CORS Angular and SpringBoot - request blocked

Multi tool use
Multi tool use












1















I have a problem that I don't seem to figure out.
I want to send a http request from my



Angular client:



const url = 'http://localhost:8080/api';
console.log(this.http.get(url).subscribe(data => this.greeting = data));


to SpringBoot backend where I use CORS annotation:



@CrossOrigin(origins = "http://localhost:4200/", maxAge = 3600)
@RequestMapping("/api/")
public Map<String,Object> home() {
Map<String,Object> model = new HashMap<String,Object>();
model.put("id", UUID.randomUUID().toString());
model.put("content", "Hello World");
return model;
}


but I'm getting an error that it's blocked and redirects me to login all the time.



Failed to load http://localhost:8080/api: Redirect from 'http://localhost:8080/api' to 'http://localhost:8080/login' has been blocked by CORS policy: No 'Access-Control-Allow-Origin' header is present on the requested resource. Origin 'http://localhost:4200' is therefore not allowed access. 


Is there a way to change that?



I appreciate any hint or help regarding this. I would like to understand why this problem is happening.










share|improve this question























  • Have you tried adding CORS to /login?

    – acdcjunior
    Apr 3 '18 at 0:37
















1















I have a problem that I don't seem to figure out.
I want to send a http request from my



Angular client:



const url = 'http://localhost:8080/api';
console.log(this.http.get(url).subscribe(data => this.greeting = data));


to SpringBoot backend where I use CORS annotation:



@CrossOrigin(origins = "http://localhost:4200/", maxAge = 3600)
@RequestMapping("/api/")
public Map<String,Object> home() {
Map<String,Object> model = new HashMap<String,Object>();
model.put("id", UUID.randomUUID().toString());
model.put("content", "Hello World");
return model;
}


but I'm getting an error that it's blocked and redirects me to login all the time.



Failed to load http://localhost:8080/api: Redirect from 'http://localhost:8080/api' to 'http://localhost:8080/login' has been blocked by CORS policy: No 'Access-Control-Allow-Origin' header is present on the requested resource. Origin 'http://localhost:4200' is therefore not allowed access. 


Is there a way to change that?



I appreciate any hint or help regarding this. I would like to understand why this problem is happening.










share|improve this question























  • Have you tried adding CORS to /login?

    – acdcjunior
    Apr 3 '18 at 0:37














1












1








1








I have a problem that I don't seem to figure out.
I want to send a http request from my



Angular client:



const url = 'http://localhost:8080/api';
console.log(this.http.get(url).subscribe(data => this.greeting = data));


to SpringBoot backend where I use CORS annotation:



@CrossOrigin(origins = "http://localhost:4200/", maxAge = 3600)
@RequestMapping("/api/")
public Map<String,Object> home() {
Map<String,Object> model = new HashMap<String,Object>();
model.put("id", UUID.randomUUID().toString());
model.put("content", "Hello World");
return model;
}


but I'm getting an error that it's blocked and redirects me to login all the time.



Failed to load http://localhost:8080/api: Redirect from 'http://localhost:8080/api' to 'http://localhost:8080/login' has been blocked by CORS policy: No 'Access-Control-Allow-Origin' header is present on the requested resource. Origin 'http://localhost:4200' is therefore not allowed access. 


Is there a way to change that?



I appreciate any hint or help regarding this. I would like to understand why this problem is happening.










share|improve this question














I have a problem that I don't seem to figure out.
I want to send a http request from my



Angular client:



const url = 'http://localhost:8080/api';
console.log(this.http.get(url).subscribe(data => this.greeting = data));


to SpringBoot backend where I use CORS annotation:



@CrossOrigin(origins = "http://localhost:4200/", maxAge = 3600)
@RequestMapping("/api/")
public Map<String,Object> home() {
Map<String,Object> model = new HashMap<String,Object>();
model.put("id", UUID.randomUUID().toString());
model.put("content", "Hello World");
return model;
}


but I'm getting an error that it's blocked and redirects me to login all the time.



