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im-common
Commit 7c4957b8 authored by yanglbme's avatar yanglbme Committed by Yang Libin
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feat: add util package and response models

parent a8e85bc9
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pom.xml
View file @ 7c4957b8
...@@ -7,6 +7,36 @@ ...@@ -7,6 +7,36 @@
<groupId>com.qcloud</groupId> <groupId>com.qcloud</groupId>
<artifactId>im-server-sdk-java</artifactId> <artifactId>im-server-sdk-java</artifactId>
<version>1.0-SNAPSHOT</version> <version>1.0-SNAPSHOT</version>
<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<configuration>
<source>8</source>
<target>8</target>
</configuration>
</plugin>
</plugins>
</build>
<dependencies>
<dependency>
<groupId>org.json</groupId>
<artifactId>json</artifactId>
<version>20210307</version>
</dependency>
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-databind</artifactId>
<version>2.12.4</version>
</dependency>
<dependency>
<groupId>org.apache.commons</groupId>
<artifactId>commons-lang3</artifactId>
<version>3.12.0</version>
</dependency>
</dependencies>
</project> </project>
src/main/java/com/qcloud/im/model/request/GenericRequest.java 0 → 100644
View file @ 7c4957b8
package com.qcloud.im.model.request;
/**
* @author bingo
* @since 2021/7/27 15:47
*/
public abstract class GenericRequest {
}
src/main/java/com/qcloud/im/model/response/AccountCheckResult.java 0 → 100644
View file @ 7c4957b8
package com.qcloud.im.model.response;
import com.fasterxml.jackson.annotation.JsonProperty;
import java.util.List;
/**
* @author bingo
* @since 2021/7/27 15:59
*/
public class AccountCheckResult extends GenericResult {
@JsonProperty("ResultItem")
private List<AccountCheckResultItem> resultItems;
public List<AccountCheckResultItem> getResultItems() {
return resultItems;
}
public void setResultItems(List<AccountCheckResultItem> resultItems) {
this.resultItems = resultItems;
}
}
src/main/java/com/qcloud/im/model/response/AccountCheckResultItem.java 0 → 100644
View file @ 7c4957b8
package com.qcloud.im.model.response;
import com.fasterxml.jackson.annotation.JsonProperty;
/**
* @author bingo
* @since 2021/7/27 16:24
*/
public class AccountCheckResultItem {
@JsonProperty("ResultCode")
private Integer resultCode;
@JsonProperty("ResultInfo")
private String resultInfo;
@JsonProperty("UserID")
private String userId;
@JsonProperty("AccountStatus")
private String accountStatus;
public Integer getResultCode() {
return resultCode;
}
public void setResultCode(Integer resultCode) {
this.resultCode = resultCode;
}
public String getResultInfo() {
return resultInfo;
}
public void setResultInfo(String resultInfo) {
this.resultInfo = resultInfo;
}
public String getUserId() {
return userId;
}
public void setUserId(String userId) {
this.userId = userId;
}
public String getAccountStatus() {
return accountStatus;
}
public void setAccountStatus(String accountStatus) {
this.accountStatus = accountStatus;
}
}
src/main/java/com/qcloud/im/model/response/AccountDeleteResult.java 0 → 100644
View file @ 7c4957b8
package com.qcloud.im.model.response;
import com.fasterxml.jackson.annotation.JsonProperty;
import java.util.List;
/**
* @author bingo
* @since 2021/7/28 11:04
*/
public class AccountDeleteResult extends GenericResult {
