Technology Sharing

한어Русский языкEnglishFrançaisIndonesianSanskrit日本語DeutschPortuguêsΕλληνικάespañolItalianoSuomalainenLatina

Table of contents

1. HTTP Error 400 Bad Request

1. Understanding 400 Bad Request Error

2. Troubleshoot 400 Bad Request Error

3. Common solutions

2. HTTP Error 401 Unauthorized

1. Understanding 401 Unauthorized Error

2. Troubleshoot 401 Unauthorized Errors

3. Common solutions

---

one,HTTPError 400 Bad Request

During the development process, we often encounter various errors, among which 400 Bad Request may be one of the most common. This error meansserverWe cannot understand your request. This may be due to incorrect request format, missing required parameters, or invalid request content.

1. Understanding 400 Bad Request Error

400 Bad Request is aClientError, indicating that there is a problem with the request itself and the server cannot process it. It is usually caused by the following reasons:

• Request syntax error:The request format does not comply with the HTTP protocol specification, for example, it is missing necessary header information or uses an incorrect HTTP method.
• Missing required parameters:Certain parameters are required by the server to process the request, but they are missing from the request.
• Invalid request content:The request body contains invalid data, such as malformed JSON data or a file size that exceeds the server's allowed range.
• Unsupported media type:The server does not support the media type specified in the request, for example, an unsupported Content-Type header was used in the request.

2. Troubleshoot 400 Bad Request Error

Check the request method and URL:

• Make sure you use the correct HTTP method (GET, POST, PUT, DELETE, etc.) to access the resource.
• Verify that the URL is correct, including the path, parameters, and query string.

Check the request headers:

• Make sure the request contains all necessary header information, such as Content-Type, Accept, etc.
• Check that the header values ​​are correct, for example the Content-Type value should match the request body content type.

Check the request body:

• If the request contains a request body, check whether its format is correct. For example, JSON data should comply with the JSON specification.
• Confirm that the data in the request body is complete and correct, and that no required fields are missing or contain invalid values.
• Check if the request body size exceeds the server limit.

Check the server logs:

• Review the server logs for details about the error, such as the error code, request path, and request parameters.
• The log information may provide clues as to the cause of the error.

Using debugging tools:

• Use browser developer tools or other network debugging tools to view detailed information about requests and responses, such as request headers, request bodies, and response status codes.
• Debugging tools can help you gain more insight into the request process and identify errors.

3. Common solutions

• Proofreading request syntax:Check the request format carefully to ensure that it complies with the HTTP protocol specification.
• Add the missing parameters:Verify that the request contains all required parameters and check that the parameter values ​​are correct.
• Correction request content:Check the request body format and content to ensure that it meets the server requirements.
• To change the media type:If the server does not support the media type in the request, try using another supported media type.

A 400 Bad Request error usually means that there is a problem with the request. You need to carefully check the request format, header information, request body, and server log information to find the cause of the error and fix it.

HTTP Errors401 Unauthorized

When interacting with a server, you may encounter a 401 Unauthorized error, which means that the server rejected your request because you do not have sufficient permissions to access the resource. This usually means that you need to provide valid authentication credentials to access the protected resource.

This article will detail how to troubleshoot 401 Unauthorized errors and provide some common solutions.

1. Understanding 401 Unauthorized Error

401 Unauthorized is an authentication error that means the server needs you to provide authentication information to access the requested resource. It is usually caused by the following reasons:

• Missing authentication information:The request did not include any authentication information, such as a username and password or an API key.
• Invalid authentication information:Wrong authentication information was provided, such as an incorrect username, password, or expired API key.
• Insufficient permissions:Even if authentication succeeds, you might still not have permission to access the resource.

2. Troubleshoot 401 Unauthorized Errors

Check the request headers:

• Make sure the request contains the necessary authentication headers, such as the Authorization header.
• Check whether the value of the Authorization header is correct. For example, Basic authentication requires a Base64-encoded username and password.

Verify the authentication information:

• Confirm that your username and password or API key are correct.
• Check if the API key is expired or disabled.

Check permissions:

• Verify that you have permission to access the resource.
• If it is an API request, please refer to the API documentation to understand the required permissions and access control mechanism.

View the server log:

• Review the server logs for details about the error, such as the error code, request path, and request headers.
• The log information may provide clues as to the cause of the error.

Using debugging tools:

• Use browser developer tools or other network debugging tools to view detailed information about requests and responses, such as request headers, request bodies, and response status codes.
• Debugging tools can help you gain more insight into the request process and identify errors.

3. Common solutions

• Provide the correct authentication information:Make sure that your request includes a valid username, password, or API key.
• Use the correct authentication method:Confirm that the authentication method used in the request is consistent with the server's requirements, such as Basic authentication, OAuth 2.0, etc.
• Check permissions:Verify that you have permission to access the resource and, if necessary, contact your administrator to obtain the necessary permissions.
• To update your API key:If the API key has expired or is disabled, generate a new API key and use the new key to make requests.

A 401 Unauthorized error usually means that you need to provide valid authentication information to access protected resources. Checking the request headers, verifying the authentication information, checking permissions, and viewing the server logs can help you find the cause of the error and fix it.