de.yaacc.share.StreamIntake Class Reference

The checks a browser activity repeats on a shared file it receives. More...

Collaboration diagram for de.yaacc.share.StreamIntake:

Static Public Member Functions
static String	validate (String action, int clipItemCount, String clipItemZeroUri, boolean hasData, int intentFlags, String ownAuthority, Predicate< String > isOwnProviderAuthority)

Static Public Attributes
static final int	READ_FLAG = 0x1
	Intent.FLAG_GRANT_READ_URI_PERMISSION, as a number so this class stays free of android.*.

Detailed Description

The checks a browser activity repeats on a shared file it receives.

The launcher forwards a file only after its own checks, but TabBrowserActivity is exported, so any app can start a browser directly with any intent: nothing is trusted because "it came from the launcher". Plain Java, no android.*; the glue reads the fields from the Intent.

A share is accepted only if ALL hold:

• the action is exactly android.intent.action.SEND;
• the ClipData has exactly ONE item (the system checks the grant for every ClipData item, never for EXTRA_STREAM, so the one URI is read from item 0 only);
• the intent has no data;
• the intent's own flags carry READ_FLAG (a read grant that really arrived with this intent; without it the system did not check that the sender holds access);
• SharedContentPolicy#isAcceptableUri accepts the text (a content: URI of another app);
• the authority is not a provider of this app (any of our providers, not only the file provider), judged by isOwnProviderAuthority; if that check throws, the share is refused.

Member Function Documentation

validate()

static String de.yaacc.share.StreamIntake.validate ( String action, int clipItemCount, String clipItemZeroUri, boolean hasData, int intentFlags, String ownAuthority, Predicate< String > isOwnProviderAuthority )

static

Parameters

action	the intent's action, may be null
clipItemCount	the number of ClipData items, 0 for no ClipData
clipItemZeroUri	the URI of ClipData item 0 as text, may be null
hasData	true if the intent has a data URI
intentFlags	the intent's own flags
ownAuthority	the authority of yaacc's file provider
isOwnProviderAuthority	true if an authority belongs to a provider of this app

Returns

the URI text to keep as the pending share, or null to ignore the intent

Here is the call graph for this function:

---

The documentation for this class was generated from the following file:

• /github/workspace/yaacc/src/main/java/de/yaacc/share/StreamIntake.java