Instruction:
作为 Java 安全专家，检测此代码中的安全漏洞：
## 内容1
### 文件路径：
xwiki-platform-core/xwiki-platform-mail/xwiki-platform-mail-send/xwiki-platform-mail-send-default/pom.xml
### 代码内容：
<?xml version="1.0" encoding="UTF-8"?>

<!--
 * See the NOTICE file distributed with this work for additional
 * information regarding copyright ownership.
 *
 * This is free software; you can redistribute it and/or modify it
 * under the terms of the GNU Lesser General Public License as
 * published by the Free Software Foundation; either version 2.1 of
 * the License, or (at your option) any later version.
 *
 * This software is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this software; if not, write to the Free
 * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
 * 02110-1301 USA, or see the FSF site: http://www.fsf.org.
-->

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
  <modelVersion>4.0.0</modelVersion>
  <parent>
    <groupId>org.xwiki.platform</groupId>
    <artifactId>xwiki-platform-mail-send</artifactId>
    <version>15.1-SNAPSHOT</version>
  </parent>
  <packaging>jar</packaging>
  <artifactId>xwiki-platform-mail-send-default</artifactId>
  <name>XWiki Platform - Mail - Send - Default Implementation</name>
  <description>Default implementation of the API to send emails</description>
  <properties>
    <xwiki.jacoco.instructionRatio>0.77</xwiki.jacoco.instructionRatio>
    <!-- Name to display by the Extension Manager -->
    <xwiki.extension.name>Mail Sender Implementation</xwiki.extension.name>
    <xwiki.extension.namespaces>{root}</xwiki.extension.namespaces>
  </properties>
  <dependencies>
    <dependency>
      <groupId>org.xwiki.platform</groupId>
      <artifactId>xwiki-platform-mail-general</artifactId>
      <version>${project.version}</version>
    </dependency>
    <dependency>
      <groupId>org.xwiki.platform</groupId>
      <artifactId>xwiki-platform-mail-send-api</artifactId>
      <version>${project.version}</version>
    </dependency>
    <dependency>
      <groupId>org.xwiki.commons</groupId>
      <artifactId>xwiki-commons-script</artifactId>
      <version>${commons.version}</version>
    </dependency>
    <dependency>
      <groupId>org.xwiki.platform</groupId>
      <artifactId>xwiki-platform-configuration-default</artifactId>
      <version>${project.version}</version>
    </dependency>
    <dependency>
      <groupId>org.xwiki.platform</groupId>
      <artifactId>xwiki-platform-oldcore</artifactId>
      <version>${project.version}</version>
    </dependency>
    <dependency>
      <groupId>org.xwiki.commons</groupId>
      <artifactId>xwiki-commons-text</artifactId>
      <version>${commons.version}</version>
    </dependency>
    <!-- Needed for working with XWikiStubContextProvider and XWikiRequest and by the Extension Manager to properly
         load some components (e.g. DefaultXWikiStubContextProvider) -->
    <dependency>
      <groupId>javax.servlet</groupId>
      <artifactId>javax.servlet-api</artifactId>
    </dependency>
    <dependency>
      <groupId>org.xwiki.platform</groupId>
      <artifactId>xwiki-platform-model-api</artifactId>
      <version>${project.version}</version>
    </dependency>
    <dependency>
      <groupId>org.xwiki.platform</groupId>
      <artifactId>xwiki-platform-bridge</artifactId>
      <version>${project.version}</version>
    </dependency>

    <!-- Test Dependencies -->
    <!-- Override the Servlet environment that is drawn by the oldcore dependency. This works because the
        StandardEnvironment component has a higher priority than the ServletEnvironment one (they both implement
        Environment). -->
    <dependency>
      <groupId>org.xwiki.commons</groupId>
      <artifactId>xwiki-commons-environment-standard</artifactId>
      <version>${commons.version}</version>
      <scope>test</scope>
    </dependency>
    <dependency>
      <groupId>org.xwiki.platform</groupId>
      <artifactId>xwiki-platform-oldcore</artifactId>
      <version>${project.version}</version>
      <type>test-jar</type>
      <scope>test</scope>
    </dependency>
    <dependency>
      <groupId>com.icegreen</groupId>
      <artifactId>greenmail-junit5</artifactId>
      <scope>test</scope>
    </dependency>
    <dependency>
      <groupId>org.xwiki.commons</groupId>
      <artifactId>xwiki-commons-tool-test-component</artifactId>
      <version>${commons.version}</version>
      <scope>test</scope>
    </dependency>
  </dependencies>
</project>

## 内容2
### 文件路径：
xwiki-platform-core/xwiki-platform-mail/xwiki-platform-mail-send/xwiki-platform-mail-send-default/src/main/java/org/xwiki/mail/internal/MailConfigMandatoryDocumentInitializer.java
### 代码内容：
/*
 * See the NOTICE file distributed with this work for additional
 * information regarding copyright ownership.
 *
 * This is free software; you can redistribute it and/or modify it
 * under the terms of the GNU Lesser General Public License as
 * published by the Free Software Foundation; either version 2.1 of
 * the License, or (at your option) any later version.
 *
 * This software is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this software; if not, write to the Free
 * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
 * 02110-1301 USA, or see the FSF site: http://www.fsf.org.
 */
package org.xwiki.mail.internal;

import com.xpn.xwiki.XWiki;
import com.xpn.xwiki.XWikiContext;
import com.xpn.xwiki.XWikiException;
import com.xpn.xwiki.doc.MandatoryDocumentInitializer;
import com.xpn.xwiki.doc.XWikiDocument;
import com.xpn.xwiki.objects.BaseObject;
import org.apache.commons.lang3.StringUtils;
import org.slf4j.Logger;
import org.xwiki.component.annotation.Component;
import org.xwiki.mail.internal.configuration.SendMailConfigClassDocumentConfigurationSource;
import org.xwiki.model.reference.DocumentReference;
import org.xwiki.model.reference.EntityReference;
import org.xwiki.model.reference.LocalDocumentReference;
import org.xwiki.wiki.descriptor.WikiDescriptorManager;

import javax.inject.Inject;
import javax.inject.Named;
import javax.inject.Provider;
import javax.inject.Singleton;
import java.util.Collections;
import java.util.HashMap;
import java.util.Map;

/**
 * Create the mandatory {@code Mail.MailConfig} document in the current wiki.
 *
 * @version $Id$
 * @since 11.8RC1
 */
@Component
@Singleton
@Named("Mail.MailConfig")
public class MailConfigMandatoryDocumentInitializer implements MandatoryDocumentInitializer
{
    @Inject
    private Logger logger;

    @Inject
    private WikiDescriptorManager wikiDescriptorManager;

    @Inject
    private Provider<XWikiContext> xcontextProvider;

    @Override
    public EntityReference getDocumentReference()
    {
        return SendMailConfigClassDocumentConfigurationSource.MAILCONFIG_REFERENCE;
    }

    @Override
    public boolean updateDocument(XWikiDocument document)
    {
        boolean needsUpdate = false;

        if (updateReferences(document)) {
            needsUpdate = true;
        }

        // Ensure the document is hidden, like every technical document
        if (!document.isHidden()) {
            document.setHidden(true);
            needsUpdate = true;
        }

        // Set the title
        if (document.getTitle().isEmpty()) {
            document.setTitle("Mail Configuration");
            needsUpdate = true;
        }

        // Ensure the document has a Mail.GeneralMailConfigClass xobject
        if (addGeneralMailConfigClassXObject(document)) {
            needsUpdate = true;
        }

        // Ensure the document has a Mail.SendMailConfigClass xobject
        if (addSendMailConfigClassXObject(document)) {
            needsUpdate = true;
        }

        // Migration: Since the XWiki.Configurable class used to be located in Mail.MailConfig and has been moved to
        // Mail.MailConfigurable, we need to remove it from this page in case it's there as otherwise there would be
        // duplicate Admin UI entries...
        // TODO: Ideally this code should be executed only once.
        if (removeConfigurableClass(document)) {
            needsUpdate = true;
        }

        return needsUpdate;
    }

    private boolean updateReferences(XWikiDocument document)
    {
        boolean needsUpdate = false;

        // Ensure the document has a creator
        if (document.getCreatorReference() == null) {
            document.setCreatorReference(new DocumentReference(this.wikiDescriptorManager.getMainWikiId(),
                    XWiki.SYSTEM_SPACE, "superadmin"));
            needsUpdate = true;
        }

        // Ensure the document has an author
        if (document.getAuthorReference() == null) {
            document.setAuthorReference(document.getCreatorReference());
            needsUpdate = true;
        }

        // Ensure the document has a parent
        if (document.getParentReference() == null) {
            LocalDocumentReference parentReference = new LocalDocumentReference(
                    SendMailConfigClassDocumentConfigurationSource.MAIL_SPACE, "WebHome");
            document.setParentReference(parentReference);
            needsUpdate = true;
        }

        return needsUpdate;
    }

    private boolean removeConfigurableClass(XWikiDocument document)
    {
        boolean needsUpdate = false;

        LocalDocumentReference configurableClassReference =
                new LocalDocumentReference(XWiki.SYSTEM_SPACE, "ConfigurableClass");
        if (document.getXObject(configurableClassReference) != null) {
            document.removeXObjects(configurableClassReference);
            needsUpdate = true;
        }

        return needsUpdate;
    }

    private boolean addGeneralMailConfigClassXObject(XWikiDocument document)
    {
        LocalDocumentReference generalMailClassReference = new LocalDocumentReference(
                SendMailConfigClassDocumentConfigurationSource.MAIL_SPACE, "GeneralMailConfigClass");
        return addXObject(document, generalMailClassReference,
            Collections.singletonMap("obfuscateEmailAddresses", "obfuscate"));
    }

    private boolean addSendMailConfigClassXObject(XWikiDocument document)
    {
        LocalDocumentReference sendMailClassReference =
                SendMailConfigClassDocumentConfigurationSource.SENDMAILCONFIGCLASS_REFERENCE;
        Map<String, String> fieldMappings = new HashMap<>();
        fieldMappings.put("admin_email", "from");
        fieldMappings.put("smtp_server", "host");
        fieldMappings.put("smtp_port", "port");
        fieldMappings.put("smtp_server_username", "username");
        fieldMappings.put("smtp_server_password", "password");
        fieldMappings.put("javamail_extra_props", "properties");
        return addXObject(document, sendMailClassReference, fieldMappings);
    }

    private boolean addXObject(XWikiDocument document, LocalDocumentReference classReference,
        Map<String, String> fieldMappings)
    {
        boolean needsUpdate = false;

        if (document.getXObject(classReference) == null) {
            try {
                XWikiContext xwikiContext = this.xcontextProvider.get();
                XWiki xwiki = xwikiContext.getWiki();
                BaseObject object = document.newXObject(classReference, xwikiContext);
                // Backward compatibility: migrate data from XWiki.XWikiPreferences.
                // Only set values if they're different from the default so that values are inherited by default
                for (Map.Entry<String, String> entry : fieldMappings.entrySet()) {
                    setField(entry.getKey(), entry.getValue(), object, xwiki, xwikiContext);
                }
                needsUpdate = true;
            } catch (XWikiException e) {
                this.logger.error(
                    String.format("Error adding a [%s] object to the document [%s]",
                        classReference.toString(), document.getDocumentReference().toString()));
            }
        }

        return needsUpdate;
    }

    private void setField(String oldPropertyName, String newPropertyName, BaseObject object, XWiki xwiki,
        XWikiContext xwikiContext)
    {
        String oldValue = xwiki.getSpacePreference(oldPropertyName, xwikiContext);
        if (!StringUtils.isEmpty(oldValue)) {
            object.set(newPropertyName, oldValue, xwikiContext);
        }
    }
}

