Ошибка post 422

400 Bad Request would now seem to be the best HTTP/1.1 status code for your use case.

At the time of your question (and my original answer), RFC 7231 was not a thing; at which point I objected to 400 Bad Request because RFC 2616 said (with emphasis mine):

The request could not be understood by the server due to malformed syntax.

and the request you describe is syntactically valid JSON encased in syntactically valid HTTP, and thus the server has no issues with the syntax of the request.

However as pointed out by Lee Saferite in the comments, RFC 7231, which obsoletes RFC 2616, does not include that restriction:

The 400 (Bad Request) status code indicates that the server cannot or will not process the request due to something that is perceived to be a client error (e.g., malformed request syntax, invalid request message framing, or deceptive request routing).

However, prior to that re-wording (or if you want to quibble about RFC 7231 only being a proposed standard right now), 422 Unprocessable Entity does not seem an incorrect HTTP status code for your use case, because as the introduction to RFC 4918 says:

While the status codes provided by HTTP/1.1 are sufficient to
describe most error conditions encountered by WebDAV methods, there
are some errors that do not fall neatly into the existing categories.
This specification defines extra status codes developed for WebDAV
methods (Section 11)

And the description of 422 says:

The 422 (Unprocessable Entity) status code means the server
understands the content type of the request entity (hence a
415(Unsupported Media Type) status code is inappropriate), and the
syntax of the request entity is correct (thus a 400 (Bad Request)
status code is inappropriate) but was unable to process the contained
instructions.

(Note the reference to syntax; I suspect 7231 partly obsoletes 4918 too)

This sounds exactly like your situation, but just in case there was any doubt, it goes on to say:

For example, this error condition may occur if an XML
request body contains well-formed (i.e., syntactically correct), but
semantically erroneous, XML instructions.

(Replace «XML» with «JSON» and I think we can agree that’s your situation)

Now, some will object that RFC 4918 is about «HTTP Extensions for Web Distributed Authoring and Versioning (WebDAV)» and that you (presumably) are doing nothing involving WebDAV so shouldn’t use things from it.

Given the choice between using an error code in the original standard that explicitly doesn’t cover the situation, and one from an extension that describes the situation exactly, I would choose the latter.

Furthermore, RFC 4918 Section 21.4 refers to the IANA Hypertext Transfer Protocol (HTTP) Status Code Registry, where 422 can be found.

I propose that it is totally reasonable for an HTTP client or server to use any status code from that registry, so long as they do so correctly.

But as of HTTP/1.1, RFC 7231 has traction, so just use 400 Bad Request!

HTTP error 422 is not as common as other codes such as 404 or 500. This particular error can be hard to diagnose as it doesn’t provide you with much information about what part of your request is causing the problem.

Broadly speaking, if you see an HTTP 422 error it means the server understands your request, but it can’t fulfill it due to a problem on your end. If you fix that problem, you should be able to reload the page and the error will go away.

In this article, we’ll talk about what causes the 422 error and how to troubleshoot it if you’re using WordPress. Let’s get to it!

Check Out Our Video Guide to the 422 Error

What Is the HTTP 422 Error?

Error 422 is an HTTP code that tells you that the server can’t process your request, although it understands it. The full name of the error code is 422 “unprocessable entity.”

In a nutshell, the error means that you’re making a request the server understands, but it can’t process it. Typically, this happens because there’s a semantic error somewhere in the request, usually within a PHP or JavaScript file.

Unlike other HTTP errors, the 422 code will keep reappearing until you manage to troubleshoot the problem with your request. However, this can be difficult since the error doesn’t provide specific information about what part of the request it can’t process.

What Causes the HTTP 422 Error?

Typically, the HTTP 422 code pops up when there’s a semantic error in the contents of a request. If you’re using WordPress, that usually means one of two things:

1. One of the files involved in the request contains code with semantic errors. To put it another way, there’s an error somewhere in the code.
2. You’re dealing with a corrupt database table.

One problem with error 422 is that there’s no way of knowing what its cause is at first glance. This means you may need to try more than one troubleshooting method until you arrive at the problem.

HTTP error 422 may not be as common as other codes such as 404 or 500- but don’t worry! 😅This guide is here to help 🚀Click to Tweet

You can check the HTTP response code of any page using our HTTP header Checker tool.

How To Fix the 422 Error in WordPress (2 Methods)

In this section, we’ll show you how to repair a corrupted WordPress database and how to identify files with semantic code errors. These steps will also help you debug other issues, such as the HTTP 400 error.

