Validation check in web services protocol using lr_XML_get_values()

The function lr_xml_get_values executes queries on the string xml_input. The results of each query are stored in the parameter Result.

#include "as_web.h"

/* The XML Data */
char *xml_input=
"<acme_org>"
     " <accounts_dept>"
          "<employee>"
               " <name>Kevin Sharp</name>"
               "<cubicle>227</cubicle>"
               "<extension>2145</extension>"
          "</employee>"
     "</accounts_dept>"
     "<engineering_dept>"
          "<employee>"
               "<name>John Smith</name>"
               "<cubicle>372</cubicle>"
               "<extension>2970</extension>"
          "</employee>"
          "<employee level=\"manager\">"
               "<name>Sue Jones</name>"
               "<extension>2375</extension>"
          "</employee>"
     "</engineering_dept>"
"</acme_org>";

Action() {

    int query_number = 1;

// Save data as parameter

    lr_save_string(xml_input, "XML_Input_Param");

    /* Query 1: Find the first employee's name

        (To find the names of all employees

        see Multiple Query Matching)    */

    lr_xml_get_values("XML={XML_Input_Param}",

        "ValueParam=Result",

        "Query=/acme_org/*/employee/name",

        LAST );

    /* Query 2: Find the first extension number one

        or more levels deep */

    lr_xml_get_values("XML={XML_Input_Param}",

        "ValueParam=Result",

        "Query=//extension",

        LAST );

    /* Query 3: Find the name of the manager

        of the engineering department. */

    lr_xml_get_values("XML={XML_Input_Param}",

        "ValueParam=Result",

"Query=/acme_org/engineering_dept/employee[@level=\"manager\"]/name",

        LAST );

    /* Query 4: Find the name of an employee

    whose extension number is 2970 */

    lr_xml_get_values("XML={XML_Input_Param}",

        "ValueParam=Result",

        "Query=/acme_org/*/employee[extension=\"2970\"]/name",

        LAST );

    return 0;

}

Output from Execution Log Window:
Action.c(33): Saving Parameter "Result = Kevin Sharp"
Action.c(33): "lr_xml_get_values" was successful, 1 match processed
Action.c(37): Saving Parameter "Result = 2145"
Action.c(37): "lr_xml_get_values" was successful, 1 match processed
Action.c(41): Saving Parameter "Result = Sue Jones"
Action.c(41): "lr_xml_get_values" was successful, 1 match processed
Action.c(46): Saving Parameter "Result = John Smith"
Action.c(46): "lr_xml_get_values" was successful, 1 match processed

IP spoofing in loadrunner vugen and performance center

IP of client machine's is identity used by Servers and Network devices like routers to recognize them and then to cache the information and optimize themselves.
Sometimes we need to use different IPs to emulate the real world scenarios to make servers and devices see as if users are coming from different sources.

But this task is not simple.

Our job here is to fool the devices and it requires three simple steps:

1. Run IP Wizard (Start > Program Files > LoadRunner > Tools > IP Wizard) on LG to add the IPs you want to emulate in scenario.

2. Update the server’s routing table with new IPs, this is done so that servers are able trace back to the client. If client and server are in same network and subnet mask then not need of modification is required.
To update the table edit the batch file in IP wizard summary use route command as below to update:
“route ADD [IPs you want to add] MASK 255.255.255.255 [Your_IP] METRIC1”
“route ADD [IPs you want to add] MASK 255.255.255.255 [Your_IP] METRIC2”
Now run this .bat file on server to update.

3. Enable IP Spoofing ( Scenario > Enable IP Spoofer ) from Controller, before connecting to LG.

Replace function used Vugen scripts

char *strSource;

void Replace( char *strSource, char *strFrom, char *strTo, char *strParam)

{

   char strTemp[1024];

char *s= (char *)strSource;

int i=0;

int iLenFrom = strlen (strFrom);

int iLenTo = strlen(strTo);

while(*s)

{

if(strncmp (s,strFrom, iLenFrom) ==0)

{

strncpy(&(strTemp[i]), strTo, iLenTo);

i+=iLenTo;

s+ =iLenFrom;

}

else

{

  strTemp[i++] =*s;

s++;

}

}

strTemp[i] =0;

lr_save_string(strTemp,strParam);

}

//how  to call replace function

strSource= lr_eval_string("{c_ESS}");

lr_save_string(strSource,"c_ESS_New");

Replace(strSource,"&#x21", "!","c_ESS_New");

Server has shut down the connection prematurely

Server has shut down the connection prematurely

First thing "Server xyz has shut down the connection prematurely " is not a webserver issue.
This is purely loadrunner issue and is one of the major pain area.

