LemmyNet/pict-rs

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asonix 50d118a2a7 Implement image pre-processing on upload

2022-09-25 15:17:33 -05:00

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pict-rs

a simple image hosting service

Usage

Running

pict-rs 0.4.0-alpha.7
asonix <asonix@asonix.dog>
A simple image hosting service

USAGE:
    pict-rs [OPTIONS] <SUBCOMMAND>

OPTIONS:
    -c, --config-file <CONFIG_FILE>
            Path to the pict-rs configuration file

        --console-address <CONSOLE_ADDRESS>
            Address and port to expose tokio-console metrics

        --console-buffer-capacity <CONSOLE_BUFFER_CAPACITY>
            Capacity of the console-subscriber Event Buffer

    -h, --help
            Print help information

        --log-format <LOG_FORMAT>
            Format of logs printed to stdout

        --log-targets <LOG_TARGETS>
            Log levels to print to stdout, respects RUST_LOG formatting

        --old-db-path <OLD_DB_PATH>
            Path to the old pict-rs sled database

        --opentelemetry-service-name <OPENTELEMETRY_SERVICE_NAME>
            Service Name to use for OpenTelemetry

        --opentelemetry-targets <OPENTELEMETRY_TARGETS>
            Log levels to use for OpenTelemetry, respects RUST_LOG formatting

        --opentelemetry-url <OPENTELEMETRY_URL>
            URL to send OpenTelemetry metrics

        --save-to <SAVE_TO>
            File to save the current configuration for reproducible runs

    -V, --version
            Print version information

SUBCOMMANDS:
    filesystem        Migrate from the provided filesystem storage
    help              Print this message or the help of the given subcommand(s)
    object-storage    Migrate from the provided object storage
    run               Runs the pict-rs web server

pict-rs-run 
Runs the pict-rs web server

USAGE:
    pict-rs run [OPTIONS] [SUBCOMMAND]

OPTIONS:
    -a, --address <ADDRESS>
            The address and port to bind the pict-rs web server

        --api-key <API_KEY>
            The API KEY required to access restricted routes

    -h, --help
            Print help information

        --media-cache-duration <MEDIA_CACHE_DURATION>
            How long, in hours, to keep media ingested through the "cached" endpoint

        --media-enable-silent-video <MEDIA_ENABLE_SILENT_VIDEO>
            Whether to enable GIF and silent MP4 uploads. Full videos are unsupported

        --media-filters <MEDIA_FILTERS>
            Which media filters should be enabled on the `process` endpoint

        --media-format <MEDIA_FORMAT>
            Enforce uploaded media is transcoded to the provided format

        --media-max-area <MEDIA_MAX_AREA>
            The maximum area, in pixels, for uploaded media

        --media-max-file-size <MEDIA_MAX_FILE_SIZE>
            The maximum size, in megabytes, for uploaded media

        --media-max-height <MEDIA_MAX_HEIGHT>
            The maximum height, in pixels, for uploaded media

        --media-max-width <MEDIA_MAX_WIDTH>
            The maximum width, in pixels, for uploaded media

        --media-preprocess-steps <MEDIA_PREPROCESS_STEPS>
            Optional pre-processing steps for uploaded media

        --media-skip-validate-imports <MEDIA_SKIP_VALIDATE_IMPORTS>
            Whether to validate media on the "import" endpoint

        --worker-id <WORKER_ID>
            ID of this pict-rs node. Doesn't do much yet

SUBCOMMANDS:
    filesystem        Run pict-rs with filesystem storage
    help              Print this message or the help of the given subcommand(s)
    object-storage    Run pict-rs with object storage

Try running help commands for more runtime configuration options

$ pict-rs run filesystem -h
$ pict-rs run object-storage -h
$ pict-rs run filesystem sled -h
$ pict-rs run object-storage sled -h

See pict-rs.toml for more configuration

Example:

Run with the default configuration

$ ./pict-rs run

Running on all interfaces, port 8080, storing data in /opt/data

$ ./pict-rs run -a 0.0.0.0:8080 filesystem -p /opt/data/files sled -p /opt/data/sled-repo

Running locally, port 9000, storing data in data/, and converting all uploads to PNG

$ ./pict-rs run -a 127.0.0.1:9000 --media-format png filesystem -p data/files sled -p data/sled-repo

Running locally, port 8080, storing data in data/, and only allowing the thumbnail and identity filters

$ ./pict-rs run -a 127.0.0.1:8080 --media-filters thumbnail --media-filters identity filesystem -p data/files sled -p data/sled-repo

Running from a configuration file

$ ./pict-rs -c ./pict-rs.toml run

Migrating to object storage from filesystem storage

$ ./pict-rs filesystem -p data/sled-repo object-storage -a ACCESS_KEY -b BUCKET_NAME -r REGION -s SECRET_KEY

Dumping configuration overrides to a toml file

$ ./pict-rs --save-to pict-rs.toml run object-storage -a ACCESS_KEY -b pict-rs -r us-east-1 -s SECRET_KEY sled -p data/sled-repo

Docker

Run the following commands:

# Create a folder for the files (anywhere works)
$ mkdir ./pict-rs
$ cd ./pict-rs
$ mkdir -p volumes/pictrs
$ sudo chown -R 991:991 volumes/pictrs
$ wget https://git.asonix.dog/asonix/pict-rs/raw/branch/main/docker/prod/docker-compose.yml
$ sudo docker-compose up -d

Note

pict-rs makes use of the system's temporary folder. This is generally /tmp on linux
pict-rs makes use of an imagemagick security policy at /usr/lib/ImageMagick-$VERSION/config-Q16HDRI/policy.xml

Docker Development

With Arch

$ cargo build
$ sudo docker run --rm -it -p 8080:8080 -v "$(pwd):/mnt" archlinux:latest
# pacman -Syu imagemagick ffmepg perl-image-exiftool
# cp /mnt/docker/prod/root/usr/lib/ImageMagick-7.1.0/config-Q16HDRI/policy.xml /usr/lib/ImageMagick-7.1.0/config-Q16HDRI/
# PATH=$PATH:/usr/bin/vendor_perl RUST_LOG=debug /mnt/target/debug/pict-rs run

With Alpine

$ cross build --target=x86_64-unknown-linux-musl
$ sudo docker run --rm -it -p 8080:8080 -v "$(pwd):/mnt alpine:3.15
# apk add imagemagick ffmpeg exiftool
# cp /mnt/docker/prod/root/usr/lib/ImageMagick-7.1.0/config-Q16HDRI/policy.xml /usr/lib/ImageMagick-7.1.0/config-Q16HDRI/
# RUST_LOG=debug /mnt/target/x86_64-unknown-linux-musl/debug/pict-rs RUN

API

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

{
    "files": [
        {
            "delete_token": "JFvFhqJA98",
            "file": "lkWZDRvugm.jpg",
            "details": {
                "width": 800,
                "height": 800,
                "content_type": "image/jpeg",
                "created_at": "2022-04-08T18:33:42.957791698Z"
            }
        },
        {
            "delete_token": "kAYy9nk2WK",
            "file": "8qFS0QooAn.jpg",
            "details": {
                "width": 400,
                "height": 400,
                "content_type": "image/jpeg",
                "created_at": "2022-04-08T18:33:42.957791698Z"
            }
        },
        {
            "delete_token": "OxRpM3sf0Y",
            "file": "1hJaYfGE01.jpg",
            "details": {
                "width": 400,
                "height": 400,
                "content_type": "image/jpeg",
                "created_at": "2022-04-08T18:33:42.957791698Z"
            }
        }
    ],
    "msg": "ok"
}

POST /image/backgrounded Upload an image, like the /image endpoint, but don't wait to validate and process it. This endpoint returns the following JSON structure on success with a 202 Accepted status

