bump ver

Add PgUp, PgDn, and Select All buttons

Dockerfile

@@ -1,5 +1,14 @@
+FROM golang AS builder
+WORKDIR /src
+RUN git clone https://github.com/tenox7/wrp.git
+WORKDIR /src/wrp
+RUN go mod download
+ARG TARGETARCH
+RUN CGO_ENABLED=0 GOOS=linux GOARCH=${TARGETARCH} go build -o /wrp-${TARGETARCH}
+
 FROM chromedp/headless-shell
-ADD wrp /wrp
+ARG TARGETARCH
+COPY --from=builder /wrp-${TARGETARCH} /wrp
 ENTRYPOINT ["/wrp"]
 ENV PATH="/headless-shell:${PATH}"
 LABEL maintainer="as@tenoware.com"

Dockerfile.local

@@ -0,0 +1,6 @@
+FROM chromedp/headless-shell
+ARG TARGETARCH
+ADD wrp-${TARGETARCH}-linux /wrp
+ENTRYPOINT ["/wrp"]
+ENV PATH="/headless-shell:${PATH}"
+LABEL maintainer="as@tenoware.com"

Makefile

@@ -1,28 +1,28 @@
 all: wrp
 
 wrp: wrp.go
-	go build wrp.go
+	go build -a
 
 cross:
-	GOOS=linux GOARCH=amd64 go build -a -o wrp-amd64-linux wrp.go
-	GOOS=freebsd GOARCH=amd64 go build -a -o wrp-amd64-freebsd wrp.go
-	GOOS=openbsd GOARCH=amd64 go build -a -o wrp-amd64-openbsd wrp.go
-	GOOS=darwin GOARCH=amd64 go build -a -o wrp-amd64-macos wrp.go
-	GOOS=darwin GOARCH=arm64 go build -a -o wrp-arm64-macos wrp.go
-	GOOS=windows GOARCH=amd64 go build -a -o wrp-amd64-windows.exe wrp.go
-	GOOS=windows GOARCH=386 go build -a -o wrp-386-windows.exe wrp.go
-	GOOS=linux GOARCH=arm go build -a -o wrp-arm-linux wrp.go
-	GOOS=linux GOARCH=arm64 go build -a -o wrp-arm64-linux wrp.go
+	GOOS=linux GOARCH=amd64 go build -a -o wrp-amd64-linux
+	GOOS=freebsd GOARCH=amd64 go build -a -o wrp-amd64-freebsd
+	GOOS=openbsd GOARCH=amd64 go build -a -o wrp-amd64-openbsd
+	GOOS=darwin GOARCH=amd64 go build -a -o wrp-amd64-macos
+	GOOS=darwin GOARCH=arm64 go build -a -o wrp-arm64-macos
+	GOOS=windows GOARCH=amd64 go build -a -o wrp-amd64-windows.exe
+	GOOS=linux GOARCH=arm go build -a -o wrp-arm-linux
+	GOOS=linux GOARCH=arm64 go build -a -o wrp-arm64-linux
 
-docker: wrp
-	docker build -t tenox7/wrp:latest .
+docker-local:
+	GOOS=linux GOARCH=amd64 go build -a -o wrp-amd64-linux
+	GOOS=linux GOARCH=arm64 go build -a -o wrp-arm64-linux
+	docker buildx build --platform linux/amd64,linux/arm64 -t tenox7/wrp:latest -f Dockerfile.local --load .
 
-dockerhub:
-	docker push tenox7/wrp:latest
+docker-push:
+	docker buildx build --platform linux/amd64,linux/arm64 -t tenox7/wrp:latest --push .
 
-gcrio:
-	docker tag tenox7/wrp:latest gcr.io/tenox7/wrp
-	docker push gcr.io/tenox7/wrp
+docker-clean:
+	docker buildx prune -a -f
 
 clean:
 	rm -rf wrp-* wrp

README.md

@@ -1,124 +1,207 @@
 # WRP - Web Rendering Proxy
 
-A browser-in-browser "proxy" server that allows to use historical / vintage web browsers on the modern web. It works by rendering a web page in to a GIF or PNG image with clickable imagemap.
+A browser-in-browser "proxy" server that allows to use historical / vintage web browsers on the modern web. It has two modes:
+
+- ISMAP "graphical" mode, renders web page in to a GIF, PNG or JPG image with clickable imagemap.
+- Simple HTML "text" mode converts web page in to Markdown, then renders it into simplified HTML for old browsers.
 
 ![Internet Explorer 1.5 doing Gmail](wrp.png)
 
-## Usage
+## Usage Instructions
+
+* [Download a WRP binary](https://github.com/tenox7/wrp/releases/) run it on a machine that will become your WRP gateway/server. This should be modern hardware and OS. Google Chrome / Chromium Browser is required to be preinstalled. Do not try to run WRP on an old machine like Windows XP or 98.
+* Make sure you have disabled firewall or open port WRP is listening on (by default 8080).
+* Point your legacy browser to `http://address:port` of the WRP server. Do not set or use it as a "proxy server".
+* Type a search string or a full http/https URL and click **Go**.
+* Select whether you want to use graphical (ISMAP) or simple HTML mode.
+
+### Image Map Mode
 
-* [Download a WRP binary](https://github.com/tenox7/wrp/releases/) and run it on a machine that will become your WRP gateway/server. 
-This machine should be pretty modern, high spec and Google Chrome / Chromium Browser is required to be preinstalled.
-* Point your legacy browser to `http://address:port` of WRP server. Do not set or use it as a "proxy server".
-* Type a search string or a http/https URL and click **Go**.
 * Adjust your screen **W**idth/**H**eight/**S**cale/**C**olors to fit in your old browser.
-* Scroll web page by clicking on the in-image scroll bar.
+* Scroll web page by clicking on the in-image scroll bar on the right.
+* WRP also allows **a single tall image without the vertical scrollbar** and use client scrolling. To enable this, simply height **H** to `0` (or flag `-g 1152x0x216`. However this should not be used with old and low spec clients. Such tall images will be very large, take a lot of memory and long time to process, especially for GIFs.
 * Do not use client browser history-back, instead use **Bk** button in the app.
+* You can re-capture screenshot without reloading page by using **St** (Stop). This is useful if page didn't render fully before screenshot is taken.
+* You can also reload page and re-capture screenshot with **Re** (Reload).
 * To send keystrokes, fill **K** input box and press **Go**. There also are buttons for backspace, enter and arrow keys.
-* You can set height **H** to `0` to render pages in to **a single tall image without the vertical scrollbar** and use client scrolling. However this should not be used with old and low spec clients. Such tall images will be very large and take long time to process, especially for GIFs.
-* Prefer PNG over GIF if your browser supports it. PNG is much faster, whereas GIF requires a lot of additional processing on both client and server.
-* You can re-capture page screenshot without reloading by using **St** (Stop).
-* You can also reload and re-capture current page with **Re** (Reload).
+* The default image type GIP is a ultra fast, optimized, parallel encoded GIF type.
+* If your browser supports it, prefer PNG over GIF/JPG. PNG is much faster, whereas GIF/JPG requires a lot of additional processing on both client and server to encode/decode.
+* GIF images are by default encoded with 216 colors, "web safe" palette. This uses an ultra fast but not very accurate color mapping algorithm. If you want better color representation switch to 256 color mode.
 
-## Customization
+### Simple HTML mode
 
-Since 4.5.1 WRP supports customizing it's own UI using HTML Template file. Download [wrp.html](wrp.html) place in the same directory with wrp binary customize it to your liking.
-
-## Docker
-
-```shell
-$ docker run -d -p 80:8080 tenox7/wrp
-```
-
-## Google Cloud Run
-
-```shell
-$ gcloud run deploy --platform managed --image=gcr.io/tenox7/wrp:latest --memory=2Gi --args='-t=png','-g=1280x0x256'
-```
-
-Or from [Gcloud Console](https://console.cloud.google.com/run). Use `gcr.io/tenox7/wrp:latest` as container image URL.
-
-Note that unfortunately GCR forces https. Your browser support of encryption protocols and certification authorities will vary. 
-
-## Azure Container Instances
-
-```shell
-$ az container create --resource-group wrp --name wrp --image gcr.io/tenox7/wrp:latest --cpu 1 --memory 2 --ports 80 --protocol tcp --os-type Linux --ip-address Public --command-line '/wrp -l :80 -t png -g 1280x0x256'
-```
-
-Or from the [Azure Console](https://portal.azure.com/#create/Microsoft.ContainerInstances). Use `gcr.io/tenox7/wrp:latest` or `tenox7/wrp:latest` for image name.
-
-Fortunately ACI allows port 80 without encryption.
-
-
-## Flags
-
-```
--l  listen address:port (default :8080)
--t  image type gif or png (default gif) 
--g  image geometry, WxHxC, height can be 0 for unlimited (default 1152x600x256)
--h  headless mode, hide browser window on the server (default true)
--d  chromedp debug logging (default false)
--n  do not free maps and gif images after use (default false)
-```
+* Select image type PNG/GIF/JPG. Each individual image from the original web site will be converted to the selected format.
+* Type maximum image size in pixels.
 
 ## UI explanation
 
 The first unnamed input box is either search (google) or URL starting with http/https
 
-**Go** instructs browser to navigate to the url or perform search
+`Go` Navigate to the url or perform search
 
-**Bk** is History Back
+`Bk` History Back
 
-**St** is Stop, also re-capture screenshot without refreshing page, for example if page
-render takes a long time or it changes periodically
+`St` Stop, also re-capture screenshot without refreshing page, for example if page
+render takes a long time or it updates / changes periodically
 
-**Re** is Reload
+`Re` Remote Reload / Refresh
 
-**W** is width in pixels, adjust it to get rid of horizontal scroll bar
+`Up` Page Up
 
-**H** is height in pixels, adjust it to get rid of vertical scroll bar.
+`Dn` Page Down
+
+`W` is width in pixels, adjust it to get rid of horizontal scroll bar
+
+`H` is height in pixels, adjust it to get rid of vertical scroll bar.
 It can also be set to 0 to produce one very tall image and use
 client scroll. This 0 size is experimental, buggy and should be
 used with PNG and lots of memory on a client side.
 
-**Z** is zoom or scale
+`Z` Zoom or scale
 
-**C** is colors, for GIF images only (unused in PNG)
+`M` Mode - ISMAP (clickable imagemap) or simple HTML mode
 
-**K** is keystroke input, you can type some letters in it and when you click Go it will be typed in the remote browser.
+`T` Image type PNG / GIF / JPEG
 
-**Bs** is backspace
+`C` Colors, for GIF images only
 
-**Rt** is return / enter
+`K` Keystroke input, you can type some letters in it and when you click Go it will be typed in the remote browser.
 
