thumbor's configuration file is just a regular python script that thumbor loads.

In order to get a commented configuration file, just run:

thumbor-config > ./thumbor.conf

Extensibility Section

LOADER

The loader is responsible for retrieving the source image that thumbor will work with. This configuration defines the module that thumbor will use for it. This must be a full namespace module (a.k.a. python has to be able to import it).

i.e.: thumbor.loaders.http_loader

STORAGE

The storage is responsible for storing the source image bytes and related metadata (face-detection, encryption and such) so that we don't keep loading it every time. This must be a full namespace module (a.k.a. python has to be able to import it).

i.e.: thumbor.storages.file_storage

MIXED_STORAGE_FILE_STORAGE

If you are using thumbor's mixed storage (thumbor.storages.mixed_storage), this is where you specify the storage that will be used to store images. This must be a full namespace module (a.k.a. python has to be able to import it).

i.e.: thumbor.storages.file_storage

MIXED_STORAGE_CRYPTO_STORAGE

If you are using thumbor's mixed storage (thumbor.storages.mixed_storage), this is where you specify the storage that will be used to store cryptography information. This must be a full namespace module (a.k.a. python has to be able to import it).

i.e.: thumbor.storages.redis_storage

MIXED_STORAGE_DETECTOR_STORAGE

If you are using thumbor's mixed storage (thumbor.storages.mixed_storage), this is where you specify the storage that will be used to store facial and feature detection results. This must be a full namespace module (a.k.a. python has to be able to import it).

i.e.: thumbor.storages.mongo_storage

ENGINE

The engine is responsible for transforming the image. This must be a full namespace module (a.k.a. python has to be able to import it).

Thumbor ships with three imaging engines:

thumbor.engines.pil
thumbor.engines.opencv
thumbor.engines.graphicsmagick
~~thumbor.engines.imagemagick~~ (This engine isn't supported anymore, check #52)

RESULT_STORAGE

The result storage is responsible for storing the resulting image with the specified parameters (think of it as a cache), so that we don't keep processing it every time a request comes in. This must be a full namespace module (a.k.a. python has to be able to import it).

i.e.: thumbor.result_storages.file_storage

Filters Section

In order to specify the filters that thumbor will use, you need a configuration key called FILTERS. This is a regular python list with the full names (names that python can import) of the filter modules you want to use.

An example:

FILTERS = [
    'thumbor.filters.brightness',
    'thumbor.filters.contrast',
    'thumbor.filters.rgb',
    'thumbor.filters.round_corner',
    'thumbor.filters.quality',
    'thumbor.filters.noise',
    'thumbor.filters.watermark',
]

Metadata Section

META_CALLBACK_NAME

If you want thumbor to use JSONP for image metadata instead of using JSON, just set this variable to the callback name you want.

i.e.: "thumbor_callback"

Face and Feature Detection Section

DETECTORS

This options specifies the detectors that should run the image to check for focal points.

i.e.: ["thumbor.detectors.face_detector", "thumbor.detectors.feature_detector"]

FACE_DETECTOR_CASCADE_FILE

This option specifies the cascade (XML) file path to train openCV to find faces.

i.e.: haarcascade_frontalface_alt.xml

Imaging Section

ALLOWED_SOURCES

This configuration defines the source of the images that thumbor will load. This is only used in the HttpLoader (check the LOADER configuration above).

i.e.: ALLOWED_SOURCES=['http://s.glbimg.com']

Another example with wildcards:

ALLOWED_SOURCES = ['.+.globo.com', '.+.glbimg.com']

This is to get any images that are in *.globo.com or *.glbimg.com and it will fail with any other domains.

