55 lines
2.0 KiB
JavaScript
55 lines
2.0 KiB
JavaScript
'use strict';
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// Server-side render Hydrogen to a string.
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//
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// We use a `child_process` because we want to be able to exit the process after
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// we receive the SSR results. We don't want Hydrogen to keep running after we
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// get our initial rendered HTML.
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const assert = require('assert');
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const RethrownError = require('../lib/rethrown-error');
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const runInChildProcess = require('../child-process-runner/run-in-child-process');
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// The render should be fast. If it's taking more than 5 seconds, something has
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// gone really wrong.
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const RENDER_TIMEOUT = 5000;
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async function renderHydrogenToString(renderOptions) {
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assert(renderOptions.vmRenderScriptFilePath);
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assert(renderOptions.vmRenderContext);
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try {
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// In development, if you're running into a hard to track down error with
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// the render hydrogen stack and fighting against the multiple layers of
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// complexity with `child_process `and `vm`; you can get away with removing
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// the `child_process` part of it by using
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// `render-hydrogen-to-string-unsafe` directly.
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// ```js
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// const _renderHydrogenToStringUnsafe = require('../hydrogen-render/render-hydrogen-to-string-unsafe');
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// const hydrogenHtmlOutput = await _renderHydrogenToStringUnsafe(renderOptions);
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// ```
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//
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// We use a child_process because we want to be able to exit the process after
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// we receive the SSR results. We don't want Hydrogen to keep running after we
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// get our initial rendered HTML.
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const hydrogenHtmlOutput = await runInChildProcess(
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require.resolve('./render-hydrogen-to-string-unsafe'),
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renderOptions,
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{
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timeout: RENDER_TIMEOUT,
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}
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);
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return hydrogenHtmlOutput;
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} catch (err) {
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throw new RethrownError(
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`Failed to render Hydrogen to string. In order to reproduce, feed in these arguments into \`renderHydrogenToString(...)\`:\n renderHydrogenToString arguments: ${JSON.stringify(
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renderOptions
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)}`,
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err
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);
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}
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}
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module.exports = renderHydrogenToString;
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