fix(en/uhdmovies): Fix episode list & video extractor (#2604)

src/en/uhdmovies/build.gradle

@@ -1,12 +1,14 @@
-apply plugin: 'com.android.application'
-apply plugin: 'kotlin-android'
-apply plugin: 'kotlinx-serialization'
+plugins {
+    alias(libs.plugins.android.application)
+    alias(libs.plugins.kotlin.android)
+    alias(libs.plugins.kotlin.serialization)
+}
 
 ext {
     extName = 'UHD Movies'
     pkgNameSuffix = 'en.uhdmovies'
     extClass = '.UHDMovies'
-    extVersionCode = 17
+    extVersionCode = 18
     libVersion = '13'
 }
 

src/en/uhdmovies/src/eu/kanade/tachiyomi/animeextension/en/uhdmovies/RedirectorBypasser.kt

@@ -0,0 +1,65 @@
+package eu.kanade.tachiyomi.animeextension.en.uhdmovies
+
+import eu.kanade.tachiyomi.network.GET
+import eu.kanade.tachiyomi.network.POST
+import eu.kanade.tachiyomi.util.asJsoup
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.runBlocking
+import kotlinx.coroutines.sync.Mutex
+import kotlinx.coroutines.sync.withLock
+import okhttp3.Cookie
+import okhttp3.FormBody
+import okhttp3.Headers
+import okhttp3.HttpUrl.Companion.toHttpUrlOrNull
+import okhttp3.OkHttpClient
+import org.jsoup.nodes.Document
+
+class RedirectorBypasser(private val client: OkHttpClient, private val headers: Headers) {
+    fun bypass(url: String): String? {
+        val lastDoc = client.newCall(GET(url, headers)).execute()
+            .use { recursiveDoc(it.asJsoup()) }
+
+        val script = lastDoc.selectFirst("script:containsData(/?go=):containsData(href)")
+            ?.data()
+            ?: return null
+
+        val nextUrl = script.substringAfter("\"href\",\"").substringBefore('"')
+        val httpUrl = nextUrl.toHttpUrlOrNull() ?: return null
+        val cookieName = httpUrl.queryParameter("go") ?: return null
+        val cookieValue = script.substringAfter("'$cookieName', '").substringBefore("'")
+        val cookie = Cookie.parse(httpUrl, "$cookieName=$cookieValue")!!
+        val headers = headers.newBuilder().set("referer", lastDoc.location()).build()
+
+        val doc = runBlocking(Dispatchers.IO) {
+            MUTEX.withLock { // Mutex to prevent overwriting cookies from parallel requests
+                client.cookieJar.saveFromResponse(httpUrl, listOf(cookie))
+                client.newCall(GET(nextUrl, headers)).execute().use { it.asJsoup() }
+            }
+        }
+
+        return doc.selectFirst("meta[http-equiv]")?.attr("content")
+            ?.substringAfter("url=")
+    }
+
+    private fun recursiveDoc(doc: Document): Document {
+        val form = doc.selectFirst("form#landing") ?: return doc
+        val url = form.attr("action")
+        val body = FormBody.Builder().apply {
+            form.select("input").forEach {
+                add(it.attr("name"), it.attr("value"))
+            }
+        }.build()
+
+        val headers = headers.newBuilder()
+            .set("referer", doc.location())
+            .build()
+
+        return client.newCall(POST(url, headers, body)).execute().use {
+            recursiveDoc(it.asJsoup())
+        }
+    }
+
+    companion object {
+        private val MUTEX by lazy { Mutex() }
+    }
+}