use full match instead of strings.HasPrefix

[tuhao1020]

#176

gofiber/fiber#1414

[chunhui-pang]

This patch fixed the problem definitely. However, it introduced another problem that recursive structs cannot be serialized. I think it may be better to check if there is a dot after the prefix

[tuhao1020]

@chunhui-pang Could you please provide more details about recursive structs serialization?

[ReneWerner87]

@chunhui-pang could you check the code

[stale]

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