Make default user agent string configurable

app/src/main/java/eu/kanade/tachiyomi/data/preference/PreferenceKeys.kt

@@ -59,6 +59,8 @@ object PreferenceKeys {
 
     const val dohProvider = "doh_provider"
 
+    const val defaultUserAgent = "default_user_agent"
+
     const val defaultChapterFilterByRead = "default_chapter_filter_by_read"
 
     const val defaultChapterFilterByDownloaded = "default_chapter_filter_by_downloaded"

app/src/main/java/eu/kanade/tachiyomi/data/preference/PreferencesHelper.kt

@@ -294,6 +294,8 @@ class PreferencesHelper(val context: Context) {
 
     fun dohProvider() = prefs.getInt(Keys.dohProvider, -1)
 
+    fun defaultUserAgent() = flowPrefs.getString(Keys.defaultUserAgent, "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/102.0.5005.124 Safari/537.36 Edg/102.0.1245.44")
+
     fun lastSearchQuerySearchSettings() = flowPrefs.getString("last_search_query", "")
 
     fun filterChapterByRead() = prefs.getInt(Keys.defaultChapterFilterByRead, DomainManga.SHOW_ALL.toInt())

app/src/main/java/eu/kanade/tachiyomi/network/NetworkHelper.kt

@@ -60,4 +60,8 @@ class NetworkHelper(context: Context) {
             .addInterceptor(CloudflareInterceptor(context))
             .build()
     }
+
+    val defaultUserAgent by lazy {
+        preferences.defaultUserAgent().get()
+    }
 }

app/src/main/java/eu/kanade/tachiyomi/network/interceptor/CloudflareInterceptor.kt

@@ -9,7 +9,6 @@ import android.widget.Toast
 import androidx.core.content.ContextCompat
 import eu.kanade.tachiyomi.R
 import eu.kanade.tachiyomi.network.NetworkHelper
-import eu.kanade.tachiyomi.source.online.HttpSource
 import eu.kanade.tachiyomi.util.lang.launchUI
 import eu.kanade.tachiyomi.util.system.DeviceUtil
 import eu.kanade.tachiyomi.util.system.WebViewClientCompat
@@ -109,7 +108,7 @@ class CloudflareInterceptor(private val context: Context) : Interceptor {
 
             // Avoid sending empty User-Agent, Chromium WebView will reset to default if empty
             webview.settings.userAgentString = request.header("User-Agent")
-                ?: HttpSource.DEFAULT_USER_AGENT
+                ?: networkHelper.defaultUserAgent
 
             webview.webViewClient = object : WebViewClientCompat() {
                 override fun onPageFinished(view: WebView, url: String) {

app/src/main/java/eu/kanade/tachiyomi/network/interceptor/UserAgentInterceptor.kt

@@ -1,10 +1,14 @@
 package eu.kanade.tachiyomi.network.interceptor
 
-import eu.kanade.tachiyomi.source.online.HttpSource
+import eu.kanade.tachiyomi.network.NetworkHelper
 import okhttp3.Interceptor
 import okhttp3.Response
+import uy.kohesive.injekt.injectLazy
 
 class UserAgentInterceptor : Interceptor {
+
+    private val networkHelper: NetworkHelper by injectLazy()
+
     override fun intercept(chain: Interceptor.Chain): Response {
         val originalRequest = chain.request()
 
@@ -12,7 +16,7 @@ class UserAgentInterceptor : Interceptor {
             val newRequest = originalRequest
                 .newBuilder()
                 .removeHeader("User-Agent")
-                .addHeader("User-Agent", HttpSource.DEFAULT_USER_AGENT)
+                .addHeader("User-Agent", networkHelper.defaultUserAgent)
                 .build()
             chain.proceed(newRequest)
         } else {

app/src/main/java/eu/kanade/tachiyomi/source/online/HttpSource.kt

@@ -15,6 +15,7 @@ import okhttp3.OkHttpClient
 import okhttp3.Request
 import okhttp3.Response
 import rx.Observable
+import uy.kohesive.injekt.api.get
 import uy.kohesive.injekt.injectLazy
 import java.net.URI
 import java.net.URISyntaxException
@@ -67,7 +68,7 @@ abstract class HttpSource : CatalogueSource {
      * Headers builder for requests. Implementations can override this method for custom headers.
      */
     protected open fun headersBuilder() = Headers.Builder().apply {
-        add("User-Agent", DEFAULT_USER_AGENT)
+        add("User-Agent", network.defaultUserAgent)
     }
 
     /**
@@ -368,8 +369,4 @@ abstract class HttpSource : CatalogueSource {
      * Returns the list of filters for the source.
      */
     override fun getFilterList() = FilterList()
-
-    companion object {
-        const val DEFAULT_USER_AGENT = "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/102.0.5005.124 Safari/537.36 Edg/102.0.1245.44"
-    }
 }

app/src/main/java/eu/kanade/tachiyomi/ui/setting/SettingsAdvancedController.kt

@@ -33,6 +33,7 @@ import eu.kanade.tachiyomi.util.lang.launchIO
 import eu.kanade.tachiyomi.util.lang.withUIContext
 import eu.kanade.tachiyomi.util.preference.bindTo
 import eu.kanade.tachiyomi.util.preference.defaultValue
+import eu.kanade.tachiyomi.util.preference.editTextPreference
 import eu.kanade.tachiyomi.util.preference.entriesRes
 import eu.kanade.tachiyomi.util.preference.intListPreference
 import eu.kanade.tachiyomi.util.preference.listPreference
@@ -215,6 +216,28 @@ class SettingsAdvancedController(
                     true
                 }
             }
+            editTextPreference {
+                key = Keys.defaultUserAgent
+                titleRes = R.string.pref_user_agent_string
+                text = preferences.defaultUserAgent().get()
+                summary = network.defaultUserAgent
+
+                onChange {
+                    activity?.toast(R.string.requires_app_restart)
+                    true
+                }
+            }
+            if (preferences.defaultUserAgent().isSet()) {
+                preference {
+                    key = "pref_reset_user_agent"
+                    titleRes = R.string.pref_reset_user_agent_string
+
+                    onClick {
+                        preferences.defaultUserAgent().delete()
+                        activity?.toast(R.string.requires_app_restart)
+                    }
+                }
+            }
         }
 
         preferenceCategory {

app/src/main/res/values/strings.xml

@@ -468,6 +468,8 @@
     <string name="label_network">Network</string>
     <string name="pref_clear_cookies">Clear cookies</string>
     <string name="pref_dns_over_https">DNS over HTTPS (DoH)</string>
+    <string name="pref_user_agent_string">Default user agent string</string>
+    <string name="pref_reset_user_agent_string">Reset default user agent string</string>
     <string name="requires_app_restart">Requires app restart to take effect</string>
     <string name="cookies_cleared">Cookies cleared</string>
     <string name="label_data">Data</string>