//
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// MultipartUpload.swift
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//
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// Copyright (c) 2014-2018 Alamofire Software Foundation (http://alamofire.org/)
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//
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// Permission is hereby granted, free of charge, to any person obtaining a copy
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// of this software and associated documentation files (the "Software"), to deal
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// in the Software without restriction, including without limitation the rights
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// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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// copies of the Software, and to permit persons to whom the Software is
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// furnished to do so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in
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// all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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// THE SOFTWARE.
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//
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import Foundation
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/// Internal type which encapsulates a `MultipartFormData` upload.
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final class MultipartUpload: @unchecked Sendable { // Must be @unchecked due to FileManager not being properly Sendable.
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private let _result = Protected<Result<UploadRequest.Uploadable, any Error>?>(nil)
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var result: Result<UploadRequest.Uploadable, any Error> {
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if let value = _result.read({ $0 }) {
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return value
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} else {
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let result = Result { try build() }
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_result.write(result)
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return result
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}
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}
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private let multipartFormData: Protected<MultipartFormData>
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let encodingMemoryThreshold: UInt64
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let request: any URLRequestConvertible
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let fileManager: FileManager
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init(encodingMemoryThreshold: UInt64,
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request: any URLRequestConvertible,
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multipartFormData: MultipartFormData) {
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self.encodingMemoryThreshold = encodingMemoryThreshold
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self.request = request
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fileManager = multipartFormData.fileManager
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self.multipartFormData = Protected(multipartFormData)
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}
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func build() throws -> UploadRequest.Uploadable {
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let uploadable: UploadRequest.Uploadable
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if multipartFormData.contentLength < encodingMemoryThreshold {
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let data = try multipartFormData.read { try $0.encode() }
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uploadable = .data(data)
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} else {
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let tempDirectoryURL = fileManager.temporaryDirectory
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let directoryURL = tempDirectoryURL.appendingPathComponent("org.alamofire.manager/multipart.form.data")
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let fileName = UUID().uuidString
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let fileURL = directoryURL.appendingPathComponent(fileName)
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try fileManager.createDirectory(at: directoryURL, withIntermediateDirectories: true, attributes: nil)
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do {
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try multipartFormData.read { try $0.writeEncodedData(to: fileURL) }
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} catch {
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// Cleanup after attempted write if it fails.
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try? fileManager.removeItem(at: fileURL)
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throw error
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}
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uploadable = .file(fileURL, shouldRemove: true)
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}
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return uploadable
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}
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}
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extension MultipartUpload: UploadConvertible {
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func asURLRequest() throws -> URLRequest {
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var urlRequest = try request.asURLRequest()
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multipartFormData.read { multipartFormData in
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urlRequest.headers.add(.contentType(multipartFormData.contentType))
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}
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return urlRequest
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}
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func createUploadable() throws -> UploadRequest.Uploadable {
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try result.get()
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}
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}
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