-**< ^ v >** are arrow keys, typically for navigating a map, buggy.
+`Bs` Backspace
+
+`Rt` Return / enter
+
+### UI Customization
+
+WRP supports customizing it's own UI using HTML Template file. Download [wrp.html](wrp.html) place in the same directory with wrp binary customize it to your liking.
+
+## Docker
+
+https://hub.docker.com/r/tenox7/wrp
+
+```shell
+$ docker run -d --rm -p 8080:8080 tenox7/wrp:latest
+```
+
+## AWS
+
+It's possible to run WRP on AWS App Runner.
+
+First you need to upload the Docker image to ECR - [Instructions](https://docs.aws.amazon.com/AmazonECR/latest/userguide/docker-push-ecr-image.html).
+
+Create App Runner service using the uploaded image using the AWS Console or CLI.
+
+[AWS Console](https://console.aws.amazon.com/apprunner/home#/create)
+
+```shell
+aws apprunner create-service --service-name my-app-runner-service --source-configuration '{
+    "ImageRepository": {
+        "ImageIdentifier": "<account_id>.dkr.ecr.<region>.amazonaws.com/wrp:latest",
+        "ImageRepositoryType": "ECR",
+        "ImageConfiguration": {"Port": "8000"},
+        "AutoDeploymentsEnabled": true
+    }
+}' --instance-configuration '{
+    "Cpu": "1024",
+    "Memory": "2048",
+    "InstanceRoleArn": "arn:aws:iam::<account_id>:role/AppRunnerECRAccessRole"
+}'
+```
+
+## Azure Container Instances
+
+[Azure Console](https://portal.azure.com/#create/Microsoft.ContainerInstances)
+
+CLI:
+
+```shell
+$ az container create --resource-group wrp --name wrp --image tenox7/wrp:latest --cpu 1 --memory 2 --ports 80 --protocol tcp --os-type Linux --ip-address Public --command-line '/wrp -l :80 -t png -g 1280x0x256'
+```
+
+## Google Cloud Run
+
+```shell
+$ gcloud run deploy --platform managed --image=tenox7/wrp:latest --memory=2Gi --args='-t=png','-g=1280x0x256'
+```
+
+Unfortunately Google Cloud Run forces you to use HTTPS, which likely won't work with old browsers.
+
+
+## Flags
+
+```text
+-l   listen address:port (default :8080)
+-m   mode, either ismap (graphical) or html
+-t   image type gif, png or jpg (default gif)
+-g   image geometry, WxHxC, height can be 0 for unlimited (default 1152x600x216)
+     C (number of colors) is only used for GIF
+-q   Jpeg image quality, default 75%
+-h   headless mode, hide browser window on the server (default true)
+-n   do not free maps and images after use (default false)
+-ui  html template file (default "wrp.html")
+-ua  user agent, override the default "headless" agent (only for ismap mode)
+-s   delay/sleep after page is rendered before screenshot is taken (default 2s)
+-b   browser executable path (e.g., for Brave Browser)
+```
 
 ## Minimal Requirements
 
 * Server/Gateway requires modern hardware and operating system that is supported by [Go language](https://github.com/golang/go/wiki/MinimumRequirements) and Chrome/Chromium Browser, which must be installed.
 * Client Browser needs to support `HTML FORMs` and `ISMAP`. Typically [Mosaic 2.0](http://www.ncsa.illinois.edu/enabling/mosaic/versions) would be minimum version for forms. However ISMAP was supported since 0.6B, so if you manually enter url using `?url=...`, you can use the earlier version.
 
-## Troubleshooting
+## FAQ
 
 ### I can't get it to run
 
-This program does not have a GUI and is run from the command line. You may need to enable executable bit on Unix systems, for example:
+This program does not have a GUI and is run from the command line. After downloading, you may need to enable executable bit on Unix systems, for example:
 
