fix(brevilabs): rewrite uploads via requestUrl multipart (W8/9) (#2399)

* fix(brevilabs): rewrite uploads via requestUrl multipart (W8/9)

Ninth of nine source workspaces splitting #2397. Replaces native
fetch(FormData) calls in brevilabsClient with Obsidian's requestUrl
plus a manually-constructed multipart body. This is required because
Obsidian's CORS-bypass path can't handle native FormData streams.

- src/LLMProviders/brevilabsClient.ts: buildMultipartFromFormData
  helper builds a Uint8Array body with explicit boundary; uploads now
  flow through requestUrl with a Content-Type header that includes
  the boundary string
- __mocks__/obsidian.js: requestUrl jest mock + __setRequestUrlImpl
  helper so tests can swap in per-case responses

Manual verification required: image upload, PDF upload, audio
transcription, error path. Plus license needed to exercise real
uploads.

W0 already merged.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

* chore(network): dedupe brevilabs response parsing + bound model-fetch timeout

- Extract parseBrevilabsResponse helper so makeRequest and
  makeFormDataRequest share one parse/error path.
- Wrap fetchModelsForProvider's safeFetch in a 10s Promise.race
  (safeFetch ignores AbortSignal, so a dead base URL could hang
  the model-import dialog forever).
- Preserve real @/utils exports in selfHostServices test mock via
  jest.requireActual.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

* chore(lint): fix typescript-eslint violations in brevilabs + tests

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

---------

Co-authored-by: Claude Opus 4.7 <noreply@anthropic.com>

__mocks__/obsidian.js

@@ -1,10 +1,25 @@
 // __mocks__/obsidian.js
 import { parse as parseYamlString } from "yaml";
 
+// Per-test overrides set via the exported `__setRequestUrlImpl` helper.
+// Default: empty success response. Tests that exercise network paths should
+// install their own implementation.
+let requestUrlImpl = jest.fn().mockResolvedValue({
+  status: 200,
+  text: "",
+  json: undefined,
+  arrayBuffer: new ArrayBuffer(0),
+  headers: {},
+});
+
 module.exports = {
   // Reason: normalizePath is used by projectPaths.ts; identity function is sufficient for tests
   normalizePath: jest.fn().mockImplementation((p) => p),
   moment: jest.requireActual("moment"),
+  requestUrl: (...args) => requestUrlImpl(...args),
+  __setRequestUrlImpl: (impl) => {
+    requestUrlImpl = impl;
+  },
   Vault: jest.fn().mockImplementation(() => {
     return {
       getMarkdownFiles: jest.fn().mockImplementation(() => {

src/LLMProviders/CustomOpenAIEmbeddings.ts

@@ -1,3 +1,4 @@
+import { safeFetchNoThrow } from "@/utils";
 import { OpenAIEmbeddings } from "@langchain/openai";
 
 export class CustomOpenAIEmbeddings extends OpenAIEmbeddings {
@@ -35,7 +36,7 @@ export class CustomOpenAIEmbeddings extends OpenAIEmbeddings {
     const baseURL = configuration?.baseURL || "https://api.openai.com/v1";
     const url = `${baseURL}/embeddings`;
     const apiKey = this.customConfig.apiKey as string;
-    const fetchFn = configuration?.fetch || fetch;
+    const fetchFn = configuration?.fetch || safeFetchNoThrow;
 
