EduBw's questions

I have some web-rest services in Spring and they accept a body. If a malicious user creates an incorrect body:

{
 \"usuario": "blabla"
}

Spring handles the exception automatically by returning the error:

 "code": "UNKNOWN_ERROR",
   "message": "JSON parse error: Unexpected character ('\\' (code 92)): was expecting double-quote to start field name; nested exception is com.fasterxml.jackson.core.JsonParseException: Unexpected character ('\\' (code 92)): was expecting double-quote to start field name\n at [Source: java.io.PushbackInputStream@3fb5605c; line: 2, column: 4]",
   "type": "T",
   "component": "UNKNOWN_COMPONENT",
   "application": "Mweb",
   "timeStamp": "2022-02-18T13:15:39.224Z",
   "errors": [{"code": "UNKNOWN_ERROR"}],
   "stackTrace":    [
            {
         "methodName": "readJavaType",
         "fileName": "AbstractJackson2HttpMessageConverter.java",
         "lineNumber": 240
      },
            {
         "methodName": "read",
         "fileName": "AbstractJackson2HttpMessageConverter.java",
         "lineNumber": 225
      },
            {
         "methodName": "readWithMessageConverters",
         "fileName": "AbstractMessageConverterMethodArgumentResolver.java",
         "lineNumber": 201
      },
            {
         "methodName": "readWithMessageConverters",
         "fileName": "RequestResponseBodyMethodProcessor.java",
         "lineNumber": 150
      },
            {
         "methodName": "resolveArgument",
         "fileName": "RequestResponseBodyMethodProcessor.java",
         "lineNumber": 128
      }
   ]
}

Since the app fails before it reaches my controller, when it tries to create the input object, I need to return a "custom" message first.

I have read and tried to use:

@RestControllerAdvice
public class GlobalExceptionHandler {

/**
 * Se captura el tipo de error.
 * @param e objeto capturado
 * @return salida del metodo.
 */
@ExceptionHandler(HttpMessageNotReadableException.class)
public ResponseEntity<myException> handleException(Exception e){
return crearException(e,Constantes.INTERNAL_SERVER_CODE, Constantes.EXCEPTION_HANDLER_JSON);
 }

/**
 * Metodo auxiliar para crear el objeto del error
 * @param e objeto capturado
 * @return objeto del error.
 */
private ResponseEntity<myException> crearException()......

The problem is that it doesn't fit inside the method.

I have chosen the HttpMessageNotReadableException because in the Java console it is the first cause by that appears as an error.

I am using PL/SQL to query and do logic on the database.

For this build I need to get the oldest date from the table.

If I do a select to the table I get: (for example) Without PL/SQL from the sqlWindows option

21/10/2012 10:10:20 

That is, it outputs dd/MM/yyyy hh:mm:ss

Later when I do my PL/SQL code to perform the operations:

     fecha VARCHAR2(100) := null;
     -- fecha DATE := null
     -- INTENTADO DE LAS 2 MANERAS.

     BEGIN
      SELECT FEC_ALTA
      INTO fecha
      FROM articulo
      WHERE cod_art = '1a';
          
          ...
      EXCEPTION

The thing is, it doesn't matter if you use the into date as a varchar2 or as a date, because it loses the hh:mm:ss. In debugging time when inspecting the variable it doesn't have the hh:mm:ss and when the result is returned to JAVA it doesn't have hh:mm:ss either...

It is Oracle and the IDE PL/SQL DEVELOPER 11.0.6 is being used Thank you.

I have created an authentication system in Springboot, which checks the user, if it exists, I create a jwt token that is sent to the front and the front returns it to make requests, this token has the role incorporated.

private static final String AUTHORITIES_KEY = "auth";

static void addAuthentication(HttpServletResponse res, Authentication authentication) {

   String token = Jwts.builder()
    .setSubject(authentication.getName())

    .setExpiration(new Date(System.currentTimeMillis() + timeout))

    .signWith(SignatureAlgorithm.HS512, key)
    .claim(AUTHORITIES_KEY, authentication.getAuthorities()) // El rol es "ROLE_Consulta"
    .compact();
    res.addHeader("Authorization", "Bearer " + token);

}

For the user I'm using, his role is query, so I add in the controller:

@Secured("ROLE_Consulta")

So when I send the token from the front, I try to decompose it to create the user to access the system:

**EDITO:**

static Authentication getAuthentication(HttpServletRequest request) {
        // Obtenemos el token que viene en el encabezado de la peticion
    String token = request.getHeader("Authorization");