Failed to load http://localhost:8080/api: Redirect from 'http://localhost:8080/api' to 'http://localhost:8080/login' has been blocked by CORS policy: No 'Access-Control-Allow-Origin' header is present on the requested resource. Origin 'http://localhost:4200' is therefore not allowed access. 


Is there a way to change that?



I appreciate any hint or help regarding this. I would like to understand why this problem is happening.







spring angular spring-boot






share|improve this question













share|improve this question











share|improve this question




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asked Apr 3 '18 at 0:33









Maciej CzarnotaMaciej Czarnota

3618




3618













  • Have you tried adding CORS to /login?

    – acdcjunior
    Apr 3 '18 at 0:37



















  • Have you tried adding CORS to /login?

    – acdcjunior
    Apr 3 '18 at 0:37

















Have you tried adding CORS to /login?

– acdcjunior
Apr 3 '18 at 0:37





Have you tried adding CORS to /login?

– acdcjunior
Apr 3 '18 at 0:37












4 Answers
4






active

oldest

votes


















1














You have error in your RequestMapping, as you have used @RequestMapping("/api/"), this will be evaluated as http://your_url/api//. Such mapping is not present in your controller, hence it is giving you CORS Origin error.



Just remove trailing / from @RequestMapping("/api/") so that it will be @RequestMapping("/api").



Your class should look like follows,



@RestController
@CrossOrigin(origins = "http://localhost:4200")
public class DemoController {

@RequestMapping(value = "/api", method = RequestMethod.GET)
public Map<String,Object> home() {
Map<String,Object> model = new HashMap<String,Object>();
model.put("id", UUID.randomUUID().toString());
model.put("content", "Hello World");
return model;
}
}





share|improve this answer


























  • Thank you it helped!! Thanks everyone for your help

    – Maciej Czarnota
    Apr 3 '18 at 19:41



















1














This is the problem with your server-side. all you will have to do is do a component in your server-side and it will solve the issue. or refer here



follow this code:



@Component
@Order(Ordered.HIGHEST_PRECEDENCE)
public class RequestFilter implements Filter {

public void doFilter(ServletRequest req, ServletResponse res, FilterChain chain) {
HttpServletResponse response = (HttpServletResponse) res;
HttpServletRequest request = (HttpServletRequest) req;

response.setHeader("Access-Control-Allow-Origin", "http://localhost:4200");
response.setHeader("Access-Control-Allow-Methods", "POST, PUT, GET, OPTIONS, DELETE");
response.setHeader("Access-Control-Allow-Headers", "x-requested-with");
response.setHeader("Access-Control-Max-Age", "3600");
response.setHeader("Access-Control-Allow-Credentials", "true");

if (!(request.getMethod().equalsIgnoreCase("OPTIONS"))) {
try {
chain.doFilter(req, res);
} catch(Exception e) {
e.printStackTrace();
}
} else {
System.out.println("Pre-flight");
response.setHeader("Access-Control-Allow-Methods", "POST,GET,DELETE");
response.setHeader("Access-Control-Max-Age", "3600");
response.setHeader("Access-Control-Allow-Headers", "authorization, content-type," +
"access-control-request-headers,access-control-request-method,accept,origin,authorization,x-requested-with");
response.setStatus(HttpServletResponse.SC_OK);
}

}
}





share|improve this answer































    0














    As you've chosen to annotate your app, you must provide the @CrossOrigin annotation for each method individually. That means you must also do:



    @CrossOrigin(origins = "http://localhost:4200/", maxAge = 3600)
    @RequestMapping("/login/")
    public Map<String,Object> login() {
    /* ... */
    }


    Reference: https://spring.io/guides/gs/rest-service-cors/#_enabling_cors






    share|improve this answer































      0














      Instead of annotating every method with @Crossorigin you can use a filter in web.xml as mentioned below



      Add Below filter to web.xml file.



