37 lines
1.3 KiB
TypeScript
37 lines
1.3 KiB
TypeScript
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import { getApiKey, getBaseUrlValue } from '../client'
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/**
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* Construct a download URL with auth token as query parameter.
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* Token is passed via query param because <a> tags cannot set headers.
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*/
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export function getDownloadUrl(filePath: string, fileName?: string): string {
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const base = getBaseUrlValue()
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const params = new URLSearchParams({ path: filePath })
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if (fileName) params.set('name', fileName)
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const token = getApiKey()
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if (token) params.set('token', token)
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return `${base}/api/hermes/download?${params.toString()}`
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}
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/**
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* Download a file. Uses fetch to detect errors, then creates a blob URL
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* for the browser download. Throws with error message on failure.
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*/
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export async function downloadFile(filePath: string, fileName?: string): Promise<void> {
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const url = getDownloadUrl(filePath, fileName)
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const res = await fetch(url)
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if (!res.ok) {
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const body = await res.json().catch(() => ({ error: `HTTP ${res.status}` }))
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throw new Error(body.error || `Download failed: ${res.status}`)
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}
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const blob = await res.blob()
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const blobUrl = URL.createObjectURL(blob)
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const a = document.createElement('a')
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a.href = blobUrl
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a.download = fileName || filePath.split('/').pop() || 'download'
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document.body.appendChild(a)
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a.click()
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document.body.removeChild(a)
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URL.revokeObjectURL(blobUrl)
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}
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