Java tutorial
/******************************************************************************* * Copyright 2011 See AUTHORS file. * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. ******************************************************************************/ package com.badlogic.gdx.net; /** A list of common request header constants of the HTTP protocol. See http://en.wikipedia.org/wiki/List_of_HTTP_header_fields. * @author Daniel Holderbaum */ public interface HttpRequestHeader { /** Content-Types that are acceptable for the response. * <p> * Example: Accept: text/plain */ public static final String Accept = "Accept"; /** Character sets that are acceptable. * <p> * Example: Accept-Charset: utf-8 */ public static final String AcceptCharset = "Accept-Charset"; /** List of acceptable encodings. * <p> * Example: Accept-Encoding: gzip, deflate */ public static final String AcceptEncoding = "Accept-Encoding"; /** List of acceptable human languages for response. * <p> * Example: Accept-Language: en-US */ public static final String AcceptLanguage = "Accept-Language"; /** Acceptable version in time. * <p> * Example: Accept-Datetime: Thu, 31 May 2007 20:35:00 GMT */ public static final String AcceptDatetime = "Accept-Datetime"; /** Authentication credentials for HTTP authentication. * <p> * Example: Authorization: Basic QWxhZGRpbjpvcGVuIHNlc2FtZQ== */ public static final String Authorization = "Authorization"; /** Used to specify directives that must be obeyed by all caching mechanisms along the request-response chain. * <p> * Example: Cache-Control: no-cache */ public static final String CacheControl = "Cache-Control"; /** What type of connection the user-agent would prefer. * <p> * Example: Connection: keep-alive */ public static final String Connection = "Connection"; /** An HTTP cookie previously sent by the server with Set-Cookie (below). * <p> * Example: Cookie: $Version=1=""; Skin=new=""; */ public static final String Cookie = "Cookie"; /** The length of the request body in octets (8-bit bytes). * <p> * Example: Content-Length: 348 */ public static final String ContentLength = "Content-Length"; /** A Base64-encoded binary MD5 sum of the content of the request body. * <p> * Example: Content-MD5: Q2hlY2sgSW50ZWdyaXR5IQ== */ public static final String ContentMD5 = "Content-MD5"; /** The MIME type of the body of the request (used with POST and PUT requests). * <p> * Example: Content-Type: application/x-www-form-urlencoded */ public static final String ContentType = "Content-Type"; /** The date and time that the message was sent (in "HTTP-date" format as defined by RFC 7231). * <p> * Example: Date: Tue, 15 Nov 1994 08:12:31 GMT */ public static final String Date = "Date"; /** Indicates that particular server behaviors are required by the client. * <p> * Example: Expect: 100-continue */ public static final String Expect = "Expect"; /** The email address of the user making the request. * <p> * Example: From: user@example.com */ public static final String From = "From"; /** The domain name of the server (for virtual hosting), and the TCP port number on which the server is listening. The port * number may be omitted if the port is the standard port for the service requested. * <p> * Example: en.wikipedia.org */ public static final String Host = "Host"; /** Only perform the action if the client supplied entity matches the same entity on the server. This is mainly for methods like * PUT to only update a resource if it has not been modified since the user last updated it. * <p> * Example: If-Match: "737060cd8c284d8af7ad3082f209582d" */ public static final String IfMatch = "If-Match"; /** Allows a 304 Not Modified to be returned if content is unchanged. * <p> * Example: If-Modified-Since: Sat, 29 Oct 1994 19:43:31 GMT */ public static final String IfModifiedSince = "If-Modified-Since"; /** Allows a 304 Not Modified to be returned if content is unchanged, see HTTP ETag. * <p> * Example: If-None-Match: "737060cd8c284d8af7ad3082f209582d" */ public static final String IfNoneMatch = "If-None-Match"; /** If the entity is unchanged, send me the part(s) that I am missing=""; otherwise, send me the entire new entity. * <p> * Example: If-Range: "737060cd8c284d8af7ad3082f209582d" */ public static final String IfRange = "If-Range"; /** Only send the response if the entity has not been modified since a specific time. * <p> * Example: If-Unmodified-Since: Sat, 29 Oct 1994 19:43:31 GMT */ public static final String IfUnmodifiedSince = "If-Unmodified-Since"; /** Limit the number of times the message can be forwarded through proxies or gateways. * <p> * Example: Max-Forwards: 10 */ public static final String MaxForwards = "Max-Forwards"; /** Initiates a request for cross-origin resource sharing (asks server for an 'Access-Control-Allow-Origin' response field). * <p> * Example: Origin: http://www.example-social-network.com */ public static final String Origin = "Origin"; /** Implementation-specific fields that may have various effects anywhere along the request-response chain. * <p> * Example: Pragma: no-cache */ public static final String Pragma = "Pragma"; /** Authorization credentials for connecting to a proxy. * <p> * Example: Proxy-Authorization: Basic QWxhZGRpbjpvcGVuIHNlc2FtZQ== */ public static final String ProxyAuthorization = "Proxy-Authorization"; /** Request only part of an entity. Bytes are numbered from 0. * <p> * Example: Range: bytes=500-999 */ public static final String Range = "Range"; /** This is the address of the previous web page from which a link to the currently requested page was followed. (The word * "referrer" has been misspelled in the RFC as well as in most implementations to the point that it has become standard usage * and is considered correct terminology). * <p> * Example: Referer: http://en.wikipedia.org/wiki/Main_Page */ public static final String Referer = "Referer"; /** The transfer encodings the user agent is willing to accept: the same values as for the response header field * Transfer-Encoding can be used, plus the "trailers" value (related to the "chunked" transfer method) to notify the server it * expects to receive additional fields in the trailer after the last, zero-sized, chunk. * <p> * Example: TE: trailers, deflate */ public static final String TE = "TE"; /** The user agent string of the user agent. * <p> * Example: User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:12.0) Gecko/20100101 Firefox/21.0 */ public static final String UserAgent = "User-Agent"; /** Ask the server to upgrade to another protocol. * <p> * Example: Upgrade: HTTP/2.0, SHTTP/1.3, IRC/6.9, RTA/x11 */ public static final String Upgrade = "Upgrade"; /** Informs the server of proxies through which the request was sent. * <p> * Example: Via: 1.0 fred, 1.1 example.com (Apache/1.1) */ public static final String Via = "Via"; /** A general warning about possible problems with the entity body. * <p> * Example: Warning: 199 Miscellaneous warning */ public static final String Warning = "Warning"; }