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weibo/Pods/Alamofire/Source/MultipartUpload.swift

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4 years ago
//
// MultipartUpload.swift
//
// Copyright (c) 2014-2018 Alamofire Software Foundation (http://alamofire.org/)
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.
//
import Foundation
/// Internal type which encapsulates a `MultipartFormData` upload.
final class MultipartUpload {
lazy var result = Result { try build() }
let isInBackgroundSession: Bool
let multipartFormData: MultipartFormData
let encodingMemoryThreshold: UInt64
let request: URLRequestConvertible
let fileManager: FileManager
init(isInBackgroundSession: Bool,
encodingMemoryThreshold: UInt64,
request: URLRequestConvertible,
multipartFormData: MultipartFormData) {
self.isInBackgroundSession = isInBackgroundSession
self.encodingMemoryThreshold = encodingMemoryThreshold
self.request = request
fileManager = multipartFormData.fileManager
self.multipartFormData = multipartFormData
}
func build() throws -> (request: URLRequest, uploadable: UploadRequest.Uploadable) {
var urlRequest = try request.asURLRequest()
urlRequest.setValue(multipartFormData.contentType, forHTTPHeaderField: "Content-Type")
let uploadable: UploadRequest.Uploadable
if multipartFormData.contentLength < encodingMemoryThreshold && !isInBackgroundSession {
let data = try multipartFormData.encode()
uploadable = .data(data)
} else {
let tempDirectoryURL = fileManager.temporaryDirectory
let directoryURL = tempDirectoryURL.appendingPathComponent("org.alamofire.manager/multipart.form.data")
let fileName = UUID().uuidString
let fileURL = directoryURL.appendingPathComponent(fileName)
try fileManager.createDirectory(at: directoryURL, withIntermediateDirectories: true, attributes: nil)
do {
try multipartFormData.writeEncodedData(to: fileURL)
} catch {
// Cleanup after attempted write if it fails.
try? fileManager.removeItem(at: fileURL)
}
uploadable = .file(fileURL, shouldRemove: true)
}
return (request: urlRequest, uploadable: uploadable)
}
}
extension MultipartUpload: UploadConvertible {
func asURLRequest() throws -> URLRequest {
try result.get().request
}
func createUploadable() throws -> UploadRequest.Uploadable {
try result.get().uploadable
}
}