next/dist/esm/server/lib/server-action-request-meta.js

The React Framework

import { ACTION_HEADER } from '../../client/components/app-router-headers';
export function getServerActionRequestMetadata(req) {
    let actionId;
    let contentType;
    if (req.headers instanceof Headers) {
        actionId = req.headers.get(ACTION_HEADER.toLowerCase()) ?? null;
        contentType = req.headers.get('content-type');
    } else {
        actionId = req.headers[ACTION_HEADER.toLowerCase()] ?? null;
        contentType = req.headers['content-type'] ?? null;
    }
    const isURLEncodedAction = Boolean(req.method === 'POST' && contentType === 'application/x-www-form-urlencoded');
    const isMultipartAction = Boolean(req.method === 'POST' && (contentType == null ? void 0 : contentType.startsWith('multipart/form-data')));
    const isFetchAction = Boolean(actionId !== undefined && typeof actionId === 'string' && req.method === 'POST');
    const isServerAction = Boolean(isFetchAction || isURLEncodedAction || isMultipartAction);
    return {
        actionId,
        isURLEncodedAction,
        isMultipartAction,
        isFetchAction,
        isServerAction
    };
}
export function getIsServerAction(req) {
    return getServerActionRequestMetadata(req).isServerAction;
}

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