2019-05-30 01:53:05 +00:00
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//
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// WRP - Web Rendering Proxy
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//
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// Copyright (c) 2013-2018 Antoni Sawicki
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2021-03-08 12:26:09 +00:00
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// Copyright (c) 2019-2021 Google LLC
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2019-05-30 01:53:05 +00:00
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//
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2019-05-29 08:29:01 +00:00
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package main
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import (
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2019-05-30 06:49:39 +00:00
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"bytes"
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2019-05-29 08:52:28 +00:00
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"context"
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2022-03-17 02:27:34 +00:00
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"embed"
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2019-05-29 08:52:28 +00:00
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"flag"
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"fmt"
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2020-10-27 11:35:57 +00:00
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"html/template"
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2019-11-13 08:22:07 +00:00
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"image"
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2019-05-30 06:49:39 +00:00
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"image/gif"
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"image/png"
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2020-10-29 14:16:14 +00:00
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"io/ioutil"
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2019-05-29 08:52:28 +00:00
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"log"
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2019-11-03 23:01:05 +00:00
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"math"
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2019-05-30 09:03:17 +00:00
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"math/rand"
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2019-05-29 08:52:28 +00:00
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"net/http"
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2019-05-30 06:49:39 +00:00
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"net/url"
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2019-07-17 05:29:35 +00:00
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"os"
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"os/signal"
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2019-05-29 08:52:28 +00:00
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"strconv"
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2019-05-31 07:36:53 +00:00
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"strings"
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2019-07-17 05:29:35 +00:00
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"syscall"
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2019-05-29 08:52:28 +00:00
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"time"
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2019-05-29 08:29:01 +00:00
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2020-09-28 19:19:27 +00:00
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"github.com/MaxHalford/halfgone"
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2019-08-13 06:35:29 +00:00
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"github.com/chromedp/cdproto/css"
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2019-05-29 09:39:06 +00:00
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"github.com/chromedp/cdproto/emulation"
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2019-11-03 23:01:05 +00:00
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"github.com/chromedp/cdproto/page"
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2019-05-29 08:52:28 +00:00
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"github.com/chromedp/chromedp"
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2019-06-06 08:06:36 +00:00
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"github.com/ericpauley/go-quantize/quantize"
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2019-05-29 08:29:01 +00:00
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)
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var (
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2021-03-08 12:26:09 +00:00
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version = "4.5.2"
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2020-10-27 11:35:57 +00:00
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srv http.Server
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ctx context.Context
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cancel context.CancelFunc
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img = make(map[string]bytes.Buffer)
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ismap = make(map[string]wrpReq)
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2020-10-31 15:51:20 +00:00
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noDel bool
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defType string
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defGeom geom
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2020-10-27 11:35:57 +00:00
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htmlTmpl *template.Template
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2019-05-29 08:29:01 +00:00
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)
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2022-03-17 02:27:34 +00:00
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// go:embed *.html
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var fs embed.FS
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2019-11-03 23:38:26 +00:00
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type geom struct {
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w int64
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h int64
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c int64
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}
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2020-10-27 11:35:57 +00:00
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// Data for html template
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type uiData struct {
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Version string
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URL string
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2020-10-31 15:51:20 +00:00
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BgColor string
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2020-10-27 11:35:57 +00:00
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NColors int64
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Width int64
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Height int64
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2021-03-08 13:02:22 +00:00
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Zoom float64
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2020-10-27 11:35:57 +00:00
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ImgType string
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2020-10-31 15:51:20 +00:00
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ImgURL string
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2020-10-27 11:35:57 +00:00
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ImgSize string
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ImgWidth int
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ImgHeight int
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2020-10-31 15:51:20 +00:00
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MapURL string
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2020-10-27 11:35:57 +00:00
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PageHeight string
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}
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// Parameters for HTML print function
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type printParams struct {
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2020-10-31 15:51:20 +00:00
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bgColor string
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pageHeight string
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imgSize string
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imgURL string
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mapURL string
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imgWidth int
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imgHeight int
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2020-10-27 11:35:57 +00:00
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}
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2020-04-24 10:06:21 +00:00
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// WRP Request
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2019-07-11 06:58:40 +00:00
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type wrpReq struct {
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2020-04-26 06:56:14 +00:00
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url string // url
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width int64 // width
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height int64 // height
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2021-03-08 13:02:22 +00:00
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zoom float64 // zoom/scale
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2020-04-26 06:56:14 +00:00
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colors int64 // #colors
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mouseX int64 // mouseX
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mouseY int64 // mouseY
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keys string // keys to send
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buttons string // Fn buttons
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imgType string // imgtype
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out http.ResponseWriter
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req *http.Request
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2019-06-26 00:07:43 +00:00
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}
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2019-06-24 07:40:34 +00:00
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2020-04-24 10:06:21 +00:00
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// Parse HTML Form, Process Input Boxes, Etc.
