[package]
name = "example-multipart-form"
version = "0.1.0"
edition = "2021"
publish = false
[dependencies]
axum = { path = "../../axum", features = ["multipart"] }
tokio = { version = "1.0", features = ["full"] }
tower-http = { version = "0.6.1", features = ["limit", "trace"] }
tracing = "0.1"
tracing-subscriber = { version = "0.3", features = ["env-filter"] }
//! Run with
//!
//! ```not_rust
//! cargo run -p example-multipart-form
//! ```
use axum::{
extract::{DefaultBodyLimit, Multipart},
response::Html,
routing::get,
Router,
};
use tower_http::limit::RequestBodyLimitLayer;
use tracing_subscriber::{layer::SubscriberExt, util::SubscriberInitExt};
#[tokio::main]
async fn main() {
tracing_subscriber::registry()
.with(
tracing_subscriber::EnvFilter::try_from_default_env().unwrap_or_else(|_| {
format!("{}=debug,tower_http=debug", env!("CARGO_CRATE_NAME")).into()
}),
)
.with(tracing_subscriber::fmt::layer())
.init();
// build our application with some routes
let app = Router::new()
.route("/", get(show_form).post(accept_form))
.layer(DefaultBodyLimit::disable())
.layer(RequestBodyLimitLayer::new(
250 * 1024 * 1024, /* 250mb */
))
.layer(tower_http::trace::TraceLayer::new_for_http());
// run it with hyper
let listener = tokio::net::TcpListener::bind("127.0.0.1:3000")
.await
.unwrap();
tracing::debug!("listening on {}", listener.local_addr().unwrap());
axum::serve(listener, app).await.unwrap();
}
async fn show_form() -> Html<&'static str> {
Html(
r#"
<!doctype html>
<html>
<head></head>
<body>
<form action="/" method="post" enctype="multipart/form-data">
<label>
Upload file:
<input type="file" name="file" multiple>
</label>
<input type="submit" value="Upload files">
</form>
</body>
</html>
"#,
)
}
async fn accept_form(mut multipart: Multipart) {
while let Some(field) = multipart.next_field().await.unwrap() {
let name = field.name().unwrap().to_string();
let file_name = field.file_name().unwrap().to_string();
let content_type = field.content_type().unwrap().to_string();
let data = field.bytes().await.unwrap();
println!(
"Length of `{name}` (`{file_name}`: `{content_type}`) is {} bytes",
data.len()
);
}
}