safari network error 303

How To Fix the HTTP 303 Status Code (3 Methods)

The HTTP 303 Status Code occurs when a page has been temporarily moved. As a result, the server can’t connect to the requested resource. Instead, you’ll be redirected to a new page . Not only is this frustrating, but it can also lead to other problems such as infinite loops and caching issues.

Fortunately, it’s easier to fix the 303 See Other code when you know what’s causing the message. For instance, you might need to check your server configuration or enable debugging in WordPress to view your error log .

In this post, we’ll take a closer look at the HTTP 303 Status Code. Then, we’ll discuss some common causes before we show you how to fix them. Let’s get started!

Check Out Our Video Guide To Fixing the HTTP 303 Status Code :

What Is the HTTP 303 Status Code?

When you’re presented with the HTTP 303 Status Code, it means that the redirects don’t connect to the recently transferred resource. Instead, they connect to another page like a transfer page.

The message is a way for servers to tell browsers that a page has been temporarily moved. So, while the server successfully received the data for the HTTP request , you’ll need to send a new GET request to the new URL .

The 303 See Other Code reaction (as it’s also known) is usually the result of PUT or POST requests. Sometimes, it can also be caused by DELETE. Since the browser handles the code by displaying a new location, you will be redirected in WordPress  without needing to take action

However, there are some problems associated with the status code:

• It can lead to infinite loops . This can happen if each page redirects the user back to the original resource.
• It makes it difficult for caching proxies to cache resources . Typically, proxies only cache resources that are returned with a 200 status code.
• It can lead to increased bandwidth usage and poor performance . This can occur when these 303 resources aren’t cached.

It’s also important to be aware that the 303 Status Code works differently from any other HTTP status codes . For instance, the HTTP 301 Status Code also presents a redirection message, but you’ll only see this message when the page has been moved permanently.

Additionally, HTTP 302 Status Code  is the sibling of the 303 Status Code. However, this is only utilized for impermanent diversions.

Meanwhile, the HTTP 304 Status Code (otherwise known as Not Modified) means that the resource hasn’t been changed. Therefore, when you see this message, it’s best to hold on to the duplicate.

What Causes an HTTP 303 Status Code?

The HTTP 303 Status Code simply indicates the result of a client’s request. It’s a greatly misunderstood status code because most users assume that it represents an error. In fact, all it means is that the server is redirecting you to a new location.

Here are some of the reasons why you might see the HTTP 303 Status Code:

• There’s been a change in the location of a resource . For instance, it may have been moved to a different URL.
• There’s been a change in the way the resource is accessed . For example, it might not be readily accessible or publicly available anymore.
• The server has been misconfigured . This is a common occurrence.
• There is a problem within your application . This typically occurs when your client application contains some custom code that’s triggering the message.

Typically, it’s easy to fix the HTTP 303 Status Code when you know what’s causing the issue.

How To Fix an HTTP 303 Status Code

Now that you know a bit more about the HTTP 303 Status Code, let’s take a look at some simple ways to fix it.

However, before we get started, it’s important to make a backup of your website . That’s because some of these troubleshooting steps require you to edit your site files, which can be a delicate task.

You might also prefer to run these fixes in a staging environment  first. Then, once you’re sure everything is working, you can push the changes to your live website.

1. Check Your Server Configuration

To find out what’s causing the 303 redirects, you can check the configuration files for your server software, looking for unintentional redirect instructions. However, first, you’ll need to determine which web server software you’re using.

Nginx and Apache  tend to be the most popular options, so your server is most likely using one of these. In this section, we’ll show you how to check your configuration files for Apache.

To get started, you’ll need to access your site files. If your web host uses cPanel , you can access its File Manager to do this.

Alternatively, you can connect to your site files using SFTP . For this approach, you’ll need to download an FTP client such as FileZilla . You’ll also need your FTP credentials.

With MyKinsta locating your FTP credentials is simple. Just navigate to your dashboard and click on your website. Then, in the Info tab, scroll down to the SFTP/SSH section:

Once you’ve established a connection with your FTP client, locate your root directory, which is usually labeled public_html . Then, look for your .htaccess  file:

Next, open this file in a text editor and look for lines that use RewriteXXX directives. A RewriteCond directive defines a text-based pattern that gets matched against entered URLs.

If a matching URL is requested by a visitor, the RewriteRule directive that follows RewriteCond directives performs the redirection to the new URL. At the end of the RewriteRule look out for [R=303].

If you find this value entered after the RewriteRule, you can try temporarily commenting them out. To do this, use the # character prefix. Then, restart the web server and see if the 303 Status Code has cleared.

2. View Your Server Logs

Most applications keep some kind of server log where you can keep track of all activity. For instance, these server application logs can reveal which pages have been requested and which database results have been provided.

Meanwhile, web server logs concern the hardware that runs your website, providing information about the health and status of connected services (and the server itself). So, you can try to resolve the 303 status code by finding your server log  and analyzing its contents.

