package org.deftserver.util;
import java.io.File;
import java.math.BigInteger;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
import org.deftserver.web.http.HttpRequest;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
public class HttpUtil {
private static final Logger logger = LoggerFactory.getLogger(HttpUtil.class);
/* MessageDigest are not thread-safe and are expensive to create.
* Do it lazily for each thread that need access to one.*/
private static final ThreadLocal<MessageDigest> md = new ThreadLocal<MessageDigest>();
private static final String _200_OK = "HTTP/1.1 200 OK\r\n";
private static final String _201_CREATED = "HTTP/1.1 201 Created\r\n";
private static final String _202_ACCEPTED = "HTTP/1.1 202 Accepted\r\n";
private static final String _203_NON_AUTHORITATIVE_INFO = "HTTP/1.1 203 Non-Authoritative Information\r\n";
private static final String _204_NO_CONTENT = "HTTP/1.1 204 No Content\r\n";
private static final String _205_RESET_CONTENT = "HTTP/1.1 205 Reset Content\r\n";
private static final String _206_PARTIAL_CONTENT = "HTTP/1.1 206 Partial Content\r\n";
private static final String _300_MULTIPLE_CHOICES = "HTTP/1.1 300 Multiple Choices\r\n";
private static final String _301_MOVED_PERMANENTLY = "HTTP/1.1 301 Moved Permanently\r\n";
private static final String _302_NOT_FOUND = "HTTP/1.1 302 Found\r\n";
private static final String _303_SEE_OTHER = "HTTP/1.1 303 See Other\r\n";
private static final String _304_NOT_MODIFIED = "HTTP/1.1 304 Not Modified\r\n";
private static final String _305_USE_PROXY = "HTTP/1.1 305 Use Proxy\r\n";
private static final String _307_TEMPORARY_REDIRECT = "HTTP/1.1 307 Temporary Redirect\r\n";
private static final String _400_BAD_REQUEST = "HTTP/1.1 400 Bad Request\r\n";
private static final String _401_UNAUTHORIZED = "HTTP/1.1 401 Unauthorized\r\n";
private static final String _403_FORBIDDEN = "HTTP/1.1 403 Forbidden\r\n";
private static final String _404_NOT_FOUND = "HTTP/1.1 404 Not Found\r\n";
private static final String _405_METHOD_NOT_ALLOWED = "HTTP/1.1 405 Method Not Allowed\r\n";
private static final String _406_NOT_ACCEPTABLE = "HTTP/1.1 406 Not Acceptable\r\n";
private static final String _407_PROXY_AUTH_REQUIRED = "HTTP/1.1 407 Proxy Authentication Required\r\n";
private static final String _408_REQUEST_TIMEOUT = "HTTP/1.1 408 Request Timeout\r\n";
private static final String _409_CONFLICT = "HTTP/1.1 409 Conflict\r\n";
private static final String _410_GONE = "HTTP/1.1 410 Gone\r\n";
private static final String _411_LENGTH_REQUIRED = "HTTP/1.1 411 Length Required\r\n";
private static final String _412_PRECONDITION_FAILED = "HTTP/1.1 412 Precondition Failed\r\n";
private static final String _413_REQUEST_ENTITY_LARGE = "HTTP/1.1 413 Request Entity Too Large\r\n";
private static final String _414_REQUEST_URI_TOO_LONG = "HTTP/1.1 414 Request-URI Too Long\r\n";
private static final String _415_UNSUPPORTED_MEDIA_TYPE = "HTTP/1.1 415 Unsupported Media Type\r\n";
private static final String _416_REQUEST_RANGE_NOT_SAT = "HTTP/1.1 416 Requested Range Not Satisfiable\r\n";
private static final String _417_EXPECTATION_FAILED = "HTTP/1.1 417 Expectation Failed\r\n";
