88 lines
3.7 KiB
Swift
88 lines
3.7 KiB
Swift
// Copyright © 2022 Rangeproof Pty Ltd. All rights reserved.
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import Foundation
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import PromiseKit
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import SessionSnodeKit
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import SessionUtilitiesKit
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@objc(SNFileServerAPI)
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public final class FileServerAPI: NSObject {
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// MARK: - Settings
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@objc public static let oldServer = "http://88.99.175.227"
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public static let oldServerPublicKey = "7cb31905b55cd5580c686911debf672577b3fb0bff81df4ce2d5c4cb3a7aaa69"
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@objc public static let server = "http://filev2.getsession.org"
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public static let serverPublicKey = "da21e1d886c6fbaea313f75298bd64aab03a97ce985b46bb2dad9f2089c8ee59"
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public static let maxFileSize = 10_000_000 // 10 MB
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/// The file server has a file size limit of `maxFileSize`, which the Service Nodes try to enforce as well. However, the limit applied by the Service Nodes
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/// is on the **HTTP request** and not the actual file size. Because the file server expects the file data to be base 64 encoded, the size of the HTTP
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/// request for a given file will be at least `ceil(n / 3) * 4` bytes, where n is the file size in bytes. This is the minimum size because there might also
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/// be other parameters in the request. On average the multiplier appears to be about 1.5, so when checking whether the file will exceed the file size limit when
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/// uploading a file we just divide the size of the file by this number. The alternative would be to actually check the size of the HTTP request but that's only
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/// possible after proof of work has been calculated and the onion request encryption has happened, which takes several seconds.
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public static let fileSizeORMultiplier: Double = 2
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// MARK: - File Storage
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public static func upload(_ file: Data) -> Promise<FileUploadResponse> {
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let request = Request(
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method: .post,
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server: server,
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endpoint: Endpoint.file,
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headers: [
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.contentDisposition: "attachment",
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.contentType: "application/octet-stream"
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],
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body: Array(file)
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)
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return send(request, serverPublicKey: serverPublicKey)
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.decoded(as: FileUploadResponse.self, on: .global(qos: .userInitiated))
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}
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public static func download(_ fileId: String, useOldServer: Bool) -> Promise<Data> {
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let serverPublicKey: String = (useOldServer ? oldServerPublicKey : serverPublicKey)
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let request = Request<NoBody, Endpoint>(
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server: (useOldServer ? oldServer : server),
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endpoint: .fileIndividual(fileId: fileId)
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)
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return send(request, serverPublicKey: serverPublicKey)
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}
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public static func getVersion(_ platform: String) -> Promise<String> {
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let request = Request<NoBody, Endpoint>(
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server: server,
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endpoint: .sessionVersion,
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queryParameters: [
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.platform: platform
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]
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)
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return send(request, serverPublicKey: serverPublicKey)
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.decoded(as: VersionResponse.self, on: .global(qos: .userInitiated))
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.map { response in response.version }
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}
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// MARK: - Convenience
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private static func send<T: Encodable>(_ request: Request<T, Endpoint>, serverPublicKey: String) -> Promise<Data> {
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let urlRequest: URLRequest
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do {
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urlRequest = try request.generateUrlRequest()
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}
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catch {
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return Promise(error: error)
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}
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return OnionRequestAPI.sendOnionRequest(urlRequest, to: request.server, with: serverPublicKey)
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.map2 { _, response in
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guard let response: Data = response else { throw HTTP.Error.parsingFailed }
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return response
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}
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}
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}
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