    // si hay un token presente, entonces lo validamos
    if (token != null) {
        String user = Jwts.parser()
                .setSigningKey(key)
                .parseClaimsJws(token.replace("Bearer", "")) // este metodo es el que valida
                .getBody().getSubject();

             Claims claims = Jwts.parser()
                        .setSigningKey(key)
                        .parseClaimsJws(token.replace("Bearer", "")) 
                        .getBody();

             Collection authorities  = Arrays.stream(claims.get(AUTHORITIES_KEY).toString().split(","))
                            .map(SimpleGrantedAuthority::new)
                            .collect(Collectors.toList());

        return user != null ? new UsernamePasswordAuthenticationToken(user, null, authorities) : null;
    }
    return null;
}

}

As you can see in the image, I have the ROLE_Query role, but I get the AccessDeniedException error.

"status": 403,
"error": "Forbidden",
"exception": "org.springframework.security.access.AccessDeniedException",
"message": "Acceso denegado",

I am getting an error when I try to create the authentication of a user, I have been able to discover that the error occurs because that user is not loaded in memory and this is a problem, since the users must leave the database, but I will not to dump all users in memory....

I took the tutorial from here: https://windoctor7.github.io/spring-jwt.html

The code is the following:

@Configuration
@EnableWebSecurity
@ComponentScan(basePackages = "es.....service")
public class ServiciosConfig extends WebSecurityConfigurerAdapter {

    @Bean
    public LoginFilter createLogin() throws Exception {
        return new LoginFilter("/login", authenticationManager());
    }

    @Override
    protected void configure(HttpSecurity http) throws Exception {
        http.csrf().disable().authorizeRequests()
            .antMatchers("/login").permitAll() //permitimos el acceso a /login a cualquiera
            .anyRequest().authenticated() //cualquier otra peticion requiere autenticacion
            .and()
            // Las peticiones /login pasaran previamente por este filtro
           .addFilterBefore(createLogin(),  UsernamePasswordAuthenticationFilter.class)
            // Las demás peticiones pasarán por este filtro para validar el token
            .addFilterBefore(new JwtFilter(),
                    UsernamePasswordAuthenticationFilter.class);
    }

    @Bean
    CorsConfigurationSource corsConfigurationSource() {
        UrlBasedCorsConfigurationSource source = new UrlBasedCorsConfigurationSource();
        source.registerCorsConfiguration("/**", new CorsConfiguration().applyPermitDefaultValues());
        return source;
    }

    @Override
    protected void configure(AuthenticationManagerBuilder auth) throws Exception {
        // Creamos una cuenta de usuario por default
        auth.inMemoryAuthentication()
                .withUser("edu")
                .password("123")
                .roles("ADMIN");
    }

Here 3 things are done:

The requests are captured and if it is login, the user is verified in the DB, if it is correct, the token is created. (This is the problem)

If it is not login, check the token. (This works)

Save users in memory (This is the problem)

public class LoginFilter extends AbstractAuthenticationProcessingFilter {

    private static final Logger LOGGER = LoggerFactory.getLogger(LoginFilter.class);

    @Autowired
    private RolesUserRepository rolRepository;

    public LoginFilter(String url, AuthenticationManager authManager) {
        super(new AntPathRequestMatcher(url));
        setAuthenticationManager(authManager);
    }

    @Override
    public Authentication attemptAuthentication(HttpServletRequest req, HttpServletResponse res)
            throws AuthenticationException, IOException, ServletException {

        // obtenemos el body de la peticion que asumimos viene en formato JSON
        InputStream body = req.getInputStream();

        // Realizamos un mapeo a nuestra clase User para tener ahi los datos
        User user = new ObjectMapper().readValue(body, User.class);

        // Finalmente autenticamos
        LOGGER.info("Buscando al usuario: " + user.getUser() + " en la BD.");
        RolesUser rol = this.rolRepository.findByUser(user.getUser());

        if (rol.getRol() != null) {
            LOGGER.info("El usuario: " + user.getUser() + " es correcto.");

            List<GrantedAuthority> grantedAuths = AuthorityUtils.commaSeparatedStringToAuthorityList(rol.getRol());
            return getAuthenticationManager().authenticate(new UsernamePasswordAuthenticationToken(user.getUser(),
                    user.getPwd(), grantedAuths));
        } else {
            throw new AuthenticationException("Credenciales inválidas.") {
            };
        }

