使用loadrunner进行压力测试——post请求

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注意，在某些破解版的软件中如果更改了runtime_setting可能导致响应时间曲线无法绘制，原因不详

1. 发送post请求时使用web_submit_data 
如：
    web_submit_data("create",//事务名 
          "Action=http://bizhi.sogou.com/diy/", //请求域名
          "Method=POST", //请求类型为post
          "RecContentType=application/json", //返回格式为json
          "Referer=http://bizhi.sogou.com/diy?wp_id=8743",
          "Snapshot=t4.inf",
          "Mode=HTML",
          ITEMDATA, //下面编辑post请求的数据
          "Name=img", "Value=http://dl.bizhi.sogou.com/images/2012/05/3/8743.jpg", ENDITEM, //数据的name、value及结束符
          "Name=left", "Value=60", ENDITEM, //第二条数据的name、value及结束符
          "Name=top", "Value=30", ENDITEM,
          "Name=width", "Value=720", ENDITEM,
          "Name=height", "Value=450", ENDITEM,
          "Name=model", "Value=5/5s", ENDITEM,
          "Name=x", "Value=1", ENDITEM,
          "Name=y", "Value=1", ENDITEM,
          "Name=ofc", "Value=1", ENDITEM,
          "Name=wp_id", "Value=8743", ENDITEM,
          "Name=mat", "Value=ms", ENDITEM,
          "Name=curMode", "Value=normal", ENDITEM,
          LAST);

2. 如果要发送的请求的数据值需要变化，那么需要将请求中的值参数化，，如果是根据上一条请求的返回值来确定请求中的数据值，那么需要对上一条请求的返回值进行解析
如：
 web_submit_data("create",
          "Action=http://bizhi.sogou.com/diy/",
          "Method=POST",
          "RecContentType=application/json",
          "Referer=http://bizhi.sogou.com/diy?wp_id=8743",
          "Snapshot=t4.inf",
          "Mode=HTML",
          ITEMDATA,
          "Name=img", "Value=http://dl.bizhi.sogou.com/images/2012/05/3/8743.jpg", ENDITEM,
          "Name=left", "Value=60", ENDITEM,
          "Name=top", "Value=30", ENDITEM,
          "Name=width", "Value=720", ENDITEM,
          "Name=height", "Value=450", ENDITEM,
          "Name=model", "Value=5/5s", ENDITEM,
          "Name=x", "Value=1", ENDITEM,
          "Name=y", "Value=1", ENDITEM,
          "Name=ofc", "Value=1", ENDITEM,
          "Name=wp_id", "Value=8743", ENDITEM,
          "Name=mat", "Value=ms", ENDITEM,
          "Name=curMode", "Value=normal", ENDITEM,
          LAST);//请求1

     lr_set_debug_message( 16 | 2,0 );
     lr_save_string((char*)strtok(lr_eval_string("{Output}"),","),"temp");//获得请求1的返回数据
     //lr_output_message("bian:%s",lr_eval_string("{temp}"));
     lr_save_string((char*)strtok(NULL,","),"diyid_temp");//解析返回数据
     //lr_output_message("bian2:%s",lr_eval_string("{diyid_temp}"));
     lr_save_string((char*)strtok(lr_eval_string("{diyid_temp}"),":"),"temp");//解析返回数据
     //lr_output_message("bian:%s",lr_eval_string("{temp}"));
     lr_save_string((char*)strtok(NULL,":"),"diyid_temp");//解析返回数据
     //lr_output_message("bian2:%s",lr_eval_string("{diyid_temp}"));
     diyid_str=(char*)strtok(lr_eval_string("{diyid_temp}"),"}");
     lr_save_string((char*)strtok(lr_eval_string("{diyid_temp}"),"}"),"diyid");//解析返回数据
     //lr_output_message("bian:%s",lr_eval_string("{diyid}"));

     strcat(test, diyid_str);
     //lr_output_message("%s",test);
     lr_save_string(CMd5(test),"md5");//计算md5
     //lr_output_message("bianmd5:%s",lr_eval_string("{md5}"));


