Question about JS WebService Chart Image Genration

[teamireport]

HI Folks,

I have a question on how the chart image get genrating in webservice call.

I have implemented webservices in my php webapplication and reports are calling from Jasperserver running on separate instance via webservice.For this webservice implementation have used web service php-sample shipped in jasperserver.

Calling the reports and showing in the application is woking cool. the issue that facings is chart are storing as a images in machine and displaying perfectly..But in some cases the chart images are not changing i mean previuos reports chart is showing for other chart too..I mean the issue is browser cache ,for this i have handled browser cache in executereport.php file.

Eventhough reports images are still in cache and also i seeing images files are genrating randomly witj same file name for  example (img_0_0_1 , img_0_0_35, )

 

My Question is how this images are getting generated, since it genrating from jasperserver side.how i need to resolve it.?

any suggestion /ideas much appreciated ?