Spring Boot POST request with missing request body?

Question

I have a very simple HTML form page (which is a part of Spring Boot web application in src/main/resources/public/web.html) to post a String from a textarea to a Spring Boot web application version 1.5.2.

<form action="" method="post"> <textarea cols="128" rows="40" name="query"></textarea> <input value="Send" type="submit"> </form>

And the SpringBoot class to handle the POST request:

@RestController public class QueryController { @RequestMapping(value = "/handle", method = RequestMethod.POST) protected void handlePost(@RequestBody String postBody) throws Exception { // Get query from postBody here } }

It works with small String from textarea in client. However, when the String is big (e.g: with HTTP request header: Content-Length:3789333 (3 MB)). Spring Boot throws an exception like this:

org.springframework.http.converter.HttpMessageNotReadableException: Required request body is missing: protected void QueryController.handlePost(java.lang.String) throws java.lang.Exception at org.springframework.web.servlet.mvc.method.annotation.RequestResponseBodyMethodProcessor.readWithMessageConverters(RequestResponseBodyMethodProcessor.java:154) at org.springframework.web.servlet.mvc.method.annotation.RequestResponseBodyMethodProcessor.resolveArgument(RequestResponseBodyMethodProcessor.java:128) at org.springframework.web.method.support.HandlerMethodArgumentResolverComposite.resolveArgument(HandlerMethodArgumentResolverComposite.java:121)

I'm not sure what causes this problem, I'm running the web application with embedded Tomcat from Spring Boot.

P. Edge · Accepted Answer · 2018-02-08 08:33:50Z

1

I'm not sure but could this be caused by missing the encoding of the content?

answered Feb 8, 2018 at 8:33

P. Edge

1051 gold badge2 silver badges7 bronze badges

Sign up to request clarification or add additional context in comments.

Comments

Bằng Rikimaru · Accepted Answer · 2018-02-08 08:57:53Z

The problem is @RequestBody cannot get value for the big query. However, get request body from HttpServletRequest it can get value

 protected void handlePost(HttpServletRequest httpServletRequest) throws Exception { String postBody = this.getPOSTRequestBody(httpServletRequest); }

Afsun Khammadli · Accepted Answer · 2018-02-08 08:56:28Z

Update your contoller to following:

@RestController public class QueryController { @RequestMapping(value = "/handle", method = RequestMethod.POST) protected void handlePost(@RequestParam(value="query",required=false) String query) throws Exception { // Your code goes here } }

If you do not pass paramater you will get org.springframework.web.bind.MissingServletRequestParameterException: Required String parameter 'query' is not present. If paramater not required you can add required=false to RequestParam. By default required=true for RequestParam.

It depends to your server. I hope your are using Tomcat. By default server has maxPostSize. The following is for Tomcat

<Connector port="8080" protocol="HTTP/1.1" connectionTimeout="20000" redirectPort="8443" maxPostSize="6291456" />

maxPostSize is 6MB in my preceding code.

Another error only when POST is big ] ExceptionHandlerExceptionResolver@189: Resolved exception caused by Handler execution: java.lang.NullPointerException ERROR [09:39:24] ExceptionAdvice@57: Catched an exception: org.springframework.web.bind.MissingServletRequestParameterException: Required String parameter 'query' is not present
It doesn't work either, thanks for your trying, I'm not uploading file.

Collectives™ on Stack Overflow

Spring Boot POST request with missing request body?

3 Answers 3

Comments

Comments

4 Comments

Hot Network Questions

Collectives™ on Stack Overflow

3 Answers 3

Comments

Comments

4 Comments

Related