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Application server for use with SAS Viya

This package has two servers:

  1. restaf-server - Use this for developing an app server for web applications(see packages/appjs)
    • alternate name: viya-aappserverjs to be consisetent with item 2 below
  2. viya-apiserverjs - Use this to develop rest api servers(see packages/apijs)

The restaf-server will be soon super-seeded by viya-app-server with better support for protecting all routes

Basic configuration

  1. Set the default settings in Dockerfile. This will ensure these are set when you build containers.
  2. Use the .env file when running bare-os and docker-compose file to set run time overrides.

Sample env file

VIYA_SERVER=<your viya server>
APPHOST=localhost < can also be dns name of your server. ex: viyaiscool.unx.sas.com>
APPPORT=5000   <any port of your choice>

Sample Dockerfile

FROM node:12.16.1-alpine
LABEL maintainer="your email"
WORKDIR /usr/src/app
COPY . .
RUN npm install
# RUN npm run build (if you have to build something)
EXPOSE 8080
ENV APPHOST=0.0.0.0

#######################################################################
# You can override these in .env file or docker-compose file
########################################################################

ENV APPNAME=viyaapp
ENV AUTHFLOW=code
ENV CLIENTID=viyaapp
ENV CLIENTSECRET=secret

# The following are defaults 
ENV APPLOC=./public
ENV APPENTRY=index.html
# if your app takes advantage of appenv.js to pass configuration to the web application 
# ENV APPENV=appenv.js 

# See notes below on running with SSL enabled
ENV TLS_CREATE="C:US,ST:NC,L:Cary,O:yourcompany,OU:STO,CN:localhost"
ENV SAMESITE=None,secure
ENV NODE_TLS_REJECT_UNAUTHORIZED=0

#####################################################################
CMD ["npx", "@sassoftware/viya-appserverjs"]

Running with SSL enabled -- Recommended

This is the recommended setting. This will also make browsers like Chrome run with the SAMESITE settings set to Default - your users will thank you.

Make sure you specify the VIYA_SERVER with a protocol of https.

The following are the key settings:

  1. SAMESITE
    • The recommend setting is None,secure.
    • If not set the servers will default to None,false - this is prmarily for backward compatability.
ENV SAMESITE=None,secure

You should be able to set these browser settings to default:

  • SameSite by default cookies
  • Coookies with SameSite must be secure

I am not really sure about the impact of setting for new Schemeful Same-site option to default. So enable it at your own risk.

  1. The certificates for SSL can be set in one of the following ways(all values are just examples).
  • Let server create a temporary unsigned certificate

    ENV TLS_CREATE=C:US,ST:NC,L:Cary,O:YourCompany,OU:yourgroup,CN:localhost
  • Provide your own key and certificate key

ENV TLS_KEY=../certs/self/key.pem
ENV TLS_CERT=../certs/self/certificate.pem
  • Provide key and certificate as a pfx file
ENV TLS_PFX=../certs/sascert/sascert2.pfx

Running without SSL

Make sure your specify VIYA_SERVER with a protocol of http

  1. SAMESITE
    • Set this as None,false
ENV SAMESITE=None,false

You might also have to disable all the SAMESITE options in your browser:

  • SameSite by default cookies
  • Coookies with SameSite must be secure
  • Schemeful Same-site

CLIENTID and CLIENTSECRET

Recommend you use the authorization_flow code. Set the redirect url to this pattern:

://:/ ex: https://localhost:5000/viyaapp

If you also run without ssl enabled then set it to something like this: https://localhost:5000/viyaapp,http://localhost:5000/viyaapp

If you are using port 443 for ssl-enabled, then add this redirect also https://localhost/viyaapp

Viya Server Configuration and more

Please see https://github.com/sassoftware/restaf-server/wiki

About

restaf-server is a server designed specifically to work with SAS Viya

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