使用loadrunner进行压力测试之----post请求

1. 发送post请求时使用web_submit_data 

如：

 1 web_submit_data("create",//事务名 
 2           "Action=http://bizhi.sogou.com/diy/", //请求域名
 3           "Method=POST", //请求类型为post
 4           "RecContentType=application/json", //返回格式为json
 5           "Referer=http://bizhi.sogou.com/diy?wp_id=8743",
 6           "Snapshot=t4.inf",
 7           "Mode=HTML",
 8           ITEMDATA, //下面编辑post请求的数据
 9           "Name=img", "Value=http://dl.bizhi.sogou.com/images/2012/05/3/8743.jpg", ENDITEM, //数据的name、value及结束符
10           "Name=left", "Value=60", ENDITEM, //第二条数据的name、value及结束符
11           "Name=top", "Value=30", ENDITEM,
12           "Name=width", "Value=720", ENDITEM,
13           "Name=height", "Value=450", ENDITEM,
14           "Name=model", "Value=5/5s", ENDITEM,
15           "Name=x", "Value=1", ENDITEM,
16           "Name=y", "Value=1", ENDITEM,
17           "Name=ofc", "Value=1", ENDITEM,
18           "Name=wp_id", "Value=8743", ENDITEM,
19           "Name=mat", "Value=ms", ENDITEM,
20           "Name=curMode", "Value=normal", ENDITEM,
21           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：

 1 web_submit_data("create",
 2           "Action=http://bizhi.sogou.com/diy/",
 3           "Method=POST",
 4           "RecContentType=application/json",
 5           "Referer=http://bizhi.sogou.com/diy?wp_id=8743",
 6           "Snapshot=t4.inf",
 7           "Mode=HTML",
 8           ITEMDATA,
 9           "Name=img", "Value=http://dl.bizhi.sogou.com/images/2012/05/3/8743.jpg", ENDITEM,
10           "Name=left", "Value=60", ENDITEM,
11           "Name=top", "Value=30", ENDITEM,
12           "Name=width", "Value=720", ENDITEM,
13           "Name=height", "Value=450", ENDITEM,
14           "Name=model", "Value=5/5s", ENDITEM,
15           "Name=x", "Value=1", ENDITEM,
16           "Name=y", "Value=1", ENDITEM,
17           "Name=ofc", "Value=1", ENDITEM,
18           "Name=wp_id", "Value=8743", ENDITEM,
19           "Name=mat", "Value=ms", ENDITEM,
20           "Name=curMode", "Value=normal", ENDITEM,
21           LAST);//请求1
22 
23      lr_set_debug_message( 16 | 2,0 );
24      lr_save_string((char*)strtok(lr_eval_string("{Output}"),","),"temp");//获得请求1的返回数据
25      //lr_output_message("bian:%s",lr_eval_string("{temp}"));
26      lr_save_string((char*)strtok(NULL,","),"diyid_temp");//解析返回数据
27      //lr_output_message("bian2:%s",lr_eval_string("{diyid_temp}"));
28      lr_save_string((char*)strtok(lr_eval_string("{diyid_temp}"),":"),"temp");//解析返回数据
29      //lr_output_message("bian:%s",lr_eval_string("{temp}"));
30      lr_save_string((char*)strtok(NULL,":"),"diyid_temp");//解析返回数据
31      //lr_output_message("bian2:%s",lr_eval_string("{diyid_temp}"));
32      diyid_str=(char*)strtok(lr_eval_string("{diyid_temp}"),"}");
33      lr_save_string((char*)strtok(lr_eval_string("{diyid_temp}"),"}"),"diyid");//解析返回数据
34      //lr_output_message("bian:%s",lr_eval_string("{diyid}"));
35 
36      strcat(test, diyid_str);
37      //lr_output_message("%s",test);
38      lr_save_string(CMd5(test),"md5");//计算md5
39      //lr_output_message("bianmd5:%s",lr_eval_string("{md5}"));
40 
41 
42      web_submit_data("postname",
43                 "Action=http://bizhi.sogou.com/orderpay/",
44                 "Method=POST",
45                 "RecContentType=textml",
46                 "Mode=HTML",
47                 ITEMDATA,
48                 "Name=goods_action","Value=goods_detail",ENDITEM,
49                     "Name=goods_addr","Value=656",ENDITEM,
50                     "Name=md5str","Value={md5}",ENDITEM,//根据参数构造请求
51                     "Name=diy_id","Value={diyid}",ENDITEM,//根据参数构造请求
52                     "Name=goods_info","Value=448_1",ENDITEM,
53                     "Name=from","Value=diy",ENDITEM,
54                     "Name=Accept","Value=text/plain",ENDITEM,
55                 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