MAX_WIDTH and MAX_HEIGHT

These define the box that the resulting image for thumbor must fit-in. This means that no image that thumbor generates will have a width larger than MAX_WIDTH or height larger than MAX_HEIGHT.

i.e.:

MAX_WIDTH = 1200
MAX_HEIGHT = 800

MIN_WIDTH and MIN_HEIGHT

These define the box that the resulting image for thumbor must fit-in. This means that no image that thumbor generates will have a width smaller than MIN_WIDTH or height smaller than MIN_HEIGHT.

i.e.:

MIN_WIDTH = 1
MIN_HEIGHT = 1

QUALITY

This option defines the quality that JPEG images will be generated with. It defaults to 80.

i.e.: QUALITY = 90

MAX_AGE

This option defines the number of seconds that images should remain in the browser's cache. It relates directly with the Expires and Cache-Control headers.

i.e.: MAX_AGE = 24 * 60 * 60 # A day of caching

Setting MAX_AGE to False will cause Thumbor to not set the Expires and Cache-Control headers. This is useful when Thumbor is working as a reverse proxy and headers already exist.

MAX_AGE_TEMP_IMAGE

When an image has some error in its detection or it has deferred queueing, it's convenient to set a much lower expiration time for the image cache. This way the browser will request the proper image faster.

This option defines the number of seconds that images in this scenario should remain in the browser's cache. It relates directly with the Expires and Cache-Control headers.

i.e.: MAX_AGE_TEMP_IMAGE = 60 # A minute of caching

RESPECT_ORIENTATION

If this option is set to True, thumbor will reorient the image according to it's EXIF Orientation tag (if one can be found). This options defaults to False.

The operations performed in the image are as follow (considering the value of the Orientation EXIF tag):

Nothing
Flips the image horizontally
Rotates the image 180 degrees
Flips the image vertically
Flips the image vertically and rotates 270 degrees
Rotates the image 270 degrees
Flips the image horizontally and rotates 270 degrees
Rotates the image 90 degrees

i.e.: RESPECT_ORIENTATION = False

ALLOW_ANIMATED_GIFS

This option indicates whether animated gifs should be supported.

i.e.: ALLOW_ANIMATED_GIFS = True

USE_GIFSICLE_ENGINE

This option indicates whether gifsicle should be used for all gif images, instead of the actual imaging engine. This defaults to False.

When using gifsicle thumbor will generate proper animated gifs, as well as static gifs with the smallest possible size.

i.e.: USE_GIFSICLE_ENGINE = True

WARNING: When using gifsicle engine, filters will be skipped. Thumbor will not do smart cropping as well.

AUTO_WEBP

This option indicates whether thumbor should send WebP images automatically if the request comes with an "Accept" header that specifies that the browser supports "image/webp".

i.e.: AUTO_WEBP = True

Queueing - Redis

REDIS_QUEUE_SERVER_HOST

Server host for the queued redis detector.

i.e.: REDIS_QUEUE_SERVER_HOST = 'localhost'

REDIS_QUEUE_SERVER_PORT

Server port for the queued redis detector.

i.e.: REDIS_QUEUE_SERVER_PORT = 6379

REDIS_QUEUE_SERVER_DB

Server database index for the queued redis detector

i.e.: REDIS_QUEUE_SERVER_DB = 0

REDIS_QUEUE_SERVER_PASSWORD

Server password for the queued redis detector

i.e.: REDIS_QUEUE_SERVER_PASSWORD = None

Queueing - Amazon SQS

SQS_QUEUE_KEY_ID

Amazon AWS key id.

i.e.: SQS_QUEUE_KEY_ID = None

SQS_QUEUE_KEY_SECRET

Amazon AWS key secret.

i.e.: SQS_QUEUE_KEY_SECRET = None

SQS_QUEUE_REGION

Amazon AWS SQS region.

i.e.: SQS_QUEUE_REGION = 'us-east-1'

Security Section

SECURITY_KEY

This option specifies the security key that thumbor uses to sign secure URLs.

i.e.: 1234567890123456

ALLOW_UNSAFE_URL

This option specifies that the /unsafe url should be available in this thumbor instance. It is boolean (True or False).

ALLOW_OLD_URLS

This option specifies that the format prior to 3.0.0-release-changes should be allowed. It defaults to True.

