使用swift和API进行POST [英] POST with swift and API
本文介绍了使用swift和API进行POST的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
当我尝试向我的服务器上的API发送POST请求时遇到问题，我已经遵循了许多不同的教程，但它仍然无法正常工作。
我知道我的问题与POST请求有关但我无法解决！
所以这是我在Swift中的代码和我在php中的API :(是的，我已经用代码中的真实ID替换了xxxx）
To总结服务器接收请求，例如，如果我手动输入伪它工作，它真的是POST方法谁不工作..服务器没有收到POST参数
Swift代码：
var request = NSMutableURLRequest（URL：NSURL（字符串：http：// localhost：8888 /academy/test.php）！）
var session = NSURLSession.sharedSession（）
request.HTTPMethod =POST
var params = [pseudo： test] as Dictionary< String，String>
var err：NSError？
request.HTTPBody = NSJSONSerialization.dataWithJSONObject（params，options：nil，error：& err）
request.addValue（application / json，forHTTPHeaderField：Content-Type）
request.addValue（application / json，forHTTPHeaderField：Accept）
var task = session.dataTaskWithRequest（request，completionHandler：{data，response，error - > Void in
println（Response：\（response））
var strData = NSString（data：data，encoding：NSUTF8StringEncoding）
println（Body：\（strData））
var错误：NSError？
var json = NSJSONSerialization.JSONObjectWithData（data，options：.MutableLeaves，error：& err）as？NSDictionary
// JSONObjectWithData构造函数是否返回错误？所以，将错误记录到控制台
if（err！= nil）{
println（err！.localizedDescription）
let jsonStr = NSString（data：data，encoding：NSUTF8StringEncoding）
println（错误无法解析JSON：'\（jsonStr）'）
}
else {
// JSONObjectWithData构造函数未返回错误。但是，我们仍然应该
//检查并确保json具有使用可选绑定的值。
如果让parseJSON = json {
//好吧，解析的JSON就在这里，让我们从它获得'成功'的值
var success = parseJSON [success]为？ Int
println（成功：\（成功））
}
else {
// Woa，好吧，json对象是零，有些事情发生了。也许服务器没有运行？
let jsonStr = NSString（data：data，encoding：NSUTF8StringEncoding）
println（Error无法解析JSON：\（jsonStr））
}
}
}）
task.resume（）* /
PHP代码：
$ BDD_hote ='xxxxx';
$ BDD_bd ='xxxxx';
$ BDD_utilisateur ='xxxxx';
$ BDD_mot_passe ='xxxxx';
try {
$ bdd = new PDO（'mysql：host ='。$ BDD_hote。'; dbname ='。$ $ BDD_bd，$ BDD_utilisateur，$ BDD_mot_passe）;
$ bdd-> exec（SET CHARACTER SET utf8）;
$ bdd-> setAttribute（PDO :: ATTR_ERRMODE，PDO :: ERRMODE_WARNING）;
}
catch（PDOException $ e）{
echo'Erreur：'。$ e-> getMessage（）;
echo'N°：'。$ e-> getCode（）;
}
$ pseudo = addslashes（$ _ POST [pseudo]）;
$ req = $ bdd-> query（SELECT * from users WHERE pseudo ='$ pseudo'）;
$ resultArray = array（）;
$ donnees = $ req-> fetch（）;
echo json_encode（$ donnees）;
感谢提前：）
试试这个：
让myURL = NSURL（字符串：http：// localhost： 8888 /学院/ test.php的）！
let request = NSMutableURLRequest（URL：myURL）
request.HTTPMethod =POST
request.setValue（application / x-www-form-urlencoded，forHTTPHeaderField：Content-Type ）
request.setValue（application / json，forHTTPHeaderField：Accept）
let bodyStr：String =pseudo = test
request.HTTPBody = bodyStr.dataUsingEncoding（NSUTF8StringEncoding）
let task = NSURLSession.sharedSession（）。dataTaskWithRequest（request）{
data，response，error in
//你的完成处理程序代码在这里
}
task.resume（）
您必须使用UTF8字符串编码对数据进行编码。如果您需要为请求正文设置多个字段和值对，则可以更改正文字符串，例如pseudo = test& language = swift。实际上，我通常会为NSMutableURLRequest创建一个扩展，并添加一个方法，该方法将字典作为参数，并使用正确的编码将此地图（字典）的内容设置为HTTPBody。这可能对你有用：
extension NSMutableURLRequest {
func setBodyContent（contentMap：Dictionary< String，String>）{
var firstOneAdded = false
let contentKeys：Array< String> = array（contentMap.keys）
for contentKey in contentKeys {
if（！firstOneAdded）{
contentBodyAsString + = contentKey +=+ contentMap [contentKey]！
firstOneAdded = true
}
else {
contentBodyAsString + =& + contentKey +=+ contentMap [contentKey]！
}
}
contentBodyAsString = contentBodyAsString.stringByAddingPercentEscapesUsingEncoding（NSUTF8StringEncoding）！
self.HTTPBody = contentBodyAsString.dataUsingEncoding（NSUTF8StringEncoding）
}
}
您可以将其用作：
request.setBodyContent（params）
我希望这可以帮到你！
I've a problem when I try to send a POST request to my API on my server, I've followed many many different tutorials but it still doesn't work. I know than my problem is with the POST request but I can't solve it ! So this is my code in Swift and my API in php : (and yes I've replaced the xxxx by the real IDs in my code)
To sum up server receive the request and for example if I manually enter a pseudo it works, It's really the POST method who doesn't work.. The server doesn't receive the POST parameter
Swift code :
var request = NSMutableURLRequest(URL: NSURL(string: "http://localhost:8888/academy/test.php")!)
