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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 | 10x 10x 10x 10x 158x 18x 18x 52x 52x 21x 52x 28x 24x 18x 140x 205x 205x 248x 248x 183x 65x 205x 10x 152x 25x 127x 127x 127x 127x 127x 127x 127x 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 ) } } } |