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b/examples/multipart_file/Cargo.toml @@ -0,0 +1,9 @@ +[package] +name = "multipart_file" +version = "0.1.0" +edition = "2021" + +[dependencies] +lib = { path = "../..", features = ["axum"] } +axum = "0.7.5" +tokio = { version = "1.38.0", features = ["rt-multi-thread", "macros"] } diff --git a/examples/multipart_file/src/main.rs b/examples/multipart_file/src/main.rs new file mode 100644 index 0000000..2ef4636 --- /dev/null +++ b/examples/multipart_file/src/main.rs @@ -0,0 +1,37 @@ +use axum::extract::DefaultBodyLimit; +use lib::axum::app::AppBuilder; +use lib::axum::extractor::MultipartFiles; +use lib::routes; + +// 0 or more +async fn with_optional_file(files: Option) -> String { + format!( + "{:?}", + files.map(|files| files + .0 + .into_iter() + .map(|file| file.filename) + .collect::>()) + ) +} + +// 1 or more files +async fn handler(MultipartFiles(files): MultipartFiles) -> String { + format!( + "{:?} uploaded", + files + .into_iter() + .map(|file| file.filename) + .collect::>() + ) +} + +#[tokio::main] +async fn main() { + let route = routes!( + get "/" => handler, + get "/opt" => with_optional_file + ) + .layer(DefaultBodyLimit::disable()); + AppBuilder::new().route(route).serve().await.unwrap(); +} diff --git a/src/axum/extractor.rs b/src/axum/extractor.rs index 1828c82..aeca22a 100644 --- a/src/axum/extractor.rs +++ b/src/axum/extractor.rs @@ -45,6 +45,7 @@ impl From> for ContentType { } } +#[derive(Debug, Clone, PartialEq)] pub struct File { pub filename: String, pub bytes: Vec, @@ -78,10 +79,12 @@ impl File { /// Extractor for a single file from a multipart request. /// Expects exactly one file. A file must have a name, bytes and optionally a content type. /// This extractor consumes the request and must ble placed last in the handler. +#[derive(Debug, Clone, PartialEq)] pub struct MultipartFile(pub File); /// Extractor for multiple files from a multipart request. /// Expects at least one file. A file must have a name, bytes and optionally a content type. /// This extractor consumes the request and must ble placed last in the handler. +#[derive(Debug, Clone, PartialEq)] pub struct MultipartFiles(pub Vec); #[derive(Debug, Error)] @@ -139,16 +142,13 @@ where type Rejection = MultipartFileRejection; async fn from_request(req: Request, state: &S) -> Result { - let mut multipart = Multipart::from_request(req, state).await?; - let fields = get_fields(&mut multipart).await?; - if fields.len() > 1 { + let multipart = Multipart::from_request(req, state).await?; + let files = get_files(multipart).await?; + if files.len() > 1 { Err(MultipartFileRejection::SeveralFiles) } else { - let field = fields - .into_iter() - .next() - .ok_or(MultipartFileRejection::NoFiles)?; - Ok(MultipartFile(File::from_field(field).await?)) + let field = files.first().ok_or(MultipartFileRejection::NoFiles)?; + Ok(MultipartFile(field.clone())) } } } @@ -161,27 +161,24 @@ where type Rejection = MultipartFileRejection; async fn from_request(req: Request, state: &S) -> Result { - let mut multipart = Multipart::from_request(req, state).await?; - let fields = get_fields(&mut multipart).await?; - if fields.is_empty() { + let multipart = Multipart::from_request(req, state).await?; + let files = get_files(multipart).await?; + if files.is_empty() { Err(MultipartFileRejection::NoFiles) } else { - let mut files = vec![]; - for field in fields.into_iter() { - files.push(File::from_field(field).await?); - } Ok(MultipartFiles(files)) } } } -async fn get_fields<'a>( - multipart: &'a mut Multipart, -) -> Result>, MultipartFileRejection> { - let fields: Vec = multipart.next_field().await?.into_iter().collect(); - if fields.is_empty() { +async fn get_files<'a>(mut multipart: Multipart) -> Result, MultipartFileRejection> { + let mut files = vec![]; + while let Some(field) = multipart.next_field().await? { + files.push(File::from_field(field).await?); + } + if files.is_empty() { Err(MultipartFileRejection::NoFiles) } else { - Ok(fields) + Ok(files) } }