## 内容3
### 文件路径：
xwiki-platform-core/xwiki-platform-security/xwiki-platform-security-authorization/xwiki-platform-security-authorization-bridge/pom.xml
### 代码内容：
<?xml version="1.0" encoding="UTF-8"?>

<!--
 * See the NOTICE file distributed with this work for additional
 * information regarding copyright ownership.
 *
 * This is free software; you can redistribute it and/or modify it
 * under the terms of the GNU Lesser General Public License as
 * published by the Free Software Foundation; either version 2.1 of
 * the License, or (at your option) any later version.
 *
 * This software is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this software; if not, write to the Free
 * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
 * 02110-1301 USA, or see the FSF site: http://www.fsf.org.
-->

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
  <modelVersion>4.0.0</modelVersion>
  <parent>
    <groupId>org.xwiki.platform</groupId>
    <artifactId>xwiki-platform-security-authorization</artifactId>
    <version>15.1-SNAPSHOT</version>
  </parent>
  <artifactId>xwiki-platform-security-authorization-bridge</artifactId>
  <name>XWiki Platform - Security - Authorization - Bridge</name>
  <description>Authorization API implementation using oldcore</description>
  <properties>
    <xwiki.jacoco.instructionRatio>0.70</xwiki.jacoco.instructionRatio>
    <!-- TODO: Remove once the tests have been fixed to not output anything to the console! -->
    <xwiki.surefire.captureconsole.skip>true</xwiki.surefire.captureconsole.skip>
    <!-- Name to display by the Extension Manager -->
    <xwiki.extension.name>Authorization Bridge</xwiki.extension.name>
    <xwiki.extension.features>
      <!-- Old names of this module used for retro compatibility when resolving dependencies of old extensions -->
      org.xwiki.platform:xwiki-platform-security-bridge
    </xwiki.extension.features>
  </properties>
  <dependencies>
    <dependency>
      <groupId>org.xwiki.commons</groupId>
      <artifactId>xwiki-commons-context</artifactId>
      <version>${commons.version}</version>
    </dependency>
    <dependency>
      <groupId>org.xwiki.commons</groupId>
      <artifactId>xwiki-commons-observation-api</artifactId>
      <version>${commons.version}</version>
    </dependency>
    <dependency>
      <groupId>org.xwiki.commons</groupId>
      <artifactId>xwiki-commons-text</artifactId>
      <version>${commons.version}</version>
    </dependency>
    <dependency>
      <groupId>org.xwiki.platform</groupId>
      <artifactId>xwiki-platform-bridge</artifactId>
      <version>${project.version}</version>
    </dependency>
    <dependency>
      <groupId>org.xwiki.platform</groupId>
      <artifactId>xwiki-platform-model-api</artifactId>
      <version>${project.version}</version>
    </dependency>
    <dependency>
      <groupId>org.xwiki.platform</groupId>
      <artifactId>xwiki-platform-oldcore</artifactId>
      <version>${project.version}</version>
    </dependency>
    <dependency>
      <groupId>org.xwiki.platform</groupId>
      <artifactId>xwiki-platform-security-authorization-api</artifactId>
      <version>${project.version}</version>
    </dependency>
    <dependency>
      <groupId>org.apache.commons</groupId>
      <artifactId>commons-lang3</artifactId>
    </dependency>
    <!-- Test dependencies -->
    <dependency>
      <groupId>org.xwiki.commons</groupId>
      <artifactId>xwiki-commons-tool-test-component</artifactId>
      <version>${commons.version}</version>
      <scope>test</scope>
    </dependency>
    <dependency>
      <groupId>org.xwiki.commons</groupId>
      <artifactId>xwiki-commons-environment-standard</artifactId>
      <version>${commons.version}</version>
      <scope>test</scope>
    </dependency>
    <dependency>
      <groupId>org.xwiki.platform</groupId>
      <artifactId>xwiki-platform-test-oldcore</artifactId>
      <version>${project.version}</version>
      <type>pom</type>
      <scope>test</scope>
    </dependency>
    <!-- XWikiDocument needs UserReferenceSerializer and UserReferenceResolver components -->
    <dependency>
      <groupId>org.xwiki.platform</groupId>
      <artifactId>xwiki-platform-user-default</artifactId>
      <version>${project.version}</version>
      <scope>test</scope>
    </dependency>
    <dependency>
      <groupId>org.jmock</groupId>
      <artifactId>jmock-legacy</artifactId>
      <scope>test</scope>
    </dependency>
  </dependencies>
</project>

## 内容4
### 文件路径：
xwiki-platform-core/xwiki-platform-security/xwiki-platform-security-authorization/xwiki-platform-security-authorization-bridge/src/main/resources/META-INF/components.txt
### 代码内容：
500:org.xwiki.security.authorization.internal.BridgeAuthorizationManager
org.xwiki.security.authorization.internal.DefaultContextualAuthorizationManager
org.xwiki.security.authorization.internal.DefaultSecurityCacheRulesInvalidator
org.xwiki.security.authorization.internal.DefaultSecurityCacheRulesInvalidatorListener
org.xwiki.security.authorization.internal.DefaultSecurityEntryReader
org.xwiki.security.authorization.internal.RightsFilterListener
org.xwiki.security.internal.DefaultUserBridge
org.xwiki.security.internal.DefaultXWikiBridge

Output:
【漏洞类型】权限配置漏洞

【严重性】High

【漏洞摘要】原始代码中，`MailConfigMandatoryDocumentInitializer` 类在初始化邮件配置文档时，没有设置明确的权限控制，这可能导致未授权用户能够查看、编辑或删除邮件配置信息，从而引发安全风险。具体表现为，邮件配置文档的创建和更新逻辑中，没有对文档的访问权限进行验证和设置，这使得文档在默认情况下可能对所有用户开放。

【关键代码模式】`updateDocument` 方法中没有权限控制逻辑。

【修复方法说明】修复方法通过引入 `DocumentInitializerRightsManager` 类，并在 `updateDocument` 方法中调用其 `restrictToAdmin` 方法，来确保邮件配置文档的访问权限仅限于管理员组。这解决了权限配置缺失的问题。最佳实践是确保所有关键文档在初始化时都有明确的权限设置，以防止未授权访问。


Instruction:
作为 Java 安全专家，检测此代码中的安全漏洞：
## 内容1
### 文件路径：
airsonic-main/src/main/java/org/airsonic/player/security/GlobalSecurityConfig.java
### 代码内容：
package org.airsonic.player.security;

import org.airsonic.player.service.JWTSecurityService;
import org.airsonic.player.service.SecurityService;
import org.airsonic.player.service.SettingsService;
import org.apache.commons.lang3.StringUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.autoconfigure.security.SecurityProperties;
import org.springframework.context.ApplicationEventPublisher;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.core.annotation.Order;
import org.springframework.security.config.annotation.authentication.builders.AuthenticationManagerBuilder;
import org.springframework.security.config.annotation.authentication.configurers.GlobalAuthenticationConfigurerAdapter;
import org.springframework.security.config.annotation.method.configuration.EnableGlobalMethodSecurity;
import org.springframework.security.config.annotation.web.builders.HttpSecurity;
import org.springframework.security.config.annotation.web.configuration.WebSecurityConfigurerAdapter;
import org.springframework.security.config.http.SessionCreationPolicy;
import org.springframework.security.web.authentication.UsernamePasswordAuthenticationFilter;
import org.springframework.security.web.context.request.async.WebAsyncManagerIntegrationFilter;
import org.springframework.security.web.util.matcher.AntPathRequestMatcher;

@Configuration
@Order(SecurityProperties.ACCESS_OVERRIDE_ORDER)
@EnableGlobalMethodSecurity(securedEnabled = true, prePostEnabled = true)
public class GlobalSecurityConfig extends GlobalAuthenticationConfigurerAdapter {

    private static Logger logger = LoggerFactory.getLogger(GlobalSecurityConfig.class);

    static final String FAILURE_URL = "/login?error=1";

    @Autowired
    private SecurityService securityService;

    @Autowired
    private CsrfSecurityRequestMatcher csrfSecurityRequestMatcher;

    @Autowired
    SettingsService settingsService;

    @Autowired
    CustomUserDetailsContextMapper customUserDetailsContextMapper;

    @Autowired
    ApplicationEventPublisher eventPublisher;

    @Autowired
    public void configureGlobal(AuthenticationManagerBuilder auth) throws Exception {
        if (settingsService.isLdapEnabled()) {
            auth.ldapAuthentication()
                    .contextSource()
                        .managerDn(settingsService.getLdapManagerDn())
                        .managerPassword(settingsService.getLdapManagerPassword())
                        .url(settingsService.getLdapUrl())
                    .and()
                    .userSearchFilter(settingsService.getLdapSearchFilter())
                    .userDetailsContextMapper(customUserDetailsContextMapper);
        }
        auth.userDetailsService(securityService);
        String jwtKey = settingsService.getJWTKey();
        if(StringUtils.isBlank(jwtKey)) {
            logger.warn("Generating new jwt key");
            jwtKey = JWTSecurityService.generateKey();
            settingsService.setJWTKey(jwtKey);
            settingsService.save();
        }
        auth.authenticationProvider(new JWTAuthenticationProvider(jwtKey));
    }

