[CAMEL-19500] HttpMessage#getBody(Map.class) doesn't parse the regular web form POST

• Type: Bug
• Status: Resolved
• Priority: Minor
• Resolution: Information Provided
• Affects Version/s: 3.20.4
• Component/s: came-core, camel-jetty

Environment

$ lsb_release -d
Description:    Ubuntu 22.04.2 LTS

$ java --version
openjdk 19.0.1 2022-10-18
OpenJDK Runtime Environment GraalVM CE 22.3.0 (build 19.0.1+10-jvmci-22.3-b08)
OpenJDK 64-Bit Server VM GraalVM CE 22.3.0 (build 19.0.1+10-jvmci-22.3-b08, mixed mode, sharing) 

• Estimated Complexity: Moderate

Language

java

• Assignee: Unassigned
• Reporter: Fyodor Kravchenko
• Created: 24/Jun/23 19:49
• Updated: 04/Apr/24 13:00
• Resolved: 28/Jun/23 05:47

Description

In Camel 2, when the form was submitted, the payload was able to be presented as a java.util.Map like this:

 

Map map = httpMessage.getBody(Map.class);

In Camel 3.20.4 this doesn't work.

 

I've created a little github project to demonstrate and reproduce the error. In the project's pom.xml file you can easily switch the Camel versions to see how version 2.24.0 behaves as expected in a true Camel manner, and 3.20.4 does not.

In essence, the code to check the behavior is like below. form.html is a simplest POST web form.

                        HttpMessage http = exchange.getIn(HttpMessage.class);
                        HttpServletRequest request = http.getRequest();
                        String method = request.getMethod();
                        if ("POST".equals(method) || "PUT".equals(method)) {
                            Map map = http.getBody(Map.class);
                            String string = http.getBody(String.class);
                            http.setHeader(Exchange.CONTENT_TYPE, "text/plain");
                            http.setBody("json: " + mapper.writeValueAsString(map) + ", and string:" + string);
                        } else {
                            http.setHeader(Exchange.CONTENT_TYPE, "text/html");
http.setBody(this.getClass().getResourceAsStream("form.html"));
                        } 

It should print the jsonified form POST payload, but doesn't for the Camel 3.