LoadRunner截取字符串操作

LoadRunner截取字符串操作



在使用LoadRunner winsockets协议写脚本，遇到下面问题：

在接收到的查询数据库的结果中我要取红色部份用于下面的select

recv buf60 769
 "x01x00x00x01"
 "K"
 "x00x00x02x03"
 "def	system_db
"
 "tb_tsbinfo
"
 "tb_tsbinfofTskGuidebookfTskGuidebookf?"
 "x00"
 "v"
 "x00x00x00x03"
 " "
 "x00x00x00x00"
 "A"
 "x00x00x03x03"
 "def	system_db
"
 "tb_tsbinfo
"
 "tb_tsbinfo"
 "x07"
 "Work_ID"
 "x07"
 "Work_IDf?"
 "x00"
 "v"
 "x00x00x00x03x00x00x00x00x00"
 "G"
 "x00x00x04x03"
 "def	system_db
"
 "tb_tsbinfo
"
 "tb_tsbinfo
"
 "WorkNum_ID
"
 "WorkNum_IDf?"
 "x00"
 "v"
 "x00x00x00x03x00x00x00x00x00"
 "I"
 "x00x00x05x03"
 "def	system_db"
 "x10"
 "tb_tskdetailinfo"
 "x10"
 "tb_tskdetailinfoBatch ID"
 "x02"
 "IDf?"
 "x00"
 "v"
 "x00x00x00x03"
 "!"
 "x00x00x00x00"
 "Q"
 "x00x00x06x03"
 "def	system_db"
 "x10"
 "tb_tskdetailinfo"
 "x10"
 "tb_tskdetailinfo	BatchName	BatchNamef!"
 "x00"
 ","
 "x01x00x00xfdx00x00x00x00x00"
 "C"
 "x00x00x07x03"
 "def	system_db
"
 "tb_tsbinfo
"
 "tb_tsbinfoBlock_IDBlock_IDf?"
 "x00"
 "v"
 "x00x00x00x03x00x00x00x00x00"
 "I"
 "x00x00"
 ""
 "x03"
 "def	system_dbftb_blockinfoftb_blockinfo	BlockName	BlockNamef!"
 "x00x96x00x00x00xfdx00x00x00x00x00"
 "G"
 "x00x00"
 "	"
 "x03"
 "def	system_dbftb_blockinfoftb_blockinfoModel_IDModel_IDf?"
 "x00"
 "v"
 "x00x00x00x03x00x00x00x00x00x05x00x00"
 "
"
 "xfex00x00"
 """
 "x00x15x00x00"
 "v"
 "x01"
 "5"
 "x01"
 "4"
 "x01"
 "7"
 "x01"
 "7"
 "x04"
 "8227"
 "x01"
 "6"
 "x03"
 "DAY"
 "x01"
 "3"
 "x15x00x00"
 "f"
 "x01"
 "5"
 "x01"
 "4"
 "x01"
 "7"
 "x01"
 "7"
 "x04"
 "8227"
 "x01"
 "5"
 "x03"
 "NEW"
 "x01"
 "3"
 "x18x00x00"
 "
"
 "x01"
 "6"
 "x01"
 "1"
 "x01"
 "5"
 "x01"
 "5"
 "x04"
 "0502"
 "x01"
 "4"
 "x06"
 "鏁板瓧"
 "x01"
 "2"
 "x1ax00x00x0ex01"
 "9"
 "x01"
 "1"
 "x02"
 "11"
 "x02"
 "11"
 "x04"
 "1601"
 "x01"
 "4"
 "x06"
 "鏁板瓧"
 "x01"
 "2"
 "x1ax00x00x0fx01"
 "9"
 "x01"
 "1"
 "x02"
 "11"
 "x02"
 "11"
 "x04"
 "1601"
 "x01"
 "1"
 "x06"
 "鍦板潃"
 "x01"
 "2"
 "x05x00x00x10xfex00x00"
 """
 "x00"

send buf61 54
 "2"
 "x00x00x00x03"
 "select `BlockNO` from `tb_blockinfo` where `ID`=6"

写关联语句：

lrs_save_searched_string("socket3",NULL,"Block_ID","LB/BIN=\x01","RB/BIN=\x03",8,0,-1);

