Patent ID: 8732252

Claim:
A cooperating system comprising: a chat server to execute a procedure including, an extracting process that, when detecting a URL related to a blog in a message received from outside the chat server, extracts the received message, and an acquiring process that acquires a trackback URL from a blog server based on the detected URL; the chat server also includes, a storage to store a message and the trackback URL extracted by the extracting part in association with a newly created URL, and a history file to store the message extracted by the extracting process, transmitter identification information corresponding to the message, and the created URL created related to the message; and the chat server to execute the procedure that further includes: a detecting process that, when detecting a request for transmitting the message corresponding to the created URL stored in the storage, detects a login state based on the message transmitter identification information stored in the history file related to the created URL, wherein the storage further stores, in association with the created URL, the login state detected by the detecting process; and a blog server to execute a procedure including a receiving, from the storage, the created URL transmitted based on storage of the trackback URL in the storage part.