2、录制后关联
当录制前内建关联规则和新建规则都不能满足需要时，或者不知道哪个地方需要关联时，只能采取录制后进行关联。录制后关联与内建关联是有区别的，录制后关联是在执行脚本后才会建立，也就是说，当录制完脚本后，脚本至少要执行一次，录制后关联才会产生效果。录制后会尝试找到录制与执行时服务器响应的差异部分，找到需要关联的数据，并建立关联。
脚本执行后，vuser->scan script for correlations，扫描后，选择需要关联的数据，单击correlate，这时被关联的数据前面会多出一个绿色的勾，即表示关联创建完成了，如图7所示：
图7（关联结果）
关联完成后也是会自动生成web_reg_param关联函数，完整代码示例如下（期间遇到报错error-35061，在代码中有说明解决方法）：
Action() { web_url("WebTours", "URL=http://127.0.0.1:1080/WebTours", "Resource=0", "RecContentType=text/html", "Referer=", "Snapshot=t1.inf", "Mode=HTTP", LAST); web_url("header.html", "URL=http://127.0.0.1:1080/WebTours/header.html", "Resource=0", "RecContentType=text/html", "Referer=http://127.0.0.1:1080/WebTours/", "Snapshot=t2.inf", "Mode=HTTP", LAST); web_url("webtours.png", "URL=http://127.0.0.1:1080/WebTours/images/webtours.png", "Resource=1", "RecContentType=image/png", "Referer=http://127.0.0.1:1080/WebTours/header.html", "Snapshot=t4.inf", LAST); web_url("hp_logo.png", "URL=http://127.0.0.1:1080/WebTours/images/hp_logo.png", "Resource=1", "RecContentType=image/png", "Referer=http://127.0.0.1:1080/WebTours/header.html", "Snapshot=t5.inf", LAST); web_url("welcome.pl", "URL=http://127.0.0.1:1080/WebTours/welcome.pl?signOff=true", "Resource=0", "RecContentType=text/html", "Referer=http://127.0.0.1:1080/WebTours/", "Snapshot=t6.inf", "Mode=HTTP", LAST); web_concurrent_start(NULL); web_url("home.html", "URL=http://127.0.0.1:1080/WebTours/home.html", "Resource=0", "RecContentType=text/html", "Referer=http://127.0.0.1:1080/WebTours/welcome.pl?signOff=true", "Snapshot=t7.inf", "Mode=HTTP", LAST); //下面的一行注释和web_reg_save_param_ex关联函数是录制后关联所自动创建的 //Correlation comment - Do not change!Original value='120705.370676387zcAiHicpfAtVzzzHDHcfcpzQfAcf' Name ='CorrelationParameter_1' web_reg_save_param_ex(//这个关联函数与web_reg_save_param函数实质差别不大 "ParamName=CorrelationParameter_1",//变量名称，表示将缓存区中查找到的内容保存到这个变量中 "LB=userSession value=",//左边界值 "RB=>\n<table border",//右边界值 SEARCH_FILTERS,//指定缓冲区中需要查找的字符串 "Scope=Body", //"RequestUrl=*/nav.pl*", /*因为报错error-35061，所以要注释掉自动生成的关联函数中的这一行*/ LAST);//结束参数标志 web_url("nav.pl", "URL=http://127.0.0.1:1080/WebTours/nav.pl?in=home", "Resource=0", "RecContentType=text/html", "Referer=http://127.0.0.1:1080/WebTours/welcome.pl?signOff=true", "Snapshot=t8.inf", "Mode=HTTP", LAST); web_concurrent_end(NULL); web_url("mer_login.gif", "URL=http://127.0.0.1:1080/WebTours/images/mer_login.gif", "Resource=1", "RecContentType=image/gif", "Referer=http://127.0.0.1:1080/WebTours/nav.pl?in=home", "Snapshot=t9.inf", LAST); web_concurrent_start(NULL); web_url("8afc2fe48db9060fe1bdda2089e1d950.png", "URL=http://act.cmcmcdn.com/upload/201507/8afc2fe48db9060fe1bdda2089e1d950.png", "Resource=1", "RecContentType=image/png", "Referer=http://127.0.0.1:1080/WebTours/", "Snapshot=t11.inf", LAST); web_url("3b491068507d8f85ea7b35d756da7215.png", "URL=http://act.cmcmcdn.com/upload/201507/3b491068507d8f85ea7b35d756da7215.png", "Resource=1", "RecContentType=image/png", "Referer=http://127.0.0.1:1080/WebTours/", "Snapshot=t12.inf", LAST); web_concurrent_end(NULL); lr_start_transaction("登录"); lr_think_time(6); web_submit_data("login.pl", "Action=http://127.0.0.1:1080/WebTours/login.pl", "Method=POST", "RecContentType=text/html", "Referer=http://127.0.0.1:1080/WebTours/nav.pl?in=home", "Snapshot=t15.inf", "Mode=HTTP", ITEMDATA, //用CorrelationParameter_1变量代替常量，即value的值要改为变量值 "Name=userSession", "Value={CorrelationParameter_1}", ENDITEM, "Name=username", "Value=test1", ENDITEM, "Name=password", "Value=test1", ENDITEM,//password的值如果是正确的,返回 "PASS";如果是错误的,则返回"FAIL" "Name=JSFormSubmit", "Value=off", ENDITEM, "Name=login.x", "Value=0", ENDITEM, "Name=login.y", "Value=0", ENDITEM, LAST); web_concurrent_start(NULL); //在该位置插入检查点 web_reg_find("Text=test1", "SaveCount=num",//用变量num统计查找内容test1 "Search=Body", LAST); web_url("login.pl_2", "URL=http://127.0.0.1:1080/WebTours/login.pl?intro=true", "Resource=0", "RecContentType=text/html", "Referer=http://127.0.0.1:1080/WebTours/login.pl", "Snapshot=t16.inf", "Mode=HTTP", LAST); web_url("nav.pl_2", "URL=http://127.0.0.1:1080/WebTours/nav.pl?page=menu&in=home", "Resource=0", "RecContentType=text/html", "Referer=http://127.0.0.1:1080/WebTours/login.pl", "Snapshot=t17.inf", "Mode=HTTP", LAST); web_concurrent_end(NULL); web_concurrent_start(NULL); web_url("flights.gif", "URL=http://127.0.0.1:1080/WebTours/images/flights.gif", "Resource=1", "RecContentType=image/gif", "Referer=http://127.0.0.1:1080/WebTours/nav.pl?page=menu&in=home", "Snapshot=t18.inf", LAST); web_url("itinerary.gif", "URL=http://127.0.0.1:1080/WebTours/images/itinerary.gif", "Resource=1", "RecContentType=image/gif", "Referer=http://127.0.0.1:1080/WebTours/nav.pl?page=menu&in=home", "Snapshot=t19.inf", LAST); web_url("signoff.gif", "URL=http://127.0.0.1:1080/WebTours/images/signoff.gif", "Resource=1", "RecContentType=image/gif", "Referer=http://127.0.0.1:1080/WebTours/nav.pl?page=menu&in=home", "Snapshot=t20.inf", LAST); web_url("in_home.gif", "URL=http://127.0.0.1:1080/WebTours/images/in_home.gif", "Resource=1", "RecContentType=image/gif", "Referer=http://127.0.0.1:1080/WebTours/nav.pl?page=menu&in=home", "Snapshot=t21.inf", LAST); web_concurrent_end(NULL); //判断事务结束状态 if(atoi(lr_eval_string("{num}"))>=1){//判断变量num（即查找内容的次数）是否大于或等于1 lr_end_transaction("登录", LR_PASS);//如果是，则说明找到了，即登录成功，返回LR_PASS } else{ lr_end_transaction("登录", LR_FAIL);//否则，返回LR_FAIL } return 0; } |
