72 lines
1.8 KiB
Go
72 lines
1.8 KiB
Go
package main
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import (
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b64 "encoding/base64"
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"fmt"
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"os"
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"io/ioutil"
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"github.com/dop251/goja"
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)
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func safe_run_file(vm *goja.Runtime, file string) {
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data, err := ioutil.ReadFile(file)
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if err != nil { panic(err) }
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src := string(data)
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_, err = vm.RunString(src)
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if err != nil { panic(err) }
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}
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func eval_string(vm *goja.Runtime, cmd string) goja.Value {
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v, err := vm.RunString(cmd)
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if err != nil { panic(err) }
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return v
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}
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func write_type(vm *goja.Runtime, t string) {
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/* due to some wonkiness with array passing, use base64 */
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b64str := eval_string(vm, "XLSX.write(wb, {type:'base64', bookType:'" + t + "'})")
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buf, err := b64.StdEncoding.DecodeString(b64str.String());
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if err != nil { panic(err) }
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err = ioutil.WriteFile("sheetjsg." + t, buf, 0644)
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if err != nil { panic(err) }
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}
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func main() {
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vm := goja.New()
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/* initialize */
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eval_string(vm, "if(typeof global == 'undefined') global = (function(){ return this; }).call(null);")
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/* load library */
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safe_run_file(vm, "shim.min.js")
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safe_run_file(vm, "xlsx.core.min.js")
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/* get version string */
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v := eval_string(vm, "XLSX.version")
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fmt.Printf("SheetJS library version %s\n", v)
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/* read file */
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data, err := ioutil.ReadFile(os.Args[1])
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if err != nil { panic(err) }
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vm.Set("buf", data)
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fmt.Printf("Loaded file %s\n", os.Args[1])
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/* parse workbook */
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eval_string(vm, "var bstr = ''; for(var i = 0; i < buf.length; ++i) bstr += String.fromCharCode(buf[i]);")
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eval_string(vm, "wb = XLSX.read(bstr, {type:'binary', cellNF:true});")
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eval_string(vm, "ws = wb.Sheets[wb.SheetNames[0]]")
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/* print CSV */
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csv := eval_string(vm, "XLSX.utils.sheet_to_csv(ws)")
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fmt.Printf("%s\n", csv)
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/* change cell A1 to 3 */
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eval_string(vm, "ws['A1'].v = 3; delete ws['A1'].w;")
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/* write file */
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//write_type(vm, "xlsb")
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//write_type(vm, "xlsx")
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write_type(vm, "xls")
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write_type(vm, "csv")
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}
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