


How to establish long term pipe connection between go and c# console application
php小编新一为您介绍如何在Go和C#控制台应用程序之间建立长期管道连接。在开发跨平台应用程序时,Go和C#是两种常用的编程语言。建立管道连接可以实现两种语言之间的通信和数据交换。本文将介绍如何使用Go和C#的相关库和API来建立稳定、可靠的长期管道连接,以便实现数据的传输和交互。无论您是Go开发者还是C#开发者,通过本文的指导,您都可以轻松地在两种语言之间建立管道连接,实现应用程序的功能需求。
问题内容
我有非常简单的 C# 控制台应用程序。这将是一个添加从 go 部分传递的 double
变量的过程。
double sum = 0; bool flag = true; while(flag) { // exit on convert error var str = Console.ReadLine(); // ask string double addend; flag = double.TryParse(str, out addend); // convert to double sum += flag ? addend : 0; //add on success Console.WriteLine(sum); } return 0;
我的 go 部分也很简单。它使用以前的控制台应用程序创建进程,向其发送字符串并读回结果。
package main import ( "fmt" "io" "log" "os/exec" ) func main() { cmd := exec.Command("%path to app%\\ConsoleApp.exe") // process that will be started stdout, err := cmd.StdoutPipe() // use std out pipe if err != nil { log.Fatal(err) } stdin, err := cmd.StdinPipe() // use std in pipe if err != nil { log.Fatal(err) } if err := cmd.Start(); err != nil { // start log.Fatal(err) } for true { var w1 string _, err := fmt.Scanln(&w1) // read line if err != nil { log.Fatal() } go func() { io.WriteString(stdin, w1) // pass it to console app }() read, err := io.ReadAll(stdout) // read result fmt.Println(read) if err != nil { log.Fatal() } } }
我开始调试控制台应用程序的进程(它出现在任务管理器、RMC - 调试中),但存在符号错误,所以我什至无法理解我的应用程序是否获取了字符串。
这只是我的麻烦的一半。我认为我的控制台应用程序有一两次收到字符串(我的意思是以前的时间),但只有第一个,导致管道在传输/复制后关闭。那么我该如何控制呢?我想要执行多个事务、写入和读取,并仅在需要时关闭管道。
编辑:我对 ConsoleApp 做了一些更改。现在看起来像这样:
double sum = 0; bool flag = true; while(flag) { var str = Console.ReadLine(); double addend; flag = double.TryParse(str, out addend); // File creation will indicate that message was recieved. using(StreamWriter writer = new StreamWriter("t.txt")) { writer.WriteLine($"{flag}"); } sum += flag ? addend : 0; Console.WriteLine(sum); } return 0;
解决方法
所以,@maxm 非常接近(或者甚至已经找到了解决方案,但它对我不起作用,fsr)。
执行部分:
package main import ( "bufio" "fmt" "log" "os/exec" ) func main() { cmd := exec.Command("%path to the exe%") stdout, err := cmd.StdoutPipe() if err != nil { log.Fatal(err) } stderr, err := cmd.StderrPipe() if err != nil { log.Fatal(err) } scanner := bufio.NewScanner(stdout) stdin, err := cmd.StdinPipe() if err != nil { log.Fatal(err) } if err := cmd.Start(); err != nil { log.Fatal(err) } for { var w1 string _, err := fmt.Scanln(&w1) w2 := []byte(w1) // important! You need convert string to byte array if err != nil { log.Fatal() } if _, err := stdin.Write(w2); err != nil { // pass byte array log.Fatal(stderr) panic(err) } if scanner.Scan() { read := scanner.Text() fmt.Println(read) } else { if err := scanner.Err(); err != nil { panic(err) } } } }
C# 部分非常简单。首先,您需要从字节数组恢复字符串:
public static string ByteArrayToString(this byte[] byteArray, int size) { // get decoder to decode input encoding var decoder = Console.InputEncoding.GetDecoder(); // count char that will be restored int charCount = decoder.GetCharCount(byteArray, 0, size); // initialize char array char[] charArray = new char[charCount]; // restore to char array decoder.GetChars(byteArray, 0, size, charArray, 0); // get and return string from our char array return new string(charArray); }
接下来是主要部分:
double sum = 0; bool flag = true; while(flag) { string str; using Stream stdin = Console.OpenStandardInput(); // for reading byte[] buffer = new byte[2048]; int bytes = 0; // bytes count while((bytes = stdin.Read(buffer, 0, buffer.Length)) > 0) { // read str = buffer.ByteArrayToString(bytes); // restore string flag = double.TryParse(str, out double addend); sum += flag ? addend : 0; Console.WriteLine(sum); //write if(!flag) break; } } return 0;
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