| 1 | 'use strict'; |
| 2 | |
| 3 | const {PassThrough, Transform} = require('stream'); |
| 4 | |
| 5 | // --------------------------------------------------------------------------- |
| 6 | // Fizz (Node) — renders App directly via Node streams. |
| 7 | // Returns a Node Readable stream of HTML. |
| 8 | // --------------------------------------------------------------------------- |
| 9 | |
| 10 | function renderFizzNode(AppComponent, itemCount) { |
| 11 | const React = require('react'); |
| 12 | const {renderToPipeableStream} = require('react-dom/server'); |
| 13 | |
| 14 | const output = new PassThrough(); |
| 15 | const {pipe} = renderToPipeableStream( |
| 16 | React.createElement(AppComponent, {itemCount}), |
| 17 | { |
| 18 | onShellReady() { |
| 19 | pipe(output); |
| 20 | }, |
| 21 | onError(e) { |
| 22 | console.error('Fizz Node error:', e); |
| 23 | output.destroy(e); |
| 24 | }, |
| 25 | } |
| 26 | ); |
| 27 | return output; |
| 28 | } |
| 29 | |
| 30 | // --------------------------------------------------------------------------- |
| 31 | // Fizz (Edge) — renders App directly via web streams. |
| 32 | // Returns a promise that resolves to a web ReadableStream of HTML. |
| 33 | // --------------------------------------------------------------------------- |
| 34 | |
| 35 | function renderFizzEdge(AppComponent, itemCount) { |
| 36 | const React = require('react'); |
| 37 | const {renderToReadableStream} = require('react-dom/server'); |
| 38 | |
| 39 | return renderToReadableStream(React.createElement(AppComponent, {itemCount})); |
| 40 | } |
| 41 | |
| 42 | // --------------------------------------------------------------------------- |
| 43 | // Flight + Fizz (Node) — RSC render → tee → Fizz + script injection. |
| 44 | // HTML chunks are buffered within a tick to avoid injecting scripts mid-tag. |
| 45 | // Returns a Node Readable stream of HTML with injected Flight scripts. |
| 46 | // --------------------------------------------------------------------------- |
| 47 | |
| 48 | function renderFlightFizzNode( |
| 49 | renderRSCNode, |
| 50 | AppComponent, |
| 51 | itemCount, |
| 52 | clientManifest, |
| 53 | ssrManifest, |
| 54 | opts |
| 55 | ) { |
| 56 | const inject = !opts || opts.inject !== false; |
| 57 | const React = require('react'); |
| 58 | const {renderToPipeableStream} = require('react-dom/server'); |
| 59 | const {createFromNodeStream} = require('react-server-dom-webpack/client'); |
| 60 | |
| 61 | const {pipe: rscPipe} = renderRSCNode( |
| 62 | clientManifest, |
| 63 | AppComponent, |
| 64 | itemCount |
| 65 | ); |
| 66 | |
| 67 | let flightStream; |
| 68 | let flightScripts = ''; |
| 69 | if (inject) { |
| 70 | // Tee the Flight stream into SSR + script injection |
| 71 | const trunk = new PassThrough(); |
| 72 | const forSsr = new PassThrough(); |
| 73 | const forInline = new PassThrough(); |
| 74 | trunk.pipe(forSsr); |
| 75 | trunk.pipe(forInline); |
| 76 | |
| 77 | forInline.on('data', function (chunk) { |
| 78 | flightScripts += |
| 79 | '<script>(self.__FLIGHT_DATA||=[]).push(' + |
| 80 | JSON.stringify(chunk.toString()) + |
| 81 | ')</script>'; |
| 82 | }); |
| 83 | |
| 84 | rscPipe(trunk); |
| 85 | flightStream = forSsr; |
| 86 | } else { |
| 87 | flightStream = new PassThrough(); |
| 88 | rscPipe(flightStream); |
| 89 | } |
| 90 | |
| 91 | let cachedResult; |
| 92 | function Root() { |
| 93 | if (!cachedResult) { |
| 94 | cachedResult = createFromNodeStream(flightStream, ssrManifest); |
| 95 | } |
| 96 | return React.use(cachedResult); |
| 97 | } |
| 98 | |
| 99 | const output = new PassThrough(); |
| 100 | |
