Questions tagged [cors]
Questions related to Cross-origin resource sharing (CORS) within Salesforce. This error can usually be identified using the browser's developer tools.
102
questions
1
vote
1
answer
204
views
CORS Issue Preventing LWC Component from Accessing Salesforce Apex Controller - No 'Access-Control-Allow-Origin' Header Present
I am working on a Lightning Web Component (LWC) in Salesforce that fetches data from a custom Apex controller. Unfortunately, I am facing a CORS (Cross-Origin Resource Sharing) issue that prevents the ...
- 61
-1
votes
1
answer
285
views
Access to fetch has been blocked by CORS policy - LWC
I'm having the following error once I try to do a POST in an outside link of my Salesforce org,
So, I've already added this URL to the "CSP Trusted Sites" and the "Remote Site ...
0
votes
1
answer
101
views
Lightning out loads but apex calls return cors error
The lightning out(LO) app I have created worked fine. I did not use it however for a few months and now i get a 'Redirect is not allowed for a preflight request' error when my LWC tries to make an ...
- 131
2
votes
1
answer
214
views
Visualforce CORS Error Even When Origin Is Whitelisted, Headers Are Also Set
I'm creating a PDF viewer using Visualforce and the PDF.js library. My project doesn't include react.
When I try to execute pdfjsLib.getDocument() passing the URL of a PDF stored in Salesforce itself, ...
- 95
1
vote
0
answers
99
views
CORS violation by Aura component
friends.
I have some simple aura components that renders a credit card payment form in an iframe.
This component works perfectly fine in production but browser fails with same-origin policy error in ...
- 340
0
votes
0
answers
46
views
i am using einstein dashboard in external website and i am getting error No 'Access-Control-Allow-Origin' header is present on the requested resource
my task to show my einstein dashboard in external website so i used lightning out application but i am getting this error
my code is
app:
<aura:application access="global" extends="...
0
votes
0
answers
70
views
I have a public site and when I am trying to access that site from github it gives me CORS error. Any help on this?
We have a yaml or a json file stored in a static resource as a zip file. We are trying to access it using a VF page and have included the VF page in a public site. We are trying to access the public ...
- 9
0
votes
1
answer
665
views
CORS Issue using Fetch - LWC (PreFlight)
We have a LWC which is being hosted on a VF page using Lightning Out - up until December 2022 it was working without issue but it seems we've run into a CORS issue since then (I assume a Spring ...
- 167
0
votes
0
answers
1k
views
Preflight request doesn´t pass access check : It does not have HTTP OK status
When the customer is trying to connect with Salesforce it get Preflight 400 error.
Without web-security-disable ON it is working as expected, also in Postman it is working as expected but with web-...
- 1
6
votes
1
answer
2k
views
Lightning Out : getting "No 'Access-Control-Allow-Origin' header is present on the requested resource" from Heroku App
---------- THE EXPLANATION ----------
I need to use my LWC's in an External Site. For it I use Lightning Out, and I want to test it with Heroku App.
I have built a simple Aura Application according to ...
- 1,503
0
votes
1
answer
664
views
OAuth 2.0 Web Server Flow and CORS problem
I try to communicate with the API Salesforce.
First, I call the URL: https://login.salesforce.com/services/oauth2/authorize.
It gives me a code in the callback URL I gave on parameters.
Then, I try to ...
- 3,596
1
vote
1
answer
25k
views
Refused to load script because it violates Content Security Policy directive
I'm currently working to include my external js in aura component. So, i have included my external JS as static resource. but i'm getting the below exception.
Refused to load the script '...' because ...
- 1,439
1
vote
0
answers
444
views
Am I calling my DATABASE_URL correctly with Axios? (CORS error with Heroku Postgres..)
I am trying to deploy an app using a combination of NodeJS, Heroku, and the Postgres add-on database. Everything works fine when I deploy locally. When I try to deploy off of Heroku, however, I get ...
- 11
-1
votes
1
answer
679
views
OAuth Error when trying to get Token through JavaScript
I am setting up a connected application and am having trouble generating a bearer token through my JS code. I have it working perfectly through postman, as well as all of my get calls, I use postman ...
- 11
2
votes
1
answer
253
views
Http CORS violation from Customer Digital Experience
As a dutiful admin, I followed up on the email SFDC sent me entitled Reminder: Get Ready to Enforce the CORS Allowlist for Lightning Apps as my PROD org was mentioned as affected
You’re being ...
- 69.9k
1
vote
0
answers
138
views
Popup warning that blob cannot be opened because of browser settings when generating data with Javascript
When generating a CSV file with Javascript, and trying to make the file available for download locally, using the snippet below:
const blobToBase64 = (blob) => {
const reader = new FileReader();...
