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Perl JE demo refresh

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SheetJS 2024-06-30 23:59:01 -04:00
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85
docz/docs/02-getting-started/02-examples/06-loader.md
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@ -36,15 +36,43 @@ This demo was tested in the following configurations:
| Date | Platform |
|:-----------|:--------------------------------------------------------------|
| 2024-06-19 | Apple M2 Max 12-Core CPU + 30-Core GPU (32 GB unified memory) |
| 2024-06-28 | NVIDIA RTX 4090 (24 GB VRAM) + i9-10910 (128 GB RAM) |
| 2024-06-19 | NVIDIA RTX 4080 SUPER (16 GB VRAM) + i9-10910 (128 GB RAM) |
| 2024-06-19 | NVIDIA RTX 3090 (24 GB VRAM) + Ryzen 9 3900XT (128 GB RAM) |
This explanation was verified against LangChain 0.2.
SheetJS users have verified this demo in other configurations:
<details>
<summary><b>Other tested configurations</b> (click to show)</summary>
| Demo | Platform |
|:------------|:-------------------------------------------------------------|
| LangChainJS | NVIDIA RTX 4070 Ti (12 GB VRAM) + Ryzen 7 5800x (64 GB RAM) |
| LangChainJS | NVIDIA RTX 3090 (24 GB VRAM) + Ryzen 9 3900XT (128 GB RAM) |
| LangChainJS | NVIDIA RTX 3060 (12 GB VRAM) + i5-11400 (32 GB RAM) |
| LangChainJS | NVIDIA RTX 2080 (12 GB VRAM) + i7-9700K (16 GB RAM) |
| LangChainJS | NVIDIA RTX 2060 (6 GB VRAM) + Ryzen 5 3600 (32 GB RAM) |
| LangChainJS | NVIDIA GTX 1080 (8 GB VRAM) + Ryzen 7 5800x (64 GB RAM) |
</details>
Special thanks to:
- [`@Rasmus`](https://tengstedt.dev/)
- [Ben Halverson](https://benhalverson.dev/)
- [Navid Nami](https://github.com/CaseoJKL)
- [`@Smor`](https://smor.dev/)
- [`@timbr`](https://timbr.dev/)
:::
## CSV Loader
:::note pass
This explanation was verified against LangChain 0.2.
:::
Document loaders generate data objects ("documents") and associated metadata
from data sources.
@ -638,12 +666,22 @@ export default class LoadOfSheet extends BufferLoader {
The demo performs the query "Which rows have over 40 miles per gallon?" against
a [sample cars dataset](pathname:///cd.xls) and displays the results.
:::note pass
SheetJS team members have tested this demo on Windows 10 and Windows 11 using
PowerShell and Ollama for Windows.
SheetJS users have also tested this demo within Windows Subsystem for Linux.
:::
:::caution pass
This demo was tested using the ChatQA-1.5 model[^9] in Ollama[^10].
The tested model requires 9.2GB VRAM. It is strongly recommended to run the demo
on a newer Apple Silicon Mac or a PC with an Nvidia GPU with at least 12GB VRAM.
The tested model used up to 9.2GB VRAM. It is strongly recommended to run the
demo on a newer Apple Silicon Mac or a PC with an Nvidia GPU with at least 12GB
VRAM. SheetJS users have tested the demo on systems with as little as 6GB VRAM.
:::
@ -665,16 +703,33 @@ curl -LO https://docs.sheetjs.com/loadofsheet/query.mjs
curl -LO https://docs.sheetjs.com/loadofsheet/loadofsheet.mjs
```
:::note pass
In PowerShell, the command may fail with a parameter error:
```
Invoke-WebRequest : A parameter cannot be found that matches parameter name 'LO'.
```
`curl.exe` must be invoked directly:
```bash
curl.exe -LO https://docs.sheetjs.com/loadofsheet/query.mjs
curl.exe -LO https://docs.sheetjs.com/loadofsheet/loadofsheet.mjs
```
:::
2) Install the SheetJS NodeJS module:
<CodeBlock language="bash">{`\
npm i --save https://cdn.sheetjs.com/xlsx-${current}/xlsx-${current}.tgz`}
</CodeBlock>
3) Install LangChain and HNSWLib dependencies:
3) Install dependencies:
```bash
npm i --save @langchain/community@0.2.0 @langchain/core@0.2.6 langchain@0.2.5 hnswlib-node@3.0.0 peggy@3.0.2
npm i --save @langchain/community@0.2.0 @langchain/core@0.2.6 langchain@0.2.5 peggy@3.0.2
```
4) Download the [cars dataset](pathname:///cd.xls):
@ -683,6 +738,22 @@ npm i --save @langchain/community@0.2.0 @langchain/core@0.2.6 langchain@0.2.5 hn
curl -LO https://docs.sheetjs.com/cd.xls
```
:::note pass
In PowerShell, the command may fail with a parameter error:
```
Invoke-WebRequest : A parameter cannot be found that matches parameter name 'LO'.
