kinoking cloudflare fix (#886)

src/de/kinoking/build.gradle

@@ -6,7 +6,7 @@ ext {
     extName = 'Kinoking'
     pkgNameSuffix = 'de.kinoking'
     extClass = '.Kinoking'
-    extVersionCode = 2
+    extVersionCode = 3
     libVersion = '13'
 }
 

src/de/kinoking/src/eu/kanade/tachiyomi/animeextension/de/kinoking/CloudflareInterceptor.kt

@@ -0,0 +1,88 @@
+package eu.kanade.tachiyomi.animeextension.de.kinoking
+
+import android.annotation.SuppressLint
+import android.app.Application
+import android.os.Handler
+import android.os.Looper
+import android.webkit.WebResourceRequest
+import android.webkit.WebResourceResponse
+import android.webkit.WebView
+import android.webkit.WebViewClient
+import eu.kanade.tachiyomi.network.GET
+import okhttp3.Headers.Companion.toHeaders
+import okhttp3.Interceptor
+import okhttp3.Request
+import okhttp3.Response
+import uy.kohesive.injekt.Injekt
+import uy.kohesive.injekt.api.get
+import java.util.concurrent.CountDownLatch
+import java.util.concurrent.TimeUnit
+
+class CloudflareInterceptor : Interceptor {
+
+    private val context = Injekt.get<Application>()
+    private val handler by lazy { Handler(Looper.getMainLooper()) }
+
+    override fun intercept(chain: Interceptor.Chain): Response {
+        val originalRequest = chain.request()
+
+        val newRequest = resolveWithWebView(originalRequest) ?: throw Exception("bruh")
+
+        return chain.proceed(newRequest)
+    }
+
+    @SuppressLint("SetJavaScriptEnabled")
+    private fun resolveWithWebView(request: Request): Request? {
+        // We need to lock this thread until the WebView finds the challenge solution url, because
+        // OkHttp doesn't support asynchronous interceptors.
+        val latch = CountDownLatch(1)
+
+        var webView: WebView? = null
+
+        val origRequestUrl = request.url.toString()
+        val headers = request.headers.toMultimap().mapValues { it.value.getOrNull(0) ?: "" }.toMutableMap()
+
+        var newRequest: Request? = null
+
+        handler.post {
+            val webview = WebView(context)
+            webView = webview
+            with(webview.settings) {
+                javaScriptEnabled = true
+                domStorageEnabled = true
+                databaseEnabled = true
+                useWideViewPort = false
+                loadWithOverviewMode = false
+                userAgentString = request.header("User-Agent")
+                    ?: "\"Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/88.0.4324.150 Safari/537.36 Edg/88.0.705.63\""
+            }
+
+            webview.webViewClient = object : WebViewClient() {
+                override fun shouldInterceptRequest(
+                    view: WebView,
+                    request: WebResourceRequest,
+                ): WebResourceResponse? {
+                    if (request.url.toString().contains("https://kinoking.cc/")) {
+                        newRequest = GET(request.url.toString(), request.requestHeaders.toHeaders())
+                        latch.countDown()
+                    }
+                    return super.shouldInterceptRequest(view, request)
+                }
+            }
+
+            webView?.loadUrl(origRequestUrl, headers)
+        }
+
+        // Wait a reasonable amount of time to retrieve the solution. The minimum should be
+        // around 4 seconds but it can take more due to slow networks or server issues.
+        latch.await(12, TimeUnit.SECONDS)
+
+        handler.post {
+            webView?.stopLoading()
+            webView?.destroy()
+            webView = null
+        }
+
+        return newRequest
+    }
+}

src/de/kinoking/src/eu/kanade/tachiyomi/animeextension/de/kinoking/Kinoking.kt

@@ -47,7 +47,11 @@ class Kinoking : ConfigurableAnimeSource, ParsedAnimeHttpSource() {
 
     override fun popularAnimeSelector(): String = "#featured-titles article.item"
 
-    override fun popularAnimeRequest(page: Int): Request = GET(baseUrl, headers = Headers.headersOf("if-modified-since", ""))
+    override fun popularAnimeRequest(page: Int): Request {
+        val interceptor = client.newBuilder().addInterceptor(CloudflareInterceptor()).build()
+        val headers = interceptor.newCall(GET(baseUrl)).execute().request.headers
+        return GET(baseUrl, headers = headers)
+    }
 
     override fun popularAnimeFromElement(element: Element): SAnime {
         val anime = SAnime.create()