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

# 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'

# User-defined MN and IP list
SEED_IP = 'seed-1.testnet.networks.dash.org'
MN_LIST =  '34.219.81.129,34.221.42.205,34.208.88.128,54.189.162.193,34.220.124.90,54.201.242.241,54.68.10.46,34.210.81.39,18.237.47.243'

Usage

1. Start thumbor_dash server

thumbor_dash --conf=thumbor.conf

2. Sign image URL

thumbor_dash-url --key="<Requester Identity 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/U6lnOyBbSbRmZoxIgj81unAoR-V2GhJj1lAAQ0846Nw=/1200x800/dashauth:requester(856aSH6uEBaHpndZYXDk72NJbZqXokNSPGrs8nKbd7QL):contract(DbBHu3Ct1zD1AYAiw58V7QXT22B3k7qRLDLfaXqiRQp5):document(thumbnailField):field(avatarUrl):owner(856aSH6uEBaHpndZYXDk72NJbZqXokNSPGrs8nKbd7QL):updatedAt(1654864287788)/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
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
SEED_IP=seed-1.testnet.networks.dash.org
MN_LIST=34.219.81.129,34.221.42.205,34.208.88.128,54.189.162.193,34.220.124.90,54.201.242.241,54.68.10.46,34.210.81.39,18.237.47.243

2. Start thumbor_dash server in Docker

docker run -p 80:80 --env-file thumbor.env.txt mayoreee/thumbor_dash When your environment is not ARM-based, add the option --platform linux/arm64/v8

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