@JsonProperty("ResultItem")
private List<AccountDeleteResultItem> resultItems;
public List<AccountDeleteResultItem> getResultItems() {
return resultItems;
}
public void setResultItems(List<AccountDeleteResultItem> resultItems) {
this.resultItems = resultItems;
}
}
src/main/java/com/qcloud/im/model/response/AccountDeleteResultItem.java 0 → 100644
View file @ 7c4957b8
package com.qcloud.im.model.response;
import com.fasterxml.jackson.annotation.JsonProperty;
/**
* @author bingo
* @since 2021/7/28 11:04
*/
public class AccountDeleteResultItem {
@JsonProperty("ResultCode")
private Integer resultCode;
@JsonProperty("ResultInfo")
private String resultInfo;
@JsonProperty("UserID")
private String userId;
public Integer getResultCode() {
return resultCode;
}
public void setResultCode(Integer resultCode) {
this.resultCode = resultCode;
}
public String getResultInfo() {
return resultInfo;
}
public void setResultInfo(String resultInfo) {
this.resultInfo = resultInfo;
}
public String getUserId() {
return userId;
}
public void setUserId(String userId) {
this.userId = userId;
}
}
src/main/java/com/qcloud/im/model/response/AccountImportResult.java 0 → 100644
View file @ 7c4957b8
package com.qcloud.im.model.response;
/**
* @author bingo
* @since 2021/7/28 11:02
*/
public class AccountImportResult extends GenericResult {
}
src/main/java/com/qcloud/im/model/response/GenericResult.java 0 → 100644
View file @ 7c4957b8
package com.qcloud.im.model.response;
import com.fasterxml.jackson.annotation.JsonProperty;
/**
* @author bingo
* @since 2021/7/27 15:43
*/
public abstract class GenericResult {
/**
* 请求处理的结果，OK 表示处理成功，FAIL 表示失败，如果为 FAIL，ErrorInfo 带上失败原因
*/
@JsonProperty("ActionStatus")
private String actionStatus;
/**
* 失败原因
*/
@JsonProperty("ErrorInfo")
private String errorInfo;
/**
* 错误码，0为成功，其他为失败，错误码表：https://cloud.tencent.com/document/product/269/1671
*/
@JsonProperty("ErrorCode")
private String errorCode;
public String getActionStatus() {
return actionStatus;
}
public void setActionStatus(String actionStatus) {
this.actionStatus = actionStatus;
}
public String getErrorInfo() {
return errorInfo;
}
public void setErrorInfo(String errorInfo) {
this.errorInfo = errorInfo;
}
public String getErrorCode() {
return errorCode;
}
public void setErrorCode(String errorCode) {
this.errorCode = errorCode;
}
}
src/main/java/com/qcloud/im/model/response/KickResult.java 0 → 100644
View file @ 7c4957b8
package com.qcloud.im.model.response;
/**
* @author bingo
* @since 2021/7/28 11:07
*/
public class KickResult extends GenericResult {
}
src/main/java/com/qcloud/im/model/response/MultiAccountImportResult.java 0 → 100644
View file @ 7c4957b8
package com.qcloud.im.model.response;
import com.fasterxml.jackson.annotation.JsonProperty;
import java.util.List;
/**
* @author bingo
* @since 2021/7/27 16:00
*/
public class MultiAccountImportResult extends GenericResult {
@JsonProperty("FailAccounts")
private List<String> failAccounts;
public List<String> getFailAccounts() {
return failAccounts;
}
public void setFailAccounts(List<String> failAccounts) {
this.failAccounts = failAccounts;
}
}
src/main/java/com/qcloud/im/model/response/QueryStateErrorItem.java 0 → 100644
View file @ 7c4957b8
package com.qcloud.im.model.response;
import com.fasterxml.jackson.annotation.JsonProperty;
