Java.io.IOException：错误= 2，在Java中执行curl时没有此类文件或目录

Question

I'm using curl for certificate-based/x509 authentication `

String command = "curl --cert " +certificateFilePath+" --key "+ certificateKeyFilePath+" --insecure "+authUrl;

          ProcessBuilder process = new ProcessBuilder(command); 
            Process p;
            try
            {
                p = process.start();
                 BufferedReader reader =  new BufferedReader(new InputStreamReader(p.getInputStream()));
                    StringBuilder builder = new StringBuilder();
                    String line = null;
                    while ( (line = reader.readLine()) != null) {
                            builder.append(line);
                            builder.append(System.getProperty("line.separator"));
                    }
                    String result = builder.toString();
                    System.out.print("result ------------------:  "+result);

            }catch(Exception e){
                e.printStackTrace();
            }

`

but getting exception `

Caused by: java.io.IOException: error=2, No such file or directory
        at java.lang.UNIXProcess.forkAndExec(Native Method)
        at java.lang.UNIXProcess.<init>(UNIXProcess.java:247)
        at java.lang.ProcessImpl.start(ProcessImpl.java:134)
        at java.lang.ProcessBuilder.start(ProcessBuilder.java:1029)

`

given that the application and auth service are running inside docker-container on Ubuntu and works fine when I manually go inside the application docker-container and execute the above curl command. Please help

Answer 1

From process builder docs:

https://docs.oracle.com/javase/7/docs/api/java/lang/ProcessBuilder.html

The proper way to do it is to call it with the parameters passed as separate strings otherwise it won't work. Also in order to run system commands like curl in linux or dir in windows you need to call the command interpreter - sh for linux. So your command should become something like:

ProcessBuilder process = new ProcessBuilder("sh", "-c","curl","--cert", certificationPath......); 

Or you can try:

Runtime.getRuntime().exec(command);  //Here you pass the whole command as a string  

Answer 2

您是否可以尝试在root用户下或使用sudo java运行JVM。...它可能没有足够的JVM权限。