关联函数是一个查找函数，即是从HTML文件内容中查找需要的值，并将其保存在一个变量或数组中。换一个角度看，关联函数不单单可以匹配一些变化的值，同样可以匹配一些固定的内容，并将其保存到一个数据组，供后续业务使用，也即对关联函数进行扩展使用，在处理事务中这种方式经常用到。
实例：以订票为例，假设要实现这样的事务，选择好出发城市和到达城市后，在选择航班时，需要选择票价最便宜的航班
实现思路：首先使用关联函数读取HTML代码中票价和航班号，分别将两部分的数据保存在不同的数组中；接着比较票价，选择找到票价最低的是数组中的第几个元素，即最便宜机票所在数据的下标；最后将该下标的值对应地读出航班号，就是最便宜的航班。
完整代码如下：
【注：还没运行成功，主要是不懂代码函数的运用】
Action() { //录制订票脚本，为了练习关联技术的经典使用 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=t4.inf", "Mode=HTTP", LAST); web_concurrent_start(NULL); 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("webtours.png", "URL=http://127.0.0.1:1080/WebTours/images/webtours.png", "Resource=0", "RecContentType=text/html", "Referer=http://127.0.0.1:1080/WebTours/header.html", "Mode=HTTP", LAST); web_concurrent_end(NULL); 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("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=t7.inf", "Mode=HTTP", 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=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=t10.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=t11.inf", LAST); web_concurrent_end(NULL); lr_start_transaction("登录"); lr_think_time(31); 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=t12.inf", "Mode=HTTP", ITEMDATA, "Name=userSession", "Value=120844.899311462zcVfQfQpfAiDDDDDDHcQfpHfHAf", ENDITEM, "Name=username", "Value=test1", ENDITEM, "Name=password", "Value=test1", ENDITEM, "Name=JSFormSubmit", "Value=off", ENDITEM, "Name=login.x", "Value=36", ENDITEM, "Name=login.y", "Value=15", 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=t13.inf", "Mode=HTTP", 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=t18.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=t14.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=t15.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=t16.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=t17.inf", LAST); web_concurrent_end(NULL); lr_end_transaction("登录", LR_AUTO); lr_start_transaction("订票"); lr_think_time(11); web_url("Search Flights Button", "URL=http://127.0.0.1:1080/WebTours/welcome.pl?page=search", "Resource=0", "RecContentType=text/html", "Referer=http://127.0.0.1:1080/WebTours/nav.pl?page=menu&in=home", "Snapshot=t19.inf", "Mode=HTTP", LAST); web_concurrent_start(NULL); web_url("reservations.pl", "URL=http://127.0.0.1:1080/WebTours/reservations.pl?page=welcome", "Resource=0", "RecContentType=text/html", "Referer=http://127.0.0.1:1080/WebTours/welcome.pl?page=search", "Snapshot=t20.inf", "Mode=HTTP", LAST); web_url("nav.pl_3", "URL=http://127.0.0.1:1080/WebTours/nav.pl?page=menu&in=flights", "Resource=0", "RecContentType=text/html", "Referer=http://127.0.0.1:1080/WebTours/welcome.pl?page=search", "Snapshot=t21.inf", "Mode=HTTP", LAST); web_concurrent_end(NULL); web_url("button_next.gif", "URL=http://127.0.0.1:1080/WebTours/images/button_next.gif", "Resource=1", "RecContentType=image/gif", "Referer=http://127.0.0.1:1080/WebTours/reservations.pl?page=welcome", "Snapshot=t22.inf", LAST); web_concurrent_start(NULL); web_url("in_flights.gif", "URL=http://127.0.0.1:1080/WebTours/images/in_flights.gif", "Resource=1", "RecContentType=image/gif", "Referer=http://127.0.0.1:1080/WebTours/nav.pl?page=menu&in=flights", "Snapshot=t23.inf", LAST); web_url("home.gif", "URL=http://127.0.0.1:1080/WebTours/images/home.gif", "Resource=1", "RecContentType=image/gif", "Referer=http://127.0.0.1:1080/WebTours/nav.pl?page=menu&in=flights", "Snapshot=t24.inf", LAST); web_concurrent_end(NULL); lr_think_time(5); /*分析票价和航班号的左右边界值后（可通过航班信息的HTML源代码分析），在这里插入关联函数，进行关联时Ordinal的属性必须设置为all，这样才可以将所有的值匹配到，并将其保存在一个数组中。