```
`curl.exe` must be invoked directly:
```bash
curl.exe -LO https://docs.sheetjs.com/cd.xls
```
:::
5) Install the `llama3-chatqa:8b-v1.5-q8_0` model using Ollama:
```bash
@ -705,7 +776,7 @@ node query.mjs
The demo performs the query "Which rows have over 40 miles per gallon?". It will
print the following nine results:
```js title="Expected output"
```js title="Expected output (order of lines may differ)"
{ Name: 'volkswagen rabbit custom diesel', MPG: 43.1 }
{ Name: 'vw rabbit c (diesel)', MPG: 44.3 }
{ Name: 'renault lecar deluxe', MPG: 40.9 }

10
docz/docs/03-demos/01-math/21-pandas.md
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@ -41,7 +41,7 @@ This demo was tested in the following deployments:
| Architecture | JS Engine | Pandas | Python | Date |
|:-------------|:----------------|:-------|:-------|:-----------|
| `darwin-x64` | Duktape `2.7.0` | 2.2.1 | 3.12.2 | 2024-03-15 |
| `darwin-arm` | Duktape `2.7.0` | 2.0.3 | 3.11.7 | 2024-02-13 |
| `darwin-arm` | Duktape `2.7.0` | 2.2.2 | 3.12.3 | 2024-06-30 |
| `win10-x64` | Duktape `2.7.0` | 2.2.1 | 3.12.2 | 2024-03-25 |
| `win11-arm` | Duktape `2.7.0` | 2.2.2 | 3.11.5 | 2024-06-20 |
| `linux-x64` | Duktape `2.7.0` | 1.5.3 | 3.11.3 | 2024-03-21 |
@ -520,7 +520,7 @@ This demo was tested in the following deployments:
| Architecture | JS Engine | Polars | Python | Date |
|:-------------|:----------------|:--------|:-------|:-----------|
| `darwin-x64` | Duktape `2.7.0` | 0.20.15 | 3.12.2 | 2024-03-15 |
| `darwin-arm` | Duktape `2.7.0` | 0.20.7 | 3.11.7 | 2024-02-13 |
| `darwin-arm` | Duktape `2.7.0` | 0.20.31 | 3.12.3 | 2024-06-30 |
| `win10-x64` | Duktape `2.7.0` | 0.20.16 | 3.12.2 | 2024-03-25 |
| `win10-arm` | Duktape `2.7.0` | 0.20.31 | 3.11.5 | 2024-06-20 |
| `linux-x64` | Duktape `2.7.0` | 0.20.16 | 3.11.3 | 2024-03-21 |
@ -612,6 +612,12 @@ sudo apt-get install python3.11-venv
- `venv` is included in the `python` package in Arch Linux-based platforms.
- macOS systems with a Python version from Homebrew:
```bash
brew install pyenv-virtualenv
```
After installing `venv`, the following commands set up the virtual environment:
```bash

7
docz/docs/03-demos/03-net/03-server/index.md
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@ -129,8 +129,9 @@ This demo was tested in the following environments:
| NodeJS | Date | Dependencies |
|:----------|:-----------|:------------------------------------|
| `18.19.1` | 2024-02-23 | ExpressJS 4.18.2 + Formidable 2.1.2 |
| `20.11.1` | 2024-02-23 | ExpressJS 4.18.2 + Formidable 2.1.2 |
| `18.20.3` | 2024-06-30 | ExpressJS 4.19.2 + Formidable 2.1.2 |
| `20.15.0` | 2024-06-30 | ExpressJS 4.19.2 + Formidable 2.1.2 |
| `22.3.0` | 2024-06-30 | ExpressJS 4.19.2 + Formidable 2.1.2 |
:::
@ -145,7 +146,7 @@ echo '{ "type": "module" }' > package.json
1) Install the dependencies:
<CodeBlock language="bash">{`\
npm i --save https://cdn.sheetjs.com/xlsx-${current}/xlsx-${current}.tgz express@4.18.2 formidable@2.1.2`}
npm i --save https://cdn.sheetjs.com/xlsx-${current}/xlsx-${current}.tgz express@4.19.2 formidable@2.1.2`}
</CodeBlock>
2) Create a worker script `worker.js` that listens for messages. When a message

11
docz/docs/03-demos/27-local/02-websql.md
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@ -139,9 +139,6 @@ db.readTransaction(tx =>
Using `book_new` and `book_append_sheet`[^5], a workbook object can be created.