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2020-11-05 15:43:06 +00:00
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func parseForm(w *wrpReq) {
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2020-04-26 06:56:14 +00:00
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w.req.ParseForm()
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w.url = w.req.FormValue("url")
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if len(w.url) > 1 && !strings.HasPrefix(w.url, "http") {
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w.url = fmt.Sprintf("http://www.google.com/search?q=%s", url.QueryEscape(w.url))
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2019-06-26 00:07:43 +00:00
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}
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2020-04-26 06:56:14 +00:00
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w.width, _ = strconv.ParseInt(w.req.FormValue("w"), 10, 64)
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w.height, _ = strconv.ParseInt(w.req.FormValue("h"), 10, 64)
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if w.width < 10 && w.height < 10 {
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2020-10-31 15:51:20 +00:00
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w.width = defGeom.w
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w.height = defGeom.h
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2019-05-29 08:52:28 +00:00
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}
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2021-03-08 13:02:22 +00:00
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w.zoom, _ = strconv.ParseFloat(w.req.FormValue("z"), 64)
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if w.zoom < 0.1 {
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w.zoom = 1.0
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2019-05-31 01:08:48 +00:00
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}
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2020-04-26 06:56:14 +00:00
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w.colors, _ = strconv.ParseInt(w.req.FormValue("c"), 10, 64)
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if w.colors < 2 || w.colors > 256 {
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2020-10-31 15:51:20 +00:00
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w.colors = defGeom.c
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2019-06-03 00:06:41 +00:00
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}
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2020-04-26 06:56:14 +00:00
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w.keys = w.req.FormValue("k")
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w.buttons = w.req.FormValue("Fn")
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w.imgType = w.req.FormValue("t")
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if w.imgType != "gif" && w.imgType != "png" {
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2020-10-31 15:51:20 +00:00
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w.imgType = defType
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2019-11-04 00:58:38 +00:00
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}
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2020-04-26 08:33:20 +00:00
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log.Printf("%s WrpReq from UI Form: %+v\n", w.req.RemoteAddr, w)
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2019-06-26 00:07:43 +00:00
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}
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2020-04-24 10:06:21 +00:00
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// Display WP UI
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2020-11-05 15:43:06 +00:00
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func printHTML(w wrpReq, p printParams) {
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2020-04-26 06:56:14 +00:00
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w.out.Header().Set("Cache-Control", "max-age=0")
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w.out.Header().Set("Expires", "-1")
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w.out.Header().Set("Pragma", "no-cache")
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w.out.Header().Set("Content-Type", "text/html")
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2020-10-27 11:35:57 +00:00
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data := uiData{
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Version: version,
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URL: w.url,
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2020-10-31 15:51:20 +00:00
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BgColor: p.bgColor,
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2020-10-27 11:35:57 +00:00
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Width: w.width,
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Height: w.height,
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NColors: w.colors,
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2021-03-08 13:02:22 +00:00
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Zoom: w.zoom,
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2020-10-27 11:35:57 +00:00
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ImgType: w.imgType,
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2020-10-31 15:51:20 +00:00
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ImgSize: p.imgSize,
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ImgWidth: p.imgWidth,
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ImgHeight: p.imgHeight,
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ImgURL: p.imgURL,
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MapURL: p.mapURL,
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PageHeight: p.pageHeight,
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2019-11-04 01:53:20 +00:00
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}