-```bash
+```shell
 $ cd ~/Downloads
 $ chmod +x wrp-amd64-macos
-$ ./wrp-amd64-macos -t png
+$ ./wrp-amd64-macos
 ```
 
+### Pages are chopped off
+
+Click `st` to re-capture screenshot. You may want to increase the page delay using `-s` flag.
+
+### Websites are blocking headless browsers
+
+This is a well known issue. WRP has some provisions to work around it, but it's a cat and mouse game. By default WRP tries to obtain some current valid User Agent
+from https://github.com/jnrbsn/user-agents rather than using the internal "HeadlessChrome". You can override this to your own, for example:
+
+```shell
+$ wrp -ua="Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/119.0.0.0 Safari/537.36"
+```
+
+### Why is WRP called "proxy" when it's not
+
+WRP originally started as true http proxy. However this stopped working because the whole internet is now encrypted thanks to [Let's Encrypt](https://en.wikipedia.org/wiki/Let%27s_Encrypt). Legacy browsers do not support modern SSL/TLS certs as well as [HTTP CONNECT](https://en.wikipedia.org/wiki/HTTP_tunnel#HTTP_CONNECT_method) so this mode had to be disabled.
+
+Some efforts (ssl strip) are under way but it's very [difficult](https://en.wikipedia.org/wiki/HTTP_tunnel#HTTP_CONNECT_method) to do it correctly and the priority is rather low.
+
+### Why isn't there a Docker image for armv6
+
+Because https://hub.docker.com/r/chromedp/headless-shell/ doesn't have one. WRP uses that image. If you have a fork that builds for armv6 let me know.
+
+### WTF is GIP image format
+
+It's just GIF but optimized. Avoids dithering, uses fast color palette and parallel encoding. https://github.com/tenox7/gip
+
 ## History
 
 * Version 1.0 (2014) started as a *cgi-bin* script, adaptation of `webkit2png.py` and `pcidade.py`, [blog post](https://virtuallyfun.com/2014/03/03/surfing-modern-web-with-ancient-browsers/).
 * Version 2.0 became a stand alone http-proxy server, supporting both Linux and MacOS, [another post](https://virtuallyfun.com/wordpress/2014/03/11/web-rendering-proxy-update//).
-* In 2016 thanks to EFF/Certbot the whole internet migrated to HTTPS/SSL/TLS and WRP largely stopped working. Python code became unmaintainable and there was no easy way to make it work on Windows, even under WSL.
+* In 2016 thanks to [Let's Encrypt](https://en.wikipedia.org/wiki/Let%27s_Encrypt) the whole internet migrated to HTTPS/SSL/TLS and WRP largely stopped working. Python code became unmaintainable and there was no easy way to make it work on Windows, even under WSL.
 * Version 3.0 (2019) has been rewritten in [Go](https://golang.org/) using [Chromedp](https://github.com/chromedp) as browser-in-browser instead of http-proxy. The initial version was [less than 100 lines of code](https://gist.github.com/tenox7/b0f03c039b0a8b67f6c1bf47e2dd0df0).
-* Version 4.0 has been completely refactored to use mouse clicks via imagemap instead parsing a href nodes. 
-* Version 4.1 added sending keystrokes in to input boxes. You can now login to Gmail. Also now runs as a Docker container and on Cloud Run/Azure Containers. 
+* Version 4.0 has been completely refactored to use mouse clicks via imagemap instead parsing a href nodes.
+* Version 4.1 added sending keystrokes in to input boxes. You can now login to Gmail. Also now runs as a Docker container and on Cloud Run/Azure Containers.
 * Version 4.5 introduces rendering whole pages in to a single tall image with client scrolling.
+* Version 4.6 adds blazing fast gif encoding by [Hill Ma](https://github.com/mahiuchun).
+* Version 4.6.3 adds arm64 / aarch64 Docker container support - you can run it on Raspberry PI!
+* Version 4.7 add simple html aka reader aka text mode.
+* Version 4.8 add image support to simple html mode.
+* Version 4.9 adds support for ultra fast, parallel encoded gif image (GIP)
 
 ## Credits
 
@@ -126,10 +209,20 @@ $ ./wrp-amd64-macos -t png
 * Uses [go-quantize](https://github.com/ericpauley/go-quantize), thanks to [ericpauley](https://github.com/ericpauley) for developing the missing go quantizer
 * Thanks to Jason Stevens of [Fun With Virtualization](https://virtuallyfun.com/) for graciously hosting my rumblings
 * Thanks to [claunia](https://github.com/claunia/) for help with the Python/Webkit version in the past
+* Thanks to [Hill Ma](https://github.com/mahiuchun) for ultra fast gif encoding algorithm
 * Historical Python/Webkit versions and prior art can be seen in [wrp-old](https://github.com/tenox7/wrp-old) repo
 
+## Related
+
+You may also be interested in:
+
+* [VncFox](https://github.com/tenox7/vncfox)
+* [Browservice](https://github.com/ttalvitie/browservice)
+* [Browsh](https://github.com/browsh-org/browsh)
+
 ## Legal Stuff
 
-License: Apache 2.0  
-Copyright (c) 2013-2018 Antoni Sawicki  
-Copyright (c) 2019-2020 Google LLC
+```text
+License: Apache 2.0
+Copyright (c) 2013-2025 Antoni Sawicki
+```

go.mod

@@ -1,11 +1,34 @@
 module github.com/tenox7/wrp
 
-go 1.16
+go 1.24
+
+toolchain go1.24.0
 
 require (
+	github.com/JohannesKaufmann/html-to-markdown v1.6.0
 	github.com/MaxHalford/halfgone v0.0.0-20171017091812-482157b86ccb
-	github.com/chromedp/cdproto v0.0.0-20221029224954-108014bf7279
-	github.com/chromedp/chromedp v0.8.6
+	github.com/breml/rootcerts v0.3.1
+	github.com/chromedp/cdproto v0.0.0-20250803210736-d308e07a266d
+	github.com/chromedp/chromedp v0.14.1
 	github.com/ericpauley/go-quantize v0.0.0-20200331213906-ae555eb2afa4
-	golang.org/x/sys v0.1.0 // indirect
+	github.com/lithammer/shortuuid/v4 v4.2.0
+	github.com/nfnt/resize v0.0.0-20180221191011-83c6a9932646
+	github.com/soniakeys/quant v1.0.0
+	github.com/tenox7/gip v1.0.1
+	github.com/yuin/goldmark v1.7.13
+	golang.org/x/image v0.30.0
+)
+
+require (
+	github.com/PuerkitoBio/goquery v1.10.3 // indirect
+	github.com/andybalholm/cascadia v1.3.3 // indirect
+	github.com/chromedp/sysutil v1.1.0 // indirect
+	github.com/go-json-experiment/json v0.0.0-20250813024750-ebf49471dced // indirect
+	github.com/gobwas/httphead v0.1.0 // indirect
+	github.com/gobwas/pool v0.2.1 // indirect
+	github.com/gobwas/ws v1.4.0 // indirect
+	github.com/google/uuid v1.6.0 // indirect
+	golang.org/x/net v0.43.0 // indirect
+	golang.org/x/sys v0.35.0 // indirect
+	gopkg.in/yaml.v2 v2.4.0 // indirect
 )

go.sum

@@ -1,29 +1,156 @@
+github.com/JohannesKaufmann/html-to-markdown v1.6.0 h1:04VXMiE50YYfCfLboJCLcgqF5x+rHJnb1ssNmqpLH/k=
+github.com/JohannesKaufmann/html-to-markdown v1.6.0/go.mod h1:NUI78lGg/a7vpEJTz/0uOcYMaibytE4BUOQS8k78yPQ=
 github.com/MaxHalford/halfgone v0.0.0-20171017091812-482157b86ccb h1:YQ+d0g0P0F/06oDoeEgDHeZCIrnKgLxXcqYOpe8sTuU=
 github.com/MaxHalford/halfgone v0.0.0-20171017091812-482157b86ccb/go.mod h1:J86XzS1wgzJPjpQmpriJ+SetP17JSQUd9l+HWQK86jA=
-github.com/chromedp/cdproto v0.0.0-20220924210414-0e3390be1777/go.mod h1:5Y4sD/eXpwrChIuxhSr/G20n9CdbCmoerOHnuAf0Zr0=
-github.com/chromedp/cdproto v0.0.0-20221029224954-108014bf7279 h1:7+D/pA8BoNzTpcM0Yw8issS95U/ipn0im5vzhfPzDZc=
-github.com/chromedp/cdproto v0.0.0-20221029224954-108014bf7279/go.mod h1:GKljq0VrfU4D5yc+2qA6OVr8pmO/MBbPEWqWQ/oqGEs=
-github.com/chromedp/chromedp v0.8.6 h1:KobeeqR2dpfKSG1prS3Y6+FbffMmGC6xmAobRXA9QEQ=
-github.com/chromedp/chromedp v0.8.6/go.mod h1:nBYHoD6YSNzrr82cIeuOzhw1Jo/s2o0QQ+ifTeoCZ+c=
-github.com/chromedp/sysutil v1.0.0 h1:+ZxhTpfpZlmchB58ih/LBHX52ky7w2VhQVKQMucy3Ic=
-github.com/chromedp/sysutil v1.0.0/go.mod h1:kgWmDdq8fTzXYcKIBqIYvRRTnYb9aNS9moAV0xufSww=
+github.com/PuerkitoBio/goquery v1.9.2/go.mod h1:GHPCaP0ODyyxqcNoFGYlAprUFH81NuRPd0GX3Zu2Mvk=
+github.com/PuerkitoBio/goquery v1.10.3 h1:pFYcNSqHxBD06Fpj/KsbStFRsgRATgnf3LeXiUkhzPo=
+github.com/PuerkitoBio/goquery v1.10.3/go.mod h1:tMUX0zDMHXYlAQk6p35XxQMqMweEKB7iK7iLNd4RH4Y=
+github.com/andybalholm/cascadia v1.3.2/go.mod h1:7gtRlve5FxPPgIgX36uWBX58OdBsSS6lUvCFb+h7KvU=
+github.com/andybalholm/cascadia v1.3.3 h1:AG2YHrzJIm4BZ19iwJ/DAua6Btl3IwJX+VI4kktS1LM=
+github.com/andybalholm/cascadia v1.3.3/go.mod h1:xNd9bqTn98Ln4DwST8/nG+H0yuB8Hmgu1YHNnWw0GeA=
+github.com/breml/rootcerts v0.3.1 h1:PTO35OcW58K2ZYtdBykCsZh9k/eRd57bY65EHrKK/xA=
+github.com/breml/rootcerts v0.3.1/go.mod h1:S/PKh+4d1HUn4HQovEB8hPJZO6pUZYrIhmXBhsegfXw=
+github.com/chromedp/cdproto v0.0.0-20250803210736-d308e07a266d h1:ZtA1sedVbEW7EW80Iz2GR3Ye6PwbJAJXjv7D74xG6HU=
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+golang.org/x/text v0.14.0/go.mod h1:18ZOQIKpY8NJVqYksKHtTdi31H5itFRjB5/qKTNYzSU=
+golang.org/x/text v0.15.0/go.mod h1:18ZOQIKpY8NJVqYksKHtTdi31H5itFRjB5/qKTNYzSU=
+golang.org/x/text v0.21.0/go.mod h1:4IBbMaMmOPCJ8SecivzSH54+73PCFmPWxNTLm+vZkEQ=
+golang.org/x/tools v0.0.0-20180917221912-90fa682c2a6e/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
+golang.org/x/tools v0.0.0-20191119224855-298f0cb1881e/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
