dongfangtianyu opened a new issue, #6250: URL: https://github.com/apache/jmeter/issues/6250
### Expected behavior HTTP Header ```http Content-Type: multipart/form-data; boundary=2W1aSJ1TtJC_jRaGnbotI-RaHchFMAO ``` ### Actual behavior HTTP Header ```http Content-Type: multipart/form-data; boundary=2W1aSJ1TtJC_jRaGnbotI-RaHchFMAO; charset=UTF-8 ``` ### Steps to reproduce the problem In JMeter 5.6.3, the request header `Content-Type` for `multipart/form-data` is **required** to include `; charset=`.  On some web server implementations, including `charset` in the request header `Content-Type` of `multipart/form-data` can result in parsing errors of the `boundary`, leading to a failure in sending form content. Example 1: [https://github.com/spring-projects/spring-framework/issues/21599](https://github.com/spring-projects/spring-framework/issues/21599) Example 2: [https://bz.apache.org/bugzilla/show_bug.cgi?id=61384](https://bz.apache.org/bugzilla/show_bug.cgi?id=61384) According to the latest RFC specifications, such implementations are incorrect: In RFC 2046 [4.1.2] : - For text and its subtypes (e.g., `text/plain`), the `charset` parameter should be passed in the `Content-Type`. - i.e., The HTTP body is entirely composed of characters specified in the charset. **`multipart/form-data` does not belong to the `text` subtype, and the HTTP body may contain both text and binary data.** In RFC 7578 [5.1.2], rules for form encoding (`form-charset`) are defined: 1. If `multipart/form-data` specifies a charset, it should be located in the HTTP body rather than the HTTP header. 2. If charset is not specified for `multipart/form-data`, UTF-8 is used by default. **Therefore, HTTP headers like the following are non-compliant with the specification (and cause errors in some web server behaviors):** ```http Content-Type: multipart/form-data; boundary=2W1aSJ1TtJC_jRaGnbotI-RaHchFMAO; charset=UTF-8 ``` **Interestingly, this HTTP header is also non-compliant with the specification (but doesn't cause errors as it lacks a boundary):** ```http Content-type: application/json; charset=utf-8 ``` I am not yet familiar with JMeter. If my idea is wrong, please remind me and close this issue. Thank you. ### JMeter Version 5.6.3 ### Java Version 17 ### OS Version _No response_ -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: dev-unsubscr...@jmeter.apache.org.apache.org For queries about this service, please contact Infrastructure at: us...@infra.apache.org