    @Configuration
    @Order(1)
    public class ExtSecurityConfiguration extends WebSecurityConfigurerAdapter {

        public ExtSecurityConfiguration() {
            super(true);
        }

        @Bean(name = "jwtAuthenticationFilter")
        public JWTRequestParameterProcessingFilter jwtAuthFilter() throws Exception {
            return new JWTRequestParameterProcessingFilter(authenticationManager(), FAILURE_URL);
        }

        @Override
        protected void configure(HttpSecurity http) throws Exception {

            http = http.addFilter(new WebAsyncManagerIntegrationFilter());
            http = http.addFilterBefore(jwtAuthFilter(), UsernamePasswordAuthenticationFilter.class);

            http
                    .antMatcher("/ext/**")
                    .csrf().requireCsrfProtectionMatcher(csrfSecurityRequestMatcher).and()
                    .headers().frameOptions().sameOrigin().and()
                    .authorizeRequests()
                    .antMatchers("/ext/stream/**", "/ext/coverArt*", "/ext/share/**", "/ext/hls/**")
                    .hasAnyRole("TEMP", "USER").and()
                    .sessionManagement().sessionCreationPolicy(SessionCreationPolicy.STATELESS).and()
                    .exceptionHandling().and()
                    .securityContext().and()
                    .requestCache().and()
                    .anonymous().and()
                    .servletApi();
        }
    }

    @Configuration
    @Order(2)
    public class WebSecurityConfiguration extends WebSecurityConfigurerAdapter {

        @Override
        protected void configure(HttpSecurity http) throws Exception {

            RESTRequestParameterProcessingFilter restAuthenticationFilter = new RESTRequestParameterProcessingFilter();
            restAuthenticationFilter.setAuthenticationManager(authenticationManagerBean());
            restAuthenticationFilter.setSecurityService(securityService);
            restAuthenticationFilter.setEventPublisher(eventPublisher);
            http = http.addFilterBefore(restAuthenticationFilter, UsernamePasswordAuthenticationFilter.class);

            http
                    .csrf()
                    .requireCsrfProtectionMatcher(csrfSecurityRequestMatcher)
                    .and().headers()
                    .frameOptions()
                    .sameOrigin()
                    .and().authorizeRequests()
                    .antMatchers("/recover*", "/accessDenied*",
                            "/style/**", "/icons/**", "/flash/**", "/script/**",
                            "/sonos/**", "/crossdomain.xml", "/login", "/error")
                    .permitAll()
                    .antMatchers("/personalSettings*", "/passwordSettings*",
                            "/playerSettings*", "/shareSettings*", "/passwordSettings*")
                    .hasRole("SETTINGS")
                    .antMatchers("/generalSettings*", "/advancedSettings*", "/userSettings*",
                            "/musicFolderSettings*", "/databaseSettings*", "/transcodeSettings*", "/rest/startScan*")
                    .hasRole("ADMIN")
                    .antMatchers("/deletePlaylist*", "/savePlaylist*", "/db*")
                    .hasRole("PLAYLIST")
                    .antMatchers("/download*")
                    .hasRole("DOWNLOAD")
                    .antMatchers("/upload*")
                    .hasRole("UPLOAD")
                    .antMatchers("/createShare*")
                    .hasRole("SHARE")
                    .antMatchers("/changeCoverArt*", "/editTags*")
                    .hasRole("COVERART")
                    .antMatchers("/setMusicFileInfo*")
                    .hasRole("COMMENT")
                    .antMatchers("/podcastReceiverAdmin*")
                    .hasRole("PODCAST")
                    .antMatchers("/**")
                    .hasRole("USER")
                    .anyRequest().authenticated()
                    .and().formLogin()
                    .loginPage("/login")
                    .permitAll()
                    .defaultSuccessUrl("/index", true)
                    .failureUrl(FAILURE_URL)
                    .usernameParameter("j_username")
                    .passwordParameter("j_password")
                    // see http://docs.spring.io/spring-security/site/docs/3.2.4.RELEASE/reference/htmlsingle/#csrf-logout
                    .and().logout().logoutRequestMatcher(new AntPathRequestMatcher("/logout", "GET")).logoutSuccessUrl(
                    "/login?logout")
                    .and().rememberMe().key("airsonic");
        }

    }
}

Output:
【漏洞类型】固定密钥的Remember-Me功能
【严重性】Medium
【漏洞摘要】在原始代码中，Remember-Me功能使用了一个固定密钥("airsonic")来加密用户的cookie值。这种做法在安全性上存在缺陷，因为攻击者可以通过捕获cookie并使用这个固定密钥来尝试离线破解用户的密码。Spring Security的默认Remember-Me机制使用的是MD5哈希，这在现代密码学中被认为是不安全的，因为MD5容易受到碰撞攻击。因此，使用固定密钥进一步降低了安全性。
【关键代码模式】
- `rememberMe().key("airsonic")`：这是导致漏洞的根本行。使用固定密钥来加密Remember-Me cookie。
- `SecureRandom`：在修复代码中使用的类，用于生成伪随机数，以提高密钥的安全性。
- `StringUtils.isBlank(jwtKey)`：在原始代码中用于检查JWT密钥是否为空的函数。
- `JWTSecurityService.generateKey()`：在原始代码中用于生成JWT密钥的函数。
【修复方法说明】修复方法通过使用`SecureRandom`生成一个随机密钥来替代固定密钥，从而提高Remember-Me cookie的安全性。最佳实践是使用强随机数生成器来生成密钥，以防止攻击者通过已知密钥进行破解。


Instruction:
作为 Java 安全专家，检测此代码中的安全漏洞：
## 内容1
### 文件路径：
themes/src/main/resources/theme/keycloak.v2/account/resources/welcome-page-scripts.js
### 代码内容：
var isWelcomePage = function () {
    var winHash = window.location.hash;
    return winHash === '#/';
};

var toggleReact = function () {
    var welcomeScreen = document.getElementById("welcomeScreen");
    var spinnerScreen = document.getElementById("spinner_screen");
    var reactScreen = document.getElementById("main_react_container");

    if (!isWelcomePage() && !isReactLoading) {
        if (welcomeScreen) welcomeScreen.style.display = 'none';
        if (spinnerScreen) spinnerScreen.style.display = 'none';
        if (reactScreen) reactScreen.style.display = 'block';
        if (reactScreen) reactScreen.style.height = '100%';
    } else if (!isWelcomePage() && isReactLoading) {
        if (welcomeScreen) welcomeScreen.style.display = 'none';
        if (reactScreen) reactScreen.style.display = 'none';
        if (spinnerScreen) spinnerScreen.style.display = 'block';
        if (spinnerScreen) spinnerScreen.style.height = '100%';
    } else {
        if (reactScreen) reactScreen.style.display = 'none';
        if (spinnerScreen) spinnerScreen.style.display = 'none';
        if (welcomeScreen) welcomeScreen.style.display = 'block';
        if (welcomeScreen) welcomeScreen.style.height = '100%';
    }
};

function loggedInUserName() {
    let userName = l18nMsg['unknownUser'];
    if (keycloak.tokenParsed) {
        const givenName = keycloak.tokenParsed.given_name;
        const familyName = keycloak.tokenParsed.family_name;
        const preferredUsername = keycloak.tokenParsed.preferred_username;
        if (givenName && familyName) {
            userName = [givenName, familyName].reduce((acc, value, index) =>
                acc.replace('{{param_'+ index + '}}', value), l18nMsg['fullName']
            );
        } else {
            userName = (givenName || familyName) || preferredUsername || userName;
        }
    }
    return userName;
}

var toggleMobileDropdown = function () {
    var mobileDropdown = document.getElementById("landingMobileDropdown");
    var mobileKebab = document.getElementById("landingMobileKebab");
    var mobileKebabButton = document.getElementById("landingMobileKebabButton");
    if (mobileDropdown.style.display === 'none') {
        mobileDropdown.style.display = 'block';
        mobileKebab.classList.add("pf-m-expanded");
        mobileKebabButton.setAttribute("aria-expanded", "true");
    } else {
        mobileDropdown.style.display = 'none';
        mobileKebab.classList.remove("pf-m-expanded");
        mobileKebabButton.setAttribute("aria-expanded", "false");
    }
}

var loadjs = function (url, loadListener) {
    const script = document.createElement("script");
    script.src = resourceUrl + url;
    script.type = "module";
    if (loadListener)
        script.addEventListener("load", loadListener);
    document.head.appendChild(script);
};

Output:
【漏洞类型】Stored Cross-Site Scripting (XSS) Attack
【严重性】High
【漏洞摘要】这是由于用户输入（如 `keycloak.tokenParsed.given_name`, `keycloak.tokenParsed.family_name`, `keycloak.tokenParsed.preferred_username`）未进行适当的验证和清理，直接插入到页面中，可能导致攻击者通过操纵这些输入在用户浏览器中执行恶意脚本。具体表现为在 `loggedInUserName` 函数中，用户输入未经处理直接替换到页面元素中。
【关键代码模式】`l18nMsg['fullName']` 中的占位符替换，以及直接将用户输入赋值给 `userName`。
【修复方法说明】通过创建一个虚拟的 `span` 元素并将用户输入设置为文本内容，然后返回其 `innerHTML`，实现了对用户输入的HTML转义，防止XSS攻击。


Instruction: 作为 Java 安全专家，检测此代码中的安全漏洞：

Output:
【漏洞类型】SQL注入漏洞
【严重性】High
【漏洞摘要】SQL注入是一种常见的安全漏洞，攻击者通过在输入字段中插入恶意SQL代码，可以操纵数据库查询。在这个代码中，原始代码通过拼接字符串来构建SQL查询，使得`c.getPackagesLike()`的值直接插入到SQL语句中，这可能导致SQL注入攻击。具体表现为`String query = "select object_name from user_objects where object_type = 'PACKAGE' and object_name like '" + c.getPackagesLike() + "'";`这一行。
【关键代码模式】字符串拼接SQL查询，直接将用户输入或配置值插入到SQL语句中。
【修复方法说明】修复方法通过使用预编译的SQL语句和参数绑定来防止SQL注入，具体实现为`String query = "select object_name from user_objects where object_type = 'PACKAGE' and object_name like ?";`，然后在`jdbcTemplate.query`方法中传递参数`c.getPackagesLike()`。这种方法遵循了使用参数化查询的最佳实践，有效防止了SQL注入攻击。


