CODEWITHSUNDEEP
iosswifthttp-headersnsurlsessionalamofire
kevindeleon
kevindeleon

Reputation: 1924

How to globally set custom headers in Swift app?

So I have an app that makes frequent requests to various endpoints on our API, and every request pretty much has the same custom headers sent with it. I'd like to know if there is a way to globally set custom header using NSURLSessionConfiguration, and if so...what is the syntax in Swift and where would I put it? AppDelegate? I've done some searching and can't seem to find a good example of this. Is it a bad practice? Not doable?

EDIT:

I'm using Alamofire for request/response, so I need something that sets them globally so that that library (and others that happen to use NSURLSession) will send the headers along by default.

Upvotes: 0

Views: 1468

Answers (1)

cnoon
cnoon

Reputation: 16643

We have this documented right in the README.

var defaultHeaders = Alamofire.Manager.sharedInstance.session.configuration.HTTPAdditionalHeaders ?? [:]
defaultHeaders["DNT"] = "1 (Do Not Track Enabled)"

let configuration = NSURLSessionConfiguration.defaultSessionConfiguration()
configuration.HTTPAdditionalHeaders = defaultHeaders

let manager = Alamofire.Manager(configuration: configuration)

Then you need to use the new manager instead of the global Alamofire singleton.

manager.request(.GET, "https://httpbin.org/get")
       .responseJSON { _, _, result in
           debugPrint(result)
       }

This will attach the DNT header to every request that is sent through this manager instance.

Each Manager instance has its own internal NSURLSession which also has its own configuration. Therefore, this override only works for this Manager instance. If you need these headers on a different Manager instance, you'll have to set it up the same way.

Upvotes: 2

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