Via environment variables or via toml file.

Environment vars

  • PREST_HTTP_HOST (default
  • PREST_HTTP_PORT or PORT (PORT is cloud factor, when declaring this variable overwritten PREST_HTTP_PORT, default 3000)
  • PREST_PG_HOST (default
  • PREST_PG_PORT (default 5432)
  • PREST_PG_URL or DATABASE_URL (cloud factor, when declaring this variable all the previous connection fields are overwritten)
  • PREST_JWT_WHITELIST (default /auth)
  • PREST_AUTH_ENABLED (default false)
  • PREST_AUTH_ENCRYPT (default MD5)
  • PREST_AUTH_TYPE (default body)
  • PREST_AUTH_TABLE (default prest_users)
  • PREST_AUTH_USERNAME (default username)
  • PREST_AUTH_PASSWORD (default password)
  • PREST_SSL_MODE (default require)


Optionally the pREST can be configured by TOML file.

You can follow this sample and create your own prest.toml file and put this on the same folder that you run prest command.

migrations = "./migrations"

# debug = true
# enabling debug mode will disable JWT authorization

port = 6000 
# Port 6000 is blocked on windows. You must change to 8080 or any unblocked port

key = "secret"
algo = "HS256"

enabled = true
type = "body"
encrypt = "MD5"
table = "prest_users"
username = "username"
password = "password"

host = ""
user = "postgres"
pass = "mypass"
port = 5432
database = "prest"
## or used cloud factor
# URL = "postgresql://user:pass@localhost/mydatabase/?sslmode=disable"

mode = "disable"
sslcert = "./PATH"
sslkey = "./PATH"
sslrootcert = "./PATH"



JWT middleware is enabled by default. To disable JWT need to set default to false. Enabling debug mode will also disable it.

default = false
Authorization: Bearer eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJzdWIiOiIxMjM0NTY3ODkwIiwibmFtZSI6IkpvaG4gRG9lIiwiYWRtaW4iOnRydWV9.TJVA95OrM7E2cBab30RMHrHDcEfxjoYZgeFONFh7HgQ

The HS256 algorithm is used by default.

The JWT algorithm can be specified by using either the environment variable PREST_JWT_ALGO or the algo parameter in the section [jwt] of the prest.toml configuration file.

The supported signing algorithms are:

White list

By default the endpoints /auth do not require JWT, the whitelist option serves to configure which endpoints will not ask for jwt token

default = true
whitelist = ["\/auth", "\/ping", "\/ping\/.*"]


pREST has support in jwt token generation based on two fields (example user and password), being possible to use an existing table from your database to login configuring some parameters in the configuration file (or environment variable), by default this feature is disabled.

enabled = true
type = "body"
encrypt = "MD5"
table = "prest_users"
username = "username"
password = "password"
Name Description
enabled Boolean field that activates or deactivates token generation endpoint support
type Type that will receive the login, support for body and http basic authentication
encrypt Type of encryption used in password field, support for MD5 and SHA1
table Table name we will consult (query)
username User field that will be consulted - if your software uses email just abstract name username (at pREST code level it was necessary to define an internal standard)
password Password field that will be consulted

to validate all endpoints with generated jwt token must be activated jwt option


There is 4 options to set on ssl mode:

  • require - Always SSL (skip verification) by default
  • disable - SSL off
  • verify-ca - Always SSL (verify that the certificate presented by the server was signed by a trusted CA)
  • verify-full - Always SSL (verify that the certification presented by the server was signed by a trusted CA and the server host name matches the one in the certificate)

Debug Mode

Set environment variable PREST_DEBUG or debug=true on top of prest.toml file.



--url and --path flags are optional if pREST configurations already set.

# env var for migrations directory

# apply all available migrations
prestd migrate --url driver://url --path ./migrations up

# roll back all migrations
prestd migrate --url driver://url --path ./migrations down

# roll back the most recently applied migration, then run it again.
prestd migrate --url driver://url --path ./migrations redo

# run down and then up command
prestd migrate --url driver://url --path ./migrations reset

# show the current migration version
prestd migrate --url driver://url --path ./migrations version

# apply the next n migrations
prestd migrate --url driver://url --path ./migrations next +1
prestd migrate --url driver://url --path ./migrations next +2
prestd migrate --url driver://url --path ./migrations next +n

# roll back the previous n migrations
prestd migrate --url driver://url --path ./migrations next -1
prestd migrate --url driver://url --path ./migrations next -2
prestd migrate --url driver://url --path ./migrations next -n

# create or remove default pREST authentication table
prestd migrate up auth
prestd migrate down auth