Postman 401 unauthorized ошибка - Решение и исправление самых разных ошибок на TopOshibok.ru

We quite often see these 401 Unauthorized issues in Postman, even after connected to Dataverse environment and also all the required setups done in Postman.

This issue can be due to the existing Token expiration.

Follow the below steps to regenerate the Token in Postman.

Step 1: Navigate to your collection and Click on Get New Access Token.

Once, you get the New Access Token, you can see the below message.

Step 2: New Token will be generated automatically and Click on Use Token to use this for executing the Web API’s.

Step 3: Click on Access Token dropdown and Click on Manage Tokens.

You can see the all the Tokens information.

All Available Tokens are displayed without a strike text and Expired Tokens are displayed with a strike text.

Step 4: Hover on the Expired Token, Click on Delete icon to delete it.

Step 5: Expired Token is deleted and Close the MANAGE ACCESS TOKENS popup.

Step 6: Go back to your Web API request.

Click on Send to execute your Web API and see the results.

Hope you have successfully resolved this issue and able to connect to Dynamics 365.

Please share your valuable feedback on this article.

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I am developing rest APIs in Spring Boot. I am able to do CRUD operations and postman gives correct responses, but when I add Spring Security username and password Postman gives 401 Unauthorized.

I have provided a spring boot security username and password as below.

application.proptries

spring.jpa.hibernate.ddl-auto=update
spring.datasource.platform=mysql
spring.datasource.url=jdbc:mysql://localhost:3306/pal?createDatabaseIfNotExist=true
spring.datasource.username=root
spring.datasource.password=
spring.datasource.driver-class-name=com.mysql.cj.jdbc.Driver
spring.jpa.properties.hibernate.dialect = org.hibernate.dialect.MySQL5Dialect
spring.security.user.name=root
spring.security.user.password=root

I have done basic auth with username as root and password as root.
Preview request gives headers updated successfully message :

EDIT
I have deleted the cookies in postman but still facing the same issue

SecurityConfing.java
My Security Configuration are as below. 
import javax.sql.DataSource;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.core.annotation.Order;
import org.springframework.jdbc.datasource.DriverManagerDataSource;
import org.springframework.security.config.annotation.authentication.builders.AuthenticationManagerBuilder;
import org.springframework.security.config.annotation.web.builders.HttpSecurity;
import org.springframework.security.config.annotation.web.configuration.EnableWebSecurity;
import org.springframework.security.config.annotation.web.configuration.WebSecurityConfigurerAdapter;

@Configuration
@EnableWebSecurity
@Order(1000)
public class SecurityConfig extends WebSecurityConfigurerAdapter{


    public void configureGlobal(AuthenticationManagerBuilder authenticationMgr) throws Exception {

        authenticationMgr.jdbcAuthentication().dataSource(dataSource())
          .usersByUsernameQuery(
           "select email,password from user where email=? and statusenable=true")
          .authoritiesByUsernameQuery(
           "select email,role from user where email=? and statusenable=true");

        System.out.println(authenticationMgr.jdbcAuthentication().dataSource(dataSource())
          .usersByUsernameQuery(
           "select email,password from user where email=? and statusenable=true")
          .authoritiesByUsernameQuery(
           "select email,role from user where email=? and statusenable=true"));
    }

    @Bean(name = "dataSource")
     public DriverManagerDataSource dataSource() {
         DriverManagerDataSource driverManagerDataSource = new DriverManagerDataSource();
         driverManagerDataSource.setDriverClassName("com.mysql.cj.jdbc.Driver");
         driverManagerDataSource.setUrl("jdbc:mysql://localhost:3306/pal");
         driverManagerDataSource.setUsername("root");
         driverManagerDataSource.setPassword("");
         return driverManagerDataSource;
     }

    @Override
     protected void configure(HttpSecurity http) throws Exception {
    http
    .csrf().disable()
    .authorizeRequests().antMatchers("/login").permitAll()
    .anyRequest().authenticated()
    .and()
    .formLogin().loginPage("/login").permitAll()
    .and()
    .authorizeRequests().antMatchers("/admin/**").hasAnyRole("ROLE_ADMIN","ROLE_USER").anyRequest().permitAll()
    .and()
    .authorizeRequests().antMatchers("/user/**").hasAnyRole("ROLE_USER").anyRequest().permitAll();

