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Android filename validation when downloading from browser #7

Merged
merged 4 commits into from
Mar 26, 2024
Merged

Android filename validation when downloading from browser #7

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c41b213
show prompt before download starts
jpcloureiro Feb 14, 2024
c924268
rtlo filename protection
jpcloureiro Feb 21, 2024
3af7d50
Merge branch 'main' into rtlo-protect
jpcloureiro Mar 26, 2024
0e850db
remove bad code from previous merge
jpcloureiro Mar 26, 2024
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69 changes: 43 additions & 26 deletions android/src/main/java/com/reactnativecommunity/webview/RNCWebViewManagerImpl.kt
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Original file line number Diff line number Diff line change
@@ -1,6 +1,8 @@
package com.reactnativecommunity.webview

import android.app.AlertDialog
import android.app.DownloadManager
import android.content.DialogInterface
import android.content.pm.ActivityInfo
import android.graphics.Bitmap
import android.graphics.Color
Expand All @@ -15,6 +17,7 @@ import android.webkit.CookieManager
import android.webkit.DownloadListener
import android.webkit.WebSettings
import android.webkit.WebView
import android.widget.Toast
import androidx.webkit.WebSettingsCompat
import androidx.webkit.WebViewFeature
import com.facebook.react.bridge.ReadableArray
Expand All @@ -27,6 +30,7 @@ import org.json.JSONObject
import java.io.UnsupportedEncodingException
import java.net.MalformedURLException
import java.net.URL
import java.text.Bidi
import java.util.Locale

val invalidCharRegex = "[\\\\/%\"]".toRegex()
Expand Down Expand Up @@ -106,33 +110,46 @@ class RNCWebViewManagerImpl {

val downloadMessage = "Downloading $fileName"

//Attempt to add cookie, if it exists
var urlObj: URL? = null
try {
urlObj = URL(url)
val baseUrl = urlObj.protocol + "://" + urlObj.host
val cookie = CookieManager.getInstance().getCookie(baseUrl)
request.addRequestHeader("Cookie", cookie)
} catch (e: MalformedURLException) {
Log.w(TAG, "Error getting cookie for DownloadManager", e)
}
//Filename validation checking for files that use RTL characters and do not allow those types
if (Bidi(fileName, Bidi.DIRECTION_DEFAULT_LEFT_TO_RIGHT).isMixed) {
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Toast.makeText(webView.context, "Invalid filename or type", Toast.LENGTH_LONG).show()
} else {
val builder = AlertDialog.Builder(webView.context)
builder.setMessage("Do you want to download \n$fileName?")
builder.setCancelable(false)
builder.setPositiveButton("Download") { _, _ ->
//Attempt to add cookie, if it exists
var urlObj: URL? = null
try {
urlObj = URL(url)
val baseUrl = urlObj.protocol + "://" + urlObj.host
val cookie = CookieManager.getInstance().getCookie(baseUrl)
request.addRequestHeader("Cookie", cookie)
} catch (e: MalformedURLException) {
Log.w(TAG, "Error getting cookie for DownloadManager", e)
}

//Finish setting up request
request.addRequestHeader("User-Agent", userAgent)
request.setTitle(fileName)
request.setDescription(downloadMessage)
request.allowScanningByMediaScanner()
request.setNotificationVisibility(DownloadManager.Request.VISIBILITY_VISIBLE_NOTIFY_COMPLETED)
request.setDestinationInExternalPublicDir(Environment.DIRECTORY_DOWNLOADS, fileName)
module.setDownloadRequest(request)
if (module.grantFileDownloaderPermissions(
getDownloadingMessageOrDefault(),
getLackPermissionToDownloadMessageOrDefault()
)
) {
module.downloadFile(
getDownloadingMessageOrDefault()
)
//Finish setting up request
request.addRequestHeader("User-Agent", userAgent)
request.setTitle(fileName)
request.setDescription(downloadMessage)
request.allowScanningByMediaScanner()
request.setNotificationVisibility(DownloadManager.Request.VISIBILITY_VISIBLE_NOTIFY_COMPLETED)
request.setDestinationInExternalPublicDir(Environment.DIRECTORY_DOWNLOADS, fileName)
module.setDownloadRequest(request)
if (module.grantFileDownloaderPermissions(
getDownloadingMessageOrDefault(),
getLackPermissionToDownloadMessageOrDefault()
)
) {
module.downloadFile(
getDownloadingMessageOrDefault()
)
}
}
builder.setNegativeButton("Cancel") { _: DialogInterface?, _: Int -> }
val alertDialog = builder.create()
alertDialog.show()
}
})
return RNCWebViewWrapper(context, webView)
Expand Down