     const response = await fetchFn(url, {
       method: "POST",

src/LLMProviders/brevilabsClient.ts

@@ -4,8 +4,86 @@ import { MissingPlusLicenseError } from "@/error";
 import { logInfo } from "@/logger";
 import { turnOffPlus, turnOnPlus } from "@/plusUtils";
 import { getSettings } from "@/settings/model";
-import { safeFetchNoThrow } from "@/utils";
 import { arrayBufferToBase64 } from "@/utils/base64";
+import { requestUrl } from "obsidian";
+
+/**
+ * Build a multipart/form-data body buffer from a FormData instance.
+ * Returned as an ArrayBuffer suitable for passing to Obsidian's requestUrl.
+ *
+ * @param formData - FormData containing strings and/or File/Blob entries.
+ * @returns The serialized multipart body and the Content-Type header (including boundary).
+ */
+async function buildMultipartFromFormData(
+  formData: FormData
+): Promise<{ body: ArrayBuffer; contentType: string }> {
+  const boundary = `----CopilotBoundary${Math.random().toString(16).slice(2)}${Date.now().toString(16)}`;
+  const encoder = new TextEncoder();
+  const parts: Uint8Array[] = [];
+
+  for (const [name, value] of formData.entries()) {
+    parts.push(encoder.encode(`--${boundary}\r\n`));
+    if (value instanceof Blob) {
+      const filename = value instanceof File ? value.name : "blob";
+      const contentType = value.type || "application/octet-stream";
+      parts.push(
+        encoder.encode(
+          `Content-Disposition: form-data; name="${name}"; filename="${filename}"\r\n` +
+            `Content-Type: ${contentType}\r\n\r\n`
+        )
+      );
+      const buf = await value.arrayBuffer();
+      parts.push(new Uint8Array(buf));
+      parts.push(encoder.encode("\r\n"));
+    } else {
+      parts.push(encoder.encode(`Content-Disposition: form-data; name="${name}"\r\n\r\n`));
+      parts.push(encoder.encode(String(value)));
+      parts.push(encoder.encode("\r\n"));
+    }
+  }
+  parts.push(encoder.encode(`--${boundary}--\r\n`));
+
+  const totalLength = parts.reduce((sum, p) => sum + p.byteLength, 0);
+  const out = new Uint8Array(totalLength);
+  let offset = 0;
+  for (const part of parts) {
+    out.set(part, offset);
+    offset += part.byteLength;
+  }
+  return {
+    body: out.buffer.slice(out.byteOffset, out.byteOffset + out.byteLength),
+    contentType: `multipart/form-data; boundary=${boundary}`,
+  };
+}
+
+/**
+ * Normalize a requestUrl response into the {data, error} shape used by Brevilabs API methods.
+ * Handles the case where `response.json` is a raw string (non-JSON body, e.g. HTML error page).
+ */
+function parseBrevilabsResponse<T>(
+  response: { status: number; json: unknown },
+  endpoint: string
+): { data: T | null; error?: Error } {
+  let data: unknown = response.json;
+  if (typeof data === "string") {
+    try {
+      data = JSON.parse(data);
+    } catch {
+      // Non-JSON body — fall through to status-based error.
+    }
+  }
+  if (response.status < 200 || response.status >= 300) {
+    const detail = (data as { detail?: { reason?: string; error?: string } } | null)?.detail;
+    if (detail?.reason) {
+      const error = new Error(detail.reason);
+      if (detail.error) error.name = detail.error;
+      return { data: null, error };
+    }
+    return { data: null, error: new Error(`HTTP error: ${response.status}`) };
+  }
+  logInfo(`[API ${endpoint} request]:`, data);
+  return { data: data as T };
+}
 
 export interface RerankResponse {
   response: {
@@ -123,25 +201,14 @@ export class BrevilabsClient {
     if (!excludeAuthHeader) {
       headers.Authorization = `Bearer ${await getDecryptedKey(getSettings().plusLicenseKey)}`;
     }
-    const response = await safeFetchNoThrow(url.toString(), {
+    const response = await requestUrl({
+      url: url.toString(),
       method,
       headers,
       ...(method === "POST" && { body: JSON.stringify(body) }),
+      throw: false,
     });
-    const data = await response.json();
+    return parseBrevilabsResponse<T>(response, endpoint);
-    if (!response.ok) {
-      try {
-        const errorDetail = data.detail;
-        const error = new Error(errorDetail.reason as string);
-        error.name = errorDetail.error as string;
-        return { data: null, error };
-      } catch {
-        return { data: null, error: new Error("Unknown error") };
-      }
-    }
-    logInfo(`[API ${endpoint} request]:`, data);
-
-    return { data };
   }
 
   private async makeFormDataRequest<T>(
@@ -159,29 +226,21 @@ export class BrevilabsClient {
     const url = new URL(`${BREVILABS_API_BASE_URL}${endpoint}`);
 
     try {
-      const response = await fetch(url.toString(), {
+      // Build multipart body manually for requestUrl (does not natively support FormData).
+      const { body, contentType } = await buildMultipartFromFormData(formData);
+
+      const response = await requestUrl({
+        url: url.toString(),
         method: "POST",
         headers: {
-          // No Content-Type header - browser will set it automatically with boundary
+          "Content-Type": contentType,
           Authorization: `Bearer ${await getDecryptedKey(getSettings().plusLicenseKey)}`,
           "X-Client-Version": this.pluginVersion,
         },
-        body: formData,
+        body,
+        throw: false,
       });
-
+      return parseBrevilabsResponse<T>(response, `${endpoint} form-data`);
-      const data = await response.json();
-      if (!response.ok) {
-        try {
-          const errorDetail = data.detail;
-          const error = new Error(errorDetail.reason as string);
-          error.name = errorDetail.error as string;
-          return { data: null, error };
-        } catch {
-          return { data: null, error: new Error(`HTTP error: ${response.status}`) };
-        }
-      }
-      logInfo(`[API ${endpoint} form-data request]:`, data);
-      return { data };
     } catch (error) {
       return { data: null, error: error instanceof Error ? error : new Error(String(error)) };
     }

src/LLMProviders/selfHostServices.test.ts

@@ -17,9 +17,15 @@ jest.mock("@/logger", () => ({
   logWarn: jest.fn(),
 }));
 