If your website is hosted with Kinsta, you’ll get access to three types of log files in MyKinsta:

• error.log (specific errors, including PHP errors , are logged here)
• kinsta-cache-perf.log  (cache error status for requests are stored here like hit, miss, bypass)
• access.log  (here, you’ll find all Nginx requests for the current day)

To view these logs, you’ll need to log into your MyKinsta dashboard. Then, click on WordPress Sites in the menu on the left-hand side of your screen. Now, choose the website that you want to view the logs for and click on the Logs tab:

The first log file you’re able to view is the error.log. But you can use the dropdown menu to select any of the logs that you want to check out:

Once you’ve chosen the log you’d like to view, you’ll see a list of all the errors or requests that have taken place on your site:

You can also use the search bar to search for specific text in the file. Plus, you can use SFTP to download the log to your computer.

While accessing your server logs isn’t a solution in itself, analyzing them can help you figure out the issue that’s triggering the 303 Status Code.

3. Debug Your Application

Lastly, you may want to try debugging your client application. This option is best if there is some custom code in your application that’s causing the HTTP 303 Status Code.

To begin, make a copy of your site in a local environment. This way, you can recreate the exact scenario in which the 303 status code occurred. You’ll also be able to view the application code the moment something goes wrong.

To enable debugging in WordPress , it’s easiest to use a plugin like WP Debugging :

Alternatively, you can do this manually by editing your wp-config.php  file. Again, you’ll need to access your site files via cPanel or using an FTP client. Then, find the file in your website’s root folder.

Once you’re in the wp-config.php  file, head to the bottom of the file where it says “ That’s all, stop editing! ” Then, add the following code :

Now, you can view your site’s errors by locating your wp-content folder. If the debug was successful, you’ll be able to spot a debug.log  file that’s only visible once WordPress has entered debug mode.

You can download the file to view it on your computer and find the error that’s causing the HTTP 303 Status Code. After that, you can disable debug mode by changing the values to “false” or deleting the lines of code completely.

Does an HTTP 303 Status Code Affect SEO?

If you’re concerned about your website’s visibility, then you might be wondering how the 303 HTTP Status code affects Search Engine Optimization (SEO) .

The good news is that the 303 See Other code is unlikely to have any significant impact on your site’s SEO. The main purpose of the message is to tell the client that the requested resource has been moved.

Therefore, the client needs to make a new request to the new location in order to access the resource. The 303 Status Code is designed to be used for GET requests only. So, clients should use the new URL when they make future requests to the resource.

While the 303 Status Code is unlikely to affect SEO, the related HTTP 301 and HTTP 302 Status Codes can. That’s because these are used for permanent and temporary redirects. Therefore, they can transfer your site’s link equity.

The HTTP 303 Status Code is an extremely frustrating error. What’s more, it’s widely misunderstood, so it can be challenging to resolve. Fortunately, there are ways to fix the 303 See Other message and enable the server to connect to the requested resource.

For example, you might need to check your server configuration files and look for unintentional redirects. Additionally, you can view your server logs or debug your application to find the error that’s causing the HTTP 303 Status Code.

Another way to decrease your site’s chances of experiencing problems is by using a quality web host like Kinsta . But, just in case you do run into any issues, all of our plans offer top-notch support to help you troubleshoot. Check out our plans to get started !

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kCFErrorDomainCFNetwork error 303 - bbc.co.uk login window

people. I cannot get passed this bloody error message

kCFErrorDomainCFNetwork 303

I get a blank page on safari (All latest software across the board for oct 2017) and that's it. If i turn off virus protection, still can't get passed this blank screen and error message. I am now getting annoyed. Who has the answer?

page address is - Sign in

PS If i open the page on my iPhone, it opens fine

MacBook Pro, macOS Sierra (10.12.6)

Posted on Oct 12, 2017 5:05 AM

Posted on Oct 12, 2017 8:52 AM

It was the rebooting in safe mode that sorted the issue. I did open safari and the webpage ok there and signed in. Then restarted and all is ok: i can sign in. So I presume something was corrupt and the reboot in safe mode re-wrote a preference or something th awdid the trick. Thank s for the direction Eric

Loading page content

Page content loaded

Oct 12, 2017 8:52 AM in response to Daren Pearson

Oct 12, 2017 8:08 AM in response to Daren Pearson

Loads fine for me in Safari 11.

Safari/Preferences/Advanced - enable the Develop menu, then go there and Empty Caches. Quit/reopen Safari and test. Then try Safari/History/Show History and delete all history items. Quit/reopen Safari and test. You can also try try Safari/Clear History…. The down side is it clears all cookies. Doing this may cause some sites to no longer recognize your computer as one that has visited the web site. Go to Finder and select your user/home folder. With that Finder window as the front window, either select Finder/View/Show View options or go command - J. When the View options opens, check ’Show Library Folder’. That should make your user library folder visible in your user/home folder. Select Library/Caches/com.apple.Safari/Cache.db and move it to the trash.

Go to Safari Preferences/Extensions and turn all extensions off. Test. If okay, turn the extensions on one by one until you figure out what extension is causing the problem.

Safari Corruption See post by Linc Davis

Safari Reset

If that doesn't work, try running this program in your normal account , then copy and paste the output in a reply. The program was created by etresoft, a frequent contributor. Please use copy and paste as screen shots can be hard to read. On the screen with Options, please open Options and check the bottom 2 boxes before running. Click “Share Report” button in the toolbar, select “Copy Report” and then paste into a reply. This will show what is running on your computer. No personal information is shown.