  1 #ifndef MD5_H
  2 #define MD5_H
  3 #ifdef __alpha
  4 typedef unsigned int uint32;
  5 #else
  6 typedef unsigned long uint32;
  7 #endif
  8 struct MD5Context {
  9         uint32 buf[4];
 10         uint32 bits[2];
 11         unsigned char in[64];
 12 };
 13 extern void MD5Init();
 14 extern void MD5Update();
 15 extern void MD5Final();
 16 extern void MD5Transform();
 17 typedef struct MD5Context MD5_CTX;
 18 #endif
 19 #ifdef sgi
 20 #define HIGHFIRST
 21 #endif
 22 #ifdef sun
 23 #define HIGHFIRST
 24 #endif
 25 #ifndef HIGHFIRST
 26 #define byteReverse(buf, len)    /* Nothing */
 27 #else
 28 void byteReverse(buf, longs)unsigned char *buf; unsigned longs;
 29 {
 30     uint32 t;
 31     do {
 32     t = (uint32) ((unsigned) buf[3] << 8 | buf[2]) << 16 |((unsigned) buf[1] << 8 | buf[0]);
 33     *(uint32 *) buf = t;
 34     buf += 4;
 35     } while (--longs);
 36 }
 37 #endif
 38 void MD5Init(ctx)struct MD5Context *ctx;
 39 {
 40     ctx->buf[0] = 0x67452301;
 41     ctx->buf[1] = 0xefcdab89;
 42     ctx->buf[2] = 0x98badcfe;
 43     ctx->buf[3] = 0x10325476;
 44     ctx->bits[0] = 0;
 45     ctx->bits[1] = 0;
 46 }
 47 void MD5Update(ctx, buf, len) struct MD5Context *ctx; unsigned char *buf; unsigned len;
 48 {
 49     uint32 t;
 50     t = ctx->bits[0];
 51     if ((ctx->bits[0] = t + ((uint32) len << 3)) < t)
 52     ctx->bits[1]++;
 53     ctx->bits[1] += len >> 29;
 54     t = (t >> 3) & 0x3f;
 55     if (t) {
 56     unsigned char *p = (unsigned char *) ctx->in + t;
 57     t = 64 - t;
 58     if (len < t) {
 59         memcpy(p, buf, len);
 60         return;
 61     }
 62     memcpy(p, buf, t);
 63     byteReverse(ctx->in, 16);
 64     MD5Transform(ctx->buf, (uint32 *) ctx->in);
 65     buf += t;
 66     len -= t;
 67     }
 68     while (len >= 64) {
 69     memcpy(ctx->in, buf, 64);
 70     byteReverse(ctx->in, 16);
 71     MD5Transform(ctx->buf, (uint32 *) ctx->in);
 72     buf += 64;
 73     len -= 64;
 74     }
 75     memcpy(ctx->in, buf, len);
 76 }
 77 void MD5Final(digest, ctx)
 78     unsigned char digest[16]; struct MD5Context *ctx;
 79 {
 80     unsigned count;
 81     unsigned char *p;
 82     count = (ctx->bits[0] >> 3) & 0x3F;
 83     p = ctx->in + count;
 84     *p++ = 0x80;
 85     count = 64 - 1 - count;
 86     if (count < 8) {
 87     memset(p, 0, count);
 88     byteReverse(ctx->in, 16);
 89     MD5Transform(ctx->buf, (uint32 *) ctx->in);
 90     memset(ctx->in, 0, 56);
 91     } else {
 92     memset(p, 0, count - 8);
 93     }
 94     byteReverse(ctx->in, 14);
 95     ((uint32 *) ctx->in)[14] = ctx->bits[0];
