我正在尝试从 NSURLConnection 转移到 NSURLSession 以获取 SOAP 帖子，但 NSURLSessionDataDelegate 似乎有问题。
这是 NSURLConnection 中的旧代码，它运行良好:
let soapMessage = "<?xml version='1.0' encoding='UTF-8'?><SOAP-ENV:Envelope xmlns:SOAP-ENV='http://schemas.xmlsoap.org/soap/envelope/' xmlns:ns1='http://tempuri.org/'><SOAP-ENV:Body><ns1:get_Countries/></SOAP-ENV:Body></SOAP-ENV:Envelope>"
print("Soap Packet is \(soapMessage)")
let urlString = "https://example.com/Service.svc"
let url = NSURL(string: urlString)
let theRequest = NSMutableURLRequest(URL: url!)
let msgLength = String(soapMessage.characters.count)
theRequest.addValue("text/xml; charset=utf-8", forHTTPHeaderField: "Content-Type")
theRequest.addValue(msgLength, forHTTPHeaderField: "Content-Length")
theRequest.addValue("http://tempuri.org/IService/get_Countries", forHTTPHeaderField: "SoapAction")
theRequest.HTTPMethod = "POST"
theRequest.HTTPBody = soapMessage.dataUsingEncoding(NSUTF8StringEncoding, allowLossyConversion: false)
print("Request is \(theRequest.allHTTPHeaderFields!)")
let connection = NSURLConnection(request: theRequest, delegate: self, startImmediately: false)
connection?.start()
此代码然后使用 NSURLConnectionDelegate，并按如下方式正常工作:
func connection(connection: NSURLConnection!, didReceiveResponse response: NSURLResponse!) {
MutableData.length = 0;
let httpresponse = response as? NSHTTPURLResponse
print("status \(httpresponse?.statusCode)")
//print("headers \(httpresponse?.allHeaderFields)")
}
func connection(connection: NSURLConnection!, didReceiveData data: NSData!) {
MutableData.appendData(data)
}
func connection(connection: NSURLConnection, didFailWithError error: NSError) {
NSLog("Error with Soap call: %@", error)
}
func connectionDidFinishLoading(connection: NSURLConnection!) {
let xmlParser = NSXMLParser(data: MutableData)
xmlParser.delegate = self
xmlParser.parse()
xmlParser.shouldResolveExternalEntities = true
}
func connection(connection: NSURLConnection, willSendRequestForAuthenticationChallenge challenge: NSURLAuthenticationChallenge) {
if challenge.protectionSpace.authenticationMethod == NSURLAuthenticationMethodServerTrust && challenge.protectionSpace.host == "example.com" {
NSLog("yep")
let credential = NSURLCredential(trust: challenge.protectionSpace.serverTrust!)
challenge.sender!.useCredential(credential, forAuthenticationChallenge: challenge)
} else {
NSLog("nope")
challenge.sender!.performDefaultHandlingForAuthenticationChallenge!(challenge)
}
}
因此，该代码一切正常，仅供引用，以便您了解我过去所做的工作，以及 API 确实有效的事实!但是，如果我改为使用 NSURLSession 和 NSURLSessionDataDelegate，那么我将无法使其正常工作。
新代码如下:
let soapMessage = "<?xml version='1.0' encoding='UTF-8'?><SOAP-ENV:Envelope xmlns:SOAP-ENV='http://schemas.xmlsoap.org/soap/envelope/' xmlns:ns1='http://tempuri.org/'><SOAP-ENV:Body><ns1:get_Countries/></SOAP-ENV:Body></SOAP-ENV:Envelope>"
print("Soap Packet is \(soapMessage)")
let urlString = "https://example.com/Service.svc"
let url = NSURL(string: urlString)
let theRequest = NSMutableURLRequest(URL: url!)
let msgLength = String(soapMessage.characters.count)
theRequest.addValue("text/xml; charset=utf-8", forHTTPHeaderField: "Content-Type")
theRequest.addValue(msgLength, forHTTPHeaderField: "Content-Length")
theRequest.addValue("http://tempuri.org/IService/get_Countries", forHTTPHeaderField: "SoapAction")
theRequest.HTTPMethod = "POST"
theRequest.HTTPBody = soapMessage.dataUsingEncoding(NSUTF8StringEncoding, allowLossyConversion: false)
print("Request is \(theRequest.allHTTPHeaderFields!)")
let config = NSURLSessionConfiguration.defaultSessionConfiguration()
let session = NSURLSession(configuration:config, delegate: self, delegateQueue: NSOperationQueue.mainQueue())
let task = session.dataTaskWithRequest(theRequest)
task.resume()
我使用的代表是 NSURLSessionDelegate、NSURLSessionDataDelegate:
func URLSession(session: NSURLSession, didReceiveChallenge challenge: NSURLAuthenticationChallenge, completionHandler: (NSURLSessionAuthChallengeDisposition, NSURLCredential?) -> Void) {
print("Am in NSURLSessionDelegate didReceiveChallenge")
if challenge.protectionSpace.authenticationMethod == NSURLAuthenticationMethodServerTrust && challenge.protectionSpace.host == "example.com" {
NSLog("yep authorised")
let credential = NSURLCredential(trust: challenge.protectionSpace.serverTrust!)
challenge.sender!.useCredential(credential, forAuthenticationChallenge: challenge)
} else {
NSLog("nope")
challenge.sender!.performDefaultHandlingForAuthenticationChallenge!(challenge)
}
}
func URLSessionDidFinishEventsForBackgroundURLSession(session: NSURLSession) {
print("Am in URLSessionDidFinishEventsForBackgroundURLSession")
let xmlParser = NSXMLParser(data: MutableData)
xmlParser.delegate = self
xmlParser.parse()
xmlParser.shouldResolveExternalEntities = true
}
func URLSession(session: NSURLSession, didBecomeInvalidWithError error: NSError?) {
print("error of \(error)")
}
func URLSession(session: NSURLSession, dataTask: NSURLSessionDataTask, didReceiveResponse response: NSURLResponse, completionHandler: (NSURLSessionResponseDisposition) -> Void) {
print("Am in didReceiveResponse")
MutableData.length = 0
}
func URLSession(session: NSURLSession, dataTask: NSURLSessionDataTask, didReceiveData data: NSData) {
print("Am in didReceiveData")
MutableData.appendData(data)
}
func URLSession(session: NSURLSession, task: NSURLSessionTask, didCompleteWithError error: NSError?) {
print("error of \(error)")
}
因此，当我运行代码时，我得到输出:
“我在 NSURLSessionDelegate didReceiveChallenge 中” “是的授权”
所以它可以正常执行 didReceiveChallenge，并且它似乎可以正常授权 HTTPS 安全证书，但是之后没有任何进一步的 react ，它没有做任何其他事情，我希望它进入 didReceiveResponse，然后进入 didReceiveData，但什么也没有进一步发生。
所以我被卡住了，我当然可以继续使用 NSURLConnection，因为它一切正常，但我想了解 NSURLSession，特别是我哪里出错了。因此，如果有人可以提供帮助，那就太好了。
谢谢
最佳答案
如果其他人遇到同样的问题，我已将其解决。问题是我没有在 didReceiveChallenge 和 didReceiveResponse 委托(delegate)中使用 completionHandler
关于swift - 在 Swift 中为 SOAP POST 从 NSURLConnection 迁移到 NSURLSession，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/32863584/