Rapidly obtaining a subset of message data from a server for filtering

• US 7,613,777 B2
• Filed: 03/11/2004
• Issued: 11/03/2009
• Est. Priority Date: 03/11/2004
• Status: Expired due to Fees

• Current Assignee: Microsoft Technology Licensing LLC (Microsoft Corporation)
• Original Assignee: Microsoft Corporation
• Inventors: Kromann, Paul K., Giles, Tadd H.
• Primary Examiner(s): Vaughn, Jr.; William C
• Assistant Examiner(s): Zhang; Shirley X
• Application Number:
  US10/797,994
• Publication Number:
  US 20050223085A1
• Time in Patent Office: 2,063 Days
• Field of Search: 709206-207, 709/203, 707/201
• US Class Current: 709/206
• CPC Class Codes: H04L 51/212 using filtering or selective blocking
• CPC Class Codes: H04L 51/42 Mailbox-related aspects, e.g. synchronisation of mailboxes
• CPC Class Codes: H04L 51/58 Message adaptation for wireless communication
• CPC Class Codes: Y10S 707/99952 Coherency, e.g. same view to multiple users

Abstract

Described is a system and method in which client-side tracking mechanisms allow a computing device to efficiently decide which messages need to be downloaded from a server for subsequent filtering evaluation, and request only those messages. For example, the present invention may be used to limit a download of POP3 email messages to those received in the last n days. When a message is downloaded that does not meet user-specified filtering criteria such as a date window, the message data is discarded, but the state of that message as not meeting the criteria is preserved in an already-checked table. On a subsequent data request, the received list of unique message IDs is checked against the main message store and the checked table, and message data only downloaded if the unique ID is not found. Messages that are not listed are removed from the message store or the checked table.

Claims

1. In a computing network comprised of a plurality of interconnected servers for transferring messages among the interconnected servers, and wherein at least some of the servers use a communication protocol that is not configured for communicating filtering information to the server, and wherein the computing network also comprises a plurality of client side computing devices for accessing the servers and downloading messages, a method of using client-side tracking mechanisms to allow a client side computing device to efficiently determine which messages need to be downloaded from the at least some servers for filtering at the client side computing device, so that essentially most of the filtering operations occur before the messages are downloaded, the method comprising:

setting at a client side computing device a filter criteria for new messages;

receiving at the client side computing device a list that identifies all messages maintained at least one server using a communication protocol that is not configured for communicating filtering information to the server;

retrieving at the client side computing device a message store table that contains records identifying each message which has previously met the filter criteria and has been placed in a message store, and marking each record with a flag;

retrieving at the client side computing device a checked table, the checked table comprising records identifying each message which has been checked against the filter criteria and has been found not to meet the filter criteria, and marking each record with a flag;

comparing the messages identified in the received list for all messages maintained at the at least one server with the records contained in the message store table and, for each message, determining if the message has already been placed in the message store;

comparing the messages identified in the received list for all messages maintained at the at least one server with the records contained in the checked table and, for each message, determining if the message is in the checked table, the checked table comprising records identifying messages having already been checked against the filter criteria and having been found not to meet the filter criteria;

then downloading to an inbox at the client side computing device all messages from the list that do not already correspond to a record in either the message store table or the checked table, so that download time is limited only to all new messages as determined from the message store table and the checked table;

unmarking the flags for all records contained in either the message store table or the checked table that already correspond to those messages identified in the list that have been previously identified in either of the tables;

checking all new messages downloaded against the filter criteria, and either adding a new unmarked record to the message store table if the filter criteria is met, or else adding a new unmarked record to the checked table if the filter criteria is not met; and

removing any remaining records with marked flags in the message store table and the checked table.

2. A computer program product for use in a computing network comprised of a plurality of interconnected servers for transferring messages among the interconnected servers, and wherein at least some of the servers use a communication protocol that is not configured for communicating filtering information to the server, and wherein the computing network also comprises a plurality of client side computing devices for accessing the servers and downloading messages, the computer program product comprised of computer-executable instructions for implementing a method of using client-side tracking mechanisms to allow a client side computing device to efficiently determine which messages need to be downloaded from the at least some servers for filtering at the client side computing device, so that essentially most of the filtering operations occur before the messages are downloaded, and wherein the method implemented by computer program product'"'"'s computer-executable instructions comprises the method of claim 1.

3. A method as defined in claims 1 or 2, wherein the client side computing device includes a plurality of application programs running on the client side computing device, and wherein one or more of the application programs may configured by a user to establish filtering criteria for message information handled by that particular application program.

4. A method as defined in claim 3 wherein the client side computing device includes a message store managing component which allows each of the application programs to store and retrieve stored messages for that application program.

5. A method as defined in claim 4 wherein the client side computing device includes a plurality of transports configured to receive and transmit different types of messages.

6. A method as defined in claim 5 wherein the messages may comprise any or all of the following kinds of messages:

IMAP4, SMS, POP3, Active Sync, IM, and MMS.

7. The method of claim 1 wherein receiving the list that identifies the messages comprises issuing a UIDL command to a POP3 server and receiving a plurality of unique message identifiers in response.

8. The method of claim 1 wherein the filtering criteria comprises a time window.

9. The method of claim 2 wherein receiving the list that identifies the messages comprises issuing a UIDL command to a POP3 server.