     web_submit_data("postname",
                "Action=http://bizhi.sogou.com/orderpay/",
                "Method=POST",
                "RecContentType=textml",
                "Mode=HTML",
                ITEMDATA,
                "Name=goods_action","Value=goods_detail",ENDITEM,
                    "Name=goods_addr","Value=656",ENDITEM,
                    "Name=md5str","Value={md5}",ENDITEM,//根据参数构造请求
                    "Name=diy_id","Value={diyid}",ENDITEM,//根据参数构造请求
                    "Name=goods_info","Value=448_1",ENDITEM,
                    "Name=from","Value=diy",ENDITEM,
                    "Name=Accept","Value=text/plain",ENDITEM,
                LAST); 

3.  另附，计算md5，需要添加md5的头文件，并别忘了在gloab.h中include md5.h
#ifndef MD5_H
#define MD5_H
#ifdef __alpha
typedef unsigned int uint32;
#else
typedef unsigned long uint32;
#endif
struct MD5Context {
        uint32 buf[4];
        uint32 bits[2];
        unsigned char in[64];
};
extern void MD5Init();
extern void MD5Update();
extern void MD5Final();
extern void MD5Transform();
typedef struct MD5Context MD5_CTX;
#endif
#ifdef sgi
#define HIGHFIRST
#endif
#ifdef sun
#define HIGHFIRST
#endif
#ifndef HIGHFIRST
#define byteReverse(buf, len)    /* Nothing */
#else
void byteReverse(buf, longs)unsigned char *buf; unsigned longs;
{
    uint32 t;
    do {
    t = (uint32) ((unsigned) buf[3] << 8 | buf[2]) << 16 |((unsigned) buf[1] << 8 | buf[0]);
    *(uint32 *) buf = t;
    buf += 4;
    } while (--longs);
}
#endif
void MD5Init(ctx)struct MD5Context *ctx;
{
    ctx->buf[0] = 0x67452301;
    ctx->buf[1] = 0xefcdab89;
    ctx->buf[2] = 0x98badcfe;
    ctx->buf[3] = 0x10325476;
    ctx->bits[0] = 0;
    ctx->bits[1] = 0;
}
void MD5Update(ctx, buf, len) struct MD5Context *ctx; unsigned char *buf; unsigned len;
{
    uint32 t;
    t = ctx->bits[0];
    if ((ctx->bits[0] = t + ((uint32) len << 3)) < t)
    ctx->bits[1]++;
    ctx->bits[1] += len >> 29;
    t = (t >> 3) & 0x3f;
    if (t) {
    unsigned char *p = (unsigned char *) ctx->in + t;
    t = 64 - t;
    if (len < t) {
        memcpy(p, buf, len);
        return;
    }
    memcpy(p, buf, t);
    byteReverse(ctx->in, 16);
    MD5Transform(ctx->buf, (uint32 *) ctx->in);
    buf += t;
    len -= t;
    }
    while (len >= 64) {
    memcpy(ctx->in, buf, 64);
    byteReverse(ctx->in, 16);
    MD5Transform(ctx->buf, (uint32 *) ctx->in);
    buf += 64;
    len -= 64;
    }
    memcpy(ctx->in, buf, len);
}
void MD5Final(digest, ctx)
    unsigned char digest[16]; struct MD5Context *ctx;
{
    unsigned count;
    unsigned char *p;
    count = (ctx->bits[0] >> 3) & 0x3F;
