fix: don't try to read the content when the requested path is mapped to a directory

[daihuabin]

when the requested path is a folder Uncaught Error: EISDIR: illegal operation on a directory, read

[changeset-bot[bot]]

🦋 Changeset detected

Latest commit: c9fdb277e374aa839a44264c3dd99d7b20df4751

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[sapphi-red]

Thanks!