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@@ -0,0 +1,497 @@
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+//Author:TruthHun
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+//Email:[email protected]
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+//Date:2018-01-21
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+package converter
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+
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+import (
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+ "fmt"
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+ "io/ioutil"
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+ "os"
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+ "path/filepath"
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+ "strings"
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+
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+ "time"
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+
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+ "os/exec"
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+
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+ "errors"
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+
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+ "github.com/TruthHun/gotil/cryptil"
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+ "github.com/TruthHun/gotil/filetil"
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+ "github.com/TruthHun/gotil/ziptil"
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+)
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+
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+type Converter struct {
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+ BasePath string
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+ Config Config
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+ Debug bool
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+ GeneratedCover string
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+}
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+
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+//目录结构
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+type Toc struct {
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+ Id int `json:"id"`
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+ Link string `json:"link"`
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+ Pid int `json:"pid"`
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+ Title string `json:"title"`
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+}
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+
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+//config.json文件解析结构
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+type Config struct {
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+ Charset string `json:"charset"` //字符编码，默认utf-8编码
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+ Cover string `json:"cover"` //封面图片，或者封面html文件
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+ Timestamp string `json:"date"` //时间日期,如“2018-01-01 12:12:21”，其实是time.Time格式，但是直接用string就好
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+ Description string `json:"description"` //摘要
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+ Footer string `json:"footer"` //pdf的footer
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+ Header string `json:"header"` //pdf的header
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+ Identifier string `json:"identifier"` //即uuid，留空即可
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+ Language string `json:"language"` //语言，如zh、en、zh-CN、en-US等
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+ Creator string `json:"creator"` //作者，即author
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+ Publisher string `json:"publisher"` //出版单位
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+ Contributor string `json:"contributor"` //同Publisher
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+ Title string `json:"title"` //文档标题
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+ Format []string `json:"format"` //导出格式，可选值：pdf、epub、mobi
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+ FontSize string `json:"font_size"` //默认的pdf导出字体大小
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+ PaperSize string `json:"paper_size"` //页面大小
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+ MarginLeft string `json:"margin_left"` //PDF文档左边距，写数字即可，默认72pt
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+ MarginRight string `json:"margin_right"` //PDF文档左边距，写数字即可，默认72pt
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+ MarginTop string `json:"margin_top"` //PDF文档左边距，写数字即可，默认72pt
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+ MarginBottom string `json:"margin_bottom"` //PDF文档左边距，写数字即可，默认72pt
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+ More []string `json:"more"` //更多导出选项[PDF导出选项，具体参考：https://manual.calibre-ebook.com/generated/en/ebook-convert.html#pdf-output-options]
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+ Toc []Toc `json:"toc"` //目录
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+ ///////////////////////////////////////////
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+ Order []string `json:"-"` //这个不需要赋值
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+}
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+
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+var (
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+ output = "output" //文档导出文件夹
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+ ebookConvert = "ebook-convert"
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+)
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+// 接口文档 https://manual.calibre-ebook.com/generated/en/ebook-convert.html#table-of-contents
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+//根据json配置文件，创建文档转化对象
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+func NewConverter(configFile string, debug ...bool) (converter *Converter, err error) {
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+ var (
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+ cfg Config
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+ basepath string
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+ db bool
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+ )
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+ if len(debug) > 0 {
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+ db = debug[0]
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+ }
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+
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+ if cfg, err = parseConfig(configFile); err == nil {
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+ if basepath, err = filepath.Abs(filepath.Dir(configFile)); err == nil {
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+ //设置默认值
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+ if len(cfg.Timestamp) == 0 {
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+ cfg.Timestamp = time.Now().Format("2006-01-02 15:04:05")
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+ }
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+ if len(cfg.Charset) == 0 {
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+ cfg.Charset = "utf-8"
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+ }
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+ converter = &Converter{
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+ Config: cfg,
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+ BasePath: basepath,
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+ Debug: db,
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+ }
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+ }
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+ }
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+ return
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+}
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+
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+//执行文档转换
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+func (this *Converter) Convert() (err error) {
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+ if !this.Debug { //调试模式下不删除生成的文件
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+ defer this.converterDefer() //最后移除创建的多余而文件
