express.raw([options])
This is a built-in middleware function in Express. It parses incoming request
payloads into a Buffer and is based on
body-parser.
Returns middleware that parses all bodies as a Buffer and only looks at requests
where the Content-Type header matches the type option. This parser accepts
any Unicode encoding of the body and supports automatic inflation of gzip and
deflate encodings.
A new body Buffer containing the parsed data is populated on the request
object after the middleware (i.e. req.body), or undefined if
there was no body to parse, the Content-Type was not matched, or an error
occurred.
As `req.body`'s shape is based on user-controlled input, all properties and
values in this object are untrusted and should be validated before trusting.
For example, `req.body.toString()` may fail in multiple ways, for example
stacking multiple parsers `req.body` may be from a different parser. Testing
that `req.body` is a `Buffer` before calling buffer methods is recommended.
The following table describes the properties of the optional options object.
| Property | Description | Type | Default |
|---|---|---|---|
inflate | Enables or disables handling deflated (compressed) bodies; when disabled, deflated bodies are rejected. | Boolean | true |
limit | Controls the maximum request body size. If this is a number, then the value specifies the number of bytes; if it is a string, the value is passed to the bytes library for parsing. | Mixed | "100kb" |
type | This is used to determine what media type the middleware will parse. This option can be a string, array of strings, or a function. If not a function, type option is passed directly to the type-is library and this can be an extension name (like bin), a mime type (like application/octet-stream), or a mime type with a wildcard (like */* or application/*). If a function, the type option is called as fn(req) and the request is parsed if it returns a truthy value. | Mixed | "application/octet-stream" |
verify | This option, if supplied, is called as verify(req, res, buf, encoding), where buf is a Buffer of the raw request body and encoding is the encoding of the request. The parsing can be aborted by throwing an error. | Function | undefined |