用变量在Java中卷曲POST请求

Question

so I have this snip of code where I am trying to validate an xml with a certain schema using a previous web app that was developed. On the website it gave a curl command and I did some research on trying to execute it in java with no avail. I found an api called httpclient but couldn't find anything for POST

Second half of the question; if this is the correct format then it must be how I presented the xml variable in the curl command.

@POST
@Path("/Validate")
//Uncomment when testing with real xml
//@Produces("application/xml")
public String validate(@FormParam("xml") String xml)
{
    System.out.println(xml);
    System.out.println("validate");
    try {
        Process process = Runtime.getRuntime().exec( "curl -X POST --data-    urlencode 'xml=<hml>xml</hml>' http://miring.b12x.org/validator/ValidateMiring/ ");
        BufferedReader input = new BufferedReader(new     InputStreamReader(process.getInputStream()));
        String cmdXML="";
        String line=null;
        while((line=input.readLine())!=null)
        {
            cmdXML+=line;
        }
    } catch (IOException e) {
        logger.error("Something went wrong in validating "+ e);
        System.out.println("Error in validation");
    }
    return "stuff";
}

Answer 1

First, runtime.exec(...) requires a String[] when your command has more than one element.

Java API Runtime : http://docs.oracle.com/javase/7/docs/api/java/lang/Runtime.html#exec(java.lang.String[])

Second, you must ensure that command works on your side :

curl -X POST --data-urlencode 'xml=<hml>xml</hml>' http://miring.b12x.org/validator/ValidateMiring/

Finally, you must indicate the full path of the command curl .

Example : /usr/bin/curl on Unix or C:/Program Files/Curl/curl on Windows

Be careful

On the code below, you have to replace <PATH_TO_CURL> by the actual path of the command curl

Can you try this code ?

Code

@POST
@Path("/Validate")
//Uncomment when testing with real xml
//@Produces("application/xml")
public String validate(@FormParam("xml") String xml)
{
    System.out.println(xml);
    System.out.println("validate");
    try {
        Runtime runtime = Runtime.getRuntime();
        String[] command = {"<PATH_TO_CURL>/curl", "-X", "POST", "--data-urlencode", "'xml=<hml>xml</hml>'", " http://miring.b12x.org/validator/ValidateMiring/"}
        Process process = runtime.exec(command);
        BufferedReader input = new BufferedReader(new InputStreamReader(process.getInputStream()));
        String cmdXML="";
        String line=null;
        while((line=input.readLine())!=null)
        {
            cmdXML+=line;
        }
    } catch (IOException e) {
        logger.error("Something went wrong in validating "+ e);
        System.out.println("Error in validation");
    }
    return "stuff";
}