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Code Issues Packages Projects Releases Wiki Activity

Extract user agent string from WebView

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This commit is contained in:
arkon
2021-01-23 15:57:59 -05:00
parent 04a993c997
commit 0685382083
4 changed files with 35 additions and 22 deletions
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43
app/src/main/java/eu/kanade/tachiyomi/util/system/WebViewUtil.kt
View File

@@ -1,26 +1,39 @@
package eu.kanade.tachiyomi.util.system
import android.annotation.SuppressLint
import android.content.Context
import android.content.pm.PackageManager
import android.webkit.CookieManager
import android.webkit.WebSettings
import android.webkit.WebView
import eu.kanade.tachiyomi.util.lang.launchUI
import timber.log.Timber
object WebViewUtil {
val WEBVIEW_UA_VERSION_REGEX by lazy {
Regex(""".*Chrome/(\d+)\..*""")
}
var DEFAULT_USER_AGENT: String = "Mozilla/5.0 (Windows NT 10.0; Win64; x64)"
private set
const val REQUESTED_WITH = "com.android.browser"
const val MINIMUM_WEBVIEW_VERSION = 86
const val MINIMUM_WEBVIEW_VERSION = 87
fun supportsWebView(context: Context): Boolean {
try {
// May throw android.webkit.WebViewFactory$MissingWebViewPackageException if WebView
// is not installed
CookieManager.getInstance()
launchUI {
DEFAULT_USER_AGENT = WebView(context)
.getDefaultUserAgentString()
.replace("; wv", "")
}
} catch (e: Exception) {
Timber.e(e)
return false
}
@@ -29,9 +42,10 @@ object WebViewUtil {
}
fun WebView.isOutdated(): Boolean {
return getWebViewMajorVersion(this) < WebViewUtil.MINIMUM_WEBVIEW_VERSION
return getWebViewMajorVersion() < WebViewUtil.MINIMUM_WEBVIEW_VERSION
}
@SuppressLint("SetJavaScriptEnabled")
fun WebView.setDefaultSettings() {
with(settings) {
javaScriptEnabled = true
@@ -44,22 +58,25 @@ fun WebView.setDefaultSettings() {
}
}
// Based on https://stackoverflow.com/a/29218966
private fun getWebViewMajorVersion(webview: WebView): Int {
val originalUA: String = webview.settings.userAgentString
// Next call to getUserAgentString() will get us the default
webview.settings.userAgentString = null
val uaRegexMatch = WebViewUtil.WEBVIEW_UA_VERSION_REGEX.matchEntire(webview.settings.userAgentString)
val webViewVersion: Int = if (uaRegexMatch != null && uaRegexMatch.groupValues.size > 1) {
private fun WebView.getWebViewMajorVersion(): Int {
val uaRegexMatch = WebViewUtil.WEBVIEW_UA_VERSION_REGEX.matchEntire(getDefaultUserAgentString())
return if (uaRegexMatch != null && uaRegexMatch.groupValues.size > 1) {
uaRegexMatch.groupValues[1].toInt()
} else {
0
}
}
// Based on https://stackoverflow.com/a/29218966
private fun WebView.getDefaultUserAgentString(): String {
val originalUA: String = settings.userAgentString
// Next call to getUserAgentString() will get us the default
settings.userAgentString = null
val defaultUserAgentString = settings.userAgentString
// Revert to original UA string
webview.settings.userAgentString = originalUA
settings.userAgentString = originalUA
return webViewVersion
return defaultUserAgentString
}