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/*
* Copyright (C) 2016 HaiYang Li
*
* 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.landawn.abacus.http;
import java.time.Instant;
import java.util.Collection;
import java.util.Date;
import java.util.HashMap;
import java.util.LinkedHashMap;
import java.util.Map;
import java.util.Set;
import java.util.SortedMap;
import java.util.function.BiConsumer;
import com.landawn.abacus.annotation.Beta;
import com.landawn.abacus.http.HttpUtil.HttpDate;
import com.landawn.abacus.util.N;
import com.landawn.abacus.util.Strings;
/**
*
* @author Haiyang Li
* @since 0.8
*/
public final class HttpHeaders {
static final char LF = Strings.LF.charAt(0);
/**
* Copied from Google Guava under Apache License v2.
*/
public static final class Names {
/**
* Instantiates a new names.
*/
private Names() {
// singleton.
}
// HTTP Request and Response header fields
/** The HTTP {@code Cache-Control} header field name. */
public static final String CACHE_CONTROL = "Cache-Control";
/** The HTTP {@code Content-Length} header field name. */
public static final String CONTENT_LENGTH = "Content-Length";
/** The HTTP {@code Content-Type} header field name. */
public static final String CONTENT_TYPE = "Content-Type";
/** The HTTP {@code Content-Encoding} header field name. */
public static final String CONTENT_ENCODING = "Content-Encoding";
/** The HTTP {@code Content-Type} header field name. */
static final String L_CONTENT_TYPE = "content-type";
/** The HTTP {@code Content-Encoding} header field name. */
static final String L_CONTENT_ENCODING = "content-encoding";
/** The HTTP {@code Date} header field name. */
public static final String DATE = "Date";
/** The HTTP {@code Pragma} header field name. */
public static final String PRAGMA = "Pragma";
/** The HTTP {@code Via} header field name. */
public static final String VIA = "Via";
/** The HTTP {@code Warning} header field name. */
public static final String WARNING = "Warning";
// HTTP Request header fields
/** The HTTP {@code Accept} header field name. */
public static final String ACCEPT = "Accept";
/** The HTTP {@code Accept} header field name. */
static final String L_ACCEPT = "accept";
/** The HTTP {@code Accept-Encoding} header field name. */
public static final String ACCEPT_ENCODING = "Accept-Encoding";
/** The HTTP {@code Accept-Encoding} header field name. */
static final String L_ACCEPT_ENCODING = "accept-encoding";
/** The HTTP {@code Accept-Charset} header field name. */
public static final String ACCEPT_CHARSET = "Accept-Charset";
/** The HTTP {@code Accept-Charset} header field name. */
static final String L_ACCEPT_CHARSET = "accept-charset";
/** The HTTP {@code Accept-Language} header field name. */
public static final String ACCEPT_LANGUAGE = "Accept-Language";
/** The HTTP {@code Access-Control-Request-Headers} header field name. */
public static final String ACCESS_CONTROL_REQUEST_HEADERS = "Access-Control-Request-Headers";
/** The HTTP {@code Access-Control-Request-Method} header field name. */
public static final String ACCESS_CONTROL_REQUEST_METHOD = "Access-Control-Request-Method";
/** The HTTP {@code Authorization} header field name. */
public static final String AUTHORIZATION = "Authorization";
/** The HTTP {@code Connection} header field name. */
public static final String CONNECTION = "Connection";
/** The HTTP {@code Cookie} header field name. */
public static final String COOKIE = "Cookie";
/**
* The HTTP {@code Early-Data} header field
* name.
*
* @since 27.0
*/
public static final String EARLY_DATA = "Early-Data";
/** The HTTP {@code Expect} header field name. */
public static final String EXPECT = "Expect";
/** The HTTP {@code From} header field name. */
public static final String FROM = "From";
/**
* The HTTP {@code Forwarded} header field name.
*
* @since 20.0
*/
public static final String FORWARDED = "Forwarded";
/**
* The HTTP {@code Follow-Only-When-Prerender-Shown} header field name.
*
* @since 17.0
*/
@Beta
public static final String FOLLOW_ONLY_WHEN_PRERENDER_SHOWN = "Follow-Only-When-Prerender-Shown";
/** The HTTP {@code Host} header field name. */
public static final String HOST = "Host";
/**
* The HTTP {@code HTTP2-Settings}
* header field name.