/**
* @author bingo
* @since 2021/7/28 11:11
*/
public class QueryStateErrorItem {
@JsonProperty("To_Account")
private String toAccount;
@JsonProperty("ErrorCode")
private Integer errorCode;
public String getToAccount() {
return toAccount;
}
public void setToAccount(String toAccount) {
this.toAccount = toAccount;
}
public Integer getErrorCode() {
return errorCode;
}
public void setErrorCode(Integer errorCode) {
this.errorCode = errorCode;
}
}
src/main/java/com/qcloud/im/model/response/QueryStateResult.java 0 → 100644
View file @ 7c4957b8
package com.qcloud.im.model.response;
import com.fasterxml.jackson.annotation.JsonProperty;
import java.util.List;
/**
* @author bingo
* @since 2021/7/28 11:07
*/
public class QueryStateResult extends GenericResult {
@JsonProperty("QueryStateResult")
private List<QueryStateResultItem> queryStateResult;
@JsonProperty("QueryStateErrorList")
private List<QueryStateErrorItem> queryStateErrorList;
public List<QueryStateResultItem> getQueryStateResult() {
return queryStateResult;
}
public void setQueryStateResult(List<QueryStateResultItem> queryStateResult) {
this.queryStateResult = queryStateResult;
}
public List<QueryStateErrorItem> getQueryStateErrorList() {
return queryStateErrorList;
}
public void setQueryStateErrorList(List<QueryStateErrorItem> queryStateErrorList) {
this.queryStateErrorList = queryStateErrorList;
}
}
src/main/java/com/qcloud/im/model/response/QueryStateResultItem.java 0 → 100644
View file @ 7c4957b8
package com.qcloud.im.model.response;
import com.fasterxml.jackson.annotation.JsonProperty;
/**
* @author bingo
* @since 2021/7/28 11:10
*/
public class QueryStateResultItem {
@JsonProperty("To_Account")
private String toAccount;
@JsonProperty("Status")
private String status;
public String getToAccount() {
return toAccount;
}
public void setToAccount(String toAccount) {
this.toAccount = toAccount;
}
public String getStatus() {
return status;
}
public void setStatus(String status) {
this.status = status;
}
}
src/main/java/com/qcloud/im/model/response/SendMsgResult.java 0 → 100644
View file @ 7c4957b8
package com.qcloud.im.model.response;
import com.fasterxml.jackson.annotation.JsonProperty;
/**
* @author bingo
* @since 2021/7/27 15:49
*/
public class SendMsgResult extends GenericResult {
@JsonProperty("MsgTime")
private Integer msgTime;
@JsonProperty("MsgKey")
private String msgKey;
public Integer getMsgTime() {
return msgTime;
}
public void setMsgTime(Integer msgTime) {
this.msgTime = msgTime;
}
public String getMsgKey() {
return msgKey;
}
public void setMsgKey(String msgKey) {
this.msgKey = msgKey;
}
}
src/main/java/com/qcloud/im/util/Base64Util.java 0 → 100644
View file @ 7c4957b8
package com.qcloud.im.util;
import java.util.Base64;
/**
* @author bingo
* @since 2021/7/26 16:43
*/
public class Base64Util {
public static byte[] encodeUrl(byte[] input) {
byte[] base64 = Base64.getEncoder().encode(input);
for (int i = 0; i < base64.length; ++i) {
switch (base64[i]) {
case '+':
base64[i] = '*';
break;
case '/':
base64[i] = '-';
break;
case '=':
base64[i] = '_';
break;
default:
break;
}
}
return base64;
}
}
src/main/java/com/qcloud/im/util/JsonUtil.java 0 → 100644
View file @ 7c4957b8
package com.qcloud.im.util;
import com.fasterxml.jackson.annotation.JsonInclude;