Etrecheck – System Information

Oct 12, 2017 8:40 AM in response to Daren Pearson

Hasn't sorted the issue yet, I have deleted quite a few things: even got rid of those persistent cookies in the process.

Will look at the other options in the near future Eric. Thanks again and watch this space - if other options are not available that is 😉

Oct 12, 2017 5:06 AM in response to Daren Pearson

that link in long hand https://session.bbc.co.uk/session?ptrt=https%3A%2F%2Fwww.bbc.co.uk%2F&userOrigin =homepage&context=homepage

Oct 12, 2017 5:09 AM in response to Daren Pearson

PPS opens fine in Firefox

Oct 12, 2017 8:09 AM in response to Eric Root

cheers Eric, on to it and will post results 🙂

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Failed to open page: kCFErrorDomainCFNetwork error 303

I am running Zend Server on my Mac, working on a local PHP (Zend Framework) project. I've never come across this problem before, but there are certain lines in my code that trigger an error in my Safari console when I load the page:

The operation couldn’t be completed. (kCFErrorDomainCFNetwork error 303.)

The Apache error log has this:

[notice] child pid 17822 exit signal Bus error (10)

However, by changing little things about the code that shouldn't matter (commenting out lines, rearranging lines, changing the contents of a string), it randomly works (or doesn't work). The same code works fine on my co-worker's MAMP server and on our Ubuntu dev server.

I'm totally stuck. I am only assuming that there is some sort of bug in Zend Server that is causing this issue. Is there any way to resolve it?

• zend-server

• Have you resolved this issue? –  Volodymyr Machula Mar 23, 2017 at 9:34

The problem is a result of Safari holding too much local data for the site in question and failing to deal with that correctly. I use archive.org a lot so I had lots of LocalStorage and Cookie data for that site. The fact that this data is only in my main browser Safari and not in any of my other browsers explains why they could browse the site just fine.

So, the solution:

• Go into Safari > Preferences > Privacy
• Search for the affected domain name (for me this was "archive.org")
• Click Remove
• The problem goes away!

Here's a video showing the problem before and after: https://i.stack.imgur.com/Oqww1.jpg

You must log in to answer this question.

Not the answer you're looking for browse other questions tagged apache-2.2 zend-server ..

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Tech explained with easy terms

HTTP 303 – A Beginner’s Guide to the See Other Response

If you’ve ever used the internet, you’ve probably encountered a 303 status code. You may not have known what it was called, or what it meant, but you’ve seen it. The HTTP 303 status code is essentially a way for servers to tell browsers that a page has been moved temporarily. In this blog post, we’ll take a closer look at the 303 status code, and some of its potential uses. We’ll also discuss some of the most common problems people encounter with this code.

Table of Contents

What is http 303 code

The HTTP 303 is a status code that indicate that the web server is redirecting the user to another resource because the original target resource/requested resource has been placed to different place. The new resource is typically provided as a response to the user’s request. When a user agent receives an HTTP 303 status code, it firstly requests the new resource from the location indicated by the Location header before returning any content to the user. This allows for a greater degree of control over how users are redirected to new resources. In addition, it allows for content to be provided to the user without them having to make a new request. The HTTP 303 is an important status code that can help to improve the usability of a website.

How does the browser handle 303 http status code

The browser handles this status code by automatically fetching the new location and displaying it to the user. This allows for a seamless experience for the user, as they are effectively redirected to the new page without having to take any action. In most cases, the browser will also cache the new location so that future requests can be handled more quickly. However, if the 303 status code is accompanied by a “Cache-Control: no-cache” header, then the browser will not cache the new location and will instead fetch it afresh each time. This is typically done to ensure that the latest version of the page is always displayed to the user.

Common problems with 303 http status code

The 303 status response code is one of the many HTTP status codes used by web servers to indicate the result of a client’s request. It is also one of the most misunderstood status codes, as many people incorrectly assume that it represents an error. In reality, the 303 status code simply means that the server is redirecting the client to another resource. This redirection can be caused by a number of factors, such as a change in the location of a resource or a change in the way that the resource is accessed. Regardless of the cause, it is important to be aware of the potential problems that can arise from using the 303 status code.

One of the most common problems with 303 status codes is that they can lead to infinite loops. For example, if a server redirects a client to a different resource, but that resource also redirects the client back to the original resource, then the client will be stuck in an infinite loop. This can obviously cause major problems for both the client and the server. Another problem with 303 status codes is that they can make it difficult for caching proxies to cache resources. This is because caching proxies typically only cache resources that are returned with a 200 status code. As a result, they will often not cache resources that are redirected with a 303 status code, which can lead to increased bandwidth usage and decreased performance.

How to fix 303 http status code

It should be noted that some older browsers do not support the 303 status code and will instead treat it as a 302 status code. As a result, it is important to check your server’s compatibility before implementing this code.

Ways to fix any 303 http status code issues:

1. Redirect the URL

One way to fix a 303 status code is to redirect the URL to a different page. This can be done using an .htaccess file or by editing the server’s configuration file.

2. Set the correct headers

Another way to fix a 303 status code is to set the correct headers. This can be done by setting the Location header to the correct URL.

3. Use a different http method

If you are using a POST method , you can try using a different request method such as GET method or HEAD.