*
* @since 24.0
*/
public static final String HTTP2_SETTINGS = "HTTP2-Settings";
/** The HTTP {@code If-Match} header field name. */
public static final String IF_MATCH = "If-Match";
/** The HTTP {@code If-Modified-Since} header field name. */
public static final String IF_MODIFIED_SINCE = "If-Modified-Since";
/** The HTTP {@code If-None-Match} header field name. */
public static final String IF_NONE_MATCH = "If-None-Match";
/** The HTTP {@code If-Range} header field name. */
public static final String IF_RANGE = "If-Range";
/** The HTTP {@code If-Unmodified-Since} header field name. */
public static final String IF_UNMODIFIED_SINCE = "If-Unmodified-Since";
/** The HTTP {@code Last-Event-ID} header field name. */
public static final String LAST_EVENT_ID = "Last-Event-ID";
/** The HTTP {@code Max-Forwards} header field name. */
public static final String MAX_FORWARDS = "Max-Forwards";
/** The HTTP {@code Origin} header field name. */
public static final String ORIGIN = "Origin";
/** The HTTP {@code Proxy-Authorization} header field name. */
public static final String PROXY_AUTHORIZATION = "Proxy-Authorization";
/** The HTTP {@code Range} header field name. */
public static final String RANGE = "Range";
/** The HTTP {@code Referer} header field name. */
public static final String REFERER = "Referer";
/**
* The HTTP {@code Referrer-Policy} header
* field name.
*
* @since 23.4
*/
public static final String REFERRER_POLICY = "Referrer-Policy";
/**
* The HTTP {@code
* Service-Worker} header field name.
*/
public static final String SERVICE_WORKER = "Service-Worker";
/** The HTTP {@code TE} header field name. */
public static final String TE = "TE";
/** The HTTP {@code Upgrade} header field name. */
public static final String UPGRADE = "Upgrade";
/** The HTTP {@code User-Agent} header field name. */
public static final String USER_AGENT = "User-Agent";
// HTTP Response header fields
/** The HTTP {@code Accept-Ranges} header field name. */
public static final String ACCEPT_RANGES = "Accept-Ranges";
/** The HTTP {@code Access-Control-Allow-Headers} header field name. */
public static final String ACCESS_CONTROL_ALLOW_HEADERS = "Access-Control-Allow-Headers";
/** The HTTP {@code Access-Control-Allow-Methods} header field name. */
public static final String ACCESS_CONTROL_ALLOW_METHODS = "Access-Control-Allow-Methods";
/** The HTTP {@code Access-Control-Allow-Origin} header field name. */
public static final String ACCESS_CONTROL_ALLOW_ORIGIN = "Access-Control-Allow-Origin";
/** The HTTP {@code Access-Control-Allow-Credentials} header field name. */
public static final String ACCESS_CONTROL_ALLOW_CREDENTIALS = "Access-Control-Allow-Credentials";
/** The HTTP {@code Access-Control-Expose-Headers} header field name. */
public static final String ACCESS_CONTROL_EXPOSE_HEADERS = "Access-Control-Expose-Headers";
/** The HTTP {@code Access-Control-Max-Age} header field name. */
public static final String ACCESS_CONTROL_MAX_AGE = "Access-Control-Max-Age";
/** The HTTP {@code Age} header field name. */
public static final String AGE = "Age";
/** The HTTP {@code Allow} header field name. */
public static final String ALLOW = "Allow";
/** The HTTP {@code Content-Disposition} header field name. */
public static final String CONTENT_DISPOSITION = "Content-Disposition";
/** The HTTP {@code Content-Language} header field name. */
public static final String CONTENT_LANGUAGE = "Content-Language";
/** The HTTP {@code Content-Location} header field name. */
public static final String CONTENT_LOCATION = "Content-Location";
/** The HTTP {@code Content-MD5} header field name. */
public static final String CONTENT_MD5 = "Content-MD5";
/** The HTTP {@code Content-Range} header field name. */
public static final String CONTENT_RANGE = "Content-Range";
/**
* The HTTP {@code
* Content-Security-Policy} header field name.