{
    "uploads": [
        {
            "upload_id": "c61422e1-9294-4f1f-977f-c696b7939467",
        },
        {
            "upload_id": "62cc707f-725c-44b6-908f-2bd8946c3c29"
        }
    ],
    "msg": "ok"
}

GET /image/download?url={url}&backgrounded=(true|false)&ephemeral=(true|false) Download an image from a remote server, returning the same JSON payload as the POST /image endpoint by default.

if backgrounded is set to true, then the ingest processing will be queued for later and the response json will be the same as the POST /image/backgrounded endpoint.

if ephemeral is set to true, the downloaded image will be marked as a "cached" image, and automatically removed from pict-rs N hours after its last access. The duration is configurable with the --media-cache-duration run flag, or the [media] cache_duration toml option.

GET /image/backgrounded/claim?upload_id={uuid} Wait for a backgrounded upload to complete, claiming it's result Possible results:

200 Ok (validation and ingest complete):

{
    "files": [
        {
            "delete_token": "OxRpM3sf0Y",
            "file": "1hJaYfGE01.jpg",
            "details": {
                "width": 400,
                "height": 400,
                "content_type": "image/jpeg",
                "created_at": "2022-04-08T18:33:42.957791698Z"
            }
        }
    ],
    "msg": "ok"
}

422 Unprocessable Entity (validation or otherwise failure):

{
    "msg": "Error message about what went wrong with upload"
}

204 No Content (Upload validation and ingest is not complete, and waiting timed out) In this case, trying again is fine

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:

{
    "width": 800,
    "height": 537,
    "content_type": "image/webp",
    "created_at": "2022-04-08T18:33:42.957791698Z"
}

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/process_backgrounded.{ext}?src={file}&... queue transformations to be applied to a given file. This accepts the same arguments as the process.{ext} endpoint, but does not wait for the processing to complete.
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

The following endpoints are protected by an API key via the X-Api-Token header, and are disabled unless the --api-key option is passed to the binary or the PICTRS__SERVER__API_KEY environment variable is set.

A secure API key can be generated by any password generator.

POST /internal/import for uploading an image while preserving the filename as the first alias. The upload format and response format are the same as the POST /image endpoint.
POST /internal/purge?alias={alias} Purge a file by it's alias. This removes all aliases and files associated with the query.

This endpoint returns the following JSON
```
{
    "msg": "ok",
    "aliases": ["asdf.png"]
}
```
GET /internal/aliases?alias={alias} Get the aliases for a file by it's alias
- ?alias={alias} get aliases by alias
This endpiont returns the same JSON as the purge endpoint
DELETE /internal/variants Queue a cleanup for generated variants of uploaded images.

If any of the cleaned variants are fetched again, they will be re-generated.

Additionally, all endpoints support setting deadlines, after which the request will cease processing. To enable deadlines for your requests, you can set the X-Request-Deadline header to an i128 value representing the number of nanoseconds since the UNIX Epoch. A simple way to calculate this value is to use the time crate's OffsetDateTime::unix_timestamp_nanos method. For example,

// set deadline of 1ms
let deadline = time::OffsetDateTime::now_utc() + time::Duration::new(0, 1_000);

let request = client
    .get("http://pict-rs:8080/image/details/original/asdfghjkla.png")
    .insert_header(("X-Request-Deadline", deadline.unix_timestamp_nanos().to_string())))
    .send()
    .await;

Contributing

Feel free to open issues for anything you find an issue with. Please note that any contributed code will be licensed under the AGPLv3.

FAQ

Question: I want to configure it with yaml instead of toml

Answer: That's not a question, but you can configure pict-rs with json, hjson, yaml, ini, or toml. Writing configs in other formats is left as an exercise to the reader.

License

pict-rs is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.

pict-rs is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. This file is part of pict-rs.

You should have received a copy of the GNU General Public License along with pict-rs. If not, see http://www.gnu.org/licenses/.

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