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mysql_proxy_server.cpp
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#include <stdlib.h>
#include <mysql.h>
#include <mysql/errmsg.h>
#include <sys/types.h> /* See NOTES */
#include <sys/socket.h>
#include <arpa/inet.h>
#include <rpc/des_crypt.h>
#include <unistd.h>
#include <fcntl.h>
#include <errno.h>
#include <pthread.h>
#include <sys/time.h>
#include <sstream>
#include <iostream>
#include <fstream>
#include <queue>
#include "oi_log.h"
#include "oi_cfg.h"
#include "Attr_API.h"
#include "atomic_counter_array.h"
#include "storage.h"
#include "fork_children.h"
#define MYSQL_PROXY_DEFAULT_PORT 34765
#define MYSQL_PROXY_DEFAULT_SPORT "34765"
//error
#define LOG_ERROR(fmt, args...) do { if (stConfig.iLogLevel >= _LOG_ERROR_) Log(&(stConfig.stLog), 2, "[ERR][PID_%d]%s:%d(%s):" fmt, stConfig.pid, __FILE__, __LINE__, __FUNCTION__ , ## args);} while (0)
//warning
#define LOG_WARNING(fmt, args...) do { if (stConfig.iLogLevel >= _LOG_WARNING_) Log(&(stConfig.stLog), 2, "[WARNING][PID_%d]%s:%d(%s):" fmt, stConfig.pid, __FILE__, __LINE__, __FUNCTION__ , ## args);} while (0)
//info
#define LOG_INFO(fmt, args...) do { if (stConfig.iLogLevel >= _LOG_INFO_) Log(&(stConfig.stLog), 2, "[INFO][PID_%d]%s:%d(%s):" fmt, stConfig.pid, __FILE__, __LINE__, __FUNCTION__ , ## args);} while (0)
//debug
#define LOG_DEBUG(fmt, args...) do { if (stConfig.iLogLevel >= _LOG_DEBUG_) Log(&(stConfig.stLog), 2, "[DEBUG][PID_%d]%s:%d(%s):" fmt, stConfig.pid, __FILE__, __LINE__, __FUNCTION__ , ## args);} while (0)
static struct CONFIG
{
char sDBIP[30] ;
char sDBUser[30];
char sDbPwd[20];
char sDBName[20];
int iLogLevel;
LogFile stLog;
char sLogFilePath[256];
char sServerIP[128];
char sServerPort[32];
char sCharset[32];
time_t lCurrentTime;
time_t lLastGetTime;
time_t lForkTime;
atomic_counter stSendBytesCounter;
int iSendBytesLimit;
int iLoopWaitTime;
int iMinInterval;
int iEnaTraficCtrl;
int iShmFd;
int iShmKey;
int iShmMaxKeyLen;
int iCacheValidSeconds;
pid_t pid;
map<string, string> mapAppKeys; // app name to key mappings
} stConfig;
template<typename T> class ConcurrentQueue : public std::queue<T>
{
public:
ConcurrentQueue<T>():queue<T>()
{
pthread_mutex_init(&mutex, NULL);
}
~ConcurrentQueue<T>()
{
pthread_mutex_destroy(&mutex);
}
void Put(T &t)
{
pthread_mutex_lock(&mutex);
queue<T>::push(t);
pthread_mutex_unlock(&mutex);
}
bool Get(T &t)
{
bool result = false;
pthread_mutex_lock(&mutex);
if(queue<T>::size())
{
t = queue<T>::front();
queue<T>::pop();
result = true;
}
pthread_mutex_unlock(&mutex);
return result;
}
private:
pthread_mutex_t mutex;
};
ConcurrentQueue<MYSQL *> vstMySQLPool;
string sMySQLError;
#define PACKET_START_TOKEN "@MyPROXY"
#define PACKET_HEADER_LENGTH 16
#define MAX_REQUEST_PACKET_LENGTH (4096+PACKET_HEADER_LENGTH)
/*
* struct ProxyPacket
* {
