index.html is not showing up (Request method 'GET' not supported)

Question

Note: The code can be found here: https://github.com/silentsnooc/ema-server

So, I am cleaning up a quite messy project in which I try to serve static content as well as a small REST API. However, the application gets started as any other:

@SpringBootApplication
public class Server {
    public static void main(String[] args) {
        SpringApplication.run(Server.class, args);
    }
}

The REST API works for me but the web client is not. I've moved the web client resources into src/main/resources/static/

However, if I visit http://localhost:8080 what I get is 405 (Request method 'GET' not supported).

org.springframework.web.HttpRequestMethodNotSupportedException: Request method 'GET' not supported
    at org.springframework.web.servlet.mvc.method.RequestMappingInfoHandlerMapping.handleNoMatch(RequestMappingInfoHandlerMapping.java:207) ~[spring-webmvc-4.3.6.RELEASE.jar:4.3.6.RELEASE]
    at org.springframework.web.servlet.handler.AbstractHandlerMethodMapping.lookupHandlerMethod(AbstractHandlerMethodMapping.java:374) ~[spring-webmvc-4.3.6.RELEASE.jar:4.3.6.RELEASE]
    at org.springframework.web.servlet.handler.AbstractHandlerMethodMapping.getHandlerInternal(AbstractHandlerMethodMapping.java:314) ~[spring-webmvc-4.3.6.RELEASE.jar:4.3.6.RELEASE]
    at org.springframework.web.servlet.handler.AbstractHandlerMethodMapping.getHandlerInternal(AbstractHandlerMethodMapping.java:61) ~[spring-webmvc-4.3.6.RELEASE.jar:4.3.6.RELEASE]
    at org.springframework.web.servlet.handler.AbstractHandlerMapping.getHandler(AbstractHandlerMapping.java:352) ~[spring-webmvc-4.3.6.RELEASE.jar:4.3.6.RELEASE]
    at org.springframework.web.servlet.DispatcherServlet.getHandler(DispatcherServlet.java:1145) ~[spring-webmvc-4.3.6.RELEASE.jar:4.3.6.RELEASE]
    at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:936) ~[spring-webmvc-4.3.6.RELEASE.jar:4.3.6.RELEASE]
    at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:897) ~[spring-webmvc-4.3.6.RELEASE.jar:4.3.6.RELEASE]
    at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:970) [spring-webmvc-4.3.6.RELEASE.jar:4.3.6.RELEASE]
...

I do not understand what's missing - maybe I got the folder structure wrong?

Please let me know if you need any further information from my side.

Stefan Falk · Accepted Answer · 2018-02-23 17:45:53Z

2

As stated here @RestController is itself annotated with @ResponseBody which makes the response of your RequestMapping methods to be their return value. In your case that is the index.html string you're seeing in the web browser.

Replacing the @RestController annotation with @Controller should do the trick.

As for your error you have another class WordEmbeddingRestController which defines mappings for "/" as well, as "/" (or "" to be exact) is the default path value. Removing the @RestController annotation from this class will enable you to GET the desired html file.

Ignore that, GET is the default method if non was specified

~~For your edit:~~

You have to add the method you want to support to the @RequestMapping annotation for each of your methods. See this for more information. As an example:

@RequestMapping(path = "/", method = RequestMethod.GET) public String index() { return "index.html"; }

Instead of using @RequestMapping with an explicit method you can also use shorthand annotations like @GetMapping and @PostMapping. Using these would reduce your code to someting like this:

@GetMapping("/") public String index() { return "index.html"; }

edited Feb 23, 2018 at 17:45

Stefan Falk

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answered Feb 22, 2018 at 19:08

Florian Cramer

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7 Comments

Stefan Falk Over a year ago

That definitely sounds correct. However, visiting localhost:8080 will still give me back a 405 error .. The log message (on the server) would be Request method 'GET' not supported

Stefan Falk Over a year ago

Do I actually need this index() endpoint? Shouldn't the application serve that by default? It's said that it looks automatically in static/, public/, etc in order to look for such content.

Stefan Falk Over a year ago

In any case: I just tried GetMapping("/") - unfortunately with the same result. :/

Stefan Falk Over a year ago

Btw. I have pushed the code to github.com/silentsnooc/ema-server

Florian Cramer Over a year ago

You do not actually need the mapping if you just want to serve static files. You only need it if you (as an example) want to fill in a template file instead of always serving the same static file. As for your error you have another class WordEmbeddingRestController which defines mappings for "/" as well, as "/" (or "" to be exact) is the default path value. Removing the @RestController annotation from this class will enable you to GET the desired html file.

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