Chrome allow cross origin requests for local files

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Stack Overflow for Teams is a private, secure spot for you and your coworkers to find and share information. I'm trying to build an html file to monitor some things on a remote site- specifically, github. I'd like to be able to keep it to just that flat file, making the requests straight from the JS to github's API. My thought process went like this:. So, any suggestions as to how to successfully authenticate to this api from a single, local html file- either as a way around the above tacts, or another idea entirely?

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Asked 8 years, 5 months ago. Active 8 years, 5 months ago. Viewed 5k times. My thought process went like this: Let's use jsonp, since I only need read access, so sticking with GETs should be fine. That fails because you can't do basic authentication with jsonp.

Ok, I'll use Github's OAuth instead of basic authentication! Ok, I'll load Github's oauth in an iFrame, then get the resulting url which should contain the oauth code I need. Fishtoaster Fishtoaster 1, 2 2 gold badges 17 17 silver badges 30 30 bronze badges.

Active Oldest Votes. If you are using google chrome you could try running it with the --allow-file-access-from-files switch enabled. Esailija Esailija k 22 22 gold badges silver badges bronze badges. Alnitak, is running a web server on your computer an option? Yeah, running a web server is the last option, after checking stack overflow. Sign up or log in Sign up using Google.

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Socializing with co-workers while social distancing. Podcast Programming tutorials can be a real drag. Featured on Meta. Community and Moderator guidelines for escalating issues via new response….This is allowed because of the Chrome extension permission model which requires a user installing an extension to agree to that the installed application may access your data on the domain in question. However, by default, the extension only has this capability when the extension is installed and activated say by clicking on the app icon on the chrome toolbar.

It turns out, you can start Chrome with a couple of flags that will allow you to simply browse to your files directly and execute cross-domain XMLHttpRequest calls. Your shortcut should look something like this:. Together, both of these flags will allow a developer to test cross-domain ajax requests from a local file.

chrome allow cross origin requests for local files

Josh is a software engineer, leader, startup advisor for the LA Chamber of Commerce and consultant residing in the Los Angeles area. Josh is passionate about helping entrepreneurs and businesses reach their maximum potential.

View all posts by Josh McGinnis. Solution: [pseudocode] if box. It is fairly easy to enable cross-origin requests in […]. This site uses Akismet to reduce spam.

Learn how your comment data is processed. Skip to content. Previous Article Previous Article: Dynamic robots. Joshua McGinnis December 26, at pm Reply. Erwin Vedar March 7, at am Reply. Firestryke31 April 18, at pm Reply. Hey dude, just drop by to say thank you for the trick. Kevin Mack August 16, at pm Reply.

Enabling Cross Origin Requests for a RESTful Web Service - Spring Boot

Post a Comment Cancel Reply.Regular web pages can use the XMLHttpRequest object to send and receive data from remote servers, but they're limited by the same origin policy. Content scripts initiate requests on behalf of the web origin that the content script has been injected into and therefore content scripts are also subject to the same origin policy. Extension origins aren't so limited - a script executing in an extension's background page or foreground tab can talk to remote servers outside of its origin, as long as the extension requests cross-origin permissions.

Each running extension exists within its own separate security origin. Without requesting additional privileges, the extension can use XMLHttpRequest to get resources within its installation. For example, if an extension contains a JSON configuration file called config. By adding hosts or host match patterns or both to the permissions section of the manifest file, the extension can request access to remote servers outside of its origin.

Note that here, match patterns are similar to content script match patternsbut any path information following the host is ignored. Also note that access is granted both by host and by scheme. If an extension wants both secure and non-secure HTTP access to a given host or set of hosts, it must declare the permissions separately:. When using resources retrieved via XMLHttpRequest, your background page should be careful not to fall victim to cross-site scripting.

Specifically, avoid using dangerous APIs such as the below:.

chrome allow cross origin requests for local files

When performing cross-origin requests on behalf of a content script, be careful to guard against malicious web pages that might try to impersonate a content script. In particular, do not allow content scripts to request an arbitrary URL. Consider an example where an extension performs a cross-origin request to let a content script discover the price of an item. One insecure approach would be to have the content script specify the exact resource to be fetched by the background page.

In the approach above, the content script can ask the extension to fetch any URL that the extension has access to. A malicious web page may be able to forge such messages and trick the extension into giving access to cross-origin resources.

Instead, design message handlers that limit the resources that can be fetched. Below, only the itemId is provided by the content script, and not the full URL.

chrome allow cross origin requests for local files

Additionally, be especially careful of resources retrieved via HTTP. If your extension is used on a hostile network, an network attacker aka a "man-in-the-middle" could modify the response and, potentially, attack your extension. While the default policy doesn't restrict connections to hosts, be careful when explicitly adding either the connect-src or default-src directives. What Can You Publish?

Extension origin Each running extension exists within its own separate security origin. Requesting cross-origin permissions By adding hosts or host match patterns or both to the permissions section of the manifest file, the extension can request access to remote servers outside of its origin. Might be evaluating an evil script!