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2020-10-27 11:35:57 +00:00
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err := htmlTmpl.Execute(w.out, data)
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if err != nil {
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log.Fatal(err)
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2019-11-04 00:58:38 +00:00
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}
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2019-06-26 08:07:13 +00:00
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}
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2020-10-26 08:21:42 +00:00
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// Determine what action to take
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2020-11-05 15:43:06 +00:00
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func action(w wrpReq) chromedp.Action {
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2020-04-24 10:09:20 +00:00
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// Mouse Click
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2020-04-26 06:56:14 +00:00
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if w.mouseX > 0 && w.mouseY > 0 {
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log.Printf("%s Mouse Click %d,%d\n", w.req.RemoteAddr, w.mouseX, w.mouseY)
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2021-03-08 13:02:22 +00:00
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return chromedp.MouseClickXY(float64(w.mouseX)/float64(w.zoom), float64(w.mouseY)/float64(w.zoom))
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2020-10-26 08:21:42 +00:00
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}
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// Buttons
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if len(w.buttons) > 0 {
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2020-04-26 06:56:14 +00:00
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log.Printf("%s Button %v\n", w.req.RemoteAddr, w.buttons)
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switch w.buttons {
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2019-07-13 07:40:56 +00:00
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case "Bk":
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2020-10-26 08:21:42 +00:00
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return chromedp.NavigateBack()
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2021-03-08 12:41:13 +00:00
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case "St":
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return chromedp.Stop()
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case "Re":
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return chromedp.Reload()
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2019-07-13 07:40:56 +00:00
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case "Bs":
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2020-10-26 08:21:42 +00:00
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return chromedp.KeyEvent("\b")
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2019-07-13 07:40:56 +00:00
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case "Rt":
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2020-10-26 08:21:42 +00:00
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return chromedp.KeyEvent("\r")
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2019-07-13 07:40:56 +00:00
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case "<":
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2020-10-26 08:21:42 +00:00
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return chromedp.KeyEvent("\u0302")
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2019-07-13 07:40:56 +00:00
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case "^":
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2020-10-26 08:21:42 +00:00
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return chromedp.KeyEvent("\u0304")
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2019-07-13 07:40:56 +00:00
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case "v":
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2020-10-26 08:21:42 +00:00
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return chromedp.KeyEvent("\u0301")
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2019-07-13 07:40:56 +00:00
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case ">":
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2020-10-26 08:21:42 +00:00
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return chromedp.KeyEvent("\u0303")
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2019-07-13 07:40:56 +00:00
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}
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2020-10-26 08:21:42 +00:00
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}
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// Keys
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if len(w.keys) > 0 {
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2020-04-26 06:56:14 +00:00
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log.Printf("%s Sending Keys: %#v\n", w.req.RemoteAddr, w.keys)
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2020-10-26 08:21:42 +00:00
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return chromedp.KeyEvent(w.keys)
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2019-07-10 08:01:40 +00:00
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}
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2020-10-26 08:21:42 +00:00
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// Navigate to URL
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log.Printf("%s Processing Capture Request for %s\n", w.req.RemoteAddr, w.url)
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return chromedp.Navigate(w.url)
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}
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// Process Keyboard and Mouse events or Navigate to the desired URL.
