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[fit] 实现请求地区解析
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‎framework/fit/java/fit-builtin/services/fit-http-classic/definition/src/main/java/modelengine/fit/http/util/i18n/DefualtLocaleResolver.java‎

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/*---------------------------------------------------------------------------------------------
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* Copyright (c) 2025 Huawei Technologies Co., Ltd. All rights reserved.
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* This file is a part of the ModelEngine Project.
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* Licensed under the MIT License. See License.txt in the project root for license information.
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*--------------------------------------------------------------------------------------------*/
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package modelengine.fit.http.util.i18n;
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import modelengine.fit.http.Cookie;
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import modelengine.fit.http.server.HttpClassicServerRequest;
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import modelengine.fit.http.server.HttpClassicServerResponse;
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import java.util.Locale;
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public class DefualtLocaleResolver implements LocaleResolver{
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public static final String DEFAULT_COOKIE_NAME = "locale";
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public static final int DEFAULT_COOKIE_MAX_AGE = 60 * 60 * 24 * 365;
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public static final String DEFAULT_COOKIE_DOMAIN = "/";
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public static final String DEFAULT_COOKIE_PATH = "/";
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private String cookieName = DEFAULT_COOKIE_NAME;
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private int cookieMaxAge = DEFAULT_COOKIE_MAX_AGE;
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private String cookieDomain = DEFAULT_COOKIE_DOMAIN;
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private String cookiePath = DEFAULT_COOKIE_PATH;
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private Locale defaultLocale;
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@Override
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public Locale resolveLocale(HttpClassicServerRequest request) {
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// 先解析 Cookie，如果没有则使用 Accept-Language 头
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String newLocale = request.cookies().get(this.cookieName).map(Cookie::value).orElse(null);
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if(newLocale != null){
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return Locale.forLanguageTag(newLocale);
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}
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String acceptLanguage = request.headers().require("Accept-Language");
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if (acceptLanguage != null && !acceptLanguage.trim().isEmpty()) {
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return Locale.forLanguageTag(acceptLanguage);
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}
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return defaultLocale;
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}
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@Override
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public void setLocale(HttpClassicServerResponse response, Locale locale) {
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if(locale != null){
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response.cookies().add(Cookie.builder()
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.name(cookieName)
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.value(locale.toLanguageTag())
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.maxAge(cookieMaxAge)
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.domain(cookieDomain)
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.path(cookiePath)
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.build());
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}else{
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response.cookies().add(Cookie.builder()
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.name(cookieName)
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.maxAge(0)
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.build());
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}
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}
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public void setCookieName(String cookieName) {
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this.cookieName = cookieName;
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}
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public void setCookieMaxAge(int cookieMaxAge) {
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this.cookieMaxAge = cookieMaxAge;
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}
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public void setCookieDomain(String cookieDomain) {
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this.cookieDomain = cookieDomain;
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}
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public void setCookiePath(String cookiePath) {
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this.cookiePath = cookiePath;
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}
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public void setDefaultLocale(Locale defaultLocale) {
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this.defaultLocale = defaultLocale;
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}
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}

‎framework/fit/java/fit-builtin/services/fit-http-classic/definition/src/main/java/modelengine/fit/http/util/i18n/LocaleContext.java‎

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/*---------------------------------------------------------------------------------------------
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* Copyright (c) 2025 Huawei Technologies Co., Ltd. All rights reserved.
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* This file is a part of the ModelEngine Project.
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* Licensed under the MIT License. See License.txt in the project root for license information.
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*--------------------------------------------------------------------------------------------*/
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package modelengine.fit.http.util.i18n;
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import java.util.Locale;
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/**
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* 地区上下文，包含地区信息
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*
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* @author fit-framework
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* @since 2025-01-01
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*/
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public class LocaleContext {
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private final Locale locale;
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public LocaleContext(Locale locale) {
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this.locale = locale;
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}
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public Locale getLocale() {
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return locale;
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}
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}

‎framework/fit/java/fit-builtin/services/fit-http-classic/definition/src/main/java/modelengine/fit/http/util/i18n/LocaleContextHolder.java‎