*
* @since 15.0
*/
public static final String CONTENT_SECURITY_POLICY = "Content-Security-Policy";
/**
* The HTTP
* {@code Content-Security-Policy-Report-Only} header field name.
*
* @since 15.0
*/
public static final String CONTENT_SECURITY_POLICY_REPORT_ONLY = "Content-Security-Policy-Report-Only";
/**
* The HTTP nonstandard {@code X-Content-Security-Policy} header field name. It was introduced in
* CSP v.1 and used by the Firefox until
* version 23 and the Internet Explorer version 10. Please, use {@link #CONTENT_SECURITY_POLICY}
* to pass the CSP.
*
* @since 20.0
*/
public static final String X_CONTENT_SECURITY_POLICY = "X-Content-Security-Policy";
/**
* The HTTP nonstandard {@code X-Content-Security-Policy-Report-Only} header field name. It was
* introduced in CSP v.1 and used by the
* Firefox until version 23 and the Internet Explorer version 10. Please, use {@link
* #CONTENT_SECURITY_POLICY_REPORT_ONLY} to pass the CSP.
*
* @since 20.0
*/
public static final String X_CONTENT_SECURITY_POLICY_REPORT_ONLY = "X-Content-Security-Policy-Report-Only";
/**
* The HTTP nonstandard {@code X-WebKit-CSP} header field name. It was introduced in CSP v.1 and used by the Chrome until
* version 25. Please, use {@link #CONTENT_SECURITY_POLICY} to pass the CSP.
*
* @since 20.0
*/
public static final String X_WEBKIT_CSP = "X-WebKit-CSP";
/**
* The HTTP nonstandard {@code X-WebKit-CSP-Report-Only} header field name. It was introduced in
* CSP v.1 and used by the Chrome until
* version 25. Please, use {@link #CONTENT_SECURITY_POLICY_REPORT_ONLY} to pass the CSP.
*
* @since 20.0
*/
public static final String X_WEBKIT_CSP_REPORT_ONLY = "X-WebKit-CSP-Report-Only";
/** The HTTP {@code ETag} header field name. */
public static final String ETAG = "ETag";
/** The HTTP {@code Expires} header field name. */
public static final String EXPIRES = "Expires";
/** The HTTP {@code Last-Modified} header field name. */
public static final String LAST_MODIFIED = "Last-Modified";
/** The HTTP {@code Link} header field name. */
public static final String LINK = "Link";
/** The HTTP {@code Location} header field name. */
public static final String LOCATION = "Location";
/** The HTTP {@code P3P} header field name. Limited browser support. */
public static final String P3P = "P3P";
/** The HTTP {@code Proxy-Authenticate} header field name. */
public static final String PROXY_AUTHENTICATE = "Proxy-Authenticate";
/** The HTTP {@code Refresh} header field name. Non-standard header supported by most browsers. */
public static final String REFRESH = "Refresh";
/** The HTTP {@code Retry-After} header field name. */
public static final String RETRY_AFTER = "Retry-After";
/** The HTTP {@code Server} header field name. */
public static final String SERVER = "Server";
/**
* The HTTP {@code Server-Timing} header field
* name.
*
* @since 23.6
*/
public static final String SERVER_TIMING = "Server-Timing";
/**
* The HTTP {@code
* Service-Worker-Allowed} header field name.
*
* @since 20.0
*/
public static final String SERVICE_WORKER_ALLOWED = "Service-Worker-Allowed";
/** The HTTP {@code Set-Cookie} header field name. */
public static final String SET_COOKIE = "Set-Cookie";
/** The HTTP {@code Set-Cookie2} header field name. */
public static final String SET_COOKIE2 = "Set-Cookie2";
/**
* The HTTP {@code
* Strict-Transport-Security} header field name.
*
* @since 15.0
*/
public static final String STRICT_TRANSPORT_SECURITY = "Strict-Transport-Security";
/**
* The HTTP {@code
* Timing-Allow-Origin} header field name.
