Request method 'POST' not supported. The form cannot submit a valid request?-CodePudding

There is a Spring project with a single POST request and it doesn't work as it should.

Сontroller:

@Controller
public class RecipeController {

    @Autowired
    private RecipeRepository recipeRepository;

    @GetMapping("/recipes")
    public String recipes(Model model) {
        Iterable<Recipe> recipes = recipeRepository.findAll();
        model.addAttribute("recipes", recipes);

        return "recipes";
    }

    @GetMapping("/recipes/new-recipe")
    public String createRecipe(Model model) {
        return "new-recipe";
    }

    @PostMapping("/recipe/new-recipe")
    public String addNewRecipe(@RequestParam String title, @RequestParam String description, @RequestParam String ingredient, @RequestParam String fullText, Model model) {
        Recipe recipe = new Recipe(title, description, ingredient, fullText);
        recipeRepository.save(recipe);

        return "redirect:/recipes";
    }

}

When making a POST request through this form:

     <form action="/recipes/new-recipe/add" method="post">
        <div >
            <label for="title">Якою буде назва вашої страви:</label>
            <input type="text"  id="title" name = "title" placeholder="Введіть назву">
        </div>

        <div >
            <label for="description">Опишіть вашу страву:</label>
            <textarea  id="description" name = "description" rows="2"></textarea>
        </div>
        <div >
            <label for="ingredients">Які інгрідієнти ви використаєте:</label>
            <textarea  id="ingredients" name = "ingredients" rows="4"></textarea>
        </div>
        <div >
            <label for="recipe">Рецепт страви:</label>
            <textarea  id="recipe" name = "fullText" rows="6"></textarea>
        </div>
        <div >
            <button type="submit" >Створити рецепт</button>
        </div>
    </form>

I am getting this problem:

 Whitelabel Error Page
This application has no explicit mapping for /error, so you are seeing this as a fallback.

Sun Apr 17 04:56:48 EEST 2022
There was an unexpected error (type=Method Not Allowed, status=405).
Request method 'POST' not supported
org.springframework.web.HttpRequestMethodNotSupportedException: Request method 'POST' not supported
    at org.springframework.web.servlet.mvc.method.RequestMappingInfoHandlerMapping.handleNoMatch(RequestMappingInfoHandlerMapping.java:253)
    at org.springframework.web.servlet.handler.AbstractHandlerMethodMapping.lookupHandlerMethod(AbstractHandlerMethodMapping.java:442)
    at org.springframework.web.servlet.handler.AbstractHandlerMethodMapping.getHandlerInternal(AbstractHandlerMethodMapping.java:383)
    at org.springframework.web.servlet.mvc.method.RequestMappingInfoHandlerMapping.getHandlerInternal(RequestMappingInfoHandlerMapping.java:125)
    at org.springframework.web.servlet.mvc.method.RequestMappingInfoHandlerMapping.getHandlerInternal(RequestMappingInfoHandlerMapping.java:67)
    at org.springframework.web.servlet.handler.AbstractHandlerMapping.getHandler(AbstractHandlerMapping.java:498)
    at org.springframework.web.servlet.DispatcherServlet.getHandler(DispatcherServlet.java:1261)
    at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:1043)
    at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:963)
    at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1006)
    at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:909)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:681)
    at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:883)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:764)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:227)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162)
    at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162)
    at org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:100)
    at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:117)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162)
    at org.springframework.web.filter.FormContentFilter.doFilterInternal(FormContentFilter.java:93)
    at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:117)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162)
    at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:201)
    at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:117)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162)
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:197)
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:97)
    at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:541)
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:135)
    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92)
    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:78)
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:360)
    at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:399)
    at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:65)
    at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:889)
    at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1743)
    at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)
    at org.apache.tomcat.util.threads.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1191)
    at org.apache.tomcat.util.threads.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:659)
    at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
    at java.lang.Thread.run(Thread.java:748)

And the thing is that I was thinking that let's say the request blocks csrf, but when I added it to the form in the form: <input type="hidden" th:name="${_csrf.parameterName}" th:value="${_csrf.token}" />

All the same error, then I tried to make a POST request via curl: curl --request POST http://localhost:8081/recipe/new-recipe -d "title=title&description=decri&ingredient=tomate&fullText=cook" And I succeeded and the record was added to the database.

I have already tried a lot of things and the method itself changed the parameters, removed bootstrap from the markup, nothing helped. I can assume the problem is in the HTML, but I did not find anything in this regard. But I noticed that the problem is when I work through the form. With the request and its processing, everything seems to be normal.

CodePudding user response：

Check if it is a mistype, your annotation is /recipe/new-recipe and your form is /recipes/new-recipe/add with add. They should be equal.

@PostMapping("/recipe/new-recipe")

<form action="/recipes/new-recipe/add" method="post">

CodePudding user response：

In addition to @Shura16's answer, please change

name = "ingredients"

name = "ingredient"