Might be injecting a malicious script!This thread was archived. Please ask a new question if you need help. Reason: CORS request not http. What the heck is this? Why did silly mozila messed up the development of local files? It broke fontawesome functionality! Very stupid! The proposed solution is not ideal in that it requires local HTML files that use local fonts to change their default about:config settings.

Understood, but redefining all local file resources to have a unique origin breaks Mozilla's previous standard:. This seems severe as the other browser vendors are NOT doing that with their origin definitions.

This also makes using browsers for local help very limited. I hope Mozilla will reconsider. Help systems that were taking advantage of the broader functionality in Firefox will need to change. The link I posted describes how it works on other browsers.

How to: Disable Same-Origin Policy in Chrome

For 'file:' resources, origin should be the same for files in the same or child directories as defined in the statement here. Currently, in v68 this breaks many s if not more users accessing local help content using FireFox. User's can switch to another browser and the local resources will work. Is there a place where I can upload an example? Thank you. If copyright permits, sure, or perhaps there is a sample online that could be downloaded for testing.

By the way, I did file a bug yesterday proposing an exception for. Waiting to see whether that is considered feasible. I have this problem too. It wouldn't be so bad if FF would let me keep using v. This change was made to prevent exfiltration of valuable data within reach of a local page, as demonstrated in an available exploit. More info:. There is a bug on file proposing that fonts be an exception, but it will take time to implement.

For now, you can roll back the patch as follows:. Click the button promising to be careful or accepting the risk. To mitigate the vulnerability: If you save pages from untrusted sites in a separate folder, e.

This has broken my scripts that set document properties such as window title and innerHtml because the related files are no longer same-site origin. My use case is generating large folders of html showing simulation results and saving these to disk. A browser is then used to navigate through the files in either online or offline mode.

The html includes a few scripts to aid in navigation. Unfortunately the navigation scripts are now broken. There may be a workaround going forward, but years worth of folders of results can no longer be navigated.This information will be visible to anyone who visits or subscribes to notifications for this post. Are you sure you want to continue? Go to the Legal Help page to request content changes for legal reasons.

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Allow CORS: Access-Control-Allow-Origin

Original Poster - Jared Pellegrini. I started getting CORS errors after upgrading to v I'm developing a web app that makes web service requests via Axios to an endpoint on one of our development servers. The requests are going from my local computer to an internal URL. This had been working fine up until the start of this week.

Since upgrading to v76, I started getting this error:. The service also works without issue when I hit it directly via the browser. I can also confirm that a coworker who is still on v75 is not having this issue, running the same exact code.

Any ideas or help would be appreciated. Community content may not be verified or up-to-date. Learn more. Recommended Answer Recommended Answers 1. Platinum Product Expert the Core. Recommended Answer. Disable the 'out-of-blink-cors' flag by copying and pasting that address into the address bar of Chrome followed by [enter]. In the page that opens you'll see a highlighted so-called 'flag' experiment. Disable it and restart Chrome. New headers are introduced as part of security and those must handled in the code.By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service.

The dark mode beta is finally here. Change your preferences any time. Stack Overflow for Teams is a private, secure spot for you and your coworkers to find and share information. I need to open a local html file in the browser. Is there a way to run ajax from local directory. It is necessary for me that it is run from local file only. For anyone who wants to know, I had to run a server in the app to serve the js files. Seems like it's not possible to do it without running a server. If anyone knows of another way, do tell.

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If you are able to change the server code, you can try adding the string "null" to allowed origins. In Chrome, it sends the origin as "null" if it's running from a local file. Note that this is not recommendedbut might be good enough if you just need it during development.

If you are using chrome, try this extension. It's dead simple to enable, only requiring a single response header to be sent by the server. Read this for more info. Learn more. Cross-origin request for local file Ask Question. Asked 2 years, 11 months ago. Active 2 months ago. Viewed 14k times. User User 1 1 gold badge 4 4 silver badges 9 9 bronze badges. Active Oldest Votes. Here's an example in ASP.

NET Core for setting up the "null" origin: services. WithOrigins "null". Dusklight Dusklight 76 1 1 silver badge 3 3 bronze badges. Master Yushi Master Yushi 6 6 silver badges 17 17 bronze badges. Actually I am using android webview. I can't see, how does it answers the question.Cross origin requests are only supported for protocol schemes: http, data, chrome, chrome-extension, https, chrome-extension-resource.

Can you provide more details about how you execute the test in your environment? I would suggest you follow the demo in the blog below to make another test to see if the issue still exists:. If you want to use the SPServices in a non-SharePoint page, it will require to handle the authentication.

Another similar thread would also be helpful:. TechNet Community Support Please remember to mark the replies as answers if they help, and unmark the answers if they provide no help. If you have feedback for TechNet Support, contact tnmff microsoft. This site uses cookies for analytics, personalized content and ads. By continuing to browse this site, you agree to this use. Learn more. The content you requested has been removed. Ask a question. Quick access.

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chrome allow cross origin requests for local files

Remove From My Forums. Answered by:. SharePoint - Development and Programming. Sign in to vote. SPFilterNode "rs:data". SPFilterNode "z:row".

Wednesday, July 15, AM. Hi, Can you provide more details about how you execute the test in your environment? Thursday, July 16, AM. Help us improve MSDN. Make a suggestion.


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