3、手动关联
手动关联与前面所提到的两种自动关联不同，但原理是一样的，需要先找到需要关联的量，然后使用LR提供的关联函数进行关联。这方法是用于上面两种方法都不能解决的情况，步骤如下：
1）录制两份脚本，保证事务流程和使用的数据相同；
2）使用WinDiff工具比较两份脚本，找到需要关联的数据。（WinDiff是LR自带的文件比较工具）tools->compare with vuser，弹出的对话框中选择要和当前脚本进行比较的脚本，WinDiff会显示有差异的地方，每个差异的地方都可能是需要关联的地方，但是lr_think_time的差异部分是不需要关联的；
3）找到左边界和右边界字符串；
4）使用web_reg_save_param函数手动建立关联。首先找到关联函数插入的位置，选择vuser->run-time settings->general->log->extended log，将下面所有选项都选中。在replay log中找到windiff中比较不同的字符串，双击后，那行代码前面就是为要插入关联函数的位置，如图8所示：
图8（关联函数插入位置）
5）将脚本中的该关联数据以参数取代。当使用web_reg_save_param建立参数后，接下来就是用参数去取代脚本中的常量，如图9所示：
完整代码示例如下（期间遇到报错error-27216及执行失败，代码中有说明解决方法）：
Action() { web_url("WebTours", "URL=http://127.0.0.1:1080/WebTours", "Resource=0", "RecContentType=text/html", "Referer=", "Snapshot=t2.inf", "Mode=HTTP", LAST); web_url("header.html", "URL=http://127.0.0.1:1080/WebTours/header.html", "Resource=0", "RecContentType=text/html", "Referer=http://127.0.0.1:1080/WebTours/", "Snapshot=t3.inf", "Mode=HTTP", LAST); web_url("hp_logo.png", "URL=http://127.0.0.1:1080/WebTours/images/hp_logo.png", "Resource=1", "RecContentType=image/png", "Referer=http://127.0.0.1:1080/WebTours/header.html", "Snapshot=t5.inf", LAST); web_url("welcome.pl", "URL=http://127.0.0.1:1080/WebTours/welcome.pl?signOff=true", "Resource=0", "RecContentType=text/html", "Referer=http://127.0.0.1:1080/WebTours/", "Snapshot=t6.inf", "Mode=HTTP", LAST); web_url("webtours.png", "URL=http://127.0.0.1:1080/WebTours/images/webtours.png", "Resource=1", "RecContentType=image/png", "Referer=http://127.0.0.1:1080/WebTours/header.html", "Snapshot=t7.inf", LAST); web_url("home.html", "URL=http://127.0.0.1:1080/WebTours/home.html", "Resource=0", "RecContentType=text/html", "Referer=http://127.0.0.1:1080/WebTours/welcome.pl?signOff=true", "Snapshot=t11.inf", "Mode=HTTP", LAST); //下面是手动写的关联函数，但是运行报错(error-27216) //web_reg_save_param("BL", // "LB=userSession value=", // "RB=>", // "Search=Body", // LAST); //所以尝试在树模型下插入关联函数，结果运行成功了,下面是用插入方式插入的关联函数 web_reg_save_param("BL",//创建变量BL "LB=userSession value=", "RB=>", "Search=Body", LAST); web_url("nav.pl", "URL=http://127.0.0.1:1080/WebTours/nav.pl?in=home", "Resource=0", "RecContentType=text/html", "Referer=http://127.0.0.1:1080/WebTours/welcome.pl?signOff=true", "Snapshot=t12.inf", "Mode=HTTP", LAST); web_url("mer_login.gif", "URL=http://127.0.0.1:1080/WebTours/images/mer_login.gif", "Resource=1", "RecContentType=image/gif", "Referer=http://127.0.0.1:1080/WebTours/nav.pl?in=home", "Snapshot=t13.inf", LAST); web_concurrent_start(NULL); web_url("8afc2fe48db9060fe1bdda2089e1d950.png", "URL=http://act.cmcmcdn.com/upload/201507/8afc2fe48db9060fe1bdda2089e1d950.png", "Resource=1", "RecContentType=image/png", "Referer=