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+ }
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+
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+ if err = this.generateMimeType(); err != nil {
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+ return
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+ }
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+ if err = this.generateMetaInfo(); err != nil {
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+ return
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+ }
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+ if err = this.generateTocNcx(); err != nil { //生成目录
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+ return
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+ }
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+ if err = this.generateSummary(); err != nil { //生成文档内目录
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+ return
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+ }
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+ if err = this.generateTitlePage(); err != nil { //生成封面
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+ return
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+ }
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+ if err = this.generateContentOpf(); err != nil { //这个必须是generate*系列方法的最后一个调用
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+ return
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+ }
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+
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+ //将当前文件夹下的所有文件压缩成zip包，然后直接改名成content.epub
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+ f := this.BasePath + "/content.epub"
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+ os.Remove(f) //如果原文件存在了，则删除;
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+ if err = ziptil.Zip(f, this.BasePath); err == nil {
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+ //创建导出文件夹
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+ os.Mkdir(this.BasePath+"/"+output, os.ModePerm)
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+ if len(this.Config.Format) > 0 {
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+ var errs []string
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+ for _, v := range this.Config.Format {
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+ fmt.Println("convert to " + v)
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+ switch strings.ToLower(v) {
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+ case "epub":
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+ if err = this.convertToEpub(); err != nil {
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+ errs = append(errs, err.Error())
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+ }
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+ case "mobi":
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+ if err = this.convertToMobi(); err != nil {
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+ errs = append(errs, err.Error())
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+ }
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+ case "pdf":
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+ if err = this.convertToPdf(); err != nil {
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+ errs = append(errs, err.Error())
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+ }
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+ }
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+ }
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+ if len(errs) > 0 {
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+ err = errors.New(strings.Join(errs, "\n"))
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+ }
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+ } else {
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+ err = this.convertToPdf()
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+ if err != nil {
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+ fmt.Println(err)
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+ }
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+ }
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+ }
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+ return
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+}
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+
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+//删除生成导出文档而创建的文件
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+func (this *Converter) converterDefer() {
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+ //删除不必要的文件
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+ os.RemoveAll(this.BasePath + "/META-INF")
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+ os.RemoveAll(this.BasePath + "/content.epub")
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+ os.RemoveAll(this.BasePath + "/mimetype")
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+ os.RemoveAll(this.BasePath + "/toc.ncx")
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+ os.RemoveAll(this.BasePath + "/content.opf")
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+ os.RemoveAll(this.BasePath + "/titlepage.xhtml") //封面图片待优化
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+ os.RemoveAll(this.BasePath + "/summary.html") //文档目录
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+}
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+
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+//生成metainfo
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+func (this *Converter) generateMetaInfo() (err error) {
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+ xml := `<?xml version="1.0"?>
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+ <container version="1.0" xmlns="urn:oasis:names:tc:opendocument:xmlns:container">
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+ <rootfiles>
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+ <rootfile full-path="content.opf" media-type="application/oebps-package+xml"/>
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+ </rootfiles>
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+ </container>
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+ `
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+ folder := this.BasePath + "/META-INF"
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+ os.MkdirAll(folder, os.ModePerm)
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+ err = ioutil.WriteFile(folder+"/container.xml", []byte(xml), os.ModePerm)
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+ return
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+}
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+
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+//形成mimetyppe
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+func (this *Converter) generateMimeType() (err error) {
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+ return ioutil.WriteFile(this.BasePath+"/mimetype", []byte("application/epub+zip"), os.ModePerm)
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+}
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+
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+//生成封面
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+func (this *Converter) generateTitlePage() (err error) {
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+ if ext := strings.ToLower(filepath.Ext(this.Config.Cover)); !(ext == ".html" || ext == ".xhtml") {
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+ xml := `<?xml version='1.0' encoding='` + this.Config.Charset + `'?>
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+ <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="` + this.Config.Language + `">
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+ <head>
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+ <meta http-equiv="Content-Type" content="text/html; charset=` + this.Config.Charset + `"/>
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+ <meta name="calibre:cover" content="true"/>
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+ <title>Cover</title>
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+ <style type="text/css" title="override_css">
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+ @page {padding: 0pt; margin:0pt}
