Error: access blocked by CORS policy

[Viorae]

New Issue Checklist

• I am not disclosing a vulnerability.
• I am not just asking a question.
• I have searched through existing issues.
• I can reproduce the issue with the latest version of Parse Server and the Parse Flutter SDK.

Issue Description

Steps to reproduce

Actual Outcome

Expected Outcome

Environment

Parse Flutter SDK

• SDK version: FILL_THIS_OUT
• Operating system version: FILL_THIS_OUT

Server

• Parse Server version: FILL_THIS_OUT

Logs

[parse-github-assistant]

Thanks for opening this issue!

• ❌ Please check all required checkboxes at the top, otherwise your issue will be closed.

• ⚠️ Remember that a security vulnerability must only be reported confidentially, see our Security Policy. If you are not sure whether the issue is a security vulnerability, the safest way is to treat it as such and submit it confidentially to us for evaluation.

[RodrigoSMarques]

This error is not package related, but your server configuration : allowHeaders.

This is described in the documentation in pub.dev

Early Web support
Currently this requires adding X-Parse-Installation-Id as an allowed header to parse-server. When running directly via docker, set the env var PARSE_SERVER_ALLOW_HEADERS=X-Parse-Installation-Id. When running via express, set [ParseServerOptions](https://parseplatform.org/parse-server/api/master/ParseServerOptions.html) allowHeaders: ['X-Parse-Installation-Id'].

Be aware that for web ParseInstallation does include app name, version or package identifier.

See issue:
#490 , #385

[mtrezza]

I'm closing this as it does not seem to be a Parse Flutter SDK issue.

• For help with Parse Platform we recommend our community forum
• For coding questions we recommend Stack Overflow using the parse-platform tag
• For network and server questions we recommend ServerFault using the parse-server tag

Feel free to comment if you have any questions and we can re-open this issue.