THIS OPTION IS DEPRECATED AND WILL DEFAULT TO FALSE IN THE NEXT MAJOR.

Loader Options Section

FILE_LOADER_ROOT_PATH

In case you are using thumbor's built-in file loader, this is the option that allows you to specify where to find the images.

HTTP_LOADER_DEFAULT_USER_AGENT

This option allows users to specify the default user-agent that thumbor will send when requesting images with the HTTP Loader. Defaults to 'Thumbor/' (like Thumbor/3.10.0).

HTTP_LOADER_FORWARD_USER_AGENT

This option tells thumbor to forward the request user agent when requesting images using the HTTP Loader. Defaults to False.

Storage Options Section

STORAGE_EXPIRATION_SECONDS

This options specifies the default expiration time in seconds for the storage.

i.e.: 60 (1 minute), 0 (never caches) or None (never expires)

STORES_CRYPTO_KEY_FOR_EACH_IMAGE

This option specifies whether thumbor should store the key for each image (thus allowing the image to be found even if the security key changes). This is a boolean flag (True or False).

File Storage Section

FILE_STORAGE_ROOT_PATH

In case you are using thumbor's built-in file storage, this is the option that allows you to specify where to save the images.

MongoDB Storage Section

MONGO_STORAGE_SERVER_HOST

This is the option that specifies the host for mongodb.

i.e.: 127.0.0.1

MONGO_STORAGE_SERVER_PORT

This is the option that specifies the port where mongodb is running in.

i.e.: 27017

MONGO_STORAGE_SERVER_DB

This is the option that specifies the database for mongodb.

i.e.: thumbor

MONGO_STORAGE_SERVER_COLLECTION

This is the option that specifies the collection for thumbor's documents.

i.e.: images

Redis Storage Section

REDIS_STORAGE_SERVER_HOST

This option specifies the host server for Redis.

i.e.: localhost

REDIS_STORAGE_SERVER_PORT

This option specifies the port that redis is listening in.

i.e.: 6379

REDIS_STORAGE_SERVER_DB

This option specifies the database that thumbor should use.

i.e.: 0

REDIS_STORAGE_SERVER_PASSWORD

This option specifies the password that thumbor should use to authenticate with redis.

i.e.: my-redis-password

Memcached Storage Section

MEMCACHE_STORAGE_SERVERS

List of Memcache storage server hosts.

i.e.: MEMCACHE_STORAGE_SERVERS = ['localhost:11211']

Result Storage Section

RESULT_STORAGE_EXPIRATION_SECONDS

Expiration in seconds of generated images in the result storage.

i.e.: RESULT_STORAGE_EXPIRATION_SECONDS = 0

RESULT_STORAGE_FILE_STORAGE_ROOT_PATH

Path where the Result storage will store generated images.

i.e.: RESULT_STORAGE_FILE_STORAGE_ROOT_PATH = '/tmp/thumbor/result_storage'

RESULT_STORAGE_STORES_UNSAFE

Indicates whether unsafe requests should also be stored in the Result Storage.

i.e.: RESULT_STORAGE_STORES_UNSAFE = False

Logging

###THUMBOR_LOG_FORMAT

This option specifies the format to be used by logging messages sent from thumbor.

i.e.: '%(asctime)s %(name)s:%(levelname)s %(message)s'

###THUMBOR_LOG_DATE_FORMAT

This option specifies the date format to be used by logging messages sent from thumbor.

i.e.: '%Y-%m-%d %H:%M:%S'

Error Handling

USE_CUSTOM_ERROR_HANDLING

This configuration indicates whether thumbor should use a custom error handler.

i.e.: USE_CUSTOM_ERROR_HANDLING = False

ERROR_HANDLER_MODULE

Error reporting module. Needs to contain a class called ErrorHandler with a handle_error(context, handler, exception) method.

i.e.: ERROR_HANDLER_MODULE = 'thumbor.error_handlers.sentry'

