Question 209536 in IOS Swift Question posted in
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Ios swift – Parse Bool response using Alamofire

I have old code from team where they were failing to parse Bool response.

NetworkManager.shared().executeWith(request: APIRouter.firebasetoken(param)) { (httpResponse, jsonData, error) in
    if httpResponse?.statusCode == 200 {
        guard let json = jsonData else {return}
        if let isSuccess = json.bool, isSuccess == true{
           print("Success to send fcm token")
        }
        
    }else{
        print("failed to send fcm token", error?.localizedDescription)
    }
}

The issue I am facing here is that the response is strictly coming as bool either true or false as attached image of postman.

enter image description here

I am getting success code 200, but jsonData is always nil.
So please help me to parse the Bool response.

I can’t change the code, as they have base class for all these, so only change I have to apply is in this method only.

Any help will be appreciated.

Tags:

2

Answers


  1. 0

    Alright, I cannot make a concrete-accurate guess with this limited information but, it seems like the response might be malformed. Which I mean by saying malformed is that, there could be an issue with the way the server is generating the response.

    You mentioned that the response code is 200 which is cool, but jsonData is nil which is bad, and the response is a boolean which is weird. With the limited information you provided, my best guess is that the response is not a JSON object.

    In order to handle this situation (if thats the case), you can handle the plain text response by updating your code:

    NetworkManager.shared().executeWith(request: APIRouter.firebasetoken(param)) { (httpResponse, jsonData, error) in
    if httpResponse?.statusCode == 200 {
        if let responseText = jsonData?.stringValue {
            if responseText == "true" {
                print("Success to send fcm token")
            } else {
                print("Failed to send fcm token")
            }
        } else {
            print("Invalid response format")
        }
    } else {
        print("Failed to send fcm token", error?.localizedDescription)
    }
}

    You can also check if the server is setting the Content-Type header correctly. It should be set to application/json to indicate that the response is in JSON format. But I don’t have the best knowledge on that.

    We can understand your issue with additional information. Please correct me if I got your problem wrong. Hope we can solve it.

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  2. 0

    Without knowing how you get jsonData in (httpResponse, jsonData, error), it’s hard to tell what’s wrong.

    But, if we use let data = Data("true".utf8), having a only a boolean as JSON is valid, a little strange (ie uncommon), but valid JSON.
    But to be able to parse it, we need to add some options to JSONSerialization.

    let value = try JSONSerialization.jsonObject(with: data) //Fails
let value = try JSONSerialization.jsonObject(with: data, options: .fragmentsAllowed) //Success

    You need to use .fragmentsAllowed that should allow String, Number, Bool as top level and not only Array/Dictionary (ie "list" or "objects").

    You can also directly use Codable:

    let value = try JSONDecoder().decode(Bool.self, from: data) //Success

    Seeing .stringValue, .bool I suspect you use SwiftyJSON (or assimilated), I strongly suggest to use Codable if possible.

    Side note, in the encoding (and so maybe in the decoding at some point), there could be limitation due to iOS versions, see related question

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