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/*---------------------------------------------------------------------------------------------
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* Copyright (c) 2025 Huawei Technologies Co., Ltd. All rights reserved.
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* This file is a part of the ModelEngine Project.
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* Licensed under the MIT License. See License.txt in the project root for license information.
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*--------------------------------------------------------------------------------------------*/
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package modelengine.fit.http.util.i18n;
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import java.util.Locale;
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public class LocaleContextHolder {
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private static final ThreadLocal<LocaleContext> LOCALE_CONTEXT_HOLDER = new ThreadLocal<>();
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/**
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* 设置当前线程的地区上下文
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*/
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public static void setLocaleContext(LocaleContext localeContext) {
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LOCALE_CONTEXT_HOLDER.set(localeContext);
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}
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/**
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* 获取当前线程的地区上下文
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*/
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public static LocaleContext getLocaleContext() {
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return LOCALE_CONTEXT_HOLDER.get();
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}
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/**
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* 获取当前线程的地区
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*/
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public static Locale getLocale() {
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LocaleContext context = getLocaleContext();
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return context != null ? context.getLocale() : Locale.getDefault();
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}
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/**
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* 清除当前线程的地区上下文
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*/
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public static void clear() {
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LOCALE_CONTEXT_HOLDER.remove();
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}
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}

‎framework/fit/java/fit-builtin/services/fit-http-classic/definition/src/main/java/modelengine/fit/http/util/i18n/LocaleResolveFilter.java‎

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package modelengine.fit.http.util.i18n;
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import modelengine.fit.http.server.*;
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import modelengine.fitframework.annotation.Scope;
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import java.util.List;
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import java.util.Locale;
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public class LocaleResolveFilter implements HttpServerFilter {
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private LocaleResolver localeResolver = null;
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private List<String> matchPatterns = List.of("/**");
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private List<String> mismatchPatterns = null;
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private Scope scope = Scope.GLOBAL;
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public LocaleResolveFilter(LocaleResolver localeResolver) {
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localeResolver = localeResolver;
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}
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public LocaleResolveFilter(){
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this.localeResolver = new DefualtLocaleResolver();
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}
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@Override
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public String name() {
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return "LocaleResolveFilter";
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}
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@Override
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public int priority() {
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return 0;
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}
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@Override
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public List<String> matchPatterns() {
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return matchPatterns;
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}
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@Override
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public List<String> mismatchPatterns() {
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return mismatchPatterns;
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}
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@Override
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public void doFilter(HttpClassicServerRequest request, HttpClassicServerResponse response, HttpServerFilterChain chain) throws DoHttpServerFilterException {
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try {
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// 如果参数中带有地区，则直接设置地区
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String paramLocale = request.queries().first("locale").orElse( null);
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Locale responseLocale = null;
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if(paramLocale != null && !paramLocale.trim().isEmpty()){
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responseLocale = Locale.forLanguageTag(paramLocale);
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LocaleContextHolder.setLocaleContext(new LocaleContext(responseLocale));
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}
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// 如果参数中不包含地区，则解析
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else{
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Locale locale =localeResolver.resolveLocale(request);
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LocaleContextHolder.setLocaleContext(new LocaleContext(locale));
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}
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chain.doFilter(request, response);
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// responseLocale是用户期望设置的地区，不受 server 端处理的影响
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localeResolver.setLocale(response, responseLocale);
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}finally {
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LocaleContextHolder.clear();
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}
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}
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@Override
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public Scope scope() {
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return scope;
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}
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}

‎framework/fit/java/fit-builtin/services/fit-http-classic/definition/src/main/java/modelengine/fit/http/util/i18n/LocaleResolver.java‎

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/*---------------------------------------------------------------------------------------------
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* Copyright (c) 2025 Huawei Technologies Co., Ltd. All rights reserved.
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* This file is a part of the ModelEngine Project.
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* Licensed under the MIT License. See License.txt in the project root for license information.
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*--------------------------------------------------------------------------------------------*/
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package modelengine.fit.http.util.i18n;
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import modelengine.fit.http.server.HttpClassicServerRequest;
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import modelengine.fit.http.server.HttpClassicServerResponse;
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import java.util.Locale;
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/**
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* 地区解析器接口，用于从HTTP请求中解析用户的地区设置
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*
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* @author fit-framework
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* @since 2025-01-01
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*/
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public interface LocaleResolver {
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/**
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* 解析用户的地区设置
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*
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* @param request HTTP请求 {@link HttpClassicServerRequest}。
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* @return 解析出来的地区 {@link Locale}。
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*/
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Locale resolveLocale(HttpClassicServerRequest request);
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/**
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* 设置地区到响应中
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*
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* @param response HTTP响应 {@link HttpClassicServerResponse}。
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* @param locale 要设置的地区 {@link Locale}。
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*/
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void setLocale(HttpClassicServerResponse response, Locale locale);
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}

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