/*
 * Copyright (c) 2011-2017 Contributors to the Eclipse Foundation
 *
 * This program and the accompanying materials are made available under the
 * terms of the Eclipse Public License 2.0 which is available at
 * http://www.eclipse.org/legal/epl-2.0, or the Apache License, Version 2.0
 * which is available at https://www.apache.org/licenses/LICENSE-2.0.
 *
 * SPDX-License-Identifier: EPL-2.0 OR Apache-2.0
 */

package io.vertx.core.http;

import io.netty.handler.codec.http.HttpHeaderNames;
import io.netty.handler.codec.http.HttpHeaderValues;
import io.netty.util.AsciiString;

Contains often used Header names.
 It also contains a utility method to create optimized CharSequence which can be used as header name and value. 
Author:
Norman Maurer/**
 * Contains often used Header names.
 * <p>
 * It also contains a utility method to create optimized {@link CharSequence} which can be used as header name and value.
 *
 * @author <a href="mailto:nmaurer@redhat.com">Norman Maurer</a>
 */
public final class HttpHeaders {

  
JVM system property that disables HTTP headers validation, don't use this in production. /** JVM system property that disables HTTP headers validation, don't use this in production. */
  private static final String DISABLE_HTTP_HEADERS_VALIDATION_PROP_NAME = "vertx.disableHttpHeadersValidation";

  
Constant that disables HTTP headers validation, this is a constant so the JIT can eliminate validation code. /** Constant that disables HTTP headers validation, this is a constant so the JIT can eliminate validation code. */
  public static final boolean DISABLE_HTTP_HEADERS_VALIDATION = Boolean.getBoolean(DISABLE_HTTP_HEADERS_VALIDATION_PROP_NAME);

  
Accept header name
/**
   * Accept header name
   */
  public static final CharSequence ACCEPT = HttpHeaderNames.ACCEPT;

  
Accept-Charset header name
/**
   * Accept-Charset header name
   */
  public static final CharSequence ACCEPT_CHARSET = HttpHeaderNames.ACCEPT_CHARSET;

  
Accept-Encoding header name
/**
   * Accept-Encoding header name
   */
  public static final CharSequence ACCEPT_ENCODING = HttpHeaderNames.ACCEPT_ENCODING;

  
Accept-Language header name
/**
   * Accept-Language header name
   */
  public static final CharSequence ACCEPT_LANGUAGE = HttpHeaderNames.ACCEPT_LANGUAGE;

  
Accept-Ranges header name
/**
   * Accept-Ranges header name
   */
  public static final CharSequence ACCEPT_RANGES = HttpHeaderNames.ACCEPT_RANGES;

  
Accept-Patch header name
/**
   * Accept-Patch header name
   */
  public static final CharSequence ACCEPT_PATCH = HttpHeaderNames.ACCEPT_PATCH;

  
Access-Control-Allow-Credentials header name
/**
   * Access-Control-Allow-Credentials header name
   */
  public static final CharSequence ACCESS_CONTROL_ALLOW_CREDENTIALS = HttpHeaderNames.ACCESS_CONTROL_ALLOW_CREDENTIALS;

  
Access-Control-Allow-Headers header name
/**
   * Access-Control-Allow-Headers header name
   */
  public static final CharSequence ACCESS_CONTROL_ALLOW_HEADERS = HttpHeaderNames.ACCESS_CONTROL_ALLOW_HEADERS;

  
Access-Control-Allow-Methods header name
/**
   * Access-Control-Allow-Methods header name
   */
  public static final CharSequence ACCESS_CONTROL_ALLOW_METHODS = HttpHeaderNames.ACCESS_CONTROL_ALLOW_METHODS;

  
Access-Control-Allow-Origin header name
/**
   * Access-Control-Allow-Origin header name
   */
  public static final CharSequence ACCESS_CONTROL_ALLOW_ORIGIN = HttpHeaderNames.ACCESS_CONTROL_ALLOW_ORIGIN;

  
Access-Control-Expose-Headers header name
/**
   * Access-Control-Expose-Headers header name
   */
  public static final CharSequence ACCESS_CONTROL_EXPOSE_HEADERS = HttpHeaderNames.ACCESS_CONTROL_EXPOSE_HEADERS;

  
Access-Control-Max-Age header name
/**
   * Access-Control-Max-Age header name
   */
  public static final CharSequence ACCESS_CONTROL_MAX_AGE = HttpHeaderNames.ACCESS_CONTROL_MAX_AGE;

