I am testing a backend SOAP API with Ionic and I am getting CORS problems.
The app is launched with ionic serve that has http://localhost:8100 origin
I enabled the MOESIF CORS and ORIGIN extension with this configuration:
When I do a GET request to
http://host/WebService1.asmx?WSDL
It works fine but when I do a POST request to
http://host/WebService1.asmx
With a xml body it returns this error.
Access to XMLHttpRequest at 'http://host/WebService1.asmx' from origin
'http://localhost:8100' has been blocked by CORS policy: Response to
preflight request doesn't pass access control check: No
'Access-Control-Allow-Origin' header is present on the requested
resource.
I have tried whith Safari with the security disabled and works all fine but I need to work with Chrome
What would be doing wrong?
Related
When I use chrome version 78, I can pass the custom header key-value to the backend normally, but when I upgrade the kernel to the latest chrome version 87, I get an error when I access the backend java api interface again and it says "No 'Access-Control-Allow-Origin' header is present on the requested resource. Origin' header is present on the requested resource."
What am I doing wrong?
vue : 2.6.11
axios: 0.19.2
This is a server-side problem. You should contact the server manager and ask him to add Access-Control-Allow-Origin header in the responses or do it yourself if server is in your hands).
I solved the chrome 85+ security policy problem, by:
Set up a reverse proxy through vue proxy to trick the browser.
I'm trying to figure out how to get web torrent to play a video, but I'm getting some weird errors. Here is a pastebin: https://pastebin.com/raw/3wp5F8Fh
And here is a live version: https://41182065-e8d9-40b1-8dd9-9433b402bce9.htmlpasta.com/
When we go to the chrome console, we get this:
Mixed Content: The page at 'https://41182065-e8d9-40b1-8dd9-9433b402bce9.htmlpasta.com/' was loaded over HTTPS, but requested an insecure script 'http://momentjs.com/downloads/moment.min.js'. This request has been blocked; the content must be served over HTTPS.
/favicon.ico:1 Failed to load resource: the server responded with a status of 404 ()
(index):1 Access to XMLHttpRequest at 'https://nyaa.si/download/941788.torrent' from origin 'https://41182065-e8d9-40b1-8dd9-9433b402bce9.htmlpasta.com' has been blocked by CORS policy: No 'Access-Control-Allow-Origin' header is present on the requested resource.
webtorrent.min.js:4 Uncaught Error: Error downloading torrent: XHR error
at webtorrent.min.js:5
at t.exports.<anonymous> (webtorrent.min.js:7)
at t.exports.t (webtorrent.min.js:5)
at t.exports.r.emit (webtorrent.min.js:4)
at XMLHttpRequest.c.onerror (webtorrent.min.js:7)
The explanation is in the error message, but in short: your browser has blocked the request because you're using AJAX to communicate with a remote server and that server isn't sending the appropriate 'Access-Control-Allow-Origin' header.
The reason such requests are blocked is to protect you from malicious scripts - if you're logged in to website A and have access to some private data, then website B shouldn't be able to trigger an AJAX request to access that data unless A trusts B.
The general term for this kind of access is 'Cross Origin Resource Sharing' or 'CORS' - for more information, Mozilla have a nice summary here: https://developer.mozilla.org/en-US/docs/Web/HTTP/CORS
If you have control of the remote server then responding with the appropriate header will allow the request to go through (although note that some browsers such as Safari will still block cookies from the remote server because this technique can be used for tracking).
The following has been seen in Chrome's console (anonymized domains, boldface has been added):
> somesite.ourdomain.org:44301/api/v1.0/AppCache/AdministrationStatusApi:1 GET https://devesaapi.abim.org:44301/api/v1.0/AppCache/AdministrationStatusApi 503 (Service Unavailable)
> esa:1 Access to XMLHttpRequest at 'https://somesite.ourdomain.org:44301/api/v1.0/AppCache/AdministrationStatusApi' from origin 'https://othersite.ourdomain.org:44301' has been blocked by CORS policy: No 'Access-Control-Allow-Origin' header is present on the requested resource
The true reason for the 503 is that one of the load-balanced nodes was not responding correctly to the load balancer. However, Chrome decided that since the 503 response didn't have an Access-Control-Allow-Origin header on this cross-site request, it should complain about CORS.
The reason this is bad is because it misled our developers and wasted some time hunting down a CORS problem that wasn't really there.
Is Chrome really doing the right thing by reporting that this request, which returned 503, is a CORS violation?? What do other browsers do?
Google Chrome stable Version 72.0.3626.109 (Official Build) (64-bit) on Windows 10
EDIT: At least one other developer blogger agrees with me.
When i tried to import babylon file, i received the error Access to XMLHttpRequest at 'myfilepath' from origin 'null' has been blocked by CORS policy:
I have no idea on CORS, and please help me by briefing it to the beginner level.
1)Access to XMLHttpRequest at 'file:///C:/Users/AJDA/Documents/Palatisation/web%20files/box.babylon' from origin 'null' has been blocked by CORS policy: Cross origin requests are only supported for protocol schemes: http, data, chrome, chrome-extension, https.
2)BJS - [17:27:13]: Unable to import meshes from box.babylon: importMesh of undefined from undefined version: undefined, exporter version: undefinedimportMesh has failed JSON parse
m._ErrorEnabled # babylon.js:1
Hello this is unfortunate but this is a security constraint enforced by browsers. Files can only be served from a webserver (like apache, IIS, etc...) from your localhost
On OS X I have a simple html page which I open using a file:///... url. This page contains javascript which attempts to load a http://... resource.
This works using Safari, but it doesn't work under Firefox or Chrome.
The error message I get from those browsers are:
Cross-Origin Request Blocked: The Same Origin Policy disallows reading the remote resource at http://whatever/etc. (Reason: CORS header 'Access-Control-Allow-Origin' missing).
Is there to get the page to work under Firefox and Chrome?