510 lines
17 KiB
Markdown
510 lines
17 KiB
Markdown
# Morss - Get full-text RSS feeds
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[Homepage](https://morss.it/) •
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[Upstream source code](https://git.pictuga.com/pictuga/morss) •
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[Github mirror](https://github.com/pictuga/morss) (for Issues & Pull requests)
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[](https://ci.pictuga.com/pictuga/morss)
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[](https://github.com/pictuga/morss/stargazers)
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[](https://github.com/pictuga/morss/network/members)
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[](https://git.pictuga.com/pictuga/morss/src/branch/master/LICENSE)
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[](https://creativecommons.org/licenses/by-nc-sa/4.0/)
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This tool's goal is to get full-text RSS feeds out of striped RSS feeds,
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commonly available on internet. Indeed most newspapers only make a small
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description available to users in their rss feeds, which makes the RSS feed
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rather useless. So this tool intends to fix that problem.
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This tool opens the links from the rss feed, then downloads the full article
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from the newspaper website and puts it back in the rss feed.
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Morss also provides additional features, such as: .csv and json export, extended
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control over output. A strength of morss is its ability to deal with broken
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feeds, and to replace tracking links with direct links to the actual content.
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Morss can also generate feeds from html and json files (see `feeds.py`), which
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for instance makes it possible to get feeds for Facebook or Twitter, using
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hand-written rules (ie. there's no automatic detection of links to build feeds).
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Please mind that feeds based on html files may stop working unexpectedly, due to
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html structure changes on the target website.
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Additionally morss can detect rss feeds in html pages' `<meta>`.
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You can use this program online for free at **[morss.it](https://morss.it/)**.
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Some features of morss:
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- Read RSS/Atom feeds
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- Create RSS feeds from json/html pages
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- Export feeds as RSS/JSON/CSV/HTML
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- Fetch full-text content of feed items
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- Follow 301/meta redirects
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- Recover xml feeds with corrupt encoding
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- Supports gzip-compressed http content
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- HTTP caching with different backends (in-memory/sqlite/mysql/redis/diskcache)
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- Works as server/cli tool
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- Deobfuscate various tracking links
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## Install
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### Python package
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].status&url=https://ci.pictuga.com/api/repos/pictuga/morss/builds/latest)
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[](https://pypi.org/project/morss/)
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[](https://pypistats.org/packages/morss)
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Simple install (without optional dependencies)
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From pip
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```shell
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pip install morss
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```
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From git
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```shell
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pip install git+https://git.pictuga.com/pictuga/morss.git
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```
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Full installation (including optional dependencies)
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From pip
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```shell
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pip install morss[full]
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```
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From git
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```shell
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pip install git+https://git.pictuga.com/pictuga/morss.git#egg=morss[full]
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```
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The full install includes all the cache backends. Otherwise, only in-memory and
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sqlite3 caches are available. The full install also includes gunicorn (for more
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efficient HTTP handling).
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The dependency `lxml` is fairly long to install (especially on Raspberry Pi, as
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C code needs to be compiled). If possible on your distribution, try installing
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it with the system package manager.