}

asked Feb 19, 2019 at 4:29

Romil PatelRomil Patel

12.9k7 gold badges47 silver badges76 bronze badges

@Configuration
public class WebSecurityConfiguration extends WebSecurityConfigurerAdapter {

    @Override
    public void configure(HttpSecurity http) throws Exception {
       http.csrf().disable().authorizeRequests()
        .antMatchers("/").permitAll()
        .antMatchers(HttpMethod.POST,"/newuser").permitAll()
        .antMatchers(HttpMethod.POST, "/login").permitAll()
        .antMatchers(HttpMethod.POST,"/newuser/*").permitAll()
        .antMatchers(HttpMethod.GET,"/master/*").permitAll()
         .antMatchers(HttpMethod.GET,"/exploreCourse").permitAll()
        .anyRequest().authenticated()
    }
}

You need to configure Spring Security, by default all routes all secured for authrorization.

Please have a look JWT Token implementation at this Link.

answered Feb 19, 2019 at 7:41

Nishant VarshneyNishant Varshney

6852 gold badges14 silver badges34 bronze badges

If Authorization needed in spring boot, the below annotation at root configuration class.

@EnableAuthorizationServer
( and other required annotations)
public class Application{
....
....
}

Below dependency also needed to be added

<dependency>
            <groupId>org.springframework.security.oauth.boot</groupId>
            <artifactId>spring-security-oauth2-autoconfigure</artifactId>
        </dependency>

answered Jan 14, 2021 at 10:21

subsub

5271 gold badge7 silver badges24 bronze badges

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Table of content

Introduction
Understanding Error 401
Causes of Error 401
Troubleshooting Error 401
The Ultimate Solution for Access Denied
Conclusion
Frequently Asked Questions

Introduction

Error 401 is a common issue faced by developers when working with API requests in Postman. This error occurs when there is an authorization issue and the server denies access to the requested resource. While the Error 401 may seem straightforward, it can be challenging to diagnose the root cause and find a solution.

In this article, we will explore the ultimate solution for resolving the Access Denied error in Postman. We will delve into the causes of Error 401, the steps you can take to troubleshoot it, and provide a definitive solution to this issue. Following this guide, you will learn how to fix the Error 401 and get back to developing your APIs without interruptions. So buckle up, and let’s get started with the troubleshooting!

Understanding Error 401

Error 401 is a common issue encountered by developers while working with APIs. This error code denotes «Unauthorized» which means that the server is refusing to process the request because of missing or incorrect authentication credentials. In other words, the user does not have the necessary permission to access the requested data or resource.

HTTP response code 401 is designed to prevent unauthorized access to a server or web application. For instance, if you are trying to access a protected resource on a web server without providing valid credentials (such as a username and password), you will receive an HTTP 401 error message. At times, even when you have entered the credentials correctly and the server has determined that you do not have the necessary permission to access the requested resource, you will get an HTTP 401 error.

In the case of APIs, this error may occur when you attempt to connect to an API that requires authentication, but your credentials are either incorrect or have expired. In either situation, the server has denied your access request, resulting in an HTTP 401 error. This error is essential to ensure that web applications and APIs remain secure and that only authorized users can access server resources.

Causes of Error 401

Error 401 is a common error that developers encounter when working with APIs. It indicates that the request made to the server is unauthorized, which means the server is refusing to grant access to the requested resource. There are several reasons why Error 401 occurs in Postman, some of which are:

Invalid Credentials

One of the most common is invalid credentials. This happens when the user provides incorrect login details, such as a wrong username or password. When the server receives the request with invalid or unauthorized credentials, it returns the 401 error.

Expired or Missing Token

Another cause of Error 401 is an expired or missing token. APIs often use tokens to authenticate requests made to the server. If the token is missing or has expired, the server cannot grant access to the requested resource, which results in the 401 error.

