Update multer (#2433)

axum-extra/src/extract/multipart.rs

@@ -12,7 +12,7 @@ use axum::{
 use futures_util::stream::Stream;
 use http::{
     header::{HeaderMap, CONTENT_TYPE},
-    HeaderName, HeaderValue, Request, StatusCode,
+    Request, StatusCode,
 };
 use std::{
     error::Error,
@@ -115,22 +115,7 @@ impl Multipart {
             .map_err(MultipartError::from_multer)?;
 
         if let Some(field) = field {
-            // multer still uses http 0.2 which means we cannot directly expose
-            // `multer::Field::headers`. Instead we have to eagerly convert the headers into http
-            // 1.0
-            //
-            // When the next major version of multer is published we can remove this.
-            let mut headers = HeaderMap::with_capacity(field.headers().len());
-            headers.extend(field.headers().into_iter().map(|(name, value)| {
-                let name = HeaderName::from_bytes(name.as_ref()).unwrap();
-                let value = HeaderValue::from_bytes(value.as_ref()).unwrap();
-                (name, value)
-            }));
-
-            Ok(Some(Field {
-                inner: field,
-                headers,
-            }))
+            Ok(Some(Field { inner: field }))
         } else {
             Ok(None)
         }
@@ -149,7 +134,6 @@ impl Multipart {
 #[derive(Debug)]
 pub struct Field {
     inner: multer::Field<'static>,
-    headers: HeaderMap,
 }
 
 impl Stream for Field {
@@ -184,7 +168,7 @@ impl Field {
 
     /// Get a map of headers as [`HeaderMap`].
     pub fn headers(&self) -> &HeaderMap {
-        &self.headers
+        self.inner.headers()
     }
 
     /// Get the full data of the field as [`Bytes`].