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### Docker
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].status&url=https://ci.pictuga.com/api/repos/pictuga/morss/builds/latest)
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[](https://hub.docker.com/r/pictuga/morss)
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[](https://hub.docker.com/r/pictuga/morss/tags)
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From docker hub
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With cli
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```shell
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docker pull pictuga/morss
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```
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With docker-compose
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```yml
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services:
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app:
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image: pictuga/morss
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ports:
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- '8000:8000'
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```
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Build from source
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With cli
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```shell
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docker build --tag morss https://git.pictuga.com/pictuga/morss.git --no-cache --pull
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```
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With docker-compose
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```yml
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services:
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app:
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build: https://git.pictuga.com/pictuga/morss.git
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image: morss
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ports:
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- '8000:8000'
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```
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Then execute
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```shell
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docker-compose build --no-cache --pull
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```
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### Cloud providers
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One-click deployment:
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[](https://heroku.com/deploy?template=https://github.com/pictuga/morss)
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[](https://deploy.cloud.run/?git_repo=https://github.com/pictuga/morss.git)
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Providers supporting `cloud-init` (AWS, Oracle Cloud Infrastructure), based on Ubuntu:
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``` yml
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#cloud-config
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packages:
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- python3-pip
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- python3-wheel
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- python3-lxml
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- python3-setproctitle
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- ca-certificates
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write_files:
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- path: /etc/environment
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content: |
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DEBUG=1
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CACHE=diskcache
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CACHE_SIZE=1073741824
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- path: /var/lib/cloud/scripts/per-boot/morss.sh
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permissions: 744
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content: |
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#!/bin/sh
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gunicorn --bind 0.0.0.0:${PORT:-8000} ${GUNICORN} --preload --access-logfile - --daemon morss
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runcmd:
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- update-ca-certificates
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- iptables -I INPUT 6 -m state --state NEW -p tcp --dport ${PORT:-8000} -j ACCEPT
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- netfilter-persistent save
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- pip install morss[full]
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```
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## Run
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morss will auto-detect what "mode" to use.
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### Running on/as a server
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Set up the server as indicated below, then visit:
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```
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http://PATH/TO/MORSS/[main.py/][:argwithoutvalue[:argwithvalue=value[...]]]/FEEDURL
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```
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For example: `http://morss.example/:clip/https://twitter.com/pictuga`
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*(Brackets indicate optional text)*
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The `main.py` part is only needed if your server doesn't support the Apache
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redirect rule set in the provided `.htaccess`.
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Works like a charm with [Tiny Tiny RSS](https://tt-rss.org/), and most probably
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other clients.
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#### Using Docker
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From docker hub
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```shell
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docker run -p 8000:8000 pictuga/morss
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```
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From source
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```shell
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docker run -p 8000:8000 morss
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```
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With docker-compose
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```shell
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docker-compose up
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```
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#### Using Gunicorn
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```shell
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gunicorn --preload morss
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```
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#### Using uWSGI
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Running this command should do:
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```shell
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uwsgi --http :8000 --plugin python --wsgi-file main.py
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```
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#### Using morss' internal HTTP server
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Morss can run its own, **very basic**, HTTP server, meant for debugging mostly.
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The latter should start when you run morss without any argument, on port 8000.
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I'd highly recommend you to use gunicorn or something similar for better
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performance.
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```shell
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morss
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```
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You can change the port using environment variables like this `PORT=9000 morss`.
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#### Via mod_cgi/FastCGI with Apache/nginx
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For this, you'll want to change a bit the architecture of the files, for example
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into something like this.
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```
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/
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├── cgi
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│ │
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│ ├── main.py
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│ ├── morss
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│ │ ├── __init__.py
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│ │ ├── __main__.py
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│ │ ├── morss.py
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│ │ └── ...
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│ │
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│ ├── dateutil
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│ └── ...
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│
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├── .htaccess
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├── index.html
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└── ...
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```
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For this, you need to make sure your host allows python script execution. This
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method uses HTTP calls to fetch the RSS feeds, which will be handled through
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`mod_cgi` for example on Apache severs.
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Please pay attention to `main.py` permissions for it to be executable. Also
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ensure that the provided `/www/.htaccess` works well with your server.
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### As a CLI application
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Run:
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```
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morss [--argwithoutvalue] [--argwithvalue=value] [...] FEEDURL
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```
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For example: `morss --clip http://feeds.bbci.co.uk/news/rss.xml`
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*(Brackets indicate optional text)*
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If using Docker:
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```shell
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docker run morss --clip http://feeds.bbci.co.uk/news/rss.xml
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```
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### As a newsreader hook
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To use it, the newsreader [Liferea](http://lzone.de/liferea/) is required
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(unless other newsreaders provide the same kind of feature), since custom
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scripts can be run on top of the RSS feed, using its
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[output](http://lzone.de/liferea/scraping.htm) as an RSS feed.