Insufficient Permissions

Sometimes, the server may reject a request due to insufficient permissions. This happens when the user does not have the necessary privileges to access the requested resource. The server recognizes this and sends back a 401 error to inform the user that their credentials are not authorized to access the resource.

Server Issues

In rare cases, Error 401 can be caused by server issues, such as a misconfigured server or a server under maintenance. This type of error is temporary, and the server will return to normal operation soon. However, there is nothing that the user can do to fix the error on their end, and they should wait until the server issue is resolved.

Troubleshooting Error 401

When using Postman to test APIs, encountering an Error 401 can be frustrating and confusing. However, there are several troubleshooting steps that can help resolve the issue.

Firstly, it’s important to ensure that the correct authentication credentials are being used. Double-check the username and password, API key, or any other authentication details required for the specific API being tested.

It’s also possible that the issue lies with the server itself. Check if the server is experiencing any downtime or server-side issues, or if the API endpoint has been changed since the original request.

Another possible cause of Error 401 is expired or malformed tokens. Ensure that the token being used is not expired, and if it is, generate a new one. Additionally, make sure the token is formatted correctly according to the API’s requirements.

If none of these solutions work, try reaching out to the API’s support team for further assistance. They may be able to provide specific guidance on how to resolve the issue.

By following these troubleshooting steps, Error 401 in Postman should be resolved and API testing can continue as expected.

The Ultimate Solution for Access Denied

If you’re experiencing an Access Denied error on Postman, don’t worry – you’re not alone. Many developers encounter this issue when attempting to make requests to certain API endpoints. However, there is a simple solution to this problem.

The Access Denied error is typically caused by incorrect or missing authorization credentials. To fix this, you need to verify that the authentication headers you’re using are correct. Check that you’re using the correct authentication token or key, and that it’s formatted correctly. Additionally, ensure that you’re passing the necessary authentication headers in the request.

In some cases, you may also need to check if the API endpoint you’re attempting to access requires specific permissions or roles. Make sure that you have the appropriate permissions or roles assigned to your account.

By following these steps, you’ll be able to troubleshoot the Access Denied error and successfully make requests to your desired API endpoints in Postman. So, next time you encounter this error, rest assured that there is an ultimate solution that you can easily implement.

Conclusion

In , Error 401 in Postman can be a frustrating roadblock for developers trying to debug their API calls. However, with the right tools and knowledge, it is possible to troubleshoot and solve the issue. The first step is to check for issues with the authentication credentials, such as incorrect usernames or passwords. If these are correct, then the issue may lie with the API server itself, and contacting the server administrator may be necessary.

Another solution for error 401 in Postman is to check for expired tokens or session IDs. If these are the problem, then generating new tokens or refreshing sessions is necessary. Additionally, double-checking the formatting of the request headers is important, as even a small mistake can cause the error.

Overall, the ultimate solution for access denied error 401 in Postman is persistence and attention to detail. By using the aforementioned troubleshooting techniques and ensuring that all authentication and request parameters are accurate, developers can overcome this common error and successfully debug their API calls.

Frequently Asked Questions

Q: What is Error 401 in Postman?

A: Error 401 in Postman is a response status code that indicates access to the requested resource is denied due to unauthorized credentials.

Q: How can I fix Error 401 in Postman?

A: There are a few things you can try to fix Error 401 in Postman:

Ensure that you are correctly authenticated and have the proper authorization credentials. Check that you have included the correct username and password, API key, or access token in your request.
Check for any typos or errors in your authentication credentials. Even a small mistake can cause the authentication to fail and result in an Error 401 response.
Make sure that the server you are trying to access is properly configured to recognize the authentication credentials you are providing. Some servers may have specific requirements for authentication that must be met in order to access resources.
Verify that your request is correctly formatted and includes all the necessary data. If your request is missing any required parameters or includes invalid data, it may not be able to authenticate properly.

Q: Can Error 401 be caused by server-side issues?

A: Yes, Error 401 can be caused by server-side issues such as incorrect server configuration or issues with the authentication process on the server side. However, in most cases, it is caused by client-side issues such as incorrect authentication credentials or formatting errors in the request.

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