    }

    @Override
    protected void successfulAuthentication(HttpServletRequest req, HttpServletResponse res, FilterChain chain,
            Authentication auth) throws IOException, ServletException {
        // Si la autenticacion fue exitosa, agregamos el token a la respuesta
        JwtUtil.addAuthentication(res, auth.getName());
    }
}

class User {
    private String user;
    private String pwd;

    public User() {}

    public User(String user, String pwd) {
        this.user = user;
        this.pwd = pwd;
    }
    public String getUser() {
        return user;
    }
    public void setUser(String user) {
        this.user = user;
    }
    public String getPwd() {
        return pwd;
    }
    public void setPwd(String pwd) {
        this.pwd = pwd;
    }
}

As you can see, to authenticate the user I look for it in the database, if it is correct I do a

return getAuthenticationManager().authenticate(new UsernamePasswordAuthenticationToken(user.getUser(), user.getPwd(), grantedAuths));

And now the problem: If the user exists in the DB but is not in the @Override

protected void configure(AuthenticationManagerBuilder auth) throws Exception {
    // Creamos una cuenta de usuario por default
    auth.inMemoryAuthentication()
            .withUser("edu")
            .password("123")
            .roles("ADMIN");
}

It pops on the return getAuthenticationManager line....I get an error from the org.springframework.security.authentication.BadCredentialsException class AbstractAuthenticationProcessingFilter: Bad credentials

But if it's in that line, it works perfectly, the problem is that I can't have the users loaded in memory, so I need to be able to "remove the from the code auth.inMemoryAuthentication()and make it work, I "think" that maybe it must be because of the class used AbstractAuthenticationProcessingFilter but it is the one that I always find on the web pages. Thanks!

-------------------------------------------------

After some modifications the code stays like this: But it keeps crashing:

In the WebSecurityConfigurerAdapter

@Configuration
@EnableWebSecurity
@ComponentScan(basePackages = "es....service")
public class ServiciosConfig extends WebSecurityConfigurerAdapter {

    @Autowired
    private UserServiceImpl userDetailService;

    @Bean
    public LoginFilter createLogin() throws Exception {
        return new LoginFilter("/login", authenticationManager());
    }


    @Override
    protected void configure(HttpSecurity http) throws Exception {
        http.csrf().disable().authorizeRequests().antMatchers("/login").permitAll() // permitimos el acceso a /login a
                                                                                    // cualquiera
                .anyRequest().authenticated() // cualquier otra peticion requiere autenticacion
                .and()
                // Las peticiones /login pasaran previamente por este filtro
                .addFilterBefore(createLogin(), UsernamePasswordAuthenticationFilter.class)
                // Las demás peticiones pasarán por este filtro para validar el token
                .addFilterBefore(new JwtFilter(), UsernamePasswordAuthenticationFilter.class);
    }

    @Bean
    CorsConfigurationSource corsConfigurationSource() {
        UrlBasedCorsConfigurationSource source = new UrlBasedCorsConfigurationSource();
        source.registerCorsConfiguration("/**", new CorsConfiguration().applyPermitDefaultValues());
        return source;
    }

    @Bean
    public PasswordEncoder passwordEncoder() {
         return new StandardPasswordEncoder();
    }

    @Bean
    @Override
    public AuthenticationManager authenticationManagerBean() throws Exception {
        return super.authenticationManagerBean();
    }

    @Override
    protected void configure(AuthenticationManagerBuilder auth) throws Exception {
        auth
        .userDetailsService(userDetailService).passwordEncoder(passwordEncoder());
    }

In the WebSecurityConfigurerAdapter, I make a "PassEncoder" and remove the cache which is what I don't want to have, because I want to get the users out of the database, so instead I create a new implementation:

@Service
public class UserServiceImpl implements UserDetailsService {
    private static final Logger LOGGER = LoggerFactory.getLogger(UserServiceImpl.class);
    @Autowired 
    private RolesUserRepository repository;

    public void UserService(RolesUserRepository repository) {
            this.repository = repository;
        }

    @Override
    public UserDetails loadUserByUsername(String userName) throws UsernameNotFoundException {
        RolesUser rolUser = repository.findByUser(userName);
        if(rolUser.getRol() != null) {
          LOGGER.info("El usuario: " + userName + " es: " + rolUser.getRol());
          List<GrantedAuthority> grantedAuths = AuthorityUtils.commaSeparatedStringToAuthorityList(rolUser.getRol());
          return new MyUserPrincipal(grantedAuths,"$2a$10$slYQmyNdGzTn7ZLBXBChFOC9f6kFjAqPhccnP6DxlWXx2lPk1C3G6",userName);
        }else {
            throw new AuthenticationException("Las credenciales son incorrectas.") {
            };
        }
    }