+golang.org/x/tools v0.1.12/go.mod h1:hNGJHUnrk76NpqgfD5Aqm5Crs+Hm0VOH/i9J2+nxYbc=
+golang.org/x/tools v0.6.0/go.mod h1:Xwgl3UAJ/d3gWutnCtw505GrjyAbvKui8lOU390QaIU=
+golang.org/x/tools v0.13.0/go.mod h1:HvlwmtVNQAhOuCjW7xxvovg8wbNq7LwfXh/k7wXUl58=
+golang.org/x/tools v0.21.1-0.20240508182429-e35e4ccd0d2d/go.mod h1:aiJjzUbINMkxbQROHiO6hDPo2LHcIPhhQsa9DLh0yGk=
+golang.org/x/xerrors v0.0.0-20190717185122-a985d3407aa7/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
+gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
+gopkg.in/check.v1 v1.0.0-20190902080502-41f04d3bba15 h1:YR8cESwS4TdDjEe65xsg0ogRM/Nc3DYOhEAlW+xobZo=
+gopkg.in/check.v1 v1.0.0-20190902080502-41f04d3bba15/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
+gopkg.in/yaml.v2 v2.2.2/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
+gopkg.in/yaml.v2 v2.4.0 h1:D8xgwECY7CYvx+Y2n4sBz93Jn9JRvxdiyyo8CTfuKaY=
+gopkg.in/yaml.v2 v2.4.0/go.mod h1:RDklbk79AGWmwhnvt/jBztapEOGDOx6ZbXqjP6csGnQ=

ismap.go

@@ -0,0 +1,309 @@
+// WRP ISMAP / ChromeDP routines
+package main
+
+import (
+	"bytes"
+	"context"
+	"fmt"
+	"image"
+	"image/gif"
+	"image/jpeg"
+	"image/png"
+	"io"
+	"log"
+	"math"
+	"net/http"
+	"strconv"
+	"strings"
+	"time"
+
+	"github.com/chromedp/cdproto/emulation"
+	"github.com/chromedp/cdproto/input"
+	"github.com/chromedp/cdproto/page"
+	"github.com/chromedp/chromedp"
+	"github.com/lithammer/shortuuid/v4"
+	"github.com/tenox7/gip"
+)
+
+func chromedpStart() (context.CancelFunc, context.CancelFunc) {
+	opts := append(chromedp.DefaultExecAllocatorOptions[:],
+		chromedp.Flag("headless", *headless),
+		chromedp.Flag("hide-scrollbars", false),
+		chromedp.Flag("enable-automation", false),
+		chromedp.Flag("disable-blink-features", "AutomationControlled"),
+	)
+	if *userAgent == "jnrbsn" {
+		if ua := fetchJnrbsnUserAgent(); ua != "" {
+			opts = append(opts, chromedp.UserAgent(ua))
+		}
+	} else if *userAgent != "" {
+		opts = append(opts, chromedp.UserAgent(*userAgent))
+	}
+	if *browserPath != "" {
+		opts = append(opts, chromedp.ExecPath(*browserPath))
+	}
+	actx, acncl = chromedp.NewExecAllocator(context.Background(), opts...)
+	ctx, cncl = chromedp.NewContext(actx)
+	return cncl, acncl
+}
+
+// Determine what action to take
+func (rq *wrpReq) action() chromedp.Action {
+	// Mouse Click
+	if rq.mouseX > 0 && rq.mouseY > 0 {
+		log.Printf("%s Mouse Click %d,%d\n", rq.r.RemoteAddr, rq.mouseX, rq.mouseY)
+		return chromedp.MouseClickXY(float64(rq.mouseX)/float64(rq.zoom), float64(rq.mouseY)/float64(rq.zoom))
+	}
+	// Buttons
+	if len(rq.buttons) > 0 {
+		log.Printf("%s Button %v\n", rq.r.RemoteAddr, rq.buttons)
+		switch rq.buttons {
+		case "Bk":
+			return chromedp.NavigateBack()
+		case "St":
+			return chromedp.Stop()
+		case "Re":
+			return chromedp.Reload()
+		case "Bs":
+			return chromedp.KeyEvent("\b")
+		case "Rt":
+			return chromedp.KeyEvent("\r")
+		case "<":
+			return chromedp.KeyEvent("\u0302")
+		case "^":
+			return chromedp.KeyEvent("\u0304")
+		case "v":
+			return chromedp.KeyEvent("\u0301")
+		case ">":
+			return chromedp.KeyEvent("\u0303")
+		case "Up":
+			return chromedp.KeyEvent("\u0308")
+		case "Dn":
+			return chromedp.KeyEvent("\u0307")
+		case "All": // Select all
+			return chromedp.KeyEvent("a", chromedp.KeyModifiers(input.ModifierCtrl))
+		}
+	}
+	// Keys
+	if len(rq.keys) > 0 {
+		log.Printf("%s Sending Keys: %#v\n", rq.r.RemoteAddr, rq.keys)
+		return chromedp.KeyEvent(rq.keys)
+	}
+	// Navigate to URL
+	log.Printf("%s Processing Navigate Request for %s\n", rq.r.RemoteAddr, rq.url)
+	return chromedp.Navigate(rq.url)
+}
+
+// Navigate to the desired URL.
+func (rq *wrpReq) navigate() {
+	ctxErr(chromedp.Run(ctx, rq.action()), rq.w)
+}
+
+// Handle context errors
+func ctxErr(err error, w io.Writer) {
+	// TODO: callers should have retry logic, perhaps create another function
+	// that takes ...chromedp.Action and retries with give up
+	if err == nil {
+		return
+	}
+	log.Printf("Context error: %s", err)
+	fmt.Fprintf(w, "Context error: %s<BR>\n", err)
+	if err.Error() != "context canceled" {
+		return
+	}
+	ctx, cncl = chromedp.NewContext(actx)
+	log.Printf("Created new context, try again")
+	fmt.Fprintln(w, "Created new context, try again")
+}
+
+// https://github.com/chromedp/chromedp/issues/979
+func chromedpCaptureScreenshot(res *[]byte, h int64) chromedp.Action {
+	if res == nil {
+		panic("res cannot be nil") // TODO: do not panic here, return error
+	}
+	if h == 0 {
+		return chromedp.CaptureScreenshot(res)
+	}
+
+	return chromedp.ActionFunc(func(ctx context.Context) error {
+		var err error
+		*res, err = page.CaptureScreenshot().Do(ctx)
+		return err
+	})
+}
+
+// Capture Screenshot using CDP
+func (rq *wrpReq) captureScreenshot() {
+	var h int64
+	var pngCap []byte
+	chromedp.Run(ctx,
+		emulation.SetDeviceMetricsOverride(int64(float64(rq.width)/rq.zoom), 10, rq.zoom, false),
+		chromedp.Location(&rq.url),
+		chromedp.ActionFunc(func(ctx context.Context) error {
+			_, _, _, _, _, s, err := page.GetLayoutMetrics().Do(ctx)
+			if err == nil {
+				h = int64(math.Ceil(s.Height))
+			}
+			return nil
+		}),
+	)
+	log.Printf("%s Landed on: %s, Height: %v\n", rq.r.RemoteAddr, rq.url, h)
+	height := int64(float64(rq.height) / rq.zoom)
+	if rq.height == 0 && h > 0 {
+		height = h + 30
+	}
+	chromedp.Run(
+		ctx, emulation.SetDeviceMetricsOverride(int64(float64(rq.width)/rq.zoom), height, rq.zoom, false),
+		chromedp.Sleep(*delay), // TODO(tenox): find a better way to determine if page is rendered
+	)
+	// Capture screenshot...
+	ctxErr(chromedp.Run(ctx, chromedpCaptureScreenshot(&pngCap, rq.height)), rq.w)
+	seq := shortuuid.New()
+	var imgExt string
+	if rq.imgType == "gip" {
+		imgExt = "gif"
+	} else {
+		imgExt = rq.imgType
+	}
+	imgPath := fmt.Sprintf("/img/%s.%s", seq, imgExt)
+	mapPath := fmt.Sprintf("/map/%s.map", seq)
+	ismap[mapPath] = *rq
+	var sSize string
+	var iW, iH int
+	switch rq.imgType {
+	case "gip":
+		i, err := png.Decode(bytes.NewReader(pngCap))
+		if err != nil {
+			log.Printf("%s Failed to decode PNG screenshot: %s\n", rq.r.RemoteAddr, err)
+			fmt.Fprintf(rq.w, "<BR>Unable to decode page PNG screenshot:<BR>%s<BR>\n", err)
+			return
+		}
+		st := time.Now()
+		var gipBuf bytes.Buffer
+		err = gip.Encode(&gipBuf, i, nil)
+		if err != nil {
+			log.Printf("%s Failed to encode GIP: %s\n", rq.r.RemoteAddr, err)
+			fmt.Fprintf(rq.w, "<BR>Unable to encode GIP:<BR>%s<BR>\n", err)
+			return
+		}
+		img[imgPath] = gipBuf
+		sSize = fmt.Sprintf("%.0f KB", float32(len(gipBuf.Bytes()))/1024.0)
+		iW = i.Bounds().Max.X
+		iH = i.Bounds().Max.Y
+		log.Printf("%s Encoded GIP image: %s, Size: %s, Res: %dx%d, Time: %vms\n", rq.r.RemoteAddr, imgPath, sSize, iW, iH, time.Since(st).Milliseconds())
+	case "png":
+		pngBuf := bytes.NewBuffer(pngCap)
+		img[imgPath] = *pngBuf
+		cfg, _, _ := image.DecodeConfig(pngBuf)
+		sSize = fmt.Sprintf("%.0f KB", float32(len(pngBuf.Bytes()))/1024.0)
+		iW = cfg.Width
+		iH = cfg.Height
+		log.Printf("%s Got PNG image: %s, Size: %s, Res: %dx%d\n", rq.r.RemoteAddr, imgPath, sSize, iW, iH)
+	case "gif":
+		i, err := png.Decode(bytes.NewReader(pngCap))
+		if err != nil {
+			log.Printf("%s Failed to decode PNG screenshot: %s\n", rq.r.RemoteAddr, err)
+			fmt.Fprintf(rq.w, "<BR>Unable to decode page PNG screenshot:<BR>%s<BR>\n", err)
+			return
+		}
+		st := time.Now()
+		var gifBuf bytes.Buffer
+		err = gif.Encode(&gifBuf, gifPalette(i, rq.nColors), &gif.Options{})
+		if err != nil {
+			log.Printf("%s Failed to encode GIF: %s\n", rq.r.RemoteAddr, err)
+			fmt.Fprintf(rq.w, "<BR>Unable to encode GIF:<BR>%s<BR>\n", err)
+			return
+		}
+		img[imgPath] = gifBuf
+		sSize = fmt.Sprintf("%.0f KB", float32(len(gifBuf.Bytes()))/1024.0)
+		iW = i.Bounds().Max.X
+		iH = i.Bounds().Max.Y
+		log.Printf("%s Encoded GIF image: %s, Size: %s, Colors: %d, Res: %dx%d, Time: %vms\n", rq.r.RemoteAddr, imgPath, sSize, rq.nColors, iW, iH, time.Since(st).Milliseconds())
+	case "jpg":
+		i, err := png.Decode(bytes.NewReader(pngCap))
+		if err != nil {
+			log.Printf("%s Failed to decode PNG screenshot: %s\n", rq.r.RemoteAddr, err)
+			fmt.Fprintf(rq.w, "<BR>Unable to decode page PNG screenshot:<BR>%s<BR>\n", err)
+			return
+		}
+		st := time.Now()
+		var jpgBuf bytes.Buffer
+		err = jpeg.Encode(&jpgBuf, i, &jpeg.Options{Quality: int(rq.jQual)})
+		if err != nil {
+			log.Printf("%s Failed to encode JPG: %s\n", rq.r.RemoteAddr, err)
+			fmt.Fprintf(rq.w, "<BR>Unable to encode JPG:<BR>%s<BR>\n", err)
+			return
+		}
+		img[imgPath] = jpgBuf
+		sSize = fmt.Sprintf("%.0f KB", float32(len(jpgBuf.Bytes()))/1024.0)
+		iW = i.Bounds().Max.X
+		iH = i.Bounds().Max.Y
+		log.Printf("%s Encoded JPG image: %s, Size: %s, Quality: %d, Res: %dx%d, Time: %vms\n", rq.r.RemoteAddr, imgPath, sSize, *defJpgQual, iW, iH, time.Since(st).Milliseconds())