*
* @since 15.0
*/
public static final String TIMING_ALLOW_ORIGIN = "Timing-Allow-Origin";
/** The HTTP {@code Trailer} header field name. */
public static final String TRAILER = "Trailer";
/** The HTTP {@code Transfer-Encoding} header field name. */
public static final String TRANSFER_ENCODING = "Transfer-Encoding";
/** The HTTP {@code Vary} header field name. */
public static final String VARY = "Vary";
/** The HTTP {@code WWW-Authenticate} header field name. */
public static final String WWW_AUTHENTICATE = "WWW-Authenticate";
// Common, non-standard HTTP header fields
/** The HTTP {@code DNT} header field name. */
public static final String DNT = "DNT";
/** The HTTP {@code X-Content-Type-Options} header field name. */
public static final String X_CONTENT_TYPE_OPTIONS = "X-Content-Type-Options";
/** The HTTP {@code X-Do-Not-Track} header field name. */
public static final String X_DO_NOT_TRACK = "X-Do-Not-Track";
/** The HTTP {@code X-Forwarded-For} header field name (superseded by {@code Forwarded}). */
public static final String X_FORWARDED_FOR = "X-Forwarded-For";
/** The HTTP {@code X-Forwarded-Proto} header field name. */
public static final String X_FORWARDED_PROTO = "X-Forwarded-Proto";
/**
* The HTTP {@code X-Forwarded-Host} header field name.
*
* @since 20.0
*/
public static final String X_FORWARDED_HOST = "X-Forwarded-Host";
/**
* The HTTP {@code X-Forwarded-Port} header field name.
*
* @since 20.0
*/
public static final String X_FORWARDED_PORT = "X-Forwarded-Port";
/** The HTTP {@code X-Frame-Options} header field name. */
public static final String X_FRAME_OPTIONS = "X-Frame-Options";
/** The HTTP {@code X-Powered-By} header field name. */
public static final String X_POWERED_BY = "X-Powered-By";
/**
* The HTTP {@code
* Public-Key-Pins} header field name.
*
* @since 15.0
*/
@Beta
public static final String PUBLIC_KEY_PINS = "Public-Key-Pins";
/**
* The HTTP {@code
* Public-Key-Pins-Report-Only} header field name.
*
* @since 15.0
*/
@Beta
public static final String PUBLIC_KEY_PINS_REPORT_ONLY = "Public-Key-Pins-Report-Only";
/** The HTTP {@code X-Requested-With} header field name. */
public static final String X_REQUESTED_WITH = "X-Requested-With";
/** The HTTP {@code X-User-IP} header field name. */
public static final String X_USER_IP = "X-User-IP";
/**
* The HTTP {@code X-Download-Options} header field name.
*
* When the new X-Download-Options header is present with the value {@code noopen}, the user is
* prevented from opening a file download directly; instead, they must first save the file
* locally.
*
* @since 24.1
*/
@Beta
public static final String X_DOWNLOAD_OPTIONS = "X-Download-Options";
/** The HTTP {@code X-XSS-Protection} header field name. */
public static final String X_XSS_PROTECTION = "X-XSS-Protection";
/**
* The HTTP {@code
* X-DNS-Prefetch-Control} header controls DNS prefetch behavior. Value can be "on" or "off".
* By default, DNS prefetching is "on" for HTTP pages and "off" for HTTPS pages.
*/
public static final String X_DNS_PREFETCH_CONTROL = "X-DNS-Prefetch-Control";
/**
* The HTTP
* {@code Ping-From} header field name.
*
* @since 19.0
*/
public static final String PING_FROM = "Ping-From";
/**
* The HTTP
* {@code Ping-To} header field name.
*
* @since 19.0
*/
public static final String PING_TO = "Ping-To";
/**
* The HTTP {@code Sec-Metadata} header
* field name.
*
* @since 26.0
*/
public static final String SEC_METADATA = "Sec-Metadata";
/**
* The HTTP {@code
* Sec-Token-Binding} header field name.
*
* @since 25.1
*/
public static final String SEC_TOKEN_BINDING = "Sec-Token-Binding";
/**
* The HTTP {@code
* Sec-Provided-Token-Binding-ID} header field name.
*
* @since 25.1
*/
public static final String SEC_PROVIDED_TOKEN_BINDING_ID = "Sec-Provided-Token-Binding-ID";
/**
* The HTTP {@code
* Sec-Referred-Token-Binding-ID} header field name.
*
* @since 25.1
*/
public static final String SEC_REFERRED_TOKEN_BINDING_ID = "Sec-Referred-Token-Binding-ID";
}
/**
* The Class Values.
