Environment variables
Below is the list of useful environment variables and their default values:
FLET_APP_CONSOLE
The path to the application's console log file (console.log
) in the temporary storage directory.
Its value is set in production mode.
FLET_APP_STORAGE_DATA
A directory for the storage of persistent application data that is preserved between app updates. It is already pre-created and its location depends on the platform the app is running on.
FLET_APP_STORAGE_TEMP
A directory for the storage of temporary application files, i.e. cache. It is already pre-created and its location depends on the platform the app is running on.
FLET_ASSETS_DIR
Absolute path to app "assets" directory.
Defaults to assets
.
FLET_CLI_NO_RICH_OUTPUT
Whether to disable rich output in the console.
Default is "false"
.
FLET_PLATFORM
The platform on which the application is running.
Its value is one of the following: "android"
, "ios"
, "linux"
, "macos"
, "windows"
or "fuchsia"
.
FLET_CLI_SKIP_FLUTTER_DOCTOR
Whether to skip running flutter doctor
when a build fails.
Default is False
.
FLET_FORCE_WEB_SERVER
Set to true
to force running app as a web app. Automatically set on headless Linux hosts.
FLET_OAUTH_CALLBACK_HANDLER_ENDPOINT
Custom path for OAuth handler.
Defaults to /oauth_callback
.
FLET_OAUTH_STATE_TIMEOUT
Maximum allowed time (in seconds) to complete OAuth web flow.
Defaults to 600
.
FLET_MAX_UPLOAD_SIZE
Maximum allowed size (in bytes) of uploaded files.
Default is unlimited.
FLET_SECRET_KEY
A secret key to sign temporary upload URLs.
FLET_SERVER_IP
IP address to listen web app on, e.g. 127.0.0.1
.
Defaults to 0.0.0.0
- bound to all server IPs.
FLET_SERVER_PORT
TCP port to run app on. 8000
if the program is running on a Linux server or FLET_FORCE_WEB_SERVER
is set; otherwise
random port.
FLET_SERVER_UDS_PATH
The Unix Domain Socket (UDS) path for the Flet server. It enables inter-process communication on Unix-based systems, with its value being a socket file path in the format flet_<pid>.sock
.
FLET_SESSION_TIMEOUT
Session lifetime in seconds. Default is 3600
.
FLET_UPLOAD_DIR
Absolute path to app "upload" directory.
FLET_UPLOAD_HANDLER_ENDPOINT
Custom path for upload handler. Default is /upload
.
FLET_WEB_APP_PATH
A URL path after domain name to host web app under, e.g. /apps/myapp
. Default is /
- host app in the root.
FLET_WEBSOCKET_HANDLER_ENDPOINT
Custom path for WebSocket handler. Default is /ws
.
FLET_WEB_RENDERER
Web rendering mode: canvaskit
(default), html
or auto
.
FLET_WEB_USE_COLOR_EMOJI
Set to True
, true
or 1
to load web font with colorful emojis.
FLET_WEB_ROUTE_URL_STRATEGY
The URL strategy of the web application: path
(default) or hash
.
Setting Boolean values
The boolean True
is represented by one of the following string values: "true"
, "1"
or "yes"
.
Any other value will be interpreted as False
.