* uint64_t start_token; // '@MyPROXY'
* uint64_t length; // including start_token
* pb_message Request
* {
* string appname = 1;
* uint64 sequence = 2;
* uint32 errorno = 3;
* string content = 11;
* }
* Request request;
* };
*/
struct ProxyPacket
{
string appname;
string appkey;
uint64_t sequence;
uint32_t errnum;
string content;
};
/*
* Turn password into DES key
*/
static void passwd2des(char *pw, char *key)
{
int i;
memset (key, 0, 8);
for (i = 0; *pw; ++i)
key[i%8] ^= *pw++ << 1;
des_setparity (key);
}
static string StrToHex(const string &content)
{
char buf[content.length()*2+2];
for(size_t i=0; i<content.length(); i++)
sprintf(buf+i*2, "%02X", content[i]);
return string(buf, content.length()*2);
}
static string HexToStr(const string &hex)
{
size_t newlen = hex.length()/2;
char buf[newlen];
for(size_t i=0; i<newlen; i++)
buf[i] = strtoul(hex.substr(i*2, 2).c_str(), NULL, 16);
return string(buf, newlen);
}
#define max_encrypt_length 512
static string Encrypt(const string &key, const string &content)
{
uint32_t length = content.length();
string source = string((char*)&length, sizeof(uint32_t)) + content;
if(source.length()&0x7)
{
static char spaces[] = " ";
source.append(spaces, 8-source.length()%8);
}
char data[max_encrypt_length];
length = source.length();
string result;
while(length > 0)
{
int left = 0;
if(length > max_encrypt_length)
{
left = length - max_encrypt_length;
length = max_encrypt_length;
}
memcpy(data, source.data()+result.length(), length);
int iRet = ecb_crypt((char*)key.c_str(), data, length, DES_ENCRYPT);
if(DES_FAILED(iRet))
{
Attr_API(2977140, 1);
return string();
}
result.append(data, length);
length = left;
}
return result;
}
static string Decrypt(const string &key, const string &content)
{
char data[max_encrypt_length];
int length = content.length();
string result;
if(length < sizeof(uint32_t))
{
Attr_API(2977142, 1);
return string();
}
while(length > 0)
{
if(length > max_encrypt_length)
{
length = max_encrypt_length;
}
memcpy(data, content.data()+result.length(), length);
int iRet = ecb_crypt((char*)key.c_str(), data, length, DES_DECRYPT);
if(DES_FAILED(iRet))
{
Attr_API(2977141, 1);
return string();
}
result.append(data, length);
length = content.length() - result.length();
}
if(result.length()>sizeof(uint32_t))
{
length = *(uint32_t*)result.data();
if(length+sizeof(uint32_t)<=result.length())
{
return result.substr(sizeof(uint32_t), length);
}
}
Attr_API(2977143, 1);
LOG_ERROR("Decrypt successful, but length (%d) is incorrect.", result.length());
return string();
}
static void SendResponse(int sockfd, ProxyPacket &stRequest, int errornum, const string &content)
{
ProxyPacket stResponse = stRequest;
stResponse.errnum = errornum;
if(errornum==0)
{
stResponse.content = Encrypt(stResponse.appkey, content);
if(stResponse.content.length()==0 && content.length())
{
stResponse.errnum = 2;
