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Overhaul README.md with more helpful and more up-to-date instructions
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README.md
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README.md
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# NyaaV2
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## Setup
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## Setting up for development
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This project uses Python 3.6. There are features used that do not exist in 3.5, so make sure to use Python 3.6.
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This guide also assumes you 1) are using Linux and 2) are somewhat capable with the commandline.
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It's not impossible to run Nyaa on Windows, but this guide doesn't focus on that.
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### Code Quality:
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- Before we get any deeper, remember to follow PEP8 style guidelines and run `./lint.sh` before committing.
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- You may also use `pycodestyle nyaa/ --show-source --max-line-length=100´ to see a list of warnings/problems instead of having `lint.sh` making modifications for you
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- Other than PEP8, try to keep your code clean and easy to understand, as well. It's only polite!
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### Setting up Pyenv
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pyenv eases the use of different Python versions, and as not all Linux distros offer 3.6 packages, it's right up our alley.
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- Install dependencies https://github.com/pyenv/pyenv/wiki/Common-build-problems
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- Install `pyenv` https://github.com/pyenv/pyenv/blob/master/README.md#installation
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- Install `pyenv-virtualenv` https://github.com/pyenv/pyenv-virtualenv/blob/master/README.md
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- `pyenv install 3.6.1`
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- `pyenv virtualenv 3.6.1 nyaa`
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- `pyenv activate nyaa`
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- Install Python 3.6.1 with `pyenv` and create a virtualenv for the project:
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- `pyenv install 3.6.1`
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- `pyenv virtualenv 3.6.1 nyaa`
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- `pyenv activate nyaa`
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- Install dependencies with `pip install -r requirements.txt`
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- Copy `config.example.py` into `config.py`
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- Change TABLE_PREFIX to `nyaa_` or `sukebei_` depending on the site
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- Change `SITE_FLAVOR` in your `config.py` depending on which instance you want to host
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### Setting up MySQL/MariaDB database for advanced functionality
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### Setting up MySQL/MariaDB database
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You *may* use SQLite but the current support for it in this project is outdated and rather unsupported.
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- Enable `USE_MYSQL` flag in config.py
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- Install latest mariadb by following instructions here https://downloads.mariadb.org/mariadb/repositories/
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- Tested versions: `mysql Ver 15.1 Distrib 10.0.30-MariaDB, for debian-linux-gnu (x86_64) using readline 5.2`
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- Run the following commands logged in as your root db user:
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- Run the following commands logged in as your root db user (substitute for your own `config.py` values if desired):
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- `CREATE USER 'test'@'localhost' IDENTIFIED BY 'test123';`
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- `GRANT ALL PRIVILEGES ON * . * TO 'test'@'localhost';`
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- `GRANT ALL PRIVILEGES ON *.* TO 'test'@'localhost';`
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- `FLUSH PRIVILEGES;`
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- `CREATE DATABASE nyaav2 DEFAULT CHARACTER SET utf8 COLLATE utf8_bin;`
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- To setup and import nyaa_maria_vx.sql:
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- `mysql -u <user> -p nyaav2`
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- `DROP DATABASE nyaav2;`
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- `CREATE DATABASE nyaav2 DEFAULT CHARACTER SET utf8 COLLATE utf8_bin;`
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- `SOURCE ~/path/to/database/nyaa_maria_vx.sql`
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### Finishing up
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- Run `python db_create.py` to create the database
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- Load the .sql file
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- `mysql -u user -p nyaav2`
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- `SOURCE cocks.sql`
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- Remember to change the default user password to an empty string to disable logging in
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- Run `python db_create.py` to create the database and import categories
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- Follow the advice of `db_create.py` and run `./db_migrate.py stamp head` to mark the database version for Alembic
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- Start the dev server with `python run.py`
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- When you are finished developing, deactivate your virtualenv with `source deactivate`
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- When you are finished developing, deactivate your virtualenv with `pyenv deactivate` or `source deactivate` (or just close your shell session)
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## Enabling ElasticSearch
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You're now ready for simple testing and development!
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Continue below to learn about database migrations and enabling the advanced search engine, Elasticsearch.
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### Basics
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- Install jdk `sudo apt-get install openjdk-8-jdk`
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- Install elasticsearch https://www.elastic.co/guide/en/elasticsearch/reference/current/deb.html
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- `sudo systemctl enable elasticsearch.service`
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- `sudo systemctl start elasticsearch.service`
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- Run `curl -XGET 'localhost:9200'` and make sure ES is running
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- Optional: install Kabana as a search frontend for ES
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### Enable MySQL Binlogging
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- Add the `[mariadb]` bin-log section to my.cnf and reload mysql server
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- Connect to mysql
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- `SHOW VARIABLES LIKE 'binlog_format';`
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- Make sure it shows ROW
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- Connect to root user
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- `GRANT REPLICATION SLAVE ON *.* TO 'test'@'localhost';` where test is the user you will be running `sync_es.py` with
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### Setting up ES
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- Run `./create_es.sh` and this creates two indicies: `nyaa` and `sukebei`
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- The output should show `acknowledged: true` twice
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- The safest bet is to disable the webapp here to ensure there's no database writes
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- Run `python import_to_es.py` with `SITE_FLAVOR` set to `nyaa`
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- Run `python import_to_es.py` with `SITE_FLAVOR` set to `sukebei`
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- These will take some time to run as it's indexing
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### Setting up sync_es.py
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- Sync_es.py keeps the ElasticSearch index updated by reading the BinLog
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- Configure the MySQL options with the user where you granted the REPLICATION permissions
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- Connect to MySQL, run `SHOW MASTER STATUS;`.
