{"id":256549,"date":"2024-06-19T17:04:07","date_gmt":"2024-06-19T17:04:07","guid":{"rendered":"https:\/\/namso-gen.co\/blog\/?p=256549"},"modified":"2024-06-19T17:04:07","modified_gmt":"2024-06-19T17:04:07","slug":"how-to-capture-dynamic-value-in-loadrunner","status":"publish","type":"post","link":"https:\/\/namso-gen.co\/blog\/how-to-capture-dynamic-value-in-loadrunner\/","title":{"rendered":"How to capture dynamic value in LoadRunner?"},"content":{"rendered":"<p>How to capture dynamic value in LoadRunner?<\/p>\n<p>LoadRunner is a powerful tool used for performance testing and analyzing the behavior of applications under different load conditions. One important aspect of performance testing is capturing dynamic values, such as session IDs, CSRF tokens, or user-specific data, that are generated by the server and need to be correctly extracted and utilized in subsequent requests. In this article, we will explore how to capture dynamic values in LoadRunner effectively.<\/p>\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_62 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title \" >Table of Contents<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Toggle Table of Content\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/namso-gen.co\/blog\/how-to-capture-dynamic-value-in-loadrunner\/#1_What_are_dynamic_values_in_LoadRunner\" title=\"1) What are dynamic values in LoadRunner?\">1) What are dynamic values in LoadRunner?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/namso-gen.co\/blog\/how-to-capture-dynamic-value-in-loadrunner\/#2_Why_do_we_need_to_capture_dynamic_values\" title=\"2) Why do we need to capture dynamic values?\">2) Why do we need to capture dynamic values?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/namso-gen.co\/blog\/how-to-capture-dynamic-value-in-loadrunner\/#3_How_can_we_identify_dynamic_values_in_LoadRunner\" title=\"3) How can we identify dynamic values in LoadRunner?\">3) How can we identify dynamic values in LoadRunner?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/namso-gen.co\/blog\/how-to-capture-dynamic-value-in-loadrunner\/#4_What_are_the_different_methods_to_capture_dynamic_values_in_LoadRunner\" title=\"4) What are the different methods to capture dynamic values in LoadRunner?\">4) What are the different methods to capture dynamic values in LoadRunner?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/namso-gen.co\/blog\/how-to-capture-dynamic-value-in-loadrunner\/#5_How_does_the_web_reg_save_param_function_work\" title=\"5) How does the web_reg_save_param function work?\">5) How does the web_reg_save_param function work?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/namso-gen.co\/blog\/how-to-capture-dynamic-value-in-loadrunner\/#6_How_can_we_use_web_reg_save_param_to_capture_dynamic_values\" title=\"6) How can we use web_reg_save_param to capture dynamic values?\">6) How can we use web_reg_save_param to capture dynamic values?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/namso-gen.co\/blog\/how-to-capture-dynamic-value-in-loadrunner\/#7_What_is_the_difference_between_web_reg_save_param_and_web_reg_save_param_regexp\" title=\"7) What is the difference between web_reg_save_param and web_reg_save_param_regexp?\">7) What is the difference between web_reg_save_param and web_reg_save_param_regexp?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/namso-gen.co\/blog\/how-to-capture-dynamic-value-in-loadrunner\/#8_How_can_we_capture_a_value_using_web_reg_save_param_regexp\" title=\"8) How can we capture a value using web_reg_save_param_regexp?\">8) How can we capture a value using web_reg_save_param_regexp?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/namso-gen.co\/blog\/how-to-capture-dynamic-value-in-loadrunner\/#9_How_can_web_reg_save_param_ex_be_used_to_capture_dynamic_values\" title=\"9) How can web_reg_save_param_ex be used to capture dynamic values?\">9) How can web_reg_save_param_ex be used to capture dynamic values?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/namso-gen.co\/blog\/how-to-capture-dynamic-value-in-loadrunner\/#10_What_is_web_reg_save_param_ext_used_for\" title=\"10) What is web_reg_save_param_ext used for?\">10) What is web_reg_save_param_ext used for?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/namso-gen.co\/blog\/how-to-capture-dynamic-value-in-loadrunner\/#11_Can_we_capture_dynamic_values_from_cookies\" title=\"11) Can we capture dynamic values from cookies?\">11) Can we capture dynamic values from cookies?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-12\" href=\"https:\/\/namso-gen.co\/blog\/how-to-capture-dynamic-value-in-loadrunner\/#12_Is_there_a_way_to_handle_dynamic_values_that_are_generated_on_the_client-side_using_JavaScript\" title=\"12) Is there a way to handle dynamic values that are generated on the client-side using JavaScript?\">12) Is there a way to handle dynamic values that are generated on the client-side using JavaScript?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-13\" href=\"https:\/\/namso-gen.co\/blog\/how-to-capture-dynamic-value-in-loadrunner\/#Conclusion\" title=\"Conclusion:\">Conclusion:<\/a><\/li><\/ul><\/nav><\/div>\n<h3><span class=\"ez-toc-section\" id=\"1_What_are_dynamic_values_in_LoadRunner\"><\/span>1) What are dynamic values in LoadRunner?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>\nDynamic values are server-generated data that needs to be extracted and used in subsequent requests to maintain the continuity of a user session.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"2_Why_do_we_need_to_capture_dynamic_values\"><\/span>2) Why do we need to capture dynamic values?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>\nCapturing dynamic values is crucial for accurately simulating real-life user scenarios during performance testing. Without capturing and using these values correctly, the script may fail to mimic user interactions accurately.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"3_How_can_we_identify_dynamic_values_in_LoadRunner\"><\/span>3) How can we identify dynamic values in LoadRunner?