This workbook is typically exported to the filesystem with `writeFile`[^6].
## Live Demo
:::note Tested Deployments
@ -150,15 +147,15 @@ This browser demo was tested in the following environments:
| Browser | Date |
|:------------|:-----------|
| Chrome 118 | 2024-02-11 |
| Chrome 118 | 2024-06-29 |
Browsers that do not support WebSQL will throw errors:
| Browser | Date | Error Message |
|:------------|:-----------|:------------------------------|
| Chrome 120 | 2024-02-11 | `openDatabase is not defined` |
| Safari 17.4 | 2024-03-15 | `Web SQL is deprecated` |
| Firefox 122 | 2024-03-15 | `openDatabase is not defined` |
| Chrome 126 | 2024-06-29 | `openDatabase is not defined` |
| Safari 17.1 | 2024-06-29 | `Web SQL is deprecated` |
| Firefox 127 | 2024-06-29 | `openDatabase is not defined` |
:::

5
docz/docs/03-demos/27-local/05-clipboard.md
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@ -22,9 +22,8 @@ Each browser demo was tested in the following environments:
| Browser | Date | Notes
|:------------|:-----------|:-------------------------|
| Chrome 121 | 2024-02-21 | |
| Safari 17.3 | 2024-02-21 | `text/rtf` not supported |
| Brave 1.59 | 2024-02-21 | |
| Chrome 126 | 2024-06-30 | |
| Safari 17.3 | 2024-06-30 | `text/rtf` not supported |
:::

2
docz/docs/03-demos/32-extensions/02-chromium.md
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@ -171,7 +171,7 @@ npm install
"version": "0.0.0",
"author": "**",
// highlight-next-line
"description": "Sample Extension using SheetJS to interact with Chrome",
"description": "Sample Extension using SheetJS to interact with Chrome",
```
3) Edit `manifest.ts` and add to the `permissions` array:

23
docz/docs/03-demos/32-extensions/06-osa.md
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@ -18,14 +18,18 @@ OSA originally supported the "AppleScript" language. Modern macOS releases
[SheetJS](https://sheetjs.com) is a JavaScript library for reading and writing
data from spreadsheets.
This demo uses SheetJS in OSA Scripts to pull data from a spreadsheet. We'll
explore how to use SheetJS libraries in AppleScript and JavaScript scripts. The
["Complete Demo"](#complete-demo) parses workbooks and generates CSV rows.
:::note Tested Environments
This demo was tested in the following environments:
| macOS | Language | Date |
|:---------|:------------------|:-----------|
| `14.3.1` | AppleScript (OSA) | 2024-02-21 |
| `14.3.1` | JavaScript (JXA) | 2024-02-21 |
| macOS | Language | Date |
|:-------|:------------------|:-----------|
| `14.5` | AppleScript (OSA) | 2024-06-30 |
| `14.5` | JavaScript (JXA) | 2024-06-30 |
:::
@ -263,5 +267,16 @@ chmod +x sheetosa.scpt
</TabItem>
</Tabs>
If successful, CSV rows from the first worksheet will be printed:
```
Name,Index
Bill Clinton,42
GeorgeW Bush,43
Barack Obama,44
Donald Trump,45
Joseph Biden,46
```
[^1]: See ["Introduction to AppleScript Overview"](https://developer.apple.com/library/archive/documentation/AppleScript/Conceptual/AppleScriptX/AppleScriptX.html) in the Apple Developer documentation for more details.
[^2]: See ["Introduction to JavaScript for Automation Release Notes"](https://developer.apple.com/library/archive/releasenotes/InterapplicationCommunication/RN-JavaScriptForAutomation/Articles/Introduction.html) in the Apple Developer documentation for more details.

