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Wraps the handler as Express middleware, for a server that speaks Express rather than fetch.

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Parameters

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handler

TappifyFetchHandler

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Returns

ExpressMiddleware

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Remarks

It builds the url from originalUrl and the host header, forwards every header, and takes the body from request.body when a parser has already read it or from the stream when none has. A request with neither — a parser that consumed the stream without leaving a body — fails with a TapServerError carrying TAP_BODY_INVALID rather than calling your handler against an empty body, so mount express.json() before this middleware or mount this one first. A TapServerError is written as the handler’s own JSON error; anything else goes to next, so your own error middleware sees it.

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Example