Instruction:
作为 Java 安全专家，检测此代码中的安全漏洞：
## 内容1
### 文件路径：
codec-http/src/main/java/io/netty/handler/codec/http/DefaultHttpHeaders.java
### 代码内容：
package io.netty.handler.codec.http;

import io.netty.handler.codec.CharSequenceValueConverter;
import io.netty.handler.codec.DateFormatter;
import io.netty.handler.codec.DefaultHeaders;
import io.netty.handler.codec.DefaultHeaders.NameValidator;
import io.netty.handler.codec.DefaultHeadersImpl;
import io.netty.handler.codec.HeadersUtils;
import io.netty.handler.codec.ValueConverter;
import io.netty.util.AsciiString;
import io.netty.util.ByteProcessor;
import io.netty.util.internal.PlatformDependent;

import java.util.ArrayList;
import java.util.Calendar;
import java.util.Collections;
import java.util.Date;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.Map.Entry;
import java.util.Set;

import static io.netty.util.AsciiString.CASE_INSENSITIVE_HASHER;
import static io.netty.util.AsciiString.CASE_SENSITIVE_HASHER;

/**
 * Default implementation of {@link HttpHeaders}.
 */
public class DefaultHttpHeaders extends HttpHeaders {
    private static final int HIGHEST_INVALID_VALUE_CHAR_MASK = ~15;
    private static final ByteProcessor HEADER_NAME_VALIDATOR = new ByteProcessor() {
        @Override
        public boolean process(byte value) throws Exception {
            validateHeaderNameElement(value);
            return true;
        }
    };
    static final NameValidator<CharSequence> HttpNameValidator = new NameValidator<CharSequence>() {
        @Override
        public void validateName(CharSequence name) {
            if (name == null || name.length() == 0) {
                throw new IllegalArgumentException("empty headers are not allowed [" + name + "]");
            }
            if (name instanceof AsciiString) {
                try {
                    ((AsciiString) name).forEachByte(HEADER_NAME_VALIDATOR);
                } catch (Exception e) {
                    PlatformDependent.throwException(e);
                }
            } else {
                // Go through each character in the name
                for (int index = 0; index < name.length(); ++index) {
                    validateHeaderNameElement(name.charAt(index));
                }
            }
        }
    };

    private final DefaultHeaders<CharSequence, CharSequence, ?> headers;

    public DefaultHttpHeaders() {
        this(true);
    }

    /**
     * Warning! Setting validate to false will mean that Netty won't
     * validate & protect against user-supplied header values that are malicious.
     * This can leave your server implementation vulnerable to
     *
     *     CWE-113: Improper Neutralization of CRLF Sequences in HTTP Headers ('HTTP Response Splitting')
     * .
     * When disabling this validation, it is the responsibility of the caller to ensure that the values supplied
     * do not contain a non-url-escaped carriage return (CR) and/or line feed (LF) characters.
     *
     * @param validate Should Netty validate Header values to ensure they aren't malicious.
     */
    public DefaultHttpHeaders(boolean validate) {
        this(validate, nameValidator(validate));
    }

    protected DefaultHttpHeaders(boolean validate, NameValidator<CharSequence> nameValidator) {
        this(new DefaultHeadersImpl<CharSequence, CharSequence>(CASE_INSENSITIVE_HASHER,
                                                                valueConverter(validate),
                                                                nameValidator));
    }

    protected DefaultHttpHeaders(DefaultHeaders<CharSequence, CharSequence, ?> headers) {
        this.headers = headers;
    }

    @Override
    public HttpHeaders add(HttpHeaders headers) {
        if (headers instanceof DefaultHttpHeaders) {
            this.headers.add(((DefaultHttpHeaders) headers).headers);
            return this;
        } else {
            return super.add(headers);
        }
    }

    @Override
    public HttpHeaders set(HttpHeaders headers) {
        if (headers instanceof DefaultHttpHeaders) {
            this.headers.set(((DefaultHttpHeaders) headers).headers);
            return this;
        } else {
            return super.set(headers);
        }
    }

    @Override
    public HttpHeaders add(String name, Object value) {
        headers.addObject(name, value);
        return this;
    }

    @Override
    public HttpHeaders add(CharSequence name, Object value) {
        headers.addObject(name, value);
        return this;
    }

    @Override
    public HttpHeaders add(String name, Iterable<?> values) {
        headers.addObject(name, values);
        return this;
    }

    @Override
    public HttpHeaders add(CharSequence name, Iterable<?> values) {
        headers.addObject(name, values);
        return this;
    }

    @Override
    public HttpHeaders addInt(CharSequence name, int value) {
        headers.addInt(name, value);
        return this;
    }

    @Override
    public HttpHeaders addShort(CharSequence name, short value) {
        headers.addShort(name, value);
        return this;
    }

    @Override
    public HttpHeaders remove(String name) {
        headers.remove(name);
        return this;
    }

    @Override
    public HttpHeaders remove(CharSequence name) {
        headers.remove(name);
        return this;
    }

    @Override
    public HttpHeaders set(String name, Object value) {
        headers.setObject(name, value);
        return this;
    }

    @Override
    public HttpHeaders set(CharSequence name, Object value) {
        headers.setObject(name, value);
        return this;
    }

    @Override
    public HttpHeaders set(String name, Iterable<?> values) {
        headers.setObject(name, values);
        return this;
    }

    @Override
    public HttpHeaders set(CharSequence name, Iterable<?> values) {
        headers.setObject(name, values);
        return this;
    }

    @Override
    public HttpHeaders setInt(CharSequence name, int value) {
        headers.setInt(name, value);
        return this;
    }

    @Override
    public HttpHeaders setShort(CharSequence name, short value) {
        headers.setShort(name, value);
        return this;
    }

    @Override
    public HttpHeaders clear() {
        headers.clear();
        return this;
    }

    @Override
    public String get(String name) {
        return get((CharSequence) name);
    }

    @Override
    public String get(CharSequence name) {
        return HeadersUtils.getAsString(headers, name);
    }

    @Override
    public Integer getInt(CharSequence name) {
        return headers.getInt(name);
    }

    @Override
    public int getInt(CharSequence name, int defaultValue) {
        return headers.getInt(name, defaultValue);
    }

    @Override
    public Short getShort(CharSequence name) {
        return headers.getShort(name);
    }

    @Override
    public short getShort(CharSequence name, short defaultValue) {
        return headers.getShort(name, defaultValue);
    }

    @Override
    public Long getTimeMillis(CharSequence name) {
        return headers.getTimeMillis(name);
    }

    @Override
    public long getTimeMillis(CharSequence name, long defaultValue) {
        return headers.getTimeMillis(name, defaultValue);
    }

    @Override
    public List<String> getAll(String name) {
        return getAll((CharSequence) name);
    }

    @Override
    public List<String> getAll(CharSequence name) {
        return HeadersUtils.getAllAsString(headers, name);
    }

    @Override
    public List<Entry<String, String>> entries() {
        if (isEmpty()) {
            return Collections.emptyList();
        }
        List<Entry<String, String>> entriesConverted = new ArrayList<Entry<String, String>>(
                headers.size());
        for (Entry<String, String> entry : this) {
            entriesConverted.add(entry);
        }
        return entriesConverted;
    }

    @Deprecated
    @Override
    public Iterator<Map.Entry<String, String>> iterator() {
        return HeadersUtils.iteratorAsString(headers);
    }

    @Override
    public Iterator<Entry<CharSequence, CharSequence>> iteratorCharSequence() {
        return headers.iterator();
    }

    @Override
    public Iterator<String> valueStringIterator(CharSequence name) {
        final Iterator<CharSequence> itr = valueCharSequenceIterator(name);
        return new Iterator<String>() {
            @Override
            public boolean hasNext() {
                return itr.hasNext();
            }

            @Override
            public String next() {
                return itr.next().toString();
            }

            @Override
            public void remove() {
                itr.remove();
            }
        };
    }

    @Override
    public Iterator<CharSequence> valueCharSequenceIterator(CharSequence name) {
        return headers.valueIterator(name);
    }

    @Override
    public boolean contains(String name) {
        return contains((CharSequence) name);
    }

    @Override
    public boolean contains(CharSequence name) {
        return headers.contains(name);
    }

    @Override
    public boolean isEmpty() {
        return headers.isEmpty();
    }

    @Override
    public int size() {
        return headers.size();
    }

    @Override
    public boolean contains(String name, String value, boolean ignoreCase) {
        return contains((CharSequence) name, (CharSequence) value, ignoreCase);
    }

    @Override
    public boolean contains(CharSequence name, CharSequence value, boolean ignoreCase) {
        return headers.contains(name, value, ignoreCase ? CASE_INSENSITIVE_HASHER : CASE_SENSITIVE_HASHER);
    }

    @Override
    public Set<String> names() {
        return HeadersUtils.namesAsString(headers);
    }

    @Override
    public boolean equals(Object o) {
        return o instanceof DefaultHttpHeaders
                && headers.equals(((DefaultHttpHeaders) o).headers, CASE_SENSITIVE_HASHER);
    }

    @Override
    public int hashCode() {
        return headers.hashCode(CASE_SENSITIVE_HASHER);
    }

    @Override
    public HttpHeaders copy() {
        return new DefaultHttpHeaders(headers.copy());
    }

    private static void validateHeaderNameElement(byte value) {
        switch (value) {
        case 0x00:
        case '\t':
        case '\n':
        case 0x0b:
        case '\f':
        case '\r':
        case ' ':
        case ',':
        case ':':
        case ';':
        case '=':
            throw new IllegalArgumentException(
               "a header name cannot contain the following prohibited characters: =,;: \\t\\r\\n\\v\\f: " +
                       value);
        default:
            // Check to see if the character is not an ASCII character, or invalid
            if (value < 0) {
                throw new IllegalArgumentException("a header name cannot contain non-ASCII character: " + value);
            }
        }
    }

    private static void validateHeaderNameElement(char value) {
        switch (value) {
        case 0x00:
        case '\t':
        case '\n':
        case 0x0b:
        case '\f':
        case '\r':
        case ' ':
        case ',':
        case ':':
        case ';':
        case '=':
            throw new IllegalArgumentException(
               "a header name cannot contain the following prohibited characters: =,;: \\t\\r\\n\\v\\f: " +
                       value);
        default:
            // Check to see if the character is not an ASCII character, or invalid
            if (value > 127) {
                throw new IllegalArgumentException("a header name cannot contain non-ASCII character: " +
                        value);
            }
        }
    }

    static ValueConverter<CharSequence> valueConverter(boolean validate) {
        return validate ? HeaderValueConverterAndValidator.INSTANCE : HeaderValueConverter.INSTANCE;
    }