4. Check for errors

It is also important to check for any errors that may have caused the 303 status code to be returned. This can be done by checking the server’s error logs.

5. Contact the website owner

If you are still having trouble, you can try contacting the website owner or administrator for help.

303 http status code example

1. The 303 status code indicates that a resource has been moved to another location, typically in response to a POST request or GET request.

2. The 303 status code can be used in conjunction with the Location header to redirect the user to the new location.

3. The 303 status code is often used in place of the 302 status code, as it is more specific and therefore less likely to be misinterpreted by the user agent.

4. The 303 status code should only be used when the new location is known and can be specified in the Location header.

5. The 303 status code should not be used if the new location is not known or cannot be specified in the Location header.

Similar http status codes

There are a number of different http status codes that indicate a similar or related condition. The 303 http status code indicates that a resource has been moved and is now available at a different location. This is similar to the 302 http status code, which indicates that a resource has been temporarily moved and is available at a different location. The 307 http status code indicates that a resource has been moved permanently and is now available at a different location. These status codes are all part of the 3xx class of status codes, which indicate redirection. When a client receives one of these status codes, it should automatically redirected to the new location indicated by the origin server.

All HTTP status codes by categories

Informational responses.

(100 – 199)

100 Continue

101 Switching protocols

102 Processing

103 Early Hints

Successful responses

(200 – 299)

201 Created

202 Accepted

203 Non-Authoritative Information

204 No Content

205 Reset Content

206 Partial Content

207 Multi-Status

208 Already Reported

226 IM Used

Redirection messages

(300 – 399)

300 Multiple Choices

301 Moved Permanently

302 Found (Previously “Moved Temporarily”)

303 See Other

304 Not Modified

305 Use Proxy

306 Switch Proxy

307 Temporary Redirect

308 Permanent Redirect

Client error responses

(400 – 499)

400 Bad Request

401 Unauthorized

402 Payment Required

403 Forbidden

404 Not Found

405 Method Not Allowed

406 Not Acceptable

407 Proxy Authentication Required

408 Request Timeout

409 Conflict

411 Length Required

412 Precondition Failed

413 Payload Too Large

414 URI Too Long

415 Unsupported Media Type

416 Range Not Satisfiable

417 Expectation Failed

418 I’m a Teapot

421 Misdirected Request

422 Unprocessable Entity

424 Failed Dependency

425 Too Early

426 Upgrade Required

428 Precondition Required

429 Too Many Requests

431 Request Header Fields Too Large

451 Unavailable For Legal Reasons

Server error responses

(500 – 599)

500 Internal Server Error

501 Not Implemented

502 Bad Gateway

503 Service Unavailable

504 Gateway Timeout

505 HTTP Version Not Supported

506 Variant Also Negotiates

507 Insufficient Storage

508 Loop Detected

510 Not Extended

511 Network Authentication Required

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Safari kCFErrorDomainCFNetwork Error, Blank Page Fix

Do you see this Safari error message while browsing certain websites on your Mac. If you are getting a blank Safari page displaying the following error message, then this article is for you.

Safari can’t open the page. The error is: “The operation couldn’t be completed.(kCFErrorDomainCFNetwork error 303.)” (kCFErrorDomainCFNetwork:303)

I was in fact having this problem. Whenever I visited archive.org, Safari would not load the site and just displayed this error message. Here is how I resolved this message:

What is kCFErrorDomainCFNetwork error 303?

This is a parsing error. More specifically, the server is giving this error message because of encoding problems. It is probably due to the fact that Safari is saving too much data for that particular web site (for me: archive.org).  You may want to also read a recent article on how you can reset Safari .

How to fix:

Please try each steps until your issue is resolved:

1 -Let’s clean the problematic site’s cookies and data:

• In the Safari app, click Safari and Preferences
• Click the Privacy tab
• Click the Manage Web Site Data button
• A new window will open and you will see a list of websites that stored data.
• Find the affected site (again this was archive.org for me), you can use the Search field to find easily.
• Select the domain
• And click the Remove button
• And click done.

Now try again opening the web site. Do you experience the same problem? If so, continue to the next step.

2 – Start your Mac in Safe Mode .  This is an easy process. Here is how:

Safe Mode will start your Mac in a basic state with only the original software that came with it. Some of the features of your Mac will not be available in Safe Mode. Here is how:

• Turn off your Mac
• Turn on your Mac and immediately after tuning on, press and hold the Shift key
• Keep holding the Shift key until you see the login window
• Release the key and login
• Now your computer is in Safe Mode
• Open Safari and test to see if this problem occurs. If not, exit Safe mode.
• To exit Safe Mode, restart your computer normally without pressing the Shift key. You could not start your Mac normally, read this article ?

Did the tips above help you? Please leave a comment.

Dr. Serhat Kurt worked as a Senior Technology Director specializing in Apple solutions for small and medium-sized educational institutions. He holds a doctoral degree (or doctorate) from the University of Illinois at Urbana / Champaign and a master’s degree from Purdue University. He is a former faculty member. Here is his LinkedIn profile and Google Scholar profile . Email Serhat Kurt .

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16 Comments

HI. this worked for me, thank you very much for taking the time to explain this.

#1 worked. Thank you!

#1 didn’t work and I still get there error in Safe Mode, help!!!