import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.databind.DeserializationFeature;
import com.fasterxml.jackson.databind.MapperFeature;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.SerializationFeature;
import org.apache.commons.lang3.SerializationException;
import java.io.IOException;
/**
* JSON工具类
*
* @author bingo
* @since 2021/7/27 17:41
*/
public class JsonUtil {
public static final ObjectMapper OBJECT_MAPPER = new ObjectMapper();
public static final ObjectMapper INDENT_OUTPUT_OBJECT_MAPPER = new ObjectMapper();
static {
OBJECT_MAPPER.enable(MapperFeature.USE_GETTERS_AS_SETTERS);
OBJECT_MAPPER.enable(MapperFeature.ALLOW_FINAL_FIELDS_AS_MUTATORS);
OBJECT_MAPPER.disable(SerializationFeature.FAIL_ON_EMPTY_BEANS);
OBJECT_MAPPER.disable(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES);
INDENT_OUTPUT_OBJECT_MAPPER.disable(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES);
INDENT_OUTPUT_OBJECT_MAPPER.enable(SerializationFeature.INDENT_OUTPUT);
INDENT_OUTPUT_OBJECT_MAPPER.setSerializationInclusion(JsonInclude.Include.NON_NULL);
}
private JsonUtil() {
}
public static String obj2Str(Object object) {
String str = "";
try {
str = OBJECT_MAPPER.writeValueAsString(object);
} catch (JsonProcessingException e) {
e.printStackTrace();
}
return str;
}
public static <T> T str2Obj(String str, Class<T> cls) {
T object = null;
try {
object = OBJECT_MAPPER.readValue(str, cls);
} catch (IOException e) {
e.printStackTrace();
}
return object;
}
public static void writeValueWithoutNullValue(Object object) {
try {
if (null != object) {
INDENT_OUTPUT_OBJECT_MAPPER.writeValueAsString(object);
}
} catch (IOException e) {
throw new SerializationException(e);
}
}
}
src/main/java/com/qcloud/im/util/SigUtil.java 0 → 100644
View file @ 7c4957b8
package com.qcloud.im.util;
import org.json.JSONObject;
import javax.crypto.Mac;
import javax.crypto.spec.SecretKeySpec;
import java.nio.charset.StandardCharsets;
import java.security.InvalidKeyException;
import java.security.NoSuchAlgorithmException;
import java.util.Arrays;
import java.util.Base64;
import java.util.zip.Deflater;
/**
* @author bingo
* @since 2021/7/26 16:39
*/
public class SigUtil {
private final long sdkAppId;
private final String key;
public SigUtil(long sdkAppId, String key) {
this.sdkAppId = sdkAppId;
this.key = key;
}
/**
* 【功能说明】用于签发 TRTC 和 IM 服务中必须要使用的 UserSig 鉴权票据
* <p>
* 【参数说明】
*
* @param userid - 用户id，限制长度为32字节，只允许包含大小写英文字母（a-zA-Z）、数字（0-9）及下划线和连词符。
* @param expire - UserSig 票据的过期时间，单位是秒，比如 86400 代表生成的 UserSig 票据在一天后就无法再使用了。
* @return usersig -生成的签名
*/
public String genUserSig(String userid, long expire) {
return genUserSig(userid, expire, null);
}
/**
* 【功能说明】
* 用于签发 TRTC 进房参数中可选的 PrivateMapKey 权限票据。
* PrivateMapKey 需要跟 UserSig 一起使用，但 PrivateMapKey 比 UserSig 有更强的权限控制能力：
* - UserSig 只能控制某个 UserID 有无使用 TRTC 服务的权限，只要 UserSig 正确，其对应的 UserID 可以进出任意房间。
* - PrivateMapKey 则是将 UserID 的权限控制的更加严格，包括能不能进入某个房间，能不能在该房间里上行音视频等等。
* 如果要开启 PrivateMapKey 严格权限位校验，需要在【实时音视频控制台】/【应用管理】/【应用信息】中打开“启动权限密钥”开关。
* <p>
* 【参数说明】
*
* @param userid - 用户id，限制长度为32字节，只允许包含大小写英文字母（a-zA-Z）、数字（0-9）及下划线和连词符。
* @param expire - PrivateMapKey 票据的过期时间，单位是秒，比如 86400 生成的 PrivateMapKey 票据在一天后就无法再使用了。
* @param roomid - 房间号，用于指定该 userid 可以进入的房间号
* @param privilegeMap - 权限位，使用了一个字节中的 8 个比特位，分别代表八个具体的功能权限开关：
