actix-web/actix-multipart/README.md

# `actix-multipart`

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Multipart request & form support for Actix Web.

The [`Multipart`] extractor aims to support all kinds of `multipart/*` requests, including `multipart/form-data`, `multipart/related` and `multipart/mixed`. This is a lower-level extractor which supports reading [multipart fields](Field), in the order they are sent by the client.

Due to additional requirements for `multipart/form-data` requests, the higher level [`MultipartForm`] extractor and derive macro only supports this media type.

## Examples

```rust
use actix_web::{post, App, HttpServer, Responder};

use actix_multipart::form::{json::Json as MpJson, tempfile::TempFile, MultipartForm};
use serde::Deserialize;

#[derive(Debug, Deserialize)]
struct Metadata {
    name: String,
}

#[derive(Debug, MultipartForm)]
struct UploadForm {
    #[multipart(limit = "100MB")]
    file: TempFile,
    json: MpJson<Metadata>,
}

#[post("/videos")]
pub async fn post_video(MultipartForm(form): MultipartForm<UploadForm>) -> impl Responder {
    format!(
        "Uploaded file {}, with size: {}",
        form.json.name, form.file.size
    )
}

#[actix_web::main]
async fn main() -> std::io::Result<()> {
    HttpServer::new(move || App::new().service(post_video))
        .bind(("127.0.0.1", 8080))?
        .run()
        .await
}
```

cURL request:

```sh
curl -v --request POST \
  --url http://localhost:8080/videos \
  -F 'json={"name": "Cargo.lock"};type=application/json' \
  -F file=@./Cargo.lock
```

[`MultipartForm`]: struct@form::MultipartForm

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[More available in the examples repo &rarr;](https://github.com/actix/examples/tree/master/forms/multipart)