stResponse.content = "Encryption failed";
}
}
else
{
stResponse.content = content;
}
KnvNode *tree = KnvNode::NewTree(1);
if(tree==NULL)
{
Attr_API(2973314, 1);
LOG_ERROR("KnvNode::NewTree() failed: %s", KnvNode::GetGlobalErrorMsg());
return;
}
tree->SetFieldStr(1, stResponse.appname.length(), stResponse.appname.data());
tree->SetFieldInt(2, stResponse.sequence);
tree->SetFieldInt(3, stResponse.errnum);
tree->SetFieldStr(11, stResponse.content.length(), stResponse.content.data());
int len = tree->EvaluateSize();
char *rsp = new char[PACKET_HEADER_LENGTH + len];
memcpy(rsp, PACKET_START_TOKEN, 8);
int ret = tree->Serialize(rsp+PACKET_HEADER_LENGTH, len, false);
if(ret<0)
{
Attr_API(2973316, 1);
LOG_ERROR("KnvNode::Serialize() failed: %s", tree->GetErrorMsg());
KnvNode::Delete(tree);
delete []rsp;
return;
}
KnvNode::Delete(tree);
len += PACKET_HEADER_LENGTH;
((uint64_t*)rsp)[1] = len;
atomic_counter_array_add_current_slot(&(stConfig.stSendBytesCounter), (uint32_t)len);
LOG_DEBUG("Sending response, packet length %d, original content length %d, encrypted content length %d.", len, content.length(), stResponse.content.length());
if(send(sockfd, rsp, len, 0)<0)
{
Attr_API(2973317, 1);
LOG_ERROR("Send response failed: errno=%d:%s", errno, strerror(errno));
}
delete []rsp;
}
static MYSQL *InitMySQL()
{
//connect to db
MYSQL *mysql = mysql_init(NULL);
if(mysql==NULL)
{
sMySQLError = "mysql_init failed: ";
sMySQLError += mysql_error(NULL);
printf("%s\n", sMySQLError.c_str());
return NULL;
}
if (mysql_real_connect(mysql, stConfig.sDBIP, stConfig.sDBUser, stConfig.sDbPwd, stConfig.sDBName, 0, NULL, 0) == NULL)
{
sMySQLError = "mysql_real_connect failed: ";
sMySQLError += mysql_error(mysql);
printf("%s\n", sMySQLError.c_str());
mysql_close(mysql);
return NULL;
}
if(stConfig.sCharset[0])
mysql_set_character_set(mysql, stConfig.sCharset);
return mysql;
}
static MYSQL *AllocMySQL()
{
Attr_API(2974016, 1);
MYSQL *mysql = NULL;
if(vstMySQLPool.Get(mysql)) // use recycled fd
{
// report fd_list size
int iNum = 0;
Attr_API_Get(2973318, &iNum);
if(vstMySQLPool.size()>iNum)
Attr_API_Set(2973318, vstMySQLPool.size());
if(mysql)
return mysql;
}
return InitMySQL();
}
static int FreeMySQL(MYSQL *mysql)
{
Attr_API(2974017, 1);
if(mysql)
{
vstMySQLPool.Put(mysql);
}
}
static int RealFreeMySQL(MYSQL *mysql)
{
Attr_API(2974018, 1);
mysql_close(mysql);
}
static int CreateSockAddr(int socket_type, char* sIP, char* sPort, int* iListener)
{
struct sockaddr_in stAddr;
int iListenSocket;
int iReuseAddr = 1;
int iPort = atoi(sPort);
if(iPort==0)
iPort = MYSQL_PROXY_DEFAULT_PORT;
/* Setup internet address information.
This is used with the bind() call */
memset((char *) &stAddr, 0, sizeof(stAddr));
stAddr.sin_family = AF_INET;
stAddr.sin_port = htons(atoi(sPort));
stAddr.sin_addr.s_addr = inet_addr(sIP);
iListenSocket = socket(AF_INET, socket_type, 0);