- 12.8k
0
votes
1
answer
301
views
LWC Component unable to get response from Nager.Date API although response is shown in network tab
I am unable to get the response from Nager.Date API using the follow code:
LWC function:
getData(){
let myurl = 'https://date.nager.at/api/v3/publicholidays/2021/AU';
fetch('https://date.nager....
- 3
2
votes
1
answer
220
views
Why is CORS-Event-Count" event type is not available for selection in the "Event Log File Browser"
Few users might be receiving emails as "Get Ready to Enforce the CORS Allowlist for Lightning Apps" stating that their org has one or more external domains calling on Salesforce resources ...
- 4,977
0
votes
0
answers
2k
views
Origin has been blocked by CORS policy
I understand there are lots of questions and answers related to CORS policy, but here I wanted to make sure if I'm understanding it right and solving it the right way.
I have a visualforce page that ...
- 123
0
votes
1
answer
312
views
Lightning Aura CORS Blocked using JSZip library
I have files on a sharepoint server which I want my lightning aura component to get and download for me. I am using JSZip to zip the files together.
As my download function requests the files from the ...
0
votes
0
answers
1k
views
No 'Access-Control-Allow-Origin' header is present with JavaScript fetch request
I am trying to make this fetch request to the user interface api using react:
const newpost = {
method: "POST",
headers: {
Authorization: "Bearer " + this.state.accessToken,...
- 198
0
votes
2
answers
3k
views
Log in to salesforce from a react app
I need to request an authorization code so my application can make a simple request to salesforce. Hitting the url in the article redirects me to the right page where I can grab the code, but I first ...
- 198
0
votes
1
answer
8k
views
CORS: No "Access-Control-Allow-Origin" header is present on the requested resource
The developer has included the Web-to-Lead form I have provided in his React - js application. I have enabled the CORS in Salesforce, but the developer is receiving the below error message, when they ...
- 129
1
vote
0
answers
114
views
How do i use wordpress navigational menus in salesforce communites site using CMS Connect? Running into CORS and CSP issues
Hey Everyone! I want to use the nav menu from or wordpress site on our salesforce communities based help center using Salesforce CMS connect. But, I am running into some issues that the wider internet ...
- 11
0
votes
0
answers
781
views
CORS issue while authenticating an external web app to Salesforce
I'm trying to authenticate to saleforce using Connected App and web application, My request succeed with Postman but when I try send the request from the Web App I get CORS issue and OAuth ...
1
vote
1
answer
1k
views
What could cause a static resource to be unavailable on Lightning Community (Experience)?
I have a Lightning Community (Experience) where we are using CMS Connect to pull in a header and footer from a static resource.
The resources there are not loading, though. In the Builder tool, they ...
- 13.5k
0
votes
2
answers
4k
views
CORS issue in LWC
I am testing on Field Service Lightning mobile app LWC pilot feature. Here apex is not supported in Field service mobile with LWC.
So, I am trying to make a SF rest resource callout, to get the ...
- 447
0
votes
1
answer
594
views
Enable CORS for Visualforce page
I developed Visualforce page and I want to redirect to external website using apex:actionFunction, every time I execute actionFuncton I got the following error
Access to XMLHttpRequest at 'https://...
- 43
2
votes
0
answers
477
views
CORS error loading 3rd party Google API in LWC
I need some help because I'm encountering a CORS error using the Google API javascript library (taken from https://apis.google.com/js/api.js) running inside Lightning Web Components.
Error message in ...
1
vote
1
answer
1k
views
Marketing Cloud API Request - Access to fetch at '[auth URL]' from origin 'https://localhost:3000' has been blocked by CORS policy
I'm hoping someone can help me with this as I've been struggling with it for a few days now...
Issue:
Access to fetch at '[auth url]' from origin 'https://localhost:3000' has been blocked by CORS ...
- 338
0
votes
1
answer
1k
views
What does same origin policy mean when trying to submit a Web to lead form via AJAX? [closed]
I am stuck working on a task, I get a same origin policy error :
Access to XMLHttpRequest at
'https://webto.salesforce.com/servlet/servlet.WebToLead?encoding=UTF-8'
from origin 'http://localhost' has ...
- 154
1
vote
1
answer
4k
views
Call Salesforce API from client side code in Aura/LWC
I want to call Salesforce REST APIs (to the same salesforce org where lightning component is built) from client side JS code in Aura/LWC. I have done some research and thought of this approach.
Add ...
0
votes
0
answers
123
views
How does Salesforce "external services" manage CORS?
