service/vendor/github.com/xuri/excelize/v2/file.go

234 lines
6.1 KiB
Go

// Copyright 2016 - 2023 The excelize Authors. All rights reserved. Use of
// this source code is governed by a BSD-style license that can be found in
// the LICENSE file.
//
// Package excelize providing a set of functions that allow you to write to and
// read from XLAM / XLSM / XLSX / XLTM / XLTX files. Supports reading and
// writing spreadsheet documents generated by Microsoft Excel™ 2007 and later.
// Supports complex components by high compatibility, and provided streaming
// API for generating or reading data from a worksheet with huge amounts of
// data. This library needs Go version 1.16 or later.
package excelize
import (
"archive/zip"
"bytes"
"encoding/xml"
"io"
"os"
"path/filepath"
"strings"
"sync"
)
// NewFile provides a function to create new file by default template.
// For example:
//
// f := NewFile()
func NewFile(opts ...Options) *File {
f := newFile()
f.Pkg.Store("_rels/.rels", []byte(xml.Header+templateRels))
f.Pkg.Store(defaultXMLPathDocPropsApp, []byte(xml.Header+templateDocpropsApp))
f.Pkg.Store(defaultXMLPathDocPropsCore, []byte(xml.Header+templateDocpropsCore))
f.Pkg.Store(defaultXMLPathWorkbookRels, []byte(xml.Header+templateWorkbookRels))
f.Pkg.Store("xl/theme/theme1.xml", []byte(xml.Header+templateTheme))
f.Pkg.Store("xl/worksheets/sheet1.xml", []byte(xml.Header+templateSheet))
f.Pkg.Store(defaultXMLPathStyles, []byte(xml.Header+templateStyles))
f.Pkg.Store(defaultXMLPathWorkbook, []byte(xml.Header+templateWorkbook))
f.Pkg.Store(defaultXMLPathContentTypes, []byte(xml.Header+templateContentTypes))
f.SheetCount = 1
f.CalcChain, _ = f.calcChainReader()
f.ContentTypes, _ = f.contentTypesReader()
f.Styles, _ = f.stylesReader()
f.WorkBook, _ = f.workbookReader()
f.Relationships = sync.Map{}
rels, _ := f.relsReader(defaultXMLPathWorkbookRels)
f.Relationships.Store(defaultXMLPathWorkbookRels, rels)
f.sheetMap["Sheet1"] = "xl/worksheets/sheet1.xml"
ws, _ := f.workSheetReader("Sheet1")
f.Sheet.Store("xl/worksheets/sheet1.xml", ws)
f.Theme, _ = f.themeReader()
f.options = getOptions(opts...)
return f
}
// Save provides a function to override the spreadsheet with origin path.
func (f *File) Save(opts ...Options) error {
if f.Path == "" {
return ErrSave
}
for i := range opts {
f.options = &opts[i]
}
return f.SaveAs(f.Path, *f.options)
}
// SaveAs provides a function to create or update to a spreadsheet at the
// provided path.
func (f *File) SaveAs(name string, opts ...Options) error {
if len(name) > MaxFilePathLength {
return ErrMaxFilePathLength
}
f.Path = name
if _, ok := supportedContentTypes[strings.ToLower(filepath.Ext(f.Path))]; !ok {
return ErrWorkbookFileFormat
}
file, err := os.OpenFile(filepath.Clean(name), os.O_WRONLY|os.O_TRUNC|os.O_CREATE, os.ModePerm)
if err != nil {
return err
}
defer file.Close()
return f.Write(file, opts...)
}
// Close closes and cleanup the open temporary file for the spreadsheet.
func (f *File) Close() error {
var err error
if f.sharedStringTemp != nil {
if err := f.sharedStringTemp.Close(); err != nil {
return err
}
}
f.tempFiles.Range(func(k, v interface{}) bool {
if err = os.Remove(v.(string)); err != nil {
return false
}
return true
})
for _, stream := range f.streams {
_ = stream.rawData.Close()
}
return err
}
// Write provides a function to write to an io.Writer.
func (f *File) Write(w io.Writer, opts ...Options) error {
_, err := f.WriteTo(w, opts...)
return err
}
// WriteTo implements io.WriterTo to write the file.
func (f *File) WriteTo(w io.Writer, opts ...Options) (int64, error) {
for i := range opts {
f.options = &opts[i]
}
if len(f.Path) != 0 {
contentType, ok := supportedContentTypes[strings.ToLower(filepath.Ext(f.Path))]
if !ok {
return 0, ErrWorkbookFileFormat
}
if err := f.setContentTypePartProjectExtensions(contentType); err != nil {
return 0, err
}
}
if f.options != nil && f.options.Password != "" {
buf, err := f.WriteToBuffer()
if err != nil {
return 0, err
}
return buf.WriteTo(w)
}
if err := f.writeDirectToWriter(w); err != nil {
return 0, err
}
return 0, nil
}
// WriteToBuffer provides a function to get bytes.Buffer from the saved file,
// and it allocates space in memory. Be careful when the file size is large.
func (f *File) WriteToBuffer() (*bytes.Buffer, error) {
buf := new(bytes.Buffer)
zw := zip.NewWriter(buf)
if err := f.writeToZip(zw); err != nil {
return buf, zw.Close()
}
if f.options != nil && f.options.Password != "" {
if err := zw.Close(); err != nil {
return buf, err
}
b, err := Encrypt(buf.Bytes(), f.options)
if err != nil {
return buf, err
}
buf.Reset()
buf.Write(b)
return buf, nil
}
return buf, zw.Close()
}
// writeDirectToWriter provides a function to write to io.Writer.
func (f *File) writeDirectToWriter(w io.Writer) error {
zw := zip.NewWriter(w)
if err := f.writeToZip(zw); err != nil {
_ = zw.Close()
return err
}
return zw.Close()
}
// writeToZip provides a function to write to zip.Writer
func (f *File) writeToZip(zw *zip.Writer) error {
f.calcChainWriter()
f.commentsWriter()
f.contentTypesWriter()
f.drawingsWriter()
f.vmlDrawingWriter()
f.workBookWriter()
f.workSheetWriter()
f.relsWriter()
_ = f.sharedStringsLoader()
f.sharedStringsWriter()
f.styleSheetWriter()
f.themeWriter()
for path, stream := range f.streams {
fi, err := zw.Create(path)
if err != nil {
return err
}
var from io.Reader
from, err = stream.rawData.Reader()
if err != nil {
_ = stream.rawData.Close()
return err
}
_, err = io.Copy(fi, from)
if err != nil {
return err
}
}
var err error
f.Pkg.Range(func(path, content interface{}) bool {
if err != nil {
return false
}
if _, ok := f.streams[path.(string)]; ok {
return true
}
var fi io.Writer
fi, err = zw.Create(path.(string))
if err != nil {
return false
}
_, err = fi.Write(content.([]byte))
return true
})
f.tempFiles.Range(func(path, content interface{}) bool {
if _, ok := f.Pkg.Load(path); ok {
return true
}
var fi io.Writer
fi, err = zw.Create(path.(string))
if err != nil {
return false
}
_, err = fi.Write(f.readBytes(path.(string)))
return true
})
return err
}