+	}
+	rq.printUI(uiParams{
+		bgColor:    "#FFFFFF",
+		pageHeight: fmt.Sprintf("%d PX", h),
+		imgSize:    sSize,
+		imgURL:     imgPath,
+		mapURL:     mapPath,
+		imgWidth:   iW,
+		imgHeight:  iH,
+	})
+	log.Printf("%s Done with capture for %s\n", rq.r.RemoteAddr, rq.url)
+}
+
+func mapServer(w http.ResponseWriter, r *http.Request) {
+	log.Printf("%s ISMAP Request for %s [%+v]\n", r.RemoteAddr, r.URL.Path, r.URL.RawQuery)
+	rq, ok := ismap[r.URL.Path]
+	rq.r = r
+	rq.w = w
+	if !ok {
+		fmt.Fprintf(w, "Unable to find map %s\n", r.URL.Path)
+		log.Printf("Unable to find map %s\n", r.URL.Path)
+		return
+	}
+	if !*noDel {
+		defer delete(ismap, r.URL.Path)
+	}
+	n, err := fmt.Sscanf(r.URL.RawQuery, "%d,%d", &rq.mouseX, &rq.mouseY)
+	if err != nil || n != 2 {
+		fmt.Fprintf(w, "n=%d, err=%s\n", n, err)
+		log.Printf("%s ISMAP n=%d, err=%s\n", r.RemoteAddr, n, err)
+		return
+	}
+	log.Printf("%s WrpReq from ISMAP: %+v\n", r.RemoteAddr, rq)
+	if len(rq.url) < 4 {
+		rq.printUI(uiParams{bgColor: "#FFFFFF"})
+		return
+	}
+	rq.navigate() // TODO: if error from navigate do not capture
+	rq.captureScreenshot()
+}
+
+// TODO: merge this with html mode IMGZ
+func imgServerMap(w http.ResponseWriter, r *http.Request) {
+	log.Printf("%s IMG Request for %s\n", r.RemoteAddr, r.URL.Path)
+	imgBuf, ok := img[r.URL.Path]
+	if !ok || imgBuf.Bytes() == nil {
+		fmt.Fprintf(w, "Unable to find image %s\n", r.URL.Path)
+		log.Printf("%s Unable to find image %s\n", r.RemoteAddr, r.URL.Path)
+		return
+	}
+	if !*noDel {
+		defer delete(img, r.URL.Path)
+	}
+	switch {
+	case strings.HasSuffix(r.URL.Path, ".gif"):
+		w.Header().Set("Content-Type", "image/gif")
+	case strings.HasSuffix(r.URL.Path, ".png"):
+		w.Header().Set("Content-Type", "image/png")
+	case strings.HasSuffix(r.URL.Path, ".jpg"):
+		w.Header().Set("Content-Type", "image/jpeg")
+	}
+	w.Header().Set("Content-Length", strconv.Itoa(len(imgBuf.Bytes())))
+	w.Header().Set("Cache-Control", "max-age=0")
+	w.Header().Set("Expires", "-1")
+	w.Header().Set("Pragma", "no-cache")
+	w.Write(imgBuf.Bytes())
+	w.(http.Flusher).Flush()
+}

shtml.go

@@ -0,0 +1,253 @@
+// WRP TXT / Simple HTML Mode Routines
+package main
+
+// TODO:
+// - add image processing times counter to the footer
+// - img cache w/garbage collector / test back/button behavior in old browsers
+// - add referer header
+// - svg support
+// - incorrect cert support in both markdown and image download
+// - unify cdp and txt image handlers
+// - use goroutiness to process images
+// - get inner html from chromedp instead of html2markdown
+//
+// - BUG: DomainFromURL always prefixes with http instead of https
+//   reproduces on vsi vms docs
+// - BUG: markdown table errors
+//   reproduces on hacker news
+// - BUG: captcha errors using html to markdown, perhaps use cdp inner html + downloaded images
+//   reproduces on https://www.cnn.com/cnn-underscored/electronics
+
+import (
+	"bytes"
+	"encoding/base64"
+	"errors"
+	"fmt"
+	"image"
+	"image/gif"
+	"image/jpeg"
+	"image/png"
+	"io"
+	"log"
+	"net/http"
+	"strconv"
+	"strings"
+	"sync"
+	"time"
+
+	h2m "github.com/JohannesKaufmann/html-to-markdown"
+	"github.com/JohannesKaufmann/html-to-markdown/plugin"
+	"github.com/lithammer/shortuuid/v4"
+	"github.com/nfnt/resize"
+	"github.com/tenox7/gip"
+	"github.com/yuin/goldmark"
+	"github.com/yuin/goldmark/ast"
+	"github.com/yuin/goldmark/extension"
+	"github.com/yuin/goldmark/parser"
+	"github.com/yuin/goldmark/text"
+	"github.com/yuin/goldmark/util"
+	"golang.org/x/image/webp"
+)
+
+var imgStor imageStore
+
+const imgZpfx = "/imgz/"
+
+func init() {
+	imgStor.img = make(map[string]imageContainer)
+}
+
+type imageContainer struct {
+	data  []byte
+	url   string
+	added time.Time
+}
+
+type imageStore struct {
+	img map[string]imageContainer
+	sync.Mutex
+}
+
+func (i *imageStore) add(id, url string, img []byte) {
+	i.Lock()
+	defer i.Unlock()
+	i.img[id] = imageContainer{data: img, url: url, added: time.Now()}
+}
+
+func (i *imageStore) get(id string) ([]byte, error) {
+	i.Lock()
+	defer i.Unlock()
+	img, ok := i.img[id]
+	if !ok {
+		return nil, errors.New("not found")
+	}
+	return img.data, nil
+}
+
+func (i *imageStore) del(id string) {
+	i.Lock()
+	defer i.Unlock()
+	delete(i.img, id)
+}
+
+func fetchImage(id, url, imgType string, maxSize, imgOpt int) (int, error) {
+	log.Printf("Downloading IMGZ URL=%q for ID=%q", url, id)
+	var in []byte
+	var err error
+	switch url[:4] {
+	case "http":
+		r, err := http.Get(url) // TODO: possibly set a header "referer" here
+		if err != nil {
+			return 0, fmt.Errorf("Error downloading %q: %v", url, err)
+		}
+		if r.StatusCode != http.StatusOK {
+			return 0, fmt.Errorf("Error %q HTTP Status Code: %v", url, r.StatusCode)
+		}
+		defer r.Body.Close()
+		in, err = io.ReadAll(r.Body)
+		if err != nil {
+			return 0, fmt.Errorf("Error reading %q: %v", url, err)
+		}
+	case "data":
+		idx := strings.Index(url, ",")
+		if idx < 1 {
+			return 0, fmt.Errorf("image is embeded but unable to find coma: %q", url)
+		}
+		in, err = base64.StdEncoding.DecodeString(url[idx+1:])
+		if err != nil {
+			return 0, fmt.Errorf("error decoding image from url embed: %q: %v", url, err)
+		}
+	}
+	out, err := smallImg(in, imgType, maxSize, imgOpt)
+	if err != nil {
+		return 0, fmt.Errorf("Error scaling down image: %v", err)
+	}
+	imgStor.add(id, url, out)
+	return len(out), nil
+}
+
+func smallImg(src []byte, imgType string, maxSize, imgOpt int) ([]byte, error) {
+	t := http.DetectContentType(src)
+	var err error
+	var img image.Image
+	switch t {
+	case "image/png":
+		img, err = png.Decode(bytes.NewReader(src))
+	case "image/gif":
+		img, err = gif.Decode(bytes.NewReader(src))
+	case "image/jpeg":
+		img, err = jpeg.Decode(bytes.NewReader(src))
+	case "image/webp":
+		img, err = webp.Decode(bytes.NewReader(src))
+	default: // TODO: also add svg
+		err = errors.New("unknown content type: " + t)
+	}
+	if err != nil {
+		return nil, fmt.Errorf("image decode problem: %v", err)
+	}
+	img = resize.Thumbnail(uint(maxSize), uint(maxSize), img, resize.NearestNeighbor)
+	var outBuf bytes.Buffer
+	switch imgType {
+	case "gip":
+		err = gip.Encode(&outBuf, img, nil)
+	case "png":
+		err = png.Encode(&outBuf, img)
+	case "gif":
+		err = gif.Encode(&outBuf, gifPalette(img, int64(imgOpt)), &gif.Options{})
+	case "jpg":
+		err = jpeg.Encode(&outBuf, img, &jpeg.Options{Quality: imgOpt})
+	}
+	if err != nil {
+		return nil, fmt.Errorf("gif encode problem: %v", err)
+	}
+	return outBuf.Bytes(), nil
+}
+
+type astTransformer struct {
+	imgType string
+	maxSize int
+	imgOpt  int
+	totSize int
+}
+
+func (t *astTransformer) Transform(node *ast.Document, reader text.Reader, pc parser.Context) {
+	ast.Walk(node, func(n ast.Node, entering bool) (ast.WalkStatus, error) {
+		if link, ok := n.(*ast.Link); ok && entering {
+			link.Destination = append([]byte("/?m=html&t="+t.imgType+"&s="+strconv.Itoa(t.maxSize)+"&url="), link.Destination...)
+		}
+		if img, ok := n.(*ast.Image); ok && entering {
+			var imgExt string
+			if t.imgType == "gip" {
+				imgExt = "gif"
+			} else {
+				imgExt = t.imgType
+			}
+			seq := shortuuid.New() + "." + imgExt
+			size, err := fetchImage(seq, string(img.Destination), t.imgType, t.maxSize, t.imgOpt) // TODO: use goroutines with waitgroup
+			if err != nil {
+				log.Print(err)
+				n.Parent().RemoveChildren(n)
+				return ast.WalkContinue, nil
+			}
+			img.Destination = []byte(imgZpfx + seq)
+			t.totSize += size
+		}
+		return ast.WalkContinue, nil
+	})
+}
+
+func (rq *wrpReq) captureMarkdown() {
+	log.Printf("Processing Markdown conversion request for %v", rq.url)
+	// TODO: bug - DomainFromURL always prefixes with http:// instead of https
+	// this causes issues on some websites, fix or write a smarter DomainFromURL
+	c := h2m.NewConverter(h2m.DomainFromURL(rq.url), true, nil)
+	c.Use(plugin.GitHubFlavored())
+	md, err := c.ConvertURL(rq.url) // We could also get inner html from chromedp
+	if err != nil {
+		http.Error(rq.w, err.Error(), http.StatusInternalServerError)
+		return
+	}
+	log.Printf("Got %v bytes md from %v", len(md), rq.url)
+	var imgOpt int
+	switch rq.imgType {
+	case "jpg":
+		imgOpt = int(rq.jQual)
+	case "gif":
+		imgOpt = int(rq.nColors)
+	case "gip":
+		imgOpt = 0
+	}
+	t := &astTransformer{imgType: rq.imgType, maxSize: int(rq.maxSize), imgOpt: imgOpt}
+	gm := goldmark.New(
+		goldmark.WithExtensions(extension.GFM),
+		goldmark.WithParserOptions(parser.WithASTTransformers(util.Prioritized(t, 100))),
+	)
+	var ht bytes.Buffer
+	err = gm.Convert([]byte(md), &ht)
+	if err != nil {
+		http.Error(rq.w, err.Error(), http.StatusInternalServerError)
+		return
+	}
+	log.Printf("Rendered %v bytes html for %v", len(ht.String()), rq.url)