1. Repair a Corrupted WordPress Database

In some cases, tables within the WordPress database might become corrupted during an update. This means that if you’re updating a plugin, theme, or WordPress itself and the process is interrupted, database entries can start presenting errors.

A corrupt database can lead to all sorts of errors within WordPress, such as pages not loading, features not working correctly, and HTTP codes such as 422. There are two ways to repair a corrupted WordPress database. The easiest approach is to use a plugin such as WP-DBManager:

Once you activate WP-DBManager, you’ll get access to a new Database tab in the dashboard. Go to Database > Repair DB and select the tables that you want to repair. Since you may not know which table is corrupt, select them all and click on Repair:

The process should only take a few seconds and you’ll see a success message when it’s ready. Now, try accessing the page that returned the 422 error to see if it persists.

If you don’t have access to the WordPress admin due to the 422 error, you can repair the database manually. To do so, you’ll need to access the database from your hosting control panel.

If you use Kinsta, you can access the database from your MyKinsta dashboard. Select a website and go to the Info tab. Look for the Database access section, where you’ll find the login credentials for the database. Click on Open phpMyAdmin and enter those credentials:

Select the database you want to repair from the menu to the left and you’ll see a breakdown of all the tables it contains to the right. Use the Check all option at the bottom of the page to select every table. Then, look for the Repair table option in the menu to the right:

Click on the Go button and wait for phpMyAdmin to return a success message. Now, go ahead and check if the HTTP 422 error persists.

2. Use the WordPress Error Logs To Identify HTTP 422 Code Causes

If repairing the database doesn’t make error 422 go away, the problem lies with one of the WordPress files. Since every WordPress installation contains dozens to hundreds of files, it’s not feasible to check all of them for semantic code errors.

Your best bet, in this scenario, is to enable the WordPress debug feature, which will give you access to error logs. To enable the WordPress debug mode manually, you’ll need to edit the wp-config.php file in the root directory.

You can do that by accessing your website via a File Transfer Protocol (FTP) client and locating the wp-config.php file. Open the file and add the following two lines of code before the line that says /* That’s all, stop editing! Happy blogging. */:

define( 'WP_DEBUG', true );

define( 'WP_DEBUG_LOG', true );

If the WP_DEBUG line already exists, make sure that it reads true and simply add the second line of code (the WP_DEBUG_LOG entry). Save the changes to the file and reload the page that returns the 422 error.

The error should persist, but now you have access to error logs. To read those logs, navigate to the wp-content folder inside the root directory and look for the debug.log file. You can open the file using a text editor.

If the file is new, it should only contain a few lines, one of which should refer to the error that’s causing the 422 code. The error should point you towards a specific file that’s causing the problem. It should also include information about which line within the file contains a semantic error.

If you use Kinsta, you don’t have to enable the WordPress debug mode or error logs manually. Instead, go to MyKinsta, select a website, and jump to the Tools tab. Inside you’ll find an option for enabling WordPress debugging:

After enabling debugging, you can go to the Logs tab and select the error.log option. MyKinsta will display the latest errors on your website and the viewer includes a search feature to help you find specific entries:

Focusing on the latest entries should help you identify which file is causing the 422 error. Once you identify the file, you can try and fix the semantic error or replace it with a stock version from WordPress.

Learn what causes what 422 error and how to troubleshoot it if you’re using WordPress, all in this guide 😄Click to Tweet

Summary

Identifying what’s causing the HTTP 422 error can be somewhat complicated. However, troubleshooting the error doesn’t take all that long. The process is much simpler if you’re using WordPress, as the software comes with tools that can help you when it comes to debugging errors.

If you run into the HTTP 422 error in WordPress, there are two ways that you can fix it:

1. Repair a corrupted WordPress database.
2. Use the WordPress error logs to identify the causes of the 422 code.

With Kinsta, troubleshooting errors is much easier. Our MyKinsta dashboard includes built-in tools for debugging WordPress. If you don’t want to troubleshoot issues manually, you can always reach out to our support team!

A brief tutorial on what a 422 Unprocessable Entity error code is, what it means, what causes it, and how to fix http 422 error details are provided below.

Consider the following scenario: your website is down for a few hours.

Almost certainly, the answer to that question is «panic.»

What would happen if the company did not make a profit for the whole day? That’s more like «starting to get quite concerned.»

Imagine that your website has been down for a few days as a result of a 422 Unprocessable Entity error message on your server. Not only are you losing out on potential cash from purchases, but you’re also losing out on the possibility to rank better in search engine results pages as a consequence of your actions (SERP).

Getting back up and running as fast as possible after experiencing a 422 Unprocessable Entityerror will be covered in this post.

