feat: bypass built-in CORS handling for workspace apps #15669
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dannykopping
commented
Nov 27, 2024
| @@ -395,41 +397,73 @@ func (s *Server) HandleSubdomain(middlewares ...func(http.Handler) http.Handler) | |||
| return | |||
| } | |||
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| // Use the passed in app middlewares before checking authentication and | |||
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Note to reviewers: this is the meat of the change.
I had to move some things around here since the token was only being created after CORS was handled, and the defined behavior is stored in the token.
I moved the CORS middleware invocation into determineCORSBehavior because we needed to conditionally invoke it if behavior != passthru, only.
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Signed-off-by: Danny Kopping <danny@coder.com>
Signed-off-by: Danny Kopping <danny@coder.com>
Signed-off-by: Danny Kopping <danny@coder.com>
Signed-off-by: Danny Kopping <danny@coder.com>
Signed-off-by: Danny Kopping <danny@coder.com>
Signed-off-by: Danny Kopping <danny@coder.com>
Signed-off-by: Danny Kopping <danny@coder.com>
Signed-off-by: Danny Kopping <danny@coder.com>
Signed-off-by: Danny Kopping <danny@coder.com>
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Signed-off-by: Danny Kopping <danny@coder.com>
Signed-off-by: Danny Kopping <danny@coder.com>
This was referenced Nov 29, 2024
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Reopening; this has been deprioritized slightly but not forgotten. |
cstyan
added a commit
that referenced
this pull request
Jul 30, 2025
…8706) Solves #15096 This is a slight rework/refactor of the earlier PRs from @dannykopping and @Emyrk: - #15669 - #15684 - #17596 Rather than having a per-app CORS behaviour setting and additionally a template level setting for ports, this PR adds a single template level CORS behaviour setting that is then used by all apps/ports for workspaces created from that template. The main changes are in `proxy.go` and `request.go` to: a) get the CORS behaviour setting from the template b) have `HandleSubdomain` bypass the CORS middleware handler if the selected behaviour is `passthru` c) in `proxyWorkspaceApp`, do not modify the response if the selected behaviour is `passthru` <!-- This is an auto-generated comment: release notes by coderabbit.ai --> ## Summary by CodeRabbit * **New Features** * Added support for configuring CORS behavior ("simple" or "passthru") at the template level for all shared ports. * Introduced a new "CORS Behavior" setting in the template creation and settings forms. * API endpoints and responses now include the optional `cors_behavior` property for templates. * Workspace apps and proxy now honor the specified CORS behavior, enabling conditional CORS middleware application. * Enhanced workspace app tests with comprehensive scenarios covering CORS behaviors and authentication states. * **Bug Fixes** * None. * **Documentation** * Updated API and admin documentation to describe the new `cors_behavior` property and its usage. * Added examples and schema references for CORS behavior in relevant API docs. * **Tests** * Extended automated tests to cover different CORS behavior scenarios for templates and workspace apps. * **Chores** * Updated audit logging to track changes to the `cors_behavior` field on templates. <!-- end of auto-generated comment: release notes by coderabbit.ai --> --------- Signed-off-by: Callum Styan <callumstyan@gmail.com>
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NOTE: this PR is blocked; we want to first introduce this feature to port shares, as it has transpired that that use-case is far more common. It would be awkward to get this PR into the next release but not for port shares, so we're keeping this one on hold.
This PR introduces a partial fix for #15096; it allows operators to specify the CORS behavior on a per-
coder_applevel.This change requires
cors_behaviorto be set on a givencoder_app; coder/terraform-provider-coder#309 introduces that new attribute.coderdcurrently handles CORS automatically by handling preflight requests and stripping CORS headers from upstreamcoder_appresponses.Two CORS behaviors are defined in this PR:
simple: the current behavior of handling CORS withincoderdpassthru: new behavior which transparently bypasses our CORS handling incoderdso thecoder_appservice is then fully responsible for handling CORSWe plan to further add this behavior to port shares.
The sharing level (
owner,authenticated,public) is still respected, regardless of CORS behavior.