+	rq.printUI(uiParams{
+		text:    string(asciify([]byte(ht.String()))),
+		bgColor: "#FFFFFF",
+		imgSize: fmt.Sprintf("%.0f KB", float32(t.totSize)/1024.0),
+	})
+}
+
+func imgServerTxt(w http.ResponseWriter, r *http.Request) {
+	log.Printf("%s IMGZ Request for %s", r.RemoteAddr, r.URL.Path)
+	id := strings.Replace(r.URL.Path, imgZpfx, "", 1)
+	img, err := imgStor.get(id)
+	if err != nil {
+		http.Error(w, err.Error(), http.StatusInternalServerError)
+		log.Printf("%s IMGZ error for %s: %v", r.RemoteAddr, r.URL.Path, err)
+		return
+	}
+	imgStor.del(id)
+	w.Header().Set("Content-Type", http.DetectContentType(img))
+	w.Header().Set("Content-Length", strconv.Itoa(len(img)))
+	w.Write(img)
+	w.(http.Flusher).Flush()
+}

util.go

@@ -0,0 +1,101 @@
+// wrp utility functions
+package main
+
+import (
+	"encoding/json"
+	"image"
+	"image/color"
+	"log"
+	"net"
+	"net/http"
+	"strings"
+	"time"
+
+	"github.com/MaxHalford/halfgone"
+	"github.com/ericpauley/go-quantize/quantize"
+)
+
+func printMyIPs(b string) {
+	ap := strings.Split(b, ":")
+	if len(ap) < 1 {
+		log.Fatal("Wrong format of ipaddress:port")
+	}
+	log.Printf("Listen address: %v", b)
+	if ap[0] != "" && ap[0] != "0.0.0.0" {
+		return
+	}
+	a, err := net.InterfaceAddrs()
+	if err != nil {
+		log.Print("Unable to get interfaces: ", err)
+		return
+	}
+	var m string
+	for _, i := range a {
+		n, ok := i.(*net.IPNet)
+		if !ok || n.IP.IsLoopback() || strings.Contains(n.IP.String(), ":") {
+			continue
+		}
+		m = m + n.IP.String() + " "
+	}
+	log.Print("My IP addresses: ", m)
+}
+
+func gifPalette(i image.Image, n int64) image.Image {
+	switch n {
+	case 2:
+		i = halfgone.FloydSteinbergDitherer{}.Apply(halfgone.ImageToGray(i))
+	default:
+		q := quantize.MedianCutQuantizer{}
+		p := q.Quantize(make([]color.Color, 0, int(n)), i)
+		bounds := i.Bounds()
+		quantized := image.NewPaletted(bounds, p)
+		for y := bounds.Min.Y; y < bounds.Max.Y; y++ {
+			for x := bounds.Min.X; x < bounds.Max.X; x++ {
+				quantized.Set(x, y, i.At(x, y))
+			}
+		}
+		i = quantized
+	}
+	return i
+}
+
+func asciify(s []byte) []byte {
+	a := make([]byte, len(s))
+	for i := 0; i < len(s); i++ {
+		if s[i] > 127 {
+			a[i] = '.'
+			continue
+		}
+		a[i] = s[i]
+	}
+	return a
+}
+
+func fetchJnrbsnUserAgent() string {
+	client := &http.Client{Timeout: 5 * time.Second}
+	resp, err := client.Get("https://jnrbsn.github.io/user-agents/user-agents.json")
+	if err != nil {
+		log.Printf("Failed to fetch user agents from jnrbsn: %v", err)
+		return ""
+	}
+	defer resp.Body.Close()
+
+	if resp.StatusCode != 200 {
+		log.Printf("jnrbsn API returned status: %d", resp.StatusCode)
+		return ""
+	}
+
+	var userAgents []string
+	if err := json.NewDecoder(resp.Body).Decode(&userAgents); err != nil {
+		log.Printf("Failed to decode jnrbsn user agents JSON: %v", err)
+		return ""
+	}
+
+	if len(userAgents) == 0 {
+		log.Printf("jnrbsn API returned no user agents")
+		return ""
+	}
+
+	log.Printf("Fetched user agent from jnrbsn: %s", userAgents[0])
+	return userAgents[0]
+}

wrp.go

@@ -1,8 +1,7 @@
 //
 // WRP - Web Rendering Proxy
 //
-// Copyright (c) 2013-2018 Antoni Sawicki
-// Copyright (c) 2019-2021 Google LLC
+// Copyright (c) 2013-2025 Antoni Sawicki
 //
 
 package main
@@ -13,45 +12,51 @@ import (
 	"embed"
 	"flag"
 	"fmt"
-	"html/template"
-	"image"
-	"image/gif"
-	"image/png"
-	"io/ioutil"
+	"io"
 	"log"
-	"math"
-	"math/rand"
 	"net/http"
 	"net/url"
 	"os"
 	"os/signal"
+	"runtime"
 	"strconv"
 	"strings"
 	"syscall"
+	"text/template"
 	"time"
 
-	"github.com/MaxHalford/halfgone"
-	"github.com/chromedp/cdproto/css"
-	"github.com/chromedp/cdproto/emulation"
-	"github.com/chromedp/cdproto/page"
-	"github.com/chromedp/chromedp"
-	"github.com/ericpauley/go-quantize/quantize"
+	_ "github.com/breml/rootcerts"
+)
+
+const version = "4.9.3"
+
+var (
+	addr        = flag.String("l", ":8080", "Listen address:port, default :8080")
+	headless    = flag.Bool("h", true, "Headless mode / hide browser window (default true)")
+	noDel       = flag.Bool("n", false, "Do not free maps and images after use")
+	defType     = flag.String("t", "gip", "Image type: gip|png|gif|jpg")
+	wrpMode     = flag.String("m", "ismap", "WRP Mode: ismap|html")
+	defImgSize  = flag.Int64("is", 200, "html mode default image size")
+	defJpgQual  = flag.Int64("q", 75, "Jpeg image quality, default 75%") // TODO: this should be form dropdown when jpeg is selected as image type
+	fgeom       = flag.String("g", "1152x600x216", "Geometry: width x height x colors, height can be 0 for unlimited")
+	htmFnam     = flag.String("ui", "wrp.html", "HTML template file for the UI")
+	delay       = flag.Duration("s", 2*time.Second, "Delay/sleep after page is rendered and before screenshot is taken")
+	userAgent   = flag.String("ua", "jnrbsn", "override chrome user agent (jnrbsn=fetch from API, empty=default)")
+	browserPath = flag.String("b", "", "browser executable path (e.g., /Applications/Brave Browser.app/Contents/MacOS/Brave Browser)")
+	searchEng   = flag.String("se", "https://duckduckgo.com/search?q=", "Search engine string")
 )
 
 var (
-	version  = "4.5.3"
-	srv      http.Server
-	ctx      context.Context
-	cancel   context.CancelFunc
-	img      = make(map[string]bytes.Buffer)
-	ismap    = make(map[string]wrpReq)
-	noDel    bool
-	defType  string
-	defGeom  geom
-	htmlTmpl *template.Template
+	srv         http.Server
+	actx, ctx   context.Context
+	acncl, cncl context.CancelFunc
+	img         = make(map[string]bytes.Buffer)
+	ismap       = make(map[string]wrpReq)
+	defGeom     geom
+	htmlTmpl    *template.Template
 )
 
-// go:embed *.html
+//go:embed *.html
 var fs embed.FS
 
 type geom struct {
@@ -60,12 +65,17 @@ type geom struct {
 	c int64
 }
 
+// TODO: there is a major overlap/duplication/triplication
+// between the 3 data structs, perhps we could reduce to just one?
+
 // Data for html template
 type uiData struct {
 	Version    string
+	WrpMode    string
 	URL        string
 	BgColor    string
 	NColors    int64
+	JQual      int64
 	Width      int64
 	Height     int64
 	Zoom       float64
@@ -74,12 +84,14 @@ type uiData struct {
 	ImgSize    string
 	ImgWidth   int
 	ImgHeight  int
+	MaxSize    int64
 	MapURL     string
 	PageHeight string
+	TeXT       string
 }
 
 // Parameters for HTML print function
-type printParams struct {
+type uiParams struct {
 	bgColor    string
 	pageHeight string
 	imgSize    string
@@ -87,31 +99,39 @@ type printParams struct {
 	mapURL     string
 	imgWidth   int
 	imgHeight  int
+	text       string
 }
 
 // WRP Request
 type wrpReq struct {
-	url     string  // url
-	width   int64   // width
-	height  int64   // height
-	zoom    float64 // zoom/scale
-	colors  int64   // #colors
-	mouseX  int64   // mouseX
-	mouseY  int64   // mouseY
-	keys    string  // keys to send
-	buttons string  // Fn buttons
-	imgType string  // imgtype
+	url     string
+	width   int64
+	height  int64
+	zoom    float64
+	nColors int64
+	jQual   int64
+	mouseX  int64
+	mouseY  int64
+	keys    string
+	buttons string
+	imgType string
+	wrpMode string
+	maxSize int64
 	w       http.ResponseWriter
 	r       *http.Request
 }
 
-// Parse HTML Form, Process Input Boxes, Etc.
 func (rq *wrpReq) parseForm() {
 	rq.r.ParseForm()
+	rq.wrpMode = rq.r.FormValue("m")
+	if rq.wrpMode == "" {
+		rq.wrpMode = *wrpMode
+	}
 	rq.url = rq.r.FormValue("url")
 	if len(rq.url) > 1 && !strings.HasPrefix(rq.url, "http") {
-		rq.url = fmt.Sprintf("http://www.google.com/search?q=%s", url.QueryEscape(rq.url))
+		rq.url = *searchEng + url.QueryEscape(rq.url)
 	}
+	// TODO: implement atoiOrZero
 	rq.width, _ = strconv.ParseInt(rq.r.FormValue("w"), 10, 64)
 	rq.height, _ = strconv.ParseInt(rq.r.FormValue("h"), 10, 64)
 	if rq.width < 10 && rq.height < 10 {
@@ -122,33 +142,48 @@ func (rq *wrpReq) parseForm() {
 	if rq.zoom < 0.1 {
 		rq.zoom = 1.0
 	}
-	rq.colors, _ = strconv.ParseInt(rq.r.FormValue("c"), 10, 64)
-	if rq.colors < 2 || rq.colors > 256 {
-		rq.colors = defGeom.c
+	rq.imgType = rq.r.FormValue("t")
+	switch rq.imgType {
+	case "gip", "png", "gif", "jpg":
+	default:
+		rq.imgType = *defType
+	}
+	rq.nColors, _ = strconv.ParseInt(rq.r.FormValue("c"), 10, 64)
+	if rq.nColors < 2 || rq.nColors > 256 {
+		rq.nColors = defGeom.c
+	}
+	rq.jQual, _ = strconv.ParseInt(rq.r.FormValue("q"), 10, 64)
+	if rq.jQual < 1 || rq.jQual > 100 {
+		rq.jQual = *defJpgQual
 	}
 	rq.keys = rq.r.FormValue("k")
 	rq.buttons = rq.r.FormValue("Fn")
-	rq.imgType = rq.r.FormValue("t")
-	if rq.imgType != "gif" && rq.imgType != "png" {
-		rq.imgType = defType
+	rq.maxSize, _ = strconv.ParseInt(rq.r.FormValue("s"), 10, 64)
+	if rq.maxSize == 0 {
+		rq.maxSize = *defImgSize
 	}
 	log.Printf("%s WrpReq from UI Form: %+v\n", rq.r.RemoteAddr, rq)
 }
 
