https://github.com/marcelmay/lib-mobi

A simple lib for reading ebook MOBI/AZW3 header data in Java.
https://github.com/marcelmay/lib-mobi

azw3 ebook java mobi

Last synced: 9 months ago
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A simple lib for reading ebook MOBI/AZW3 header data in Java.

Host: GitHub
URL: https://github.com/marcelmay/lib-mobi
Owner: marcelmay
License: apache-2.0
Created: 2016-01-08T11:32:58.000Z (over 10 years ago)
Default Branch: master
Last Pushed: 2025-08-29T02:35:57.000Z (10 months ago)
Last Synced: 2025-08-29T06:46:01.110Z (10 months ago)
Topics: azw3, ebook, java, mobi
Language: Java
Homepage:
Size: 10.6 MB
Stars: 6
Watchers: 2
Forks: 1
Open Issues: 0
Metadata Files:
- Readme: README.md
- License: LICENSE

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README

libmobi
=======================================
[![Maven Central](https://img.shields.io/maven-central/v/de.m3y.libmobi/libmobi-core)](https://search.maven.org/search?q=g:de.m3y.libmobi) [![Apache License, Version 2.0, January 2004](https://img.shields.io/github/license/apache/maven.svg?label=License)](LICENSE)

A simple lib for reading MOBI header data in Java.

The example standalone runner extracts a MOBI - or AZW3 - header and prints it as JSON.

Example (see [MobiHeaderTest](core/src/test/java/de/m3y/mobi/core/MobiHeaderTest.java) class)
----------------------------------

```java
try (final DataInputStream is = ...) { // Open stream for MOBI file
final MobiHeader header = MobiHeader.read(is);

System.out.println("ISBN: " +
header.exthHeader.getRecordByTypeCode(MobiHeader.Exth.RecordType.ISBN).data);
System.out.println("Language: " +
header.exthHeader.getRecordByTypeCode(MobiHeader.Exth.RecordType.LANGUAGE).data);
}
```

Standalone runner
-----------------
Extracts the MOBI header data and prints it JSON formatted.

```bash
java -jar standalone/target/libmobi-standalone-1.0-SNAPSHOT.jar my_book.mobi
```

How to build
-----

* Build from source

`mvn clean install`

Make sure you got [Maven 3.6+][maven_download] and JDK 1.8+ .

