User-Agent changes to use my product name

Is that project using macros for those strings in Build Settings ~ Info.plist, or are they hardcoded?

However, I find that sometimes the user-agent appears to be in the format as

Are you saying that you literally see a dollars sign (

$

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—
Quinn “The Eskimo!”
Apple Developer Relations, Developer Technical Support, Core OS/Hardware

let myEmail = "eskimo" + "1" + "@apple.com"

Sorry for the confusion. What I see is the name of the value for "Product Name", but what I want to see is what I set via code. For example, say my product was named "Ews Editor", but I wanted my User-Agent to be "HttpSampleClient". What I see when this happens is Ews Editor/1 CFNetwork/976 Darwin/18.20.0 instead of what I expect it to be (since I set the Session Configuration to use a specific User-Agent) HttpClientSample/1 CFNetwork/976 Darwin/18.20.0

Now this is sort of a contrived example, but it's what I'm seeing.

Now why this matters, is because I should be able to progammaticaly control what the User-Agent is when the HTTP requests are made.

Thanks for the clarification.

Are you sure that the problematic request was from a task created in your session? It’s very easy to accidentally reference

URLSession.shared

self.defaultSession

How reproducible is this?

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Quinn “The Eskimo!”
Apple Developer Relations, Developer Technical Support, Core OS/Hardware

let myEmail = "eskimo" + "1" + "@apple.com"

Hi,

I'm not referencing URLSession.shared. I have posted the code I'm using in the original thread. I can reproduce it on demand.

Thanks,
Dave

I can reproduce it on demand.

But earlier you wrote:

However, I find that sometimes the user-agent appears to be in the format

Does that mean that you can reproduce the problem eventually, but you might have to run the program a bunch of times? If not, please clarify.

Also, under what circumstances are you reproducing this?

I have posted the code I'm using in the original thread.

In order to set a baseline, I took your code and put it into a new test project. I then fleshed it out to actually run a request. Here’s the resulting property and method on my view controller.

var session: URLSession!

func start() {
    if self.session == nil {
        let config = URLSessionConfiguration.default
        config.requestCachePolicy = .reloadIgnoringLocalCacheData
        config.httpAdditionalHeaders = ["User-Agent": "HelloCruelWorld"]
        self.session = URLSession(configuration: config, delegate: nil, delegateQueue: .main)
    }
    NSLog("task start")
    let url = URL(string: "http://127.0.0.1:12345")!
    let request = URLRequest(url: url, cachePolicy: .reloadIgnoringLocalCacheData, timeoutInterval: 60.0)
    self.session.dataTask(with: request) { (data, response, error) in
        if let error = error as NSError? {
            NSLog("task transport error %@ / %d", error.domain, error.code)
            return
        }
        let response = response as! HTTPURLResponse
        let data = data!
        NSLog("task finished with status %d, bytes %d", response.statusCode, data.count)
    }.resume()
}

I then started a dummy server in Terminal:

$ nc -l 12345

Next I ran my code in the iOS 12.1 simulator from Xcode 10.1, and here’s the request I get:

GET / HTTP/1.1
Host: 127.0.0.1:12345
Accept: */*
Accept-Language: en-us
Connection: keep-alive
Accept-Encoding: gzip, deflate
User-Agent: HelloCruelWorld

So putting a user agent in

httpAdditionalHeaders

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—
Quinn “The Eskimo!”
Apple Developer Relations, Developer Technical Support, Core OS/Hardware

let myEmail = "eskimo" + "1" + "@apple.com"

Hi Eskimo,

Thanks for your help here! I was able to identify that the "errant" User-Agent was coming out of a library that I depended on. It was spinning up a new defaultSession and that was leading to the problem.

Thanks for your help,
Dave