POST 请求响应 400

Question

我正在尝试在我的应用中发送 POST 请求。但是服务器响应 400。我尝试使用来自 string varient 和 json varient 的解决方案。这两种情况我都会收到错误代码 400，但如果我通过邮递员发送相同的请求，它会响应 200，并且可以正常工作。使用“http”的服务器 API，我为它设置了 plist 属性。

func requestSmsCode() {

    let postUrl = URL(string: "http://www.myServer.com/auth/send_phone")

    var request = URLRequest(url: postUrl!)
    request.httpMethod = "POST"
    let postString = "phone=myPhone"
    request.httpBody = postString.data(using: .utf8)
    let task = URLSession.shared.dataTask(with: request) { data, response, error in
        guard let data = data, error == nil else {
            print("error=\(error)")
            return
        }

        if let httpStatus = response as? HTTPURLResponse, httpStatus.statusCode != 200 {
            print("statusCode should be 200, but is \(httpStatus.statusCode)")
            print("response = \(response)")
        }

        let responseString = String(data: data, encoding: .utf8)
        print("responseString = \(responseString)")
    }
    task.resume()
}


func requestSmsCodeWithJSON() {


    let json: [String: Any] = ["phone": "myPhone"]

    let jsonData = try? JSONSerialization.data(withJSONObject: json)

    let url = URL(string: "http://www.myServer.com/auth/send_phone")!
    var request = URLRequest(url: url)
    request.httpMethod = "POST"

    request.httpBody = jsonData

    let task = URLSession.shared.dataTask(with: request) { data, response, error in
        guard let data = data, error == nil else {
            print(error?.localizedDescription ?? "No data")
            return
        }

        if let httpStatus = response as? HTTPURLResponse, httpStatus.statusCode != 200 {
            print("statusCode should be 200, but is \(httpStatus.statusCode)")
            print("response = \(response)")
        }

        let responseJSON = try? JSONSerialization.jsonObject(with: data, options: [])
        if let responseJSON = responseJSON as? [String: Any] {
            print(responseJSON)
        }
    }

    task.resume()
}

Answer 1

我建议您使用像https://www.charlesproxy.com/ 这样的调试代理服务来查看请求是如何发出的。然后你可以再次向邮递员提出请求并比较它们以找出它们的不同之处。