headary - summarize HTTP headers

headary is a trivial Node package that provides a normalized summary of basic HTTP status codes and headers. You might use headary to write control flow for redirects and 304s in a uniform way. This can make sense if you handle responses at multiple locations in your code.

Example

const headary = require('headary')
 
// Get HTTP response `res` from somewhere.
 
const h = headary(res)
if (h.ok) {
  // Move on.
} else {
  if (h.message) {
    // Quaint or unhandled HTTP status.
    const er = new Error(h.message)
    this.emit('error', er)
  } else if (h.url) {
    // Issue request with new URL.
    if (h.permanent) {
      // Update some cache or whatever.
    }
  } else if (h.permanent) {
    // `410: Gone`, update cache.
  } else {
    // `304: Not Modified`, done.
  }
}

Types

Headers

• message String Optional information.
• ok Boolean This flag is true if no further actions are required.
• permanent Boolean If the resource has been moved permanently, this is true.
• url String If the resource has been moved, this is its new location.

Exports

headary exports a single function that returns a new Headers object.

headary(res)

• res http.IncomingMessage A HTTP response.

Creates Headers from a HTTP response.

The considered HTTP status codes:

• 200 OK
• 300 Multiple Choices
• 301 Moved Permanently
• 302 Found
• 303 See Other
• 304 Not Modified
• 305 Use Proxy
• 307 Temporary Redirect
• 410 Gone

Install

With npm do:

$ npm install headary

License

MIT License