Coerce request properties according to an openapi parameter list.
* Effortlessly coerce header, path, query and formData request properties to defined types in
an openapi parameters list.
* Handles array types.
* Performant.
* Extensively tested.
* Small footprint.
* Supports _collectionFormat_ for _formData array_ parameters.
See ./test/data-driven/*.js for more examples.
``javascript
import OpenapiRequestCoercer from 'openapi-request-coercer';
const coercer = new OpenapiRequestCoercer({
parameters: [
{
in: 'query',
type: 'integer',
name: 'foo',
required: true
}
]
});
const request = {
query: {
foo: '5'
}
};
coercer.coerce(request);
console.log(request.query.foo); //=> 5
`
By default a boolean parameter is coerced to:
* _false_ if the input value is "false"
* _true_ for any other input value
This behaviour makes sense if you do not wish to validate the input fields.
If the opposite is the case, the behaviour can be changed by setting the "x-openapi-coercion-strict" to _true_ on the parameter in question as illustrated below.
`javascript`
import OpenapiRequestCoercer from 'openapi-request-coercer';
const coercer = new OpenapiRequestCoercer({
parameters: [
{
in: 'query',
type: 'boolean',
name: 'foo',
required: true,
"x-openapi-coercion-strict": true
}
]
});
Doing so will result in the boolean parameter being coerced to:
* _false_ if the input value is "false" (in any casing)
* _true_ if the input value is "true" (in any casing)
* _null_ for any other input value
Would x-openapi-coercion-strict not be strict enough to your test, or would you completely want to customize the coercion behavior you can completely define how simpler types (boolean, integer and number) are dealt with.
In order to do so, define a custom coercion strategy through the optional coercionStrategy argument.
For instance, below a sample of a strategy that will:
- only coerce stringified boolean values when they are expressed in lowercase in a case sentive way
- coerce integers when they are even, otherwise return null
- as numbers aren't overridden, the default strategy will be leveraged
`javascript
import OpenapiRequestCoercer from 'openapi-request-coercer';
const coercionStrategy = {
boolean = (input) => {
if (typeof input === 'boolean') {
return input;
}
if (input === 'false') {
return false;
}
else if (input === 'true') {
return true;
}
return input;
};
number = (input) => {
var result = Number(input);
return isNaN(result) || (result%2) === 1 ? null : result;
}
};
const parameters = { / ... / }
const sut = new OpenapiRequestCoercer({ parameters, coercionStrategy });
const result = sut.coerce(request);
`
.#### args.loggingKey
Defaults to
''.#### args.parameters
An array of openapi parameters.
#### args.coercionStrategy
An object exposing the optional
boolean, integer, number properties. Each of them, when defined is expected to accept a function accepting a parameter and returning a result.LICENSE
````
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