-// Mock global fetch
+// Mock safeFetchNoThrow (the requestUrl-backed wrapper used in place of fetch)
 const mockFetch = jest.fn();
-window.fetch = mockFetch;
+jest.mock("@/utils", () => {
+  const actual = jest.requireActual<Record<string, unknown>>("@/utils");
+  return {
+    ...actual,
+    safeFetchNoThrow: (url: string, options?: RequestInit): unknown => mockFetch(url, options),
+  };
+});
 
 beforeEach(() => {
   jest.clearAllMocks();

src/LLMProviders/selfHostServices.ts

@@ -2,6 +2,7 @@ import { type Youtube4llmResponse } from "@/LLMProviders/brevilabsClient";
 import { getDecryptedKey } from "@/encryptionService";
 import { logError, logInfo } from "@/logger";
 import { getSettings } from "@/settings/model";
+import { safeFetchNoThrow } from "@/utils";
 
 const FIRECRAWL_SEARCH_URL = "https://api.firecrawl.dev/v2/search";
 const PERPLEXITY_CHAT_URL = "https://api.perplexity.ai/chat/completions";
@@ -45,7 +46,7 @@ export function hasSelfHostSearchKey(): boolean {
 async function firecrawlSearch(query: string, apiKey: string): Promise<SelfHostWebSearchResult> {
   const startTime = Date.now();
 
-  const response = await fetch(FIRECRAWL_SEARCH_URL, {
+  const response = await safeFetchNoThrow(FIRECRAWL_SEARCH_URL, {
     method: "POST",
     headers: {
       Authorization: `Bearer ${apiKey}`,
@@ -95,7 +96,7 @@ async function perplexitySonarSearch(
   query: string,
   apiKey: string
 ): Promise<SelfHostWebSearchResult> {
-  const response = await fetch(PERPLEXITY_CHAT_URL, {
+  const response = await safeFetchNoThrow(PERPLEXITY_CHAT_URL, {
     method: "POST",
     headers: {
       Authorization: `Bearer ${apiKey}`,
@@ -144,7 +145,7 @@ export async function selfHostYoutube4llm(url: string): Promise<Youtube4llmRespo
 
   const transcriptUrl = `${SUPADATA_TRANSCRIPT_URL}?url=${encodeURIComponent(url)}&mode=auto&text=true`;
 
-  const response = await fetch(transcriptUrl, {
+  const response = await safeFetchNoThrow(transcriptUrl, {
     method: "GET",
     headers: {
       "x-api-key": apiKey,
@@ -189,7 +190,7 @@ async function pollSupadataJob(
   while (Date.now() < deadline) {
     await new Promise((resolve) => window.setTimeout(resolve, SUPADATA_POLL_INTERVAL));
 
-    const pollResponse = await fetch(pollUrl, {
+    const pollResponse = await safeFetchNoThrow(pollUrl, {
       method: "GET",
       headers: {
         "x-api-key": apiKey,

src/settings/v2/utils/modelActions.ts

@@ -3,7 +3,7 @@ import { ChatModelProviders, SettingKeyProviders } from "@/constants";
 import { getDecryptedKey } from "@/encryptionService";
 import { GitHubCopilotProvider } from "@/LLMProviders/githubCopilot/GitHubCopilotProvider";
 import ProjectManager from "@/LLMProviders/projectManager";
-import { logError, logWarn } from "@/logger";
+import { logError } from "@/logger";
 import { parseModelsResponse, StandardModel } from "@/settings/providerModels";
 import { err2String, getProviderInfo, safeFetch } from "@/utils";
 import { getApiKeyForProvider } from "@/utils/modelUtils";
@@ -66,43 +66,18 @@ export async function fetchModelsForProvider(
       };
     }
 
-    const tryFetch = async (useSafeFetch: boolean) => {
+    // Use safeFetch (requestUrl) to bypass CORS on desktop and mobile. safeFetch
-      const controller = new AbortController();
+    // does not honor AbortSignal, so bound the call manually via Promise.race.
-      const timeoutId = window.setTimeout(() => controller.abort(), 3000);
+    const response = await Promise.race([
-
+      safeFetch(url, { headers, method: "GET" }),
-      try {
+      new Promise<never>((_, reject) =>
-        const response = await (useSafeFetch ? safeFetch : fetch)(url, {
+        window.setTimeout(() => reject(new Error("Request timed out after 10s")), 10000)
-          headers,
+      ),
-          signal: controller.signal,
+    ]);
-          method: "GET",
+    if (!response.ok) {
-        });
+      const msg = err2String(await response.json());
-
+      logError(msg);
-        if (!response.ok) {
+      throw new Error(`Failed to fetch models: ${response.statusText} \n detail: ` + msg);
-          const msg = err2String(await response.json());
-          logError(msg);
-          throw new Error(`Failed to fetch models: ${response.statusText} \n detail: ` + msg);
-        }
-        return response;
-      } finally {
-        window.clearTimeout(timeoutId);
-      }
-    };
-
-    let response;
-    try {
-      response = await tryFetch(false);
-    } catch (firstError) {
-      logWarn("First fetch attempt failed, trying with safeFetch...");
-      try {
-        response = await tryFetch(true);
-      } catch (error) {
-        const msg =
-          "\nwithout CORS Error: " +
-          err2String(firstError) +
-          "\nwith CORS Error: " +
-          err2String(error);
-        throw new Error(msg);
-      }
     }
 
     const rawData = await response.json();