并行 http 请求

Question

我需要将image发送到服务器并等待服务器响应。图片很大，需要很长时间，所以我想并行化。我尝试了很多方法，但出现错误：

2019-12-20 15：01：49.148156+0100 拍照[644：138111] 任务 <81527D6C-279F-4644-9F5A-DE00665BCBF2>.<18> 完成，但出现错误 [-1001] 错误域 = NSURLErrorDomain Code=-1001"请求超时。"UserInfo={_kCFStreamErrorCodeKey=-2102， NSUnderlyingError=0x282184240 {Error Domain=kCFErrorDomainCFNetwork Code=-1001 "(null(" UserInfo={_kCFStreamErrorCodeKey=-2102， _kCFStreamErrorDomainKey=4}}， _NSURLErrorFailingURLSessionTaskErrorKey=LocalUploadTask <81527D6C-279F-4644-9F5A-DE00665BCBF2>.<18>， _NSURLErrorRelatedURLSessionTaskErrorKey=( "本地上传任务<81527D6C-279F-4644-9F5A-DE00665BCBF2>.<18>" (，NSLocalizedDescription=请求超时。

exteriorQueinAsinc.async {
let queue = OperationQueue()
for i in 0..<images.count
{
queue.addOperation {
self.sendImageToServer(image: images[i], imageName: imageNames[i])
}
}
queue.waitUntilAllOperationsAreFinished()
}

发送图像功能：

func SendImageToServer(image:UIImage,imageName:String){
let userId = AppSettings.user.id
let token = AppSettings.token
let url = "http://intaiapi.catch-system.com/vehicle_image"
guard let imageData = image.jpegData(compressionQuality: 1.0) else { return }
let parametar : [String:String] = [
"apiUrl":apiUrl,
"userId":userId!,
"userToken":token,
]
let manager = Alamofire.SessionManager.default
manager.session.configuration.timeoutIntervalForRequest = 1200
manager.upload(multipartFormData: { multipleData in
for (key, value) in parametar {
multipleData.append(value.data(using: String.Encoding.utf8)!, withName: key)
}
multipleData.append(
imageData, withName: "image", fileName: "image.jpeg", mimeType: "image/jpeg")}, to: url) {
(result) in
switch result {
case .success(let upload, _, _):
upload.responseJSON { response in
if let image = UIImage(data: response.data!) {
handler(.success(image))
} else {
NotificationCenter.default.post(name: .ClearImageErrorNotification, object: nil)
handler(.failure(.NotValidStatusCode(response.debugDescription)))
}
}
case .failure(let encodingError):
NotificationCenter.default.post(name: .ClearImageErrorNotification, object: nil)
handler(.failure(.NotValidStatusCode(encodingError.localizedDescription)))
print(encodingError)
}
}
}

我尝试的方法之一是这种方法。我使用阿拉莫火。

Answer 1

您可以增加等待请求完成的超时时间。设置

manager.session.configuration.timeoutIntervalForResource = 1200

或附近的任何其他值

manager.session.configuration.timeoutIntervalForRequest = 1200