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+ body { text-align: center; padding:0pt; margin: 0pt; }
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+ </style>
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+ </head>
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+ <body>
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+ <div>
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+ <svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" version="1.1" width="100%" height="100%" viewBox="0 0 800 1068" preserveAspectRatio="none">
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+ <image width="800" height="1068" xlink:href="` + strings.TrimPrefix(this.Config.Cover, "./") + `"/>
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+ </svg>
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+ </div>
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+ </body>
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+ </html>
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+ `
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+ if err = ioutil.WriteFile(this.BasePath+"/titlepage.xhtml", []byte(xml), os.ModePerm); err == nil {
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+ this.GeneratedCover = "titlepage.xhtml"
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+ }
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+ }
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+ return
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+}
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+
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+//生成文档目录
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+func (this *Converter) generateTocNcx() (err error) {
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+ ncx := `<?xml version='1.0' encoding='` + this.Config.Charset + `'?>
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+ <ncx xmlns="http://www.daisy.org/z3986/2005/ncx/" version="2005-1" xml:lang="%v">
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+ <head>
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+ <meta content="4" name="dtb:depth"/>
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+ <meta content="calibre (2.85.1)" name="dtb:generator"/>
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+ <meta content="0" name="dtb:totalPageCount"/>
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+ <meta content="0" name="dtb:maxPageNumber"/>
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+ </head>
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+ <docTitle>
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+ <text>%v</text>
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+ </docTitle>
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+ <navMap>%v</navMap>
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+ </ncx>
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+ `
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+ codes, _ := this.tocToXml(0, 1)
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+ ncx = fmt.Sprintf(ncx, this.Config.Language, this.Config.Title, strings.Join(codes, ""))
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+ return ioutil.WriteFile(this.BasePath+"/toc.ncx", []byte(ncx), os.ModePerm)
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+}
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+
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+//生成文档目录，即summary.html
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+func (this *Converter) generateSummary() (err error) {
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+ //目录
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+ summary := `<!DOCTYPE html>
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+ <html lang="` + this.Config.Language + `">
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+ <head>
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+ <meta charset="` + this.Config.Charset + `">
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+ <title>目录</title>
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+ <style>
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+ body{margin: 0px;padding: 0px;}h1{text-align: center;padding: 0px;margin: 0px;}ul,li{list-style: none;}
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+ a{text-decoration: none;color: #4183c4;text-decoration: none;font-size: 16px;line-height: 28px;}
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+ </style>
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+ </head>
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+ <body>
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+ <h1>目 录</h1>
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+ %v
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+ </body>
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+ </html>`
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+ summary = fmt.Sprintf(summary, strings.Join(this.tocToSummary(0), ""))
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+ return ioutil.WriteFile(this.BasePath+"/summary.html", []byte(summary), os.ModePerm)
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+}
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+
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+//将toc转成toc.ncx文件
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+func (this *Converter) tocToXml(pid, idx int) (codes []string, next_idx int) {
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+ var code string
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+ for _, toc := range this.Config.Toc {
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+ if toc.Pid == pid {
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+ code, idx = this.getNavPoint(toc, idx)
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+ codes = append(codes, code)
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+ for _, item := range this.Config.Toc {
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+ if item.Pid == toc.Id {
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+ code, idx = this.getNavPoint(item, idx)
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+ codes = append(codes, code)
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+ var code_arr []string
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+ code_arr, idx = this.tocToXml(item.Id, idx)
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+ codes = append(codes, code_arr...)
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+ codes = append(codes, `</navPoint>`)
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+ }
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+ }
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+ codes = append(codes, `</navPoint>`)
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+ }
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+ }
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+ next_idx = idx
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+ return
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+}
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+
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+//将toc转成toc.ncx文件
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+func (this *Converter) tocToSummary(pid int) (summarys []string) {
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+ summarys = append(summarys, "<ul>")
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+ for _, toc := range this.Config.Toc {
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+ if toc.Pid == pid {
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+ summarys = append(summarys, fmt.Sprintf(`<li><a href="%v">%v</a></li>`, toc.Link, toc.Title))
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+ for _, item := range this.Config.Toc {
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+
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+ if item.Pid == toc.Id {
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+ summarys = append(summarys, fmt.Sprintf(`<li><ul><li><a href="%v">%v</a></li>`, item.Link, item.Title))
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+ summarys = append(summarys, "<li>")
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+ summarys = append(summarys, this.tocToSummary(item.Id)...)