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To use this script, you have to enable "(Unix) command" in liferea feed
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settings, and use the command:
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```
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morss [--argwithoutvalue] [--argwithvalue=value] [...] FEEDURL
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```
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For example: `morss http://feeds.bbci.co.uk/news/rss.xml`
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*(Brackets indicate optional text)*
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### As a python library
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Quickly get a full-text feed:
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```python
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>>> import morss
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>>> xml_string = morss.process('http://feeds.bbci.co.uk/news/rss.xml')
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>>> xml_string[:50]
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"<?xml version='1.0' encoding='UTF-8'?>\n<?xml-style"
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```
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Using cache and passing arguments:
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```python
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>>> import morss
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>>> url = 'http://feeds.bbci.co.uk/news/rss.xml'
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>>> cache = '/tmp/morss-cache.db' # sqlite cache location
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>>> options = {'csv':True}
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>>> xml_string = morss.process(url, cache, options)
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>>> xml_string[:50]
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'{"title": "BBC News - Home", "desc": "The latest s'
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```
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`morss.process` is actually a wrapper around simpler function. It's still
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possible to call the simpler functions, to have more control on what's happening
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under the hood.
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Doing it step-by-step:
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```python
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import morss, morss.crawler
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url = 'http://newspaper.example/feed.xml'
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options = morss.Options(csv=True) # arguments
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morss.crawler.sqlite_default = '/tmp/morss-cache.db' # sqlite cache location
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url, rss = morss.FeedFetch(url, options) # this only grabs the RSS feed
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rss = morss.FeedGather(rss, url, options) # this fills the feed and cleans it up
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output = morss.FeedFormat(rss, options, 'unicode') # formats final feed
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```
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## Arguments and settings
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### Arguments
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morss accepts some arguments, to lightly alter the output of morss. Arguments
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may need to have a value (usually a string or a number). How to pass those
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arguments to morss is explained in Run above.
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The list of arguments can be obtained by running `morss --help`
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```
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usage: morss [-h] [--post STRING] [--xpath XPATH]
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[--format {rss,json,html,csv}] [--search STRING] [--clip]
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[--indent] [--cache] [--force] [--proxy] [--newest] [--firstlink]
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[--resolve] [--items XPATH] [--item_link XPATH]
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[--item_title XPATH] [--item_content XPATH] [--item_time XPATH]
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[--nolink] [--noref] [--silent]
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url
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Get full-text RSS feeds
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positional arguments:
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url feed url
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optional arguments:
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-h, --help show this help message and exit
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--post STRING POST request
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--xpath XPATH xpath rule to manually detect the article
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output:
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--format {rss,json,html,csv}
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output format
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--search STRING does a basic case-sensitive search in the feed
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--clip stick the full article content under the original feed
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content (useful for twitter)
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--indent returns indented XML or JSON, takes more place, but
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human-readable
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action:
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--cache only take articles from the cache (ie. don't grab new
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articles' content), so as to save time
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--force force refetch the rss feed and articles
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--proxy doesn't fill the articles
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--newest return the feed items in chronological order (morss
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ohterwise shows the items by appearing order)
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--firstlink pull the first article mentioned in the description
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instead of the default link
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--resolve replace tracking links with direct links to articles
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(not compatible with --proxy)
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custom feeds:
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--items XPATH (mandatory to activate the custom feeds function)
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xpath rule to match all the RSS entries
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--item_link XPATH xpath rule relative to items to point to the entry's
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link
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--item_title XPATH entry's title
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--item_content XPATH entry's content
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--item_time XPATH entry's date & time (accepts a wide range of time
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formats)
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misc:
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--nolink drop links, but keeps links' inner text
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--noref drop items' link
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--silent don't output the final RSS (useless on its own, but
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can be nice when debugging)
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GNU AGPLv3 code
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```
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Further HTTP-only options:
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- `callback=NAME`: for JSONP calls
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- `cors`: allow Cross-origin resource sharing (allows XHR calls from other
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servers)
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- `txt`: changes the http content-type to txt (for faster "`view-source:`")
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### Environment variables
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To pass environment variables:
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- Docker-cli: `docker run -p 8000:8000 morss --env KEY=value`
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- docker-compose: add an `environment:` section in the .yml file
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- Gunicorn/uWSGI/CLI: prepend `KEY=value` before the command
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- Apache: via the `SetEnv` instruction (see sample `.htaccess` provided)
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Generic:
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- `DEBUG=1`: to have some feedback from the script execution. Useful for
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debugging.
