WebTry Server

Allows trying out Skia code in the browser. Run a local webserver and from the pages it serves try out Skia code and see the results immediately.

Running Locally

One time setup:

$ export SKIA_ROOT=path_to_your_skia_source
$ export WEBTRY_ROOT=path_to_your_webtry_source
$ export WEBTRY_INOUT=path_to_a_writeable_directory
$ mkdir -p $WEBTRY_INOUT

Then, to run:

$ go get -d
$ ./build
$ ./webtry

Then visit http://localhost:8000 in your browser.

Only tested under linux and MacOS, doubtful it will work on other platforms.

Server Setup

Please refer to compute_engine_scripts/webtry/README under the repo for instructions on creating and destroying the instance. The rest of this document is what to do once the instance is created.

Do the first time

The following things only need to be done once.

  1. SSH into the server as default.

  2. sudo apt-get install git

  3. git clone https://skia.googlesource.com/buildbot

  4. cd ~/buildbot/webtry/setup

  5. ./webtry_setup.sh

  6. Add the following to the /etc/schroot/minimal/fstab:

none /run/shm tmpfs rw,nosuid,nodev,noexec 0 0 /home/webtry/inout /skia_build/inout none rw,bind 0 0 /home/webtry/cache /skia_build/cache none rw,bind 0 0

  1. Change /etc/monit/monitrc to:

    set daemon 2

then run the following so it applies:

sudo /etc/init.d/monit restart

This means that monit will poll every two seconds that our application is up and running.

  1. Set the TCP keepalive. For more info see: https://developers.google.com/cloud-sql/docs/gce-access

    sudo sh -c ‘echo 60 > /proc/sys/net/ipv4/tcp_keepalive_time’

To update the code

  1. SSH into the server as default.
  2. cd ~/buildbot/webtry/setup
  3. git pull
  4. ./webtry_setup.sh

Third Party Code

  • res/js/polyfill.js - Various JS polyfill libraries. To rebuild or update see poly/README.md.