Question

i had some difficulties in programming and the meaning of the Request Body is confused. It always returns 400 response codes.Please help me.

 String baseURL="https://sb-ssl.google.com/safebrowsing/api/lookup";

 String arguments = "";
 arguments+=URLEncoder.encode("client", "UTF-8")+"="+URLEncoder.encode("demo-app", "UTF-8")+"&";
 arguments+=URLEncoder.encode("apikey", "UTF-8")+"="+URLEncoder.encode("apikey", "UTF-8")+"&";
 arguments+=URLEncoder.encode("appver", "UTF-8")+"="+URLEncoder.encode("1.5.2", "UTF-8")+"&";
 arguments+=URLEncoder.encode("pver", "UTF-8")+"="+URLEncoder.encode("3.0", "UTF-8")+"&";
 arguments+=URLEncoder.encode("post_req_body", "UTF-8")+"="+URLEncoder.encode("2\nhttp://www.google.com\nhttp://www.facebook.com", "UTF-8");

 String query = arguments;

    System.out.println("Sending POST request - " + query);
// Construct the url object representing cgi script
    URL url = new URL( baseURL );

    // Get a URLConnection object, to write to POST method
    URLConnection connect = url.openConnection();

    // Specify connection settings
    connect.setDoInput(true);
    connect.setDoOutput(true);

// Get an output stream for writing
    OutputStream output = connect.getOutputStream();


    PrintStream pout = new PrintStream (output);

    pout.print ( query );
    pout.close();

Answer 1

Your request is wrong. If you use a POST request, then the parameters client, apikey, apiver and pver should be part of the URL.

The request body should only consist of the URLs to check (plus the number of URLS on the first line).

So it could look like this:

String baseURL="https://sb-ssl.google.com/safebrowsing/api/lookup";

String arguments = "";
arguments + =URLEncoder.encode("client", "UTF-8") + "=" + URLEncoder.encode("myapp", "UTF-8") + "&";
arguments + =URLEncoder.encode("apikey", "UTF-8") + "=" + URLEncoder.encode("12341234", "UTF-8") + "&";
arguments + =URLEncoder.encode("appver", "UTF-8") + "=" + URLEncoder.encode("1.5.2", "UTF-8") + "&";
arguments + =URLEncoder.encode("pver", "UTF-8") + "=" + URLEncoder.encode("3.0", "UTF-8");

// Construct the url object representing cgi script
URL url = new URL(baseURL + "?" + arguments);

// Get a URLConnection object, to write to POST method
URLConnection connect = url.openConnection();

// Specify connection settings
connect.setDoInput(true);
connect.setDoOutput(true);

// Get an output stream for writing
OutputStream output = connect.getOutputStream();
PrintStream pout = new PrintStream (output);
pout.print("2");
pout.println();
pout.print("http://www.google.com");
pout.println();
pout.print("http://www.facebook.com");
pout.close();