Return HTTP Error 401 Code & Skip Filter Chains

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Using a custom Spring Security filter, I'd like to return an HTTP 401 error code if the HTTP Header doesn't contain a particular key-value pair.

Example:

public void doFilter(ServletRequest req, ServletResponse res,
                     FilterChain chain) throws IOException, ServletException {

   HttpServletRequest request = (HttpServletRequest) req;
   final String val = request.getHeader(FOO_TOKEN)

   if(val == null || !val.equals("FOO")) {
       // token is not valid, return an HTTP 401 error code
       ...
   }
   else {
    // token is good, let it proceed
    chain.doFilter(req, res);
   }

As I understand, I could do the following:

(1) ((HttpServletResponse) res).setStatus(401) and skip the remaining filter chain

OR

(2) throw an exception that, eventually, results in Spring Security throwing a 401 error to the client.

If #1 is the better option, how can I skip the filter chain after calling setStatus(401) on the response?

Or, if #2 is the right way to go, which exception should I throw?

401 Unauthorized Error: What It Is and How to Fix It, The 401 Unauthorized Error is an HTTP response status code the 401 Unauthorized Error , and returning it as the HTTP response code to the� Using a custom Spring Security filter, I'd like to return an HTTP 401 error code if the HTTP Header doesn't contain a particular key-value pair. public void doFilter (ServletRequest req, ServletResponse res, FilterChain chain) throws IOException, ServletException { HttpServletRequest request = (HttpServletRequest) req; final String val = request.getHeader (FOO_TOKEN) if (val == null || !val.equals ("FOO")) { // token is not valid, return an HTTP 401 error code } else { // token is

I suggest this solution below.

public void doFilter(ServletRequest req, ServletResponse res,
                         FilterChain chain) throws IOException, ServletException {

        HttpServletRequest request = (HttpServletRequest) req;
        final String val = request.getHeader(FOO_TOKEN)

        if (val == null || !val.equals("FOO")) {
            ((HttpServletResponse) response).sendError(HttpServletResponse.SC_UNAUTHORIZED, "The token is not valid.");
        } else {
            chain.doFilter(req, res);
        }
    }

401 Unauthorized — httpstatuses.com, HTTP Status Code 401: The request has not been applied because it lacks valid The server generating a 401 response MUST send a WWW-Authenticate� The HTTP 401 Unauthorized client error status response code indicates that the request has not been applied because it lacks valid authentication credentials for the target resource. This status is sent with a WWW-Authenticate header that contains information on how to authorize correctly.

Just do as they say in the upper answer. "so setting the response status code and returning immediately" This is just type:

res.setStatus(HttpServletResponse.SC_UNAUTHORIZED);  
return;

HTTP/1.1: Status Code Definitions, This code is similar to 401 (Unauthorized), but indicates that the client must first authenticate itself with the proxy. The proxy MUST return a Proxy-Authenticate� The 401 Unauthorized error is an HTTP status code that means the page you were trying to access cannot be loaded until you first log in with a valid user ID and password. If you've just logged in and received the 401 Unauthorized error, it means that the credentials you entered were invalid for some reason.

So you can use something like this.

@Override
public void doFilter() {
    if (whiteListOrigins.contains(incomeOrigin)) {
        httpResponse.setHeader("Access-Control-Allow-Origin", incomeOrigin);
        chain.doFilter(request, response);
    } else {
        ((HttpServletResponse) response).sendError(HttpServletResponse.SC_FORBIDDEN, "Not Allowed to Access. Please try with valid Origin.");
    }
}

How to Quickly Fix the 401 Unauthorized Error (5 Methods), Status-Line = HTTP-Version SP Status-Code SP Reason-Phrase CRLF The information returned with the response is dependent on the method used in A 401 error response indicates that the client tried to operate on a� For error status codes like 401, use the more specific sendError (): httpResponse.sendError(HttpServletResponse.SC_UNAUTHORIZED, "your message goes here"); This takes care of everything, it sets the status code and also writes the response.

HTTP Status Codes, The 401 Unauthorized Error is HTTP status code error that represented the request sent by the client to the server lacks valid authentication� This is a list of Hypertext Transfer Protocol (HTTP) response status codes. Status codes are issued by a server in response to a client's request made to the server. It includes codes from IETF Request for Comments (RFCs), other specifications, and some additional codes used in some common applications of the HTTP.

How to Fix a 401 Unauthorized Error?, But if the authorization header is malformed it will return a 401. For example, you might have a JWT (JSON Web Token) you want to include in the� return Unauthorized(); return Unauthorized(object value); To pass info to the client you can do a call like this: return Unauthorized(new { Ok = false, Code = Constants.INVALID_CREDENTIALS, }); On the client besides the 401 response you will have the passed data too. For example on most clients you can await response.json() to get it.

HTTP 401 Error vs HTTP 403 Error – Status Code Responses , 401 means "Unauthorized", so there must be something with your credentials. I think that java URL does not support the syntax you are� The 401 Unauthorized Error is HTTP status code error that represented the request sent by the client to the server lacks valid authentication credentials. It may be represented as 401 Unauthorized, Authorization required, HTTP error 401- Unauthorised. It represents that the request could not be authenticated.

Comments
  • If you return from the method after setStatus that stops further processing of the request. The filter chain only proceeds if you call chain.doFilter.
  • Thanks Luke. I'll try that. Post as answer? Also can you please post a reference so I can read more?
  • You might want to implement an AuthenticationEntryPoint like here: stackoverflow.com/questions/19767267/…
  • It works but it gives this error in the logs java.lang.IllegalStateException: Cannot call sendError() after the response has been committed.