I can not take a value from the header in the Controller in Spring Boot

user_18100193 0
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I have built a web application in Spring Boot that has a form and besides the values from the form that it inserts in the database it takes from the header the username. This is the code from the Controller:

@PostMapping("/BilantErr/")
public String postIndex(@RequestParam(name = "cui") String cui, @RequestParam(name = "an_raportare") String anRaportare,
    @RequestParam(name = "perioada") String perioada,
    @RequestHeader("iv-user") String operator, @RequestParam(name = "motivatie") String motivatie, Model model) {

    String page = "";
    //String operator = "serban";
    try {
        if (repository.insert(cui, anRaportare, operator, motivatie, perioada) == true) {
            page = "success";
        } else {
            page = "error";
        }
    } catch (Exception e) {
        Logger logger = LoggerFactory.getLogger(BilantErr.class);
    }
    return page;
}

The error that I am getting is : Resolved [org.springframework.web.bind.MissingRequestHeaderException: Required request header 'iv-user' for method parameter type String is not present]

What may be the problem ? There is an application already built in JSF that works and takes the user from the header and I have to replace it with a Spring app. What am I doing wrong ? Thanks

request-headers spring-boot response-headers spring java
2 Answers

MissingRequestHeaderException means the HTTP request doesn't contain a "iv-user" header. You must have a look to your request first. You can read all headers of the HTTP request by following code snippet:

@GetMapping("/listHeaders")
public ResponseEntity<String> multiValue(
  @RequestHeader MultiValueMap<String, String> headers) {
    headers.forEach((key, value) -> {
        LOG.info(String.format(
          "Header '%s' = %s", key, value.stream().collect(Collectors.joining("|"))));
    });
        
    return new ResponseEntity<String>(
      String.format("Listed %d headers", headers.size()), HttpStatus.OK);
}
user_54854540

The request header "iv-user" is required but does not seem to be present in the request you receive. You could fix your request or make the header optional: @RequestHeader(value = "iv-user", required = false)

user_12352170
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