    @SuppressWarnings("unchecked")
    static NameValidator<CharSequence> nameValidator(boolean validate) {
        return validate ? HttpNameValidator : NameValidator.NOT_NULL;
    }

    private static class HeaderValueConverter extends CharSequenceValueConverter {
        static final HeaderValueConverter INSTANCE = new HeaderValueConverter();

        @Override
        public CharSequence convertObject(Object value) {
            if (value instanceof CharSequence) {
                return (CharSequence) value;
            }
            if (value instanceof Date) {
                return DateFormatter.format((Date) value);
            }
            if (value instanceof Calendar) {
                return DateFormatter.format(((Calendar) value).getTime());
            }
            return value.toString();
        }
    }

    private static final class HeaderValueConverterAndValidator extends HeaderValueConverter {
        static final HeaderValueConverterAndValidator INSTANCE = new HeaderValueConverterAndValidator();

        @Override
        public CharSequence convertObject(Object value) {
            CharSequence seq = super.convertObject(value);
            int state = 0;
            // Start looping through each of the character
            for (int index = 0; index < seq.length(); index++) {
                state = validateValueChar(seq, state, seq.charAt(index));
            }

            if (state != 0) {
                throw new IllegalArgumentException("a header value must not end with '\\r' or '\\n':" + seq);
            }
            return seq;
        }

        private static int validateValueChar(CharSequence seq, int state, char character) {
            /*
             * State:
             * 0: Previous character was neither CR nor LF
             * 1: The previous character was CR
             * 2: The previous character was LF
             */
            if ((character & HIGHEST_INVALID_VALUE_CHAR_MASK) == 0) {
                // Check the absolutely prohibited characters.
                switch (character) {
                case 0x0: // NULL
                    throw new IllegalArgumentException("a header value contains a prohibited character '\0': " + seq);
                case 0x0b: // Vertical tab
                    throw new IllegalArgumentException("a header value contains a prohibited character '\\v': " + seq);
                case '\f':
                    throw new IllegalArgumentException("a header value contains a prohibited character '\\f': " + seq);
                default:
                    break;
                }
            }

            // Check the CRLF (HT | SP) pattern
            switch (state) {
                case 0:
                    switch (character) {
                        case '\r':
                            return 1;
                        case '\n':
                            return 2;
                        default:
                            break;
                    }
                    break;
                case 1:
                    if (character == '\n') {
                        return 2;
                    }
                    throw new IllegalArgumentException("only '\\n' is allowed after '\\r': " + seq);
                case 2:
                    switch (character) {
                        case '\t':
                        case ' ':
                            return 0;
                        default:
                            throw new IllegalArgumentException("only ' ' and '\\t' are allowed after '\\n': " + seq);
                    }
                default:
                    break;
            }
            return state;
        }
    }
}

## 内容2
### 文件路径：
codec-http/src/main/java/io/netty/handler/codec/http/HttpObjectDecoder.java
### 代码内容：
package io.netty.handler.codec.http;

import static io.netty.util.internal.ObjectUtil.checkPositive;

import io.netty.buffer.ByteBuf;
import io.netty.buffer.Unpooled;
import io.netty.channel.ChannelHandlerContext;
import io.netty.channel.ChannelPipeline;
import io.netty.handler.codec.ByteToMessageDecoder;
import io.netty.handler.codec.DecoderResult;
import io.netty.handler.codec.PrematureChannelClosureException;
import io.netty.handler.codec.TooLongFrameException;
import io.netty.util.ByteProcessor;
import io.netty.util.internal.AppendableCharSequence;

import java.util.List;

/**
 * Decodes {@link ByteBuf}s into {@link HttpMessage}s and
 * {@link HttpContent}s.
 *
 *
Parameters that prevents excessive memory consumption

 *

 *

 * Name	Default value	Meaning
 *

 *

 * {@code maxInitialLineLength}
 * {@value #DEFAULT_MAX_INITIAL_LINE_LENGTH}
 * The maximum length of the initial line
 *     (e.g. {@code "GET / HTTP/1.0"} or {@code "HTTP/1.0 200 OK"})
 *     If the length of the initial line exceeds this value, a
 *     {@link TooLongFrameException} will be raised.
 *

 *

 * {@code maxHeaderSize}
 * {@value #DEFAULT_MAX_HEADER_SIZE}
 * The maximum length of all headers.  If the sum of the length of each
 *     header exceeds this value, a {@link TooLongFrameException} will be raised.
 *

 *

 * {@code maxChunkSize}
 * {@value #DEFAULT_MAX_CHUNK_SIZE}
 * The maximum length of the content or each chunk.  If the content length
 *     (or the length of each chunk) exceeds this value, the content or chunk
 *     will be split into multiple {@link HttpContent}s whose length is
 *     {@code maxChunkSize} at maximum.
 *

 *

 *
 *
Parameters that control parsing behavior

 *

 *

 * Name	Default value	Meaning
 *

 *

 * {@code allowDuplicateContentLengths}
 * {@value #DEFAULT_ALLOW_DUPLICATE_CONTENT_LENGTHS}
 * When set to {@code false}, will reject any messages that contain multiple Content-Length header fields.
 *     When set to {@code true}, will allow multiple Content-Length headers only if they are all the same decimal value.
 *     The duplicated field-values will be replaced with a single valid Content-Length field.
 *     See RFC 7230, Section 3.3.2.
 *

 *

 * {@code allowPartialChunks}
 * {@value #DEFAULT_ALLOW_PARTIAL_CHUNKS}
 * If the length of a chunk exceeds the {@link ByteBuf}s readable bytes and {@code allowPartialChunks}
 *     is set to {@code true}, the chunk will be split into multiple {@link HttpContent}s.
 *     Otherwise, if the chunk size does not exceed {@code maxChunkSize} and {@code allowPartialChunks}
 *     is set to {@code false}, the {@link ByteBuf} is not decoded into an {@link HttpContent} until
 *     the readable bytes are greater or equal to the chunk size.
 *

 *

 *
 *
Chunked Content

 *
 * If the content of an HTTP message is greater than {@code maxChunkSize} or
 * the transfer encoding of the HTTP message is 'chunked', this decoder
 * generates one {@link HttpMessage} instance and its following
 * {@link HttpContent}s per single HTTP message to avoid excessive memory
 * consumption. For example, the following HTTP message:
 *

 * GET / HTTP/1.1
 * Transfer-Encoding: chunked
 *
 * 1a
 * abcdefghijklmnopqrstuvwxyz
 * 10
 * 1234567890abcdef
 * 0
 * Content-MD5: ...
 * [blank line]
 *

 * triggers {@link HttpRequestDecoder} to generate 3 objects:
 *

 *
An {@link HttpRequest},

 *
The first {@link HttpContent} whose content is {@code 'abcdefghijklmnopqrstuvwxyz'},

 *
The second {@link LastHttpContent} whose content is {@code '1234567890abcdef'}, which marks
 * the end of the content.

 *

 *
 * If you prefer not to handle {@link HttpContent}s by yourself for your
 * convenience, insert {@link HttpObjectAggregator} after this decoder in the
 * {@link ChannelPipeline}.  However, please note that your server might not
 * be as memory efficient as without the aggregator.
 *
 *
Extensibility

 *
 * Please note that this decoder is designed to be extended to implement
 * a protocol derived from HTTP, such as
 * RTSP and
 * ICAP.
 * To implement the decoder of such a derived protocol, extend this class and
 * implement all abstract methods properly.
 */
public abstract class HttpObjectDecoder extends ByteToMessageDecoder {
    public static final int DEFAULT_MAX_INITIAL_LINE_LENGTH = 4096;
    public static final int DEFAULT_MAX_HEADER_SIZE = 8192;
    public static final boolean DEFAULT_CHUNKED_SUPPORTED = true;
    public static final boolean DEFAULT_ALLOW_PARTIAL_CHUNKS = true;
    public static final int DEFAULT_MAX_CHUNK_SIZE = 8192;
    public static final boolean DEFAULT_VALIDATE_HEADERS = true;
    public static final int DEFAULT_INITIAL_BUFFER_SIZE = 128;
    public static final boolean DEFAULT_ALLOW_DUPLICATE_CONTENT_LENGTHS = false;

    private static final String EMPTY_VALUE = "";

    private final int maxChunkSize;
    private final boolean chunkedSupported;
    private final boolean allowPartialChunks;
    protected final boolean validateHeaders;
    private final boolean allowDuplicateContentLengths;
    private final HeaderParser headerParser;
    private final LineParser lineParser;

    private HttpMessage message;
    private long chunkSize;
    private long contentLength = Long.MIN_VALUE;
    private volatile boolean resetRequested;

    // These will be updated by splitHeader(...)
    private CharSequence name;
    private CharSequence value;

    private LastHttpContent trailer;

    /**
     * The internal state of {@link HttpObjectDecoder}.
     * Internal use only.
     */
    private enum State {
        SKIP_CONTROL_CHARS,
        READ_INITIAL,
        READ_HEADER,
        READ_VARIABLE_LENGTH_CONTENT,
        READ_FIXED_LENGTH_CONTENT,
        READ_CHUNK_SIZE,
        READ_CHUNKED_CONTENT,
        READ_CHUNK_DELIMITER,
        READ_CHUNK_FOOTER,
        BAD_MESSAGE,
        UPGRADED
    }

    private State currentState = State.SKIP_CONTROL_CHARS;

    /**
     * Creates a new instance with the default
     * {@code maxInitialLineLength (4096}}, {@code maxHeaderSize (8192)}, and
     * {@code maxChunkSize (8192)}.
     */
    protected HttpObjectDecoder() {
        this(DEFAULT_MAX_INITIAL_LINE_LENGTH, DEFAULT_MAX_HEADER_SIZE, DEFAULT_MAX_CHUNK_SIZE,
             DEFAULT_CHUNKED_SUPPORTED);
    }

    /**
     * Creates a new instance with the specified parameters.
     */
    protected HttpObjectDecoder(
            int maxInitialLineLength, int maxHeaderSize, int maxChunkSize, boolean chunkedSupported) {
        this(maxInitialLineLength, maxHeaderSize, maxChunkSize, chunkedSupported, DEFAULT_VALIDATE_HEADERS);
    }