* - 第 1 位：0000 0001 = 1，创建房间的权限
* - 第 2 位：0000 0010 = 2，加入房间的权限
* - 第 3 位：0000 0100 = 4，发送语音的权限
* - 第 4 位：0000 1000 = 8，接收语音的权限
* - 第 5 位：0001 0000 = 16，发送视频的权限
* - 第 6 位：0010 0000 = 32，接收视频的权限
* - 第 7 位：0100 0000 = 64，发送辅路（也就是屏幕分享）视频的权限
* - 第 8 位：1000 0000 = 200，接收辅路（也就是屏幕分享）视频的权限
* - privilegeMap == 1111 1111 == 255 代表该 userid 在该 roomid 房间内的所有功能权限。
* - privilegeMap == 0010 1010 == 42 代表该 userid 拥有加入房间和接收音视频数据的权限，但不具备其他权限。
* @return usersig - 生成带userbuf的签名
*/
public String genPrivateMapKey(String userid, long expire, long roomid, long privilegeMap) {
byte[] userbuf = genUserBuf(userid, roomid, expire, privilegeMap, 0, "");
return genUserSig(userid, expire, userbuf);
}
/**
* 【功能说明】
* 用于签发 TRTC 进房参数中可选的 PrivateMapKey 权限票据。
* PrivateMapKey 需要跟 UserSig 一起使用，但 PrivateMapKey 比 UserSig 有更强的权限控制能力：
* - UserSig 只能控制某个 UserID 有无使用 TRTC 服务的权限，只要 UserSig 正确，其对应的 UserID 可以进出任意房间。
* - PrivateMapKey 则是将 UserID 的权限控制的更加严格，包括能不能进入某个房间，能不能在该房间里上行音视频等等。
* 如果要开启 PrivateMapKey 严格权限位校验，需要在【实时音视频控制台】/【应用管理】/【应用信息】中打开“启动权限密钥”开关。
* <p>
* 【参数说明】
*
* @param userid - 用户id，限制长度为32字节，只允许包含大小写英文字母（a-zA-Z）、数字（0-9）及下划线和连词符。
* @param expire - PrivateMapKey 票据的过期时间，单位是秒，比如 86400 生成的 PrivateMapKey 票据在一天后就无法再使用了。
* @param roomstr - 字符串房间号，用于指定该 userid 可以进入的房间号
* @param privilegeMap - 权限位，使用了一个字节中的 8 个比特位，分别代表八个具体的功能权限开关：
* - 第 1 位：0000 0001 = 1，创建房间的权限
* - 第 2 位：0000 0010 = 2，加入房间的权限
* - 第 3 位：0000 0100 = 4，发送语音的权限
* - 第 4 位：0000 1000 = 8，接收语音的权限
* - 第 5 位：0001 0000 = 16，发送视频的权限
* - 第 6 位：0010 0000 = 32，接收视频的权限
* - 第 7 位：0100 0000 = 64，发送辅路（也就是屏幕分享）视频的权限
* - 第 8 位：1000 0000 = 200，接收辅路（也就是屏幕分享）视频的权限
* - privilegeMap == 1111 1111 == 255 代表该 userid 在该 roomid 房间内的所有功能权限。
* - privilegeMap == 0010 1010 == 42 代表该 userid 拥有加入房间和接收音视频数据的权限，但不具备其他权限。
* @return usersig - 生成带userbuf的签名
*/
public String genPrivateMapKeyWithStringRoomID(String userid, long expire, String roomstr, long privilegeMap) {
byte[] userbuf = genUserBuf(userid, 0, expire, privilegeMap, 0, roomstr);
return genUserSig(userid, expire, userbuf);
}
private String hmacsha256(String identifier, long currTime, long expire, String base64Userbuf) {
String contentToBeSigned = "TLS.identifier:" + identifier + "\n"
+ "TLS.sdkappid:" + sdkAppId + "\n"
+ "TLS.time:" + currTime + "\n"
+ "TLS.expire:" + expire + "\n";
if (null != base64Userbuf) {
contentToBeSigned += "TLS.userbuf:" + base64Userbuf + "\n";
}
try {
byte[] byteKey = key.getBytes(StandardCharsets.UTF_8);
Mac hmac = Mac.getInstance("HmacSHA256");
SecretKeySpec keySpec = new SecretKeySpec(byteKey, "HmacSHA256");
hmac.init(keySpec);
byte[] byteSig = hmac.doFinal(contentToBeSigned.getBytes(StandardCharsets.UTF_8));
return (Base64.getEncoder().encodeToString(byteSig)).replaceAll("\\s*", "");
} catch (NoSuchAlgorithmException | InvalidKeyException e) {
return "";
}
}
private String genUserSig(String userid, long expire, byte[] userbuf) {
long currTime = System.currentTimeMillis() / 1000;
JSONObject sigDoc = new JSONObject();
sigDoc.put("TLS.ver", "2.0");
sigDoc.put("TLS.identifier", userid);
sigDoc.put("TLS.sdkappid", sdkAppId);
sigDoc.put("TLS.expire", expire);
sigDoc.put("TLS.time", currTime);
String base64UserBuf = null;
if (null != userbuf) {
base64UserBuf = Base64.getEncoder().encodeToString(userbuf).replaceAll("\\s*", "");
sigDoc.put("TLS.userbuf", base64UserBuf);
}