    p = ctx->in + count;
    *p++ = 0x80;
    count = 64 - 1 - count;
    if (count < 8) {
    memset(p, 0, count);
    byteReverse(ctx->in, 16);
    MD5Transform(ctx->buf, (uint32 *) ctx->in);
    memset(ctx->in, 0, 56);
    } else {
    memset(p, 0, count - 8);
    }
    byteReverse(ctx->in, 14);
    ((uint32 *) ctx->in)[14] = ctx->bits[0];
    ((uint32 *) ctx->in)[15] = ctx->bits[1];
    MD5Transform(ctx->buf, (uint32 *) ctx->in);
    byteReverse((unsigned char *) ctx->buf, 4);
    memcpy(digest, ctx->buf, 16);
    memset(ctx, 0, sizeof(ctx));
}
#define F1(x, y, z) (z ^ (x & (y ^ z)))
#define F2(x, y, z) F1(z, x, y)
#define F3(x, y, z) (x ^ y ^ z)
#define F4(x, y, z) (y ^ (x | ~z))
#define MD5STEP(f, w, x, y, z, data, s) ( w += f(x, y, z) + data,  w = w<<s | w>>(32-s),  w += x )
void MD5Transform(buf, in)
    uint32 buf[4]; uint32 in[16];
{
    register uint32 a, b, c, d;
    a = buf[0];
    b = buf[1];
    c = buf[2];
    d = buf[3];
    MD5STEP(F1, a, b, c, d, in[0] + 0xd76aa478, 7);
    MD5STEP(F1, d, a, b, c, in[1] + 0xe8c7b756, 12);
    MD5STEP(F1, c, d, a, b, in[2] + 0x242070db, 17);
    MD5STEP(F1, b, c, d, a, in[3] + 0xc1bdceee, 22);
    MD5STEP(F1, a, b, c, d, in[4] + 0xf57c0faf, 7);
    MD5STEP(F1, d, a, b, c, in[5] + 0x4787c62a, 12);
    MD5STEP(F1, c, d, a, b, in[6] + 0xa8304613, 17);
    MD5STEP(F1, b, c, d, a, in[7] + 0xfd469501, 22);
    MD5STEP(F1, a, b, c, d, in[8] + 0x698098d8, 7);
    MD5STEP(F1, d, a, b, c, in[9] + 0x8b44f7af, 12);
    MD5STEP(F1, c, d, a, b, in[10] + 0xffff5bb1, 17);
    MD5STEP(F1, b, c, d, a, in[11] + 0x895cd7be, 22);
    MD5STEP(F1, a, b, c, d, in[12] + 0x6b901122, 7);
    MD5STEP(F1, d, a, b, c, in[13] + 0xfd987193, 12);
    MD5STEP(F1, c, d, a, b, in[14] + 0xa679438e, 17);
    MD5STEP(F1, b, c, d, a, in[15] + 0x49b40821, 22);
    MD5STEP(F2, a, b, c, d, in[1] + 0xf61e2562, 5);
    MD5STEP(F2, d, a, b, c, in[6] + 0xc040b340, 9);
    MD5STEP(F2, c, d, a, b, in[11] + 0x265e5a51, 14);
    MD5STEP(F2, b, c, d, a, in[0] + 0xe9b6c7aa, 20);
    MD5STEP(F2, a, b, c, d, in[5] + 0xd62f105d, 5);
    MD5STEP(F2, d, a, b, c, in[10] + 0x02441453, 9);
    MD5STEP(F2, c, d, a, b, in[15] + 0xd8a1e681, 14);
    MD5STEP(F2, b, c, d, a, in[4] + 0xe7d3fbc8, 20);
    MD5STEP(F2, a, b, c, d, in[9] + 0x21e1cde6, 5);
    MD5STEP(F2, d, a, b, c, in[14] + 0xc33707d6, 9);
    MD5STEP(F2, c, d, a, b, in[3] + 0xf4d50d87, 14);
    MD5STEP(F2, b, c, d, a, in[8] + 0x455a14ed, 20);
    MD5STEP(F2, a, b, c, d, in[13] + 0xa9e3e905, 5);
    MD5STEP(F2, d, a, b, c, in[2] + 0xfcefa3f8, 9);
    MD5STEP(F2, c, d, a, b, in[7] + 0x676f02d9, 14);
