NSURLSessionConfiguration HTTPAdditionalHeaders not set

Question

Authorization header is set in NSURLSessionConfiguration, however it is not attached to NSURLSessionDataTask. Is this a bug in Foundation framework?

NSURLSessionConfiguration *configuration = [NSURLSessionConfiguration defaultSessionConfiguration];
[configuration setHTTPAdditionalHeaders:@{@"Authorization":@"123"}];

// Initialize session with NSURLSessionConfiguration
NSURLSession *session = [NSURLSession sessionWithConfiguration:configuration];
NSMutableURLRequest *request = [[NSMutableURLRequest alloc] initWithURL:url];
NSURLSessionDataTask *sessionTask = [session dataTaskWithRequest:request
                                        completionHandler:^(NSData *data, NSURLResponse *response, NSError *error) {
}];

[sessionTask resume];

this works for me smoothly (on iOS 15) – Alex Cohn Dec 12 '21 at 14:07 — Alex Cohn, Dec 12 '21 at 14:07

Dongjin Suh · Answer 1 · 2016-11-07T06:37:47.913

5

In the NSURLSessionConfiguration document,

An NSURLSession object is designed to handle various aspects of the HTTP protocol for you. As a result, you should not modify the following headers:

Authorization

Connection

Host

WWW-Authenticate

edited Nov 07 '16 at 06:37

answered Mar 03 '16 at 03:04

Dongjin Suh

448
4
12

1

This doc still exists in 2021, but the instructions re: Authorization field seem to be irrelevant. – Alex Cohn Dec 12 '21 at 14:06

score 3 · Accepted Answer · answered Jul 15 '14 at 11:45

3

I try this in Swift and it works

    var sessionConfig = NSURLSessionConfiguration.defaultSessionConfiguration()
    var xHTTPAdditionalHeaders: [NSObject : AnyObject] = ["X-test":"taly"]
    sessionConfig.HTTPAdditionalHeaders = xHTTPAdditionalHeaders
    let session = NSURLSession(configuration: sessionConfig)

    let task = session.dataTaskWithURL(url, completionHandler: {data, response, error -> Void in

answered Jul 15 '14 at 11:45

Jakub Dubrovsky

70
2

1

Works for `X-test` but won't work for `Authorization`. See Dongjin Suh answer. – Błażej Dec 01 '16 at 12:32
1

`config.httpAdditionalHeaders = [ "authorization": "token abcd"]` works for me smoothly (iOS 15). – Alex Cohn Dec 12 '21 at 14:04

NSURLSessionConfiguration HTTPAdditionalHeaders not set

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