    /**
     * Creates a new instance with the specified parameters.
     */
    protected HttpObjectDecoder(
            int maxInitialLineLength, int maxHeaderSize, int maxChunkSize,
            boolean chunkedSupported, boolean validateHeaders) {
        this(maxInitialLineLength, maxHeaderSize, maxChunkSize, chunkedSupported, validateHeaders,
             DEFAULT_INITIAL_BUFFER_SIZE);
    }

    /**
     * Creates a new instance with the specified parameters.
     */
    protected HttpObjectDecoder(
            int maxInitialLineLength, int maxHeaderSize, int maxChunkSize,
            boolean chunkedSupported, boolean validateHeaders, int initialBufferSize) {
        this(maxInitialLineLength, maxHeaderSize, maxChunkSize, chunkedSupported, validateHeaders, initialBufferSize,
             DEFAULT_ALLOW_DUPLICATE_CONTENT_LENGTHS);
    }

    /**
     * Creates a new instance with the specified parameters.
     */
    protected HttpObjectDecoder(
            int maxInitialLineLength, int maxHeaderSize, int maxChunkSize,
            boolean chunkedSupported, boolean validateHeaders, int initialBufferSize,
            boolean allowDuplicateContentLengths) {
        this(maxInitialLineLength, maxHeaderSize, maxChunkSize, chunkedSupported, validateHeaders, initialBufferSize,
            allowDuplicateContentLengths, DEFAULT_ALLOW_PARTIAL_CHUNKS);
    }

    /**
     * Creates a new instance with the specified parameters.
     */
    protected HttpObjectDecoder(
            int maxInitialLineLength, int maxHeaderSize, int maxChunkSize,
            boolean chunkedSupported, boolean validateHeaders, int initialBufferSize,
            boolean allowDuplicateContentLengths, boolean allowPartialChunks) {
        checkPositive(maxInitialLineLength, "maxInitialLineLength");
        checkPositive(maxHeaderSize, "maxHeaderSize");
        checkPositive(maxChunkSize, "maxChunkSize");

        AppendableCharSequence seq = new AppendableCharSequence(initialBufferSize);
        lineParser = new LineParser(seq, maxInitialLineLength);
        headerParser = new HeaderParser(seq, maxHeaderSize);
        this.maxChunkSize = maxChunkSize;
        this.chunkedSupported = chunkedSupported;
        this.validateHeaders = validateHeaders;
        this.allowDuplicateContentLengths = allowDuplicateContentLengths;
        this.allowPartialChunks = allowPartialChunks;
    }

    @Override
    protected void decode(ChannelHandlerContext ctx, ByteBuf buffer, List<Object> out) throws Exception {
        if (resetRequested) {
            resetNow();
        }

        switch (currentState) {
        case SKIP_CONTROL_CHARS:
            // Fall-through
        case READ_INITIAL: try {
            AppendableCharSequence line = lineParser.parse(buffer);
            if (line == null) {
                return;
            }
            String[] initialLine = splitInitialLine(line);
            if (initialLine.length < 3) {
                // Invalid initial line - ignore.
                currentState = State.SKIP_CONTROL_CHARS;
                return;
            }

            message = createMessage(initialLine);
            currentState = State.READ_HEADER;
            // fall-through
        } catch (Exception e) {
            out.add(invalidMessage(buffer, e));
            return;
        }
        case READ_HEADER: try {
            State nextState = readHeaders(buffer);
            if (nextState == null) {
                return;
            }
            currentState = nextState;
            switch (nextState) {
            case SKIP_CONTROL_CHARS:
                // fast-path
                // No content is expected.
                out.add(message);
                out.add(LastHttpContent.EMPTY_LAST_CONTENT);
                resetNow();
                return;
            case READ_CHUNK_SIZE:
                if (!chunkedSupported) {
                    throw new IllegalArgumentException("Chunked messages not supported");
                }
                // Chunked encoding - generate HttpMessage first.  HttpChunks will follow.
                out.add(message);
                return;
            default:
                /**
                 * RFC 7230, 3.3.3 states that if a
                 * request does not have either a transfer-encoding or a content-length header then the message body
                 * length is 0. However for a response the body length is the number of octets received prior to the
                 * server closing the connection. So we treat this as variable length chunked encoding.
                 */
                long contentLength = contentLength();
                if (contentLength == 0 || contentLength == -1 && isDecodingRequest()) {
                    out.add(message);
                    out.add(LastHttpContent.EMPTY_LAST_CONTENT);
                    resetNow();
                    return;
                }

                assert nextState == State.READ_FIXED_LENGTH_CONTENT ||
                        nextState == State.READ_VARIABLE_LENGTH_CONTENT;

                out.add(message);

                if (nextState == State.READ_FIXED_LENGTH_CONTENT) {
                    // chunkSize will be decreased as the READ_FIXED_LENGTH_CONTENT state reads data chunk by chunk.
                    chunkSize = contentLength;
                }

                // We return here, this forces decode to be called again where we will decode the content
                return;
            }
        } catch (Exception e) {
            out.add(invalidMessage(buffer, e));
            return;
        }
        case READ_VARIABLE_LENGTH_CONTENT: {
            // Keep reading data as a chunk until the end of connection is reached.
            int toRead = Math.min(buffer.readableBytes(), maxChunkSize);
            if (toRead > 0) {
                ByteBuf content = buffer.readRetainedSlice(toRead);
                out.add(new DefaultHttpContent(content));
            }
            return;
        }
        case READ_FIXED_LENGTH_CONTENT: {
            int readLimit = buffer.readableBytes();

            // Check if the buffer is readable first as we use the readable byte count
            // to create the HttpChunk. This is needed as otherwise we may end up with
            // create an HttpChunk instance that contains an empty buffer and so is
            // handled like it is the last HttpChunk.
            //
            // See https://github.com/netty/netty/issues/433
            if (readLimit == 0) {
                return;
            }

            int toRead = Math.min(readLimit, maxChunkSize);
            if (toRead > chunkSize) {
                toRead = (int) chunkSize;
            }
            ByteBuf content = buffer.readRetainedSlice(toRead);
            chunkSize -= toRead;

            if (chunkSize == 0) {
                // Read all content.
                out.add(new DefaultLastHttpContent(content, validateHeaders));
                resetNow();
            } else {
                out.add(new DefaultHttpContent(content));
            }
            return;
        }
        /**
         * everything else after this point takes care of reading chunked content. basically, read chunk size,
         * read chunk, read and ignore the CRLF and repeat until 0
         */
        case READ_CHUNK_SIZE: try {
            AppendableCharSequence line = lineParser.parse(buffer);
            if (line == null) {
                return;
            }
            int chunkSize = getChunkSize(line.toString());
            this.chunkSize = chunkSize;
            if (chunkSize == 0) {
                currentState = State.READ_CHUNK_FOOTER;
                return;
            }
            currentState = State.READ_CHUNKED_CONTENT;
            // fall-through
        } catch (Exception e) {
            out.add(invalidChunk(buffer, e));
            return;
        }
        case READ_CHUNKED_CONTENT: {
            assert chunkSize <= Integer.MAX_VALUE;
            int toRead = Math.min((int) chunkSize, maxChunkSize);
            if (!allowPartialChunks && buffer.readableBytes() < toRead) {
                return;
            }
            toRead = Math.min(toRead, buffer.readableBytes());
            if (toRead == 0) {
                return;
            }
            HttpContent chunk = new DefaultHttpContent(buffer.readRetainedSlice(toRead));
            chunkSize -= toRead;

            out.add(chunk);

            if (chunkSize != 0) {
                return;
            }
            currentState = State.READ_CHUNK_DELIMITER;
            // fall-through
        }
        case READ_CHUNK_DELIMITER: {
            final int wIdx = buffer.writerIndex();
            int rIdx = buffer.readerIndex();
            while (wIdx > rIdx) {
                byte next = buffer.getByte(rIdx++);
                if (next == HttpConstants.LF) {
                    currentState = State.READ_CHUNK_SIZE;
                    break;
                }
            }
            buffer.readerIndex(rIdx);
            return;
        }
        case READ_CHUNK_FOOTER: try {
            LastHttpContent trailer = readTrailingHeaders(buffer);
            if (trailer == null) {
                return;
            }
            out.add(trailer);
            resetNow();
            return;
        } catch (Exception e) {
            out.add(invalidChunk(buffer, e));
            return;
        }
        case BAD_MESSAGE: {
            // Keep discarding until disconnection.
            buffer.skipBytes(buffer.readableBytes());
            break;
        }
        case UPGRADED: {
            int readableBytes = buffer.readableBytes();
            if (readableBytes > 0) {
                // Keep on consuming as otherwise we may trigger an DecoderException,
                // other handler will replace this codec with the upgraded protocol codec to
                // take the traffic over at some point then.
                // See https://github.com/netty/netty/issues/2173
                out.add(buffer.readBytes(readableBytes));
            }
            break;
        }
        default:
            break;
        }
    }

    @Override
    protected void decodeLast(ChannelHandlerContext ctx, ByteBuf in, List<Object> out) throws Exception {
        super.decodeLast(ctx, in, out);

        if (resetRequested) {
            // If a reset was requested by decodeLast() we need to do it now otherwise we may produce a
            // LastHttpContent while there was already one.
            resetNow();
        }
        // Handle the last unfinished message.
        if (message != null) {
            boolean chunked = HttpUtil.isTransferEncodingChunked(message);
            if (currentState == State.READ_VARIABLE_LENGTH_CONTENT && !in.isReadable() && !chunked) {
                // End of connection.
                out.add(LastHttpContent.EMPTY_LAST_CONTENT);
                resetNow();
                return;
            }

            if (currentState == State.READ_HEADER) {
                // If we are still in the state of reading headers we need to create a new invalid message that
                // signals that the connection was closed before we received the headers.
                out.add(invalidMessage(Unpooled.EMPTY_BUFFER,
                        new PrematureChannelClosureException("Connection closed before received headers")));
                resetNow();
                return;
            }

            // Check if the closure of the connection signifies the end of the content.
            boolean prematureClosure;
            if (isDecodingRequest() || chunked) {
                // The last request did not wait for a response.
                prematureClosure = true;
            } else {
                // Compare the length of the received content and the 'Content-Length' header.
                // If the 'Content-Length' header is absent, the length of the content is determined by the end of the
                // connection, so it is perfectly fine.
                prematureClosure = contentLength() > 0;
            }

            if (!prematureClosure) {
                out.add(LastHttpContent.EMPTY_LAST_CONTENT);
            }
            resetNow();
        }
    }

