Bug 63129

Created attachment 36401 [details]
Application to reproduce the scenario.

Overview: When we post the Japanese characters from browser using JMeter HTTP(s) Test Script Recorder, we get garbage value in response when we post the request first time. However, if we post the same request again, we get actual output. So, from second execution onward it starts working fine.	

Cause of bug: JMeter is getting encoding as null in HTTP request. When JMeter gets encoding as null, it uses default encoding (UTF-8). therefore returning garbage value when encoding/decoding of characters(e.g. Japanese characters) other than UTF-8. However, JMeter records encoding when response comes from the web server, so it  starts working when we traverse same page again.

Impact of bug:
1. When End User traverse the page first time and posts any character String other than UTF-8 using JMeter proxy. End user gets garbage value in response of his first request. E.g. Shift-JIS characters are not supported by UTF-8 and return garbage value.
2. Many Japanese company uses JMeter for performance testing of their project So Whenever Japanese engineer, uses JMeter for their performance testing they did not get actual result after first request.

Reproduce condition: 

1. Page Encoding should be Shift_JIS.
2. Request  and response page encoding should be same.
3. Form method should be POST.

Steps to reproduce: 

Setup 
1. Deploy Application "jmeter_issue_Encoding_Store"(extract in apache-tomcat-9.0.12\webapps) in Tomcat and start the tomcat(execute "apache-tomcat-9.0.12\bin\startup.bat" .
2. Open the browser and change Proxy settings -> LAN Setting and set Address(eg: localhost) and port(e.g.8888).
3. Run JMeter
	3.1 click on file menu-> open ->open the attached "Test Plan.jmx" file.
	3.2 Set the same port number in “HTTP(s) Test Script Recorder” and in browser’s Network LAN Settings.
	3.3 Go to JMeter HTTP(s) Test Script Recorder -> Click Start -> Ok
	

Execution
1. Go to browser , open application (e.g. http://localhost:portNumber/jmeter_issue_Encoding_Store/index.jsp)

2. Click on Submit Button.
 
3. View result in browser.
Resultant Output: It is garbage text:  ?ｿｽ?ｿｽ?ｿｽ?ｿｽ?ｿｽl?ｿｽ?ｿｽ?ｿｽs
 
Expected Result: 初期大阪
Actual Result: ?ｿｽ?ｿｽ?ｿｽ?ｿｽ?ｿｽl?ｿｽ?ｿｽ?ｿｽs

4. click on "Back to previous page" and click on "Submit" button again.
5. View the result in browser, this time getting the actual result.

Expected Result: 初期大阪
Actual Result: 初期大阪