I am having this problem with the images on the local html after upgrade to Big Sur. Disaster. Apple is stealing our time resolving things, which were just fine before.

WOW thank you! Easy fix!!

Thank you, problem fixed.

Got there in the end! very useful tip. At first I took your example too literally (‘archive.org’) as it sounded like the kind of background site that stored useless data and bloated my computer. I did happen to have ‘archive.org’ listed so deleted that but it didn’t clear the problem. The thing to know here is that whatever site you could not reach (whatever site gave you the ‘KCFErrordomain’ message) – THAT’s the one to delete from the ‘manage data’ list.

Tip 1: excellent! Many, many thanks!

Fix 1 WORKED BIG THANKS

My website worked fine in safe mode but will not work regularly. I keep getting This Connection is not private and won’t move past this how do I fix this

Fix 1 worked, thank-you!!!

These steps worked for me, but a caveat. I used the search function to find the affected site, the digital loans section of my library website, and found one entry that looked like the culprit. What I did not realize was that there were two more sites I needed to clear, that didn’t show up with my search. I went back and searched for several key words and found two more sites to clear. Once I found those and removed them, problem solved. So if at first you don’t succeed, look through your whole list of websites if need be, or search on several key words.

what other sites did you need to remove?

Please let us know what the other keywords were!

#1 worked perfect – thank you!!

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Dec 14, 2017 6:00:13 PM | 303 See Other: What It Is and How to Fix It

A deep dive into the 303 See Other response code, including troubleshooting tips to help you resolve this error in your own application.

A 303 See Other message is an HTTP response status code indicating that the requested resource can be found at another URI (address) by using the GET HTTP method. The 303 See Other code is typically provided in response to a POST , PUT , or DELETE HTTP method request, which indicates to the client that the server successfully received the data associated with the request, and the client should send a new GET request to the new URI it was provided by the server.

There are dozens of possible HTTP status codes used to represent the complex relationship between the client, a web application, a web server, and the multitude of third-party web services that may be in use, so determining the cause of a particular HTTP response status code can be challenging. Since there are so many different codes, each of which represents a completely different status or event, it can be difficult to differentiate between many of them and determine the exact cause of such errors, like the 303 See Other response code.

Throughout this article we'll explore the 303 See Other code by looking at a handful of troubleshooting tips. We'll also examine a few potential, easy to implement fixes for common problems that could be causing 303 codes to appear in your own web application. Let the games begin!

The Problem is Server-Side

All HTTP response status codes within the 3xx category are considered redirection messages . These codes indicate to the user agent (i.e. your web browser) that an additional action is required in order to complete the request and access the desired resource. The 3xx response code category is distinctly different from the 5xx codes category, which encompasses server error messages. For example, the 504 Gateway Timeout error we looked at in a recent article indicates that the server is experiencing issues (in this case, a server acting as a gateway is down or failed to respond in time). Thus, while a 5xx category code indicates an actual problem has occurred on the server, a 3xx category code, such as 303 See Other , is rarely indicative of an actual problem -- it merely occurs due to the server's behavior or configuration, but is not exhibitive of an error or bug on the server.

That said, the appearance of a 303 See Other is usually not something that requires much user intervention. All modern browsers will automatically detect the 303 See Other response code and process the redirection action to the new URI automatically. The server sending a 303 code will also include a special Location header as part of the response it sends to the client. This Location header indicates the new URI where the requested resource can be found. For example, if an HTTP POST method request is sent by the client as an attempt to logic at the URL https://airbrake.io , the web server may be configured to redirect this POST request to a different URI , such as https://airbrake.io/login . In this scenario the server may respond with a 303 See Other code and include the Location: https://airbrake.io/login header in the response. This informs the user agent (browser) that the POST request data (login info) was received by the server, but the server does not believe the requested resource ( https://airbrake.io ) is representative of what the client is requesting. Instead, the server is indicating -- via the 303 response -- that a more representative resource can be found at the Location header URI of https://airbrake.io/login .

As put explicitly by the RFC7231 specification document , which details HTTP/1.1 semantics and content rules: "A 303 response to a GET request indicates that the origin server does not have a representation of the target resource that can be transferred by the server over HTTP. However, the Location field value refers to a resource that is descriptive of the target resource, such that making a retrieval request on that other resource might result in a representation that is useful to recipients without implying that it represents the original target resource." In the example above, the server believes that https://airbrake.io/login would likely provide a resource that the user agent truly wants to receive, so it issues a 303 See Other response code with that information.

Another common use of the 303 See Other code is as a means of identifying real-world objects. For example, imagine the URI https://library.org/book/paperback/the-grapes-of-wrath represents a physical paperback copy of The Grapes of Wrath book by John Steinbeck. Since the server is merely transferring digital bits, it cannot literally respond with a physical paperback copy of The Grapes of Wrath . Thus, using the Semantic Web framework we're illustrating here it would be incorrect for the server to respond to a GET request to the URI above with a typical 200 OK response code. Instead, the server would opt to respond with a 303 See Other code, with a redirect Location header of a more appropriate URI , such as https://library.org/book/digital/the-grapes-of-wrath , which would provide a digital representation of the book to the client.