26
docz/docs/03-demos/37-bigdata/01-stream.md
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@ -145,17 +145,17 @@ This demo was tested in the following deployments:
| Node Version | Date | Node Status when tested |
|:-------------|:-----------|:------------------------|
| `0.12.18` | 2024-02-23 | End-of-Life |
| `4.9.1` | 2024-02-23 | End-of-Life |
| `6.17.1` | 2024-02-23 | End-of-Life |
| `8.17.0` | 2024-02-23 | End-of-Life |
| `10.24.1` | 2024-02-23 | End-of-Life |
| `12.22.12` | 2024-02-23 | End-of-Life |
| `14.21.3` | 2024-02-23 | End-of-Life |
| `16.20.2` | 2024-02-23 | End-of-Life |
| `18.19.1` | 2024-02-23 | Maintenance LTS |
| `20.11.1` | 2024-02-23 | Active LTS |
| `22.0.0` | 2024-04-25 | Current |
| `0.12.18` | 2024-06-30 | End-of-Life |
| `4.9.1` | 2024-06-30 | End-of-Life |
| `6.17.1` | 2024-06-30 | End-of-Life |
| `8.17.0` | 2024-06-30 | End-of-Life |
| `10.24.1` | 2024-06-30 | End-of-Life |
| `12.22.12` | 2024-06-30 | End-of-Life |
| `14.21.3` | 2024-06-30 | End-of-Life |
| `16.20.2` | 2024-06-30 | End-of-Life |
| `18.20.3` | 2024-06-30 | Maintenance LTS |
| `20.15.0` | 2024-06-30 | Active LTS |
| `22.3.0` | 2024-06-30 | Current |
While streaming methods work in End-of-Life versions of NodeJS, production
deployments should upgrade to a Current or LTS version of NodeJS.
@ -220,8 +220,8 @@ Each browser demo was tested in the following environments:
| Browser | Date |
|:------------|:-----------|
| Chrome 121 | 2024-02-23 |
| Safari 17.3 | 2024-02-23 |
| Chrome 126 | 2024-06-30 |
| Safari 17.3 | 2024-06-30 |
:::

6
docz/docs/03-demos/42-engines/01-duktape.md
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@ -405,7 +405,7 @@ This demo was tested in the following deployments:
| Architecture | Version | PHP | Date |
|:-------------|:--------|:---------|:-----------|
| `darwin-x64` | `2.7.0` | `8.3.4` | 2024-03-15 |
| `darwin-arm` | `2.7.0` | `8.3.2` | 2024-02-13 |
| `darwin-arm` | `2.7.0` | `8.3.8` | 2024-06-30 |
| `linux-x64` | `2.7.0` | `8.2.7` | 2024-03-21 |
| `linux-arm` | `2.7.0` | `8.2.18` | 2024-05-25 |
@ -547,7 +547,7 @@ This demo was tested in the following deployments:
| Architecture | Version | Python | Date |
|:-------------|:--------|:---------|:-----------|
| `darwin-x64` | `2.7.0` | `3.12.2` | 2024-03-15 |
| `darwin-arm` | `2.7.0` | `3.11.7` | 2024-02-13 |
| `darwin-arm` | `2.7.0` | `3.12.3` | 2024-06-30 |
| `linux-x64` | `2.7.0` | `3.11.3` | 2024-03-21 |
| `linux-arm` | `2.7.0` | `3.11.2` | 2024-05-25 |
@ -1015,7 +1015,7 @@ This demo was tested in the following deployments:
| Architecture | Version | Date |
|:-------------|:--------|:-----------|
| `darwin-x64` | `2.2.0` | 2024-03-15 |
| `darwin-arm` | `2.2.0` | 2024-02-13 |
| `darwin-arm` | `2.2.0` | 2024-06-30 |
| `linux-x64` | `2.2.0` | 2024-03-21 |
| `linux-arm` | `2.2.0` | 2024-05-25 |

2
docz/docs/03-demos/42-engines/04-jsc.md
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@ -319,7 +319,7 @@ Swift on MacOS supports JavaScriptCore without additional dependencies.
| Architecture | Swift | Date |
|:-------------|:--------|:-----------|
| `darwin-x64` | `5.10` | 2024-04-04 |
| `darwin-arm` | `5.9.2` | 2024-02-21 |
| `darwin-arm` | `5.10` | 2024-06-30 |
**Compiled**

57
docz/docs/03-demos/42-engines/22-perl.md
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@ -1,5 +1,6 @@
---
title: Perl + JE
title: Data Processing with JE
sidebar_label: Perl + JE
pagination_prev: demos/bigdata/index
pagination_next: solutions/input
---
@ -14,17 +15,35 @@ C engine like [`JavaScript::Duktape`](/docs/demos/engines/duktape#perl)
:::
JE is a pure-Perl JavaScript engine.
