-
Notifications
You must be signed in to change notification settings - Fork 903
Commit
This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository.
Extract blob download in iframes logic to make it reusable
- Loading branch information
Showing
16 changed files
with
471 additions
and
352 deletions.
There are no files selected for viewing
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
46 changes: 0 additions & 46 deletions
46
app/src/main/java/com/duckduckgo/app/browser/WebViewSafeMessageListening.kt
This file was deleted.
Oops, something went wrong.
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
163 changes: 163 additions & 0 deletions
163
...l-impl/src/main/java/com/duckduckgo/autofill/impl/importing/blob/WebViewBlobDownloader.kt
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,163 @@ | ||
| /* | ||
| * Copyright (c) 2024 DuckDuckGo | ||
| * | ||
| * Licensed under the Apache License, Version 2.0 (the "License"); | ||
| * you may not use this file except in compliance with the License. | ||
| * You may obtain a copy of the License at | ||
| * | ||
| * http://www.apache.org/licenses/LICENSE-2.0 | ||
| * | ||
| * Unless required by applicable law or agreed to in writing, software | ||
| * distributed under the License is distributed on an "AS IS" BASIS, | ||
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| * See the License for the specific language governing permissions and | ||
| * limitations under the License. | ||
| */ | ||
|
|
||
| package com.duckduckgo.autofill.impl.importing.blob | ||
|
|
||
| import android.annotation.SuppressLint | ||
| import android.net.Uri | ||
| import android.webkit.WebView | ||
| import androidx.webkit.JavaScriptReplyProxy | ||
| import androidx.webkit.WebViewCompat | ||
| import com.duckduckgo.app.browser.api.WebViewCapabilityChecker | ||
| import com.duckduckgo.app.browser.api.WebViewCapabilityChecker.WebViewCapability | ||
| import com.duckduckgo.di.scopes.AppScope | ||
| import com.squareup.anvil.annotations.ContributesBinding | ||
| import javax.inject.Inject | ||
|
|
||
| /** | ||
| * This interface provides the ability to add modern blob download support to a WebView. | ||
| */ | ||
| interface WebViewBlobDownloader { | ||
|
|
||
| /** | ||
| * Configures a web view to support blob downloads, including in iframes. | ||
| */ | ||
| suspend fun addBlobDownloadSupport(webView: WebView) | ||
|
|
||
| /** | ||
| * Requests the WebView to convert a blob URL to a data URI. | ||
| */ | ||
| suspend fun convertBlobToDataUri(blobUrl: String) | ||
|
|
||
| /** | ||
| * Stores a reply proxy for a given location. | ||
| */ | ||
| suspend fun storeReplyProxy( | ||
| originUrl: String, | ||
| replyProxy: JavaScriptReplyProxy, | ||
| locationHref: String?, | ||
| ) | ||
|
|
||
| /** | ||
| * Clears any stored JavaScript reply proxies. | ||
| */ | ||
| fun clearReplyProxies() | ||
| } | ||
|
|
||
| @ContributesBinding(AppScope::class) | ||
| class WebViewBlobDownloaderModernImpl @Inject constructor( | ||
| private val webViewCapabilityChecker: WebViewCapabilityChecker, | ||
| ) : WebViewBlobDownloader { | ||
|
|
||
| // Map<String, Map<String, JavaScriptReplyProxy>>() = Map<Origin, Map<location.href, JavaScriptReplyProxy>>() | ||
| private val fixedReplyProxyMap = mutableMapOf<String, Map<String, JavaScriptReplyProxy>>() | ||
|
|
||
| @SuppressLint("RequiresFeature") | ||
| override suspend fun addBlobDownloadSupport(webView: WebView) { | ||
| if (isBlobDownloadWebViewFeatureEnabled()) { | ||
| WebViewCompat.addDocumentStartJavaScript(webView, script, setOf("*")) | ||
| } | ||
| } | ||
|
|
||
| @SuppressLint("RequiresFeature") | ||
| override suspend fun convertBlobToDataUri(blobUrl: String) { | ||
| for ((key, proxies) in fixedReplyProxyMap) { | ||
| if (sameOrigin(blobUrl.removePrefix("blob:"), key)) { | ||
| for (replyProxy in proxies.values) { | ||
| replyProxy.postMessage(blobUrl) | ||
| } | ||
| return | ||
| } | ||
| } | ||
| } | ||
|
|
||
| override suspend fun storeReplyProxy( | ||
| originUrl: String, | ||
| replyProxy: JavaScriptReplyProxy, | ||
| locationHref: String?, | ||
| ) { | ||
| val frameProxies = fixedReplyProxyMap[originUrl]?.toMutableMap() ?: mutableMapOf() | ||
| // if location.href is not passed, we fall back to origin | ||
| val safeLocationHref = locationHref ?: originUrl | ||
| frameProxies[safeLocationHref] = replyProxy | ||
| fixedReplyProxyMap[originUrl] = frameProxies | ||
| } | ||
|
|
||
| private fun sameOrigin( | ||
| firstUrl: String, | ||
| secondUrl: String, | ||
| ): Boolean { | ||
| return kotlin.runCatching { | ||
| val firstUri = Uri.parse(firstUrl) | ||
| val secondUri = Uri.parse(secondUrl) | ||
|
|
||
| firstUri.host == secondUri.host && firstUri.scheme == secondUri.scheme && firstUri.port == secondUri.port | ||
| }.getOrNull() ?: return false | ||
| } | ||
|
|
||
| override fun clearReplyProxies() { | ||
| fixedReplyProxyMap.clear() | ||
| } | ||
|
|
||
| private suspend fun isBlobDownloadWebViewFeatureEnabled(): Boolean { | ||
| return webViewCapabilityChecker.isSupported(WebViewCapability.WebMessageListener) && | ||
| webViewCapabilityChecker.isSupported(WebViewCapability.DocumentStartJavaScript) | ||
| } | ||
|
|
||
| companion object { | ||
| private val script = """ | ||
| window.__url_to_blob_collection = {}; | ||
| const original_createObjectURL = URL.createObjectURL; | ||
| URL.createObjectURL = function () { | ||
| const blob = arguments[0]; | ||
| const url = original_createObjectURL.call(this, ...arguments); | ||
| if (blob instanceof Blob) { | ||
| __url_to_blob_collection[url] = blob; | ||
| } | ||
| return url; | ||
| } | ||
| function blobToBase64DataUrl(blob) { | ||
| return new Promise((resolve, reject) => { | ||
| const reader = new FileReader(); | ||
| reader.onloadend = function() { | ||
| resolve(reader.result); | ||
| } | ||
| reader.onerror = function() { | ||
| reject(new Error('Failed to read Blob object')); | ||
| } | ||
| reader.readAsDataURL(blob); | ||
| }); | ||
| } | ||
| const pingMessage = 'Ping:' + window.location.href | ||
| ddgBlobDownloadObj.postMessage(pingMessage) | ||
| ddgBlobDownloadObj.onmessage = function(event) { | ||
| if (event.data.startsWith('blob:')) { | ||
| const blob = window.__url_to_blob_collection[event.data]; | ||
| if (blob) { | ||
| blobToBase64DataUrl(blob).then((dataUrl) => { | ||
| ddgBlobDownloadObj.postMessage(dataUrl); | ||
| }); | ||
| } | ||
| } | ||
| } | ||
| """.trimIndent() | ||
| } | ||
| } |
Oops, something went wrong.