如何在我的iOS应用程序中使用Alamofire发送带有简单字符串的POST请求？
作为默认设置，Alamofire需要请求参数：
Alamofire.request(.POST, "http://mywebsite.example/post-request", parameters: ["foo": "bar"])
这些参数包含键值对。但我不想在HTTP主体中发送键值字符串。
我的意思是这样的：
Alamofire.request(.POST, "http://mywebsite.example/post-request", body: "myBodyString")
你的示例 Alamofire.request(.POST, "http://mywebsite.example/post-request", parameters: ["foo": "bar"]) 已经将字符串 "foo=bar" 作为请求体。
但如果你真的想要自定义格式的字符串，可以这样做：
Alamofire.request(.POST, "http://mywebsite.example/post-request", parameters: [:], encoding: .Custom({
(convertible, params) in
var mutableRequest = convertible.URLRequest.copy() as NSMutableURLRequest
mutableRequest.HTTPBody = "myBodyString".dataUsingEncoding(NSUTF8StringEncoding, allowLossyConversion: false)
return (mutableRequest, nil)
}))
注意：parameters不应该为nil
更新（Alamofire 4.0，Swift 3.0）：
在Alamofire 4.0中，API已经改变。因此对于自定义编码，我们需要一个遵守ParameterEncoding协议的值/对象。
extension String: ParameterEncoding {
public func encode(_ urlRequest: URLRequestConvertible, with parameters: Parameters?) throws -> URLRequest {
var request = try urlRequest.asURLRequest()
request.httpBody = data(using: .utf8, allowLossyConversion: false)
return request
}
}
Alamofire.request("http://mywebsite.example/post-request", method: .post, parameters: [:], encoding: "myBody", headers: [:])
您可以这样做：
在httpBody中放入数据
var request = URLRequest(url: URL(string: url)!)
request.httpMethod = HTTPMethod.post.rawValue
request.setValue("application/json", forHTTPHeaderField: "Content-Type")
let pjson = attendences.toJSONString(prettyPrint: false)
let data = (pjson?.data(using: .utf8))! as Data
request.httpBody = data
Alamofire.request(request).responseJSON { (response) in
print(response)
}
如果你使用Alamofire，只需将encoding类型设置为URLEncoding.httpBody即可。
这样，即使在代码中定义为json，你也可以将数据作为字符串发送到httpbody。
对我来说有效。
Bad Filali的问题更新：
var url = "http://..."
let _headers : HTTPHeaders = ["Content-Type":"application/x-www-form-urlencoded"]
let params : Parameters = ["grant_type":"password","username":"mail","password":"pass"]
let url = NSURL(string:"url" as String)
request(url, method: .post, parameters: params, encoding: URLEncoding.httpBody, headers: _headers).responseJSON(
completionHandler: { response in response
let jsonResponse = response.result.value as! NSDictionary
if jsonResponse["access_token"] != nil
{
access_token = String(describing: jsonResponse["accesstoken"]!)