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- `IGNORE_SSL=1`: to ignore SSL certs when fetch feeds and articles
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- `DELAY` (seconds) sets the browser cache delay, only for HTTP clients
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- `TIMEOUT` (seconds) sets the HTTP timeout when fetching rss feeds and articles
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When parsing long feeds, with a lot of items (100+), morss might take a lot of
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time to parse it, or might even run into a memory overflow on some shared
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hosting plans (limits around 10Mb), in which case you might want to adjust the
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below settings via environment variables.
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Also, if the request takes too long to process, the http request might be
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discarded. See relevant config for
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[gunicorn](https://docs.gunicorn.org/en/stable/settings.html#timeout) or
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[nginx](http://nginx.org/en/docs/http/ngx_http_proxy_module.html#proxy_read_timeout).
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- `MAX_TIME` (seconds) sets the maximum amount of time spent *fetching*
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articles, more time might be spent taking older articles from cache. `-1` for
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unlimited.
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- `MAX_ITEM` sets the maximum number of articles to fetch. `-1` for unlimited.
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More articles will be taken from cache following the nexts settings.
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- `LIM_TIME` (seconds) sets the maximum amount of time spent working on the feed
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(whether or not it's already cached). Articles beyond that limit will be dropped
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from the feed. `-1` for unlimited.
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- `LIM_ITEM` sets the maximum number of article checked, limiting both the
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number of articles fetched and taken from cache. Articles beyond that limit will
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be dropped from the feed, even if they're cached. `-1` for unlimited.
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morss uses caching to make loading faster. There are 3 possible cache backends:
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- `(nothing/default)`: a simple python in-memory dict-like object.
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- `CACHE=sqlite`: sqlite3 cache. Default file location is in-memory (i.e. it
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will be cleared every time the program is run). Path can be defined with
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`SQLITE_PATH`.
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- `CACHE=mysql`: MySQL cache. Connection can be defined with the following
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environment variables: `MYSQL_USER`, `MYSQL_PWD`, `MYSQL_DB`, `MYSQL_HOST`
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- `CACHE=redis`: Redis cache. Connection can be defined with the following
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environment variables: `REDIS_HOST`, `REDIS_PORT`, `REDIS_DB`, `REDIS_PWD`
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- `CACHE=diskcache`: disk-based cache. Target directory canbe defined with
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`DISKCACHE_DIR`.
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To limit the size of the cache:
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- `CACHE_SIZE` sets the target number of items in the cache (further items will
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be deleted but the cache might be temporarily bigger than that). Defaults to 1k
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entries. NB. When using `diskcache`, this is the cache max size in Bytes.
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- `CACHE_LIFESPAN` (seconds) sets how often the cache must be trimmed (i.e. cut
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down to the number of items set in `CACHE_SIZE`). Defaults to 1min.
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### Content matching
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The content of articles is grabbed with our own readability fork. This means
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that most of the time the right content is matched. However sometimes it fails,
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therefore some tweaking is required. Most of the time, what has to be done is to
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add some "rules" in the main script file in `readabilite.py` (not in morss).
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Most of the time when hardly nothing is matched, it means that the main content
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of the article is made of images, videos, pictures, etc., which readability
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doesn't detect. Also, readability has some trouble to match content of very
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small articles.
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morss will also try to figure out whether the full content is already in place
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(for those websites which understood the whole point of RSS feeds). However this
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detection is very simple, and only works if the actual content is put in the
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"content" section in the feed and not in the "summary" section.
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