first commit

packages/@n8n/nodes-langchain/nodes/vendors/Anthropic/helpers/utils.ts

@@ -0,0 +1,56 @@
+import FormData from 'form-data';
+import type { IDataObject, IExecuteFunctions, ILoadOptionsFunctions } from 'n8n-workflow';
+
+import { apiRequest } from '../transport';
+import type { File } from './interfaces';
+
+export function getMimeType(contentType?: string) {
+	return contentType?.split(';')?.[0];
+}
+
+export async function downloadFile(this: IExecuteFunctions, url: string, qs?: IDataObject) {
+	const downloadResponse = (await this.helpers.httpRequest({
+		method: 'GET',
+		url,
+		qs,
+		returnFullResponse: true,
+		encoding: 'arraybuffer',
+	})) as { body: ArrayBuffer; headers: IDataObject };
+
+	const mimeType =
+		getMimeType(downloadResponse.headers?.['content-type'] as string) ?? 'application/octet-stream';
+	const fileContent = Buffer.from(downloadResponse.body);
+	return {
+		fileContent,
+		mimeType,
+	};
+}
+
+export async function uploadFile(
+	this: IExecuteFunctions,
+	fileContent: Buffer,
+	mimeType: string,
+	fileName?: string,
+) {
+	const form = new FormData();
+	form.append('file', fileContent, {
+		filename: fileName ?? 'file',
+		contentType: mimeType,
+	});
+	return (await apiRequest.call(this, 'POST', '/v1/files', {
+		headers: form.getHeaders(),
+		body: form,
+	})) as File;
+}
+
+export function splitByComma(str: string) {
+	return str
+		.split(',')
+		.map((s) => s.trim())
+		.filter((s) => s);
+}
+
+export async function getBaseUrl(this: IExecuteFunctions | ILoadOptionsFunctions) {
+	const credentials = await this.getCredentials('anthropicApi');
+	return (credentials.url ?? 'https://api.anthropic.com') as string;
+}