Java似乎无法从WinAPI继承匿名管道,我正在使用自己的库,无法弄清楚问题是什么。
当前提交的库源。
阴离子测试:
package net.gudenau.lib.pipes.test;
import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.nio.charset.StandardCharsets;
import net.gudenau.lib.pipes.AnonymousPipeHandle;
import net.gudenau.lib.pipes.PipeHandle;
import net.gudenau.lib.pipes.Pipes;
public class AnonymousPipe{
public static void main(String[] args){
try(PipeHandle client = Pipes.findPipe()){
InputStream inputStream = client.getInputStream();
OutputStream outputStream = client.getOutputStream();
byte[] data = "This is from the anon pipe!".getBytes(StandardCharsets.UTF_16);
outputStream.write(data.length);
outputStream.write(data);
data = new byte[inputStream.read()];
inputStream.read(data);
System.out.printf("Server says: %sn", new String(data, StandardCharsets.UTF_16));
}catch(IOException e){
e.printStackTrace();
System.exit(0);
}
}
static void test(){
File path = new File(System.getProperty("java.home") + File.separator + "bin");
File executable;
if(System.getProperty("os.name").toLowerCase().contains("windows")){
executable = new File(path, "javaw.exe");
}else{
executable = new File(path, "java");
}
ProcessBuilder processBuilder = new ProcessBuilder(
executable.getAbsolutePath(),
"-Dfile.encoding=UTF-8",
"-classpath",
System.getProperty("java.class.path"),
"net.gudenau.lib.pipes.test.AnonymousPipe"
);
processBuilder.inheritIO();
try(AnonymousPipeHandle pipe = Pipes.createPipe()){
pipe.setupHandleShare(processBuilder);
Process process = processBuilder.start();
pipe.clientConnected();
InputStream inputStream = pipe.getInputStream();
OutputStream outputStream = pipe.getOutputStream();
byte[] data = new byte[inputStream.read()];
inputStream.read(data);
String message = new String(data, StandardCharsets.UTF_16);
System.out.printf("Client says: %sn", new String(data, StandardCharsets.UTF_16));
data = message.toUpperCase().getBytes(StandardCharsets.UTF_16);
outputStream.write(data.length);
outputStream.write(data);
try{
process.waitFor();
}catch(InterruptedException ignored){}
}catch(IOException e){
e.printStackTrace();
System.exit(-1);
}
}
}
据我所知,我正确地完成了所有这些工作。
我正在使用bInheritHandle
设置为 true 的SECURITY_ATTRIBUTES
创建带有 CreatePipe
的阴离子管道。
然后在创建客户端后,我关闭"客户端"端句柄。
我错过了什么?
编辑:我间隔并错过了错误。 test
方法抛出The specified procedure could not be found.
,至少根据 Windows 这对我来说毫无意义。
另一个进程抛出The handle is invalid.
,再次根据Windows。
输出:
Client says: the quick brown fox jumps over the lazy dog
Server says: THE QUICK BROWN FOX JUMPS OVER THE LAZY DOG
java.io.IOException: The specified procedure could not be found.
at net.gudenau.lib.pipes.impl.windows.WindowsPipeInputStream.read(WindowsPipeInputStream.java:34)
at java.base/java.io.InputStream.read(InputStream.java:106)
at net.gudenau.lib.pipes.impl.windows.WindowsPipeInputStream.read(WindowsPipeInputStream.java:16)
at net.gudenau.lib.pipes.test.AnonymousPipe.test(AnonymousPipe.java:57)
at net.gudenau.lib.pipes.test.PipeTest.main(PipeTest.java:6)
java.io.IOException: The handle is invalid.
at net.gudenau.lib.pipes.impl.windows.WindowsPipeOutputStream.write(WindowsPipeOutputStream.java:35)
at java.base/java.io.OutputStream.write(OutputStream.java:77)
at net.gudenau.lib.pipes.impl.windows.WindowsPipeOutputStream.write(WindowsPipeOutputStream.java:15)
at net.gudenau.lib.pipes.test.AnonymousPipe.main(AnonymousPipe.java:19)
Process finished with exit code -1
我记得在这里读到一个进程的句柄在另一个进程中无效,Java 窗口匿名管道仅在线程之间工作。 这可以解释无效的句柄。