  
Access-Control-Request-Headers header name
/**
   * Access-Control-Request-Headers header name
   */
  public static final CharSequence ACCESS_CONTROL_REQUEST_HEADERS = HttpHeaderNames.ACCESS_CONTROL_REQUEST_HEADERS;

  
Access-Control-Request-Method header name
/**
   * Access-Control-Request-Method header name
   */
  public static final CharSequence ACCESS_CONTROL_REQUEST_METHOD = HttpHeaderNames.ACCESS_CONTROL_REQUEST_METHOD;

  
 Age header name
/**
   *  Age header name
   */
  public static final CharSequence AGE = HttpHeaderNames.AGE;

  
Allow header name
/**
   * Allow header name
   */
  public static final CharSequence ALLOW = HttpHeaderNames.ALLOW;

  
Authorization header name
/**
   * Authorization header name
   */
  public static final CharSequence AUTHORIZATION = HttpHeaderNames.AUTHORIZATION;

  
Cache-Control header name
/**
   * Cache-Control header name
   */
  public static final CharSequence CACHE_CONTROL = HttpHeaderNames.CACHE_CONTROL;

  
Connection header name
/**
   * Connection header name
   */
  public static final CharSequence CONNECTION = HttpHeaderNames.CONNECTION;

  
Content-Base header name
/**
   * Content-Base header name
   */
  public static final CharSequence CONTENT_BASE = HttpHeaderNames.CONTENT_BASE;

  
Content-Disposition header name
/**
   * Content-Disposition header name
   */
  public static final CharSequence CONTENT_DISPOSITION = HttpHeaderNames.CONTENT_DISPOSITION;

  
Content-Encoding header name
/**
   * Content-Encoding header name
   */
  public static final CharSequence CONTENT_ENCODING = HttpHeaderNames.CONTENT_ENCODING;

  
Content-Language header name
/**
   * Content-Language header name
   */
  public static final CharSequence CONTENT_LANGUAGE = HttpHeaderNames.CONTENT_LANGUAGE;

  
Content-Length header name
/**
   * Content-Length header name
   */
  public static final CharSequence CONTENT_LENGTH = HttpHeaderNames.CONTENT_LENGTH;

  
Content-Location header name
/**
   * Content-Location header name
   */
  public static final CharSequence CONTENT_LOCATION = HttpHeaderNames.CONTENT_LOCATION;

  
Content-Transfer-Encoding header name
/**
   * Content-Transfer-Encoding header name
   */
  public static final CharSequence CONTENT_TRANSFER_ENCODING = HttpHeaderNames.CONTENT_TRANSFER_ENCODING;

  
Content-MD5 header name
/**
   * Content-MD5 header name
   */
  public static final CharSequence CONTENT_MD5 = HttpHeaderNames.CONTENT_MD5;

  
Content-Rage header name
/**
   * Content-Rage header name
   */
  public static final CharSequence CONTENT_RANGE = HttpHeaderNames.CONTENT_RANGE;

  
Content-Type header name
/**
   * Content-Type header name
   */
  public static final CharSequence CONTENT_TYPE = HttpHeaderNames.CONTENT_TYPE;

  
Content-Cookie header name
/**
   * Content-Cookie header name
   */
  public static final CharSequence COOKIE = HttpHeaderNames.COOKIE;

  
Date header name
/**
   * Date header name
   */
  public static final CharSequence DATE = HttpHeaderNames.DATE;

  
Etag header name
/**
   * Etag header name
   */
  public static final CharSequence ETAG = HttpHeaderNames.ETAG;

  
Expect header name
/**
   * Expect header name
   */
  public static final CharSequence EXPECT = HttpHeaderNames.EXPECT;

  
Expires header name
/**
   * Expires header name
   */
  public static final CharSequence EXPIRES = HttpHeaderNames.EXPIRES;

  
From header name
/**
   * From header name
   */
  public static final CharSequence FROM = HttpHeaderNames.FROM;

  
Host header name
/**
   * Host header name
   */
  public static final CharSequence HOST = HttpHeaderNames.HOST;

  
If-Match header name
/**
   * If-Match header name
   */
  public static final CharSequence IF_MATCH = HttpHeaderNames.IF_MATCH;

