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feat: Add a hint when users are overriding the default host header #9952

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Merged
cwangsmv merged 2 commits into from
May 27, 2026
+21 −1
Merged

feat: Add a hint when users are overriding the default host header #9952

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f7ae8de
add a hint when user is modifying the host header
cwangsmv May 26, 2026
26d8091
update description
cwangsmv May 27, 2026
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22 changes: 21 additions & 1 deletion packages/insomnia/src/ui/components/mcp/mcp-request-pane.tsx
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Original file line number Diff line number Diff line change
Expand Up @@ -50,6 +50,23 @@ const PaneReadOnlyBanner = () => {
);
};

const ModifyHostHeaderBanner = () => {
return (
<div
style={{
paddingTop: 'var(--padding-md)',
paddingLeft: 'var(--padding-md)',
paddingRight: 'var(--padding-md)',
}}
>
<p className="notice warning no-margin-top no-margin-bottom">
You are adding a new <strong>Host</strong> header which will override the default behavior. Remove or disable
the new header to return to default behavior.
</p>
</div>
);
};

interface Props {
environment: Environment | null;
readyState: McpReadyState;
Expand Down Expand Up @@ -94,7 +111,9 @@ export const McpRequestPane: FC<Props> = ({
const requestId = activeRequest._id;
const isStdio = activeRequest.transportType === 'stdio';

const headersCount = activeRequest.headers.filter(h => !h.disabled).length + readOnlyHttpPairs.length;
const activeRequestHeaders = activeRequest.headers.filter(h => !h.disabled);
const headersCount = activeRequestHeaders.length + readOnlyHttpPairs.length;
const isModifyingHostHeader = activeRequestHeaders.some(h => h.name.toLowerCase() === 'host');
const patchRequest = useRequestPatcher();
const mcpPayloadPatcher = useRequestPayloadPatcher();
const latestPayloadPatcherRef = useLatest(mcpPayloadPatcher);
Expand Down Expand Up @@ -397,6 +416,7 @@ export const McpRequestPane: FC<Props> = ({
</TabPanel>
<TabPanel className="w-full flex-1 overflow-y-auto" id="headers">
{!isDisconnected && <PaneReadOnlyBanner />}
{isDisconnected && isModifyingHostHeader && <ModifyHostHeaderBanner />}
<RequestHeadersEditor
Comment on lines 418 to 420
key={uniqueKey}
headers={activeRequest.headers}
Expand Down
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