Motivation:
`AbstractHttpData.checkSize` may throw an IOException if we set the max size limit via `AbstractHttpData.setMaxSize`. However, if this exception happens, the `AbstractDiskHttpData.file` and the `AbstractHttpData.size` are still be modified. In other words, it may break the failure atomicity here.
Modification:
Just move up the size check.
Result:
Keep the failure atomicity even if `AbstractHttpData.checkSize` fails.
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