http://127.0.0.1:1080/WebTours/", "Snapshot=t18.inf", LAST); web_url("3b491068507d8f85ea7b35d756da7215.png", "URL=http://act.cmcmcdn.com/upload/201507/3b491068507d8f85ea7b35d756da7215.png", "Resource=1", "RecContentType=image/png", "Referer=http://127.0.0.1:1080/WebTours/", "Snapshot=t19.inf", LAST); web_concurrent_end(NULL); lr_start_transaction("登录"); lr_think_time(15); web_submit_data("login.pl", "Action=http://127.0.0.1:1080/WebTours/login.pl", "Method=POST", "RecContentType=text/html", "Referer=http://127.0.0.1:1080/WebTours/nav.pl?in=home", "Snapshot=t20.inf", "Mode=HTTP", ITEMDATA, //用BL变量代替常量，即value的值要改为变量值 //如果直接输入session的参数变量值时执行失败的话，可以尝试右键replace with a parameter（我就有遇到这个情况） "Name=userSession", "Value={BL}", ENDITEM, "Name=username", "Value=test1", ENDITEM, "Name=password", "Value=test1", ENDITEM,//password的值如果是正确的,返回 "PASS";如果是错误的,则返回"FAIL" "Name=JSFormSubmit", "Value=off", ENDITEM, "Name=login.x", "Value=48", ENDITEM, "Name=login.y", "Value=13", ENDITEM, LAST); web_concurrent_start(NULL); web_url("nav.pl_2", "URL=http://127.0.0.1:1080/WebTours/nav.pl?page=menu&in=home", "Resource=0", "RecContentType=text/html", "Referer=http://127.0.0.1:1080/WebTours/login.pl", "Snapshot=t21.inf", "Mode=HTTP", LAST); //在树模型下插入的检查点 web_reg_find("Text=test1", "SaveCount=num",//用变量num统计查找内容test1 "Search=Body", LAST); web_url("login.pl_2", "URL=http://127.0.0.1:1080/WebTours/login.pl?intro=true", "Resource=0", "RecContentType=text/html", "Referer=http://127.0.0.1:1080/WebTours/login.pl", "Snapshot=t22.inf", "Mode=HTTP", LAST); web_concurrent_end(NULL); web_concurrent_start(NULL); web_url("flights.gif", "URL=http://127.0.0.1:1080/WebTours/images/flights.gif", "Resource=1", "RecContentType=image/gif", "Referer=http://127.0.0.1:1080/WebTours/nav.pl?page=menu&in=home", "Snapshot=t23.inf", LAST); web_url("itinerary.gif", "URL=http://127.0.0.1:1080/WebTours/images/itinerary.gif", "Resource=1", "RecContentType=image/gif", "Referer=http://127.0.0.1:1080/WebTours/nav.pl?page=menu&in=home", "Snapshot=t24.inf", LAST); web_url("signoff.gif", "URL=http://127.0.0.1:1080/WebTours/images/signoff.gif", "Resource=1", "RecContentType=image/gif", "Referer=http://127.0.0.1:1080/WebTours/nav.pl?page=menu&in=home", "Snapshot=t25.inf", LAST); web_url("in_home.gif", "URL=http://127.0.0.1:1080/WebTours/images/in_home.gif", "Resource=1", "RecContentType=image/gif", "Referer=http://127.0.0.1:1080/WebTours/nav.pl?page=menu&in=home", "Snapshot=t26.inf", LAST); web_concurrent_end(NULL); //判断事务结束状态 if(atoi(lr_eval_string("{num}"))>=1){//判断变量Num（即查找内容的次数）是否大于或等于1 lr_end_transaction("登录", LR_PASS);//如果是，则返回LR_PASS } else{ lr_end_transaction("登录", LR_FAIL);//否则，返回LR_FAIL } return 0; } |
