[gguf] Ability to specify some fetch headers (#653)

cc @ngxson too

---------

Co-authored-by: Eliott C. <[email protected]>

packages/gguf/src/gguf.ts

@@ -64,6 +64,7 @@ class RangeView {
 			 * Custom fetch function to use instead of the default one, for example to use a proxy or edit headers.
 			 */
 			fetch?: typeof fetch;
+			additionalFetchHeaders?: Record<string, string>;
 		}
 	) {
 		this.chunk = 0;
@@ -82,6 +83,7 @@ class RangeView {
 			await (
 				await (this.params?.fetch ?? fetch)(this.url, {
 					headers: {
+						...(this.params?.additionalFetchHeaders ?? {}),
 						Range: `bytes=${range[0]}-${range[1]}`,
 					},
 				})
@@ -209,6 +211,7 @@ export async function gguf(
 		 * Custom fetch function to use instead of the default one, for example to use a proxy or edit headers.
 		 */
 		fetch?: typeof fetch;
+		additionalFetchHeaders?: Record<string, string>;
 		computeParametersCount: true;
 	}
 ): Promise<GGUFParseOutput & { parameterCount: number }>;
@@ -219,6 +222,7 @@ export async function gguf(
 		 * Custom fetch function to use instead of the default one, for example to use a proxy or edit headers.
 		 */
 		fetch?: typeof fetch;
+		additionalFetchHeaders?: Record<string, string>;
 	}
 ): Promise<GGUFParseOutput>;
 export async function gguf(
@@ -228,6 +232,7 @@ export async function gguf(
 		 * Custom fetch function to use instead of the default one, for example to use a proxy or edit headers.
 		 */
 		fetch?: typeof fetch;
+		additionalFetchHeaders?: Record<string, string>;
 		computeParametersCount?: boolean;
 	}
 ): Promise<GGUFParseOutput & { parameterCount?: number }> {