private static final String _500_INTERNAL_SERVER_ERROR = "HTTP/1.1 500 Internal Server Error\r\n";
private static final String _501_NOT_IMPLEMENTED = "HTTP/1.1 501 Not Implemented\r\n";
private static final String _502_BAD_GATEWAY = "HTTP/1.1 502 Bad Gateway\r\n";
private static final String _503_SERVICE_UNAVAILABLE = "HTTP/1.1 503 Service Unavailable\r\n";
private static final String _504_GATEWAY_TIMEOUT = "HTTP/1.1 504 Gateway Timeout\r\n";
private static final String _505_VERSION_NOT_SUPPORTED = "HTTP/1.1 505 HTTP Version Not Supported\r\n";
// e.g. HTTP/1.0 200 OK or HTTP/1.0 404 Not Found (HTTP version + response status code + reason phrase)
public static String createInitialLine(int statusCode) {
switch (statusCode) {
case 200:
return _200_OK;
case 201:
return _201_CREATED;
case 202:
return _202_ACCEPTED;
case 203:
return _203_NON_AUTHORITATIVE_INFO;
case 204:
return _204_NO_CONTENT;
case 205:
return _205_RESET_CONTENT;
case 206:
return _206_PARTIAL_CONTENT;
case 300:
return _300_MULTIPLE_CHOICES;
case 301:
return _301_MOVED_PERMANENTLY;
case 302:
return _302_NOT_FOUND;
case 303:
return _303_SEE_OTHER;
case 304:
return _304_NOT_MODIFIED;
case 305:
return _305_USE_PROXY;
case 307:
return _307_TEMPORARY_REDIRECT;
case 400:
return _400_BAD_REQUEST;
case 401:
return _401_UNAUTHORIZED;
case 403:
return _403_FORBIDDEN;
case 404:
return _404_NOT_FOUND;
case 405:
return _405_METHOD_NOT_ALLOWED;
case 406:
return _406_NOT_ACCEPTABLE;
case 407:
return _407_PROXY_AUTH_REQUIRED;
case 408:
return _408_REQUEST_TIMEOUT;
case 409:
return _409_CONFLICT;
case 410:
return _410_GONE;
case 411:
return _411_LENGTH_REQUIRED;
case 412:
return _412_PRECONDITION_FAILED;
case 413:
return _413_REQUEST_ENTITY_LARGE;
case 414:
return _414_REQUEST_URI_TOO_LONG;
case 415:
return _415_UNSUPPORTED_MEDIA_TYPE;
case 416:
return _416_REQUEST_RANGE_NOT_SAT;
case 417:
return _417_EXPECTATION_FAILED;
case 500:
return _500_INTERNAL_SERVER_ERROR;
case 501:
return _501_NOT_IMPLEMENTED;
case 502:
return _502_BAD_GATEWAY;
case 503:
return _503_SERVICE_UNAVAILABLE;
case 504:
return _504_GATEWAY_TIMEOUT;
case 505:
return _505_VERSION_NOT_SUPPORTED;
default:
logger.error("Uknonwn Http status code: " + statusCode);
throw new IllegalArgumentException("Unknow Http status code: " + statusCode);
}
}
public static boolean verifyRequest(HttpRequest request) {
String version = request.getVersion();
boolean requestOk = true;
if (version.equals("HTTP/1.1")) { //TODO might be optimized? Could do version.endsWith("1"), or similar
requestOk = (request.getHeader("host") != null);
}
return requestOk;
}
public static String getEtag(byte[] bytes) {
if (md.get() == null) {
try {
md.set(MessageDigest.getInstance("MD5"));
} catch (NoSuchAlgorithmException e) {
throw new RuntimeException("MD5 cryptographic algorithm is not available.", e);
}
}
byte[] digest = md.get().digest(bytes);
BigInteger number = new BigInteger(1, digest);
return '0' + number.toString(16); // prepend a '0' to get a proper MD5 hash
}
public static String getEtag(File file) {
// TODO RS 101011 Implement if etag response header should be present while static file serving.
return "";
}
}