Swift 4将POST请求发送为x-www-form-urlencoded [英] Swift 4 send POST request as x-www-form-urlencoded
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内部,我想在提交该结构时获取此结构的每个属性作为参数.
I want to send a POST request to my php 7 server which accepts data as application/x-www-form-urlencoded
. The data I have is inside a Struct and I want to get every property of this struct as a parameter when I submit it.
这是处理我的urlSession请求GET和POST的结构
XHR.swift
This is the struct which handles my urlSession requests both GET and POST
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()
}
}
这是将POST请求发送到服务器的功能:
VideoViewModel.swift
This is the functions which sends a POST request to the server:
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可以看到POST请求已成功提交,但是当我尝试通过执行$_POST["username"]
来获取username
字段时,我得到了Undefined index:
From PHP I can see that a POST request is submitted successfully but when I try to get the username
field by doing $_POST["username"]
I get Undefined index:
可以在此处查看该应用的完整代码 https://gitlab.com/rexhin/ios-kida.git
Full code of the app can be seen here https://gitlab.com/rexhin/ios-kida.git
推荐答案
您正在传递User.archive(w: thing)
的结果作为嵌入在请求正文中的data
,这可能永远无法工作.通常,您的archive(w:)
和unarchive(d:)
永远不会产生任何有用的结果,您最好立即删除它们.
You are passing the result of User.archive(w: thing)
as the data
embedded in the request body, which may never work. Generally, your archive(w:)
and unarchive(d:)
would never generate any useful results and you should better remove them immediately.
如果要在需要x-www-form-urlencoded
的地方传递参数,则需要创建类似URL查询的字符串.
If you want to pass parameters where x-www-form-urlencoded
is needed, you need to create a URL-query-like string.
尝试这样的事情:
func login(username: String, password: String, completionHandler: @escaping (Login) -> Void) {
let dataThing = "username=\(username)&password=\(password)".data(using: .utf8)
xhr.urlSession(method: "POST", file: "https://kida.al/login_register/", data: dataThing) { (result: XHR.Result<User>) in
//...
}
}
上面的示例有点过于简化,您可能需要先将username
和/或password
转义,然后才能将它们嵌入字符串中,因为它们可以包含一些特殊字符.您可以在网络上找到许多有关它的文章.
The example above is a little bit too simplified, that you may need to escape username
and/or password
before embedding it in a string, when they can contain some special characters. You can find many articles on the web about it.
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