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fix(CuuTruyen): rewrite dead image hosts, fix DRM decode & add API he… #440

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b5cad1b
fix(CuuTruyen): rewrite dead image hosts, fix DRM decode & add API he…
thefirst632student Aug 25, 2026
4ca0a9f
Refactor intercept method to use storageHostInterceptor
thefirst632student Aug 26, 2026
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58 changes: 43 additions & 15 deletions src/main/kotlin/tsuki/site/vi/CuuTruyenParser.kt
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Original file line number Diff line number Diff line change
Expand Up @@ -161,8 +161,8 @@ internal class CuuTruyenParser(context: MangaLoaderContext) :
publicUrl = "https://$domain/mangas/${jo.getLong("id")}",
title = jo.getString("name"),
altTitles = emptySet(),
coverUrl = if (server == MOBILE_COVER) jo.getString(MOBILE_COVER)
else jo.getString(DESKTOP_COVER),
coverUrl = if (server == MOBILE_COVER) jo.getString(MOBILE_COVER).fixStorageHost()
else jo.getString(DESKTOP_COVER).fixStorageHost(),
largeCoverUrl = null,
authors = setOfNotNull(author),
tags = emptySet(),
Expand Down Expand Up @@ -232,8 +232,8 @@ internal class CuuTruyenParser(context: MangaLoaderContext) :
source = source,
)
},
largeCoverUrl = if (server == MOBILE_COVER) json.getString(MOBILE_PANORAMA)
else json.getString(DESKTOP_PANORAMA),
largeCoverUrl = if (server == MOBILE_COVER) json.getString(MOBILE_PANORAMA).fixStorageHost()
else json.getString(DESKTOP_PANORAMA).fixStorageHost(),
)
}

Expand All @@ -242,9 +242,9 @@ internal class CuuTruyenParser(context: MangaLoaderContext) :
val json = webClient.httpGet(url).parseJson().getJSONObject("data")

return json.getJSONArray("pages").mapJSON { jo ->
val imageUrl = jo.getString("image_url").toHttpUrl().newBuilder()
val imageUrl = jo.getString("image_url").fixStorageHost().toHttpUrl().newBuilder()
val id = jo.getLong("id")
val drm = jo.getStringOrNull("drm_data")
val drm = jo.getStringOrNull("drm_data")?.filterNot { it.isWhitespace() }
if (!drm.isNullOrEmpty()) {
imageUrl.fragment(DRM_DATA_KEY + drm)
}
Expand All @@ -257,18 +257,41 @@ internal class CuuTruyenParser(context: MangaLoaderContext) :
}
}

override fun intercept(chain: Interceptor.Chain): Response {
val response = chain.proceed(chain.request())
val fragment = response.request.url.fragment

if (fragment == null || !fragment.contains(DRM_DATA_KEY)) {
return response
private fun String.fixStorageHost(): String {
var result = this
for ((from, to) in STORAGE_HOST_FALLBACK) {
result = result.replace(from, to)
}
return result
}

return context.redrawImageResponse(response) { bitmap ->
val drmData = fragment.substringAfter(DRM_DATA_KEY)
unscrambleImage(bitmap, drmData)
private fun storageHostInterceptor(chain: Interceptor.Chain): Response {
var request = chain.request()
STORAGE_HOST_FALLBACK[request.url.host]?.let { host ->
request = request.newBuilder()
.url(request.url.newBuilder().host(host).build())
.build()
}
if (request.url.encodedPath.startsWith("/api/")) {
request = request.newBuilder()
.header("Cuutruyen-Client", CLIENT_HEADER)
.build()
}
return chain.proceed(request)
}

override fun intercept(chain: Interceptor.Chain): Response {
val response = storageHostInterceptor(chain)
val fragment = response.request.url.fragment

if (fragment == null || !fragment.contains(DRM_DATA_KEY)) {
return response
}

return context.redrawImageResponse(response) { bitmap ->
val drmData = fragment.substringAfter(DRM_DATA_KEY)
unscrambleImage(bitmap, drmData)
}
}

private fun unscrambleImage(bitmap: Bitmap, drmData: String): Bitmap {
Expand Down Expand Up @@ -448,9 +471,14 @@ internal class CuuTruyenParser(context: MangaLoaderContext) :
private companion object {
const val DRM_DATA_KEY = "drm_data="
const val DECRYPTION_KEY = "3141592653589793"
const val CLIENT_HEADER = "OfficialWebApp-20250805"
const val MOBILE_COVER = "cover_mobile_url"
const val MOBILE_PANORAMA = "panorama_mobile_url"
const val DESKTOP_COVER = "cover_url"
const val DESKTOP_PANORAMA = "panorama_url"
val STORAGE_HOST_FALLBACK = mapOf(
"storage-ct.lrclib.net" to "storage-bravo.cuutruyen.net",
"storage-ct-riften.site" to "storage-charlie.cuutruyen.net",
)
}
}
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