*/ //这是航班的关联函数 web_reg_save_param_ex( "ParamName=fligthno", "LB=outboundFlight value=", "RB=;", "Ordinal=all", SEARCH_FILTERS, LAST); //这是票价的关联函数 web_reg_save_param_ex( "ParamName=fligthcost", "LB=center>$", "RB=</TD>", "Ordinal=all", SEARCH_FILTERS, LAST); /*设置一个标记flag来保存票价*/ //初始化最贵机票，将第一个航班的机票设置为初始化的最贵的机票 max = atoi(lr_eval_string ("{wcsparam_text1_1}")); //初始化标识位，默认设置为1 flagno=1; //for循环所有机票 for (i=2;i<=atoi(lr_eval_string ("{wcsparam_text1_count}"));i++) { sprintf(cost,"{wcsparam_text1_%d}",i); //比较最前航班的机票是否大于max的值，如果大于max的值，即重新对max赋值 if(atoi(lr_eval_string (cost))>max){ max=atoi(lr_eval_string (cost)); flagno=i; } } /*找到最便宜的机票后，可以得到该数组的下标，那这个数组的下标所对应的航班就是票价最便宜的航班，获取航班号的代码如下：*/ //通过标识位来确定航班 sprintf(flightelem, "{wcsparam_text2_%d}", flagno); lr_save_string (lr_eval_string (flightelem), "fligthno"); web_submit_data("reservations.pl_2", "Action=http://127.0.0.1:1080/WebTours/reservations.pl", "Method=POST", "RecContentType=text/html", "Referer=http://127.0.0.1:1080/WebTours/reservations.pl?page=welcome", "Snapshot=t25.inf", "Mode=HTTP", ITEMDATA, "Name=advanceDiscount", "Value=0", ENDITEM, "Name=depart", "Value=Denver", ENDITEM, "Name=departDate", "Value=04/11/2017", ENDITEM, "Name=arrive", "Value=London", ENDITEM, "Name=returnDate", "Value=04/12/2017", ENDITEM, "Name=numPassengers", "Value=1", ENDITEM, "Name=seatPref", "Value=Window", ENDITEM, "Name=seatType", "Value=First", ENDITEM, "Name=.cgifields", "Value=roundtrip", ENDITEM, "Name=.cgifields", "Value=seatType", ENDITEM, "Name=.cgifields", "Value=seatPref", ENDITEM, "Name=findFlights.x", "Value=48", ENDITEM, "Name=findFlights.y", "Value=10", ENDITEM, LAST); lr_think_time(4); /*获得最便宜的票价和航班后，即将这两部分的信息放入到提交的信息中，作为客户端的请求进行提交即可，具体代码如下*/ web_submit_data("reservations.pl_3", "Action=http://127.0.0.1:1080/WebTours/reservations.pl", "Method=POST", "RecContentType=text/html", "Referer=http://127.0.0.1:1080/WebTours/reservations.pl", "Snapshot=t26.inf", "Mode=HTTP", ITEMDATA, //"Name=outboundFlight", "Value=023;519;04/11/2017", ENDITEM, "Name=outboundFlight", "Value={flightno};{flightnocost};04/11/2017", ENDITEM, "Name=numPassengers", "Value=1", ENDITEM, "Name=advanceDiscount", "Value=0", ENDITEM, "Name=seatType", "Value=First", ENDITEM, "Name=seatPref", "Value=Window", ENDITEM, "Name=reserveFlights.x", "Value=43", ENDITEM, "Name=reserveFlights.y", "Value=6", ENDITEM, LAST); web_submit_data("reservations.pl_4", "Action=http://127.0.0.1:1080/WebTours/reservations.pl", "Method=POST", "RecContentType=text/html", "Referer=http://127.0.0.1:1080/WebTours/reservations.pl", "Snapshot=t27.inf", "Mode=HTTP", ITEMDATA, "Name=firstName", "Value=test1", ENDITEM, "Name=lastName", "Value=test1", ENDITEM, "Name=address1", "Value=", ENDITEM, "Name=address2", "Value=", ENDITEM, "Name=pass1", "Value=test1 