Error Handling - Sentry

SENTRY_DSN_URL

Sentry thumbor project dsn. i.e.: http://5a63d58ae7b94f1dab3dee740b301d6a:73eea45d3e8649239a973087e8f21f98@localhost:9000/2

i.e.: SENTRY_DSN_URL = ''

Upload

UPLOAD_MAX_SIZE

Max size in Kb for images uploaded to thumbor.

i.e.: UPLOAD_MAX_SIZE = 0

UPLOAD_ENABLED

Indicates whether thumbor should enable File uploads.

i.e.: UPLOAD_ENABLED = False

UPLOAD_PHOTO_STORAGE

The type of storage to store uploaded images with.

i.e.: UPLOAD_PHOTO_STORAGE = 'thumbor.storages.file_storage'

UPLOAD_DELETE_ALLOWED

Indicates whether image deletion should be allowed.

i.e.: UPLOAD_DELETE_ALLOWED = False

UPLOAD_PUT_ALLOWED

Indicates whether image overwrite should be allowed.

i.e.: UPLOAD_PUT_ALLOWED = False

UPLOAD_DEFAULT_FILENAME

Default filename for image uploaded.

i.e.: UPLOAD_DEFAULT_FILENAME = 'image'

Example of Configuration File

################################### Logging ####################################

## Log Format to be used by thumbor when writing log messages.
## Defaults to: %(asctime)s %(name)s:%(levelname)s %(message)s
#THUMBOR_LOG_FORMAT = '%(asctime)s %(name)s:%(levelname)s %(message)s'

## Date Format to be used by thumbor when writing log messages.
## Defaults to: %Y-%m-%d %H:%M:%S
#THUMBOR_LOG_DATE_FORMAT = '%Y-%m-%d %H:%M:%S'

################################################################################


################################### Imaging ####################################

## Max width in pixels for images read or generated by thumbor
## Defaults to: 0
#MAX_WIDTH = 0

## Max height in pixels for images read or generated by thumbor
## Defaults to: 0
#MAX_HEIGHT = 0

## Min width in pixels for images read or generated by thumbor
## Defaults to: 1
#MIN_WIDTH = 1

## Min width in pixels for images read or generated by thumbor
## Defaults to: 1
#MIN_HEIGHT = 1

## Allowed domains for the http loader to download. These are regular
## expressions.
## Defaults to: []
#ALLOWED_SOURCES = #    [
#    ]


## Quality index used for generated JPEG images
## Defaults to: 80
#QUALITY = 80

## Max AGE sent as a header for the image served by thumbor in seconds
## Defaults to: 86400
#MAX_AGE = 86400

## Indicates the Max AGE header in seconds for temporary images (images that
## haven't been detected yet)
## Defaults to: 0
#MAX_AGE_TEMP_IMAGE = 0

## Indicates whether thumbor should rotate images that have an Orientation EXIF
## header
## Defaults to: False
#RESPECT_ORIENTATION = False

## Indicates whether thumbor should enable the EXPERIMENTAL support for animated
## gifs.
## Defaults to: True
#ALLOW_ANIMATED_GIFS = True

################################################################################


################################ Extensibility #################################

## The loader thumbor should use to load the original image. This must be the
## full name of a python module (python must be able to import it)
## Defaults to: thumbor.loaders.http_loader
#LOADER = 'thumbor.loaders.http_loader'

## The file storage thumbor should use to store original images. This must be the
## full name of a python module (python must be able to import it)
## Defaults to: thumbor.storages.file_storage
#STORAGE = 'thumbor.storages.file_storage'

## The result storage thumbor should use to store generated images. This must be
## the full name of a python module (python must be able to import it)
## Defaults to: None
#RESULT_STORAGE = None

## The imaging engine thumbor should use to perform image operations. This must
## be the full name of a python module (python must be able to import it)
## Defaults to: thumbor.engines.pil
#ENGINE = 'thumbor.engines.pil'

