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Commit a098594

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Ushietimschneeb
Ushie
and
timschneeb
authored
feat(twitch): block-embedded-ads patch (#231)
Co-authored-by: Tim Schneeberger <tim.schneeberger@outlook.de>
1 parent 8805851 commit a098594

11 files changed

Lines changed: 290 additions & 1 deletion

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‎app/build.gradle.kts‎

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@@ -46,4 +46,6 @@ dependencies {
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compileOnly(project(mapOf("path" to ":dummy")))
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compileOnly("androidx.annotation:annotation:1.5.0")
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compileOnly("androidx.appcompat:appcompat:1.5.1")
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compileOnly("com.squareup.okhttp3:okhttp:4.10.0")
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compileOnly("com.squareup.retrofit2:retrofit:2.9.0")
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}

‎app/src/main/java/app/revanced/twitch/adblock/IAdblockService.kt‎

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package app.revanced.twitch.adblock
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import okhttp3.Request
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interface IAdblockService {
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fun friendlyName(): String
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fun maxAttempts(): Int
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fun isAvailable(): Boolean
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fun rewriteHlsRequest(originalRequest: Request): Request?
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companion object {
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fun Request.isVod() = url.pathSegments.contains("vod")
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fun Request.channelName() =
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url.pathSegments
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.firstOrNull { it.endsWith(".m3u8") }
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.run { this?.replace(".m3u8", "") }
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}
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}

‎app/src/main/java/app/revanced/twitch/adblock/PurpleAdblockService.kt‎

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package app.revanced.twitch.adblock
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import app.revanced.twitch.adblock.IAdblockService.Companion.channelName
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import app.revanced.twitch.api.RetrofitClient
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import app.revanced.twitch.utils.LogHelper
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import app.revanced.twitch.utils.ReVancedUtils
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import okhttp3.HttpUrl.Companion.toHttpUrlOrNull
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import okhttp3.Request
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import okhttp3.ResponseBody
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class PurpleAdblockService : IAdblockService {
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private val tunnels = mutableMapOf(
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/* tunnel url */ /* alive */
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"https://eu1.jupter.ga" to false,
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"https://eu2.jupter.ga" to false
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)
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override fun friendlyName(): String = ReVancedUtils.getString("revanced_proxy_purpleadblock")
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override fun maxAttempts(): Int = 3
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override fun isAvailable(): Boolean {
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for(tunnel in tunnels.keys) {
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var success = true
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try {
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val response = RetrofitClient.getInstance().purpleAdblockApi.ping(tunnel).execute()
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if (!response.isSuccessful) {
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LogHelper.error("PurpleAdBlock tunnel $tunnel returned an error: HTTP code %d", response.code())
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LogHelper.debug(response.message())
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LogHelper.debug((response.errorBody() as ResponseBody).string())
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success = false
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}
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} catch (ex: Exception) {
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LogHelper.printException("PurpleAdBlock tunnel $tunnel is unavailable", ex)
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success = false
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}
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// Cache availability data
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tunnels[tunnel] = success
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if(success)
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return true
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}
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return false
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}
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override fun rewriteHlsRequest(originalRequest: Request): Request? {
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val server = tunnels.filter { it.value }.map { it.key }.firstOrNull()
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server ?: run {
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LogHelper.error("No tunnels are available")
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return null
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}
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// Compose new URL
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val url = "$server/channel/${originalRequest.channelName()}".toHttpUrlOrNull()
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if (url == null) {
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LogHelper.error("Failed to parse rewritten URL")
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return null
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}
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// Overwrite old request
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return Request.Builder()
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.get()
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.url(url)
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.build()
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}
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}