*/
public static final class Values {
/**
* Instantiates a new values.
*/
private Values() {
// singleton.
}
// application/content type.
/**
* The default HTML form content type.
*/
public static final String APPLICATION_URL_ENCODED = "application/x-www-form-urlencoded";
/** The Constant APPLICATION_XML. */
public static final String APPLICATION_XML = "application/xml";
/** The Constant APPLICATION_JSON. */
public static final String APPLICATION_JSON = "application/json";
/** The Constant APPLICATION_KRYO. */
public static final String APPLICATION_KRYO = "application/kryo";
/** The Constant TEXT_HTML. */
public static final String TEXT_HTML = "text/html";
/** The Constant TEXT_JSON. */
public static final String TEXT_JSON = "text/json";
/** The Constant TEXT_XML. */
public static final String TEXT_XML = "text/xml";
/** The Constant IMAGE_GIF. */
public static final String IMAGE_GIF = "image/gif";
/** The Constant IMAGE_JPG. */
public static final String IMAGE_JPG = "image/jpg";
/** The Constant UTF_8. */
public static final String UTF_8 = "UTF-8";
}
/**
* Copied from Google Guava under Apache License v2.
*
*
*
* Values for the {@code Referrer-Policy}
* header.
*
* @since 23.4
*/
public static final class ReferrerPolicyValues {
/**
* Instantiates a new referrer policy values.
*/
private ReferrerPolicyValues() {
}
/** The Constant NO_REFERRER. */
public static final String NO_REFERRER = "no-referrer";
/** The Constant NO_REFFERER_WHEN_DOWNGRADE. */
public static final String NO_REFFERER_WHEN_DOWNGRADE = "no-referrer-when-downgrade";
/** The Constant SAME_ORIGIN. */
public static final String SAME_ORIGIN = "same-origin";
/** The Constant ORIGIN. */
public static final String ORIGIN = "origin";
/** The Constant STRICT_ORIGIN. */
public static final String STRICT_ORIGIN = "strict-origin";
/** The Constant ORIGIN_WHEN_CROSS_ORIGIN. */
public static final String ORIGIN_WHEN_CROSS_ORIGIN = "origin-when-cross-origin";
/** The Constant STRICT_ORIGIN_WHEN_CROSS_ORIGIN. */
public static final String STRICT_ORIGIN_WHEN_CROSS_ORIGIN = "strict-origin-when-cross-origin";
/** The Constant UNSAFE_URL. */
public static final String UNSAFE_URL = "unsafe-url";
}
final Map map;
HttpHeaders() {
this.map = new HashMap<>();
}
@SuppressWarnings("rawtypes")
HttpHeaders(final Map headers) {
this.map = (Map) headers;
}
public static HttpHeaders create() {
return new HttpHeaders();
}
/**
*
* @param headers
* @return
*/
public static HttpHeaders of(final Map headers) {
N.checkArgNotNull(headers);
return new HttpHeaders(headers);
}
/**
*
* @param headers
* @return
*/
public static HttpHeaders copyOf(final Map headers) {
N.checkArgNotNull(headers);
return new HttpHeaders(new HashMap<>(headers));
}
public static String valueOf(final Object headerValue) {
if (headerValue instanceof String) {
return (String) headerValue;
} else if (headerValue instanceof Collection) {
return Strings.join((Collection) headerValue, "; ");
} else if (headerValue instanceof Date) {
return HttpDate.format((Date) headerValue);
} else if (headerValue instanceof Instant) {
return HttpDate.format(new Date(((Instant) headerValue).toEpochMilli()));
} else {
return N.stringOf(headerValue);
}
}
/**
*
* @param value
* @return
*/
public HttpHeaders setAccept(String value) {
set(Names.ACCEPT, value);
return this;
}
/**
* Sets the accept encoding.
*
* @param acceptEncoding
* @return
*/
public HttpHeaders setAcceptEncoding(String acceptEncoding) {
set(Names.ACCEPT_ENCODING, acceptEncoding);
return this;
}
/**
* Sets the accept charset.
*
* @param acceptCharset
* @return
*/
public HttpHeaders setAcceptCharset(String acceptCharset) {
set(Names.ACCEPT_CHARSET, acceptCharset);
return this;
}
/**
* Sets the accept language.