################################################################################


################################### Security ###################################

## The security key thumbor uses to sign image URLs
## Defaults to: MY_SECURE_KEY
#SECURITY_KEY = 'MY_SECURE_KEY'

## Indicates if the /unsafe URL should be available
## Defaults to: True
#ALLOW_UNSAFE_URL = True

## Indicates if encrypted (old style) URLs should be allowed
## Defaults to: True
#ALLOW_OLD_URLS = True

################################################################################


################################# File Loader ##################################

## The root path where the File Loader will try to find images
## Defaults to: /tmp
#FILE_LOADER_ROOT_PATH = '/tmp'

################################################################################


################################# File Storage #################################

## Expiration in seconds for the images in the File Storage. Defaults to one
## month
## Defaults to: 2592000
#STORAGE_EXPIRATION_SECONDS = 2592000

## Indicates whether thumbor should store the signing key for each image in the
## file storage. This allows the key to be changed and old images to still be
## properly found
## Defaults to: False
#STORES_CRYPTO_KEY_FOR_EACH_IMAGE = False

## The root path where the File Storage will try to find images
## Defaults to: /var/folders/th/z6vmj34j1gngpvwl5fg5t9440000gp/T/thumbor/storage
#FILE_STORAGE_ROOT_PATH = '/var/folders/th/z6vmj34j1gngpvwl5fg5t9440000gp/T/thumbor/storage'

################################################################################


#################################### Upload ####################################

## Max size in Kb for images uploaded to thumbor
## Aliases: MAX_SIZE
## Defaults to: 0
#UPLOAD_MAX_SIZE = 0

## Indicates whether thumbor should enable File uploads
## Aliases: ENABLE_ORIGINAL_PHOTO_UPLOAD
## Defaults to: False
#UPLOAD_ENABLED = False

## The type of storage to store uploaded images with
## Aliases: ORIGINAL_PHOTO_STORAGE
## Defaults to: thumbor.storages.file_storage
#UPLOAD_PHOTO_STORAGE = 'thumbor.storages.file_storage'

## Indicates whether image deletion should be allowed
## Aliases: ALLOW_ORIGINAL_PHOTO_DELETION
## Defaults to: False
#UPLOAD_DELETE_ALLOWED = False

## Indicates whether image overwrite should be allowed
## Aliases: ALLOW_ORIGINAL_PHOTO_PUTTING
## Defaults to: False
#UPLOAD_PUT_ALLOWED = False

## Default filename for image uploaded
## Defaults to: image
#UPLOAD_DEFAULT_FILENAME = 'image'

################################################################################


############################### MongoDB Storage ################################

## MongoDB storage server host
## Defaults to: localhost
#MONGO_STORAGE_SERVER_HOST = 'localhost'

## MongoDB storage server port
## Defaults to: 27017
#MONGO_STORAGE_SERVER_PORT = 27017

## MongoDB storage server database name
## Defaults to: thumbor
#MONGO_STORAGE_SERVER_DB = 'thumbor'

## MongoDB storage image collection
## Defaults to: images
#MONGO_STORAGE_SERVER_COLLECTION = 'images'

################################################################################


################################ Redis Storage #################################

## Redis storage server host
## Defaults to: localhost
#REDIS_STORAGE_SERVER_HOST = 'localhost'

## Redis storage server port
## Defaults to: 6379
#REDIS_STORAGE_SERVER_PORT = 6379

## Redis storage database index
## Defaults to: 0
#REDIS_STORAGE_SERVER_DB = 0

## Redis storage server password
## Defaults to: None
#REDIS_STORAGE_SERVER_PASSWORD = None

################################################################################


############################### Memcache Storage ###############################

## List of Memcache storage server hosts
## Defaults to: ['localhost:11211']
#MEMCACHE_STORAGE_SERVERS = #    [
#        'localhost:11211',
#    ]


