express-set-headers-mw

express-headers-setter

Middleware to set response headers in express app

This middleware will help you to set up response headers in 3 different way.

1. Static Headers (Value is fixed while configuring this Middleware)
2. Dynamically calculated headers (Value is calculated dynamically)
3. Copying value from response object

Configuring middleware

Middleware can be configured using following method which accepts IConfig parameter

createSetHeadersMiddleware(config:IConfig)

This method will return configured middleware function that sets headers on the response based on configurations.

IConfig

This is interface for configuration parameters

interface IConfig {
    staticHeaders?: IStaticValues;
    dynamicHeaders?: IDynamicValues;
    copyFromRequestHeaders?: string[];
}

• staticHeaders : This param is of type IStaticValues and can be used to configure header with static values.
• dynamicHeaders : This param is of type IDynamicValues and can be used to configure headers with dynamic values.
• copyFromRequestHeaders : This parameter is array of string and values from request headers will be copied to response headers.

IStaticValues

interface IStaticValues {
    [key: string]: string;
}

key is header key and value will be header value.. plain and simple.

IDynamicValues

interface IDynamicValues {
    [key: string]: (arg0: Request) => string;
}

key is header key, value is of type function, it will evaluated and request object and return string value will be assigned to header key.

Usage/Example

Here

Happy codding

License