String sig = hmacsha256(userid, currTime, expire, base64UserBuf);
if (sig.length() == 0) {
return "";
}
sigDoc.put("TLS.sig", sig);
Deflater compressor = new Deflater();
compressor.setInput(sigDoc.toString().getBytes(StandardCharsets.UTF_8));
compressor.finish();
byte[] compressedBytes = new byte[2048];
int compressedBytesLength = compressor.deflate(compressedBytes);
compressor.end();
return (new String(Base64Util.encodeUrl(Arrays.copyOfRange(compressedBytes,
0, compressedBytesLength)))).replaceAll("\\s*", "");
}
public byte[] genUserBuf(String account, long dwAuthID, long dwExpTime,
long dwPrivilegeMap, long dwAccountType, String RoomStr) {
//视频校验位需要用到的字段,按照网络字节序放入buf中
/*
cVer unsigned char/1 版本号，填0
wAccountLen unsigned short /2 第三方自己的帐号长度
account wAccountLen 第三方自己的帐号字符
dwSdkAppid unsigned int/4 sdkappid
dwAuthID unsigned int/4 群组号码
dwExpTime unsigned int/4 过期时间 ，直接使用填入的值
dwPrivilegeMap unsigned int/4 权限位，主播0xff，观众0xab
dwAccountType unsigned int/4 第三方帐号类型
*/
int accountLength = account.length();
int roomStrLength = RoomStr.length();
int offset = 0;
int bufLength = 1 + 2 + accountLength + 20;
if (roomStrLength > 0) {
bufLength = bufLength + 2 + roomStrLength;
}
byte[] userbuf = new byte[bufLength];
// cVer
if (roomStrLength > 0) {
userbuf[offset++] = 1;
} else {
userbuf[offset++] = 0;
}
// wAccountLen
userbuf[offset++] = (byte) ((accountLength & 0xFF00) >> 8);
userbuf[offset++] = (byte) (accountLength & 0x00FF);
// account
for (; offset < 3 + accountLength; ++offset) {
userbuf[offset] = (byte) account.charAt(offset - 3);
}
// dwSdkAppid
userbuf[offset++] = (byte) ((sdkAppId & 0xFF000000) >> 24);
userbuf[offset++] = (byte) ((sdkAppId & 0x00FF0000) >> 16);
userbuf[offset++] = (byte) ((sdkAppId & 0x0000FF00) >> 8);
userbuf[offset++] = (byte) (sdkAppId & 0x000000FF);
// dwAuthId,房间号
userbuf[offset++] = (byte) ((dwAuthID & 0xFF000000) >> 24);
userbuf[offset++] = (byte) ((dwAuthID & 0x00FF0000) >> 16);
userbuf[offset++] = (byte) ((dwAuthID & 0x0000FF00) >> 8);
userbuf[offset++] = (byte) (dwAuthID & 0x000000FF);
// expire，过期时间,当前时间 + 有效期（单位：秒）
long currTime = System.currentTimeMillis() / 1000;
long expire = currTime + dwExpTime;
userbuf[offset++] = (byte) ((expire & 0xFF000000) >> 24);
userbuf[offset++] = (byte) ((expire & 0x00FF0000) >> 16);
userbuf[offset++] = (byte) ((expire & 0x0000FF00) >> 8);
userbuf[offset++] = (byte) (expire & 0x000000FF);
// dwPrivilegeMap，权限位
userbuf[offset++] = (byte) ((dwPrivilegeMap & 0xFF000000) >> 24);
userbuf[offset++] = (byte) ((dwPrivilegeMap & 0x00FF0000) >> 16);
userbuf[offset++] = (byte) ((dwPrivilegeMap & 0x0000FF00) >> 8);
userbuf[offset++] = (byte) (dwPrivilegeMap & 0x000000FF);
// dwAccountType，账户类型
userbuf[offset++] = (byte) ((dwAccountType & 0xFF000000) >> 24);
userbuf[offset++] = (byte) ((dwAccountType & 0x00FF0000) >> 16);
userbuf[offset++] = (byte) ((dwAccountType & 0x0000FF00) >> 8);
userbuf[offset++] = (byte) (dwAccountType & 0x000000FF);
if (roomStrLength > 0) {
// roomStrLen
userbuf[offset++] = (byte) ((roomStrLength & 0xFF00) >> 8);
userbuf[offset++] = (byte) (roomStrLength & 0x00FF);
// roomStr
for (; offset < bufLength; ++offset) {
userbuf[offset] = (byte) RoomStr.charAt(offset - (bufLength - roomStrLength));
}
}
return userbuf;
}
}
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