| 101 | const {pipe} = renderToPipeableStream(React.createElement(Root), { |
| 102 | onShellReady() { |
| 103 | if (inject) { |
| 104 | // Buffer HTML chunks within a tick to avoid injecting scripts mid-tag. |
| 105 | const trailer = '</body></html>'; |
| 106 | let buffered = []; |
| 107 | let timeout = null; |
| 108 | const injector = new Transform({ |
| 109 | transform(chunk, _encoding, cb) { |
| 110 | buffered.push(chunk); |
| 111 | if (!timeout) { |
| 112 | timeout = setTimeout(() => { |
| 113 | for (const buf of buffered) { |
| 114 | let str = buf.toString(); |
| 115 | if (str.endsWith(trailer)) { |
| 116 | str = str.slice(0, -trailer.length); |
| 117 | } |
| 118 | this.push(str); |
| 119 | } |
| 120 | buffered.length = 0; |
| 121 | timeout = null; |
| 122 | if (flightScripts) { |
| 123 | this.push(flightScripts); |
| 124 | flightScripts = ''; |
| 125 | } |
| 126 | }, 0); |
| 127 | } |
| 128 | cb(); |
| 129 | }, |
| 130 | flush(cb) { |
| 131 | if (timeout) { |
| 132 | clearTimeout(timeout); |
| 133 | for (const buf of buffered) { |
| 134 | let str = buf.toString(); |
| 135 | if (str.endsWith(trailer)) { |
| 136 | str = str.slice(0, -trailer.length); |
| 137 | } |
| 138 | this.push(str); |
| 139 | } |
| 140 | buffered.length = 0; |
| 141 | } |
| 142 | if (flightScripts) { |
| 143 | this.push(flightScripts); |
| 144 | flightScripts = ''; |
| 145 | } |
| 146 | this.push(trailer); |
| 147 | cb(); |
| 148 | }, |
| 149 | }); |
| 150 | pipe(injector); |
| 151 | injector.pipe(output); |
| 152 | } else { |
| 153 | pipe(output); |
| 154 | } |
| 155 | }, |
| 156 | onError(e) { |
| 157 | console.error('Flight+Fizz Node error:', e); |
| 158 | output.destroy(e); |
| 159 | }, |
| 160 | }); |
| 161 | |
| 162 | return output; |
| 163 | } |
| 164 | |
| 165 | // --------------------------------------------------------------------------- |
| 166 | // Flight + Fizz (Edge) — RSC render → tee → Fizz + script injection via web |
| 167 | // streams. HTML chunks are buffered within a tick to avoid injecting scripts |
| 168 | // mid-tag. The </body></html> trailer is stripped, Flight scripts injected, |
| 169 | // and the trailer re-added at flush. |
| 170 | // Returns a promise that resolves to a web ReadableStream. |
| 171 | // --------------------------------------------------------------------------- |
| 172 | |
| 173 | function renderFlightFizzEdge( |
| 174 | renderRSCEdge, |
| 175 | AppComponent, |
| 176 | itemCount, |
| 177 | clientManifest, |
| 178 | ssrManifest, |
| 179 | opts |
| 180 | ) { |
| 181 | const inject = !opts || opts.inject !== false; |
| 182 | const React = require('react'); |
| 183 | const {renderToReadableStream} = require('react-dom/server'); |
| 184 | const { |
| 185 | createFromReadableStream, |
| 186 | } = require('react-server-dom-webpack/client.edge'); |
| 187 | |
| 188 | const webStream = renderRSCEdge(clientManifest, AppComponent, itemCount); |
| 189 | |
| 190 | let forSsr; |
| 191 | let injector; |
| 192 | |
| 193 | if (inject) { |
| 194 | const htmlTrailer = '</body></html>'; |
| 195 | const enc = new TextEncoder(); |
| 196 | |
| 197 | let forInline; |
| 198 | [forSsr, forInline] = webStream.tee(); |
| 199 | |
| 200 | let resolveInline; |
| 201 | const inlinePromise = new Promise(function (r) { |
| 202 | resolveInline = r; |
| 203 | }); |
| 204 | const htmlDecoder = new TextDecoder(); |
| 205 | let buffered = []; |
| 206 | let timeout = null; |
| 207 | |
| 208 | function flushBuffered(controller) { |
| 209 | for (const chunk of buffered) { |
| 210 | let buf = htmlDecoder.decode(chunk, {stream: true}); |
| 211 | if (buf.endsWith(htmlTrailer)) { |
| 212 | buf = buf.slice(0, -htmlTrailer.length); |