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What Is Http 422 Error?

A 422 status code is returned when a request is well-formed, but it is unable to be processed owing to semantic issues in the request body. It was defined in RFC 4918 and is more specifically aimed at how to fix http 422 error extensions for Web Distributed Authoring and Versioning (WDAV) (WebDAV).

Whether or not developers should return a 400 or 422 error to customers is a topic of debate in the IT community (more on the differences between both statuses below). However, it is generally acknowledged that the 422 status code should only be returned if the server is capable of supporting WebDAV capabilities.

In this case, the server understands the content type of the request entity (thus, a 415 (Unsupported Media Type) status code is inappropriate), and the syntax of the request entity (thus, a 400 (Bad Request) status code is inappropriate), but it was unable to process the instructions contained within the request entity due to an error in the server’s processing. For example, if the body of an XML request includes well-formed (i.e., syntactically accurate) but semantically incorrect XML instructions, this error condition may result.

>>> Wix 404 Error: How To Fix

What Are The Causes For HTTP 422 Error?

The most typical reason for how to fix http 422 error code is a database table that has been badly constructed or that has been corrupted; these tables must be fixed or removed and regenerated.

In certain cases, this 422 error occurs because a script is attempting to execute on the server but the server does not have authorization to access that specific file. This might indicate that you need new permissions on your web hosting account, or it could indicate that your site’s root folder has a PHP configuration that has been incorrectly configured.

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Status Codes 400 Versus 422

In order to prevent bad request errors, the 400 status code should be used and delivered to the client if the request syntax is faulty, the request message framing is wrong, or the request routing comprises deceptive request routing. However, one minor piece of information separates this status code from the 422 Unprocessable Entity status code: the syntax of a request entity generating a 422 error is proper, while the syntax of a request entity generating an error code 400 is wrong.

When it comes to how to fix http 422 error, it should only be used in the most specific of circumstances. The 400 Bad Request status code should be used in the vast majority of other situations when a client fault has occurred as a result of incorrect grammar.

>>> Fix 308 Error Code: Troubleshooting Tips You Need to Know

Is The Problem On The Server Or On The client?

Unprocessable Entitystatus is a client-side error code that indicates that an entity cannot be processed. It is a member of the 4xx group of HTTP response status codes, which are sometimes known as client error replies.

HTTP status codes such as how to fix http 422 error are found in the 4xx category:

• 400 Unauthorized Request
• 401 Unauthorized Access Denied
• 403 Unauthorized
• 404 Not Found 404 Not Found
• Method 405 is not permitted.
• 406 Not Acceptable Status is assigned.
• 410 Gone is the answer.
• 429 There are too many requests.

In a nutshell, 4xx errors imply that the page you requested could not be located and that something went wrong with your request during processing. Because the problem is occurring on the client side of the equation, rather than on the server side of things,

There is a statistically significant difference between the mistakes in the 4xx category and the errors in the 5xx category. When it comes to client-side errors, the errors in the 4xx category are client-side errors when it comes to server-side errors. These failures are not the fault of the client, but rather indicate that something is wrong on the server’s end of the transaction.

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How Do I Resolve a 422 Unprocessable Entity Error?

If you’re not receiving any notifications regarding the issue, it’s possible that your web server does not enable you to read these logs. If this is the case, we suggest that you switch service providers as soon as possible. How to fix http 422 error might be indicative of a more serious problem with your site, such as malware or anything else that is connected to website security.

If you are able to get access to your logs, the next step is to search for any anomalies. These problems may be generated by a script that is attempting to execute but is unable to do so due to insufficient permissions on the web server or an incorrectly configured PHP configuration in the root folder of your website. If this does not work, it is possible that there is a problem with the script itself, which may be resolved by contacting the script’s creator.

Alternatively, you may try uploading a new version of the script to your server in order to resolve the 422 Unprocessable Entity error code. Some individuals can do this themselves using FTP, while others may need help from their web hosting company to do this.

Finally, if you are still unable to resolve the problem, consider contacting a web development community such as Stackoverflow for assistance. You may also provide an example piece of your code in order to see if someone can assist you in identifying the source of the issue.

>>> Authentication Via Proxy Server Failed: How to Fix

Conclusion

After everything is said and done, the 422 status code isn’t used very much anymore. Since the publication of RFC 7231, the 400 Bad Request status code has gained widespread acceptance and is now often used in line with the 422 status code. In certain cases, however, such as when using WebDAV and needing to return a response code for a request that was syntactically valid but semantically erroneous, how to fix http 422 error code may be appropriate in such situations.

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