no80 - The resource effective redirecting http server
No80 is a minimal dockerized http server that only makes redirects temporarily (302) or permanently (301) to given URLs. Often used to redirect http service users to a https service. A way more simple way to do http redirects than, for example, nginx. The docker image size is under one megabyte.
Docker repository is available at https://hub.docker.com/r/malafoss/no80.
To run the latest container:
<docker|podman> run <DOCKER_OPTIONS> -p <PORT>:80 docker.io/malafoss/no80 <OPTIONS> <URL>
Options:
-a Append path from the http request to the redirected URL
-h Print this help text and exit
-m PATH URL Redirect path matching with PATH to URL
-s PATH URL Redirect path starting with PATH to URL
-r PATH URL Redirect path starting with PATH to URL appended with the rest of the path
-p N Use specified port number N (default is port 80)
-P Redirect permanently using 301 instead of temporarily using 302
-q Suppress statistics
With -P option, no80 will make permanent http redirects using 301 and without -P option using 302.
Example 1:
podman run -t -i --rm -p 8080:80 docker.io/malafoss/no80 https://example.com
Runs no80 http server which will redirect all port 8080 requests to https://example.com.
Example 2:
podman run -t -i --rm -p 8080:80 docker.io/malafoss/no80 -a https://example.com
Runs no80 http server which will redirect port 8080 requests having request path /path to https://example.com/path.
Example 3:
docker run --userns host --network host -t -i --rm docker.io/malafoss/no80 -a https://`hostname -f`
or
docker run -t -i --rm -p 80:80 docker.io/malafoss/no80 -a https://`hostname -f`
Redirect browsers accessing http port 80 to https port 443 on the current host.
Example 4:
podman run -t -i --rm -p 8080:80 docker.io/malafoss/no80 -m /match https://siteA/pathA https://siteB/pathB
Redirect browsers accessing http port 8080 to https://siteA/pathA if request path matches with /match. Otherwise browsers are redirected to https://siteB/pathB.
Example 5:
podman run -t -i --rm -p 8080:80 docker.io/malafoss/no80 -m /match https://siteA/pathA -s /starting https://siteB/pathB -r /redirect https://siteC/pathC https://siteD/pathD
Redirect exact path /match to https://siteA/pathA. Redirect paths starting with /starting such as /starting/mypath to https://siteB/pathB. Redirect paths starting with /redirect such as /redirect/mypath to https://siteC/pathC/mypath. Otherwise redirect by default to https://siteD/pathD.
Note that multiple -m, -s and -r options are allowed and are processed in the given order.
To build: ./build.sh
To run tests: ./test.sh
Running using docker (or similarly podman):
docker run -t -i --rm -p 8080:80 no80 https://example.com
Running using systemd:
/etc/systemd/system/no80.service
[Unit]
Description=no80 http service
After=docker.service
Requires=docker.service
[Service]
TimeoutStartSec=0
Restart=always
RestartSec=3
ExecStartPre=-/usr/bin/docker stop no80
ExecStartPre=-/usr/bin/docker rm no80
ExecStartPre=/usr/bin/docker pull docker.io/malafoss/no80
ExecStart=/usr/bin/docker run --rm --name no80 -p 80:80 docker.io/malafoss/no80 https://example.com
ExecStop=/usr/bin/docker stop no80
[Install]
WantedBy=multi-user.target
Copyright (c) 2022 Mikko Ala-Fossi
Licensed under MIT license
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