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In Express.js I used to have this kind of code:
app.use((req, res, next) => { res.header('Access-Control-Allow-Origin', '*'); res.header('Access-Control-Allow-Headers', 'Origin, X-Requested-With, Content-Type, Accept'); res.header('Access-Control-Allow-Methods', 'POST, GET, PUT, DELETE, OPTIONS'); next(); }); How do I do the same thing with Koa.js? I need to preset these several http headers for each server response.
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setHeader(name, value) (Added in v0. 4.0) method is an inbuilt application programming interface of the 'http' module which sets a single header value for implicit headers. If this header already exists in the to-be-sent headers, its value will be replaced.
setHeader. Sets a response header with the given name and value. If the header had already been set, the new value overwrites the previous one. The containsHeader method can be used to test for the presence of a header before setting its value.
Koa is a new web framework designed by the team behind Express, which aims to be a smaller, more expressive, and more robust foundation for web applications and APIs. By leveraging async functions, Koa allows you to ditch callbacks and greatly increase error-handling.
Finaly I found how to do it.
app.use(async (ctx, next) => { ctx.set('Access-Control-Allow-Origin', '*'); ctx.set('Access-Control-Allow-Headers', 'Origin, X-Requested-With, Content-Type, Accept'); ctx.set('Access-Control-Allow-Methods', 'POST, GET, PUT, DELETE, OPTIONS'); await next(); }); If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
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