【发布时间】：2018-07-21 02:45:25
【问题描述】：
我想向我的 php 7 服务器发送一个 POST 请求，该服务器接受数据为 application/x-www-form-urlencoded。我拥有的数据在 Struct 中，我想在提交时获取该结构的每个属性作为参数。
这是处理我的 urlSession 请求 GET 和 POST 的结构
XHR.swift
struct XHR {
enum Result<T> {
case success(T)
case failure(Error)
}
func urlSession<T>(method: String? = nil, file: String, data: Data? = nil, completionHandler: @escaping (Result<T>) -> Void) where T: Codable {
let file = file.addingPercentEncoding(withAllowedCharacters: CharacterSet.urlQueryAllowed)!
// Set up the URL request
guard let url = URL.init(string: file) else {
print("Error: cannot create URL")
return
}
var urlRequest = URLRequest(url: url)
if method == "POST" {
urlRequest.httpMethod = "POST";
urlRequest.addValue("application/x-www-form-urlencoded", forHTTPHeaderField: "Content-Type")
urlRequest.httpBody = data
print(urlRequest.httpBody)
}
// set up the session
let config = URLSessionConfiguration.default
let session = URLSession(configuration: config)
// vs let session = URLSession.shared
// make the request
let task = session.dataTask(with: urlRequest, completionHandler: {
(data, response, error) in
DispatchQueue.main.async { // Correct
guard let responseData = data else {
print("Error: did not receive data")
return
}
let decoder = JSONDecoder()
print(String(data: responseData, encoding: .utf8))
do {
let todo = try decoder.decode(T.self, from: responseData)
completionHandler(.success(todo))
} catch {
print("error trying to convert data to JSON")
//print(error)
completionHandler(.failure(error))
}
}
})
task.resume()
}
}
这是向服务器发送 POST 请求的函数：
VideoViewModel.swift
struct User: Codable {
let username: String
let password: String
static func archive(w:User) -> Data {
var fw = w
return Data(bytes: &fw, count: MemoryLayout<User>.stride)
}
static func unarchive(d:Data) -> User {
guard d.count == MemoryLayout<User>.stride else {
fatalError("BOOM!")
}
var w:User?
d.withUnsafeBytes({(bytes: UnsafePointer<User>)->Void in
w = UnsafePointer<User>(bytes).pointee
})
return w!
}
}
enum Login {
case success(User)
case failure(Error)
}
func login(username: String, password: String, completionHandler: @escaping (Login) -> Void) {
let thing = User(username: username, password: password)
let dataThing = User.archive(w: thing)
xhr.urlSession(method: "POST", file: "https://kida.al/login_register/", data: dataThing) { (result: XHR.Result<User>) in
switch result {
case .failure(let error):
completionHandler(.failure(error))
case .success(let user):
//let convertedThing = User.unarchive(d: user)
completionHandler(.success(user))
}
}
}
我这样称呼它：
videoViewModel.login(username: "rexhin", password: "bonbon") { (result: VideoViewModel.Login) in
switch result {
case .failure(let error):
print("error")
case .success(let user):
print(user)
}
}
从 PHP 我可以看到 POST 请求已成功提交，但是当我尝试通过执行 $_POST["username"] 获取 username 字段时，我得到 Undefined index:
应用程序的完整代码可以在这里看到https://gitlab.com/rexhin/ios-kida.git
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