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+ summarys = append(summarys, "</li></ul></li>")
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+ }
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+
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+ }
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+ }
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+ }
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+ summarys = append(summarys, "</ul>")
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+ return
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+}
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+
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+//生成navPoint
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+func (this *Converter) getNavPoint(toc Toc, idx int) (navpoint string, nextidx int) {
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+ navpoint = `
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+ <navPoint id="id%v" playOrder="%v">
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+ <navLabel>
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+ <text>%v</text>
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+ </navLabel>
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+ <content src="%v"/>`
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+ navpoint = fmt.Sprintf(navpoint, toc.Id, idx, toc.Title, toc.Link)
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+ this.Config.Order = append(this.Config.Order, toc.Link)
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+ nextidx = idx + 1
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+ return
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+}
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+
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+//生成content.opf文件
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+//倒数第二步调用
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+func (this *Converter) generateContentOpf() (err error) {
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+ var (
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+ guide string
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+ manifest string
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+ manifestArr []string
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+ spine string //注意：如果存在封面，则需要把封面放在第一个位置
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+ spineArr []string
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+ )
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+
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+ meta := `<dc:title>%v</dc:title>
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+ <dc:contributor opf:role="bkp">%v</dc:contributor>
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+ <dc:publisher>%v</dc:publisher>
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+ <dc:description>%v</dc:description>
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+ <dc:language>%v</dc:language>
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+ <dc:creator opf:file-as="Unknown" opf:role="aut">%v</dc:creator>
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+ <meta name="calibre:timestamp" content="%v"/>
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+ `
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+ meta = fmt.Sprintf(meta, this.Config.Title, this.Config.Contributor, this.Config.Publisher, this.Config.Description, this.Config.Language, this.Config.Creator, this.Config.Timestamp)
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+ if len(this.Config.Cover) > 0 {
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+ meta = meta + `<meta name="cover" content="cover"/>`
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+ guide = `<reference href="titlepage.xhtml" title="Cover" type="cover"/>`
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+ manifest = fmt.Sprintf(`<item href="%v" id="cover" media-type="%v"/>`, this.Config.Cover, GetMediaType(filepath.Ext(this.Config.Cover)))
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+ spineArr = append(spineArr, `<itemref idref="titlepage"/>`)
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+ }
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+
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+ if _, err := os.Stat(this.BasePath + "/summary.html"); err == nil {
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+ spineArr = append(spineArr, `<itemref idref="summary"/>`) //目录
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+
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+ }
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+
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+ //扫描所有文件
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+ if files, err := filetil.ScanFiles(this.BasePath); err == nil {
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+ basePath := strings.Replace(this.BasePath, "\\", "/", -1)
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+ for _, file := range files {
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+ if !file.IsDir {
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+ ext := strings.ToLower(filepath.Ext(file.Path))
|
|
|
+ sourcefile := strings.TrimPrefix(file.Path, basePath+"/")
|
|
|
+ id := "ncx"
|
|
|
+ if ext != ".ncx" {
|
|
|
+ if file.Name == "titlepage.xhtml" { //封面
|
|
|
+ id = "titlepage"
|
|
|
+ } else if file.Name == "summary.html" { //目录
|
|
|
+ id = "summary"
|
|
|
+ } else {
|
|
|
+ id = cryptil.Md5Crypt(sourcefile)
|
|
|
+ }
|
|
|
+ }
|
|
|
+ if mt := GetMediaType(ext); mt != "" { //不是封面图片，且media-type不为空
|
|
|
+ if sourcefile != strings.TrimLeft(this.Config.Cover, "./") { //不是封面图片，则追加进来。封面图片前面已经追加进来了
|
|
|
+ manifestArr = append(manifestArr, fmt.Sprintf(`<item href="%v" id="%v" media-type="%v"/>`, sourcefile, id, mt))
|
|
|
+ }
|
|
|
+ }
|
|
|
+ }
|
|
|
+ }
|
|
|
+
|
|
|
+ items := make(map[string]string)
|
|
|
+ for _, link := range this.Config.Order {
|
|
|
+ id := cryptil.Md5Crypt(link)
|
|
|
+ if _, ok := items[id]; !ok { //去重
|
|
|
+ items[id] = id
|
|
|
+ spineArr = append(spineArr, fmt.Sprintf(`<itemref idref="%v"/>`, id))
|
|
|
+ }
|
|
|
+ }
|
|
|
+ manifest = manifest + strings.Join(manifestArr, "\n")
|
|
|
+ spine = strings.Join(spineArr, "\n")
|
|
|
+ } else {
|
|
|
+ return err
|
|
|
+ }
|
|
|
+
|
|
|
+ pkg := `<?xml version='1.0' encoding='` + this.Config.Charset + `'?>
|
|
|
+ <package xmlns="http://www.idpf.org/2007/opf" unique-identifier="uuid_id" version="2.0">
|
|
|
+ <metadata xmlns:opf="http://www.idpf.org/2007/opf" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:dcterms="http://purl.org/dc/terms/" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:calibre="http://calibre.kovidgoyal.net/2009/metadata">
|
|
|
+ %v
|
|
|
+ </metadata>
|
|
|
+ <manifest>
|
|
|
+ %v
|
|
|
+ </manifest>
|
|
|
+ <spine toc="ncx">
|
|
|
+ %v
|
|
|
+ </spine>
|
|
|
+ %v
|
|
|
+ </package>
|
|
|
+ `
|
|
|
+ if len(guide) > 0 {
|
|
|
+ guide = `<guide>` + guide + `</guide>`
|
|
|
+ }
|
|
|
+ pkg = fmt.Sprintf(pkg, meta, manifest, spine, guide)
|
|
|
+ return ioutil.WriteFile(this.BasePath+"/content.opf", []byte(pkg), os.ModePerm)
|
|
|
+}
|
|
|
+
|
|
|
+//转成epub
|
|
|
+func (this *Converter) convertToEpub() (err error) {
|
|
|
+ args := []string{
|
|
|
+ this.BasePath + "/content.epub",
|
|
|
+ this.BasePath + "/" + output + "/book.epub",
|
|
|
+ }
|
|
|
+ cmd := exec.Command(ebookConvert, args...)