‎app/src/main/java/app/revanced/twitch/adblock/TTVLolService.kt‎

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package app.revanced.twitch.adblock
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import app.revanced.twitch.adblock.IAdblockService.Companion.channelName
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import app.revanced.twitch.adblock.IAdblockService.Companion.isVod
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import app.revanced.twitch.utils.LogHelper
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import app.revanced.twitch.utils.ReVancedUtils
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import okhttp3.HttpUrl.Companion.toHttpUrlOrNull
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import okhttp3.Request
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import java.util.Random
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class TTVLolService : IAdblockService {
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override fun friendlyName(): String = ReVancedUtils.getString("revanced_proxy_ttv_lol")
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// TTV.lol is sometimes unstable
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override fun maxAttempts(): Int = 4
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override fun isAvailable(): Boolean = true
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override fun rewriteHlsRequest(originalRequest: Request): Request? {
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// Compose new URL
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val url = "https://api.ttv.lol/${if (originalRequest.isVod()) "vod" else "playlist"}/${originalRequest.channelName()}.m3u8${nextQuery()}".toHttpUrlOrNull()
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if (url == null) {
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LogHelper.error("Failed to parse rewritten URL")
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return null
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}
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// Overwrite old request
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return Request.Builder()
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.get()
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.url(url)
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.addHeader("X-Donate-To", "https://ttv.lol/donate")
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.build()
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}
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private fun nextQuery(): String {
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return SAMPLE_QUERY.replace("<SESSION>", generateSessionId())
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}
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private fun generateSessionId() =
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(1..32)
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.map { "abcdef0123456789"[randomSource.nextInt(16)] }
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.joinToString("")
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private val randomSource = Random()
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companion object {
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private const val SAMPLE_QUERY =
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"%3Fallow_source%3Dtrue%26fast_bread%3Dtrue%26allow_audio_only%3Dtrue%26p%3D0%26play_session_id%3D<SESSION>%26player_backend%3Dmediaplayer%26warp%3Dfalse%26force_preroll%3Dfalse%26mobile_cellular%3Dfalse"
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}
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}

‎app/src/main/java/app/revanced/twitch/api/PurpleAdblockApi.java‎

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package app.revanced.twitch.api;
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import okhttp3.ResponseBody;
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import retrofit2.Call;
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import retrofit2.http.GET;
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import retrofit2.http.Url;
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/* only used for service pings */
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public interface PurpleAdblockApi {
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@GET /* root */
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Call<ResponseBody> ping(@Url String baseUrl);
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}

