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index.js
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index.js
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'use strict';
const joi = require('joi');
const requestParts = [
{
key: 'body',
value: function () { return this.request.body; },
cb: function ( err, value ) {
if ( err ) {
throw err;
}
this.request.body = value;
}
},
{
key: 'query',
value: function () { return this.request.query; },
cb: function ( err, value ) {
if ( err ) {
throw err;
}
this.request._querycache[this.request.querystring] = value;
}
},
{
key: 'params',
value: function () { return this.params; },
cb: function ( err, value ) {
if ( err ) {
throw err;
}
this.params = value;
}
},
{
key: 'headers',
value: function () { return this.request.headers; },
cb: function ( err, value ) {
if ( err ) {
throw err;
}
Object.assign(
this.request.headers,
value
);
}
},
];
module.exports = function( options ) {
const opts = Object.assign( {
failCode: 400
}, options );
return function* ( next ) {
const that = this;
try {
yield requestParts.map( part => {
if ( !opts[part.key] ) {
return Promise.resolve();
}
return Promise.resolve(
joi.validate(
part.value.call(that),
opts[part.key],
opts.options,
part.cb.bind(that)
)
);
});
} catch ( err ) {
if ( err.name === 'ValidationError' ) {
err.status = opts.failCode;
}
throw err;
}
yield next;
};
};