Solutions:
1. Make sure we are not ramping up all user simultaneously
2. Rendez point are not holding up too many users.
3. Make sure retry option is greater than 5
4. Check network connectivity or blockage.
5. Decrease the load from loadrunner machine
6. Clear the Temp folder in (Documents and Settings-->user-->Local Settings)-->Temp
    and restart the machine on which loadrunner is installed (This one is my favorite, it has always helped me in getting rid from this error, but the condition is that scripts ran successfully before and now you suddenly start seeing this error)
7. If above solution also doesn't work then, Recently I observed that if we suddenly start seeing this issue, then best option is to restart all machines and servers in your network or load test domain (after following point No. 6) .

Put this in script, not a solution but just the workaround, you will not see error, but issue will still exist
web_set_sockets_option ("NEW_BEHAVIOR_OF_OVERLAPPED_SEND", "1");
If none of the above option helps then put web_set_sockets_option("IGNORE_PREMATURE_SHUTDOWN", "1");  in vuser_init()

You can also try following
Run time settings --> Preferences --> Use WinInet Replay instead of Sockets (windows only)
but it worked in very specific cases. Not a general solution.

How to put strtok function in a vugen script

put the logic after the co-related string

strtok is used when you get a long value from load runner seperated by delimiters for example,( and you want to seperate each value from the delimiters

logic()
{

extern char *strtok(char * string,const char * delimiters); // explicit declaration

char seperators[]= "(,";

char *token;

char c[100];
char * a[100];
char * d[100];
int i=0;

strcpy(c,lr_eval_string("{c_ContentGUID}"));

token= (char *) strtok(c,seperators); //Get the first token

if(!token)
{

lr_output_message("No token found in the string");

return (-1);

}

for(i=0; token !=NULL;i++)
{
 a[i]=token;

lr_output_message("%s", a[i]);

token= (char *) strtok(c,seperators); // get the next token

}

lr_save_string( a[6],"c_ContentGUID");

lr_save_string( a[5],"c_fgfgh");

lr_save_string( a[2],"c_xyz");
lr_save_string( a[1],"c_sret");

lr_output_message("c_ContentGUID : %s", lr_eval_string("{c_ContentGUID}"));


return 0;

}

WEB services Soap UI

Web services is a way of communication between two softwares .

For example Software one calling to a function of another software

medium will be Internel/LAN and http protocol, and i/p and o/p will be saved in SOAP(Simple object Access protocol)

Client is service consumer and server is service provider, to access the server you should know the location of the webservices server and information about the server functions.


If service provider knows the client,it will directly give the xml(WSDL file)

second way is through UDDI,first all the service provide register on UDDI

Server->xml(WSDL)->UDDI->xml(UDDI)->Client

WEB services are two types

1.SOAP based
2. REST based

In REST client send a request to server using URI and server return the response in terms of resources for example-HTML,plain test etc

How to save vugen co-related value in a file

In case you face such scenario in which you need to save your co-related value in a file.

For example

web_reg_save_param("c_Incident","LB=abc", "RB=def", LAST);

// call this function wherever you want to save your co-related value
writeInfoToFile();

void writeInfoToFile();
{
           long File_Stream;
Char *Filename="D:\\Incident.txt";
//Open the file with read access

If((File_Stream= Fopen(Filename,"a+"))==NULL)
{
lr_error_message("Can't open %s ", Filename);
}

fprintf(File_Stream,"\r\n%s", lr_eval_string("{c_Incident}"));


//Close the file
If(fclose (File_stream))
{
 lr_error_message(error close file %s ",Filename);
}
}