[maven_download]: http://maven.apache.org

Example output from standalone runner
------

```bash
java -jar standalone/target/libmobi-standalone-1.0.jar ./core/src/test/resources/progit-en.984.mobi
```
```json
{
"MobiHeader" : {
"palmDatabaseHeader" : {
"name" : "Pro_Git",
"attributes" : 0,
"version" : 0,
"creationDate" : 1452046139000,
"modificationDate" : 1452046149000,
"nextRecordListId" : 0,
"modificationNumber" : 0,
"lastBackupDate" : 0,
"appInfoId" : 0,
"sortInfoId" : 0,
"type" : "BOOK",
"creator" : "MOBI",
"uniqueIdSeed" : 2353,
"numRecords" : 1176
},
"compression" : "OLD_MOBIPOCKET_COMPRESSION",
"textLength" : 1373193,
"recordCount" : 336,
"recordSize" : 4096,
"encryptionType" : 0,
"identifier" : "MOBI",
"headerLength" : 264,
"mobiType" : "MOBIPOCKET_BOOK",
"encoding" : "UTF-8",
"uniqueId" : -492220346,
"fileVersion" : 6,
"ortographicIndex" : -1,
"inflectionIndex" : -1,
"indexNames" : -1,
"indexKeys" : -1,
"extraIndex" : [ -1, -1, -1, -1, -1, -1 ],
"firstNonBookIndex" : 337,
"fullNameOffset" : 616,
"fullNameLength" : 7,
"locale" : 9,
"inputLanguage" : 0,
"outputLanguage" : 0,
"minVersion" : 6,
"firstImageIndex" : 340,
"huffmanRecordOffset" : 0,
"huffmanRecordCount" : 0,
"huffmanTableOffset" : 0,
"huffmanTableLength" : 0,
"hasExth" : true,
"exthHeader" : {
"identifier" : "EXTH",
"headerLength" : 336,
"recordCount" : 18,
"records" : [ {
"typeCode" : 116,
"typeLabel" : "START_READING",
"length" : 12,
"data" : "\u0000\u0000\u0000("
}, {
"typeCode" : 542,
"typeLabel" : "UNKNOWN_BUT_CHANGES_WITH_FILE_NAME",
"length" : 12,
"data" : "ExGK"
}, {
"typeCode" : 524,
"typeLabel" : "LANGUAGE",
"length" : 10,
"data" : "en"
}, {
"typeCode" : 525,
"typeLabel" : "ALIGNMENT",
"length" : 21,
"data" : "horizontal-lr"
}, {
"typeCode" : 129,
"typeLabel" : "KF8_COVER_URI",
"length" : 25,
"data" : "kindle:embed:0069"
}, {
"typeCode" : 131,
"typeLabel" : "UNKNOWN",
"length" : 12,
"data" : "\u0000\u0000\u0000\uFFFD"
}, {
"typeCode" : 300,
"typeLabel" : "FONT_SIGNATURE",
"length" : 78,
"data" : "\u0007\u0000\u0000\u0000\uFFFD(\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\uFFFD\u0000 \u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\uFFFD\uFFFD\uFFFD\u0001\uFFFD\u0002\uFFFD@\uFFFD@\uFFFD@\uFFFD@\uFFFD@\uFFFD@\uFFFD@\uFFFDB\uFFFDC\uFFFDF\uFFFDJ\uFFFDJ\uFFFDJ\uFFFDJ\uFFFDK\uFFFD"
}, {
"typeCode" : 204,
"typeLabel" : "CREATOR_SOFTWARE_RECORDS",
"length" : 12,
"data" : "\u0000\u0000\u0000\uFFFD"
}, {
"typeCode" : 205,
"typeLabel" : "CREATOR_MAJOR_VERSION",
"length" : 12,
"data" : "\u0000\u0000\u0000\u0002"
}, {
"typeCode" : 206,
"typeLabel" : "CREATOR_MINOR_VERSION",
"length" : 12,
"data" : "\u0000\u0000\u0000\t"
}, {
"typeCode" : 535,
"typeLabel" : "KINDLEGEN_BUILDREV_NUMBER",
"length" : 20,
"data" : "0730-890adc2"
}, {
"typeCode" : 207,
"typeLabel" : "CREATOR_BUILD_NUMBER",
"length" : 12,
"data" : "\u0000\u0000\u0000\u0000"
}, {
"typeCode" : 125,
"typeLabel" : "COUNT_OF_RESOURCES",
"length" : 12,
"data" : "\u0000\u0000\u0000\uFFFD"
}, {
"typeCode" : 201,
"typeLabel" : "COVER_OFFSET",
"length" : 12,
"data" : "\u0000\u0000\u0000\u0000"
}, {
"typeCode" : 203,
"typeLabel" : "HAS_FAKE_COVER",
"length" : 12,
"data" : "\u0000\u0000\u0000\u0000"
}, {
"typeCode" : 202,
"typeLabel" : "THUMB_OFFSET",
"length" : 12,
"data" : "\u0000\u0000\u0000\uFFFD"
}, {
"typeCode" : 121,
"typeLabel" : "KF8_BOUNDARY_OFFSET",
"length" : 12,
"data" : "\u0000\u0000\u0002#"
}, {
"typeCode" : 536,
"typeLabel" : "CONTAINER_INFO",
"length" : 24,
"data" : "2400x3840:0-202|"
} ]
}
}
}
```

Misc
------
Licensed under [Apache 2.0](http://www.apache.org/licenses/LICENSE-2.0.txt)

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