 96     ((uint32 *) ctx->in)[15] = ctx->bits[1];
 97     MD5Transform(ctx->buf, (uint32 *) ctx->in);
 98     byteReverse((unsigned char *) ctx->buf, 4);
 99     memcpy(digest, ctx->buf, 16);
100     memset(ctx, 0, sizeof(ctx));
101 }
102 #define F1(x, y, z) (z ^ (x & (y ^ z)))
103 #define F2(x, y, z) F1(z, x, y)
104 #define F3(x, y, z) (x ^ y ^ z)
105 #define F4(x, y, z) (y ^ (x | ~z))
106 #define MD5STEP(f, w, x, y, z, data, s) ( w += f(x, y, z) + data,  w = w<<s | w>>(32-s),  w += x )
107 void MD5Transform(buf, in)
108     uint32 buf[4]; uint32 in[16];
109 {
110     register uint32 a, b, c, d;
111     a = buf[0];
112     b = buf[1];
113     c = buf[2];
114     d = buf[3];
115     MD5STEP(F1, a, b, c, d, in[0] + 0xd76aa478, 7);
116     MD5STEP(F1, d, a, b, c, in[1] + 0xe8c7b756, 12);
117     MD5STEP(F1, c, d, a, b, in[2] + 0x242070db, 17);
118     MD5STEP(F1, b, c, d, a, in[3] + 0xc1bdceee, 22);
119     MD5STEP(F1, a, b, c, d, in[4] + 0xf57c0faf, 7);
120     MD5STEP(F1, d, a, b, c, in[5] + 0x4787c62a, 12);
121     MD5STEP(F1, c, d, a, b, in[6] + 0xa8304613, 17);
122     MD5STEP(F1, b, c, d, a, in[7] + 0xfd469501, 22);
123     MD5STEP(F1, a, b, c, d, in[8] + 0x698098d8, 7);
124     MD5STEP(F1, d, a, b, c, in[9] + 0x8b44f7af, 12);
125     MD5STEP(F1, c, d, a, b, in[10] + 0xffff5bb1, 17);
126     MD5STEP(F1, b, c, d, a, in[11] + 0x895cd7be, 22);
127     MD5STEP(F1, a, b, c, d, in[12] + 0x6b901122, 7);
128     MD5STEP(F1, d, a, b, c, in[13] + 0xfd987193, 12);
129     MD5STEP(F1, c, d, a, b, in[14] + 0xa679438e, 17);
130     MD5STEP(F1, b, c, d, a, in[15] + 0x49b40821, 22);
131     MD5STEP(F2, a, b, c, d, in[1] + 0xf61e2562, 5);
132     MD5STEP(F2, d, a, b, c, in[6] + 0xc040b340, 9);
133     MD5STEP(F2, c, d, a, b, in[11] + 0x265e5a51, 14);
134     MD5STEP(F2, b, c, d, a, in[0] + 0xe9b6c7aa, 20);
135     MD5STEP(F2, a, b, c, d, in[5] + 0xd62f105d, 5);
136     MD5STEP(F2, d, a, b, c, in[10] + 0x02441453, 9);
137     MD5STEP(F2, c, d, a, b, in[15] + 0xd8a1e681, 14);
138     MD5STEP(F2, b, c, d, a, in[4] + 0xe7d3fbc8, 20);
139     MD5STEP(F2, a, b, c, d, in[9] + 0x21e1cde6, 5);
140     MD5STEP(F2, d, a, b, c, in[14] + 0xc33707d6, 9);
141     MD5STEP(F2, c, d, a, b, in[3] + 0xf4d50d87, 14);
142     MD5STEP(F2, b, c, d, a, in[8] + 0x455a14ed, 20);
143     MD5STEP(F2, a, b, c, d, in[13] + 0xa9e3e905, 5);
144     MD5STEP(F2, d, a, b, c, in[2] + 0xfcefa3f8, 9);
145     MD5STEP(F2, c, d, a, b, in[7] + 0x676f02d9, 14);
146     MD5STEP(F2, b, c, d, a, in[12] + 0x8d2a4c8a, 20);
147     MD5STEP(F3, a, b, c, d, in[5] + 0xfffa3942, 4);
148     MD5STEP(F3, d, a, b, c, in[8] + 0x8771f681, 11);
