org.argeo.cms/src/org/argeo/cms/http/server/HttpServerUtils.java

   1 package org.argeo.cms.http.server;
   2
   3 import java.net.URI;
   4 import java.util.Objects;
   5
   6 import com.sun.net.httpserver.HttpContext;
   7 import com.sun.net.httpserver.HttpExchange;
   8
   9 /** HTTP utilities on the server-side. */
  10 public class HttpServerUtils {
  11         private final static String SLASH = "/";
  12
  13         private static String extractPathWithingContext(HttpContext httpContext, String fullPath, boolean startWithSlash) {
  14                 Objects.requireNonNull(fullPath);
  15                 String contextPath = httpContext.getPath();
  16                 if (!fullPath.startsWith(contextPath))
  17                         throw new IllegalArgumentException(fullPath + " does not belong to context" + contextPath);
  18                 String path = fullPath.substring(contextPath.length());
  19                 // TODO optimise?
  20                 if (!startWithSlash && path.startsWith(SLASH)) {
  21                         path = path.substring(1);
  22                 } else if (startWithSlash && !path.startsWith(SLASH)) {
  23                         path = SLASH + path;
  24                 }
  25                 return path;
  26         }
  27
  28         /** Path within the context, NOT starting with a slash. */
  29         public static String relativize(HttpExchange exchange) {
  30                 URI uri = exchange.getRequestURI();
  31                 HttpContext httpContext = exchange.getHttpContext();
  32                 return extractPathWithingContext(httpContext, uri.getPath(), false);
  33         }
  34
  35         /** Path within the context, starting with a slash. */
  36         public static String subPath(HttpExchange exchange) {
  37                 URI uri = exchange.getRequestURI();
  38                 HttpContext httpContext = exchange.getHttpContext();
  39                 return extractPathWithingContext(httpContext, uri.getPath(), true);
  40         }
  41
  42         /** singleton */
  43         private HttpServerUtils() {
  44
  45         }
  46 }