I start by testing calling a REST API from Postman : this works.
I then set up a Salesforce "External Service" and call the same service from a Flow : this works.
Then I create a LWC ...
- 764
1
vote
0
answers
880
views
Is it possible to return CORS headers (Access-Control-Allow-Origin) on 401 Unauthorized responses?
I've enabled CORS and am using My Domain to successfully make REST API requests from a browser, after getting an Access Token via the User-Agent flow. My goal is to also use the Refresh Token to ...
- 777
1
vote
1
answer
839
views
iframe/embed salesforce into another site
Is this possible to do anymore?
I'm trying to iframe Salesforce, in it's entirety for SSO functionality without having the user leave my web application. My application is a connected app and we would ...
- 113
1
vote
1
answer
362
views
Lightning Out/Appointment Scheduling CORB issue
I have an FSL scheduling flow that is on a public community page, and am trying to expose it on an external site via lightning out (https://help.salesforce.com/articleView?id=ls_expose_flow_on_website....
- 21
1
vote
2
answers
1k
views
Flow exposed in external website using Lightning out - Not Rendering, no error
What I did
Aura Component
<aura:component>
<lightning:flow aura:id="flowData"/>
</aura:component>
Controller
({
init: function (component, event, helper) {
...
- 282
1
vote
1
answer
4k
views
Using Google Maps API with Lightning Web Components to retrieve Latitude and Longitude - CORS issue
I need to get latitude and longitude results from a text input that takes an address or zipcode. I am trying to do this with Lightning Web Components either using a LWC input with loadScript or ...
- 106
0
votes
1
answer
1k
views
We added the header Access-Control-Allow-Credentials to true
We load JS code by creating a script tag with dynamic src endpoint and append the script element into the page our src will call resource apex class (@RestResource)
I know that Community domain is ...
4
votes
2
answers
892
views
Externally hosted Javascript is unable to access Visualforce page
From my Visualforce page I am calling an externally hosted Javascript app:
<apex:page>
<apex:iframe src="https://external.com/index.html" id="theFrame" />
</apex:...
- 37.3k
1
vote
1
answer
193
views
OAuth 2.0 JWT Bearer Flow - XMLHttpRequest CORS and SameSite error and Gack
We are implamenting a chatbot using the OAuth 2.0 JWT Bearer Token Flow and see the above errors in the browser client degugger. We already have a valid access token and the origin has already been ...
- 21
1
vote
0
answers
3k
views
Web-to-lead API CORS issue
I am using the We-to-lead form to populate Sales Force, but I would like the form to submit via AJAX rather than default form submission. The default form submission works fine and populates Sales ...
- 111
0
votes
0
answers
391
views
CORS wildcard with multi-level subdomains
I'm working through enabling the salesforce embedded login form on a website. I have a test environment for the website that is a bit dynamic and changes with different git branches. For example: ...
- 101
1
vote
0
answers
95
views
Authenticate Custom Content Block throws a CORS issue
I'm sitting up the SSO login for my application which is a custom content block by redirecting the user to the link below:
var redirectRoute = "https://" + process.env.DEFAULT_BASE_URI + &...
0
votes
1
answer
3k
views
CORS error when calling SF rest api from localhost
I have a small JS application running on localhost. I am getting an access token through the user-agent flow (this works fine).
I then make an http request to the identity endpoint to get back my user ...
- 7,441
1
vote
0
answers
217
views
CORS problem in Lightning
My Lightning component makes 'GET' callouts for two different URLs of the same service.
For one it goes correct each time: https://cors-anywhere.herokuapp.com/https://integration.visma.net/API/...
- 41
3
votes
1
answer
670
views
Lightning Out LWC File Not Found?
I know I'm not the first person to ask about this, but I have yet to find a solution to fix it.
Problem: I'm receiving a 404 error (file not found) when trying to load a lightning web component via ...
- 155
2
votes
0
answers
456
views
Whitelist ionic://localhost in Salesforce Org for CORS
We are doing REST calls from JavaScript in an IONIC mobile app. Which calls the APIs of Salesforce by using a connected App.
On the development machine, we are able to call the standard Salesforce ...
- 2,362
1
vote
1
answer
409
views
How to export flow to external website
I am trying to use flow in my local as mentioned here
This is how the code looks like:
And I'm getting this CORS issue:
Access to XMLHttpRequest at 'https://casesrnd-dev-ed.lightning.force.com//...
- 33
3
votes
0
answers
174
views
How to enable CORS in a community
Hi i've recently encountered a problem where i needed CORS to be enabled for some domains. In the Salesforce Org i can specify CORS to be enabled for some domains. The problem lies with community ...
- 243