《Swift入門》ubuntu下編譯執行Swift開發的Web後端示例
阿新 • • 發佈：2018-12-25
這裡只是演示如何在ubuntu下編譯執行Swift開發的Web後端專案。
專案程式碼來自Bluemix上提供的示例程式碼，如果你有賬號，可以去自己的空間下載，沒有的話，可以通過下面的地址下載：
http://download.csdn.net/detail/testcs_dn/9513395
環境配置好之後，將下載的示例程式碼解壓出來：
主要程式碼是“main.swift”，內容如下：
可通過以下命令編譯並啟動服務：/** * Copyright IBM Corporation 2016 * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. **/ /** * Creates a simple HTTP server that listens for incoming connections on port 9080. * For each request receieved, the server simply sends a simple hello world message * back to the client. **/ #if os(Linux) import Glibc #else import Darwin #endif import Utils import Foundation // Create server socket let address = parseAddress() let server_sockfd = createSocket(address) // Listen on socket with queue of 5 listen(server_sockfd, 5) var active_fd_set = fd_set() print("Server is listening on port: \(address.port)\n") // Initialize the set of active sockets fdSet(server_sockfd, set: &active_fd_set) let FD_SETSIZE = Int32(1024) // Generate HTTP response // Get environment variables let environmentVars = NSProcessInfo.processInfo().environment var responseBody = "<html><body>Hello from Swift on Linux!" + "<br />" + "<br />" + "<table border=\"1\">" + "<tr><th>Env Variable</th><th>Value</th></tr>" for (variable, value) in environmentVars { responseBody += "<tr><td>\(variable)</td><td>\(value)</td></tr>\n" } responseBody += "</table></body></html>" let httpResponse = "HTTP/1.0 200 OK\n" + "Content-Type: text/html\n" + "Content-Length: \(responseBody.length) \n\n" + responseBody var clientname = sockaddr_in() while true { // Block until input arrives on one or more active sockets var read_fd_set = active_fd_set; select(FD_SETSIZE, &read_fd_set, nil, nil, nil) // Service all the sockets with input pending for i in 0..<FD_SETSIZE { if fdIsSet(i,set: &read_fd_set) { if i == server_sockfd { // Connection request on original socket var size = sizeof(sockaddr_in) // Accept request and assign socket withUnsafeMutablePointers(&clientname, &size) { up1, up2 in var client_sockfd = accept(server_sockfd, UnsafeMutablePointer(up1), UnsafeMutablePointer(up2)) print("Received connection request from client: " + String(inet_ntoa (clientname.sin_addr)) + ", port " + String(UInt16(clientname.sin_port).bigEndian)) fdSet(client_sockfd, set: &active_fd_set) } } else { // Send HTTP response back to client write(i, httpResponse, httpResponse.characters.count) // Close client socket close(i) fdClr(i, set: &active_fd_set) } } } }
[email protected]:/home/aven/swifttrans# swift build
[email protected]:/home/aven/swifttrans# .build/debug/Server
Server is listening on port: 9080編譯時，可能會出現以下錯誤：
服務啟動成功後，我們就可以通過瀏覽器訪問了，結果如下圖：
