update config name

Author: ijjk

packages/next/src/server/body-streams.ts

@@ -109,10 +109,6 @@ export function getCloneableBody<T extends IncomingMessage>(
           p2.push(null)
         }
       })
-      input.on('error', (err) => {
-        p1.destroy(err)
-        p2.destroy(err)
-      })
       buffered = p2
       return p1
     },

packages/next/src/server/config-shared.ts

@@ -798,10 +798,10 @@ export interface ExperimentalConfig {
   isolatedDevBuild?: boolean
 
   /**
-   * Body size limit for cloning request bodies in middleware.
+   * Body size limit for request bodies with middleware configured.
    * Defaults to 10MB. Can be specified as a number (bytes) or string (e.g. '5mb').
    */
-  clientMaxBodySize?: SizeLimit
+  middlewareClientMaxBodySize?: SizeLimit
 
   /**
    * Enable the Model Context Protocol (MCP) server for AI-assisted development.

packages/next/src/server/config.ts

@@ -714,17 +714,18 @@ function assignDefaultsAndValidate(
     }
   }
 
-  // Normalize & validate experimental.clientMaxBodySize
-  if (typeof result.experimental?.clientMaxBodySize !== 'undefined') {
-    const clientMaxBodySize = result.experimental.clientMaxBodySize
+  // Normalize & validate experimental.middlewareClientMaxBodySize
+  if (typeof result.experimental?.middlewareClientMaxBodySize !== 'undefined') {
+    const middlewareClientMaxBodySize =
+      result.experimental.middlewareClientMaxBodySize
     let normalizedValue: number
 
-    if (typeof clientMaxBodySize === 'string') {
+    if (typeof middlewareClientMaxBodySize === 'string') {
       const bytes =
         require('next/dist/compiled/bytes') as typeof import('next/dist/compiled/bytes')
-      normalizedValue = bytes.parse(clientMaxBodySize)
-    } else if (typeof clientMaxBodySize === 'number') {
-      normalizedValue = clientMaxBodySize
+      normalizedValue = bytes.parse(middlewareClientMaxBodySize)
+    } else if (typeof middlewareClientMaxBodySize === 'number') {
+      normalizedValue = middlewareClientMaxBodySize
     } else {
       throw new Error(
         'Client Max Body Size must be a valid number (bytes) or filesize format string (e.g., "5mb")'
@@ -736,7 +737,7 @@ function assignDefaultsAndValidate(
     }
 
     // Store the normalized value as a number
-    result.experimental.clientMaxBodySize = normalizedValue
+    result.experimental.middlewareClientMaxBodySize = normalizedValue
   }
 
   warnOptionHasBeenMovedOutOfExperimental(

packages/next/src/server/lib/router-utils/resolve-routes.ts

@@ -175,7 +175,7 @@ export function getResolveRoutes(
     addRequestMeta(req, 'initProtocol', protocol)
 
     if (!isUpgradeReq) {
-      const bodySizeLimit = config.experimental.clientMaxBodySize as
+      const bodySizeLimit = config.experimental.middlewareClientMaxBodySize as
         | number
         | undefined
       addRequestMeta(req, 'clonableBody', getCloneableBody(req, bodySizeLimit))

packages/next/src/server/next-server.ts

@@ -1950,9 +1950,8 @@ export default class NextNodeServer extends BaseServer<
     addRequestMeta(req, 'initProtocol', protocol)
 
     if (!isUpgradeReq) {
-      const bodySizeLimit = this.nextConfig.experimental?.clientMaxBodySize as
-        | number
-        | undefined
+      const bodySizeLimit = this.nextConfig.experimental
+        ?.middlewareClientMaxBodySize as number | undefined
       addRequestMeta(
         req,
         'clonableBody',

test/e2e/client-max-body-size/index.test.ts

@@ -69,7 +69,7 @@ describe('client-max-body-size', () => {
       files: __dirname,
       nextConfig: {
         experimental: {
-          clientMaxBodySize: '5mb',
+          middlewareClientMaxBodySize: '5mb',
         },
       },
     })
@@ -117,7 +117,7 @@ describe('client-max-body-size', () => {
       files: __dirname,
       nextConfig: {
         experimental: {
-          clientMaxBodySize: 2 * 1024 * 1024, // 2MB in bytes
+          middlewareClientMaxBodySize: 2 * 1024 * 1024, // 2MB in bytes
         },
       },
     })
@@ -165,7 +165,7 @@ describe('client-max-body-size', () => {
       files: __dirname,
       nextConfig: {
         experimental: {
-          clientMaxBodySize: '50mb',
+          middlewareClientMaxBodySize: '50mb',
         },
       },
     })