Initial Commit

Dockerfile

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+FROM nginx:alpine
+
+EXPOSE 80
+
+ENV PROXY_PASS_HOST=http://example.com
+
+COPY default.template /etc/nginx/conf.d/default.template
+
+COPY script.sh /usr/share/nginx/script.sh
+
+CMD envsubst '$PROXY_PASS_HOST' < etc/nginx/conf.d/default.template > /etc/nginx/conf.d/default.conf && \
+    nginx -g 'daemon off;'

LICENSE

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+Copyright (c) 2018 Joakim Hulthe
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

README.md

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+curl\_sh
+========
+_A User-Agent based proxy_
+
+This nginx configuration will return `script.sh` if the user-agent matches "**curl**".
+In any other case it will act as a reverse-proxy to `PROXY_PASS_HOST`.
+
+### Usage
+
+```sh
+$ docker build . -t curl_sh
+$ docker run -e PROXY_PASS_HOST=http://my_host:1234 --rm curl_sh
+```

default.template

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+server {
+	listen       80;
+	server_name  _;
+
+	#charset koi8-r;
+	#access_log  /var/log/nginx/host.access.log  main;
+
+	location / {
+		error_page 418 = @pass;
+		recursive_error_pages on;
+		if ( $http_user_agent !~ 'curl' ) {
+			return 418;
+		}
+
+		root /usr/share/nginx;
+		try_files /script.sh =404;
+	}
+
+	location @pass {
+		proxy_pass $PROXY_PASS_HOST;
+		proxy_set_header Host $host;
+		proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
+		proxy_redirect default;
+	}
+}
+

script.sh

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+#!/bin/sh
+
+echo "Hello there c:<"