if (iListenSocket < 0) {
perror("socket");
return -1;
}
if (iListener != NULL)
*iListener = iListenSocket;
setsockopt(iListenSocket, SOL_SOCKET, SO_REUSEADDR, &iReuseAddr,
sizeof(iReuseAddr));
if (bind(iListenSocket, (struct sockaddr *) &stAddr,
sizeof(stAddr)) < 0) {
perror("bind");
close(iListenSocket);
return -1;
}
if (socket_type == SOCK_STREAM) {
listen(iListenSocket, 5); /* Queue up to five connections before
having them automatically rejected. */
}
return iListenSocket;
}
int SetNBlock(int iSock)
{
int iFlags;
iFlags = fcntl(iSock, F_GETFL, 0);
iFlags |= O_NONBLOCK;
iFlags |= O_NDELAY;
fcntl(iSock, F_SETFL, iFlags);
return 0;
}
static int CreateListenSock()
{
int iSock = CreateSockAddr(SOCK_STREAM, stConfig.sServerIP, stConfig.sServerPort, NULL);
if(iSock < 0)
return -1;
int iOn = 1;
int iRet = setsockopt(iSock, SOL_SOCKET, SO_KEEPALIVE, (char *)&iOn, sizeof(iOn));
if(iRet == -1)
{
perror("setsockopt");
close(iSock);
return -1;
}
SetNBlock(iSock);
return iSock;
}
int LoadKeyFile(const char *sKeyFile)
{
try {
printf("Loading key mapping from file %s.\n", sKeyFile);
ifstream ifs(sKeyFile, std::ifstream::in);
if(ifs.is_open())
{
char line[10240];
while(1)
{
line[0] = 0;
ifs.getline(line, sizeof(line));
if(line[0])
{
char *pstr = line;
while(isspace(*pstr))
pstr ++;
if(*pstr=='#')
{
continue;
}
string appname, appkey;
while(*pstr && !isspace(*pstr) && *pstr!='#')
{
appname.append(string(pstr, 1));
pstr ++;
}
if(*pstr==0 || *pstr=='#')
{
printf("Warning: app name %s has no key!\n", appname.c_str());
}
else
{
while(isspace(*pstr))
pstr ++;
while(*pstr && !isspace(*pstr) && *pstr!='#')
{
appkey.append(string(pstr, 1));
pstr ++;
}
}
printf("Got one app: %s - %s.\n", appname.c_str(), appkey.c_str());
char key[8];
passwd2des((char*)appkey.c_str(), key);
stConfig.mapAppKeys[appname].assign(key, 8);
}
else
{
if(!ifs.good())
break;
}
}
return stConfig.mapAppKeys.size();
}
else
{
printf("Failed to open faile %s\n", sKeyFile);
return -1;
}
}
catch (ios_base::failure &f)
{
printf("Failed to open faile %s: %s\n", sKeyFile, f.what());
return -1;
}
}
int ProxyInit(int argc, char *argv[])
{
char sConfFilePath[255]={0};
if(argc > 2)
{
printf("Usage: %s Config_file\n", argv[0]);
return -1;
}
else if(argc == 2)
{
strncpy(sConfFilePath, argv[1], sizeof(sConfFilePath)-1);
}
else
{
strncpy(sConfFilePath, "/home/oicq/mysql_proxy/conf/mysql_proxy_server.conf", sizeof(sConfFilePath)-1);
}
stConfig.iShmKey = 0x447755;
int iShmPercentage = 20;
int iShmBlockSize = 4096;
stConfig.iShmMaxKeyLen = 128;
int iChildNum = 1;
stConfig.iCacheValidSeconds = 60;
char sKeyFile[256];
TLib_Cfg_GetConfig(sConfFilePath,
"LOGFILE", CFG_STRING, stConfig.sLogFilePath, "/home/oicq/mysql_proxy/log/mysql_proxy_server", sizeof(stConfig.sLogFilePath),
"KEYFILE", CFG_STRING, sKeyFile, "/home/oicq/mysql_proxy/conf/key_file.txt", sizeof(sKeyFile),