*
* @param acceptLanguage
* @return
*/
public HttpHeaders setAcceptLanguage(String acceptLanguage) {
set(Names.ACCEPT_LANGUAGE, acceptLanguage);
return this;
}
/**
* Sets the accept ranges.
*
* @param acceptRanges
* @return
*/
public HttpHeaders setAcceptRanges(String acceptRanges) {
set(Names.ACCEPT_RANGES, acceptRanges);
return this;
}
/**
* Sets the content type.
*
* @param contentType
* @return
*/
public HttpHeaders setContentType(String contentType) {
// if (hasHeader(HTTP.CONTENT_FORMAT)) {
// throw new IllegalArgumentException("The parameter 'contentFormat' has already been set");
// }
set(Names.CONTENT_TYPE, contentType);
return this;
}
/**
* Sets the content encoding.
*
* @param acceptEncoding
* @return
*/
public HttpHeaders setContentEncoding(String acceptEncoding) {
set(Names.CONTENT_ENCODING, acceptEncoding);
return this;
}
/**
* Sets the content language.
*
* @param acceptLanguage
* @return
*/
public HttpHeaders setContentLanguage(String acceptLanguage) {
set(Names.CONTENT_LANGUAGE, acceptLanguage);
return this;
}
/**
* Sets the content length.
*
* @param contentLength
* @return
*/
public HttpHeaders setContentLength(long contentLength) {
set(Names.CONTENT_LENGTH, contentLength);
return this;
}
/**
* Sets the user agent.
*
* @param userAgent
* @return
*/
public HttpHeaders setUserAgent(String userAgent) {
set(Names.USER_AGENT, userAgent);
return this;
}
/**
* Sets the cookie.
*
* @param cookie
* @return
*/
public HttpHeaders setCookie(String cookie) {
set(Names.COOKIE, cookie);
return this;
}
/**
*
* @param value
* @return
*/
public HttpHeaders setAuthorization(String value) {
set(Names.AUTHORIZATION, value);
return this;
}
/**
*
* @param value
* @return
*/
public HttpHeaders setProxyAuthorization(String value) {
set(Names.PROXY_AUTHORIZATION, value);
return this;
}
/**
*
* @param value
* @return
*/
public HttpHeaders setCacheControl(String value) {
set(Names.CACHE_CONTROL, value);
return this;
}
/**
*
* @param value
* @return
*/
public HttpHeaders setConnection(String value) {
set(Names.CONNECTION, value);
return this;
}
/**
*
* @param value
* @return
*/
public HttpHeaders setHost(String value) {
set(Names.HOST, value);
return this;
}
/**
*
* @param value
* @return
*/
public HttpHeaders setFrom(String value) {
set(Names.FROM, value);
return this;
}
/**
*
* @param name
* @param value
* @return
*/
public HttpHeaders set(String name, Object value) {
map.put(name, value);
return this;
}
/**
* Sets the all.
*
* @param m
* @return
*/
public HttpHeaders setAll(Map m) {
map.putAll(m);
return this;
}
/**
*
* @param headerName
* @return
*/
public Object get(String headerName) {
return map.get(headerName);
}
/**
*
* @param headerName
* @return
*/
public Object remove(String headerName) {
return map.remove(headerName);
}
/**
* Header name set.
*
* @return
*/
public Set headerNameSet() {
return map.keySet();
}
/**
*
* @param action
*/
public void forEach(final BiConsumer action) {
map.forEach(action);
}
/**
* Clear.
*/
public void clear() {
map.clear();
}
/**
* Checks if is empty.
*
* @return true, if is empty
*/
public boolean isEmpty() {
return map.isEmpty();
}
public Map toMap() {
return map instanceof LinkedHashMap || map instanceof SortedMap ? new LinkedHashMap<>(map) : new HashMap<>(map);
}
public HttpHeaders copy() {
return new HttpHeaders().setAll(this.map);
}
@Override
public int hashCode() {
return map.hashCode();
}
/**
*
* @param obj
* @return true, if successful
*/
@Override
public boolean equals(Object obj) {
return obj instanceof HttpHeaders && this.map.equals(((HttpHeaders) obj).map);
}
@Override
public String toString() {
return map.toString();
}
}