    MD5STEP(F2, b, c, d, a, in[12] + 0x8d2a4c8a, 20);
    MD5STEP(F3, a, b, c, d, in[5] + 0xfffa3942, 4);
    MD5STEP(F3, d, a, b, c, in[8] + 0x8771f681, 11);
    MD5STEP(F3, c, d, a, b, in[11] + 0x6d9d6122, 16);
    MD5STEP(F3, b, c, d, a, in[14] + 0xfde5380c, 23);
    MD5STEP(F3, a, b, c, d, in[1] + 0xa4beea44, 4);
    MD5STEP(F3, d, a, b, c, in[4] + 0x4bdecfa9, 11);
    MD5STEP(F3, c, d, a, b, in[7] + 0xf6bb4b60, 16);
    MD5STEP(F3, b, c, d, a, in[10] + 0xbebfbc70, 23);
    MD5STEP(F3, a, b, c, d, in[13] + 0x289b7ec6, 4);
    MD5STEP(F3, d, a, b, c, in[0] + 0xeaa127fa, 11);
    MD5STEP(F3, c, d, a, b, in[3] + 0xd4ef3085, 16);
    MD5STEP(F3, b, c, d, a, in[6] + 0x04881d05, 23);
    MD5STEP(F3, a, b, c, d, in[9] + 0xd9d4d039, 4);
    MD5STEP(F3, d, a, b, c, in[12] + 0xe6db99e5, 11);
    MD5STEP(F3, c, d, a, b, in[15] + 0x1fa27cf8, 16);
    MD5STEP(F3, b, c, d, a, in[2] + 0xc4ac5665, 23);
    MD5STEP(F4, a, b, c, d, in[0] + 0xf4292244, 6);
    MD5STEP(F4, d, a, b, c, in[7] + 0x432aff97, 10);
    MD5STEP(F4, c, d, a, b, in[14] + 0xab9423a7, 15);
    MD5STEP(F4, b, c, d, a, in[5] + 0xfc93a039, 21);
    MD5STEP(F4, a, b, c, d, in[12] + 0x655b59c3, 6);
    MD5STEP(F4, d, a, b, c, in[3] + 0x8f0ccc92, 10);
    MD5STEP(F4, c, d, a, b, in[10] + 0xffeff47d, 15);
    MD5STEP(F4, b, c, d, a, in[1] + 0x85845dd1, 21);
    MD5STEP(F4, a, b, c, d, in[8] + 0x6fa87e4f, 6);
    MD5STEP(F4, d, a, b, c, in[15] + 0xfe2ce6e0, 10);
    MD5STEP(F4, c, d, a, b, in[6] + 0xa3014314, 15);
    MD5STEP(F4, b, c, d, a, in[13] + 0x4e0811a1, 21);
    MD5STEP(F4, a, b, c, d, in[4] + 0xf7537e82, 6);
    MD5STEP(F4, d, a, b, c, in[11] + 0xbd3af235, 10);
    MD5STEP(F4, c, d, a, b, in[2] + 0x2ad7d2bb, 15);
    MD5STEP(F4, b, c, d, a, in[9] + 0xeb86d391, 21);
    buf[0] += a;
    buf[1] += b;
    buf[2] += c;
    buf[3] += d;
}
char* CMd5(const char* s)
{
     struct MD5Context md5c;
     unsigned char ss[16];
     char subStr[3],resStr[33];
     int i;
     MD5Init( &md5c );
     MD5Update( &md5c, s, strlen(s) );
     MD5Final( ss, &md5c );
     strcpy(resStr,"");
     for( i=0; i<16; i++ )
     {
         sprintf(subStr, "%02x", ss[i] );
         itoa(ss[i],subStr,16);
         if (strlen(subStr)==1) {
             strcat(resStr,"0");
         }
         strcat(resStr,subStr);
     }
     strcat(resStr,"\0");
     return resStr;
}

4. 如果一个action中有两个请求，那么压测是看到的响应时间曲线是两个请求综合的响应时间，如果要区分每个请求的响应时间，可加入请求开始/结束标记
lr_start_transaction(“create”);//插入结束标记，从此结束计时
lr_end_transaction(“create”, LR_AUTO);//插入结束标记，从此结束计时



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