FORM><BR>\n")
if len(u) > 1 { 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", p.W, p.H, p.S, p.C, version)
if strings.HasPrefix(u, "http") {
capture(u, w, h, s, int(c), p, req.RemoteAddr, out)
} else {
capture(fmt.Sprintf("http://www.google.com/search?q=%s", url.QueryEscape(u)), w, h, s, int(c), p, req.RemoteAddr, out)
}
} else {
fmt.Fprintf(out, "No URL or search query specified")
}
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)
} }
func imgServer(out http.ResponseWriter, req *http.Request) { func imgServer(out http.ResponseWriter, req *http.Request) {
@ -118,49 +127,20 @@ 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 (p Params) 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, c string, out http.ResponseWriter) {
var nodes []*cdp.Node var nodes []*cdp.Node
var pngbuf []byte var pngbuf []byte
var gifbuf bytes.Buffer var gifbuf bytes.Buffer
var loc string var loc string
var res *runtime.RemoteObject var res *runtime.RemoteObject
log.Printf("%s Processing Capture Request for %s\n", c, gourl) log.Printf("%s Processing Capture Request for %s\n", c, p.U)
// Run ChromeDP Magic // Run ChromeDP Magic
err := chromedp.Run(ctx, err := chromedp.Run(ctx,
emulation.SetDeviceMetricsOverride(int64(float64(w)/s), int64(float64(h)/s), s, false), emulation.SetDeviceMetricsOverride(int64(float64(p.W)/p.S), int64(float64(p.H)/p.S), p.S, false),
chromedp.Navigate(gourl), chromedp.Navigate(p.U),
chromedp.Evaluate(fmt.Sprintf("window.scrollTo(0, %d);", p*int64(float64(h)*float64(0.9))), &res), chromedp.Evaluate(fmt.Sprintf("window.scrollTo(0, %d);", p.P*int64(float64(p.H)*float64(0.9))), &res),
chromedp.Sleep(time.Second*1), chromedp.Sleep(time.Second*1),
chromedp.Location(&loc)) chromedp.Location(&loc))
@ -193,22 +173,21 @@ func capture(gourl string, w int64, h int64, s float64, co int, p int64, c strin
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(p.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
} }
seq := rand.Intn(9999) imgpath := fmt.Sprintf("/img/%04d.gif", rand.Intn(9999))
imgpath := fmt.Sprintf("/img/%04d.gif", seq) log.Printf("%s Encoded GIF image: %s, Size: %dKB, Colors: %d\n", c, imgpath, len(gifbuf.Bytes())/1024, p.C)
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
// Gif location // Gif location
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) 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)
out.(http.Flusher).Flush() out.(http.Flusher).Flush()
log.Printf("%s Done with caputure for %s\n", c, gourl) log.Printf("%s Done with caputure for %s\n", c, p.U)
} }
func haltServer(out http.ResponseWriter, req *http.Request) { func haltServer(out http.ResponseWriter, req *http.Request) {
@ -244,7 +223,6 @@ func main() {
rand.Seed(time.Now().UnixNano()) rand.Seed(time.Now().UnixNano())
http.HandleFunc("/", pageServer) http.HandleFunc("/", pageServer)
http.HandleFunc("/img/", imgServer) http.HandleFunc("/img/", imgServer)
http.HandleFunc("/map/", mapServer)
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)