chore: fix types and TypeScript

- updates TypeScript to version 5.8.3
- always uses Headers from undici
- Fix TypeScript compilation error by imporing AssertionError from node:assert

Author: philnash

package-lock.json

@@ -55,7 +55,7 @@
     "globals": "^15.14.0",
     "prettier": "^3.4.1",
     "tsx": "^4.19.2",
-    "typescript": "^5.7.2",
+    "typescript": "^5.8.3",
     "typescript-eslint": "^8.16.0"
   },
   "dependencies": {

package.json

@@ -15,7 +15,7 @@
 import { LangflowClient } from "./index.js";
 import { UserFile } from "./user_file.js";
 import { LangflowUploadResponseUserFile } from "./types.js";
-import { FormData } from "undici";
+import { FormData, Headers } from "undici";
 
 export class Files {
   client: LangflowClient;
@@ -46,7 +46,7 @@ export class Files {
     headers.set("Accept", "application/json");
     const { signal } = options;
     const response = (await this.client.request({
-      path: `/v2/files`,
+      path: "/v2/files",
       method: "GET",
       headers,
       signal,

src/files.ts

@@ -12,7 +12,7 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-import { FormData } from "undici";
+import { FormData, Headers } from "undici";
 
 import { LangflowClient } from "./index.js";
 import { FlowResponse } from "./flow_response.js";

src/flow.ts

@@ -12,7 +12,7 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-import { fetch } from "undici";
+import { fetch, Headers } from "undici";
 
 import pkg from "../package.json" with { type: "json" };
 import { LangflowError, LangflowRequestError } from "./errors.js";
@@ -111,14 +111,16 @@ export class LangflowClient {
     }
   }
 
-  #setHeaders(headers: Headers) {
+  #setHeaders(headers: Headers | Record<string, string>) {
+    const newHeaders =
+      headers instanceof Headers ? headers : new Headers(headers);
     for (const [header, value] of this.defaultHeaders.entries()) {
-      if (!headers.has(header)) {
-        headers.set(header, value);
+      if (!newHeaders.has(header)) {
+        newHeaders.set(header, value);
       }
     }
     if (this.apiKey) {
-      this.#setApiKey(this.apiKey, headers);
+      this.#setApiKey(this.apiKey, newHeaders);
     }
   }
 

src/index.ts

@@ -17,7 +17,7 @@ import * as assert from "node:assert/strict";
 import { readFile } from "node:fs/promises";
 import { LangflowClient } from "../index.js";
 import { createMockFetch, assertBlobEqual } from "./utils.js";
-import { Headers } from "undici";
+import { Headers, FormData } from "undici";
 import { UserFile } from "../user_file.js";
 
 const baseUrl = "http://localhost:3000";

src/test/files.test.ts

@@ -114,9 +114,10 @@ describe("Flow", () => {
         }
       );
 
-      const file = await readFile(
+      const buffer = await readFile(
         join(import.meta.dirname, "fixtures", "bodi.jpg")
       );
+      const file = new File([buffer], "bodi.jpg", { type: "image/jpeg" });
 
       const client = new LangflowClient({
         baseUrl: "http://localhost:7860",

src/test/flow.test.ts

@@ -13,7 +13,7 @@
 // limitations under the License.
 
 import { type Response, Request, RequestInit } from "undici";
-import { AssertionError } from "node:assert/strict";
+import { AssertionError } from "node:assert";
 
 type RequestInfo = string | URL | Request;
 

src/test/utils.ts

@@ -12,7 +12,7 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-import { fetch, FormData } from "undici";
+import type { fetch, FormData, Headers } from "undici";
 
 import { InputTypes, OutputTypes } from "./consts.js";