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>\nDynamic values usually come in response to certain user actions, such as logging in or submitting a form. These values are often found within response bodies, cookies, or HTTP headers.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"4_What_are_the_different_methods_to_capture_dynamic_values_in_LoadRunner\"><\/span>4) What are the different methods to capture dynamic values in LoadRunner?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>\nLoadRunner provides several built-in methods to capture dynamic values, including web_reg_save_param, web_reg_save_param_regexp, web_reg_save_param_ex, and web_reg_save_param_ext.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"5_How_does_the_web_reg_save_param_function_work\"><\/span>5) How does the web_reg_save_param function work?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>\nThe web_reg_save_param function is a LoadRunner function that enables capturing dynamic data. It extracts a value from a server response and saves it in a parameter for later use.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"6_How_can_we_use_web_reg_save_param_to_capture_dynamic_values\"><\/span>6) How can we use web_reg_save_param to capture dynamic values?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>\nTo capture dynamic values using web_reg_save_param, you need to identify the left and right boundaries within the server response that enclose the desired value. LoadRunner then automatically extracts the value between these boundaries and saves it for future use.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"7_What_is_the_difference_between_web_reg_save_param_and_web_reg_save_param_regexp\"><\/span>7) What is the difference between web_reg_save_param and web_reg_save_param_regexp?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>\nWhile web_reg_save_param uses left and right boundaries to capture dynamic values, web_reg_save_param_regexp allows you to use regular expressions to precisely define the pattern of the value you want to capture.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"8_How_can_we_capture_a_value_using_web_reg_save_param_regexp\"><\/span>8) How can we capture a value using web_reg_save_param_regexp?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>\nTo capture a value using web_reg_save_param_regexp, you need to define a regular expression pattern that uniquely identifies the desired value within the server response.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"9_How_can_web_reg_save_param_ex_be_used_to_capture_dynamic_values\"><\/span>9) How can web_reg_save_param_ex be used to capture dynamic values?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>\nweb_reg_save_param_ex is an advanced function that allows you to capture multiple occurrences of a dynamic value from a single server response and store them in separate parameters.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"10_What_is_web_reg_save_param_ext_used_for\"><\/span>10) What is web_reg_save_param_ext used for?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>\nweb_reg_save_param_ext is another variant of the web_reg_save_param function that captures dynamic values with additional options like extracting values from headers or saving values as binary data.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"11_Can_we_capture_dynamic_values_from_cookies\"><\/span>11) Can we capture dynamic values from cookies?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>\nYes, LoadRunner provides the web_reg_save_param_cookie function specifically designed to extract dynamic values from cookies.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"12_Is_there_a_way_to_handle_dynamic_values_that_are_generated_on_the_client-side_using_JavaScript\"><\/span>12) Is there a way to handle dynamic values that are generated on the client-side using JavaScript?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>\nYes, LoadRunner offers the lr_eval_string and lr_eval_string_ext functions which allow you to evaluate JavaScript expressions directly in the script, making it possible to handle client-side generated dynamic values.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Conclusion\"><\/span>Conclusion:<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>\nCapturing dynamic values is a critical aspect of performance testing with LoadRunner. By using the appropriate functions such as web_reg_save_param, web_reg_save_param_regexp, and web_reg_save_param_ext, testers can accurately capture and utilize dynamic values in their scripts. This ensures realistic simulation of user actions and helps uncover any performance issues when load is applied to the application.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>How to capture dynamic value in LoadRunner? LoadRunner is a powerful tool used for performance testing and analyzing the behavior of applications under different load conditions. One important aspect of performance testing is capturing dynamic values, such as session IDs, CSRF tokens, or user-specific data, that are generated by the server and need to be &#8230; <\/p>\n<p class=\"read-more-container\"><a title=\"How to capture dynamic value in LoadRunner?\" class=\"read-more button\" href=\"https:\/\/namso-gen.co\/blog\/how-to-capture-dynamic-value-in-loadrunner\/#more-256549\">Read more<span class=\"screen-reader-text\">How to capture dynamic value in LoadRunner?<\/span><\/a><\/p>\n","protected":false},"author":65,"featured_media":107420,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[86279],"tags":[],"class_list":["post-256549","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-learn","no-featured-image-padding"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v22.1 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>How to capture dynamic value in LoadRunner?<\/title>\n<meta name=\"description\" content=\"How to capture dynamic value in LoadRunner? 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