This is the new implementation, it checks if that user exists in the database (its password does not matter) and if it has a role, it exists and I create the userDetail class so that it can be validated.

public class MyUserPrincipal implements UserDetails {

/**
 * 
 */
private static final long serialVersionUID = 1L;

private List<GrantedAuthority> grantedAuths;
private String password;
private String userName;

public MyUserPrincipal(List<GrantedAuthority> grantedAuths, String password, String userName) {
    this.grantedAuths = grantedAuths;
    this.password = password;
    this.userName = userName;
}

@Override
public Collection<? extends GrantedAuthority> getAuthorities() {
    return this.grantedAuths;
}

@Override
public String getPassword() {
    return this.password;
}

@Override
public String getUsername() {
    return this.userName;
}

@Override
public boolean isAccountNonExpired() {
    // TODO Auto-generated method stub
    return true;
}

@Override
public boolean isAccountNonLocked() {
    // TODO Auto-generated method stub
    return true;
}

@Override
public boolean isCredentialsNonExpired() {
    // TODO Auto-generated method stub
    return true;
}

@Override
public boolean isEnabled() {
    // TODO Auto-generated method stub
    return true;
}

}

Here I had to change the returns to true because they were giving me different errors.

Finally, in the class where it once had the check, it now remains empty: public class LoginFilter extends AbstractAuthenticationProcessingFilter {

    public LoginFilter(String url, AuthenticationManager authManager) {
        super(new AntPathRequestMatcher(url));
        setAuthenticationManager(authManager);
    }

    @Override
    public Authentication attemptAuthentication(HttpServletRequest req, HttpServletResponse res)
            throws AuthenticationException, IOException, ServletException {

        // obtenemos el body de la peticion que asumimos viene en formato JSON
        InputStream body = req.getInputStream();

        // Realizamos un mapeo a nuestra clase User para tener ahi los datos
        User user = new ObjectMapper().readValue(body, User.class);

        return getAuthenticationManager().authenticate(
                    new UsernamePasswordAuthenticationToken(
                            user.getUser(),
                            user.getPwd(),
                            Collections.emptyList()
                    )
            );

    }

    @Override
    protected void successfulAuthentication(HttpServletRequest req, HttpServletResponse res, FilterChain chain,
            Authentication auth) throws IOException, ServletException {
        // Si la autenticacion fue exitosa, agregamos el token a la respuesta
        JwtUtil.addAuthentication(res, auth.getName());
    }
}

class User {
    private String user;
    private String pwd;

    public User() {
    }

    public User(String user, String pwd) {
        this.user = user;
        this.pwd = pwd;
    }

    public String getUser() {
        return user;
    }

    public void setUser(String user) {
        this.user = user;
    }

    public String getPwd() {
        return pwd;
    }

    public void setPwd(String pwd) {
        this.pwd = pwd;
    }

}

I have been guided for this part of: https://www.javainuse.com/spring/boot-jwt-mysql

The error I get is the same as before "BAD CREDENTIALS" in the class

AbstractUserDetailsAuthenticationProvider, Línea 171.
        catch (AuthenticationException exception) {
            if (cacheWasUsed) {
                // There was a problem, so try again after checking
                // we're using latest data (i.e. not from the cache)
                cacheWasUsed = false;
                user = retrieveUser(username,
                        (UsernamePasswordAuthenticationToken) authentication);
                preAuthenticationChecks.check(user);
                additionalAuthenticationChecks(user,
                        (UsernamePasswordAuthenticationToken) authentication);
            }

In debugging, the authentication variable has the following:

org.springframework.security.authentication.UsernamePasswordAuthenticationToken@ffce9fa1: Principal: jose; Credentials: [PROTECTED]; Authenticated: true; Details: null; Not granted any authorities

I have an array of objects that come from the database, I have to keep the object whose date is the highest, that is, the last one that was inserted.

2018-10-09 10:11:50
2018-11-01 13:11:22
2018-11-01 14:20:10 --> esta

private ThirdValidation maxRegister(List<ThirdValidation> process) {
    ThirdValidation tv = null, maxTv = null;
    String strDateFormat = "aaaa-MM-dd hh:mm:ss"; // Formato de la fecha  
    SimpleDateFormat sdf = new SimpleDateFormat(strDateFormat);
    try {
        // se comprueba el obj con la fecha más alta.
        for (int i = 0; i < process.size(); i++) {
            tv = process.get(i);
            if(maxTv == null) {
                maxTv = tv;
            } else {
                Date max = sdf.parse(maxTv.getRegistroModif());
                Date current = sdf.parse(tv.getRegistroModif());
                // El max es menor que el actual
                if(max.compareTo(current) == 0) {
                    maxTv = tv;
                }
            }
        }
    } catch (Exception e) {
        LOGGER.warn("******************");
        LOGGER.warn("ERROR maxRegister()");
        e.printStackTrace();
        LOGGER.warn("******************");
    }
    return maxTv;
}

It gives an error when it tries to do: maxTv.getRegistroModif(), I have verified that it has data and they are 2018-10-09 10:11:50, the error is: java.text.ParseException: Unparseable date but previously I already specified the format: String strDateFormat = "aaaa-MM-dd hh:mm:ss";// Date format . Thank you!

