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| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 | 11x 11x 11x 11x 167x 18x 18x 52x 52x 21x 52x 28x 24x 18x 149x 214x 214x 257x 257x 192x 65x 214x 11x 161x 25x 136x 136x 136x 136x 136x 136x 136x 7x 7x 7x | import {
App,
createApp,
createVNode,
ssrContextKey,
ssrUtils,
VNode
} from 'vue'
import { isPromise, isString } from '@vue/shared'
import { SSRContext, renderComponentVNode, SSRBuffer } from './render'
const { isVNode } = ssrUtils
async function unrollBuffer(buffer: SSRBuffer): Promise<string> {
if (buffer.hasAsync) {
let ret = ''
for (let i = 0; i < buffer.length; i++) {
let item = buffer[i]
if (isPromise(item)) {
item = await item
}
if (isString(item)) {
ret += item
} else {
ret += await unrollBuffer(item)
}
}
return ret
} else {
// sync buffer can be more efficiently unrolled without unnecessary await
// ticks
return unrollBufferSync(buffer)
}
}
function unrollBufferSync(buffer: SSRBuffer): string {
let ret = ''
for (let i = 0; i < buffer.length; i++) {
let item = buffer[i]
if (isString(item)) {
ret += item
} else {
// since this is a sync buffer, child buffers are never promises
ret += unrollBufferSync(item as SSRBuffer)
}
}
return ret
}
export async function renderToString(
input: App | VNode,
context: SSRContext = {}
): Promise<string> {
if (isVNode(input)) {
// raw vnode, wrap with app (for context)
return renderToString(createApp({ render: () => input }), context)
}
// rendering an app
const vnode = createVNode(input._component, input._props)
vnode.appContext = input._context
// provide the ssr context to the tree
input.provide(ssrContextKey, context)
const buffer = await renderComponentVNode(vnode)
await resolveTeleports(context)
return unrollBuffer(buffer as SSRBuffer)
}
async function resolveTeleports(context: SSRContext) {
if (context.__teleportBuffers) {
context.teleports = context.teleports || {}
for (const key in context.__teleportBuffers) {
// note: it's OK to await sequentially here because the Promises were
// created eagerly in parallel.
context.teleports[key] = await unrollBuffer(
(await Promise.all(context.__teleportBuffers[key])) as SSRBuffer
)
}
}
}
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