}
})
我修改了 @Silmaril 的答案，扩展了 Alamofire 的 Manager。 这个解决方案使用 EVReflection 直接序列化一个对象：
//Extend Alamofire so it can do POSTs with a JSON body from passed object
extension Alamofire.Manager {
public class func request(
method: Alamofire.Method,
_ URLString: URLStringConvertible,
bodyObject: EVObject)
-> Request
{
return Manager.sharedInstance.request(
method,
URLString,
parameters: [:],
encoding: .Custom({ (convertible, params) in
let mutableRequest = convertible.URLRequest.copy() as! NSMutableURLRequest
mutableRequest.HTTPBody = bodyObject.toJsonString().dataUsingEncoding(NSUTF8StringEncoding, allowLossyConversion: false)
return (mutableRequest, nil)
})
)
}
}
然后您可以像这样使用它：
Alamofire.Manager.request(.POST, endpointUrlString, bodyObject: myObjectToPost)
根据Illya Krit的答案
import Alamofire
struct BodyStringEncoding: ParameterEncoding {
private let body: String
init(body: String) { self.body = body }
func encode(_ urlRequest: URLRequestConvertible, with parameters: Parameters?) throws -> URLRequest {
guard var urlRequest = urlRequest.urlRequest else { throw Errors.emptyURLRequest }
guard let data = body.data(using: .utf8) else { throw Errors.encodingProblem }
urlRequest.httpBody = data
return urlRequest
}
}
extension BodyStringEncoding {
enum Errors: Error {
case emptyURLRequest
case encodingProblem
}
}
extension BodyStringEncoding.Errors: LocalizedError {
var errorDescription: String? {
switch self {
case .emptyURLRequest: return "Empty url request"
case .encodingProblem: return "Encoding problem"
}
}
}
Alamofire.request(url, method: .post, parameters: nil, encoding: BodyStringEncoding(body: text), headers: headers).responseJSON { response in
print(response)
}
return Alamofire.request(.POST, "http://mywebsite.com/post-request" , parameters: [:], encoding: .Custom({
(convertible, params) in
let mutableRequest = convertible.URLRequest.copy() as! NSMutableURLRequest
let data = ("myBodyString" as NSString).dataUsingEncoding(NSUTF8StringEncoding)
mutableRequest.HTTPBody = data
return (mutableRequest, nil)
}))
我已经为字符串数组完成了这项任务。这个解决方案是为正文中的字符串调整过的。
从 Alamofire 4 开始，这是一种“原生”的方法：
struct JSONStringArrayEncoding: ParameterEncoding {
private let myString: String
init(string: String) {
self.myString = string
}
func encode(_ urlRequest: URLRequestConvertible, with parameters: Parameters?) throws -> URLRequest {
var urlRequest = urlRequest.urlRequest
let data = myString.data(using: .utf8)!
if urlRequest?.value(forHTTPHeaderField: "Content-Type") == nil {
urlRequest?.setValue("application/json", forHTTPHeaderField: "Content-Type")
}
urlRequest?.httpBody = data
return urlRequest!
}
}
然后使用以下方式发出请求：
Alamofire.request("your url string", method: .post, parameters: [:], encoding: JSONStringArrayEncoding.init(string: "My string for body"), headers: [:])
我参考了@afrodev的答案。在我的情况下，我将参数作为字符串传递给我的函数，这个字符串需要在请求中发送。所以，这是代码：
func defineOriginalLanguage(ofText: String) {
let text = ofText
let stringURL = basicURL + "identify?version=2018-05-01"
let url = URL(string: stringURL)
var request = URLRequest(url: url!)
request.httpMethod = HTTPMethod.post.rawValue
request.setValue("text/plain", forHTTPHeaderField: "Content-Type")
request.httpBody = text.data(using: .utf8)
Alamofire.request(request)
.responseJSON { response in
print(response)
}
}
let parameters = ["foo": "bar"]
// All three of these calls are equivalent
AF.request("https://httpbin.org/post", method: .post, parameters: parameters)
AF.request("https://httpbin.org/post", method: .post, parameters: parameters, encoder: URLEncodedFormParameterEncoder.default)
AF.request("https://httpbin.org/post", method: .post, parameters: parameters, encoder: URLEncodedFormParameterEncoder(destination: .httpBody))
func paramsFromJSON(json: String) -> [String : AnyObject]?
{
let objectData: NSData = (json.dataUsingEncoding(NSUTF8StringEncoding))!
var jsonDict: [ String : AnyObject]!
do {
jsonDict = try NSJSONSerialization.JSONObjectWithData(objectData, options: .MutableContainers) as! [ String : AnyObject]
return jsonDict
} catch {
print("JSON serialization failed: \(error)")
return nil
}
}
let json = Mapper().toJSONString(loginJSON, prettyPrint: false)
Alamofire.request(.POST, url + "/login", parameters: paramsFromJSON(json!), encoding: .JSON)