"LOG_LEVEL", CFG_INT, &(stConfig.iLogLevel),5,
"SERVER_IP", CFG_STRING, stConfig.sServerIP, "0.0.0.0", sizeof(stConfig.sServerIP),
"SERVER_PORT", CFG_STRING, stConfig.sServerPort, MYSQL_PROXY_DEFAULT_SPORT, sizeof(stConfig.sServerPort),
"MYSQL_HOST", CFG_STRING, stConfig.sDBIP, "localhost", sizeof(stConfig.sDBIP),
"MYSQL_USER", CFG_STRING, stConfig.sDBUser, "root", sizeof(stConfig.sDBUser),
"MYSQL_PASSWD", CFG_STRING, stConfig.sDbPwd, "", sizeof(stConfig.sDbPwd),
"MYSQL_DB", CFG_STRING, stConfig.sDBName, "mysql_test", sizeof(stConfig.sDBName),
"MYSQL_CHARSET", CFG_STRING, stConfig.sCharset, "utf8", sizeof(stConfig.sCharset),
"SEND_BYTES_LIMIT", CFG_INT, &(stConfig.iSendBytesLimit), 300000000, //默认一秒可以发送300MByte配置
"MIN_INTERVAL",CFG_INT,&(stConfig.iMinInterval), 10, //流量计算的最小时间间隔,1/10秒为单位
"ENA_TRAFIC_CTRL",CFG_INT,&(stConfig.iEnaTraficCtrl), 1, //是否开启流量控制,默认开启
"SHM_KEY", CFG_INT, &stConfig.iShmKey, stConfig.iShmKey, //Shm缓存的key
"SHM_PERCENT", CFG_INT, &iShmPercentage, iShmPercentage, //Shm缓存占用系统内存的百分比
"SHM_BLOCKSIZE", CFG_INT, &iShmBlockSize, iShmBlockSize, //Shm缓存分配的块大小
"SHM_MAX_KEYLEN", CFG_INT, &stConfig.iShmMaxKeyLen, stConfig.iShmMaxKeyLen, //Shm哈希表存储的最大key长度
"CHILD_NUM", CFG_INT, &iChildNum, iChildNum, //工作进程个数
"CACHE_VALID_SECONDS", CFG_INT, &stConfig.iCacheValidSeconds, stConfig.iCacheValidSeconds, //Cache在shm中的有效时间
(void*)NULL
);
if(LoadKeyFile(sKeyFile)<0)
return -1;
if(stConfig.mapAppKeys.size()==0)
{
printf("Key file is empty: %s, the server can not continue without app/key configs.\n", sKeyFile);
return -1;
}
if(stConfig.iShmMaxKeyLen<128)
{
printf("SHM_MAX_KEYLEN of %d is too small, forced to %d.\n", stConfig.iShmMaxKeyLen, 128);
stConfig.iShmMaxKeyLen = 128;
}
//SEND_BYTES_LIMIT做一下限制,免得配错了影响服务
if(stConfig.iSendBytesLimit < 10000000)
stConfig.iSendBytesLimit = 10000000;
if(stConfig.iSendBytesLimit > 500000000)
stConfig.iSendBytesLimit = 500000000;
if(stConfig.iMinInterval > 50) //计算流量的最小时间间隔是10ms,最大时间间隔是1分钟
stConfig.iMinInterval = 50;
printf("SHM_KEY:0x%X\n", (uint32_t)stConfig.iShmKey);
printf("LOG_LEVEL:%d\n", stConfig.iLogLevel);
printf("SEND_BYTES_LIMIT:%d\n", stConfig.iSendBytesLimit);
printf("MIN_INTERVAL:%d\n", stConfig.iMinInterval);
printf("SHM_PERCENT:%d\n", iShmPercentage);
InitLogFile(&stConfig.stLog, stConfig.sLogFilePath, 0, 5, 5000000);
stConfig.iShmFd = UcStorage::InitWrite(stConfig.iShmKey, iShmPercentage, stConfig.iShmMaxKeyLen, 20, 1, iShmBlockSize);
if(stConfig.iShmFd<0)
{
printf("Shm init failed: %s\n", UcStorage::GetInitErrorMsg().c_str());
return -1;
}
if (atomic_counter_array_init(&(stConfig.stSendBytesCounter), stConfig.iShmKey+1, 0) != 0)
{
printf("atomic_counter_init() failed!\n");
return -1;
}
stConfig.stSendBytesCounter.ptr->cIdx = 0;
int iListenFd = CreateListenSock();
if (iListenFd < 0)
{
printf("CreateListenSock Fail: %d:%s\n", errno, strerror(errno));
