fix dropbox upload file

apps/sim/lib/core/utils/user-file.ts

@@ -55,3 +55,20 @@ export function filterUserFileForDisplay(data: Record<string, unknown>): Record<
   }
   return filtered
 }
+
+/**
+ * Extracts base64 content from either a raw base64 string or a UserFile object.
+ * Useful for tools that accept file input in either format.
+ * @returns The base64 string, or undefined if not found
+ */
+export function extractBase64FromFileInput(
+  input: string | UserFileLike | null | undefined
+): string | undefined {
+  if (typeof input === 'string') {
+    return input
+  }
+  if (input?.base64) {
+    return input.base64
+  }
+  return undefined
+}

apps/sim/tools/dropbox/types.ts

@@ -1,3 +1,4 @@
+import type { UserFileLike } from '@/lib/core/utils/user-file'
 import type { ToolFileData, ToolResponse } from '@/tools/types'
 
 // ===== Core Types =====
@@ -70,7 +71,7 @@ export interface DropboxBaseParams {
 
 export interface DropboxUploadParams extends DropboxBaseParams {
   path: string
-  fileContent: string // Base64 encoded file content
+  fileContent: string | UserFileLike
   fileName?: string
   mode?: 'add' | 'overwrite'
   autorename?: boolean

apps/sim/tools/dropbox/upload.ts

@@ -1,3 +1,4 @@
+import { extractBase64FromFileInput } from '@/lib/core/utils/user-file'
 import type { DropboxUploadParams, DropboxUploadResponse } from '@/tools/dropbox/types'
 import type { ToolConfig } from '@/tools/types'
 
@@ -31,10 +32,10 @@ export const dropboxUploadTool: ToolConfig<DropboxUploadParams, DropboxUploadRes
         'The path in Dropbox where the file should be saved (e.g., /folder/document.pdf)',
     },
     fileContent: {
-      type: 'string',
+      type: 'json',
       required: true,
       visibility: 'user-or-llm',
-      description: 'The base64 encoded content of the file to upload',
+      description: 'The file to upload (UserFile object or base64 string)',
     },
     fileName: {
       type: 'string',
@@ -84,8 +85,12 @@ export const dropboxUploadTool: ToolConfig<DropboxUploadParams, DropboxUploadRes
       }
     },
     body: (params) => {
+      const base64Content = extractBase64FromFileInput(params.fileContent)
+      if (!base64Content) {
+        throw new Error('File Content cannot be extracted')
+      }
       // Decode base64 to raw binary bytes - Dropbox expects raw binary, not base64 text
-      return Buffer.from(params.fileContent, 'base64')
+      return Buffer.from(base64Content, 'base64')
     },
   },