‎app/src/main/java/app/revanced/twitch/api/RequestInterceptor.kt‎

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package app.revanced.twitch.api
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import app.revanced.twitch.adblock.IAdblockService
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import app.revanced.twitch.adblock.IAdblockService.Companion.channelName
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import app.revanced.twitch.adblock.IAdblockService.Companion.isVod
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import app.revanced.twitch.adblock.PurpleAdblockService
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import app.revanced.twitch.adblock.TTVLolService
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import app.revanced.twitch.settings.SettingsEnum
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import app.revanced.twitch.utils.LogHelper
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import app.revanced.twitch.utils.ReVancedUtils
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import okhttp3.*
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class RequestInterceptor : Interceptor {
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private var activeService: IAdblockService? = null
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private fun updateActiveService() {
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val current = SettingsEnum.BLOCK_EMBEDDED_ADS.string
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activeService = if(current == ReVancedUtils.getString("key_revanced_proxy_ttv_lol") && activeService !is TTVLolService)
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TTVLolService()
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else if(current == ReVancedUtils.getString("key_revanced_proxy_purpleadblock") && activeService !is PurpleAdblockService)
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PurpleAdblockService()
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else if(current == ReVancedUtils.getString("key_revanced_proxy_disabled"))
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null
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else
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activeService
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}
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override fun intercept(chain: Interceptor.Chain): Response {
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val originalRequest = chain.request()
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LogHelper.debug("Intercepted request to URL: %s", originalRequest.url.toString())
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// Skip if not HLS manifest request
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if (!originalRequest.url.host.contains("usher.ttvnw.net")) {
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return chain.proceed(originalRequest)
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}
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LogHelper.debug("Found HLS manifest request. Is VOD? %s; Channel: %s",
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if (originalRequest.isVod()) "yes" else "no", originalRequest.channelName())
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// None of the services support VODs currently
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if(originalRequest.isVod())
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return chain.proceed(originalRequest)
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updateActiveService()
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activeService?.let {
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val available = it.isAvailable()
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val rewritten = it.rewriteHlsRequest(originalRequest)
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if (!available || rewritten == null) {
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ReVancedUtils.toast(
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String.format(ReVancedUtils.getString("revanced_embedded_ads_service_unavailable"), it.friendlyName()),
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true
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)
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return chain.proceed(originalRequest)
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}
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LogHelper.debug("Rewritten HLS stream URL: %s", rewritten.url.toString())
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val maxAttempts = it.maxAttempts()
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for(i in 1..maxAttempts) {
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// Execute rewritten request and close body to allow multiple proceed() calls
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val response = chain.proceed(rewritten).apply { close() }
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if(!response.isSuccessful) {
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LogHelper.error("Request failed (attempt %d/%d): HTTP error %d (%s)",
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i, maxAttempts, response.code, response.message)
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Thread.sleep(50)
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}
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else {
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// Accept response from ad blocker
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LogHelper.debug("Ad-blocker used")
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return chain.proceed(rewritten)
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}
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}
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// maxAttempts exceeded; giving up on using the ad blocker
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ReVancedUtils.toast(
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String.format(ReVancedUtils.getString("revanced_embedded_ads_service_failed"), it.friendlyName()),
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true
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)
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}
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// Adblock disabled
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return chain.proceed(originalRequest)
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}
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}

‎app/src/main/java/app/revanced/twitch/api/RetrofitClient.java‎

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package app.revanced.twitch.api;
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import retrofit2.Retrofit;
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public class RetrofitClient {
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private static RetrofitClient instance = null;
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private final PurpleAdblockApi purpleAdblockApi;
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private RetrofitClient() {
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Retrofit retrofit = new Retrofit.Builder().baseUrl("http://localhost" /* dummy */).build();
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purpleAdblockApi = retrofit.create(PurpleAdblockApi.class);
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}
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public static synchronized RetrofitClient getInstance() {
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if (instance == null) {
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instance = new RetrofitClient();
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}
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return instance;
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}
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public PurpleAdblockApi getPurpleAdblockApi() {
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return purpleAdblockApi;
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}
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}

‎app/src/main/java/app/revanced/twitch/patches/EmbeddedAdsPatch.java‎

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package app.revanced.twitch.patches;
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import app.revanced.twitch.api.RequestInterceptor;
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public class EmbeddedAdsPatch {
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public static RequestInterceptor createRequestInterceptor() {
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return new RequestInterceptor();
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}
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}

‎app/src/main/java/app/revanced/twitch/settings/SettingsEnum.java‎

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@@ -10,6 +10,7 @@ public enum SettingsEnum {
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/* Ads */
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BLOCK_VIDEO_ADS("revanced_block_video_ads", true, ReturnType.BOOLEAN),
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BLOCK_AUDIO_ADS("revanced_block_audio_ads", true, ReturnType.BOOLEAN),
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BLOCK_EMBEDDED_ADS("revanced_block_embedded_ads", "ttv-lol", ReturnType.STRING),
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/* Chat */
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SHOW_DELETED_MESSAGES("revanced_show_deleted_messages", "cross-out", ReturnType.STRING),

‎app/src/main/java/app/revanced/twitch/utils/LogHelper.java‎

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private static void showDebugToast(String msg) {
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if(SettingsEnum.DEBUG_MODE.getBoolean()) {
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ReVancedUtils.ifContextAttached((c) -> Toast.makeText(c, msg, Toast.LENGTH_SHORT).show());
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ReVancedUtils.toast(msg, false);
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}
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}
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}

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