执行发现关联的值不对。检查，发现传回的结果为：


 "x01x00x00x01"
 "K"
 "x00x00x02x03"
 "def	system_db
"
 "tb_tsbinfo
"
 "tb_tsbinfofTskGuidebookfTskGuidebookf?"
 "x00"
 "v"
 "x00x00x00x03"
 " "
 "x00x00x00x00"
 "A"
 "x00x00x03x03"
 "def	system_db
"
 "tb_tsbinfo
"
 "tb_tsbinfoaWork_IDaWork_IDf?"
 "x00"
 "v"
 "x00x00x00x03x00x00x00x00x00"
 "G"
 "x00x00x04x03"
 "def	system_db
"
 "tb_tsbinfo
"
 "tb_tsbinfo
"
 "WorkNum_ID
"
 "WorkNum_IDf?"
 "x00"
 "v"
 "x00x00x00x03x00x00x00x00x00"
 "I"
 "x00x00x05x03"
 "def	system_db"
 "x10"
 "tb_tskdetailinfo"
 "x10"
 "tb_tskdetailinfoBatch ID"
 "x02"
 "IDf?"
 "x00"
 "v"
 "x00x00x00x03"
 "!"
 "x00x00x00x00"
 "Q"
 "x00x00x06x03"
 "def	system_db"
 "x10"
 "tb_tskdetailinfo"
 "x10"
 "tb_tskdetailinfo	BatchName	BatchNamef!"
 "x00"
 ","
 "x01x00x00xfdx00x00x00x00x00"
 "C"
 "x00x00"
 "a"
 "x03"
 "def	system_db
"
 "tb_tsbinfo
"
 "tb_tsbinfoBlock_IDBlock_IDf?"
 "x00"
 "v"
 "x00x00x00x03x00x00x00x00x00"
 "I"
 "x00x00"
 ""
 "x03"
 "def	system_dbftb_blockinfoftb_blockinfo	BlockName	BlockNamef!"
 "x00x96x00x00x00xfdx00x00x00x00x00"
 "G"
 "x00x00"
 "	"
 "x03"
 "def	system_dbftb_blockinfoftb_blockinfoModel_IDModel_IDf?"
 "x00"
 "v"
 "x00x00x00x03x00x00x00x00x00x05x00x00"
 "
"
 "xfex00x00"
 """
 "x00x16x00x00"
 "v"
 "x01"
 "2"
 "x01"
 "3"
 "x01"
 "2"
 "x01"
 "2"
 "x04"
 "8227"
 "x02"
 "10"
 "x03"
 "TWO"
 "x01"
 "4"
 "x15x00x00"
 "f"
 "x01"
 "2"
 "x01"
 "3"
 "x01"
 "2"
 "x01"
 "2"
 "x04"
 "8227"
 "x01"
 "9"
 "x03"
 "ONE"
 "x01"
 "4"
 "x18x00x00"
 "
"
 "x01"
 "3"
 "x01"
 "1"
 "x01"
 "1"
 "x01"
 "1"
 "x04"
 "0001"
 "x01"
 "1"
 "x06"
 "鍦板潃"
 "x01"
 "2"
 "x18x00x00x0ex01"
 "3"
 "x01"
 "1"
 "x01"
 "1"
 "x01"
 "1"
 "x04"
 "0001"
 "x01"
 "4"
 "x06"
 "鏁板瓧"
 "x01"
 "2"
 "x05x00x00x0fxfex00x00"
 """
 "x00"
经观查是改变了

在

 "x04"
 "8227"
 "x02"
 "10"
中x04和x02表示的是后面字符的位数，如是一位就是x01，如是三位就是x03。

这个查表返回的结果中有8列，我要取的是第一行第六列的值。

观查后将关联语句改为：

lrs_save_searched_string("socket3",NULL,"Block_ID","LB/BIN=\v","RB/BIN=\r",7,0,-1);

取得结果为：

x012x013x012x012x048227x0210x03TWOx014x15x00x00fx012x013x012x012x048227x019x03ONEx014x18x00x00

我要取得的值在第六个“”后。写语句：

char *Block;
int i;
int k;
int len;//要取值的长度
char Block_str[100];
char Block_len[5];
Block=lr_eval_string("<Block_ID>");

for(k=1;k<=6;)
 {
  i=i+1;

  if(Block[i]=='x')

   k=k+1;
 }

strncpy(Block_len,Block+i-1,4);

lrs_hex_string_to_int(Block_len,1,&len);

strncpy(Block_str,Block+i+3,s);
lr_output_message ("Block= %s",Block_str);

取得想要的结果。整理脚本如下：

char *Block;
int i;
int k;
int len;//要取值的长度
char Block_str[100];
char Block_len[5];

lrs_save_searched_string("socket3",NULL,"Block_ID","LB/BIN=\v","RB/BIN=\r",7,0,-1);
Block=lr_eval_string("<Block_ID>");

//取得第六个x的位置

for(k=1;k<=6;)
 {
  i=i+1;

  if(Block[i]=='x')

   k=k+1;
 }

strncpy(Block_len,Block+i-1,4);//截/x开始四位

lrs_hex_string_to_int(Block_len,1,&len);//转为int

strncpy(Block_str,Block+i+3,s);
lr_output_message ("Block= %s",Block_str);

在往下的脚本编写过程中发现还需要类似的工作，直接写了个函数，如下：

//str,被查找的字符串；n,第几个;c查找的字符
char *strn(char *str,int n,char c){
 int nlen;//要截取串的长度，十进制数
 char rstr[30]="";//截取出的串
 char *retu=NULL;//要返回的值
 char str_nlen[5]="";//要截取串的长度，字符
 int len=0;//str长度
 int i=0;//第几位，计数
 int k=1;//第几个，计数

// lr_output_message ("str= %s",str);
 len=strlen(str);//取得str的长度
 //查找第n个X的位置
 for(k=1;k<=n;)
  {
   i=i+1;
   if(str[i]==c)//判断字符是否为c
    k=k+1;
   if(i+3>len)
    return 0;//找到末尾条件还是不满足，返回空
  }

 strncpy(str_nlen,str+i-1,4);//截取x0n,即我们所要取的值的长度，字符串

// lr_output_message ("str_nlen= %s",str_nlen);

 lrs_hex_string_to_int(str_nlen,1,&nlen);//将str_len转为十进制数，放入len 中

// lr_output_message ("要截取的长度为= %d",nlen);

 strncpy(rstr,str+i+3,nlen);//截取我们所需要的数据

// lr_output_message ("rstr为= %s",rstr);

 retu=rstr;

 return retu;
}





说一下strncpy函数，有两种格式

char *strncpy(char *dest, char *src, int n);

char *strncpy( strtemp,str+n , m )

--strtemp字符串变量,截取后的字符串存放处

--str 字符串变量,要截取的字符串

--n ,int 型,

-- str+n, 表示从第n 位开始截取字符串

--m,int型,表示截取m位