mirror of https://github.com/vuejs/core.git
60 lines
1.3 KiB
TypeScript
60 lines
1.3 KiB
TypeScript
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import {
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App,
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VNode,
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createVNode,
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ssrUtils,
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createApp,
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ssrContextKey
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} from 'vue'
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import { isString, isPromise } from '@vue/shared'
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import { renderComponentVNode, SSRBuffer, SSRContext } from './render'
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import { Readable } from 'stream'
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const { isVNode } = ssrUtils
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async function unrollBuffer(
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buffer: SSRBuffer,
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stream: Readable
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): Promise<void> {
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for (let i = 0; i < buffer.length; i++) {
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let item = buffer[i]
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if (isPromise(item)) {
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item = await item
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}
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if (isString(item)) {
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stream.push(item)
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} else {
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await unrollBuffer(item, stream)
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}
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}
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}
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export function renderToStream(
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input: App | VNode,
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context: SSRContext = {}
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): Readable {
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if (isVNode(input)) {
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// raw vnode, wrap with app (for context)
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return renderToStream(createApp({ render: () => input }), context)
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}
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// rendering an app
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const vnode = createVNode(input._component, input._props)
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vnode.appContext = input._context
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// provide the ssr context to the tree
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input.provide(ssrContextKey, context)
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const stream = new Readable()
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Promise.resolve(renderComponentVNode(vnode))
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.then(buffer => unrollBuffer(buffer, stream))
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.then(() => {
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stream.push(null)
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})
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.catch(error => {
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stream.destroy(error)
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})
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return stream
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}
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