149     MD5STEP(F3, c, d, a, b, in[11] + 0x6d9d6122, 16);
150     MD5STEP(F3, b, c, d, a, in[14] + 0xfde5380c, 23);
151     MD5STEP(F3, a, b, c, d, in[1] + 0xa4beea44, 4);
152     MD5STEP(F3, d, a, b, c, in[4] + 0x4bdecfa9, 11);
153     MD5STEP(F3, c, d, a, b, in[7] + 0xf6bb4b60, 16);
154     MD5STEP(F3, b, c, d, a, in[10] + 0xbebfbc70, 23);
155     MD5STEP(F3, a, b, c, d, in[13] + 0x289b7ec6, 4);
156     MD5STEP(F3, d, a, b, c, in[0] + 0xeaa127fa, 11);
157     MD5STEP(F3, c, d, a, b, in[3] + 0xd4ef3085, 16);
158     MD5STEP(F3, b, c, d, a, in[6] + 0x04881d05, 23);
159     MD5STEP(F3, a, b, c, d, in[9] + 0xd9d4d039, 4);
160     MD5STEP(F3, d, a, b, c, in[12] + 0xe6db99e5, 11);
161     MD5STEP(F3, c, d, a, b, in[15] + 0x1fa27cf8, 16);
162     MD5STEP(F3, b, c, d, a, in[2] + 0xc4ac5665, 23);
163     MD5STEP(F4, a, b, c, d, in[0] + 0xf4292244, 6);
164     MD5STEP(F4, d, a, b, c, in[7] + 0x432aff97, 10);
165     MD5STEP(F4, c, d, a, b, in[14] + 0xab9423a7, 15);
166     MD5STEP(F4, b, c, d, a, in[5] + 0xfc93a039, 21);
167     MD5STEP(F4, a, b, c, d, in[12] + 0x655b59c3, 6);
168     MD5STEP(F4, d, a, b, c, in[3] + 0x8f0ccc92, 10);
169     MD5STEP(F4, c, d, a, b, in[10] + 0xffeff47d, 15);
170     MD5STEP(F4, b, c, d, a, in[1] + 0x85845dd1, 21);
171     MD5STEP(F4, a, b, c, d, in[8] + 0x6fa87e4f, 6);
172     MD5STEP(F4, d, a, b, c, in[15] + 0xfe2ce6e0, 10);
173     MD5STEP(F4, c, d, a, b, in[6] + 0xa3014314, 15);
174     MD5STEP(F4, b, c, d, a, in[13] + 0x4e0811a1, 21);
175     MD5STEP(F4, a, b, c, d, in[4] + 0xf7537e82, 6);
176     MD5STEP(F4, d, a, b, c, in[11] + 0xbd3af235, 10);
177     MD5STEP(F4, c, d, a, b, in[2] + 0x2ad7d2bb, 15);
178     MD5STEP(F4, b, c, d, a, in[9] + 0xeb86d391, 21);
179     buf[0] += a;
180     buf[1] += b;
181     buf[2] += c;
182     buf[3] += d;
183 }
184 char* CMd5(const char* s)
185 {
186      struct MD5Context md5c;
187      unsigned char ss[16];
188      char subStr[3],resStr[33];
189      int i;
190      MD5Init( &md5c );
191      MD5Update( &md5c, s, strlen(s) );
192      MD5Final( ss, &md5c );
193      strcpy(resStr,"");
194      for( i=0; i<16; i++ )
195      {
196          sprintf(subStr, "%02x", ss[i] );
197          itoa(ss[i],subStr,16);
198          if (strlen(subStr)==1) {
199              strcat(resStr,"0");
200          }
201          strcat(resStr,subStr);
202      }
203      strcat(resStr,"\0");
204      return resStr;
205 }

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

1 lr_start_transaction(“create”);//插入结束标记，从此结束计时
2 lr_end_transaction(“create”, LR_AUTO);//插入结束标记，从此结束计时

转自：51testing论坛