|
|
|
+
|
|
|
+ if this.Debug {
|
|
|
+ fmt.Println(cmd.Args)
|
|
|
+ }
|
|
|
+ return cmd.Run()
|
|
|
+}
|
|
|
+
|
|
|
+//转成mobi
|
|
|
+func (this *Converter) convertToMobi() (err error) {
|
|
|
+ args := []string{
|
|
|
+ this.BasePath + "/content.epub",
|
|
|
+ this.BasePath + "/" + output + "/book.mobi",
|
|
|
+ }
|
|
|
+ cmd := exec.Command(ebookConvert, args...)
|
|
|
+ if this.Debug {
|
|
|
+ fmt.Println(cmd.Args)
|
|
|
+ }
|
|
|
+
|
|
|
+ return cmd.Run()
|
|
|
+}
|
|
|
+
|
|
|
+//转成pdf
|
|
|
+func (this *Converter) convertToPdf() (err error) {
|
|
|
+ args := []string{
|
|
|
+ this.BasePath + "/content.epub",
|
|
|
+ this.BasePath + "/" + output + "/book.pdf",
|
|
|
+ }
|
|
|
+ //页面大小
|
|
|
+ if len(this.Config.PaperSize) > 0 {
|
|
|
+ args = append(args, "--paper-size", this.Config.PaperSize)
|
|
|
+ }
|
|
|
+ //文字大小
|
|
|
+ if len(this.Config.FontSize) > 0 {
|
|
|
+ args = append(args, "--pdf-default-font-size", this.Config.FontSize)
|
|
|
+ }
|
|
|
+
|
|
|
+ //header template
|
|
|
+ if len(this.Config.Header) > 0 {
|
|
|
+ args = append(args, "--pdf-header-template", this.Config.Header)
|
|
|
+ }
|
|
|
+
|
|
|
+ //footer template
|
|
|
+ if len(this.Config.Footer) > 0 {
|
|
|
+ args = append(args, "--pdf-footer-template", this.Config.Footer)
|
|
|
+ }
|
|
|
+
|
|
|
+ if len(this.Config.MarginLeft) > 0 {
|
|
|
+ args = append(args, "--pdf-page-margin-left", this.Config.MarginLeft)
|
|
|
+ }
|
|
|
+ if len(this.Config.MarginTop) > 0 {
|
|
|
+ args = append(args, "--pdf-page-margin-top", this.Config.MarginTop)
|
|
|
+ }
|
|
|
+ if len(this.Config.MarginRight) > 0 {
|
|
|
+ args = append(args, "--pdf-page-margin-right", this.Config.MarginRight)
|
|
|
+ }
|
|
|
+ if len(this.Config.MarginBottom) > 0 {
|
|
|
+ args = append(args, "--pdf-page-margin-bottom", this.Config.MarginBottom)
|
|
|
+ }
|
|
|
+
|
|
|
+ //更多选项
|
|
|
+ if len(this.Config.More) > 0 {
|
|
|
+ args = append(args, this.Config.More...)
|
|
|
+ }
|
|
|
+
|
|
|
+ cmd := exec.Command(ebookConvert, args...)
|
|
|
+ if this.Debug {
|
|
|
+ fmt.Println(cmd.Args)
|
|
|
+ }
|
|
|
+ return cmd.Run()
|
|
|
+}
|
Minho