var session = NSURLSession.sharedSession()
request.HTTPMethod = "POST"
var params = ["pseudo":"test"] as Dictionary<String, String>
var err: NSError?
request.HTTPBody = NSJSONSerialization.dataWithJSONObject(params, options: nil, error: &err)
request.addValue("application/json", forHTTPHeaderField: "Content-Type")
request.addValue("application/json", forHTTPHeaderField: "Accept")
var task = session.dataTaskWithRequest(request, completionHandler: {data, response, error -> Void in
println("Response: \(response)")
var strData = NSString(data: data, encoding: NSUTF8StringEncoding)
println("Body: \(strData)")
var err: NSError?
var json = NSJSONSerialization.JSONObjectWithData(data, options: .MutableLeaves, error: &err) as? NSDictionary
// Did the JSONObjectWithData constructor return an error? If so, log the error to the console
if(err != nil) {
println(err!.localizedDescription)
let jsonStr = NSString(data: data, encoding: NSUTF8StringEncoding)
println("Error could not parse JSON: '\(jsonStr)'")
}
else {
// The JSONObjectWithData constructor didn't return an error. But, we should still
// check and make sure that json has a value using optional binding.
if let parseJSON = json {
// Okay, the parsedJSON is here, let's get the value for 'success' out of it
var success = parseJSON["success"] as? Int
println("Succes: \(success)")
}
else {
// Woa, okay the json object was nil, something went worng. Maybe the server isn't running?
let jsonStr = NSString(data: data, encoding: NSUTF8StringEncoding)
println("Error could not parse JSON: \(jsonStr)")
}
}
})
task.resume()*/
PHP Code :
$BDD_hote = 'xxxxx';
$BDD_bd = 'xxxxx';
$BDD_utilisateur = 'xxxxx';
$BDD_mot_passe = 'xxxxx';
try{
$bdd = new PDO('mysql:host='.$BDD_hote.';dbname='.$BDD_bd, $BDD_utilisateur, $BDD_mot_passe);
$bdd->exec("SET CHARACTER SET utf8");
$bdd->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_WARNING);
}
catch(PDOException $e){
echo 'Erreur : '.$e->getMessage();
echo 'N° : '.$e->getCode();
}
$pseudo = addslashes($_POST["pseudo"]);
$req = $bdd->query("SELECT * from users WHERE pseudo='$pseudo'");
$resultArray = array();
$donnees = $req->fetch();
echo json_encode($donnees);
Thanks by advance :)
解决方案
Try this:
let myURL = NSURL(string: "http://localhost:8888/academy/test.php")!
let request = NSMutableURLRequest(URL: myURL)
request.HTTPMethod = "POST"
request.setValue("application/x-www-form-urlencoded", forHTTPHeaderField: "Content-Type")
request.setValue("application/json", forHTTPHeaderField: "Accept")
let bodyStr:String = "pseudo=test"
request.HTTPBody = bodyStr.dataUsingEncoding(NSUTF8StringEncoding)
let task = NSURLSession.sharedSession().dataTaskWithRequest(request) {
data, response, error in
// Your completion handler code here
}
task.resume()
You have to encode your data using UTF8 string encoding. If you need to set more than one field&value pairs for request body, you can change the body string, for example, "pseudo=test&language=swift". In fact, I usually create an extension for NSMutableURLRequest and add a method which takes a dictionary as parameter and sets the content of this map(dictionary) as HTTPBody using correct encoding. This may work for you:
extension NSMutableURLRequest {
func setBodyContent(contentMap: Dictionary<String, String>) {
var firstOneAdded = false
let contentKeys:Array<String> = Array(contentMap.keys)
for contentKey in contentKeys {
if(!firstOneAdded) {
contentBodyAsString += contentKey + "=" + contentMap[contentKey]!
firstOneAdded = true
}
else {
contentBodyAsString += "&" + contentKey + "=" + contentMap[contentKey]!
}
}
contentBodyAsString = contentBodyAsString.stringByAddingPercentEscapesUsingEncoding(NSUTF8StringEncoding)!
self.HTTPBody = contentBodyAsString.dataUsingEncoding(NSUTF8StringEncoding)
}
}
And you can use this as:
request.setBodyContent(params)
I hope this helps you!
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