################################################################################


################################ Mixed Storage #################################

## Mixed Storage file storage. This must be the full name of a python module
## (python must be able to import it)
## Defaults to: thumbor.storages.no_storage
#MIXED_STORAGE_FILE_STORAGE = 'thumbor.storages.no_storage'

## Mixed Storage signing key storage. This must be the full name of a python
## module (python must be able to import it)
## Defaults to: thumbor.storages.no_storage
#MIXED_STORAGE_CRYPTO_STORAGE = 'thumbor.storages.no_storage'

## Mixed Storage detector information storage. This must be the full name of a
## python module (python must be able to import it)
## Defaults to: thumbor.storages.no_storage
#MIXED_STORAGE_DETECTOR_STORAGE = 'thumbor.storages.no_storage'

################################################################################


##################################### Meta #####################################

## The callback function name that should be used by the META route for JSONP
## access
## Defaults to: None
#META_CALLBACK_NAME = None

################################################################################


################################## Detection ###################################

## List of detectors that thumbor should use to find faces and/or features. All
## of them must be full names of python modules (python must be able to import
## it)
## Defaults to: []
#DETECTORS = #    [
#    ]


## The cascade file that opencv will use to detect faces
## Defaults to: haarcascade_frontalface_alt.xml
#FACE_DETECTOR_CASCADE_FILE = 'haarcascade_frontalface_alt.xml'

################################################################################


################################### Filters ####################################

## List of filters that thumbor will allow to be used in generated images. All of
## them must be full names of python modules (python must be able to import
## it)
## Defaults to: []
#FILTERS = #    [
#    ]


################################################################################


################################ Result Storage ################################

## Expiration in seconds of generated images in the result storage
## Defaults to: 0
#RESULT_STORAGE_EXPIRATION_SECONDS = 0

## Path where the Result storage will store generated images
## Defaults to: /var/folders/th/z6vmj34j1gngpvwl5fg5t9440000gp/T/thumbor/result_storage
#RESULT_STORAGE_FILE_STORAGE_ROOT_PATH = '/var/folders/th/z6vmj34j1gngpvwl5fg5t9440000gp/T/thumbor/result_storage'

## Indicates whether unsafe requests should also be stored in the Result Storage
## Defaults to: False
#RESULT_STORAGE_STORES_UNSAFE = False

################################################################################


############################ Queued Redis Detector #############################

## Server host for the queued redis detector
## Defaults to: localhost
#REDIS_QUEUE_SERVER_HOST = 'localhost'

## Server port for the queued redis detector
## Defaults to: 6379
#REDIS_QUEUE_SERVER_PORT = 6379

## Server database index for the queued redis detector
## Defaults to: 0
#REDIS_QUEUE_SERVER_DB = 0

## Server password for the queued redis detector
## Defaults to: None
#REDIS_QUEUE_SERVER_PASSWORD = None

################################################################################


############################# Queued SQS Detector ##############################

## AWS key id
## Defaults to: None
#SQS_QUEUE_KEY_ID = None

## AWS key secret
## Defaults to: None
#SQS_QUEUE_KEY_SECRET = None

## AWS SQS region
## Defaults to: us-east-1
#SQS_QUEUE_REGION = 'us-east-1'

################################################################################


#################################### Errors ####################################

## This configuration indicates whether thumbor should use a custom error
## handler.
## Defaults to: False
#USE_CUSTOM_ERROR_HANDLING = False

## Error reporting module. Needs to contain a class called ErrorHandler with a
## handle_error(context, handler, exception) method.
## Defaults to: thumbor.error_handlers.sentry
#ERROR_HANDLER_MODULE = 'thumbor.error_handlers.sentry'

################################################################################


############################### Errors - Sentry ################################

## Sentry thumbor project dsn. i.e.: http://5a63d58ae7b94f1dab3dee740b301d6a:73ee
## a45d3e8649239a973087e8f21f98@localhost:9000/2
## Defaults to: 
#SENTRY_DSN_URL = ''

################################################################################