       <filter>
      <filter-name>cors</filter-name>
      <filter-class>com.thetransactioncompany.cors.CORSFilter</filter-class>
      </filter>

      <filter-mapping>
      <filter-name>cors</filter-name>
      <url-pattern>/*</url-pattern>
      </filter-mapping>


      Dependency for the mentioned jar is given below.



      <dependency>
      <groupId>com.thetransactioncompany</groupId>
      <artifactId>cors-filter</artifactId>
      <version>2.5</version>
      </dependency>


      Thats it -Done.






      share|improve this answer























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        4 Answers
        4






        active

        oldest

        votes








        4 Answers
        4






        active

        oldest

        votes









        active

        oldest

        votes






        active

        oldest

        votes









        1














        You have error in your RequestMapping, as you have used @RequestMapping("/api/"), this will be evaluated as http://your_url/api//. Such mapping is not present in your controller, hence it is giving you CORS Origin error.



        Just remove trailing / from @RequestMapping("/api/") so that it will be @RequestMapping("/api").



        Your class should look like follows,



        @RestController
        @CrossOrigin(origins = "http://localhost:4200")
        public class DemoController {

        @RequestMapping(value = "/api", method = RequestMethod.GET)
        public Map<String,Object> home() {
        Map<String,Object> model = new HashMap<String,Object>();
        model.put("id", UUID.randomUUID().toString());
        model.put("content", "Hello World");
        return model;
        }
        }





        share|improve this answer


























        • Thank you it helped!! Thanks everyone for your help

          – Maciej Czarnota
          Apr 3 '18 at 19:41
















        1














        You have error in your RequestMapping, as you have used @RequestMapping("/api/"), this will be evaluated as http://your_url/api//. Such mapping is not present in your controller, hence it is giving you CORS Origin error.



        Just remove trailing / from @RequestMapping("/api/") so that it will be @RequestMapping("/api").



        Your class should look like follows,



        @RestController
        @CrossOrigin(origins = "http://localhost:4200")
        public class DemoController {

        @RequestMapping(value = "/api", method = RequestMethod.GET)
        public Map<String,Object> home() {
        Map<String,Object> model = new HashMap<String,Object>();
        model.put("id", UUID.randomUUID().toString());
        model.put("content", "Hello World");
        return model;
        }
        }





        share|improve this answer


























        • Thank you it helped!! Thanks everyone for your help

          – Maciej Czarnota
          Apr 3 '18 at 19:41














        1












        1








        1







        You have error in your RequestMapping, as you have used @RequestMapping("/api/"), this will be evaluated as http://your_url/api//. Such mapping is not present in your controller, hence it is giving you CORS Origin error.



        Just remove trailing / from @RequestMapping("/api/") so that it will be @RequestMapping("/api").



        Your class should look like follows,



        @RestController
        @CrossOrigin(origins = "http://localhost:4200")
        public class DemoController {

        @RequestMapping(value = "/api", method = RequestMethod.GET)
        public Map<String,Object> home() {
        Map<String,Object> model = new HashMap<String,Object>();
        model.put("id", UUID.randomUUID().toString());
        model.put("content", "Hello World");
        return model;
        }
        }





        share|improve this answer















        You have error in your RequestMapping, as you have used @RequestMapping("/api/"), this will be evaluated as http://your_url/api//. Such mapping is not present in your controller, hence it is giving you CORS Origin error.



        Just remove trailing / from @RequestMapping("/api/") so that it will be @RequestMapping("/api").