It's also important to distinguish the purpose and use-cases of the 303 See Other response code from many seemingly similar 3xx codes, such as the 302 Found code we looked at a few weeks ago. Specifically, the 303 Found code informs the client that the passed Location URI is only a temporary resource, and that all future requests should continue to access the originally requested URI . On the other hand, the 303 See Other message is not temporary, and indicates that passed Location URI should be used for future (identical) requests.

Additionally, since the 303 See Other indicates that something has gone wrong within the server of your application, we can largely disregard the client side of things. If you're trying to diagnose an issue with your own application, you can immediately ignore most client-side code and components, such as HTML, cascading style sheets (CSS), client-side JavaScript, and so forth. This doesn't apply solely to web sites, either. Many smart phone apps that have a modern looking user interface are actually powered by a normal web application behind the scenes; one that is simply hidden from the user. If you're using such an application and a 303 See Other occurs, the issue isn't going to be related to the app installed on your phone or local testing device. Instead, it will be something on the server-side, which is performing most of the logic and processing behind the scenes, outside the purview of the local interface presented to the user.

If your application is generating unexpected 303 See Other response codes there are a number of steps you can take to diagnose the problem.

Start With a Thorough Application Backup

As with anything, it's better to have played it safe at the start than to screw something up and come to regret it later on down the road. As such, it is critical that you perform a full backup of your application, database, and so forth, before attempting any fixes or changes to the system. Even better, if you have the capability, create a complete copy of the application onto a secondary staging server that isn't "live," or isn't otherwise active and available to the public. This will give you a clean testing ground with which to test all potential fixes to resolve the issue, without threatening the security or sanctity of your live application.

Diagnosing a 303 See Other Response Code

A 303 See Other response code indicates that the requested resource can better be accessed via the newly-provided URI . However, it's entirely possible that the server is misconfigured, which could cause it to improperly respond with 303 See Other codes, instead of the standard and expected 200 OK code of a normal, functional request. Thus, a large part of diagnosing the issue will be going through the process of double-checking what resources/URLs are generating 303 See Other response codes and determining if these codes are appropriate or not.

If your application is responding with 303 See Other codes that it should not be issuing, this is an issue that many other visitors may be experiencing as well, dramatically hindering your application's ability to service users. We'll go over some troubleshooting tips and tricks to help you try to resolve this issue. If nothing here works, don't forget that Google is your friend. Try searching for specific terms related to your issue, such as the name of your application's CMS or web server software, along with 303 See Other . Chances are you'll find others who have experienced this issue and have found a solution.

Troubleshooting on the Server-Side

Here are some additional tips to help you troubleshoot what might be causing the 303 See Other to appear on the server-side of things:

Confirm Your Server Configuration

Your application is likely running on a server that is using one of the two most popular web server softwares, Apache or nginx . At the time of publication, both of these web servers make up over 84% of the world's web server software ! Thus, one of the first steps you can take to determine what might be causing these 303 See Other response codes is to check the configuration files for your web server software for unintentional redirect instructions.

To determine which web server your application is using you'll want to look for a key file. If your web server is Apache then look for an .htaccess file within the root directory of your website file system. For example, if your application is on a shared host you'll likely have a username associated with the hosting account. In such a case, the application root directory is typically found at the path of /home/<username>/public_html/ , so the .htaccess file would be at /home/<username>/public_html/.htaccess .

If you located the .htaccess file then open it in a text editor and look for lines that use RewriteXXX directives, which are part of the mod_rewrite module in Apache. Covering exactly how these rules work is well beyond the scope of this article, however, the basic concept is that a RewriteCond directive defines a text-based pattern that will be matched against entered URLs. If a matching URL is requested by a visitor to the site, the RewriteRule directive that follows one or more RewriteCond directives is used to perform the actual redirection of the request to the appropriate URL.

For example, here is a simple RewriteCond and RewriteRule combination that matches all incoming requests to airbrake.io using the HTTP POST method, and redirecting them to https://airbrake.io/login via a 303 See Other response:

Notice the extra flag at the end of the RewriteRule , which explicitly states that the response code should be 303 , indicating to user agents that this redirect is a better representation of the request resource. Thus, if you find any strange RewriteCond or RewriteRule directives in the .htaccess file that don't seem to belong, try temporarily commenting them out (using the # character prefix) and restarting your web server to see if this resolves the issue.

On the other hand, if your server is running on nginx , you'll need to look for a completely different configuration file. By default this file is named nginx.conf and is located in one of a few common directories: /usr/local/nginx/conf , /etc/nginx , or /usr/local/etc/nginx . Once located, open nginx.conf in a text editor and look for return or rewrite directives that are using the 303 response code flag. For example, here is a simple block directive (i.e. a named set of directives) that configures a virtual server by creating a redirection from airbrake.io to airbrake.io/login for HTTP POST method requests:

Return directives in nginx are similar to the RewriteCond and RewriteRule directives found in Apache , as they tend to contain more complex text-based patterns for searching. Either way, look through your nginx.conf file for any abnormal return or rewrite directives that include the 303 flag. Comment out any abnormalities before restarting the server to see if the issue was resolved.