return -1;
}
//connect to db
MYSQL *pstMySQL = InitMySQL();
if(pstMySQL==NULL)
return -1;
if(iChildNum>1)
{
RealFreeMySQL(pstMySQL);
}
else // single child-mode, can be reuse
{
FreeMySQL(pstMySQL);
}
int iRet = ForkChildren(iChildNum);
if(iRet<0)
{
printf("Fork children failed.\n");
return -1;
}
stConfig.pid = getpid();
return iListenFd;
}
static uint64_t TimeToUsec(const struct timeval *pval)
{
uint64_t ret;
if (pval == NULL) return 0;
ret = pval->tv_sec;
ret = ret * 1000000;
ret += pval->tv_usec;
return ret;
}
static uint64_t SubTime(struct timeval tv1, struct timeval tv2)
{
return TimeToUsec(&tv1) - TimeToUsec(&tv2);
}
static int TrafficCtl(int iUTimePice)
{
int iRet = 0, i = 0;
static struct timeval tvTime[6] = {{0,0},{0,0},{0,0},{0,0},{0,0}};
struct timeval tvNow;
gettimeofday(&tvNow, NULL);
uint32_t dwSendBytes = 0;
uint64_t ullUsec = SubTime(tvNow, tvTime[stConfig.stSendBytesCounter.ptr->cIdx]);
if(ullUsec >= 5000 * (uint64_t)1000000 * iUTimePice)
{
Attr_API(253031,1);
memset(stConfig.stSendBytesCounter.ptr, 0, sizeof(atomic_counter_t)); //发生时间跳变时可能出现再次初始化，上报
for(i = 0; i < 6; ++i)
{
tvTime[i] = tvNow;
}
return 0;
}
if(ullUsec > 1 * (uint64_t)100000 * iUTimePice) //与本时间片计数器进入时间超过一个时间片
{
//更新索引，更新时间戳
atomic_counter_array_set_lastest_slot(&(stConfig.stSendBytesCounter), 0);
stConfig.stSendBytesCounter.ptr->cIdx = (stConfig.stSendBytesCounter.ptr->cIdx + 5) % 6;
tvTime[stConfig.stSendBytesCounter.ptr->cIdx] = tvNow;
}
ullUsec = SubTime(tvNow,tvTime[(stConfig.stSendBytesCounter.ptr->cIdx + 4)%6]); //开始计算流量，此处计算与4个时间片前的计数器时间戳的时间差
if(ullUsec >= 1 * (uint64_t)100000 * iUTimePice)
{
iRet = atomic_counter_array_get_five_slots(&(stConfig.stSendBytesCounter), &dwSendBytes);
// LOG_INFO("PId %d Send Speed:%llu Bytes/s [%u]:[%llu]\n", getpid(), dwSendBytes * (uint64_t)1000000 / ullUsec, dwSendBytes, ullUsec);
// int iSpeed = (int) dwSendBytes * (uint64_t)1000000 / ullUsec;
if(dwSendBytes * (uint64_t)1000000 / ullUsec > (uint64_t)stConfig.iSendBytesLimit)
return 1;
}
return 0;
}
void DoLoop()
{
}
/*
* message ReqResult
* {
* string key = 1; // query sql statement
* uint32 time = 2; // query time
* uint32 num_rows = 3; // mysql_num_rows()
* uint32 num_fields = 4; // mysql_num_fields()
*
* message Fields
* {
* string key = 1; // "fields"
* message Field
* {
* string name = 1;
*
* // future fied info can be added below
* };
* repeated Field field = 11;
* };
* Fields fields = 11;
*
* message Row
* {
* string key = 1; // "row <i>" i = {0,1,2...}
* optional string field_0 = 11; // field_0
* optional string field_1 = 12; // field_1
* // ... ...
* };
*
* // for KNV to work more efficently, we split data rows into sets
* // each set contains up to 10000 rows of data
* message Sets
* {
* string key = 1; // "set_<i>" i= {0,1,2...}
* repeated Row row = 11; // set_0, row 0-9999, set_1, row 10000-19999, ...
