feat: node fetch casting

Author: amirai21

src/APIClient.ts

@@ -86,19 +86,19 @@ export abstract class APIClient {
         // eslint-disable-next-line @typescript-eslint/no-explicit-any
         appendBodyToFormData(formDataRequest.formData, opts.body as Record<string, any>);
       }
-  
+
       const headers = {
         ...opts?.headers,
         ...formDataRequest.headers,
       };
-  
+
       const options: FinalRequestOptions = {
         method: 'post',
         path: path,
         body: formDataRequest.formData,
         headers,
       };
-  
+
       return this.performRequest(options).then((response) => this.fetch.handleResponse<Rsp>(response) as Rsp);
     });
   }

src/fetch/NodeFetch.ts

@@ -1,6 +1,7 @@
 import { FinalRequestOptions, CrossPlatformResponse } from 'types';
 import { BaseFetch } from './BaseFetch';
 import { Stream, NodeSSEDecoder } from '../streaming';
+import { NodeHTTPBody } from 'types/API';
 
 export class NodeFetch extends BaseFetch {
   async call(url: string, options: FinalRequestOptions): Promise<CrossPlatformResponse> {
@@ -10,7 +11,7 @@ export class NodeFetch extends BaseFetch {
     return nodeFetch(url, {
       method: options.method,
       headers: options?.headers ? (options.headers as Record<string, string>) : undefined,
-      body: options?.body ? (options.body as import('form-data') | string) : undefined,
+      body: options?.body ? (options.body as NodeHTTPBody) : undefined,
     });
   }
 

src/types/API.ts

@@ -33,3 +33,5 @@ export type CrossPlatformReadableStream = ReadableStream<Uint8Array> | import('s
 export type UnifiedFormData = FormData | import('form-data');
 
 export type FormDataRequest = { formData: UnifiedFormData; headers: Headers };
+
+export type NodeHTTPBody = string | import('form-data');