  
If-Modified-Since header name
/**
   * If-Modified-Since header name
   */
  public static final CharSequence IF_MODIFIED_SINCE = HttpHeaderNames.IF_MODIFIED_SINCE;

  
If-None-Match header name
/**
   * If-None-Match header name
   */
  public static final CharSequence IF_NONE_MATCH = HttpHeaderNames.IF_NONE_MATCH;

  
Last-Modified header name
/**
   * Last-Modified header name
   */
  public static final CharSequence LAST_MODIFIED = HttpHeaderNames.LAST_MODIFIED;

  
Location header name
/**
   * Location header name
   */
  public static final CharSequence LOCATION = HttpHeaderNames.LOCATION;

  
Origin header name
/**
   * Origin header name
   */
  public static final CharSequence ORIGIN = HttpHeaderNames.ORIGIN;

  
Proxy-Authenticate header name
/**
   * Proxy-Authenticate header name
   */
  public static final CharSequence PROXY_AUTHENTICATE = HttpHeaderNames.PROXY_AUTHENTICATE;

  
Proxy-Authorization header name
/**
   * Proxy-Authorization header name
   */
  public static final CharSequence PROXY_AUTHORIZATION = HttpHeaderNames.PROXY_AUTHORIZATION;

  
Referer header name
/**
   * Referer header name
   */
  public static final CharSequence REFERER = HttpHeaderNames.REFERER;

  
Retry-After header name
/**
   * Retry-After header name
   */
  public static final CharSequence RETRY_AFTER = HttpHeaderNames.RETRY_AFTER;

  
Server header name
/**
   * Server header name
   */
  public static final CharSequence SERVER = HttpHeaderNames.SERVER;

  
Transfer-Encoding header name
/**
   * Transfer-Encoding header name
   */
  public static final CharSequence TRANSFER_ENCODING = HttpHeaderNames.TRANSFER_ENCODING;

  
User-Agent header name
/**
   * User-Agent header name
   */
  public static final CharSequence USER_AGENT = HttpHeaderNames.USER_AGENT;

  
Set-Cookie header name
/**
   * Set-Cookie header name
   */
  public static final CharSequence SET_COOKIE = HttpHeaderNames.SET_COOKIE;

  
application/x-www-form-urlencoded header value
/**
   * application/x-www-form-urlencoded header value
   */
  public static final CharSequence APPLICATION_X_WWW_FORM_URLENCODED = HttpHeaderValues.APPLICATION_X_WWW_FORM_URLENCODED;

  
chunked header value
/**
   * chunked header value
   */
  public static final CharSequence CHUNKED = HttpHeaderValues.CHUNKED;
  
close header value
/**
   * close header value
   */
  public static final CharSequence CLOSE = HttpHeaderValues.CLOSE;

  
100-continue header value
/**
   * 100-continue header value
   */
  public static final CharSequence CONTINUE = HttpHeaderValues.CONTINUE;

  
identity header value
/**
   * identity header value
   */
  public static final CharSequence IDENTITY = HttpHeaderValues.IDENTITY;
  
keep-alive header value
/**
   * keep-alive header value
   */
  public static final CharSequence KEEP_ALIVE = HttpHeaderValues.KEEP_ALIVE;

  
Upgrade header value
/**
   * Upgrade header value
   */
  public static final CharSequence UPGRADE = HttpHeaderValues.UPGRADE;
  
WebSocket header value
/**
   * WebSocket header value
   */
  public static final CharSequence WEBSOCKET = HttpHeaderValues.WEBSOCKET;

  
deflate,gzip header value
/**
   * deflate,gzip header value
   */
  public static final CharSequence DEFLATE_GZIP = createOptimized("deflate, gzip");

  
text/html header value
/**
   * text/html header value
   */
  public static final CharSequence TEXT_HTML = createOptimized("text/html");

  
GET header value
/**
   * GET header value
   */
  public static final CharSequence GET = createOptimized("GET");

  
Create an optimized CharSequence which can be used as header name or value. This should be used if you expect to use it multiple times liked for example adding the same header name or value for multiple responses or requests. /**
   * Create an optimized {@link CharSequence} which can be used as header name or value.
   * This should be used if you expect to use it multiple times liked for example adding the same header name or value
   * for multiple responses or requests.
   */
  public static CharSequence createOptimized(String value) {
    return new AsciiString(value);
  }

  private HttpHeaders() {
  }
}