Update README.

Li Ian-Xue (b4283)Thu Sep 30 19:56:25+0300 2021

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Update README.

README.md

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# guile-pastebin
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A very simple pastebin written in Guile Scheme.
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## How to run
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It was tested on Guile 2.2.7 and 3.0.7.  Many thanks to the Guile
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development team for such great software.
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## API
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- `/post` -- create paste
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  - method: POST only
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  - type: `multipart/form-data`
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  - fields
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    - `text` -- the paste content
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    - `showUrl=1` -- to show the raw URL after paste
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- `/raw/<ID>` -- get paste content
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  - method: GET only
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- Anything else -- show top 5 paste list
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## Paste a file from command line
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Paste a text file from command line and get a URL back:
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`curl -F "text=<helloworld.cs" -F showUrl=1 http://localhost:8080/post`
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Notice the double-quotes around the parameters because `<` means IO
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redirection in sh.
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## Reverse Proxy
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It may be desirable to setup a reverse proxy on Apache Httpd (also a memo
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for myself), so you don't have to expose the 8080 or whatever port:
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```
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    <Location "/pastebin">
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        ProxyPass "http://your_address:8080"
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        ProxyPassReverse "http://your_address:8080"
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        ProxyHTMLEnable On
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        ProxyHTMLDocType "<!DOCTYPE html>"
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        ProxyHTMLURLMap "/" "/pastebin/"
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    </Location>
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<Location "/pastebin">
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    ProxyPass "http://your_address:8080"
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    ProxyPassReverse "http://your_address:8080"
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    ProxyHTMLEnable On
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    ProxyHTMLDocType "<!DOCTYPE html>"
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    ProxyHTMLURLMap "/" "/pastebin/"
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</Location>
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```
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