I want to form a kind of progress bar that gradually degrades the main color.

Starting from red, to a very light red and finally white.

such a thing

Imagine that the yellow is a light red (I don't know how to do it with paint.)

The case I have in my html:

.rojo{
  width:600px;
  height: 200px;
  background-color:#F54021;
  background:linear-gradient(left, #F54021, 60%, #D95030, 30%, white , 10%);
}

<div class="rojo">
</div>

The problem when executing that the entire bar is red, it does not do any gradient and I have also noticed that it only takes this line

background-color:#F54021;

If I put black or blue or whatever it will be the final color of the bar...

Edit : The gradient goes from the left to the right.

Thank you

I am with Angular 6 , I receive from the server a JSON whose date is: "loadDate": "2017-02-12T00:00:00+01:00",

When displaying this date in the html I have:

<td class="left">{{ scenario.loadDate | date:'shortDate':'':'es' }}</td>

This pipe returns the date 12/2/17.

When I modify other data of the object and send this object again, what is being sent is the date with a lot of rubbish:

"2017-02-12T00:00:00+01:00"

What I want is to send is 12/2/17that it is shown in it HTMLor give it my own format 2017-02-12, I had thought of cutting the string that I receive in the Tand keeping the part on the left, the problem is that it is not unknown how the date will come .

I am generating a cookie that expires in 9 minutes, but when I want to observe it, it is 2 hours less than the creation time.

The cookie has been created at 09:10:00 am and in the expires of the image it says 07:17....

The code is:

                if($cookies.get('uuid') != undefined ) {
                    $cookies.remove('uuid');
                }
                var dt = new Date().getTime();
                var uuid = 'xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx'.replace(/[xy]/g, function(c) {
                    var r = (dt + Math.random()*16)%16 | 0;
                    dt = Math.floor(dt/16);
                    return (c=='x' ? r :(r&0x3|0x8)).toString(16);
                });

                var expiresValue = new Date(today);
                expiresValue.setMinutes(today.getMinutes() + 9);
                $cookies.put("uuid",uuid, {'expires': expiresValue});

I need the cookie to expire in 9 minutes from its creation, thank you very much!

I want to make the Windows calculator open when a user clicks a <a>or a :<button>

<button onclick="window.open('file:\\\C:\Windows\System32\calc.exe')">
  abrir calculadora
</button>

<a href = "C:\Windows\System32\calc.exe"> ir </a>

What I get is that the calculator is downloaded and if I click on it it runs, but what I want is for it to run directly.

The idea is to know what it would look like in the HTML to launch it later in Angular. I mention it in case Angular can manage it better, although I have looked at information and I don't see how to launch it from Angular.

I'm trying to convert a date from a BJSON to a java timestamp or at least something readable and reliable and I already tweak it with java... the thing is that I have this date in BJSON from mongoDB

ISODate("2019-05-21T07:16:00.599Z")

Obtaining this result in Java returns me:

Tue May 21 09:16:00 CEST 2019

Now I'm going to change it to get the day month and year...

 DateTimeFormatter dtf = DateTimeFormatter.ofPattern("EEE MMM d HH:mm:ss zzz uuuu", Locale.US);
 ZonedDateTime zdt = ZonedDateTime.parse(updateDate, dtf);

I am getting:

2019-05-21T09:16+02:00[Europe/Paris]

It seems that according to java it is returning me the 09 hours, and 16 minutes and 02 seconds as the final result. However when he returned it to me Tue May 21 09:16:00 CEST 2019, the seconds were 00.

What am I doing wrong ?