Scour the Logs

Nearly every web application will keep some form of server-side logs. Application logs are typically the history of what the application did, such as which pages were requested, which servers it connected to, which database results it provides, and so forth. Server logs are related to the actual hardware that is running the application, and will often provide details about the health and status of all connected services, or even just the server itself. Google "logs [PLATFORM_NAME]" if you're using a CMS, or "logs [PROGRAMMING_LANGUAGE]" and "logs [OPERATING_SYSTEM]" if you're running a custom application, to get more information on finding the logs in question.

Debug Your Application Code

If all else fails, it may be that a problem in some custom code within your application is causing the issue. Try to diagnose where the issue may be coming from through manually debugging your application, along with parsing through application and server logs. Ideally, make a copy of the entire application to a local development machine and perform a step-by-step debug process, which will allow you to recreate the exact scenario in which the 303 See Other occurred and view the application code at the moment something goes wrong.

No matter what the cause, the appearance of a 303 See Other within your own web application is a strong indication that you may need an error management tool to help you automatically detect such errors in the future. The best of these tools can even alert you and your team immediately when an error occurs. Airbrake's error monitoring software provides real-time error monitoring and automatic exception reporting for all your development projects. Airbrake's state of the art web dashboard ensures you receive round-the-clock status updates on your application's health and error rates. No matter what you're working on, Airbrake easily integrates with all the most popular languages and frameworks. Plus, Airbrake makes it easy to customize exception parameters, while giving you complete control of the active error filter system, so you only gather the errors that matter most.

Check out Airbrake's error monitoring software today and see for yourself why so many of the world's best engineering teams use Airbrake to revolutionize their exception handling practices!

Written By: Frances Banks

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Error: Code 303 - Thread kCFErrorDomainCFNetwork error 303.

How to fix the runtime code 303 safari error 303, error information.

This repair tool can fix common computer errors like BSODs, system freezes and crashes. It can replace missing operating system files and DLLs, remove malware and fix the damage caused by it, as well as optimize your PC for maximum performance.

About Runtime Code 303

Runtime Code 303 happens when Safari fails or crashes whilst it's running , hence its name. It doesn't necessarily mean that the code was corrupt in some way, but just that it did not work during its run-time. This kind of error will appear as an annoying notification on your screen unless handled and corrected. Here are symptoms, causes and ways to troubleshoot the problem.

Definitions (Beta)

Here we list some definitions for the words contained in your error, in an attempt to help you understand your problem. This is a work in progress, so sometimes we might define the word incorrectly, so feel free to skip this section!

• Safari - Safari is Apple's web browser, the default browser on Mac OS X and iOS.
• Thread - Multi-threading is the ability of a computer or a program to perform work concurrently or asynchronously by utilizing multiple concurrent streams of execution generally referred to as threads.

Symptoms of Code 303 - Safari Error 303

Runtime errors happen without warning. The error message can come up the screen anytime Safari is run. In fact, the error message or some other dialogue box can come up again and again if not addressed early on.

There may be instances of files deletion or new files appearing. Though this symptom is largely due to virus infection, it can be attributed as a symptom for runtime error, as virus infection is one of the causes for runtime error. User may also experience a sudden drop in internet connection speed, yet again, this is not always the case.

Causes of Safari Error 303 - Code 303

During software design, programmers code anticipating the occurrence of errors. However, there are no perfect designs, as errors can be expected even with the best program design. Glitches can happen during runtime if a certain error is not experienced and addressed during design and testing.

Runtime errors are generally caused by incompatible programs running at the same time. It may also occur because of memory problem, a bad graphics driver or virus infection. Whatever the case may be, the problem must be resolved immediately to avoid further problems. Here are ways to remedy the error.

Repair Methods

Runtime errors may be annoying and persistent, but it is not totally hopeless, repairs are available. Here are ways to do it.

If a repair method works for you, please click the upvote button to the left of the answer , this will let other users know which repair method is currently working the best.

Please note: Neither ErrorVault.com nor it's writers claim responsibility for the results of the actions taken from employing any of the repair methods listed on this page - you complete these steps at your own risk.

Method 1 - Close Conflicting Programs

• Open Task Manager by clicking Ctrl-Alt-Del at the same time. This will let you see the list of programs currently running.
• Go to the Processes tab and stop the programs one by one by highlighting each program and clicking the End Process buttom.
• You will need to observe if the error message will reoccur each time you stop a process.
• Once you get to identify which program is causing the error, you may go ahead with the next troubleshooting step, reinstalling the application.

Method 2 - Update / Reinstall Conflicting Programs

• For Windows 7, click the Start Button, then click Control panel, then Uninstall a program
• For Windows 8, click the Start Button, then scroll down and click More Settings, then click Control panel > Uninstall a program.
• For Windows 10, just type Control Panel on the search box and click the result, then click Uninstall a program
• Once inside Programs and Features, click the problem program and click Update or Uninstall.
• If you chose to update, then you will just need to follow the prompt to complete the process, however if you chose to Uninstall, you will follow the prompt to uninstall and then re-download or use the application's installation disk to reinstall the program.
• For Windows 7, you may find the list of all installed programs when you click Start and scroll your mouse over the list that appear on the tab. You may see on that list utility for uninstalling the program. You may go ahead and uninstall using utilities available in this tab.
• For Windows 10, you may click Start, then Settings, then choose Apps.
• Scroll down to see the list of Apps and features installed in your computer.
• Click the Program which is causing the runtime error, then you may choose to uninstall or click Advanced options to reset the application.

