fix: judge file format by server's content-type header

[qiu8310]

No description provided.

[qiu8310]

related to #106

[qiu8310]

There is another problem when running yarn test in sample directory, can't figure out why:

The first runTest is success, but second failed.

[qiu8310]

It looks like the error is caused by the warning:

WARNING: IPC handle "/Users/Mora/Workspace/mora/example-ts-vscode-extension/vscode-test/sample/.vscode-test/user-data/1.63.2-main.sock" is longer than 103 chars, try a shorter --user-data-dir

switch the project to a shorter folder, all tests is passed.

[connor4312]

Suggested change

	const contentType = download.headers['content-type'];
	const isZip = contentType ? contentType === 'application/zip' : url.endsWith('.zip');
	const isZip = download.headers['content-type'] === 'application/zip' ?? url.endsWith('.zip');

[qiu8310]

download.headers['content-type'] === 'application/zip' is always true or false, so url.endsWith('.zip') will never be reached.

[connor4312]

Oh, right. Nevermind then 👍

[connor4312]

Thanks for looking into this! Not sure why it didn't cause issues on my machine. One small cleanup comment