        Your class should look like follows,



        @RestController
        @CrossOrigin(origins = "http://localhost:4200")
        public class DemoController {

        @RequestMapping(value = "/api", method = RequestMethod.GET)
        public Map<String,Object> home() {
        Map<String,Object> model = new HashMap<String,Object>();
        model.put("id", UUID.randomUUID().toString());
        model.put("content", "Hello World");
        return model;
        }
        }






        share|improve this answer














        share|improve this answer



        share|improve this answer








        edited Apr 3 '18 at 4:22

























        answered Apr 3 '18 at 4:17









        Paresh LomateParesh Lomate

        319317




        319317













        • Thank you it helped!! Thanks everyone for your help

          – Maciej Czarnota
          Apr 3 '18 at 19:41



















        • Thank you it helped!! Thanks everyone for your help

          – Maciej Czarnota
          Apr 3 '18 at 19:41

















        Thank you it helped!! Thanks everyone for your help

        – Maciej Czarnota
        Apr 3 '18 at 19:41





        Thank you it helped!! Thanks everyone for your help

        – Maciej Czarnota
        Apr 3 '18 at 19:41













        1














        This is the problem with your server-side. all you will have to do is do a component in your server-side and it will solve the issue. or refer here



        follow this code:



        @Component
        @Order(Ordered.HIGHEST_PRECEDENCE)
        public class RequestFilter implements Filter {

        public void doFilter(ServletRequest req, ServletResponse res, FilterChain chain) {
        HttpServletResponse response = (HttpServletResponse) res;
        HttpServletRequest request = (HttpServletRequest) req;

        response.setHeader("Access-Control-Allow-Origin", "http://localhost:4200");
        response.setHeader("Access-Control-Allow-Methods", "POST, PUT, GET, OPTIONS, DELETE");
        response.setHeader("Access-Control-Allow-Headers", "x-requested-with");
        response.setHeader("Access-Control-Max-Age", "3600");
        response.setHeader("Access-Control-Allow-Credentials", "true");

        if (!(request.getMethod().equalsIgnoreCase("OPTIONS"))) {
        try {
        chain.doFilter(req, res);
        } catch(Exception e) {
        e.printStackTrace();
        }
        } else {
        System.out.println("Pre-flight");
        response.setHeader("Access-Control-Allow-Methods", "POST,GET,DELETE");
        response.setHeader("Access-Control-Max-Age", "3600");
        response.setHeader("Access-Control-Allow-Headers", "authorization, content-type," +
        "access-control-request-headers,access-control-request-method,accept,origin,authorization,x-requested-with");
        response.setStatus(HttpServletResponse.SC_OK);
        }

        }
        }





        share|improve this answer




























          1














          This is the problem with your server-side. all you will have to do is do a component in your server-side and it will solve the issue. or refer here



          follow this code:



          @Component
          @Order(Ordered.HIGHEST_PRECEDENCE)
          public class RequestFilter implements Filter {

          public void doFilter(ServletRequest req, ServletResponse res, FilterChain chain) {
          HttpServletResponse response = (HttpServletResponse) res;
          HttpServletRequest request = (HttpServletRequest) req;

          response.setHeader("Access-Control-Allow-Origin", "http://localhost:4200");
          response.setHeader("Access-Control-Allow-Methods", "POST, PUT, GET, OPTIONS, DELETE");
          response.setHeader("Access-Control-Allow-Headers", "x-requested-with");
          response.setHeader("Access-Control-Max-Age", "3600");
          response.setHeader("Access-Control-Allow-Credentials", "true");

          if (!(request.getMethod().equalsIgnoreCase("OPTIONS"))) {
          try {
          chain.doFilter(req, res);
          } catch(Exception e) {
          e.printStackTrace();
          }
          } else {
          System.out.println("Pre-flight");
          response.setHeader("Access-Control-Allow-Methods", "POST,GET,DELETE");
          response.setHeader("Access-Control-Max-Age", "3600");
          response.setHeader("Access-Control-Allow-Headers", "authorization, content-type," +
          "access-control-request-headers,access-control-request-method,accept,origin,authorization,x-requested-with");
          response.setStatus(HttpServletResponse.SC_OK);
          }

          }
          }





          share|improve this answer


























            1












            1








            1







            This is the problem with your server-side. all you will have to do is do a component in your server-side and it will solve the issue. or refer here



            follow this code:



            @Component
            @Order(Ordered.HIGHEST_PRECEDENCE)
            public class RequestFilter implements Filter {

            public void doFilter(ServletRequest req, ServletResponse res, FilterChain chain) {
            HttpServletResponse response = (HttpServletResponse) res;
            HttpServletRequest request = (HttpServletRequest) req;

            response.setHeader("Access-Control-Allow-Origin", "http://localhost:4200");
            response.setHeader("Access-Control-Allow-Methods", "POST, PUT, GET, OPTIONS, DELETE");
            response.setHeader("Access-Control-Allow-Headers", "x-requested-with");
            response.setHeader("Access-Control-Max-Age", "3600");
            response.setHeader("Access-Control-Allow-Credentials", "true");

            if (!(request.getMethod().equalsIgnoreCase("OPTIONS"))) {
            try {
            chain.doFilter(req, res);
            } catch(Exception e) {
            e.printStackTrace();
            }
            } else {
            System.out.println("Pre-flight");
            response.setHeader("Access-Control-Allow-Methods", "POST,GET,DELETE");
            response.setHeader("Access-Control-Max-Age", "3600");
            response.setHeader("Access-Control-Allow-Headers", "authorization, content-type," +
            "access-control-request-headers,access-control-request-method,accept,origin,authorization,x-requested-with");
            response.setStatus(HttpServletResponse.SC_OK);
            }

            }
            }





            share|improve this answer













            This is the problem with your server-side. all you will have to do is do a component in your server-side and it will solve the issue. or refer here



            follow this code:



            @Component
            @Order(Ordered.HIGHEST_PRECEDENCE)
            public class RequestFilter implements Filter {

            public void doFilter(ServletRequest req, ServletResponse res, FilterChain chain) {
            HttpServletResponse response = (HttpServletResponse) res;
            HttpServletRequest request = (HttpServletRequest) req;

            response.setHeader("Access-Control-Allow-Origin", "http://localhost:4200");
            response.setHeader("Access-Control-Allow-Methods", "POST, PUT, GET, OPTIONS, DELETE");
            response.setHeader("Access-Control-Allow-Headers", "x-requested-with");
            response.setHeader("Access-Control-Max-Age", "3600");
            response.setHeader("Access-Control-Allow-Credentials", "true");

            if (!(request.getMethod().equalsIgnoreCase("OPTIONS"))) {
            try {
            chain.doFilter(req, res);
            } catch(Exception e) {
            e.printStackTrace();
            }
            } else {
            System.out.println("Pre-flight");
            response.setHeader("Access-Control-Allow-Methods", "POST,GET,DELETE");
            response.setHeader("Access-Control-Max-Age", "3600");
            response.setHeader("Access-Control-Allow-Headers", "authorization, content-type," +
            "access-control-request-headers,access-control-request-method,accept,origin,authorization,x-requested-with");
            response.setStatus(HttpServletResponse.SC_OK);
            }

            }
            }






            share|improve this answer












            share|improve this answer



            share|improve this answer










            answered Apr 3 '18 at 5:06









            Abhishek EkaanthAbhishek Ekaanth

            1,1851023




            1,1851023























                0














                As you've chosen to annotate your app, you must provide the @CrossOrigin annotation for each method individually. That means you must also do:



                @CrossOrigin(origins = "http://localhost:4200/", maxAge = 3600)
                @RequestMapping("/login/")
                public Map<String,Object> login() {
                /* ... */
                }


                Reference: https://spring.io/guides/gs/rest-service-cors/#_enabling_cors






                share|improve this answer




























                  0














                  As you've chosen to annotate your app, you must provide the @CrossOrigin annotation for each method individually. That means you must also do:



                  @CrossOrigin(origins = "http://localhost:4200/", maxAge = 3600)
                  @RequestMapping("/login/")
                  public Map<String,Object> login() {
                  /* ... */
                  }


                  Reference: https://spring.io/guides/gs/rest-service-cors/#_enabling_cors






                  share|improve this answer


























                    0












                    0








                    0







                    As you've chosen to annotate your app, you must provide the @CrossOrigin annotation for each method individually. That means you must also do:



                    @CrossOrigin(origins = "http://localhost:4200/", maxAge = 3600)
                    @RequestMapping("/login/")
                    public Map<String,Object> login() {
                    /* ... */
                    }


                    Reference: https://spring.io/guides/gs/rest-service-cors/#_enabling_cors






                    share|improve this answer













                    As you've chosen to annotate your app, you must provide the @CrossOrigin annotation for each method individually. That means you must also do:



                    @CrossOrigin(origins = "http://localhost:4200/", maxAge = 3600)
                    @RequestMapping("/login/")
                    public Map<String,Object> login() {
                    /* ... */
                    }


                    Reference: https://spring.io/guides/gs/rest-service-cors/#_enabling_cors







                    share|improve this answer












                    share|improve this answer



                    share|improve this answer










                    answered Apr 3 '18 at 4:05









                    Randy CasburnRandy Casburn

                    4,9641318




                    4,9641318























                        0














                        Instead of annotating every method with @Crossorigin you can use a filter in web.xml as mentioned below



                        Add Below filter to web.xml file.



                         <filter>
                        <filter-name>cors</filter-name>
                        <filter-class>com.thetransactioncompany.cors.CORSFilter</filter-class>
                        </filter>

                        <filter-mapping>
                        <filter-name>cors</filter-name>
                        <url-pattern>/*</url-pattern>
                        </filter-mapping>


                        Dependency for the mentioned jar is given below.



                        <dependency>
                        <groupId>com.thetransactioncompany</groupId>
                        <artifactId>cors-filter</artifactId>
                        <version>2.5</version>
                        </dependency>


                        Thats it -Done.






                        share|improve this answer




























                          0














                          Instead of annotating every method with @Crossorigin you can use a filter in web.xml as mentioned below



                          Add Below filter to web.xml file.



                           <filter>
                          <filter-name>cors</filter-name>
                          <filter-class>com.thetransactioncompany.cors.CORSFilter</filter-class>
                          </filter>

                          <filter-mapping>
                          <filter-name>cors</filter-name>
                          <url-pattern>/*</url-pattern>
                          </filter-mapping>


                          Dependency for the mentioned jar is given below.



                          <dependency>
                          <groupId>com.thetransactioncompany</groupId>
                          <artifactId>cors-filter</artifactId>
                          <version>2.5</version>
                          </dependency>


                          Thats it -Done.






                          share|improve this answer


























                            0












                            0








                            0







                            Instead of annotating every method with @Crossorigin you can use a filter in web.xml as mentioned below



                            Add Below filter to web.xml file.



                             <filter>
                            <filter-name>cors</filter-name>
                            <filter-class>com.thetransactioncompany.cors.CORSFilter</filter-class>
                            </filter>

                            <filter-mapping>
                            <filter-name>cors</filter-name>
                            <url-pattern>/*</url-pattern>
                            </filter-mapping>


                            Dependency for the mentioned jar is given below.



                            <dependency>
                            <groupId>com.thetransactioncompany</groupId>
                            <artifactId>cors-filter</artifactId>
                            <version>2.5</version>
                            </dependency>


                            Thats it -Done.






                            share|improve this answer













                            Instead of annotating every method with @Crossorigin you can use a filter in web.xml as mentioned below



                            Add Below filter to web.xml file.



                             <filter>
                            <filter-name>cors</filter-name>
                            <filter-class>com.thetransactioncompany.cors.CORSFilter</filter-class>
                            </filter>

                            <filter-mapping>
                            <filter-name>cors</filter-name>
                            <url-pattern>/*</url-pattern>
                            </filter-mapping>


                            Dependency for the mentioned jar is given below.



                            <dependency>
                            <groupId>com.thetransactioncompany</groupId>
                            <artifactId>cors-filter</artifactId>
                            <version>2.5</version>
                            </dependency>


                            Thats it -Done.







                            share|improve this answer












                            share|improve this answer



                            share|improve this answer










                            answered Apr 3 '18 at 4:57









                            vipin cpvipin cp

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