-// Display WP UI
-func (rq *wrpReq) printHTML(p printParams) {
+func (rq *wrpReq) printUI(p uiParams) {
 	rq.w.Header().Set("Cache-Control", "max-age=0")
 	rq.w.Header().Set("Expires", "-1")
 	rq.w.Header().Set("Pragma", "no-cache")
 	rq.w.Header().Set("Content-Type", "text/html")
+	if p.bgColor == "" {
+		p.bgColor = "#FFFFFF"
+	}
 	data := uiData{
 		Version:    version,
+		WrpMode:    rq.wrpMode,
 		URL:        rq.url,
 		BgColor:    p.bgColor,
 		Width:      rq.width,
 		Height:     rq.height,
-		NColors:    rq.colors,
+		NColors:    rq.nColors,
+		JQual:      rq.jQual,
 		Zoom:       rq.zoom,
+		MaxSize:    rq.maxSize,
 		ImgType:    rq.imgType,
 		ImgSize:    p.imgSize,
 		ImgWidth:   p.imgWidth,
@@ -156,184 +191,14 @@ func (rq *wrpReq) printHTML(p printParams) {
 		ImgURL:     p.imgURL,
 		MapURL:     p.mapURL,
 		PageHeight: p.pageHeight,
+		TeXT:       p.text,
 	}
 	err := htmlTmpl.Execute(rq.w, data)
 	if err != nil {
-		log.Fatal(err)
+		fmt.Fprintf(rq.w, "Error: %v", err)
 	}
 }
 
-// Determine what action to take
-func (rq *wrpReq) action() chromedp.Action {
-	// Mouse Click
-	if rq.mouseX > 0 && rq.mouseY > 0 {
-		log.Printf("%s Mouse Click %d,%d\n", rq.r.RemoteAddr, rq.mouseX, rq.mouseY)
-		return chromedp.MouseClickXY(float64(rq.mouseX)/float64(rq.zoom), float64(rq.mouseY)/float64(rq.zoom))
-	}
-	// Buttons
-	if len(rq.buttons) > 0 {
-		log.Printf("%s Button %v\n", rq.r.RemoteAddr, rq.buttons)
-		switch rq.buttons {
-		case "Bk":
-			return chromedp.NavigateBack()
-		case "St":
-			return chromedp.Stop()
-		case "Re":
-			return chromedp.Reload()
-		case "Bs":
-			return chromedp.KeyEvent("\b")
-		case "Rt":
-			return chromedp.KeyEvent("\r")
-		case "<":
-			return chromedp.KeyEvent("\u0302")
-		case "^":
-			return chromedp.KeyEvent("\u0304")
-		case "v":
-			return chromedp.KeyEvent("\u0301")
-		case ">":
-			return chromedp.KeyEvent("\u0303")
-		}
-	}
-	// Keys
-	if len(rq.keys) > 0 {
-		log.Printf("%s Sending Keys: %#v\n", rq.r.RemoteAddr, rq.keys)
-		return chromedp.KeyEvent(rq.keys)
-	}
-	// Navigate to URL
-	log.Printf("%s Processing Capture Request for %s\n", rq.r.RemoteAddr, rq.url)
-	return chromedp.Navigate(rq.url)
-}
-
-// Process Keyboard and Mouse events or Navigate to the desired URL.
-func (rq *wrpReq) navigate() {
-	err := chromedp.Run(ctx, rq.action())
-	if err != nil {
-		if err.Error() == "context canceled" {
-			log.Printf("%s Contex cancelled, try again", rq.r.RemoteAddr)
-			fmt.Fprintf(rq.w, "<BR>%s<BR> -- restarting, try again", err)
-			ctx, cancel = chromedp.NewContext(context.Background())
-			return
-		}
-		log.Printf("%s %s", rq.r.RemoteAddr, err)
-		fmt.Fprintf(rq.w, "<BR>%s<BR>", err)
-	}
-}
-
-// https://github.com/chromedp/chromedp/issues/979
-func chromedpCaptureScreenshot(res *[]byte, h int64) chromedp.Action {
-	if res == nil {
-		panic("res cannot be nil")
-	}
-	if h == 0 {
-		return chromedp.CaptureScreenshot(res)
-	}
-
-	return chromedp.ActionFunc(func(ctx context.Context) error {
-		var err error
-		*res, err = page.CaptureScreenshot().Do(ctx)
-		return err
-	})
-}
-
-// Capture currently rendered web page to an image and fake ISMAP
-func (rq *wrpReq) capture() {
-	var err error
-	var styles []*css.ComputedStyleProperty
-	var r, g, b int
-	var h int64
-	var pngcap []byte
-	chromedp.Run(ctx,
-		emulation.SetDeviceMetricsOverride(int64(float64(rq.width)/rq.zoom), 10, rq.zoom, false),
-		chromedp.Location(&rq.url),
-		chromedp.ComputedStyle("body", &styles, chromedp.ByQuery),
-		chromedp.ActionFunc(func(ctx context.Context) error {
-			_, _, _, _, _, s, err := page.GetLayoutMetrics().Do(ctx)
-			if err == nil {
-				h = int64(math.Ceil(s.Height))
-			}
-			return nil
-		}),
-	)
-	for _, style := range styles {
-		if style.Name == "background-color" {
-			fmt.Sscanf(style.Value, "rgb(%d,%d,%d)", &r, &g, &b)
-		}
-	}
-	log.Printf("%s Landed on: %s, Height: %v\n", rq.r.RemoteAddr, rq.url, h)
-	height := int64(float64(rq.height) / rq.zoom)
-	if rq.height == 0 && h > 0 {
-		height = h + 30
-	}
-	chromedp.Run(
-		ctx, emulation.SetDeviceMetricsOverride(int64(float64(rq.width)/rq.zoom), height, rq.zoom, false),
-		chromedp.Sleep(time.Second*2), // TODO(tenox): totally lame, find a better way to determine if page is rendered
-	)
-	// Capture screenshot...
-	err = chromedp.Run(ctx, chromedpCaptureScreenshot(&pngcap, rq.height))
-	if err != nil {
-		if err.Error() == "context canceled" {
-			log.Printf("%s Contex cancelled, try again", rq.r.RemoteAddr)
-			fmt.Fprintf(rq.w, "<BR>%s<BR> -- restarting, try again", err)
-			ctx, cancel = chromedp.NewContext(context.Background())
-			return
-		}
-		log.Printf("%s Failed to capture screenshot: %s\n", rq.r.RemoteAddr, err)
-		fmt.Fprintf(rq.w, "<BR>Unable to capture screenshot:<BR>%s<BR>\n", err)
-		return
-	}
-	seq := rand.Intn(9999)
-	imgpath := fmt.Sprintf("/img/%04d.%s", seq, rq.imgType)
-	mappath := fmt.Sprintf("/map/%04d.map", seq)
-	ismap[mappath] = *rq
-	var ssize string
-	var iw, ih int
-	switch rq.imgType {
-	case "gif":
-		i, err := png.Decode(bytes.NewReader(pngcap))
-		if err != nil {
-			log.Printf("%s Failed to decode screenshot: %s\n", rq.r.RemoteAddr, err)
-			fmt.Fprintf(rq.w, "<BR>Unable to decode page screenshot:<BR>%s<BR>\n", err)
-			return
-		}
-		if rq.colors == 2 {
-			gray := halfgone.ImageToGray(i)
-			i = halfgone.FloydSteinbergDitherer{}.Apply(gray)
-		}
-		var gifbuf bytes.Buffer
-		st := time.Now()
-		err = gif.Encode(&gifbuf, i, &gif.Options{NumColors: int(rq.colors), Quantizer: quantize.MedianCutQuantizer{}})
-		if err != nil {
-			log.Printf("%s Failed to encode GIF: %s\n", rq.r.RemoteAddr, err)
-			fmt.Fprintf(rq.w, "<BR>Unable to encode GIF:<BR>%s<BR>\n", err)
-			return
-		}
-		img[imgpath] = gifbuf
-		ssize = fmt.Sprintf("%.0f KB", float32(len(gifbuf.Bytes()))/1024.0)
-		iw = i.Bounds().Max.X
-		ih = i.Bounds().Max.Y
-		log.Printf("%s Encoded GIF image: %s, Size: %s, Colors: %d, %dx%d, Time: %vms\n", rq.r.RemoteAddr, imgpath, ssize, rq.colors, iw, ih, time.Since(st).Milliseconds())
-	case "png":
-		pngbuf := bytes.NewBuffer(pngcap)
-		img[imgpath] = *pngbuf
-		cfg, _, _ := image.DecodeConfig(pngbuf)
-		ssize = fmt.Sprintf("%.0f KB", float32(len(pngbuf.Bytes()))/1024.0)
-		iw = cfg.Width
-		ih = cfg.Height
-		log.Printf("%s Got PNG image: %s, Size: %s, %dx%d\n", rq.r.RemoteAddr, imgpath, ssize, iw, ih)
-	}
-	rq.printHTML(printParams{
-		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,
-	})
-	log.Printf("%s Done with capture for %s\n", rq.r.RemoteAddr, rq.url)
-}
-
-// Process HTTP requests to WRP '/' url
 func pageServer(w http.ResponseWriter, r *http.Request) {
 	log.Printf("%s Page Request for %s [%+v]\n", r.RemoteAddr, r.URL.Path, r.URL.RawQuery)
 	rq := wrpReq{
@@ -342,176 +207,106 @@ func pageServer(w http.ResponseWriter, r *http.Request) {
 	}
 	rq.parseForm()
 	if len(rq.url) < 4 {
-		rq.printHTML(printParams{bgColor: "#FFFFFF"})
+		rq.printUI(uiParams{bgColor: "#FFFFFF"})
 		return
 	}
-	rq.navigate()
-	rq.capture()
+	rq.navigate() // TODO: if error from navigate do not capture
+	if rq.wrpMode == "html" {
+		rq.captureMarkdown()
+		return
+	}
+	rq.captureScreenshot()
 }
 
-// Process HTTP requests to ISMAP '/map/' url
-func mapServer(w http.ResponseWriter, r *http.Request) {
-	log.Printf("%s ISMAP Request for %s [%+v]\n", r.RemoteAddr, r.URL.Path, r.URL.RawQuery)
-	rq, ok := ismap[r.URL.Path]
-	rq.r = r
-	rq.w = w
-	if !ok {
-		fmt.Fprintf(w, "Unable to find map %s\n", r.URL.Path)
-		log.Printf("Unable to find map %s\n", r.URL.Path)
-		return
-	}
-	if !noDel {
-		defer delete(ismap, r.URL.Path)
-	}
-	n, err := fmt.Sscanf(r.URL.RawQuery, "%d,%d", &rq.mouseX, &rq.mouseY)
-	if err != nil || n != 2 {
-		fmt.Fprintf(w, "n=%d, err=%s\n", n, err)
-		log.Printf("%s ISMAP n=%d, err=%s\n", r.RemoteAddr, n, err)
-		return
-	}
-	log.Printf("%s WrpReq from ISMAP: %+v\n", r.RemoteAddr, rq)
-	if len(rq.url) < 4 {
-		rq.printHTML(printParams{bgColor: "#FFFFFF"})
-		return
-	}
-	rq.navigate()
-	rq.capture()
-}
-
-// Process HTTP requests for images '/img/' url
-func imgServer(w http.ResponseWriter, r *http.Request) {
-	log.Printf("%s IMG Request for %s\n", r.RemoteAddr, r.URL.Path)
-	imgbuf, ok := img[r.URL.Path]
-	if !ok || imgbuf.Bytes() == nil {
-		fmt.Fprintf(w, "Unable to find image %s\n", r.URL.Path)
-		log.Printf("%s Unable to find image %s\n", r.RemoteAddr, r.URL.Path)
-		return
-	}
-	if !noDel {
-		defer delete(img, r.URL.Path)
-	}
-	switch {
-	case strings.HasPrefix(r.URL.Path, ".gif"):
-		w.Header().Set("Content-Type", "image/gif")
-	case strings.HasPrefix(r.URL.Path, ".png"):
-		w.Header().Set("Content-Type", "image/png")
-	}
-	w.Header().Set("Content-Length", strconv.Itoa(len(imgbuf.Bytes())))
-	w.Header().Set("Cache-Control", "max-age=0")
-	w.Header().Set("Expires", "-1")
