/**
* For a given msg hdr, iterate through the list of remote content blocking criteria.
* returns nsIContentPolicy::REJECT if the msg hdr fails any of these tests.
*
* @param aRequestingLocation cannot be null
*/
nsresult nsMsgContentPolicy::AllowRemoteContentForMsgHdr(nsIMsgDBHdr * aMsgHdr, nsIURI * aRequestingLocation, nsIURI * aContentLocation, PRInt16 *aDecision)
{
NS_ENSURE_ARG_POINTER(aMsgHdr);
// Case #1, check the db hdr for the remote content policy on this particular message
PRUint32 remoteContentPolicy = kNoRemoteContentPolicy;
aMsgHdr->GetUint32Property("remoteContentPolicy", &remoteContentPolicy);
// Case #2, check if the message is in an RSS folder
PRBool isRSS = PR_FALSE;
IsRSSArticle(aRequestingLocation, &isRSS);
// Case #3, the domain for the remote image is in our white list
PRBool trustedDomain = IsTrustedDomain(aContentLocation);
// Case 4 is expensive as we're looking up items in the address book. So if
// either of the two previous items means we load the data, just do it.
if (isRSS || remoteContentPolicy == kAllowRemoteContent || trustedDomain)
{
*aDecision = nsIContentPolicy::ACCEPT;
return NS_OK;
}
// Case #4, author is in our white list..
PRBool allowForSender = PR_FALSE;
AllowRemoteContentForSender(aMsgHdr, &allowForSender);
*aDecision = allowForSender ?
nsIContentPolicy::ACCEPT : nsIContentPolicy::REJECT_REQUEST;
if (*aDecision == nsIContentPolicy::REJECT_REQUEST && !remoteContentPolicy) // kNoRemoteContentPolicy means we have never set a value on the message
aMsgHdr->SetUint32Property("remoteContentPolicy", kBlockRemoteContent);
return NS_OK; // always return success
}
/**
* The default for this function will be to reject the content request.
* When determining if to allow the request for a given msg hdr, the function
* will go through the list of remote content blocking criteria:
*
* #1 Allow if there is a db header for a manual override.
* #2 Allow if the message is in an RSS folder.
* #3 Allow if the domain for the remote image in our white list.
* #4 Allow if the author has been specifically white listed.
*/
PRInt16
nsMsgContentPolicy::ShouldAcceptRemoteContentForMsgHdr(nsIMsgDBHdr *aMsgHdr,
nsIURI *aRequestingLocation,
nsIURI *aContentLocation)
{
if (!aMsgHdr)
return static_cast<PRInt16>(nsIContentPolicy::REJECT_REQUEST);
// Case #1, check the db hdr for the remote content policy on this particular
// message.
PRUint32 remoteContentPolicy = kNoRemoteContentPolicy;
aMsgHdr->GetUint32Property("remoteContentPolicy", &remoteContentPolicy);
// Case #2, check if the message is in an RSS folder
bool isRSS = false;
IsRSSArticle(aRequestingLocation, &isRSS);
// Case #3, the domain for the remote image is in our white list
bool trustedDomain = IsTrustedDomain(aContentLocation);
// Case 4 is expensive as we're looking up items in the address book. So if
// either of the two previous items means we load the data, just do it.
if (isRSS || remoteContentPolicy == kAllowRemoteContent || trustedDomain)
return nsIContentPolicy::ACCEPT;
// Case #4, author is in our white list..
bool allowForSender = ShouldAcceptRemoteContentForSender(aMsgHdr);
PRInt16 result = allowForSender ?
static_cast<PRInt16>(nsIContentPolicy::ACCEPT) :
static_cast<PRInt16>(nsIContentPolicy::REJECT_REQUEST);
// kNoRemoteContentPolicy means we have never set a value on the message
if (result == nsIContentPolicy::REJECT_REQUEST && !remoteContentPolicy)
aMsgHdr->SetUint32Property("remoteContentPolicy", kBlockRemoteContent);
return result;
}
