thumbor-dash 0.0.9

A thumbor server extension for DASH

thumbor_dash

A thumbor server extension for DASH

Setup

Requirements

• Python >= 3.9
• Pip >= 21.1
• Thumbor == 7.0.0a5

See the requirements for setting up thumbor in the documentation

1. Install thumbor_dash

pip install thumbor_dash

Note: thumbor_dash, thumbor, and other required dependencies will be installed

2. Create a thumbor configuration file

thumbor-config > thumbor.conf

3. Add these lines to thumbor.conf file

# Set allowed dimensions
MIN_WIDTH = 1
MIN_HEIGHT = 1
MAX_WIDTH = 1200
MAX_HEIGHT = 800

# Set security key
SECURITY_KEY = "0"

# Use custom Url signing method (sha256)
URL_SIGNER = 'thumbor_dash.url_signers.base64_hmac_sha256'

# Allow only signed URL
ALLOW_UNSAFE_URL = False

# Set user moderation rules
REQUEST_TIME_LIMIT = 1 # time between requests in minutes
USAGE_VIOLATION_LIMIT = 5 # total number of times a requester can violate the time limit before ban
BAN_DURATION = 10 # requester ban duration in minutes

# Use custom error handling
USE_CUSTOM_ERROR_HANDLING = True
ERROR_HANDLER_MODULE = 'thumbor_dash.error_handlers.sentry'

# Custom Service App Class
APP_CLASS = 'thumbor_dash.app.ThumborDashServiceApp'

# Custom Image Loader
LOADER = 'thumbor_dash.loaders.http_loader'

Usage

1. Start thumbor_dash server

thumbor_dash --conf=thumbor.conf

2. Sign image URL

thumbor_dash-url --key="<SECURITY_KEY>" --width=<width> --height=<height> --dashauth="requester(<requesterId>):contract(<contractId>):document(<documentType>):field(<avatarUrl>):owner(<ownerId>):updatedAt(<updatedAt>)" --filters="<filters>" <imageURL>

output:

/<signature>/<width>x<height>/dashauth:requester(<requesterId>):contract(<contractId>):document(<documentType>):field(<field>):owner(<ownerId>):updatedAt(<updatedAt>)/filters:format(<format>)/<encodedImageUrl>

3. Thumbor_dash image retrieval URL

http://<thumbor_dash-server>/<signature>/<width>x<height>/dashauth:requester(<requesterId>):contract(<contractId>):document(<documentType>):field(<field>):owner(<ownerId>):updatedAt(<updatedAt>)/filters:format(<format>)/<encodedImageUrl>

Note: If running the server locally, <thumbor_dash-server> should be localhost:8888

Example

This is a signed thumbor_dash url. Simply run thumbor_dash and paste this link in your browser.

http://localhost:8888/MXd8uDwHf1xqp6YG0RzlkrmtdBaq1ZyzznPLJft1rl4=/1200x800/dashauth:requester(26AxVi5bvYYaC94GmeTmqX21vzsSxar2a4imxSE8ULUQ):contract(D6tjxCZzZobDQztc4S1PK7EDwm4CegLARpiKZn6jQc1R):document(thumbnailField):field(avatarUrl):owner(26AxVi5bvYYaC94GmeTmqX21vzsSxar2a4imxSE8ULUQ):updatedAt(1627948894242)/filters:format(jpeg)/https%3A//github.com/thumbor/thumbor/raw/master/example.jpg

Running thumbor_dash in Docker

This is the fastest way to run thumbor_dash

1. Create a thumbor.env.txt file containing the environment variables

MIN_WIDTH=1
MIN_HEIGHT=1
MAX_WIDTH=1200
MAX_HEIGHT=800
SECURITY_KEY=0
REQUEST_TIME_LIMIT=1 
USAGE_VIOLATION_LIMIT=5
BAN_DURATION=10
USE_CUSTOM_ERROR_HANDLING=True
ALLOW_UNSAFE_URL=False
URL_SIGNER=thumbor_dash.url_signers.base64_hmac_sha256
ERROR_HANDLER_MODULE=thumbor_dash.error_handlers.sentry
APP_CLASS=thumbor_dash.app.ThumborDashServiceApp
LOADER=thumbor_dash.loaders.http_loader

2. Start thumbor_dash server in Docker

docker run -p 80:80 --env-file thumbor.env.txt mayoreee/thumbor_dash

Note: If running in Docker, <thumbor_dash-server> in the image request URL should be set to localhost:80 instead of localhost:8888.