* };
*
* repeated Sets sets = 12;
* };
*/
#define max_row_num_for_each_set 10000
static KnvNode *PackResult(MYSQL_RES *result, knv_key_t &reqkey)
{
KnvNode *tree = KnvNode::NewTree(1, &reqkey);
if(tree==NULL)
{
Attr_API(2973314, 1);
sMySQLError = "Create KNV tree failed: ";
sMySQLError += KnvNode::GetGlobalErrorMsg();
return NULL;
}
unsigned int num_rows = mysql_num_rows(result);
unsigned int num_fields = mysql_num_fields(result);
tree->SetFieldInt(2, time(NULL));
tree->SetFieldInt(3, num_rows);
tree->SetFieldInt(4, num_fields);
MYSQL_FIELD *field;
vector<string> fields;
knv_key_t kfields((char*)"fields", 6);
KnvNode *fieldstree = tree->InsertSubNode(11, &kfields);
if(fieldstree==NULL)
{
Attr_API(2973315, 1);
sMySQLError = "Add KNV node failed: ";
sMySQLError += tree->GetErrorMsg();
KnvNode::Delete(tree);
return NULL;
}
while((field = mysql_fetch_field(result)))
{
knv_key_t kfield(field->name, field->name_length);
KnvNode *fieldnode = fieldstree->InsertSubNode(11, &kfield);
if(fieldnode==NULL)
{
Attr_API(2973315, 1);
sMySQLError = "Add KNV node failed: ";
sMySQLError += tree->GetErrorMsg();
KnvNode::Delete(tree);
return NULL;
}
fields.push_back(field->name);
}
MYSQL_ROW row;
KnvNode *settree = NULL;
int r = 0;
while ((row = mysql_fetch_row(result)))
{
char rowname[64];
snprintf(rowname, sizeof(rowname), "row %d", r);
if(settree==NULL)
{
char setname[64];
snprintf(setname, sizeof(setname), "set %d", r/max_row_num_for_each_set);
knv_key_t kset(setname, strlen(setname));
settree = tree->InsertSubNode(12, &kset);
if(settree==NULL)
{
Attr_API(2973315, 1);
sMySQLError = "Add KNV node failed: ";
sMySQLError += tree->GetErrorMsg();
KnvNode::Delete(tree);
return NULL;
}
}
knv_key_t k(rowname, strlen(rowname));
KnvNode *subtree = settree->InsertSubNode(11, &k);
if(subtree==NULL)
{
Attr_API(2973315, 1);
sMySQLError = "Add KNV node failed: ";
sMySQLError += settree->GetErrorMsg();
KnvNode::Delete(tree);
return NULL;
}
unsigned long *lengths = mysql_fetch_lengths(result);
for(int i = 0; i < num_fields; i++)
{
if(row[i])
{
if(lengths)
subtree->AddFieldStr(11+i, lengths[i], row[i]);
else // mysql_fetch_lengths() failed
subtree->AddFieldStr(11+i, strlen(row[i]), row[i]);
}
}
if(r && (r%max_row_num_for_each_set==0))
{
settree->GetValue(); // Fold and delete children objects
settree = NULL; // start a new set
}
r++;
}
//printf("done.\n");
LOG_DEBUG("Rsp data: fields=%d/%d, rows=%d/%d, data_size=%d", num_fields, fields.size(), num_rows, r, tree->EvaluateSize());
return tree;
}
static inline string GetReqHashKey(const char *reqstr, int length)
{
if(length<stConfig.iShmMaxKeyLen-32)
return string(reqstr, length);
else
return string(reqstr, stConfig.iShmMaxKeyLen-32);
}
void ProcessRequest(int sockfd, ProxyPacket &stRequest)
{
string reqstr = Decrypt(stRequest.appkey, stRequest.content);
if(reqstr.length()==0)
{
LOG_INFO("Recv bad request, length=%d.", stRequest.content.length());
sMySQLError = "Unauthorized request";
SendResponse(sockfd, stRequest, 1, sMySQLError);
return;
}
LOG_DEBUG("Recv request: %s.", reqstr.c_str());
// skip spaces
const char *sqlstr = reqstr.c_str();
const char *sql = sqlstr;
while(*sql=='\n'||*sql=='\r'||isspace(*sql))
sql ++;
if(strncasecmp(sql, "select", 6) && strncasecmp(sql, "show", 4) && strncasecmp(sql, "desc", 4))