[`JE`](https://metacpan.org/pod/JE) is a pure-Perl JavaScript engine.
The [ExtendScript build](/docs/getting-started/installation/extendscript) can be
parsed and evaluated in a JE context.
[SheetJS](https://sheetjs.com) is a JavaScript library for reading and writing
data from spreadsheets.
This demo uses JE and SheetJS to pull data from a spreadsheet and print CSV
rows. We'll explore how to load SheetJS in a JE context and process spreadsheets
from Perl scripts.
The ["Complete Example"](#complete-example) section includes a complete script
for reading data from XLS files, printing CSV rows, and writing FODS workbooks.
## Integration Details
The engine deviates from ES3. Modifying prototypes can fix some behavior:
The [SheetJS ExtendScript build](/docs/getting-started/installation/extendscript)
can be parsed and evaluated in a JE context.
```js
The engine deviates from ES3. Modifying prototypes can fix some behavior:
<details>
<summary><b>Required shim to support JE</b> (click to show)</summary>
The following features are implemented:
- simple string `charCodeAt`
- Number `charCodeAt` (to work around string `split` bug)
- String `match` (to work around a bug when there are no matches)
```js title="Required shim to support JE"
/* String#charCodeAt is missing */
var string = "";
for(var i = 0; i < 256; ++i) string += String.fromCharCode(i);
@ -45,6 +64,8 @@ String.prototype.match = function(p) {
};
```
</details>
When loading the ExtendScript build, the BOM must be removed:
```perl
@ -106,9 +127,9 @@ This demo was tested in the following deployments:
| Architecture | Version | Date |
|:-------------|:--------|:-----------|
| `darwin-x64` | `0.066` | 2024-02-13 |
| `darwin-x64` | `0.066` | 2024-06-29 |
| `darwin-arm` | `0.066` | 2024-05-25 |
| `linux-x64` | `0.066` | 2024-02-13 |
| `linux-x64` | `0.066` | 2024-06-29 |
| `linux-arm` | `0.066` | 2024-05-25 |
:::
@ -119,7 +140,23 @@ This demo was tested in the following deployments:
cpan install JE File::Slurp
```
2) Download the [ExtendScript build](/docs/getting-started/installation/extendscript):
:::note pass
There were permissions errors in some test runs:
```
mkdir /Library/Perl/5.30/File: Permission denied at /System/Library/Perl/5.30/ExtUtils/Install.pm line 489.
```
On macOS, the commands should be run through `sudo`:
```bash
sudo cpan install JE File::Slurp
```
:::
2) Download the [SheetJS ExtendScript build](/docs/getting-started/installation/extendscript):
<CodeBlock language="bash">{`\
curl -LO https://cdn.sheetjs.com/xlsx-${current}/package/dist/xlsx.extendscript.js`}
@ -131,7 +168,7 @@ curl -LO https://cdn.sheetjs.com/xlsx-${current}/package/dist/xlsx.extendscript.
curl -LO https://docs.sheetjs.com/perl/SheetJE.pl
```
4) Download a test file and run:
4) Download the [test file](pathname:///cd.xls) and run:
```bash
curl -LO https://docs.sheetjs.com/cd.xls

18
docz/static/loadofsheet/query.mjs
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@ -1,7 +1,9 @@
import { existsSync } from 'fs';
/* NOTE: hnswlib-node@3.0.0 does not install on a fresh Windows 11 setup */
// import { existsSync } from 'fs';
import { ChatOllama } from "@langchain/community/chat_models/ollama";
import { OllamaEmbeddings } from "@langchain/community/embeddings/ollama"
import { HNSWLib } from "@langchain/community/vectorstores/hnswlib";
// import { HNSWLib } from "@langchain/community/vectorstores/hnswlib";
import { MemoryVectorStore } from "langchain/vectorstores/memory";
import { SelfQueryRetriever } from "langchain/retrievers/self_query";
import { FunctionalTranslator } from "@langchain/core/structured_query";
@ -9,12 +11,19 @@ import LoadOfSheet from "./loadofsheet.mjs";
const modelName = "llama3-chatqa:8b-v1.5-q8_0";
console.log(`Using model ${modelName}`);
const model = new ChatOllama({ baseUrl: "http://localhost:11434", model: modelName });
const embeddings = new OllamaEmbeddings({model: modelName});
console.time("load of sheet");
const loader = new LoadOfSheet("./cd.xls");
const docs = await loader.load();
console.timeEnd("load of sheet");
console.time("vector store");
const vectorstore = await MemoryVectorStore.fromDocuments(docs, embeddings);
/*
const vectorstore = await (async() => {
if(!existsSync("store/hnswlib.index")) {
const vectorstore = await HNSWLib.fromDocuments(docs, embeddings);
@ -23,7 +32,10 @@ const vectorstore = await (async() => {
}
return await HNSWLib.load("store", embeddings);
})();
*/
console.timeEnd("vector store");
console.time("query");
const selfQueryRetriever = SelfQueryRetriever.fromLLM({
llm: model,
vectorStore: vectorstore,
@ -36,4 +48,6 @@ const selfQueryRetriever = SelfQueryRetriever.fromLLM({
const res = await selfQueryRetriever.invoke(
"Which rows have over 40 miles per gallon?"
