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Android EPUB 로딩 개선
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RIDI
August 03, 2018
Technology
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Android EPUB 로딩 개선
RIDI
August 03, 2018
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Transcript
Android EPUB ۽٬ ѐࢶ ࠭য ষੋ
None
ࢲীࢲ ଼ਸ ҳݒ জীࢲ ۽٘ ੍ח
ࢲীࢲ ଼ਸ ҳݒ জীࢲ ۽٘ ੍ח EPUBী Ѧܽ DRMਸ ೧ઁೞҊ
ਬബೞ ঋ ੌ ա ഛੋೞҊ ୷ ಽҊ ஶబஎ Ҋ द DRM ਊೞҊ ਗࠄ Ҋ …
EPUB ۽٬ җ 1. DRM Ѧ۰ח EPUB ۽٘
EPUB ۽٬ җ 2. EPUBী Ѧ۰ח DRM ೧ઁ
EPUB ۽٬ җ ≈
EPUB ۽٬ җ 3. ୷೧ઁ ߂ ਗࠄ EPUB ઁѢ
EPUB ۽٬ җ 4. ஶబஎ ੌী DRM ਊ
Ӓؘ۠..
DRM ೧ઁ ػ EPUBੌ ੌदਵ۽ ઓ EPUB ୷ ೧ઁ, ঐഐച
স ب ъઁ ઙܐ द ਗࠄੌ ֢
ਗࠄ ੌ Ӓ۽ ࠁৈҊ DRM Ѧܻ ঋ EPUB ࠄޙ
HTML ੌ ӝఋ..
যځೠ ࢚ടীࢲب ঐഐച غ ঋ ੌ ࠁৈઉࢲח উػ
рী ੌ ֢غחѱ ޙઁۄݶ? ਸ ೞ݈!
DRM ೧ઁ ୷ ೧ઁ బஎ DRM ਊ
1. EPUB ੌਸ ೞ ঋҊ ߄۽ ঐഐചೞ ࢎন ӝӝীࢲ ࠛоמೣ
(ࢲ ӝળ о EPUB : 493MB)
=
2. ܴਸ о ࠙ೡ ୷ੌਸ ࢎਊೞ Zip Headerܳ ా೧
ࣽࢲ ਬ୶ оמ 1. DRM ೧ઁೠ EPUB ੌਸ ೞ ঋҊ ߄۽ ঐഐചೞ
1/n 1/n 1/n 1/n j EPUB (n byte)
Sequence InputStream j Input Stream Input Stream Input Stream Input
Stream
3. Zip ੌ ইצ Ӓր ੌਸ ࢎਊೞ ੌ ࢤࢿदрਸ ా೧
ࣽࢲ ਬ୶ оמ 2. ܴਸ о ࠙ೡ ୷ੌਸ ࢎਊೞ 1. DRM ೧ઁೠ EPUB ੌਸ ೞ ঋҊ ߄۽ ঐഐചೞ
1 2 3 … 1 3 2 …
4. Random Access Fileਸ ࢎਊೞ ࢿҕ 3. Zip ੌ ইצ
Ӓր ੌਸ ࢎਊೞ 2. ܴਸ о ࠙ೡ ୷ੌਸ ࢎਊೞ 1. DRM ೧ઁೠ EPUB ੌਸ ೞ ঋҊ ߄۽ ঐഐചೞ
ਵݶ જওѷ݅..
ঐഐച ೡ ੌ ࢶఖ ӝળ ӏधਸ ాೠ DRMਊ
opf ݾ۾ী ח ੌٜਸ ঐഐച
opf ݾ۾ী ח ੌٜਸ ঐഐച ୷ਸ ݢ ಽҊ ঐഐച
೮ӝ ٸޙী opf ࢎਊ оמ ӏधਵ۽ ഛܳ ೧ࢲ ঐഐച e.g. *.html, *.xhtml
୷ਸ ݢ ಽҊ ঐഐച ೮ӝ ٸޙী opf ࢎਊ оמ
-> ਃೠ ੌਸ ই ݢ ୷ਸ ಽ InputStream ZipArchiveInputStream ZipArchiveEntry
ਊ EPUB ܻ opfܳ ాೠ Ѩࢎ ޙઁ
୷ ಽ ٸ݃ opfীࢲ ୶ೠ ݾ۾җ ࠺Ү ݾ۾ ݽٚ ੌਸ
୷ ಽਵݶ աݠח ߄۽ ೯ೞ -> ࠺ ஶబஎ ੌ ݆ EPUB ਊ ఀ
None
୷ਸ ಽݶࢲ زदী ঐഐച Disk I/Oо যٝ
աݠח ߄۽ ୷೧ઁ ਃೠ ੌ݅ ࢶఖೞৈ ঐഐച
PAPER PRO ୭ୡ ۽٬दр 0 150 300 450 600 15MB
50MB 200MB 500MB ߸҃ ߸҃ റ दр (ୡ) 60%
ખ ؊ җਸ উೞѱ উೞҊ ࡅܰѱ!
য় Ѧ যڌѱ ೞ? য় Ѥ যڌѱೞ? য় Ѧ যڌѱ
೮?
Android 3ਘ PAPER 4ਘ PAPER PRO 5ਘ THE END
Q&A