-	w.Header().Set("Pragma", "no-cache")
-	w.Write(imgbuf.Bytes())
-	w.(http.Flusher).Flush()
-}
-
-// Process HTTP requests for Shutdown via '/shutdown/' url
 func haltServer(w http.ResponseWriter, r *http.Request) {
 	log.Printf("%s Shutdown Request for %s\n", r.RemoteAddr, r.URL.Path)
-	w.Header().Set("Cache-Control", "max-age=0")
-	w.Header().Set("Expires", "-1")
-	w.Header().Set("Pragma", "no-cache")
 	w.Header().Set("Content-Type", "text/plain")
 	fmt.Fprintf(w, "Shutting down WRP...\n")
 	w.(http.Flusher).Flush()
 	time.Sleep(time.Second * 2)
-	cancel()
+	cncl()
+	acncl()
 	srv.Shutdown(context.Background())
 	os.Exit(1)
 }
 
-// returns html template, either from html file or built-in
-func tmpl(t string) string {
+func wrpTemplate(t string) string {
 	var tmpl []byte
 	fh, err := os.Open(t)
 	if err != nil {
 		goto builtin
 	}
-	tmpl, err = ioutil.ReadAll(fh)
+	defer fh.Close()
+
+	tmpl, err = io.ReadAll(fh)
 	if err != nil {
 		goto builtin
 	}
-	log.Printf("Got UI template from %v file\n", t)
+	log.Printf("Got HTML UI template from %v file, size %v \n", t, len(tmpl))
 	return string(tmpl)
 
 builtin:
-	fhs, err := fs.Open("/wrp.html")
+	fhs, err := fs.Open("wrp.html")
 	if err != nil {
 		log.Fatal(err)
 	}
+	defer fhs.Close()
 
-	tmpl, err = ioutil.ReadAll(fhs)
+	tmpl, err = io.ReadAll(fhs)
 	if err != nil {
 		log.Fatal(err)
 	}
-	log.Printf("Got UI template from built-in\n")
+	log.Printf("Got HTML UI template from embed\n")
 	return string(tmpl)
 }
 
-// Main...
 func main() {
-	var addr, fgeom, tHTML string
-	var headless bool
-	var debug bool
 	var err error
-	flag.StringVar(&addr, "l", ":8080", "Listen address:port, default :8080")
-	flag.BoolVar(&headless, "h", true, "Headless mode - hide browser window")
-	flag.BoolVar(&debug, "d", false, "Debug ChromeDP")
-	flag.BoolVar(&noDel, "n", false, "Do not free maps and images after use")
-	flag.StringVar(&defType, "t", "gif", "Image type: gif|png")
-	flag.StringVar(&fgeom, "g", "1152x600x256", "Geometry: width x height x colors, height can be 0 for unlimited")
-	flag.StringVar(&tHTML, "ui", "wrp.html", "HTML template file for the UI")
+	log.SetFlags(log.LstdFlags | log.Lshortfile)
 	flag.Parse()
+	log.Printf("Web Rendering Proxy Version %s (%v)\n", version, runtime.GOARCH)
+	log.Printf("Using embedded ca-certs from github.com/breml/rootcerts")
+	log.Printf("Args: %q", os.Args)
 	if len(os.Getenv("PORT")) > 0 {
-		addr = ":" + os.Getenv(("PORT"))
+		*addr = ":" + os.Getenv(("PORT"))
 	}
-	n, err := fmt.Sscanf(fgeom, "%dx%dx%d", &defGeom.w, &defGeom.h, &defGeom.c)
+	printMyIPs(*addr)
+	n, err := fmt.Sscanf(*fgeom, "%dx%dx%d", &defGeom.w, &defGeom.h, &defGeom.c)
 	if err != nil || n != 3 {
 		log.Fatalf("Unable to parse -g geometry flag / %s", err)
 	}
 
-	opts := append(chromedp.DefaultExecAllocatorOptions[:],
-		chromedp.Flag("headless", headless),
-		chromedp.Flag("hide-scrollbars", false),
-	)
-	actx, acancel := chromedp.NewExecAllocator(context.Background(), opts...)
-	defer acancel()
-	switch debug {
-	case true:
-		ctx, cancel = chromedp.NewContext(actx, chromedp.WithDebugf(log.Printf))
-	default:
-		ctx, cancel = chromedp.NewContext(actx)
-	}
-	defer cancel()
-
-	rand.Seed(time.Now().UnixNano())
+	cncl, acncl = chromedpStart()
+	defer cncl()
+	defer acncl()
 
 	c := make(chan os.Signal)
 	signal.Notify(c, os.Interrupt, syscall.SIGTERM)
 	go func() {
 		<-c
 		log.Printf("Interrupt - shutting down.")
-		cancel()
+		cncl()
+		acncl()
 		srv.Shutdown(context.Background())
 		os.Exit(1)
 	}()
 
 	http.HandleFunc("/", pageServer)
 	http.HandleFunc("/map/", mapServer)
-	http.HandleFunc("/img/", imgServer)
+	http.HandleFunc("/img/", imgServerMap)
+	http.HandleFunc(imgZpfx, imgServerTxt)
 	http.HandleFunc("/shutdown/", haltServer)
 	http.HandleFunc("/favicon.ico", http.NotFound)
 
-	log.Printf("Web Rendering Proxy Version %s\n", version)
-	log.Printf("Args: %q", os.Args)
-	log.Printf("Default Img Type: %v, Geometry: %+v", defType, defGeom)
+	log.Printf("Default Img Type: %v, Geometry: %+v", *defType, defGeom)
 
-	htmlTmpl, err = template.New("wrp.html").Parse(tmpl(tHTML))
+	htmlTmpl, err = template.New("wrp.html").Parse(wrpTemplate(*htmFnam))
 	if err != nil {
 		log.Fatal(err)
 	}
 
-	log.Printf("Starting WRP http server on %s\n", addr)
-	srv.Addr = addr
+	log.Print("Starting WRP http server")
+	srv.Addr = *addr
 	err = srv.ListenAndServe()
 	if err != nil {
 		log.Fatal(err)

wrp.html

@@ -6,12 +6,21 @@
         <FORM ACTION="/" METHOD="POST">
             <INPUT TYPE="TEXT" NAME="url" VALUE="{{.URL}}" SIZE="20">
             <INPUT TYPE="SUBMIT" VALUE="Go">
+            {{ if eq .WrpMode "ismap" }}
             <INPUT TYPE="SUBMIT" NAME="Fn" VALUE="Bk">
             <INPUT TYPE="SUBMIT" NAME="Fn" VALUE="St">
             <INPUT TYPE="SUBMIT" NAME="Fn" VALUE="Re">
+            <INPUT TYPE="SUBMIT" NAME="Fn" VALUE="Up">
+            <INPUT TYPE="SUBMIT" NAME="Fn" VALUE="Dn">
             W <INPUT TYPE="TEXT" NAME="w" VALUE="{{.Width}}" SIZE="4">
             H <INPUT TYPE="TEXT" NAME="h" VALUE="{{.Height}}" SIZE="4">
+            {{ end }}
+            {{ if eq .WrpMode "html" }}
+            S <INPUT TYPE="TEXT" NAME="s" VALUE="{{.MaxSize}}" SIZE="4">
+            {{ end }}
+            {{ if eq .WrpMode "ismap" }}
             Z <SELECT NAME="z">
+                <OPTION DISABLED>Zoom</OPTION>
                 <OPTION VALUE="0.7" {{ if eq .Zoom 0.7}}SELECTED{{end}}>0.7 x</OPTION>
                 <OPTION VALUE="0.8" {{ if eq .Zoom 0.8}}SELECTED{{end}}>0.8 x</OPTION>
                 <OPTION VALUE="0.9" {{ if eq .Zoom 0.9}}SELECTED{{end}}>0.9 x</OPTION>
@@ -20,24 +29,43 @@
                 <OPTION VALUE="1.2" {{ if eq .Zoom 1.2}}SELECTED{{end}}>1.2 x</OPTION>
                 <OPTION VALUE="1.3" {{ if eq .Zoom 1.3}}SELECTED{{end}}>1.3 x</OPTION>
             </SELECT>
-            T <SELECT NAME="t">
-                <OPTION VALUE="gif" {{ if eq .ImgType "gif"}}SELECTED{{end}}>GIF</OPTION>
-                <OPTION VALUE="png" {{ if eq .ImgType "png"}}SELECTED{{end}}>PNG</OPTION>
+            {{ end }}
+            M <SELECT NAME="m">
+                <OPTION DISABLED>Mode</OPTION>
+                <OPTION VALUE="ismap" {{ if eq .WrpMode "ismap"}}SELECTED{{end}}>ISMAP</OPTION>
+                <OPTION VALUE="html" {{ if eq .WrpMode "html"}}SELECTED{{end}}>HTML</OPTION>
             </SELECT>
+            T <SELECT NAME="t">
+                <OPTION DISABLED>Type</OPTION>
+                <OPTION VALUE="gip" {{ if eq .ImgType "gip"}}SELECTED{{end}}>GIP</OPTION>
+                <OPTION VALUE="png" {{ if eq .ImgType "png"}}SELECTED{{end}}>PNG</OPTION>
+                <OPTION VALUE="gif" {{ if eq .ImgType "gif"}}SELECTED{{end}}>GIF</OPTION>
+                <OPTION VALUE="jpg" {{ if eq .ImgType "jpg"}}SELECTED{{end}}>JPG</OPTION>
+            </SELECT>
+            {{ if eq .ImgType "gif" }}
             C <SELECT NAME="c">
+                <OPTION DISABLED>Ncol</OPTION>
                 <OPTION VALUE="256" {{ if eq .NColors 256}}SELECTED{{end}}>256</OPTION>
+                <OPTION VALUE="216" {{ if eq .NColors 216}}SELECTED{{end}}>216</OPTION>
                 <OPTION VALUE="128" {{ if eq .NColors 128}}SELECTED{{end}}>128</OPTION>
                 <OPTION VALUE="64" {{ if eq .NColors 64}}SELECTED{{end}}>64</OPTION>
                 <OPTION VALUE="16" {{ if eq .NColors 16}}SELECTED{{end}}>16</OPTION>
                 <OPTION VALUE="2" {{ if eq .NColors 2}}SELECTED{{end}}>2</OPTION>
             </SELECT>
+            {{ end }}
+            {{ if eq .ImgType "jpg" }}
+            Q <INPUT TYPE="TEXT" NAME="q" VALUE="{{.JQual}}" SIZE="2">%
+            {{ end }}
+            {{ if eq .WrpMode "ismap" }}
             K <INPUT TYPE="TEXT" NAME="k" VALUE="" SIZE="4">
             <INPUT TYPE="SUBMIT" NAME="Fn" VALUE="Bs">
             <INPUT TYPE="SUBMIT" NAME="Fn" VALUE="Rt"><!--
+            <INPUT TYPE="SUBMIT" NAME="Fn" VALUE="All">
             <INPUT TYPE="SUBMIT" NAME="Fn" VALUE="&lt;">
             <INPUT TYPE="SUBMIT" NAME="Fn" VALUE="^">
             <INPUT TYPE="SUBMIT" NAME="Fn" VALUE="v">
             <INPUT TYPE="SUBMIT" NAME="Fn" VALUE="&gt;" SIZE="1">-->
+            {{ end }}
         </FORM>
         <BR>
         {{if .ImgURL}}
@@ -46,11 +74,14 @@
         </A>
         <P>
         {{end}}
+        {{.TeXT}}
 		<FONT SIZE="-2">
 		<A HREF="/?url=https://github.com/tenox7/wrp/&w={{.Width}}&h={{.Height}}&s={{printf "%.1f" .Zoom}}&c={{.NColors}}&t={{.ImgType}}">Web Rendering Proxy {{.Version}}</A> |
 		<A HREF="/shutdown/">Shutdown WRP</A> |
+        {{ if eq .WrpMode "ismap" }}
 		<A HREF="/">Page Height: {{.PageHeight}}</A> |
 		<A HREF="/">Img Size: {{.ImgSize}}</A>
-		</FONT>
+        {{end}}
+    </FONT>
     </BODY>
-</HTML>
+</HTML>