I am doing a crud with SpringBoot and mongoDb in my local, I have added a record from the mongo console ->

db.articulo.save({"_id":ObjectId("90e"),"idPromocion":1,"numArticulos":"3","articulos":[{"nombre":"silla","color":"rojo","precio":"10€"},{"nombre":"mesa","color":"azul","precio":"2€"}],"entrega":"sabado"}

And now to make the crud I have created the model

@Document
public class Articulo {

    private Integer idPromocion; 
    private Articulos art; 

    public Articulo(){}

    public Articulo(Integer idPromocion,Articulos art){
        this.idPromocion=idPromocion;
        this.art=art;
    }
    getters.setter...
 }


 public class Articulos {
  private String nombre; 
  private String color; 
  private String precio; 

  constructor, getter, setters
 }
 ---------------

the repository

    @Repository
    public interface ArticuloRepository extends CrudRepository<Articulo, String> 
 { }

Implementation

@Autowired
private ArticuloRepository repositorio;

     List<Articulo> list= (List<Articulo>) repositorio.findAll();

Later in the execution I have checked the data of the list and I find the data to null, apparently it does not recover them correctly. I have another collection with a simpler structure and it does retrieve them for me.

I want to replace all the characters of the input type text, I have seen on the internet that /g is used, but when I put it, I get an error that it is not "defined"

  function replaceAllInvalidCharacter(id){
        var characters = ["/","\\", "¿","?","#","<",">","[","]","{","}","%","="];
    var val = document.getElementById(id).value;

    for(var i = 0 ; i < characters.length; i++){
        if (val.indexOf(characters[i]) != -1) {
            val = val.replace(characters[i]/g, '');
        } 
    }
    document.getElementById(id).value = val;
 }

bug ->

Uncaught ReferenceError: g is not defined

How do I make it take all the characters?

For example: e/d/um/o/l/ay stay with edu cool...

I have a web page that brings an Iframe that contains a form with its submit button, what I am looking for is to make a javascript code (jquery is not valid) that when the button inside the Iframe is pressed, I can perform a JS function.

I'm in charge of the code, but I need to know how my javascript or my web page, browser... detects that the button inside an Iframe has been pressed.

PS: I don't create the Iframe or that button, otherwise I would put an onclick or something like that, but no.

All the best.

I have a front with several options, these options can take you to a web page of cars, motorcycles, etc...

In the backEnd, said request is collected by post, some operations are carried out in said method and it calls "itself" again but by get to make the redirection2.

Here is the code that will receive the sensitive data and where it goes:

@RequestMapping(method = RequestMethod.POST, value = "/redirigir")
    public ModelAndView redirigir (@RequestBody Redireccion destino, ModelMap model) throws JsonProcessingException {

        log.info( "--->  SERVICIO DE REDIRECCIÓN");

        printParameters(destino);
        String direccion = "";

        if ("generar".equals(destino.getDestino())) {
            direccion = urlGenerar;
        }

        if ("descarga".equals(destino.getDestino())) {
            direccion = urlDescarga;
        }

        if ("".equals(direccion)) {
            log.error( "--->  El destino no es correcto");

//          return new ResponseEntity<String>("", HttpStatus.NOT_FOUND);
        } else {
            log.info( "--->  Redirigiendo.");


//          return new ResponseEntity<String>(direccion.concat(destino.getUsuario()), HttpStatus.OK);   
        }
        model.addAttribute("destino", destino);
        return new ModelAndView("redirect:/gestUsr/redirigir2");
    }

And here is the code that is called by the above code TO TAKE TO GOOGLE (when it works it will take where it needs to take.)

    @RequestMapping(method = RequestMethod.GET, value = "/redirigir2")
    public ModelAndView redirigir2 (ModelMap model) throws JsonProcessingException {

        log.info( "--->  SERVICIO DE REDIRECCIÓN2");
        log.info (model.get("destino"));
        return new ModelAndView("redirect:http://www.google.es");
//          return new ResponseEntity<String>(direccion.concat(destino.getUsuario()), HttpStatus.OK);   
    }

It was done in this way, (service1-POST) calls (service2-Get) because when the redirection was attempted, the 405 OPTIONS jumped because it was a POST type, therefore, the redirection2 is made from a service that is by GET but it keeps giving problems.

edit:

I have set the method so that redirect2 is by RequestMethod.PUT and it doesn't work either.

I have changed the url for an Internal url of the project (it should manage Angular7)

return new ModelAndView("redirect:http://localhost:8080/****/pin");

The result is:

It gives a nice 200 and everything you want, but it doesn't do the redirection, if I put the url of h ttp://localhost:8080/****/pinobviously it takes me.

I have a series of points that I want to place in the center of the screen.

The number of points is random, sometimes they will come more or less.

The problem is that I want it to snap to the center, but what I am getting is that it starts from the center.