Method 3 - Update your Virus protection program or download and install the latest Windows Update

Method 4 - re-install runtime libraries.

• Uninstall the package by going to Programs and Features, find and highlight the Microsoft Visual C++ Redistributable Package.
• Click Uninstall on top of the list, and when it is done, reboot your computer.
• Download the latest redistributable package from Microsoft then install it.

Method 5 - Run Disk Cleanup

• You should consider backing up your files and freeing up space on your hard drive
• You can also clear your cache and reboot your computer
• You can also run Disk Cleanup, open your explorer window and right click your main directory (this is usually C: )
• Click Properties and then click Disk Cleanup

Method 6 - Reinstall Your Graphics Driver

• Open your Device Manager, locate the graphics driver
• Right click the video card driver then click uninstall, then restart your computer

Method 7 - IE related Runtime Error

• Reset your browser.
• For Windows 7, you may click Start, go to Control Panel, then click Internet Options on the left side. Then you can click Advanced tab then click the Reset button.
• For Windows 8 and 10, you may click search and type Internet Options, then go to Advanced tab and click Reset.
• Disable script debugging and error notifications.
• On the same Internet Options window, you may go to Advanced tab and look for Disable script debugging
• Put a check mark on the radio button
• At the same time, uncheck the "Display a Notification about every Script Error" item and then click Apply and OK, then reboot your computer.

Speed Up Tip #25

Microsoft & Windows® logos are registered trademarks of Microsoft. Disclaimer: ErrorVault.com is not affiliated with Microsoft, nor does it claim such affiliation. This page may contain definitions from https://stackoverflow.com/tags under the CC-BY-SA license. The information on this page is provided for informational purposes only. © Copyright 2018

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How to Resolve the HTTP 303 Status Code: What is It & SEO Impact

Tired of Tedious Linking? Linkilo Ends the Struggle.

The HTTP 303 Status Code is more than just a temporary glitch in your system—it’s a redirection signal that can lead to complex challenges. If you’ve ever faced this issue, you know how perplexing it can be. This guide aims to equip you with a clear understanding of what the HTTP 303 Status Code entails, why it occurs, and how to handle it effectively.

HTTP 303 Status Code: What Exactly Is It?

The HTTP 303 Status Code, unlike other standard codes like 404 (Not Found) or 200 (OK), specifically tells the client that the response to the request can be found at a different URL. This temporary redirection might lead to problems such as:

• Infinite loops : A user might be redirected to the original URL endlessly.
• Caching complications : Some proxies might not cache resources associated with a 303 code, leading to inefficiency.
• Increased bandwidth consumption : Inefficient caching of 303 resources can strain your server.

This code is unique in its behavior, affecting various aspects of the user experience.

Why Does the HTTP 303 Status Code Occur?

The causes of the HTTP 303 Status Code can be broad but typically fall into the following categories:

• Relocation of web content : For example, if a blog post is moved to a different URL.
• Changes in accessibility : Perhaps a web page is no longer public.
• Server misconfiguration : Such as incorrect settings in Apache or Nginx.
• Coding errors within your application : Mistakes in custom code might trigger this status code.

Each of these causes requires a different approach to resolution.

Strategies to Address the HTTP 303 Status Code

If you encounter the HTTP 303 Status Code, it’s essential to understand that each situation might require a distinct solution. Here are three comprehensive strategies to help you address the issue:

1. Review Your Server Configuration

Different server types like Nginx or Apache have unique configurations that might lead to a 303 status code. Suppose you changed the URL structure of a blog. In that case, lines in the .htaccess file with directives such as [R=303] might cause unexpected redirections. Commenting out these lines and restarting the server can provide a remedy.

2. Scrutinize Your Server Logs

Server logs are treasure troves of information. By analyzing files like error.log or access.log, you can identify patterns that might hint at the root cause. For example, repeated 303 codes in the error log may trace back to a misconfigured plugin or module.

3. Debug Your Application

If a newly installed WordPress plugin is causing the issue, tools like WP Debugging or direct edits to wp-config.php can help diagnose the problem. A review of the debug.log might reveal a conflict between the plugin and your current theme, guiding you to an effective solution.

SEO Impact of HTTP 303 Status Code

You might wonder whether the 303 Status Code could harm your SEO. While the code does indicate a temporary redirection, its impact on search engine rankings is typically minimal. For example, if you’ve moved a product page to a new category on an e-commerce site, using a 303 code to redirect users won’t generally affect your site’s SEO performance.

The HTTP 303 Status Code might seem like a daunting challenge, but with the right insights and targeted strategies, it’s something you can navigate with confidence. By understanding its unique behavior, identifying the root causes, and applying the appropriate solutions, you can ensure a smooth user experience on your site.

Remember, a quality web host can be an invaluable ally in this process, offering expert support and guidance whenever these challenges arise. Whether it’s reviewing server configurations, examining logs, or debugging applications, this guide offers a pathway to understanding and overcoming the HTTP 303 Status Code effectively.

About the Author: Jay - Linkilo

An entrepreneur and SEO expert, is the driving force behind innovative platforms like linkilo.co, productreview.tools and more. Committed to empowering marketers, Jay continues to make a positive impact in the digital marketing space.

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