You can use networkingThe Unity system that enables multiplayer gaming across a computer network. More info
See in Glossary in Web in the following ways:
Unity supports the UnityWebRequest class in Web. To implement the UnityWebRequest class, Unity uses the JavaScript Fetch API, which uses the browser to handle web requests. This imposes security restrictions on accessing cross-domain resources.
If you send a web request to a server other than the one that hosts the Unity content, the server you’re sending it to must authorize the Unity content.
To access cross-domain web resources in Web, the server you are trying to access needs to use cross-origin resource sharing (CORS) to authorize cross-domain web resources.
If you try to access content using UnityWebRequest, and the remote server doesn’t have CORS set up or configured correctly, an error like the following appears in the browser console:
Cross-Origin Request Blocked: The Same Origin Policy disallows reading the remote resource at http://myserver.com/. This can be fixed by moving the resource to the same domain or enabling CORS.
The server needs to add Access-Control headers to the http responses it sends out, to indicate which web pages have permission to read that information from a web browser.
For a demonstration of how to add Access-Control headers that allow Unity Web to access resources on a web server from any origin, refer to the following example. This example includes common request headers and allows the GET, POST or OPTIONS methods:
"Access-Control-Allow-Credentials": "true",
"Access-Control-Allow-Headers": "Accept, X-Access-Token, X-Application-Name, X-Request-Sent-Time",
"Access-Control-Allow-Methods": "GET, POST, OPTIONS",
"Access-Control-Allow-Origin": "*",
Don’t use code that blocks a UnityWebRequest download, such as this:
while(!www.isDone) {}
Web browsers do not allow synchronously blocking code execution to wait for a network transfer. Therefore, if you need to perform a synchronous style UnityWebRequest, use a Coroutine and a yield statement to wait for the download to finish. For more information, see Examples of coroutines using UnityWebRequest.
Due to security restrictions, web browsers do not allow direct access to TCP or UDP sockets. Instead, you can use the Unity Netcode networking package, which supports Web platform. For more information, refer to the documentation About Netcode for GameObjects (Unity Multiplayer Networking).
For more information on web browser networking standards, you might want to explore the following:
There are a few networking features that Web platform doesn’t support.
You can’t use any .NET networking classes within the Web platform because JavaScript code doesn’t have direct access to internet protocol (IP) sockets to implement network connectivity. Specifically, Web doesn’t support any .NET classes within the System.Net
namespace.
Web platform does not support native socket access because of security limitations within browsers. Therefore, Web also doesn’t support features like UnityEngine.Ping (ICMP).
Did you find this page useful? Please give it a rating:
Thanks for rating this page!
What kind of problem would you like to report?
Thanks for letting us know! This page has been marked for review based on your feedback.
If you have time, you can provide more information to help us fix the problem faster.
Provide more information
You've told us this page needs code samples. If you'd like to help us further, you could provide a code sample, or tell us about what kind of code sample you'd like to see:
You've told us there are code samples on this page which don't work. If you know how to fix it, or have something better we could use instead, please let us know:
You've told us there is information missing from this page. Please tell us more about what's missing:
You've told us there is incorrect information on this page. If you know what we should change to make it correct, please tell us:
You've told us this page has unclear or confusing information. Please tell us more about what you found unclear or confusing, or let us know how we could make it clearer:
You've told us there is a spelling or grammar error on this page. Please tell us what's wrong:
You've told us this page has a problem. Please tell us more about what's wrong:
Thank you for helping to make the Unity documentation better!
Your feedback has been submitted as a ticket for our documentation team to review.
We are not able to reply to every ticket submitted.
When you visit any website, it may store or retrieve information on your browser, mostly in the form of cookies. This information might be about you, your preferences or your device and is mostly used to make the site work as you expect it to. The information does not usually directly identify you, but it can give you a more personalized web experience. Because we respect your right to privacy, you can choose not to allow some types of cookies. Click on the different category headings to find out more and change our default settings. However, blocking some types of cookies may impact your experience of the site and the services we are able to offer.
More information
These cookies enable the website to provide enhanced functionality and personalisation. They may be set by us or by third party providers whose services we have added to our pages. If you do not allow these cookies then some or all of these services may not function properly.
These cookies allow us to count visits and traffic sources so we can measure and improve the performance of our site. They help us to know which pages are the most and least popular and see how visitors move around the site. All information these cookies collect is aggregated and therefore anonymous. If you do not allow these cookies we will not know when you have visited our site, and will not be able to monitor its performance.
These cookies may be set through our site by our advertising partners. They may be used by those companies to build a profile of your interests and show you relevant adverts on other sites. They do not store directly personal information, but are based on uniquely identifying your browser and internet device. If you do not allow these cookies, you will experience less targeted advertising. Some 3rd party video providers do not allow video views without targeting cookies. If you are experiencing difficulty viewing a video, you will need to set your cookie preferences for targeting to yes if you wish to view videos from these providers. Unity does not control this.
These cookies are necessary for the website to function and cannot be switched off in our systems. They are usually only set in response to actions made by you which amount to a request for services, such as setting your privacy preferences, logging in or filling in forms. You can set your browser to block or alert you about these cookies, but some parts of the site will not then work. These cookies do not store any personally identifiable information.