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2020-11-05 15:43:06 +00:00
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func navigate(w wrpReq) {
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err := chromedp.Run(ctx, action(w))
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2019-05-31 07:41:46 +00:00
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if err != nil {
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2019-06-09 00:32:35 +00:00
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if err.Error() == "context canceled" {
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2020-04-26 06:56:14 +00:00
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log.Printf("%s Contex cancelled, try again", w.req.RemoteAddr)
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fmt.Fprintf(w.out, "<BR>%s<BR> -- restarting, try again", err)
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2019-06-09 00:32:35 +00:00
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ctx, cancel = chromedp.NewContext(context.Background())
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2020-10-26 08:21:42 +00:00
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return
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2019-06-09 00:32:35 +00:00
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}
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2020-10-26 08:21:42 +00:00
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log.Printf("%s %s", w.req.RemoteAddr, err)
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fmt.Fprintf(w.out, "<BR>%s<BR>", err)
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2019-05-31 07:41:46 +00:00
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}
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2020-04-24 09:45:34 +00:00
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}
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2020-04-24 10:06:21 +00:00
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// Capture currently rendered web page to an image and fake ISMAP
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2020-11-05 15:43:06 +00:00
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func capture(w wrpReq) {
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2020-04-24 09:45:34 +00:00
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var err error
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2020-04-23 10:25:39 +00:00
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var styles []*css.ComputedStyleProperty
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2019-08-22 07:38:36 +00:00
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var r, g, b int
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2019-11-03 23:01:05 +00:00
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var h int64
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var pngcap []byte
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2019-08-13 06:35:29 +00:00
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chromedp.Run(ctx,
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2021-03-08 13:02:22 +00:00
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emulation.SetDeviceMetricsOverride(int64(float64(w.width)/w.zoom), 10, w.zoom, false),
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2020-04-26 06:56:14 +00:00
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chromedp.Location(&w.url),
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2019-11-03 23:01:05 +00:00
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chromedp.ComputedStyle("body", &styles, chromedp.ByQuery),
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chromedp.ActionFunc(func(ctx context.Context) error {
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2022-11-06 07:51:44 +00:00
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_, _, _, _, _, s, err := page.GetLayoutMetrics().Do(ctx)
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2019-11-03 23:01:05 +00:00
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if err == nil {
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h = int64(math.Ceil(s.Height))
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}
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return nil
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}),
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2019-07-12 08:51:23 +00:00
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)
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2019-08-13 06:35:29 +00:00
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for _, style := range styles {
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if style.Name == "background-color" {
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fmt.Sscanf(style.Value, "rgb(%d,%d,%d)", &r, &g, &b)
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}
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}
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2020-04-26 06:56:14 +00:00
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log.Printf("%s Landed on: %s, Height: %v\n", w.req.RemoteAddr, w.url, h)
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2021-03-08 13:02:22 +00:00
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height := int64(float64(w.height) / w.zoom)
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2020-04-26 06:56:14 +00:00
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if w.height == 0 && h > 0 {
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2020-10-26 08:49:03 +00:00
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height = h + 30
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2019-11-03 23:01:05 +00:00
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}
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2021-03-08 13:02:22 +00:00
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chromedp.Run(ctx, emulation.SetDeviceMetricsOverride(int64(float64(w.width)/w.zoom), height, w.zoom, false))
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2020-04-26 07:23:31 +00:00
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// Capture screenshot...
