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import type { IncomingMessage } from 'http'
import type { BaseNextRequest } from '../base-http'
import type { NextRequest } from '../web/exports'
import { ACTION_HEADER } from '../../client/components/app-router-headers'
export function getServerActionRequestMetadata(
req: IncomingMessage | BaseNextRequest | NextRequest
): {
actionId: string | null
isURLEncodedAction: boolean
isMultipartAction: boolean
isFetchAction: boolean
isPossibleServerAction: boolean
} {
let actionId: string | null
let contentType: string | null
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()] as string) ?? 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?.startsWith('multipart/form-data')
)
const isFetchAction = Boolean(
actionId !== undefined &&
typeof actionId === 'string' &&
req.method === 'POST'
)
const isPossibleServerAction = Boolean(
isFetchAction || isURLEncodedAction || isMultipartAction
)
return {
actionId,
isURLEncodedAction,
isMultipartAction,
isFetchAction,
isPossibleServerAction,
}
}
export function getIsPossibleServerAction(
req: IncomingMessage | BaseNextRequest | NextRequest
): boolean {
return getServerActionRequestMetadata(req).isPossibleServerAction
}
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