multipart support

Cargo.lock

@@ -113,6 +113,7 @@ dependencies = [
  "matchit",
  "memchr",
  "mime",
+ "multer",
  "percent-encoding",
  "pin-project-lite",
  "rustversion",
@@ -1087,7 +1088,7 @@ version = "1.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "e2abad23fbc42b3700f2f279844dc832adb2b2eb069b2df918f455c4e18cc646"
 dependencies = [
- "spin",
+ "spin 0.5.2",
 ]
 
 [[package]]
@@ -1173,6 +1174,24 @@ dependencies = [
  "windows-sys",
 ]
 
+[[package]]
+name = "multer"
+version = "2.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "01acbdc23469fd8fe07ab135923371d5f5a422fbf9c522158677c8eb15bc51c2"
+dependencies = [
+ "bytes",
+ "encoding_rs",
+ "futures-util",
+ "http",
+ "httparse",
+ "log",
+ "memchr",
+ "mime",
+ "spin 0.9.8",
+ "version_check",
+]
+
 [[package]]
 name = "num-bigint"
 version = "0.4.4"
@@ -1681,7 +1700,7 @@ dependencies = [
  "cc",
  "libc",
  "once_cell",
- "spin",
+ "spin 0.5.2",
  "untrusted",
  "web-sys",
  "winapi",
@@ -2030,6 +2049,12 @@ version = "0.5.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "6e63cff320ae2c57904679ba7cb63280a3dc4613885beafb148ee7bf9aa9042d"
 
+[[package]]
+name = "spin"
+version = "0.9.8"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6980e8d7511241f8acf4aebddbb1ff938df5eebe98691418c4468d0b72a96a67"
+
 [[package]]
 name = "spki"
 version = "0.7.2"

Cargo.toml

@@ -9,7 +9,7 @@ edition = "2021"
 tokio = { version = "1.33", features = ["full"] }
 tokio-util = { version="0.7", features = ["io"]}
 futures-util = "0.3"
-axum = {version="0.6", features=["macros", "headers"]}
+axum = {version="0.6", features=["macros", "headers", "multipart"]}
 serde = "1.0"
 toml = "0.8"
 render = { git="https://github.com/render-rs/render.rs" }

src/error.rs

@@ -32,6 +32,9 @@ pub enum Error {
 
     #[error("oidc redirect")]
     Oidc(Response),
+
+    #[error("invalid multipart")]
+    InvalidMultipart,
 }
 
 impl IntoResponse for Error {
@@ -44,6 +47,9 @@ impl IntoResponse for Error {
             }
             Self::ParseTtl => (StatusCode::BAD_REQUEST, "invalid ttl class\n").into_response(),
             Self::Oidc(response) => response.into_response(),
+            Self::InvalidMultipart => {
+                (StatusCode::BAD_REQUEST, "invalid multipart data").into_response()
+            }
             _ => {
                 error!("{:?}", self);
                 (StatusCode::INTERNAL_SERVER_ERROR, "internal server error\n").into_response()

src/main.rs

@@ -7,11 +7,15 @@ use std::{
 };
 
 use axum::{
-    body::StreamBody,
+    async_trait,
+    body::{HttpBody, StreamBody},
     debug_handler,
-    extract::{BodyStream, FromRef, Path, Query, State},
+    extract::{BodyStream, FromRef, FromRequest, Multipart, Path, Query, State},
     headers::ContentType,
-    http::{header, HeaderMap, StatusCode},
+    http::{
+        header::{self, CONTENT_TYPE},
+        HeaderMap, Request, StatusCode,
+    },
     response::{Html, IntoResponse, Redirect, Response},
     routing::get,
     Router, TypedHeader,
@@ -20,6 +24,7 @@ use axum_oidc::{
     jwt::{Claims, JwtApplication},
     oidc::{self, EmptyAdditionalClaims, OidcApplication, OidcExtractor},
 };
+use bytes::Bytes;
 use chacha20::{
     cipher::{KeyIvInit, StreamCipher},
     ChaCha20,
@@ -199,7 +204,7 @@ async fn post_item(
     Query(params): Query<PostQuery>,
     State(app_state): State<AppState>,
     content_type: Option<TypedHeader<ContentType>>,
-    mut stream: BodyStream,
+    data: MultipartOrStream,
 ) -> HandlerResult<impl IntoResponse> {
     let phrase = Phrase::from_str(&phrase)?;
     let id = Id::from_phrase(&phrase, &app_state.id_salt);
@@ -221,14 +226,34 @@ async fn post_item(
         let mut etag_hasher = Sha3_256::new();
         let mut size = 0;
 
-        while let Some(chunk) = stream.next().await {
-            let mut buf = chunk.unwrap_or_default().to_vec();
-            etag_hasher.update(&buf);
-            size += buf.len() as u64;
-            cipher.apply_keystream(&mut buf);
-            writer.write_all(&buf).await?;
+        match data {
+            MultipartOrStream::Stream(mut stream) => {
+                while let Some(chunk) = stream.next().await {
+                    let mut buf = chunk.unwrap_or_default().to_vec();
+                    etag_hasher.update(&buf);
+                    size += buf.len() as u64;
+                    cipher.apply_keystream(&mut buf);
+                    writer.write_all(&buf).await?;
+                }
+            }
+            MultipartOrStream::Multipart(mut multipart) => {
+                while let Some(mut field) = multipart
+                    .next_field()
+                    .await
+                    .map_err(|_| Error::InvalidMultipart)?
+                {
+                    if field.name().unwrap_or_default() == "file" {
+                        while let Some(chunk) = field.chunk().await.unwrap_or_default() {
+                            let mut buf = chunk.to_vec();
+                            etag_hasher.update(&buf);
+                            size += buf.len() as u64;
+                            cipher.apply_keystream(&mut buf);
+                            writer.write_all(&buf).await?;
+                        }
+                    }
+                }
+            }
         }
-
         writer.flush().await?;
 
         let now = SystemTime::now().duration_since(UNIX_EPOCH)?.as_secs();
@@ -325,3 +350,41 @@ async fn get_item(
         Ok((StatusCode::OK, headers, body).into_response())
     }
 }
+
+enum MultipartOrStream {
+    Multipart(Multipart),
+    Stream(BodyStream),
+}
+
+#[async_trait]
+impl<S, B> FromRequest<S, B> for MultipartOrStream
+where
+    B: Send + 'static + HttpBody,
+    S: Send + Sync,
+    Bytes: From<<B as HttpBody>::Data>,
+    <B as HttpBody>::Error:
+        Send + Sync + Into<Box<(dyn std::error::Error + Send + Sync + 'static)>>,
+{
+    type Rejection = Response;
+
+    async fn from_request(req: Request<B>, state: &S) -> Result<Self, Self::Rejection> {
+        let is_multipart = req
+            .headers()
+            .get(CONTENT_TYPE)
+            .map(|x| x == "multipart/form-data")
+            .unwrap_or_default();
+        if is_multipart {
+            Ok(Self::Multipart(
+                Multipart::from_request(req, state)
+                    .await
+                    .map_err(|x| x.into_response())?,
+            ))
+        } else {
+            Ok(Self::Stream(
+                BodyStream::from_request(req, state)
+                    .await
+                    .map_err(|x| x.into_response())?,
+            ))
+        }
+    }
+}