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2020-10-27 11:05:17 +00:00
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err = chromedp.Run(ctx,
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2020-10-27 11:39:14 +00:00
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chromedp.Sleep(time.Second*2),
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2020-10-27 11:05:17 +00:00
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chromedp.CaptureScreenshot(&pngcap),
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)
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2019-06-24 07:40:34 +00:00
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if err != nil {
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2020-04-26 07:23:31 +00:00
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if err.Error() == "context canceled" {
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log.Printf("%s Contex cancelled, try again", w.req.RemoteAddr)
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fmt.Fprintf(w.out, "<BR>%s<BR> -- restarting, try again", err)
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ctx, cancel = chromedp.NewContext(context.Background())
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2020-10-26 08:21:42 +00:00
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return
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2020-04-26 07:23:31 +00:00
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}
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2020-10-26 08:21:42 +00:00
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log.Printf("%s Failed to capture screenshot: %s\n", w.req.RemoteAddr, err)
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|
|
fmt.Fprintf(w.out, "<BR>Unable to capture screenshot:<BR>%s<BR>\n", err)
|
2019-06-24 07:40:34 +00:00
|
|
|
return
|
|
|
|
}
|
2019-06-26 08:07:13 +00:00
|
|
|
seq := rand.Intn(9999)
|
2020-04-26 06:56:14 +00:00
|
|
|
imgpath := fmt.Sprintf("/img/%04d.%s", seq, w.imgType)
|
2019-06-26 08:07:13 +00:00
|
|
|
mappath := fmt.Sprintf("/map/%04d.map", seq)
|
2019-07-11 06:58:40 +00:00
|
|
|
ismap[mappath] = w
|
2019-11-04 01:24:18 +00:00
|
|
|
var ssize string
|
2020-10-27 11:35:57 +00:00
|
|
|
var iw, ih int
|
2020-10-26 08:32:09 +00:00
|
|
|
switch w.imgType {
|
|
|
|
case "gif":
|
2019-11-03 07:56:04 +00:00
|
|
|
i, err := png.Decode(bytes.NewReader(pngcap))
|
2019-08-22 07:38:36 +00:00
|
|
|
if err != nil {
|
2020-04-26 06:56:14 +00:00
|
|
|
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)
|
2019-08-22 07:38:36 +00:00
|
|
|
return
|
|
|
|
}
|
2020-09-28 19:19:27 +00:00
|
|
|
if w.colors == 2 {
|
|
|
|
gray := halfgone.ImageToGray(i)
|
|
|
|
i = halfgone.FloydSteinbergDitherer{}.Apply(gray)
|
|
|
|
}
|
2019-08-22 07:38:36 +00:00
|
|
|
var gifbuf bytes.Buffer
|
2022-11-06 07:27:10 +00:00
|
|
|
st := time.Now()
|
2020-04-26 06:56:14 +00:00
|
|
|
err = gif.Encode(&gifbuf, i, &gif.Options{NumColors: int(w.colors), Quantizer: quantize.MedianCutQuantizer{}})
|
2019-08-22 07:38:36 +00:00
|
|
|
if err != nil {
|
2020-04-26 06:56:14 +00:00
|
|
|
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)
|
2019-08-22 07:38:36 +00:00
|
|
|
return
|
|
|
|
}
|
2019-11-03 07:56:04 +00:00
|
|
|
img[imgpath] = gifbuf
|
2020-04-26 08:25:28 +00:00