);
console.timeEnd("query");
res.forEach(({metadata}) => { console.log({ Name: metadata.Name, MPG: metadata.Miles_per_Gallon }); });

21
tests/bigdata-stream-nodejs.sh Executable file
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@ -0,0 +1,21 @@
#!/bin/bash
# https://docs.sheetjs.com/docs/demos/bigdata/stream#nodejs
cd /tmp
rm -rf sheetjs-stream
mkdir sheetjs-stream
cd sheetjs-stream
npm i --save https://cdn.sheetjs.com/xlsx-0.20.2/xlsx-0.20.2.tgz
curl -LO https://docs.sheetjs.com/stream/SheetJSNodeJStream.js
curl -LO https://docs.sheetjs.com/pres.xlsx
# this version uses `n` to cycle through node versions
for n in 0.12 4 6 8 10 12 14 16 18 20 22; do
sudo n $n
node --version
node SheetJSNodeJStream.js pres.xlsx
done

80
tests/server-express-worker.sh Executable file
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@ -0,0 +1,80 @@
#!/bin/bash
# https://docs.sheetjs.com/docs/demos/net/server#worker-threads
cd /tmp
rm -rf sheetjs-worker
mkdir sheetjs-worker
cd sheetjs-worker
echo '{ "type": "module" }' > package.json
npm i --save https://cdn.sheetjs.com/xlsx-0.20.2/xlsx-0.20.2.tgz express@4.18.2 formidable@2.1.2
cat >worker.js <<EOF
/* load the worker_threads module */
import { parentPort } from 'node:worker_threads';
/* load the SheetJS module and hook to FS */
import { set_fs, readFile, write } from 'xlsx';
import * as fs from 'fs';
set_fs(fs);
/* the server will send a message with the \`path\` field */
parentPort.on('message', (task) => {
// read file
const wb = readFile(task.path, { dense: true });
// send back XLSX
parentPort.postMessage(write(wb, { type: "buffer", bookType: "xlsx" }));
// remove file
fs.unlink(task.path, ()=>{});
});
EOF
curl -LO https://docs.sheetjs.com/server/worker_pool.js
curl -LO https://docs.sheetjs.com/pres.numbers
cat >main.mjs <<EOF
/* load dependencies */
import os from 'node:os';
import process from 'node:process'
import express from 'express';
import formidable from 'formidable';
/* load worker pool */
import WorkerPool from './worker_pool.js';
const pool = new WorkerPool(os.cpus().length);
process.on("beforeExit", () => { pool.close(); })
/* create server */
const app = express();
app.post('/', (req, res, next) => {
// parse body
const form = formidable({});
form.parse(req, (err, fields, files) => {
// look for "upload" field
if(err) return next(err);
if(!files["upload"]) return next(new Error("missing \`upload\` file"));
// send a message to the worker with the path to the uploaded file
pool.runTask({ path: files["upload"].filepath }, (err, result) => {
if(err) return next(err);
// send the file back as an attachment
res.attachment("SheetJSPool.xlsx");
res.status(200).end(result);
});
});
});
// start server
app.listen(7262, () => { console.log(\`Example app listening on port 7262\`); });
EOF
# this version uses `n` to cycle through node versions
for n in 18 20 22; do
sudo n $n
node --version
npx -y concurrently -k 'node main.mjs' 'sleep 2; curl -X POST -F upload=@pres.numbers http://localhost:7262/ -J -O'
npx -y xlsx-cli SheetJSPool.xlsx
rm -f SheetJSPool.xlsx
done