| 213 | } |
| 214 | controller.enqueue(enc.encode(buf)); |
| 215 | } |
| 216 | const remaining = htmlDecoder.decode(); |
| 217 | if (remaining.length) { |
| 218 | let buf = remaining; |
| 219 | if (buf.endsWith(htmlTrailer)) { |
| 220 | buf = buf.slice(0, -htmlTrailer.length); |
| 221 | } |
| 222 | controller.enqueue(enc.encode(buf)); |
| 223 | } |
| 224 | buffered.length = 0; |
| 225 | timeout = null; |
| 226 | } |
| 227 | |
| 228 | function writeFlightChunk(data, controller) { |
| 229 | controller.enqueue( |
| 230 | enc.encode( |
| 231 | '<script>(self.__FLIGHT_DATA||=[]).push(' + |
| 232 | JSON.stringify(data) + |
| 233 | ')</script>' |
| 234 | ) |
| 235 | ); |
| 236 | } |
| 237 | |
| 238 | injector = new TransformStream({ |
| 239 | start(controller) { |
| 240 | (async function () { |
| 241 | const reader = forInline.getReader(); |
| 242 | const decoder = new TextDecoder('utf-8', {fatal: true}); |
| 243 | for (;;) { |
| 244 | const {done, value} = await reader.read(); |
| 245 | if (done) break; |
| 246 | writeFlightChunk(decoder.decode(value, {stream: true}), controller); |
| 247 | } |
| 248 | const remaining = decoder.decode(); |
| 249 | if (remaining.length) { |
| 250 | writeFlightChunk(remaining, controller); |
| 251 | } |
| 252 | resolveInline(); |
| 253 | })(); |
| 254 | }, |
| 255 | transform(chunk, controller) { |
| 256 | buffered.push(chunk); |
| 257 | if (!timeout) { |
| 258 | timeout = setTimeout(function () { |
| 259 | flushBuffered(controller); |
| 260 | }, 0); |
| 261 | } |
| 262 | }, |
| 263 | async flush(controller) { |
| 264 | await inlinePromise; |
| 265 | if (timeout) { |
| 266 | clearTimeout(timeout); |
| 267 | flushBuffered(controller); |
| 268 | } |
| 269 | controller.enqueue(enc.encode(htmlTrailer)); |
| 270 | }, |
| 271 | }); |
| 272 | } else { |
| 273 | forSsr = webStream; |
| 274 | } |
| 275 | |
| 276 | const cachedResult = createFromReadableStream(forSsr, { |
| 277 | serverConsumerManifest: ssrManifest, |
| 278 | }); |
| 279 | function Root() { |
| 280 | return React.use(cachedResult); |
| 281 | } |
| 282 | |
| 283 | return renderToReadableStream(React.createElement(Root)).then( |
| 284 | function (htmlStream) { |
| 285 | return injector ? htmlStream.pipeThrough(injector) : htmlStream; |
| 286 | } |
| 287 | ); |
| 288 | } |
| 289 | |
| 290 | // --------------------------------------------------------------------------- |
| 291 | // Utilities: collect streams into strings. |
| 292 | // --------------------------------------------------------------------------- |
| 293 | |
| 294 | function nodeStreamToString(nodeStream) { |
| 295 | return new Promise(function (resolve, reject) { |
| 296 | const chunks = []; |
| 297 | nodeStream.on('data', function (chunk) { |
| 298 | chunks.push(chunk); |
| 299 | }); |
| 300 | nodeStream.on('end', function () { |
| 301 | resolve(Buffer.concat(chunks).toString('utf-8')); |
| 302 | }); |
| 303 | nodeStream.on('error', reject); |
| 304 | }); |
| 305 | } |
| 306 | |
| 307 | function webStreamToString(webStream) { |
| 308 | const reader = webStream.getReader(); |
| 309 | const chunks = []; |
| 310 | function read() { |
| 311 | return reader.read().then(function ({done, value}) { |
| 312 | if (done) { |
| 313 | return Buffer.concat(chunks).toString('utf-8'); |
| 314 | } |
| 315 | chunks.push(Buffer.from(value)); |
| 316 | return read(); |
| 317 | }); |
| 318 | } |
| 319 | return read(); |
| 320 | } |
| 321 | |
| 322 | module.exports = { |
| 323 | renderFizzNode, |
| 324 | renderFizzEdge, |
| 325 | renderFlightFizzNode, |
| 326 | renderFlightFizzEdge, |
| 327 | nodeStreamToString, |
| 328 | webStreamToString, |
| 329 | }; |