|
|
|
ssize = fmt.Sprintf("%.0f KB", float32(len(gifbuf.Bytes()))/1024.0)
|
2020-10-27 11:35:57 +00:00
|
|
|
iw = i.Bounds().Max.X
|
|
|
|
ih = i.Bounds().Max.Y
|
2022-11-06 07:27:10 +00:00
|
|
|
log.Printf("%s Encoded GIF image: %s, Size: %s, Colors: %d, %dx%d, Time: %vms\n", w.req.RemoteAddr, imgpath, ssize, w.colors, iw, ih, time.Since(st).Milliseconds())
|
2020-10-26 08:32:09 +00:00
|
|
|
case "png":
|
2019-08-22 07:38:36 +00:00
|
|
|
pngbuf := bytes.NewBuffer(pngcap)
|
2019-11-03 07:56:04 +00:00
|
|
|
img[imgpath] = *pngbuf
|
2019-11-13 08:22:07 +00:00
|
|
|
cfg, _, _ := image.DecodeConfig(pngbuf)
|
2020-04-26 08:25:28 +00:00
|
|
|
ssize = fmt.Sprintf("%.0f KB", float32(len(pngbuf.Bytes()))/1024.0)
|
2020-10-27 11:35:57 +00:00
|
|
|
iw = cfg.Width
|
|
|
|
ih = cfg.Height
|
|
|
|
log.Printf("%s Got PNG image: %s, Size: %s, %dx%d\n", w.req.RemoteAddr, imgpath, ssize, iw, ih)
|
2019-08-22 07:38:36 +00:00
|
|
|
}
|
2020-11-05 15:43:06 +00:00
|
|
|
printHTML(w, printParams{
|
2020-10-31 15:51:20 +00:00
|
|
|
bgColor: fmt.Sprintf("#%02X%02X%02X", r, g, b),
|
|
|
|
pageHeight: fmt.Sprintf("%d PX", h),
|
|
|
|
imgSize: ssize,
|
|
|
|
imgURL: imgpath,
|
|
|
|
mapURL: mappath,
|
|
|
|
imgWidth: iw,
|
|
|
|
imgHeight: ih,
|
2020-10-27 11:35:57 +00:00
|
|
|
})
|
|
|
|
log.Printf("%s Done with capture for %s\n", w.req.RemoteAddr, w.url)
|
2019-05-29 08:29:01 +00:00
|
|
|
}
|
|
|
|
|
2020-11-05 16:05:50 +00:00
|
|
|
// 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.req = req
|
|
|
|
w.out = out
|
|
|
|
parseForm(&w)
|
|
|
|
if len(w.url) < 4 {
|
|
|
|
printHTML(w, printParams{bgColor: "#FFFFFF"})
|
|
|
|
return
|
|
|
|
}
|
|
|
|
navigate(w)
|
|
|
|
capture(w)
|
|
|
|
}
|
|
|
|
|
|
|
|
// Process HTTP requests to ISMAP '/map/' url
|
|
|
|
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.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)
|
|
|
|
return
|
|
|
|
}
|
|
|
|
if !noDel {
|
|
|
|
defer delete(ismap, req.URL.Path)
|
|
|
|
}
|
|
|
|
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.url) < 4 {
|
|
|
|
printHTML(w, printParams{bgColor: "#FFFFFF"})
|
|
|
|
return
|
|
|
|
}
|
|
|
|
navigate(w)
|
|
|
|
capture(w)
|
|
|
|
}
|
|
|
|
|
|
|
|
// Process HTTP requests for images '/img/' url
|
|
|
|
func imgServer(out http.ResponseWriter, req *http.Request) {
|
|
|
|
log.Printf("%s IMG Request for %s\n", req.RemoteAddr, req.URL.Path)
|
|
|
|
imgbuf, ok := img[req.URL.Path]
|
|
|
|
if !ok || imgbuf.Bytes() == nil {
|
|
|
|
fmt.Fprintf(out, "Unable to find image %s\n", req.URL.Path)
|
|
|
|
log.Printf("%s Unable to find image %s\n", req.RemoteAddr, req.URL.Path)
|
|
|
|
return
|
|
|
|
}
|
|
|
|
if !noDel {
|
|
|
|
defer delete(img, req.URL.Path)
|
|
|
|
}
|
|
|
|
switch {
|
|
|
|
case strings.HasPrefix(req.URL.Path, ".gif"):
|
|
|
|
out.Header().Set("Content-Type", "image/gif")
|
|
|
|
case strings.HasPrefix(req.URL.Path, ".png"):
|
|
|
|
out.Header().Set("Content-Type", "image/png")
|
|
|
|
}
|
|
|
|
out.Header().Set("Content-Length", strconv.Itoa(len(imgbuf.Bytes())))
|
|
|
|
out.Header().Set("Cache-Control", "max-age=0")
|
|
|
|
out.Header().Set("Expires", "-1")
|
|
|
|
out.Header().Set("Pragma", "no-cache")
|
|
|
|
out.Write(imgbuf.Bytes())
|
|
|
|
out.(http.Flusher).Flush()
|
|
|
|
}
|
|
|
|
|
|
|
|
// Process HTTP requests for Shutdown via '/shutdown/' url
