mirror of https://github.com/coder/code-server.git
144 lines
7.0 KiB
Diff
144 lines
7.0 KiB
Diff
Serve webviews from the same origin
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Normally webviews are served from vscode-webview.net but we would rather them be
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self-hosted.
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When doing this CSP will block resources (for example when viewing images) so
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add 'self' to the CSP to fix that.
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Additionally the service worker defaults to handling *all* requests made to the
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current host but when self-hosting the webview this will end up including the
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webview HTML itself which means these requests will fail since the communication
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channel between the webview and the main thread has not been set up yet as the
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webview itself is not ready yet (it has no HTML and therefore no script either).
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Since this code exists only for the authentication case we can just skip it when
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it is served from the current host as authentication is not a problem if the
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request is not cross-origin.
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There is also an origin check we bypass (this seems to be related to how the
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webview host is separate by default but we serve on the same host).
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To test, open a few types of webviews (images, markdown, extension details, etc).
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Make sure to update the hash. To do so:
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1. run code-server
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2. open any webview (i.e. preview Markdown)
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3. see error in console and copy hash
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That will test the hash change in pre/index.html
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Double-check the console to make sure there are no console errors for the webWorkerExtensionHostIframe
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which also requires a hash change.
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parentOriginHash changes
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This fixes webviews from not working properly due to a change upstream.
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Upstream added a check to ensure parent authority is encoded into the webview
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origin. Since our webview origin is the parent authority, we can bypass this
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check.
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Index: code-server/lib/vscode/src/vs/workbench/services/environment/browser/environmentService.ts
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===================================================================
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--- code-server.orig/lib/vscode/src/vs/workbench/services/environment/browser/environmentService.ts
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+++ code-server/lib/vscode/src/vs/workbench/services/environment/browser/environmentService.ts
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@@ -225,7 +225,7 @@ export class BrowserWorkbenchEnvironment
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@memoize
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get webviewExternalEndpoint(): string {
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- const endpoint = this.options.webviewEndpoint
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+ const endpoint = (this.options.webviewEndpoint && new URL(this.options.webviewEndpoint, window.location.toString()).toString())
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|| this.productService.webviewContentExternalBaseUrlTemplate
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|| 'https://{{uuid}}.vscode-cdn.net/{{quality}}/{{commit}}/out/vs/workbench/contrib/webview/browser/pre/';
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Index: code-server/lib/vscode/src/vs/server/node/webClientServer.ts
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===================================================================
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--- code-server.orig/lib/vscode/src/vs/server/node/webClientServer.ts
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+++ code-server/lib/vscode/src/vs/server/node/webClientServer.ts
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@@ -326,6 +326,7 @@ export class WebClientServer {
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const workbenchWebConfiguration = {
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remoteAuthority,
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serverBasePath: this._basePath,
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+ webviewEndpoint: vscodeBase + this._staticRoute + '/out/vs/workbench/contrib/webview/browser/pre',
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_wrapWebWorkerExtHostInIframe,
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developmentOptions: { enableSmokeTestDriver: this._environmentService.args['enable-smoke-test-driver'] ? true : undefined, logLevel: this._logService.getLevel() },
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settingsSyncOptions: !this._environmentService.isBuilt && this._environmentService.args['enable-sync'] ? { enabled: true } : undefined,
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@@ -385,7 +386,7 @@ export class WebClientServer {
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return void res.end('Not found');
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}
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- const webWorkerExtensionHostIframeScriptSHA = 'sha256-2Q+j4hfT09+1+imS46J2YlkCtHWQt0/BE79PXjJ0ZJ8=';
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+ const webWorkerExtensionHostIframeScriptSHA = 'sha256-3Q+j4hfT09+1+imS46J2YlkCtHWQt0/BE79PXjJ0ZJ8=';
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const cspDirectives = [
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'default-src \'self\';',
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Index: code-server/lib/vscode/src/vs/workbench/contrib/webview/browser/pre/index.html
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===================================================================
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--- code-server.orig/lib/vscode/src/vs/workbench/contrib/webview/browser/pre/index.html
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+++ code-server/lib/vscode/src/vs/workbench/contrib/webview/browser/pre/index.html
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@@ -5,7 +5,7 @@
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<meta charset="UTF-8">
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<meta http-equiv="Content-Security-Policy"
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- content="default-src 'none'; script-src 'sha256-DXeP32g8BdMsVuVabYTmznoTH59F7M7UtV0vXemEFqc=' 'self'; frame-src 'self'; style-src 'unsafe-inline';">
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+ content="default-src 'none'; script-src 'sha256-z5v/0xE4zQPgV1fazhHB/UlsTzdm39hRMk3V8Av0HI4=' 'self'; frame-src 'self'; style-src 'unsafe-inline';">
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<!-- Disable pinch zooming -->
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@@ -349,6 +349,12 @@
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const hostname = location.hostname;
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+ // It is safe to run if we are on the same host.
