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# Pict-rs {#module-services-pict-rs}
pict-rs is a a simple image hosting service.
## Quickstart {#module-services-pict-rs-quickstart}
the minimum to start pict-rs is
```nix
services.pict-rs.enable = true;
```
this will start the http server on port 8080 by default.
## Usage {#module-services-pict-rs-usage}
pict-rs offers the following endpoints:
- `POST /image` for uploading an image. Uploaded content must be valid multipart/form-data with an
image array located within the `images[]` key
This endpoint returns the following JSON structure on success with a 201 Created status
```json
{
"files": [
{
"delete_token": "JFvFhqJA98",
"file": "lkWZDRvugm.jpg"
},
{
"delete_token": "kAYy9nk2WK",
"file": "8qFS0QooAn.jpg"
},
{
"delete_token": "OxRpM3sf0Y",
"file": "1hJaYfGE01.jpg"
}
],
"msg": "ok"
}
```
- `GET /image/download?url=...` Download an image from a remote server, returning the same JSON
payload as the `POST` endpoint
- `GET /image/original/{file}` for getting a full-resolution image. `file` here is the `file` key from the
`/image` endpoint's JSON
- `GET /image/details/original/{file}` for getting the details of a full-resolution image.
The returned JSON is structured like so:
```json
{
"width": 800,
"height": 537,
"content_type": "image/webp",
"created_at": [
2020,
345,
67376,
394363487
]
}
```
- `GET /image/process.{ext}?src={file}&...` get a file with transformations applied.
existing transformations include
- `identity=true`: apply no changes
- `blur={float}`: apply a gaussian blur to the file
- `thumbnail={int}`: produce a thumbnail of the image fitting inside an `{int}` by `{int}`
square using raw pixel sampling
- `resize={int}`: produce a thumbnail of the image fitting inside an `{int}` by `{int}` square
using a Lanczos2 filter. This is slower than sampling but looks a bit better in some cases
- `crop={int-w}x{int-h}`: produce a cropped version of the image with an `{int-w}` by `{int-h}`
aspect ratio. The resulting crop will be centered on the image. Either the width or height
of the image will remain full-size, depending on the image's aspect ratio and the requested
aspect ratio. For example, a 1600x900 image cropped with a 1x1 aspect ratio will become 900x900. A
1600x1100 image cropped with a 16x9 aspect ratio will become 1600x900.
Supported `ext` file extensions include `png`, `jpg`, and `webp`
An example of usage could be
```
GET /image/process.jpg?src=asdf.png&thumbnail=256&blur=3.0
```
which would create a 256x256px JPEG thumbnail and blur it
- `GET /image/details/process.{ext}?src={file}&...` for getting the details of a processed image.
The returned JSON is the same format as listed for the full-resolution details endpoint.
- `DELETE /image/delete/{delete_token}/{file}` or `GET /image/delete/{delete_token}/{file}` to
delete a file, where `delete_token` and `file` are from the `/image` endpoint's JSON
## Missing {#module-services-pict-rs-missing}
- Configuring the secure-api-key is not included yet. The envisioned basic use case is consumption on localhost by other services without exposing the service to the internet.
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