first init

README.md

@@ -1,2 +1,16 @@
 # go-enex
-evernote .enex file parser
+evernote .enex file parser in go
+
+## Example
+
+## TODO
++ [ ] en-crypt
++ [ ] en-todo
++ [ ] en-media
+
+## Refer
++ [evernote2md](https://github.com/wormi4ok/evernote2md/blob/master/encoding/enex/enex.go)
++ [go-enex](https://github.com/macrat/go-enex)
++ http://xml.evernote.com/pub/enml2.dtd
++ http://xml.evernote.com/pub/evernote-export2.dtd
+

enex.go

@@ -0,0 +1,126 @@
+package enex
+
+import (
+	"bytes"
+	"encoding/xml"
+	"errors"
+	"fmt"
+	"io"
+	"regexp"
+)
+
+type (
+	// Export represents Evernote enex file structure
+	Export struct {
+		XMLName xml.Name `xml:"en-export"`
+		Date    string   `xml:"export-date,attr"`
+		Notes   []Note   `xml:"note"`
+	}
+
+	// Note is one note in Evernote
+	Note struct {
+		XMLName    xml.Name       `xml:"note"`
+		Title      string         `xml:"title"`
+		Content    []byte         `xml:"content"`
+		Updated    string         `xml:"updated"`
+		Created    string         `xml:"created"`
+		Tags       []string       `xml:"tag"`
+		Attributes NoteAttributes `xml:"note-attributes"`
+		Resources  []Resource     `xml:"resource"`
+	}
+
+	// NoteAttributes contain the note metadata
+	NoteAttributes struct {
+		Source            string `xml:"source"`
+		SourceApplication string `xml:"source-application"`
+		Latitude          string `xml:"latitude"`
+		Longitude         string `xml:"longitude"`
+		Altitude          string `xml:"altitude"`
+		Author            string `xml:"author"`
+		SourceUrl         string `xml:"source-url"`
+	}
+
+	// Resource embedded in the note
+	Resource struct {
+		ID          string
+		Type        string
+		Data        Data       `xml:"data"`
+		Mime        string     `xml:"mime"`
+		Width       int        `xml:"width"`
+		Height      int        `xml:"height"`
+		Attributes  Attributes `xml:"resource-attributes"`
+		Recognition []byte     `xml:"recognition"`
+	}
+
+	// Attributes of the resource
+	Attributes struct {
+		Timestamp string `xml:"timestamp"`
+		Filename  string `xml:"file-name"`
+		SourceUrl string `xml:"source-url"`
+	}
+	// Recognition for the resource
+	Recognition struct {
+		XMLName xml.Name `xml:"recoIndex"`
+		ObjID   string   `xml:"objID,attr"`
+		ObjType string   `xml:"objType,attr"`
+	}
+
+	// Data object in base64
+	Data struct {
+		XMLName  xml.Name `xml:"data"`
+		Encoding string   `xml:"encoding,attr"`
+		Content  []byte   `xml:",innerxml"`
+	}
+
+	// Content of Evernote Notes
+	Content struct {
+		Text []byte `xml:",innerxml"`
+	}
+)
+
+var hashRe = regexp.MustCompile(`\b[0-9a-f]{32}\b`)
+
+// Decode will return an Export from evernote
+func Decode(data io.Reader) (*Export, error) {
+	var e Export
+	err := newDecoder(data).Decode(&e)
+
+	for i := range e.Notes {
+		var c Content
+		var reader = bytes.NewReader(e.Notes[i].Content)
+
+		if err := newDecoder(reader).Decode(&c); err != nil {
+			// EOF is a known case when the content is empty
+			if !errors.Is(err, io.EOF) {
+				return nil, fmt.Errorf("decoding note %s: %w", e.Notes[i].Title, err)
+			}
+		}
+		e.Notes[i].Content = c.Text
+
+		for j := range e.Notes[i].Resources {
+			if res := e.Notes[i].Resources[j]; len(res.Recognition) == 0 {
+				hash := hashRe.FindString(res.Attributes.SourceUrl)
+				if len(hash) > 0 {
+					e.Notes[i].Resources[j].ID = hash
+				}
+				continue
+			}
+			var rec Recognition
+			decoder := newDecoder(bytes.NewReader(e.Notes[i].Resources[j].Recognition))
+			err = decoder.Decode(&rec)
+			if err != nil {
+				return nil, fmt.Errorf("decoding resource %s: %w", e.Notes[i].Resources[j].Attributes.Filename, err)
+			}
+			e.Notes[i].Resources[j].ID = rec.ObjID
+			e.Notes[i].Resources[j].Type = rec.ObjType
+		}
+	}
+
+	return &e, err
+}
+
+func newDecoder(r io.Reader) *xml.Decoder {
+	d := xml.NewDecoder(r)
+	d.Strict = false
+	return d
+}

go.mod

@@ -0,0 +1,3 @@
+module github.com/czyt/enex
+
+go 1.19

testdata/en-crypt.enex

@@ -0,0 +1,7 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE en-export SYSTEM "http://xml.evernote.com/pub/evernote-export2.dtd">
+<en-export export-date="20220920T151222Z" application="Evernote/Windows" version="6.x">
+<note><title>crypt data pwd:aaa</title><content><![CDATA[<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE en-note SYSTEM "http://xml.evernote.com/pub/enml2.dtd">
+
+<en-note><div><en-crypt cipher="AES" hint="a*3" length="128">RU5DMFgHgS6gkVaOVGvh9k48uCHyn1E0Md1xRGpoC+w5TPYu6MYWYn4+jkxA4K2oIM5oM5S9pwsdgfv7RdNgR3BmtMecYrrrcbW+RtMRI3NVppPo0rPrhygAFUPQDWk/FrhrXA==</en-crypt><br/></div><div><br/></div></en-note>]]></content><created>20220920T151143Z</created><updated>20220920T151208Z</updated><note-attributes><author>虫子樱桃</author><source>desktop.win</source><source-application>evernote.win32</source-application></note-attributes></note></en-export>

testdata/todolist.enex

@@ -0,0 +1,7 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE en-export SYSTEM "http://xml.evernote.com/pub/evernote-export2.dtd">
+<en-export export-date="20220920T151621Z" application="Evernote/Windows" version="6.x">
+<note><title>todolist</title><content><![CDATA[<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE en-note SYSTEM "http://xml.evernote.com/pub/enml2.dtd">
+
+<en-note><div><en-todo checked="false"/>todo1<br/></div><div><en-todo checked="false"/>todo2</div></en-note>]]></content><created>20220920T151555Z</created><updated>20220920T151609Z</updated><note-attributes><author>虫子樱桃</author><source>desktop.win</source><source-application>evernote.win32</source-application></note-attributes></note></en-export>