85af4c5f97
* fix: Fix http 403 - Bypass JS Challenge * chore: Bump version * refactor: Apply suggestion - Explicitly close response * refactor: Apply suggestion - add tailrec modifier * fix: Prevent future headaches - Use the same delay as the challenge * fix: Apply suggestion - Prevent throwing without closing response
56 lines
2.0 KiB
Kotlin
56 lines
2.0 KiB
Kotlin
package eu.kanade.tachiyomi.extension.en.ascalonscans
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import eu.kanade.tachiyomi.multisrc.mangathemesia.MangaThemesia
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import eu.kanade.tachiyomi.network.GET
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import eu.kanade.tachiyomi.network.POST
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import eu.kanade.tachiyomi.network.interceptor.rateLimitHost
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import okhttp3.FormBody
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import okhttp3.HttpUrl.Companion.toHttpUrl
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import okhttp3.Interceptor
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import okhttp3.Response
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import java.io.IOException
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import java.security.MessageDigest
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class AscalonScans : MangaThemesia("AscalonScans", "https://ascalonscans.com", "en") {
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override val client = super.client.newBuilder()
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.rateLimitHost(baseUrl.toHttpUrl(), 2)
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.addInterceptor(::jsChallengeInterceptor)
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.build()
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private fun jsChallengeInterceptor(chain: Interceptor.Chain): Response {
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val request = chain.request()
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val origRes = chain.proceed(request)
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if (origRes.code != 403) return origRes
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origRes.close()
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// Same delay as the source
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Thread.sleep(3000L)
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val token = fetchToken(chain).sha256()
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val body = FormBody.Builder().add("challenge", token).build()
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val challengeReq = POST("$baseUrl/hcdn-cgi/jschallenge-validate", headers, body = body)
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val challengeResponse = chain.proceed(challengeReq)
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challengeResponse.close()
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if (challengeResponse.code != 200) throw IOException("Failed to bypass js challenge!")
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return chain.proceed(request)
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}
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private tailrec fun fetchToken(chain: Interceptor.Chain, attempt: Int = 0): String {
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if (attempt > 5) throw IOException("Failed to fetch challenge token!")
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val request = GET("$baseUrl/hcdn-cgi/jschallenge", headers)
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val res = chain.proceed(request).body.string()
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return res.substringAfter("cjs = '").substringBefore("'")
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.takeUnless { it == "nil" } ?: fetchToken(chain, attempt + 1)
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}
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private fun String.sha256(): String {
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return MessageDigest
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.getInstance("SHA-256")
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.digest(toByteArray())
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.fold("", { str, it -> str + "%02x".format(it) })
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}
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}
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