@nogoo9/mcp-server-cloud-fs / inferContentType

Function: inferContentType()

inferContentType(key, content): Promise<string>

Defined in: providers/content-type.ts:103

Infer content type from buffer magic bytes, falling back to file extension.

Uses the file-type library for robust magic-byte detection (100+ types). Text formats (.txt, .md, .json, etc.) have no magic numbers — they are handled by the extension fallback without raising an error.

Parameters

key

string

The object key / filename (used for extension lookup).

content

Buffer

The file content buffer (used for magic-byte sniffing).

Returns

Promise<string>

A MIME type string, or "application/octet-stream" if unknown.