The code is:

  .carousel--Multi-4 {
    position: relative;
  }
  .carousel--Multi-4 .slick-dots {
    position: absolute;
    bottom: -10px;
    left: calc(50%);
    list-style-type: none;
    list-style-position: outside;
  }
  .carousel--Multi-4 .slick-dots li {
    float: left;
    height: 8px;
    width: 8px;
    margin: 0 6px;
    border-radius: 4px;
    background-color: #dedede;
    text-indent: -9999px;
    cursor: pointer;
  }
  .carousel--Multi-4 .slick-dots .slick-active {
    background-color: #ec0000;
  }

These "points" are automatically generated with the slick library http://kenwheeler.github.io/slick/

Thanks.

From CDN ->

 <link rel="stylesheet" type="text/css" href="//cdn.jsdelivr.net/npm/[email protected]/slick/slick.css"/>

  <script src="https://ajax.googleapis.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>

  <script type="text/javascript" src="//cdn.jsdelivr.net/npm/[email protected]/slick/slick.min.js"></script>

Code to create the slick ->

   $('.carousel--Multi-4').slick({
                        arrows: false,
                        dots:false,
                        slidesToShow: 3,
                        autoplay: configuracion.autoplay,
                        autoplaySpeed: configuracion.duracionTransicion,
                        responsive: [
                            {
                                 breakpoint: 708,
                                 settings: {
                                     dots: true,
                                     infinite: true,
                                     slidesToShow: 1.25,
                                     slidesToScroll: 1,
                                     arrows: false,
                                     infinite: true,
                                     speed: 300
                                 }
                            }
                        ]
                      });

I have 2 dates, one for start and one for end, I try to prevent the start date from being greater than the end date, apart from the fact that I can't do it, I get strange years, days that are not... etc.

                    console.log("start ", m , d ,  y);
                    console.log("fin ", m2 , d2, y2);

                    console.log("-------");

                    console.log("start", new Date(m, d, y));
                    console.log("fin", new Date(m2, d2, y2));

                    if (new Date(m, d, y) > new Date(m2, d2, y2)) {
                        format = false;
                        this.errorServer = true;
                        this.message = "La fecha de inicio no puede ser mayor que la fecha de fin.";
                    }

And the result:

As a result of this change, I don't get the error that the start date is greater...

I am using Springboot , I need to change the value of a variable when it is sent by JSON.

The problem is that in the database it only accepts 0 or 1 and the client expects true or false.

SpringBoot->

@JsonProperty("required")
@JsonFormat(shape = JsonFormat.Shape.BOOLEAN)
private int typerequired;

public int getTyperequired() {
    return typerequired;
}

public void setTyperequired(int typerequired) {
    this.typerequired = typerequired;
}

Angular2->

 console.log("LOS DATOS " , data);
 console.log(typeof(data[0].type));

I get 1 of type Number.

I have to send an Excel from the SpringBoot server to the client in Angular2, The Excel doesn't exist and can't be created because I don't have write permissions, so I'll have to put it in a buffer or something...

The problem I'm having is that I can't put the HSSFWorkbook where I have the data to the response that I have to send to the client.

 @RequestMapping(method = RequestMethod.GET, path = "/{download}/{data}/{nameFile}", produces = MediaType.APPLICATION_JSON_VALUE)
            public synchronized void download(HttpServletResponse response , @PathVariable("data") Boolean data, @PathVariable("nameFile") String nameFile) {

            response.setContentType("application/vnd.openxmlformats-officedocument.spreadsheetml.sheet");
             response.setHeader("Content-disposition", "attachment; filename="+nameFile+"result.xlsx");

             String eyelash = "People";

             try {  
                HSSFWorkbook workbook = new HSSFWorkbook();
                HSSFSheet sheet = workbook.createSheet(eyelash);

                String[] header = { "Name","Surname","Dni","Age","Tlf" };
                HSSFRow rowhead = sheet.createRow((short) 0);
                HSSFCell cell;
                int cellnum = 0;

                if (data) {
                    int myRowData = 1;
                    HSSFRow row = sheet.createRow((short) myRowData);
                    ArrayList list = mlService.selectAll();

                    for (int i = 0; i < list.size(); i++) {
                        row.createCell(0).setCellValue(list.get(i).getName().substring(0, 4));
                        row.createCell(1).setCellValue(list.get(i).getSurname().substring(4, 6));
                        row.createCell(2).setCellValue(list.get(i).getDni());
                        row.createCell(3).setCellValue(list.get(i).getYear());
                        row.createCell(4).setCellValue(list.get(i).getTlf());

                        myRowData++;
                        row = sheet.createRow((short) myRowData);
                    }
                } 

                final InputStream is = new FileInputStream(workbook) ; //error
                IOUtils.copy(is, response.getOutputStream());
                response.flushBuffer();

            } catch (Exception ex) {
                ex.printStackTrace();
                System.out.println(ex.getMessage());
                // deal with error, e.g. response.setStatus(500) to signal an internal server error
            }
    }

Then I expect a boolean and the type of file (there can be many), in this example I have put that it is always the same.

