JP2004030108A - Information distribution system, method for distributing information, and information distribution program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To control wasteful communication expenses and unnecessary labor by sending no wasteful duplicate messages having an identical description in delivering a message. <P>SOLUTION: Information distribution system distributing information on distribution of interest through a network to a specified distribution destination comprises: a reception section 1 receiving through the network the message sent from a customer requesting the distribution; an identical message detection section 4 detecting whether information having the identical description as that in the message received by the reception section 1 is received or not; and a notice message generation section 7 generating a notice informing that the information is received to the customer requesting the delivery when the identical message detection section 4 detects that the information having the identical description as that in the message is received. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an information distribution device, an information distribution method, and an information distribution program that collectively distribute information via a network.
[0002]
[Prior art]
Information distribution devices such as content distribution servers and mailing lists place a heavy load on server devices as users explode, and it takes several hours to receive messages from senders and complete distribution to all distribution destinations. What is needed is also beginning to occur.
[0003]
If the time until the delivery is too long, the sender thinks that the message has been lost halfway, and often sends the same message again. In this case, the load on the server device is further increased, and the distribution is further delayed. The slower the delivery, the more anxious the sender will be, and the same message will be resent many times, creating a vicious cycle.
[0004]
The server administrator has taken measures such as replacing the device with a higher-performance device or preparing a plurality of servers, but has not kept up with the increase in load. On the other hand, Japanese Patent Application Laid-Open No. 2001-285334 provides a mail server device capable of grasping the communication status of a mailing list.
[0005]
[Problems to be solved by the invention]
However, in this case, the sender cannot prevent duplicate transmission of the same mail, and as a result, the increase in the load on the mail server cannot be suppressed. Also, there are protocols such as MDN (Message Disposition Notification) and DSN (Delivery Status Notification) for notifying the arrival of a message. However, these are limited only when the sender desires the notification, and duplicated. Since it is applied to all mails including those that have not been sent, the effect of suppressing an increase in server load cannot be expected.
[0006]
[Means for Solving the Problems]
The present invention has been made to solve such a problem. That is, according to the present invention, in an information distribution apparatus that distributes distribution target information to a designated distribution destination via a network, a receiving unit that receives a message sent from the distribution requester via the network, and a receiving unit that receives the message via the network Message detection means for detecting whether or not information having the same content as the message has already been received. If the message detection means has detected that information having the same content as the message has already been received, the message is sent to the delivery requester. Notification means for notifying the user.
[0007]
Also, the present invention provides a step of receiving a message sent from a distribution requester via the network, a step of detecting whether or not information of the same content as the received message has already been received, and a step of detecting the same content as the message. And a process of notifying the distribution requester of the fact that the information distribution device has already received the information of the information distribution method.
[0008]
In the present invention, when a message is received, it is detected whether or not information having the same content as the message has already been received. Then, when the same information as the message is not received, a normal distribution process is performed. On the other hand, if information having the same content as the message has already been received, a notification is sent to the distribution requester who transmitted the message to the effect that duplicate transmission has been performed. Further, invalidation processing is performed on the duplicately transmitted message, and the server does not distribute the message.
[0009]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings. First, a first embodiment will be described. FIG. 1 is a block diagram showing an internal configuration of a mailing list distribution server which is an information distribution device according to the first embodiment.
[0010]
That is, the mailing list distribution server includes a reception unit 1, an address extraction unit 2, a storage unit 3, an identical message detection unit 4, an invalidation unit 5, an analysis unit 6, a notification message generation unit, a distribution message generation unit 8, and a transmission unit 9. Consists of
[0011]
In the mailing list distribution server, when a receiving unit 1 receives a message from a sender via a network (not shown), an address extracting unit 2 extracts a sender address and a destination mailing list address.
[0012]
Thereafter, the message is compared with past messages stored in the storage unit 3, and the same message detection unit 4 searches for the same message in the past. If the same message detection unit 4 finds the same message as the received message from the past messages stored in the storage unit 3, the received message is invalidated by the invalidation unit 5; The mailing list distribution process is not performed.