|
|
|
|
func haltServer(out http.ResponseWriter, req *http.Request) {
|
|
|
|
log.Printf("%s Shutdown Request for %s\n", req.RemoteAddr, req.URL.Path)
|
|
|
|
out.Header().Set("Cache-Control", "max-age=0")
|
|
|
|
out.Header().Set("Expires", "-1")
|
|
|
|
out.Header().Set("Pragma", "no-cache")
|
|
|
|
out.Header().Set("Content-Type", "text/plain")
|
|
|
|
fmt.Fprintf(out, "Shutting down WRP...\n")
|
|
|
|
out.(http.Flusher).Flush()
|
|
|
|
time.Sleep(time.Second * 2)
|
|
|
|
cancel()
|
|
|
|
srv.Shutdown(context.Background())
|
|
|
|
os.Exit(1)
|
|
|
|
}
|
|
|
|
|
2020-11-05 15:43:06 +00:00
|
|
|
// returns html template, either from html file or built-in
|
2020-10-29 14:16:14 +00:00
|
|
|
func tmpl(t string) string {
|
|
|
|
var tmpl []byte
|
|
|
|
fh, err := os.Open(t)
|
|
|
|
if err != nil {
|
|
|
|
goto statik
|
|
|
|
}
|
|
|
|
tmpl, err = ioutil.ReadAll(fh)
|
|
|
|
if err != nil {
|
|
|
|
goto statik
|
|
|
|
}
|
|
|
|
log.Printf("Got UI template from %v file\n", t)
|
|
|
|
return string(tmpl)
|
|
|
|
|
|
|
|
statik:
|
2022-03-17 02:27:34 +00:00
|
|
|
fhs, err := fs.Open("/wrp.html")
|
2020-10-29 14:16:14 +00:00
|
|
|
if err != nil {
|
|
|
|
log.Fatal(err)
|
|
|
|
}
|
|
|
|
|
|
|
|
tmpl, err = ioutil.ReadAll(fhs)
|
|
|
|
if err != nil {
|
|
|
|
log.Fatal(err)
|
|
|
|
}
|
|
|
|
log.Printf("Got UI template from built-in\n")
|
|
|
|
return string(tmpl)
|
|
|
|
}
|
|
|
|
|
2020-04-24 10:06:21 +00:00
|
|
|
// Main...
|
2019-05-29 08:29:01 +00:00
|
|
|
func main() {
|
2021-03-08 12:26:09 +00:00
|
|
|
var addr, fgeom, tHTML string
|
2020-10-26 08:37:25 +00:00
|
|
|
var headless bool
|
2019-06-04 00:50:16 +00:00
|
|
|
var debug bool
|
2019-11-03 23:38:26 +00:00
|
|
|
var err error
|
2019-05-29 08:52:28 +00:00
|
|
|
flag.StringVar(&addr, "l", ":8080", "Listen address:port, default :8080")
|
2020-10-26 08:37:25 +00:00
|
|
|
flag.BoolVar(&headless, "h", true, "Headless mode - hide browser window")
|
2019-06-04 00:50:16 +00:00
|
|
|
flag.BoolVar(&debug, "d", false, "Debug ChromeDP")
|
2020-10-31 15:51:20 +00:00
|
|
|
flag.BoolVar(&noDel, "n", false, "Do not free maps and images after use")
|
|
|
|
flag.StringVar(&defType, "t", "gif", "Image type: gif|png")
|
2019-11-03 23:38:26 +00:00
|
|
|
flag.StringVar(&fgeom, "g", "1152x600x256", "Geometry: width x height x colors, height can be 0 for unlimited")
|
2021-03-08 12:26:09 +00:00
|
|
|
flag.StringVar(&tHTML, "ui", "wrp.html", "HTML template file for the UI")
|
2019-05-29 08:52:28 +00:00
|
|
|
flag.Parse()
|
2020-04-27 08:05:02 +00:00
|
|
|
if len(os.Getenv("PORT")) > 0 {
|
|
|
|
addr = ":" + os.Getenv(("PORT"))
|
|
|
|
}
|
2020-10-31 15:51:20 +00:00
|
|
|
n, err := fmt.Sscanf(fgeom, "%dx%dx%d", &defGeom.w, &defGeom.h, &defGeom.c)
|
2019-11-03 23:38:26 +00:00
|
|
|
if err != nil || n != 3 {
|
|
|
|
log.Fatalf("Unable to parse -g geometry flag / %s", err)
|
|
|
|
}
|
2020-11-05 16:05:50 +00:00
|
|
|
|
2019-06-04 00:50:16 +00:00
|
|
|
opts := append(chromedp.DefaultExecAllocatorOptions[:],
|
2019-06-04 07:58:45 +00:00
|
|
|
chromedp.Flag("headless", headless),
|
2019-07-11 06:58:40 +00:00
|
|
|
chromedp.Flag("hide-scrollbars", false),
|
2019-06-04 00:50:16 +00:00
|
|
|
)
|
2019-07-17 05:29:35 +00:00
|
|
|
actx, acancel := chromedp.NewExecAllocator(context.Background(), opts...)