Then the Http response where I add the headers and tell the browser what kind of format the file has.

Then I build the file with HSSFWorkbook, the build is correct And finally I want to send it to the client where I try to put the woorkbook into the file inputStream but it doesn't leave because it's not a file or something like that and supposedly when I get it, it would get into the buffer of the response...

I don't know if I'm on the right track or what... apart from the fact that it gives me an error...

Finally, SpringBoot will create the Excel and send it to the client without having created it.

Thanks.

I want to get a certain date format I receive : "15/03/2016"and I want to get this format2016-03-15T00:00:00+01:00

I have tried with:

  dateStart = new Date(filterDateStart.split('/').reverse().join('/'));
  dateStart = new Date(filterDateEnd).toLocaleDateString();
  dateStart =  new Date(filterDateStart).toISOString();
  dateStart = new Date(filterDateStart.split('/').reverse().toISOString('/'));

None work for me...

I want to change the value of the attributes according to the index but the page stays blank

<div *ngIf="detallePost">
    <div id="accordion" class="container">
        <h2>{{ detallePost.title | uppercase }}</h2>
        <div>
            <span>id del Post : </span>{{detallePost.id}}
        </div>
        <div>
            <span> {{ detallePost.body }}</span>
        </div>
        <ul>
            <li *ngFor="let comment of commentsPost; let i = index">
                <!-- Cabecera -->
                <div class="card">
                    <div class="card-header" id="heading{{i}}">
                        <h5 class="mb-0">
                            <button class="btn btn-link" 
                                    data-toggle="collapse"
                                    data-target="#collapse{{i}}"
                                    aria-expanded="true"
                                    aria-controls="collapse{{i}}">
                                    {{comment.email}}
                            </button>
                        </h5>
                    </div>
                    <!--Final Cabecera-->
                    <!--Texto mostrado-->
                    <div id="collapse{{i}}"
                         class="collapse" 
                         aria-labelledby="heading{{i}}" 
                         data-parent="#accordion">
                        <div class="card-body">
                                {{comment.body}}
                        </div>
                    </div>
                    <!--Final Texto mostrado-->
                </div>
            </li>
        </ul>
        <button (click)="goBack()" class="btn btn-primary">Volver</button>
    </div>
</div>

The error that the console gives is:

Uncaught Error: Template parse errors:
Can't bind to 'target' since it isn't a known property of 'button'. ("
<button class="btn btn-link" 
data-toggle="collapse"
[ERROR ->]data-target="#collapse{{i}}"
aria-expanded="true"
aria-controls="collapse{{i}}">
"): ng:///AppModule/DetallePostComponent.html@17:9
Can't bind to 'aria-controls' since it isn't a known property of 'button'. ("
    data-target="#collapse{{i}}"
    aria-expanded="true"
    [ERROR ->]aria-controls="collapse{{i}}">
    {{comment.email}}
    </button>
"): ng:///AppModule/DetallePostComponent.html@19:9
Can't bind to 'aria-labelledby' since it isn't a known property of 'div'. ("
    <div id="collapse{{i}}"
        class="collapse" 
        [ERROR ->]aria-labelledby="heading{{i}}" 
        data-parent="#accordion">
        <div class="card-body">
"): ng:///AppModule/DetallePostComponent.html@28:7
    at syntaxError (compiler.js:485)
    at TemplateParser.parse (compiler.js:24668)
    at JitCompiler._parseTemplate (compiler.js:34621)
    at JitCompiler._compileTemplate (compiler.js:34596)
    at eval (compiler.js:34497)
    at Set.forEach (<anonymous>)
    at JitCompiler._compileComponents (compiler.js:34497)
    at eval (compiler.js:34367)
    at Object.then (compiler.js:474)
    at JitCompiler._compileModuleAndComponents (compiler.js:34

The attributes I want to modify are:

id="heading{{i}}
data-target="#collapse{{i}}"
aria-controls="collapse{{i}}">
id="collapse{{i}}"
aria-labelledby="heading{{i}}" 

Because I don't want them to be repeated, I have already verified that it {{i}}has values ​​0,1,2... etc.