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+ const parent = new URL(parentOrigin)
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+ if (parent.hostname === hostname) {
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+ return start(parentOrigin)
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+ }
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+
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if (!crypto.subtle) {
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// cannot validate, not running in a secure context
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throw new Error(`'crypto.subtle' is not available so webviews will not work. This is likely because the editor is not running in a secure context (https://developer.mozilla.org/en-US/docs/Web/Security/Secure_Contexts).`);
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Index: code-server/lib/vscode/src/vs/workbench/contrib/webview/browser/pre/index-no-csp.html
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===================================================================
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--- code-server.orig/lib/vscode/src/vs/workbench/contrib/webview/browser/pre/index-no-csp.html
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+++ code-server/lib/vscode/src/vs/workbench/contrib/webview/browser/pre/index-no-csp.html
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@@ -343,6 +343,12 @@
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const hostname = location.hostname;
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+ // It is safe to run if we are on the same host.
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+ const parent = new URL(parentOrigin)
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+ if (parent.hostname === hostname) {
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+ return start(parentOrigin)
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+ }
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+
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if (!crypto.subtle) {
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// cannot validate, not running in a secure context
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throw new Error(`'crypto.subtle' is not available so webviews will not work. This is likely because the editor is not running in a secure context (https://developer.mozilla.org/en-US/docs/Web/Security/Secure_Contexts).`);
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Index: code-server/lib/vscode/src/vs/workbench/services/extensions/worker/webWorkerExtensionHostIframe.html
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===================================================================
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--- code-server.orig/lib/vscode/src/vs/workbench/services/extensions/worker/webWorkerExtensionHostIframe.html
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+++ code-server/lib/vscode/src/vs/workbench/services/extensions/worker/webWorkerExtensionHostIframe.html
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@@ -4,7 +4,7 @@
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<meta http-equiv="Content-Security-Policy" content="
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default-src 'none';
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child-src 'self' data: blob:;
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- script-src 'self' 'unsafe-eval' 'sha256-xM2KVDKIoeb8vVxk4ezEUsxdTZh5wFnKO3YmFhy9tkk=' https: http://localhost:* blob:;
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+ script-src 'self' 'unsafe-eval' 'sha256-yM2KVDKIoeb8vVxk4ezEUsxdTZh5wFnKO3YmFhy9tkk=' https: http://localhost:* blob:;
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connect-src 'self' https: wss: http://localhost:* http://127.0.0.1:* ws://localhost:* ws://127.0.0.1:*;"/>
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</head>
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<body>
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@@ -23,6 +23,13 @@
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// validation not requested
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return start();
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}
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+
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+ // It is safe to run if we are on the same host.
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+ const parent = new URL(parentOrigin)
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+ if (parent.hostname === hostname) {
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+ return start()
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+ }
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+
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if (!crypto.subtle) {
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// cannot validate, not running in a secure context
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return sendError(new Error(`Cannot validate in current context!`));
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