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import type { ParsedUrlQuery } from 'querystring'
import { getLocationOrigin } from '../../utils'
import { searchParamsToUrlQuery } from './querystring'
export interface ParsedRelativeUrl {
hash: string
href: string
pathname: string
query: ParsedUrlQuery
search: string
slashes: undefined
}
/**
* Parses path-relative urls (e.g. `/hello/world?foo=bar`). If url isn't path-relative
* (e.g. `./hello`) then at least base must be.
* Absolute urls are rejected with one exception, in the browser, absolute urls that are on
* the current origin will be parsed as relative
*/
export function parseRelativeUrl(
url: string,
base?: string,
parseQuery?: true
): ParsedRelativeUrl
export function parseRelativeUrl(
url: string,
base: string | undefined,
parseQuery: false
): Omit<ParsedRelativeUrl, 'query'>
export function parseRelativeUrl(
url: string,
base?: string,
parseQuery = true
): ParsedRelativeUrl | Omit<ParsedRelativeUrl, 'query'> {
const globalBase = new URL(
typeof window === 'undefined' ? 'http://n' : getLocationOrigin()
)
const resolvedBase = base
? new URL(base, globalBase)
: url.startsWith('.')
? new URL(
typeof window === 'undefined' ? 'http://n' : window.location.href
)
: globalBase
const { pathname, searchParams, search, hash, href, origin } = new URL(
url,
resolvedBase
)
if (origin !== globalBase.origin) {
throw new Error(`invariant: invalid relative URL, router received ${url}`)
}
return {
pathname,
query: parseQuery ? searchParamsToUrlQuery(searchParams) : undefined,
search,
hash,
href: href.slice(origin.length),
// We don't know for relative URLs at this point since we set a custom, internal
// base that isn't surfaced to users.
slashes: undefined,
}
}
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