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- Copy the output to `/var/lib/sync_es_position.json` with the contents `{"log_file": "FILE", "log_pos": POSITION}` and replace FILENAME with File (something like master1-bin.000002) in the SQL output and POSITION (something like 892528513) with Position
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- Set up `sync_es.py` as a service and run it, preferably as the system/root
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- Make sure `sync_es.py` runs within venv with the right dependencies
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Enable the `USE_ELASTIC_SEARCH` flag in `config.py`, restart the application, and you're good to go.
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## Database migrations
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- Uses [flask-Migrate](https://flask-migrate.readthedocs.io/)
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- Run `./db_migrate.py db migrate` to generate the migration script after database model changes.
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- Take a look at the result in `migrations/versions/...` to make sure nothing went wrong.
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- Run `./db_migrate.py db upgrade` to upgrade your database.
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- Database migrations are done with [flask-Migrate](https://flask-migrate.readthedocs.io/), a wrapper around [Alembic](http://alembic.zzzcomputing.com/en/latest/).
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- If someone has made changes in the database schema and included a new migration script:
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- If your database has never been marked by Alembic (you're on a database from before the migrations), run `./db_migrate.py stamp head` before pulling the new migration script(s).
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- If you already have the new scripts, check the output of `./db_migrate.py history` instead and choose a hash that matches your current database state, then run `./db_migrate.py stamp <hash>`.
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- Update your branch (eg. `git fetch && git rebase origin/master`)
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- Run `./db_migrate.py upgrade head` to run the migration. Done!
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- If *you* have made a change in the database schema:
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- Save your changes in `models.py` and ensure the database schema matches the previous version (ie. your new tables/columns are not added to the live database)
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- Run `./db_migrate.py migrate -m "Short description of changes"` to automatically generate a migration script for the changes
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- Check the script (`migrations/versions/...`) and make sure it works! Alembic may not able to notice all changes.
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- Run `./db_migrate.py upgrade` to run the migration and verify the upgrade works.
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- (Run `./db_migrate.py downgrade` to verify the downgrade works as well, then upgrade again)
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## Code Quality:
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- Remember to follow PEP8 style guidelines and run `./lint.sh` before committing.
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## Setting up and enabling Elasticsearch
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### Installing Elasticsearch
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- Install JDK with `sudo apt-get install openjdk-8-jdk`
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- Install [Elasticsearch](https://www.elastic.co/downloads/elasticsearch)
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- [From packages...](https://www.elastic.co/guide/en/elasticsearch/reference/current/deb.html)
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- Enable the service:
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- `sudo systemctl enable elasticsearch.service`
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- `sudo systemctl start elasticsearch.service`
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- or [simply extracting the archives and running the files](https://www.elastic.co/guide/en/elasticsearch/reference/current/_installation.html), if you don't feel like permantently installing ES
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- Run `curl -XGET 'localhost:9200'` and make sure ES is running
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- Optional: install [Kibana](https://www.elastic.co/products/kibana) as a search debug frontend for ES
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### Setting up ES
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- Run `./create_es.sh` to create the indices for the torrents: `nyaa` and `sukebei`
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- The output should show `acknowledged: true` twice
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- Stop the Nyaa app if you haven't already
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- Run `python import_to_es.py` to import all the torrents (on nyaa and sukebei) into the ES indices.
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- This may take some time to run if you have plenty of torrents in your database.
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Enable the `USE_ELASTIC_SEARCH` flag in `config.py` and (re)start the application.
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Elasticsearch should now be functional! The ES indices won't be updated "live" with the current setup, continue below for instructions on how to hook Elasticsearch up to MySQL binlog.
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However, take note that binglog is not necessary for simple ES testing and development; you can simply run `import_to_es.py` from time to time to reindex all the torrents.
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### Enabling MySQL Binlogging
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- Edit your MariaDB/MySQL server configuration and add the following under `[mariadb]`:
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```
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log-bin
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server_id=1
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log-basename=master1
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binlog-format=row
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```
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- Restart MariaDB/MySQL (`sudo service mysql restart`)
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- Copy the example configuration (`es_sync_config.example.json`) as `es_sync_config.json` and adjust options in it to your liking (verify the connection options!)
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- Connect to mysql as root
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- Verify that the result of `SHOW VARIABLES LIKE 'binlog_format';` is `ROW`
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- Execute `GRANT REPLICATION SLAVE ON *.* TO 'username'@'localhost';` to allow your configured user access to the binlog
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### Setting up sync_es.py
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`sync_es.py` keeps the Elasticsearch indices updated by reading the binlog and pushing the changes to the ES indices.
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- Make sure `es_sync_config.json` is configured with the user you grated the `REPLICATION` permissions
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- Run `import_to_es.py` and copy the outputted JSON into the file specified by `save_loc` in your `es_sync_config.json`
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- Run `sync_es.py` as-is *or*, for actual deployment, set it up as a service and run it, preferably as the system/root
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- Make sure `sync_es.py` runs within the venv with the right dependencies!
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You're done! The script should now be feeding updates from the database to Elasticsearch.
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Take note, however, that the specified ES index refresh interval is 30 seconds, which may feel like a long time on local development. Feel free to adjust it or [poke Elasticsearch yourself!](https://www.elastic.co/guide/en/elasticsearch/reference/current/indices-refresh.html)
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