{
sMySQLError = "statement not starting with SELECT/SHOW/DESC is not supperted.";
SendResponse(sockfd, stRequest, 1, sMySQLError);
LOG_DEBUG("%s", sMySQLError.c_str());
return;
}
int len = reqstr.length() - (sql-sqlstr);
string keystr = GetReqHashKey(sql, len);
knv_key_t key((char*)keystr.data(), keystr.length());
UcStorage st(stConfig.iShmFd, key);
KnvNode *tree = NULL;
if(st.Read()>=0)
{
Attr_API(2974111, 1);
LOG_DEBUG("Got data in cache.");
tree = st.GetDataTree();
time_t t = tree? tree->GetFieldInt(2) : 0;
if(t==0 || t+stConfig.iCacheValidSeconds<time(NULL))
{
LOG_DEBUG("Data in cache is outdated.");
Attr_API(2974110, 1);
tree = NULL;
}
}
else
{
LOG_DEBUG("Get data from cache failed: %s", st.GetErrorMsg().c_str());
}
int try_num = 0, max_try_num = 10;
while(tree==NULL)
{
Attr_API(2974112, 1);
LOG_DEBUG("Getting data from DB.\n");
MYSQL *mysql = AllocMySQL();
if(mysql==NULL)
{
Attr_API(2973330, 1);
SendResponse(sockfd, stRequest, 1, sMySQLError);
LOG_ERROR("AllocMySQL failed: %s", sMySQLError.c_str());
return;
}
int iRet = mysql_query(mysql, sql);
if(iRet<0)
{
Attr_API(2973331, 1);
sMySQLError = "mysql_query failed: ";
sMySQLError += mysql_error(mysql);
int err = mysql_errno(mysql);
LOG_DEBUG("%s, mysql_errno=%d", sMySQLError.c_str(), err);
if(err>=ER_ERROR_FIRST && err<=ER_ERROR_LAST) // server side error, not relavant to socket
{
FreeMySQL(mysql);
}
else
{
RealFreeMySQL(mysql);
}
// if connection is closed by server, try again
if((err==CR_SERVER_GONE_ERROR || err==CR_SERVER_LOST ||
err==CR_CONNECTION_ERROR || err==CR_CONN_HOST_ERROR ||
err==CR_LOCALHOST_CONNECTION || err==CR_TCP_CONNECTION) &&
try_num < max_try_num)
{
try_num ++;
continue;
}
SendResponse(sockfd, stRequest, err, sMySQLError);
return;
}
MYSQL_RES *result = mysql_store_result(mysql);
if (result == NULL)
{
Attr_API(2973335, 1);
sMySQLError = "mysql_store_result failed: ";
sMySQLError += mysql_error(mysql);
int err = mysql_errno(mysql);
LOG_DEBUG("%s, mysql_errno=%d", sMySQLError.c_str(), err);
if(err>=ER_ERROR_FIRST && err<=ER_ERROR_LAST) // client side error, not relavant to socket
{
FreeMySQL(mysql);
}
else
{
RealFreeMySQL(mysql);
}
// if connection is closed by server, try again
if((err==CR_SERVER_GONE_ERROR || err==CR_SERVER_LOST ||
err==CR_CONNECTION_ERROR || err==CR_CONN_HOST_ERROR ||
err==CR_LOCALHOST_CONNECTION || err==CR_TCP_CONNECTION) &&
try_num < max_try_num)
{
try_num ++;
continue;
}
SendResponse(sockfd, stRequest, err, sMySQLError);
return;
}
tree = PackResult(result, key);
mysql_free_result(result);
FreeMySQL(mysql);
if (tree == NULL)
{
Attr_API(2973336, 1);
SendResponse(sockfd, stRequest, CR_OUT_OF_MEMORY, sMySQLError);
LOG_DEBUG("PackResult failed: %s", sMySQLError.c_str());
return;
}
st.Attach(*tree);
if(st.TryLockShm()==0)
{
Attr_API(2973339, 1);
LOG_DEBUG("Wrote data to cache.");
if(st.Write(true)) // enable auto_remove
{
Attr_API(2973344, 1);
LOG_ERROR("Write to cache failed: %s", st.GetErrorMsg().c_str());
}
st.UnlockShm();
}
else
{
LOG_WARNING("TrylockShm failed.");
Attr_API(2973338, 1);
}
}
string rsp = tree->GetStrVal();
if(rsp.length()==0)
{
LOG_ERROR("KNV GetStrVal() failed: %s", tree->GetErrorMsg()? tree->GetErrorMsg() : "NULL");
}
LOG_DEBUG("Sending rsp of %lu bytes.", rsp.length());
SendResponse(sockfd, stRequest, 0, rsp);
}