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transfer/docs/configuration.md
2020-05-12 17:14:16 +07:00

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# Configuration
First of all, I'll give an overview about the configuration options. See the
[config.js](https://github.com/psi-4ward/psitransfer/blob/master/config.js#L5) for
possible values. I do **not** recommend changing this file directly, better use one
of the following options.
## Config file: NODE_ENV related
PsiTransfer searches for an config file with the name `config.<NODE_ENV>.js` in the
root folder where `<NODE_ENV>` stands for the value of the environment parameter `NODE_ENV`.
If you start PsiTransfer using `npm start` it's `production` so you can create a
`config.production.js` with your settings. For example take a look at
[config.dev.js](https://github.com/psi-4ward/psitransfer/blob/master/config.dev.js).
This file is used when starting the application with `npm run dev`.
You are completely free to introduce own configs like `config.custom.js` and start
the app with `NODE_ENV=custom node app.js`.
## Environment variables
Some Linux distributions have `/etc/default/<daemon>` or `/etc/sysconfig/<daemon>`
files with environment configurations. Moreover, it's common to
configure the behaviour of Docker containers using environment parameters.
PsiTransfer supports overwriting every config value by environment parameters prefixed
with `PSITRANSFER_`.
```bash
export NODE_ENV=dev
export PSITRANSFER_RETENTIONS='{"one-time":"one time","3600":"1 Hour"}'
export PSITRANSFER_PORT=8080
node app.js
```
* The above example sets the `NODE_ENV` to `dev`.
If `config.dev.js` exists, it is loaded and overwrites the corresponding values from `config.js`.
* Then it will overwrite `retentions` and `port` with the values of the environment parameters.
> Environment parameters always have the highest priority.
## SSL
It's recommended to use Nginx for SSL termination, see [nginx-ssl-example.conf](https://github.com/psi-4ward/psitransfer/blob/master/docs/nginx-ssl-example.conf).
For native SSL support provide `sslPort`, `sslKeyFile`, `sslCertFile` options. To generate
a _snake oil_ certificate use `openssl req -x509 -nodes -days 365 -newkey rsa:2048 -keyout cert.key -out cert.pem`.
To disable HTTP set the `port` config value to `false`.
## WebHooks
For the sake of integrating PsiTransfer with other systems, PsiTransfer can notify a webhook with a POST request on the following events:
### fileUploaded
On completion of a file upload, if `fileUploadedWebhook` is set in `config.<NODE_ENV>.js`, PsiTransfer will make a POST request to that url.
At the time of writing, the POST body will contain a data structure resembling this (serialized as json):
```json
{
"metadata": {
"sid": "6055ab792b6c",
"retention": 3600,
"password": "file password is in plaintext here",
"name": "test.png",
"comment": "User individual file comment goes here",
"type": "image/png",
"key": "135a3814-df46-4e23-b061-03bdda13425c",
"createdAt": 1589276618052
},
"date": 1589276619385
}
```
* Note: this event will fire many times if a user uploads multiple files in a single session (`sid`), as each individual file is uploaded separately. You'll notice that the `sid` will remain the same, but the `key` will change for each file.
* For file sync purposes (e.g. syncing client uploads to another service or long-term storage), you can reassemble a file fetch url with `https://<PSITRANSFER_HOST>/${sid}++${key}`
### fileDownloaded
When a user attempts to download a file, if `fileDownloadedWebhook` is set in `config.<NODE_ENV>.js`, PsiTransfer will make a POST request to that url.
At the time of writing, the POST body will contain a data structure resembling this (serialized as json):
```json
{
"sid": "6055ab792b6c",
"name": "test.png",
"date": 1589276619415
}
```