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Johann Dreo 2020-02-21 14:34:40 +01:00
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@ -54,6 +54,9 @@ The second one reads the result:
cat out
```
Note that you can use the same pipe for input and output: `./service data data`.
### Service with two dependent inputs
The second example `./service2 context data out` shows a service
@ -74,7 +77,12 @@ If you want to expose such a service as a network server, just use socat.
For example, to get _data_ query from the network for `service2`:
```sh
socat -v -u TCP4-LISTEN:8423,reuseaddr PIPE:./data
socat -v -u TCP-LISTEN:8423,reuseaddr PIPE:./data
```
You can test it by sending something on the connection:
```sh
echo "data" > /dev/tcp/127.0.0.1/8423
```
Conversely, to send automatically back the answer to some server:
@ -82,9 +90,17 @@ Conversely, to send automatically back the answer to some server:
socat -v -u PIPE:./out TCP2:8424:host
```
Be aware that `socat` will terminate as soon as it receives the end of the message.
Thus, if you want to establish a permanent gate, you will have to automatically restart it:
```sh
while true; do socat TCP-LISTEN:8478,reuseaddr PIPE:/./data || break; done
```
Author & license
----------------
Author: nojhan@nojhan.net
License: AGPLv3