53 lines
2.1 KiB
Kotlin
53 lines
2.1 KiB
Kotlin
package eu.kanade.tachiyomi.extension.vi.ocumeo
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import eu.kanade.tachiyomi.multisrc.a3manga.A3Manga
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import eu.kanade.tachiyomi.source.model.Page
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import org.jsoup.Jsoup
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import org.jsoup.nodes.Document
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class OCuMeo : A3Manga("Ổ Cú Mèo", "https://www.ocumoe.com", "vi") {
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override fun pageListParse(document: Document): List<Page> {
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val imgListHtml = decodeImgList(document)
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return Jsoup.parseBodyFragment(imgListHtml).select("img").mapIndexed { idx, element ->
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val encryptedUrl = element.attributes().find { it.key.startsWith("data") }?.value
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Page(idx, imageUrl = encryptedUrl?.decodeUrl())
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}
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}
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private fun String.decodeUrl(): String {
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// We expect the URL to start with `https://`, where the last 3 characters are encoded.
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// The length of the encoded character is not known, but it is the same across all.
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// Essentially we are looking for the two encoded slashes, which tells us the length.
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val patternIdx = patternsLengthCheck.indexOfFirst { pattern ->
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val matchResult = pattern.find(this)
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val g1 = matchResult?.groupValues?.get(1)
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val g2 = matchResult?.groupValues?.get(2)
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g1 == g2 && g1 != null
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}
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if (patternIdx == -1) {
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throw Exception("Failed to decrypt URL")
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}
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// With a known length we can predict all the encoded characters.
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// This is a slightly more expensive pattern, hence the separation.
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val matchResult = patternsSubstitution[patternIdx].find(this)
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return matchResult?.destructured?.let { (colon, slash, period) ->
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this
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.replace(colon, ":")
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.replace(slash, "/")
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.replace(period, ".")
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} ?: throw Exception("Failed to reconstruct URL")
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}
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companion object {
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private val patternsLengthCheck: List<Regex> = (20 downTo 1).map { i ->
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"""^https.{$i}(.{$i})(.{$i})""".toRegex()
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}
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private val patternsSubstitution: List<Regex> = (20 downTo 1).map { i ->
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"""^https(.{$i})(.{$i}).*(.{$i})(?:webp|jpeg|tiff|.{3})$""".toRegex()
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}
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}
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}
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