|
|
|
|
defer acancel()
|
2019-06-04 00:50:16 +00:00
|
|
|
if debug {
|
2019-06-04 08:23:46 +00:00
|
|
|
ctx, cancel = chromedp.NewContext(actx, chromedp.WithDebugf(log.Printf))
|
2019-06-04 00:50:16 +00:00
|
|
|
} else {
|
2019-06-04 08:23:46 +00:00
|
|
|
ctx, cancel = chromedp.NewContext(actx)
|
2019-06-04 00:50:16 +00:00
|
|
|
}
|
|
|
|
defer cancel()
|
2020-11-05 16:05:50 +00:00
|
|
|
|
2019-05-30 09:03:17 +00:00
|
|
|
rand.Seed(time.Now().UnixNano())
|
2020-11-05 16:05:50 +00:00
|
|
|
|
2019-07-17 05:29:35 +00:00
|
|
|
c := make(chan os.Signal)
|
|
|
|
signal.Notify(c, os.Interrupt, syscall.SIGTERM)
|
|
|
|
go func() {
|
|
|
|
<-c
|
|
|
|
log.Printf("Interrupt - shutting down.")
|
|
|
|
cancel()
|
|
|
|
srv.Shutdown(context.Background())
|
|
|
|
os.Exit(1)
|
|
|
|
}()
|
2020-11-05 16:05:50 +00:00
|
|
|
|
2019-05-29 08:52:28 +00:00
|
|
|
http.HandleFunc("/", pageServer)
|
2019-06-26 08:07:13 +00:00
|
|
|
http.HandleFunc("/map/", mapServer)
|
2019-05-30 09:03:17 +00:00
|
|
|
http.HandleFunc("/img/", imgServer)
|
2019-06-18 06:53:22 +00:00
|
|
|
http.HandleFunc("/shutdown/", haltServer)
|
2019-05-30 01:47:03 +00:00
|
|
|
http.HandleFunc("/favicon.ico", http.NotFound)
|
2020-11-05 16:05:50 +00:00
|
|
|
|
2019-06-02 23:24:46 +00:00
|
|
|
log.Printf("Web Rendering Proxy Version %s\n", version)
|
2020-04-27 19:29:18 +00:00
|
|
|
log.Printf("Args: %q", os.Args)
|
2020-10-31 15:51:20 +00:00
|
|
|
log.Printf("Default Img Type: %v, Geometry: %+v", defType, defGeom)
|
2020-11-05 16:05:50 +00:00
|
|
|
|
2021-03-08 12:26:09 +00:00
|
|
|
htmlTmpl, err = template.New("wrp.html").Parse(tmpl(tHTML))
|
2020-10-29 14:16:14 +00:00
|
|
|
if err != nil {
|
|
|
|
log.Fatal(err)
|
|
|
|
}
|
2020-11-05 16:05:50 +00:00
|
|
|
|
2019-05-31 06:40:43 +00:00
|
|
|
log.Printf("Starting WRP http server on %s\n", addr)
|
2019-06-18 06:53:22 +00:00
|
|
|
srv.Addr = addr
|
2019-11-03 23:38:26 +00:00
|
|
|
err = srv.ListenAndServe()
|
2019-06-18 06:53:22 +00:00
|
|
|
if err != nil {
|
|
|
|
log.Fatal(err)
|
|
|
|
}
|
2019-05-29 08:29:01 +00:00
|
|
|
}
|