    @Override
    public void userEventTriggered(ChannelHandlerContext ctx, Object evt) throws Exception {
        if (evt instanceof HttpExpectationFailedEvent) {
            switch (currentState) {
            case READ_FIXED_LENGTH_CONTENT:
            case READ_VARIABLE_LENGTH_CONTENT:
            case READ_CHUNK_SIZE:
                reset();
                break;
            default:
                break;
            }
        }
        super.userEventTriggered(ctx, evt);
    }

    protected boolean isContentAlwaysEmpty(HttpMessage msg) {
        if (msg instanceof HttpResponse) {
            HttpResponse res = (HttpResponse) msg;
            int code = res.status().code();

            // Correctly handle return codes of 1xx.
            //
            // See:
            //     - https://www.w3.org/Protocols/rfc2616/rfc2616-sec4.html Section 4.4
            //     - https://github.com/netty/netty/issues/222
            if (code >= 100 && code < 200) {
                // One exception: Hixie 76 websocket handshake response
                return !(code == 101 && !res.headers().contains(HttpHeaderNames.SEC_WEBSOCKET_ACCEPT)
                         && res.headers().contains(HttpHeaderNames.UPGRADE, HttpHeaderValues.WEBSOCKET, true));
            }

            switch (code) {
            case 204: case 304:
                return true;
            default:
                return false;
            }
        }
        return false;
    }

    /**
     * Returns true if the server switched to a different protocol than HTTP/1.0 or HTTP/1.1, e.g. HTTP/2 or Websocket.
     * Returns false if the upgrade happened in a different layer, e.g. upgrade from HTTP/1.1 to HTTP/1.1 over TLS.
     */
    protected boolean isSwitchingToNonHttp1Protocol(HttpResponse msg) {
        if (msg.status().code() != HttpResponseStatus.SWITCHING_PROTOCOLS.code()) {
            return false;
        }
        String newProtocol = msg.headers().get(HttpHeaderNames.UPGRADE);
        return newProtocol == null ||
                !newProtocol.contains(HttpVersion.HTTP_1_0.text()) &&
                !newProtocol.contains(HttpVersion.HTTP_1_1.text());
    }

    /**
     * Resets the state of the decoder so that it is ready to decode a new message.
     * This method is useful for handling a rejected request with {@code Expect: 100-continue} header.
     */
    public void reset() {
        resetRequested = true;
    }

    private void resetNow() {
        HttpMessage message = this.message;
        this.message = null;
        name = null;
        value = null;
        contentLength = Long.MIN_VALUE;
        lineParser.reset();
        headerParser.reset();
        trailer = null;
        if (!isDecodingRequest()) {
            HttpResponse res = (HttpResponse) message;
            if (res != null && isSwitchingToNonHttp1Protocol(res)) {
                currentState = State.UPGRADED;
                return;
            }
        }

        resetRequested = false;
        currentState = State.SKIP_CONTROL_CHARS;
    }

    private HttpMessage invalidMessage(ByteBuf in, Exception cause) {
        currentState = State.BAD_MESSAGE;

        // Advance the readerIndex so that ByteToMessageDecoder does not complain
        // when we produced an invalid message without consuming anything.
        in.skipBytes(in.readableBytes());

        if (message == null) {
            message = createInvalidMessage();
        }
        message.setDecoderResult(DecoderResult.failure(cause));

        HttpMessage ret = message;
        message = null;
        return ret;
    }

    private HttpContent invalidChunk(ByteBuf in, Exception cause) {
        currentState = State.BAD_MESSAGE;

        // Advance the readerIndex so that ByteToMessageDecoder does not complain
        // when we produced an invalid message without consuming anything.
        in.skipBytes(in.readableBytes());

        HttpContent chunk = new DefaultLastHttpContent(Unpooled.EMPTY_BUFFER);
        chunk.setDecoderResult(DecoderResult.failure(cause));
        message = null;
        trailer = null;
        return chunk;
    }

    private State readHeaders(ByteBuf buffer) {
        final HttpMessage message = this.message;
        final HttpHeaders headers = message.headers();

        AppendableCharSequence line = headerParser.parse(buffer);
        if (line == null) {
            return null;
        }
        if (line.length() > 0) {
            do {
                char firstChar = line.charAtUnsafe(0);
                if (name != null && (firstChar == ' ' || firstChar == '\t')) {
                    //please do not make one line from below code
                    //as it breaks +XX:OptimizeStringConcat optimization
                    String trimmedLine = line.toString().trim();
                    String valueStr = String.valueOf(value);
                    value = valueStr + ' ' + trimmedLine;
                } else {
                    if (name != null) {
                        headers.add(name, value);
                    }
                    splitHeader(line);
                }

                line = headerParser.parse(buffer);
                if (line == null) {
                    return null;
                }
            } while (line.length() > 0);
        }

        // Add the last header.
        if (name != null) {
            headers.add(name, value);
        }

        // reset name and value fields
        name = null;
        value = null;

        // Done parsing initial line and headers. Set decoder result.
        HttpMessageDecoderResult decoderResult = new HttpMessageDecoderResult(lineParser.size, headerParser.size);
        message.setDecoderResult(decoderResult);

        List<String> contentLengthFields = headers.getAll(HttpHeaderNames.CONTENT_LENGTH);
        if (!contentLengthFields.isEmpty()) {
            HttpVersion version = message.protocolVersion();
            boolean isHttp10OrEarlier = version.majorVersion() < 1 || (version.majorVersion() == 1
                    && version.minorVersion() == 0);
            // Guard against multiple Content-Length headers as stated in
            // https://tools.ietf.org/html/rfc7230#section-3.3.2:
            contentLength = HttpUtil.normalizeAndGetContentLength(contentLengthFields,
                    isHttp10OrEarlier, allowDuplicateContentLengths);
            if (contentLength != -1) {
                headers.set(HttpHeaderNames.CONTENT_LENGTH, contentLength);
            }
        }

        if (isContentAlwaysEmpty(message)) {
            HttpUtil.setTransferEncodingChunked(message, false);
            return State.SKIP_CONTROL_CHARS;
        } else if (HttpUtil.isTransferEncodingChunked(message)) {
            if (!contentLengthFields.isEmpty() && message.protocolVersion() == HttpVersion.HTTP_1_1) {
                handleTransferEncodingChunkedWithContentLength(message);
            }
            return State.READ_CHUNK_SIZE;
        } else if (contentLength() >= 0) {
            return State.READ_FIXED_LENGTH_CONTENT;
        } else {
            return State.READ_VARIABLE_LENGTH_CONTENT;
        }
    }

    /**
     * Invoked when a message with both a "Transfer-Encoding: chunked" and a "Content-Length" header field is detected.
     * The default behavior is to remove the Content-Length field, but this method could be overridden
     * to change the behavior (to, e.g., throw an exception and produce an invalid message).
     *

     * See: https://tools.ietf.org/html/rfc7230#section-3.3.3
     *

     *     If a message is received with both a Transfer-Encoding and a
     *     Content-Length header field, the Transfer-Encoding overrides the
     *     Content-Length.  Such a message might indicate an attempt to
     *     perform request smuggling (Section 9.5) or response splitting
     *     (Section 9.4) and ought to be handled as an error.  A sender MUST
     *     remove the received Content-Length field prior to forwarding such
     *     a message downstream.
     *

     * Also see:
     * https://github.com/apache/tomcat/blob/b693d7c1981fa7f51e58bc8c8e72e3fe80b7b773/
     * java/org/apache/coyote/http11/Http11Processor.java#L747-L755
     * https://github.com/nginx/nginx/blob/0ad4393e30c119d250415cb769e3d8bc8dce5186/
     * src/http/ngx_http_request.c#L1946-L1953
     */
    protected void handleTransferEncodingChunkedWithContentLength(HttpMessage message) {
        message.headers().remove(HttpHeaderNames.CONTENT_LENGTH);
        contentLength = Long.MIN_VALUE;
    }

    private long contentLength() {
        if (contentLength == Long.MIN_VALUE) {
            contentLength = HttpUtil.getContentLength(message, -1L);
        }
        return contentLength;
    }

    private LastHttpContent readTrailingHeaders(ByteBuf buffer) {
        AppendableCharSequence line = headerParser.parse(buffer);
        if (line == null) {
            return null;
        }
        LastHttpContent trailer = this.trailer;
        if (line.length() == 0 && trailer == null) {
            // We have received the empty line which signals the trailer is complete and did not parse any trailers
            // before. Just return an empty last content to reduce allocations.
            return LastHttpContent.EMPTY_LAST_CONTENT;
        }

        CharSequence lastHeader = null;
        if (trailer == null) {
            trailer = this.trailer = new DefaultLastHttpContent(Unpooled.EMPTY_BUFFER, validateHeaders);
        }
        while (line.length() > 0) {
            char firstChar = line.charAtUnsafe(0);
            if (lastHeader != null && (firstChar == ' ' || firstChar == '\t')) {
                List<String> current = trailer.trailingHeaders().getAll(lastHeader);
                if (!current.isEmpty()) {
                    int lastPos = current.size() - 1;
                    //please do not make one line from below code
                    //as it breaks +XX:OptimizeStringConcat optimization
                    String lineTrimmed = line.toString().trim();
                    String currentLastPos = current.get(lastPos);
                    current.set(lastPos, currentLastPos + lineTrimmed);
                }
            } else {
                splitHeader(line);
                CharSequence headerName = name;
                if (!HttpHeaderNames.CONTENT_LENGTH.contentEqualsIgnoreCase(headerName) &&
                        !HttpHeaderNames.TRANSFER_ENCODING.contentEqualsIgnoreCase(headerName) &&
                        !HttpHeaderNames.TRAILER.contentEqualsIgnoreCase(headerName)) {
                    trailer.trailingHeaders().add(headerName, value);
                }
                lastHeader = name;
                // reset name and value fields
                name = null;
                value = null;
            }
            line = headerParser.parse(buffer);
            if (line == null) {
                return null;
            }
        }

        this.trailer = null;
        return trailer;
    }

    protected abstract boolean isDecodingRequest();
    protected abstract HttpMessage createMessage(String[] initialLine) throws Exception;
    protected abstract HttpMessage createInvalidMessage();

    private static int getChunkSize(String hex) {
        hex = hex.trim();
        for (int i = 0; i < hex.length(); i ++) {
            char c = hex.charAt(i);
            if (c == ';' || Character.isWhitespace(c) || Character.isISOControl(c)) {
                hex = hex.substring(0, i);
                break;
            }
        }

