什么是机器人之间的区别：权限=＆QUOT; packagename.permissions.BROWSER_PROVIDER＆QUOT;和android：grantUriPermissions？ [英] What's the difference between android:permission="packagename.permissions.BROWSER_PROVIDER" and android:grantUriPermissions?

问题描述

我很好奇，只是因为我想访问的URI说以下内容：

I am curious simply because the uri I am trying to access says the following:

java.lang.SecurityException: Permission Denial: reading com.foo.MyProvider uri content://com.foo/history from pid=20735, uid=10080 requires com.foo.permissions.BROWSER_PROVIDER, or grantUriPermission()

不过，该应用程序内的供应商实际上有：

However, the provider within that app actually has:

<provider android:name="com.foo.MyProvider"
          android:authorities="com.foo.db.mydb"
          android:permission="com.foo.permissions.BROWSER_PROVIDER">=
</provider>

这是否意味着其实我所需要的的android：grantUriPermissions = TRUE 的供应商呢？这两个声明之间的区别是什么？

Does this mean that I actually DO need the android:grantUriPermissions=true on the provider as well? What is the difference between these two declarations?

例如：

下面是我要尝试自己的应用程序中访问来自供应商：

Here is a provider which I am going to attempt to access from within my own application:

的http://dxr.mozilla.org/mozilla-central/source/mobile/android/base/AndroidManifest.xml.in#274

如果我是尝试注册一个观察者到提供商的URI（这恰好是内容：//org.mozilla.firefox.db.browser/history ）用下面的code：

If I were to attempt to register an observer to that provider's uri (which happens to be content://org.mozilla.firefox.db.browser/history) with the following code:

    private ContentObserver mFirefoxObserver;
    resolver.registerContentObserver("content://org.mozilla.firefox.db.browser/history", true, mFirefoxObserver);

然后收到该错误是：

Then the error received is:

java.lang.SecurityException: Permission Denial: reading org.mozilla.gecko.db.BrowserProvider uri content://org.mozilla.firefox.db.browser/history from pid=20735, uid=10080 requires org.mozilla.firefox.permissions.BROWSER_PROVIDER, or grantUriPermission()

但是，你会发现，权限是在供应商设置：

But, you'll notice that the permission IS set in the provider:

<provider android:name="org.mozilla.gecko.db.BrowserProvider"
              android:authorities="@ANDROID_PACKAGE_NAME@.db.browser"
              android:permission="@ANDROID_PACKAGE_NAME@.permissions.BROWSER_PROVIDER">
...

所以我的问题是，为什么错误说我需要一个许可或grantUriPermissions，当一个人明显存在？

So my question is, why does the error say I need that permission OR grantUriPermissions, when one is clearly there?

推荐答案

如果你看看这个的行，你会看到此权限的声明

If you look at this line, you'll see the declaration of this permission

<permission android:name="@ANDROID_PACKAGE_NAME@.permissions.BROWSER_PROVIDER"
            android:protectionLevel="signature"/>

由于这是一个签名级别的权限，你不能持有此权限。只有应用程序使用相同的开发人员密钥作为应用程序可以签署。

Since this is a signature level permission, you cannot hold this permission. Only apps signed with the same developer key as that app can.

回到现在的供应商，这里它的全部声明：

Back to the provider now, here is it's full declaration:

<provider android:name="org.mozilla.gecko.db.BrowserProvider"
          android:authorities="@ANDROID_PACKAGE_NAME@.db.browser"
          android:permission="@ANDROID_PACKAGE_NAME@.permissions.BROWSER_PROVIDER">

        <path-permission android:pathPrefix="/search_suggest_query"
                         android:readPermission="android.permission.GLOBAL_SEARCH" />

</provider>

这表示，你需要 org.mozilla.firefox.permissions.BROWSER_PROVIDER 来直接接入运营商，这正如我上面所指出的，你不能有。在供应商虽然是重要组成部分， ＆LT;路径许可＆GT; 。什么这个元素的意思是，你可以访问 / search_suggest_query 开始的路径，如果你持有 android.permission.GLOBAL_SEARCH 许可。

Here it says that you need org.mozilla.firefox.permissions.BROWSER_PROVIDER to access the provider outright, which as I pointed out above, you cannot have. Within the provider though is the key part, <path-permission>. What this element is saying is that you can access paths beginning with /search_suggest_query if you hold the android.permission.GLOBAL_SEARCH permission.

您会得到一个安全异常，因为你试图访问 /历史，它不允许你做的。

You're getting a security exception because you are trying to access /history, which you are not allowed to do.

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