Method downloadMessageResource

src/runtime/adapters/feishu.ts:447–483

(
    messageId: string,
    fileKey: string,
    type: FeishuSupportedResourceType,
  )

    filename: string,
  ): string | undefined {
    return detectMimeType(filename) || (resource.type === "image" ? "image/png" : undefined);
  }

  private async downloadMessageResource(
    messageId: string,
    fileKey: string,
    type: FeishuSupportedResourceType,
  ): Promise<Buffer> {
    if (!this.channel) {
      throw new Error("[Feishu] Channel not initialized");
    }

    const rawClient = this.channel.rawClient as
      | {
          im?: {
            v1?: {
              messageResource?: {
                get?: (payload: {
                  path: { message_id: string; file_key: string };
                  params: { type: string };
                }) => Promise<{ getReadableStream: () => NodeJS.ReadableStream }>;
              };
            };
          };
        }
      | undefined;
    const getMessageResource = rawClient?.im?.v1?.messageResource?.get;
    if (getMessageResource) {
      const response = await getMessageResource({
        path: {
          message_id: messageId,
          file_key: fileKey,
        },
        params: { type },
      });
      return streamToBuffer(response.getReadableStream());
    }

    return this.channel.downloadResource(fileKey, type);
  }