test1", ENDITEM, "Name=creditCard", "Value=", ENDITEM, "Name=expDate", "Value=", ENDITEM, "Name=oldCCOption", "Value=", ENDITEM, "Name=numPassengers", "Value=1", ENDITEM, "Name=seatType", "Value=First", ENDITEM, "Name=seatPref", "Value=Window", ENDITEM, //"Name=outboundFlight", "Value=023;519;04/11/2017", ENDITEM, "Name=outboundFlight", "Value={flightno};{flightnocost};04/11/2017", ENDITEM, "Name=advanceDiscount", "Value=0", ENDITEM, "Name=returnFlight", "Value=", ENDITEM, "Name=JSFormSubmit", "Value=off", ENDITEM, "Name=.cgifields", "Value=saveCC", ENDITEM, "Name=buyFlights.x", "Value=48", ENDITEM, "Name=buyFlights.y", "Value=6", ENDITEM, LAST); web_url("bookanother.gif", "URL=http://127.0.0.1:1080/WebTours/images/bookanother.gif", "Resource=1", "RecContentType=image/gif", "Referer=http://127.0.0.1:1080/WebTours/reservations.pl", "Snapshot=t28.inf", LAST); lr_end_transaction("订票", LR_AUTO); return 0; }
附上航班信息源码：
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml" lang="en-US" xml:lang="en-US"> <head> <title>Flight Selections</title> <meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1" /> </head> <body bgcolor="#E0E7F1"> <style>blockquote {font-family: tahoma; font-size : 10pt}H1 {font-family: tahoma; font-size : 22pt; color: #993333}small {font-family: tahoma; font-size : 8pt}H3 {font-family: tahoma; font-size : 10pt; color: black}TD {font-family: tahoma; font-size : 10pt; color: black}</style><BR><BR><h1><font color=#003366> <b>Find Flight</font></b></h1><blockquote> <form method="post" action="reservations.pl" enctype="application/x-www-form-urlencoded"> <center> <!-- From Denver (0) To London (2) --> <table cellspacing=2 border=0 width=50%> <blockquote>Flight departing from <B>Denver</B> to <B>London</B> on <B>04/11/2017</B><BR><BR><tr bgcolor=#5E7884><td align=center><font color=white><B>Flight</B></font> <td align=center><font color=white><B>Departure time</B> <td align=center><font color=white><B>Cost</B> //从下面可以看出航班（020、021...）的 左边界是 outboundFlight value= 右边界是 ; // 票价（$ 635、$ 565...）的 左边界是 center>$ 右边界是 </TD> <tr bgcolor=#EFF2F7> <td align=center><input type = radio name=outboundFlight value=020;635;04/11/2017 checked >Blue Sky Air 020<td align=center>8am<td align=center>$ 635</TD> </TR> <tr bgcolor=#EFF2F7> <td align=center><input type = radio name=outboundFlight value=021;565;04/11/2017>Blue Sky Air 021<td align=center>1pm<td align=center>$ 565</TD> </TR> <tr bgcolor=#EFF2F7> <td align=center><input type = radio name=outboundFlight value=022;600;04/11/2017>Blue Sky Air 022<td align=center>5pm<td align=center>$ 600</TD> </TR> <tr bgcolor=#EFF2F7> <td align=center><input type = radio name=outboundFlight value=023;519;04/11/2017>Blue Sky Air 023<td align=center>11pm<td align=center>$ 519</TD> </TR> </table> <input type="hidden" name="numPassengers" value="1" /><input type="hidden" name="advanceDiscount" value="0" /><input type="hidden" name="seatType" value="First" /><input type="hidden" name="seatPref" value="Window" /> <P><center><table width=80% cellspacing=1><tr><td align=center> <input type="image" name="reserveFlights" src="/WebTours/images/button_next.gif" border="0" /> <td> <td align=center></table></center></form></center> </blockquote> </body> </html>