docs.sheetjs.com/docz/static/boa/main.rs

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/*! sheetjs (C) SheetJS -- https://sheetjs.com */
use std::path::Path;
use std::string::String;
use std::fs;
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use boa_engine::{js_string, Context, Source, JsError};
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use boa_engine::object::builtins::JsArrayBuffer;
use boa_engine::property::Attribute;
fn eval_file(c: &mut Context, path: &str) -> Result<String, JsError> {
let src = Source::from_filepath(Path::new(path)).unwrap();
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match c.eval(src) {
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Ok(res) => { return Ok(res.to_string(c).unwrap().to_std_string_escaped()); }
Err(e) => { return Err(e); }
};
}
fn eval_code(c: &mut Context, code: &str) -> Result<String, JsError> {
let src = Source::from_bytes(code);
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match c.eval(src) {
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Ok(res) => { return Ok(res.to_string(c).unwrap().to_std_string_escaped()); }
Err(e) => { return Err(e); }
};
}
fn main() {
let context = &mut Context::default();
/* load library */
match eval_file(context, "./xlsx.full.min.js") {
Ok(_res) => {}
Err(e) => { return eprintln!("Uncaught {e}"); }
}
/* get version string */
match eval_code(context, "XLSX.version") {
Ok(res) => { println!( "SheetJS library version {}", res); }
Err(e) => { return eprintln!("Uncaught {e}"); }
}
/* read file */
let data: Vec<u8> = fs::read("pres.xlsx").unwrap();
let array: JsArrayBuffer = JsArrayBuffer::from_byte_block(data, context).unwrap();
let attrs = Attribute::WRITABLE | Attribute::ENUMERABLE | Attribute::CONFIGURABLE;
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context.register_global_property(js_string!("buf"), array, attrs);
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/* parse workbook and assign to global `wb` property */
match eval_code(context, "void (globalThis.wb = XLSX.read(buf))") {
Ok(_res) => { }
Err(e) => { return eprintln!("Uncaught {e}"); }
}
/* print CSV of first worksheet */
match eval_code(context, "XLSX.utils.sheet_to_csv(wb.Sheets[wb.SheetNames[0]])") {
Ok(res) => { println!( "{}", res); }
Err(e) => { return eprintln!("Uncaught {e}"); }
}
}