How to get results from an CGI request with Swift

Question

Created Dec ’20

Replies 2

Boosts 0

Views 1.2k

Participants 2

Hi,

i have some issues to get the values result of a CGI request GET from a camera device.

actually in safari when I paste the local link to my camera with this http request :

://X.X.X.X/cgi-bin/modelreqcgi?action=get

I get this result in safari :
version=1.1.8;model=cbv4pro;

so now I want to get the result and theses fields with her values, but unfortunately with my URL request I never see the values.
please see below my code :

Code Block language
struct ResponseScan: Decodable {
    let versionScan: String
    let modelScan: String
}

Code Block languageimport UIKit
class ViewController: UIViewController {
    
    @IBOutlet weak var messageLabel: UILabel!
    
    @IBOutlet weak var UpdateProgress: UIProgressView!
    
    @IBOutlet weak var Radar: UIButton!
    
    @IBOutlet var UpdateProgressCollection: [UIProgressView]!
    
    
    //:: Action sur le bouton Scan :://
    @IBAction func RadarScan(_ sender: Any) {
    
        let urlScanType = "http://192.168.2.1/cgi-bin/model_req_cgi?action=get"
        
        if let urlScan = URL (string: urlScanType)
        {
            
       var requestScan = URLRequest (url: urlScan)
            requestScan.httpMethod = "GET"
            
        URLSession.shared.dataTask(with: requestScan) { data, response, error in
            if let data = data {
                print("value de data -> \(String.data)")
                print("value de response -> \(response)")
                do{
                    //let jsonData = data.data(using: .utf8)!
                let decoder = JSONDecoder ()
                    let jsonData:  ResponseScan = try decoder.decode(ResponseScan.self, from: data)
                print("Version -> \(jsonData.versionScan)")
                print("Modèle -> \(jsonData.modelScan)")
                }
                catch{}
            }
        }.resume()
        print("Finish !!!!!!!!")
        
    }
}

is there anybody who can help me please ??

best regards

Boost

Answer 1

OOPer OP

Dec ’20

First of all, the response version=1.1.8;model=cbv4pro; is not in JSON format.
So, Decodable or JSONDecoder would not work, and you may need to decode it by yourself.

Assuming you get non-nil data in your dataTask, you may need to write something like this:

Code Block     if let data = data {
        print("value de response -> \(response)")
        guard let responseText = String(data: data, encoding: .utf8) else {
            print("Unknown encoding")
            return
        }
        print("responseText -> \(responseText)")
        var version: String?
        var model: String?
        let regex = try! NSRegularExpression(pattern: #"([a-z]+)=([^;]+);"#, options: [])
        for match in regex.matches(in: responseText, range: NSRange(0..<responseText.utf16.count)) {
            let keyRange = Range(match.range(at: 1), in: responseText)!
            let valueRange = Range(match.range(at: 2), in: responseText)!
            let key = responseText[keyRange]
            let value = String(responseText[valueRange])
            print(key, value)
            if key == "version" {
                version = value
            } else if key == "model" {
                model = value
            }
        }
        let responseScan = ResponseScan(versionScan: version ?? "?", modelScan: model ?? "?")
        print("Version -> \(responseScan.versionScan)")
        print("Modèle -> \(responseScan.modelScan)")
    } else {
        print("`data` is nil")
    }

Please replace your line 27...39 with the code above.

0

Answer 2

CAMBOX44 OP

Dec ’20

Hi !
many thanks for your help and support, it's working, fantastic !

have a good day !!

best regards

0