        return Integer.parseInt(hex, 16);
    }

    private static String[] splitInitialLine(AppendableCharSequence sb) {
        int aStart;
        int aEnd;
        int bStart;
        int bEnd;
        int cStart;
        int cEnd;

        aStart = findNonSPLenient(sb, 0);
        aEnd = findSPLenient(sb, aStart);

        bStart = findNonSPLenient(sb, aEnd);
        bEnd = findSPLenient(sb, bStart);

        cStart = findNonSPLenient(sb, bEnd);
        cEnd = findEndOfString(sb);

        return new String[] {
                sb.subStringUnsafe(aStart, aEnd),
                sb.subStringUnsafe(bStart, bEnd),
                cStart < cEnd? sb.subStringUnsafe(cStart, cEnd) : "" };
    }

    private void splitHeader(AppendableCharSequence sb) {
        final int length = sb.length();
        int nameStart;
        int nameEnd;
        int colonEnd;
        int valueStart;
        int valueEnd;

        nameStart = findNonWhitespace(sb, 0, false);
        for (nameEnd = nameStart; nameEnd < length; nameEnd ++) {
            char ch = sb.charAtUnsafe(nameEnd);
            // https://tools.ietf.org/html/rfc7230#section-3.2.4
            //
            // No whitespace is allowed between the header field-name and colon. In
            // the past, differences in the handling of such whitespace have led to
            // security vulnerabilities in request routing and response handling. A
            // server MUST reject any received request message that contains
            // whitespace between a header field-name and colon with a response code
            // of 400 (Bad Request). A proxy MUST remove any such whitespace from a
            // response message before forwarding the message downstream.
            if (ch == ':' ||
                    // In case of decoding a request we will just continue processing and header validation
                    // is done in the DefaultHttpHeaders implementation.
                    //
                    // In the case of decoding a response we will "skip" the whitespace.
                    (!isDecodingRequest() && isOWS(ch))) {
                break;
            }
        }

        if (nameEnd == length) {
            // There was no colon present at all.
            throw new IllegalArgumentException("No colon found");
        }

        for (colonEnd = nameEnd; colonEnd < length; colonEnd ++) {
            if (sb.charAtUnsafe(colonEnd) == ':') {
                colonEnd ++;
                break;
            }
        }

        name = sb.subStringUnsafe(nameStart, nameEnd);
        valueStart = findNonWhitespace(sb, colonEnd, true);
        if (valueStart == length) {
            value = EMPTY_VALUE;
        } else {
            valueEnd = findEndOfString(sb);
            value = sb.subStringUnsafe(valueStart, valueEnd);
        }
    }

    private static int findNonSPLenient(AppendableCharSequence sb, int offset) {
        for (int result = offset; result < sb.length(); ++result) {
            char c = sb.charAtUnsafe(result);
            // See https://tools.ietf.org/html/rfc7230#section-3.5
            if (isSPLenient(c)) {
                continue;
            }
            if (Character.isWhitespace(c)) {
                // Any other whitespace delimiter is invalid
                throw new IllegalArgumentException("Invalid separator");
            }
            return result;
        }
        return sb.length();
    }

    private static int findSPLenient(AppendableCharSequence sb, int offset) {
        for (int result = offset; result < sb.length(); ++result) {
            if (isSPLenient(sb.charAtUnsafe(result))) {
                return result;
            }
        }
        return sb.length();
    }

    private static boolean isSPLenient(char c) {
        // See https://tools.ietf.org/html/rfc7230#section-3.5
        return c == ' ' || c == (char) 0x09 || c == (char) 0x0B || c == (char) 0x0C || c == (char) 0x0D;
    }

    private static int findNonWhitespace(AppendableCharSequence sb, int offset, boolean validateOWS) {
        for (int result = offset; result < sb.length(); ++result) {
            char c = sb.charAtUnsafe(result);
            if (!Character.isWhitespace(c)) {
                return result;
            } else if (validateOWS && !isOWS(c)) {
                // Only OWS is supported for whitespace
                throw new IllegalArgumentException("Invalid separator, only a single space or horizontal tab allowed," +
                        " but received a '" + c + "' (0x" + Integer.toHexString(c) + ")");
            }
        }
        return sb.length();
    }

    private static int findEndOfString(AppendableCharSequence sb) {
        for (int result = sb.length() - 1; result > 0; --result) {
            if (!Character.isWhitespace(sb.charAtUnsafe(result))) {
                return result + 1;
            }
        }
        return 0;
    }

    private static boolean isOWS(char ch) {
        return ch == ' ' || ch == (char) 0x09;
    }

    private static class HeaderParser implements ByteProcessor {
        private final AppendableCharSequence seq;
        private final int maxLength;
        int size;

        HeaderParser(AppendableCharSequence seq, int maxLength) {
            this.seq = seq;
            this.maxLength = maxLength;
        }

        public AppendableCharSequence parse(ByteBuf buffer) {
            final int oldSize = size;
            seq.reset();
            int i = buffer.forEachByte(this);
            if (i == -1) {
                size = oldSize;
                return null;
            }
            buffer.readerIndex(i + 1);
            return seq;
        }

        public void reset() {
            size = 0;
        }

        @Override
        public boolean process(byte value) throws Exception {
            char nextByte = (char) (value & 0xFF);
            if (nextByte == HttpConstants.LF) {
                int len = seq.length();
                // Drop CR if we had a CRLF pair
                if (len >= 1 && seq.charAtUnsafe(len - 1) == HttpConstants.CR) {
                    -- size;
                    seq.setLength(len - 1);
                }
                return false;
            }

            increaseCount();

            seq.append(nextByte);
            return true;
        }

        protected final void increaseCount() {
            if (++ size > maxLength) {
                // TODO: Respond with Bad Request and discard the traffic
                //    or close the connection.
                //       No need to notify the upstream handlers - just log.
                //       If decoding a response, just throw an exception.
                throw newException(maxLength);
            }
        }

        protected TooLongFrameException newException(int maxLength) {
            return new TooLongFrameException("HTTP header is larger than " + maxLength + " bytes.");
        }
    }

    private final class LineParser extends HeaderParser {

        LineParser(AppendableCharSequence seq, int maxLength) {
            super(seq, maxLength);
        }

        @Override
        public AppendableCharSequence parse(ByteBuf buffer) {
            // Suppress a warning because HeaderParser.reset() is supposed to be called
            reset();    // lgtm[java/subtle-inherited-call]
            return super.parse(buffer);
        }

        @Override
        public boolean process(byte value) throws Exception {
            if (currentState == State.SKIP_CONTROL_CHARS) {
                char c = (char) (value & 0xFF);
                if (Character.isISOControl(c) || Character.isWhitespace(c)) {
                    increaseCount();
                    return true;
                }
                currentState = State.READ_INITIAL;
            }
            return super.process(value);
        }

        @Override
        protected TooLongFrameException newException(int maxLength) {
            return new TooLongFrameException("An HTTP line is larger than " + maxLength + " bytes.");
        }
    }
}


Instruction:
作为 Java 安全专家，检测此代码中的安全漏洞：
## 内容1
### 文件路径：
omod/src/main/webapp/pages/userApp.gsp
### 代码内容：
<%
    ui.decorateWith("appui", "standardEmrPage", [ title: ui.message("referenceapplication.app.userApp."+param.action[0]) ])

    ui.includeJavascript("referenceapplication", "userApp.js");
%>

${ ui.message("referenceapplication.app.userApp."+param.action[0])}

<form class="simple-form-ui" method="POST" action="userApp.page">

        ${ui.message("referenceapplication.app.errors.invalidJson")}

        ${ui.message("referenceapplication.app.errors.serverError")}

    <input type="hidden" name="action" value="${param.action[0]}" />

        <%if(param.action[0] == 'edit'){%>

        ${ui.message("referenceapplication.app.appId.label")}:
         ${ui.escapeHtml(userApp.appId)}
        <input class="form-control form-control-sm form-control-lg form-control-md" id="appId-field-hidden" type="hidden" name="appId" value="${userApp.appId ? userApp.appId : ""}" />
        <%} else{%>

                ${ui.message("referenceapplication.app.appId.label")} (${ ui.message("coreapps.formValidation.messages.requiredField.label") })

        <input class="form-control form-control-sm form-control-lg form-control-md required" id="appId-field" type="text" name="appId" value="${userApp.appId ? ui.escapeJs(ui.escapeHtml(userApp.appId)) : ""}" size="80" placeholder="${ ui.message("referenceapplication.app.definition.placeholder") }" />
        <%}%>

            ${ui.message("referenceapplication.app.definition.label")} (${ ui.message("coreapps.formValidation.messages.requiredField.label") })

        <textarea class="form-control form-control-sm form-control-lg form-control-md required" id="json-field" name="json" rows="15" cols="80">${userApp.json ? userApp.json : ""}</textarea>

    <input type="button" class="cancel" value="${ ui.message("general.cancel") }" onclick="javascript:window.location='/${ contextPath }/referenceapplication/manageApps.page'" />
    <input type="submit" class="confirm right" id="save-button" value="${ ui.message("general.save") }" disabled="disabled" />
</form>

Output:
【漏洞类型】跨站脚本攻击（XSS）
【严重性】High
【漏洞摘要】原始代码中使用了 `ui.escapeJs(ui.escapeHtml(userApp.appId))` 来处理用户输入的 `appId`，但实际上是多余的，因为 `ui.escapeHtml` 已经对 HTML 特殊字符进行了转义。问题在于 `ui.escapeJs` 的使用可能导致对 JavaScript 的不充分转义，从而允许潜在的 XSS 攻击。具体问题行是 `<input class="form-control form-control-sm form-control-lg form-control-md required" id="appId-field" type="text" name="appId" value="${userApp.appId ? ui.escapeJs(ui.escapeHtml(userApp.appId)) : ""}" size="80" placeholder="${ ui.message("referenceapplication.app.definition.placeholder") }" />`。
【关键代码模式】`ui.escapeJs`、`ui.escapeHtml`、`param.action[0]`、`userApp.appId`
【修复方法说明】修复方法通过将 `ui.escapeJs` 替换为 `ui.encodeJavaScript` 来确保对 JavaScript 的正确转义，从而防止 XSS 攻击。最佳实践是使用专门的函数来处理不同类型的输出转义，以确保所有的用户输入都被正确处理。