[0013]
Then, instead, a message for notifying that the same message has been found is generated by the notification message generation unit 7, and the notification message is transmitted from the transmission unit 9 to the sender address extracted by the address extraction unit 2. .
[0014]
On the other hand, if the same message detection unit 4 does not find the same message as the received message from the past messages stored in the storage unit 3, the received message is regarded as a new message, and An address extraction unit 2 extracts a destination address from the message, and an analysis unit 6 analyzes whether the destination address is a mailing list address.
[0015]
If the destination address is the address of the mailing list, a header of the message is generated to the recipient address registered in the mailing list, the body of the received message is combined with the header, and the delivery message is generated by the delivery message generator 8. The transmission message is generated from the transmission unit 9. Thereafter, the received message is stored in the storage unit 3. The received message is stored in the storage unit 3 regardless of whether the received message is invalidated or not.
[0016]
With such a mailing list distribution server, if the sender sends a duplicate message, the sender is notified that the message has not been sent again, and the message has already been sent to the server. It is possible to grasp that the message has arrived and to reduce the load on the server related to retransmission.
[0017]
Next, a second embodiment will be described. FIG. 2 is a block diagram illustrating an internal configuration of a content distribution server which is an information distribution device according to the second embodiment. That is, this content distribution server includes a reception unit 1, an address extraction unit 2, a storage unit 3, an identical message detection unit 4, an invalidation unit 5, an analysis unit 6, a notification message generation unit, a distribution message generation unit 8, and a transmission unit 9. , A content database 9.
[0018]
In the content distribution server, when a receiving unit 1 receives a message from a sender via a network (not shown), an address extracting unit 2 extracts a sender address and a destination address.
[0019]
Thereafter, the message is compared with past messages stored in the storage unit 3, and the same message detection unit 24 searches for the same message in the past. If the same message detection unit 24 finds the same message as the received message from the past messages stored in the storage unit 23, the received message is invalidated by the invalidation unit 5; The content distribution processing is not performed.
[0020]
Instead, a message for notifying that the same message has been found is generated by the notification message generation unit 7, and the notification message is transmitted from the transmission unit 9 to the sender address extracted by the address extraction unit 2. I do.
[0021]
On the other hand, if the same message detection unit 4 does not find the same message as the received message from the past messages stored in the storage unit 3, the received message is regarded as a new message, and The message is analyzed by the analysis unit 6, and the specified content is extracted from the content stored in the content database 30.
[0022]
Further, a header of the message is generated to the destination address extracted by the address extracting unit 2, the extracted content is attached to the body part and combined with the header, a distribution message is generated by the generation unit 8, and the distribution message is generated. The transmission is performed from the transmission unit 9. The received message is stored in the storage unit 23 whether or not the received message is invalidated.
[0023]
With such a content delivery server, if the sender sends a duplicate message, the sender is notified that the message has not been sent again, so the sender has already sent the message to the server. It is possible to grasp that the message has arrived and to reduce the load on the server related to retransmission.
[0024]
Next, a third embodiment will be described. FIG. 3 is a block diagram illustrating an information distribution device according to the third embodiment. This information distribution apparatus has a configuration in which the same sender message search unit 51 is added to the configuration of the content distribution server described in the second embodiment.
[0025]
When the receiving section 1 receives a message from a sender via a network (not shown), the content distribution server extracts a sender address and a destination address in an address extracting section 42.
[0026]
Thereafter, the same sender message search unit 51 searches for a message having the same sender address as the sender address from the past messages stored in the storage unit 43. If the same sender message is found by the same sender message search unit 51, the same message determination unit 4 compares the received message with the text of the same sender message.
[0027]
Then, when the same message determination unit 44 determines that the received message is the same message, the received message is invalidated by the invalidation unit 45, and the content distribution process is not performed.
[0028]
Instead, a message for notifying that the same message has been found is generated by the notification message generation unit 47, and the notification message is transmitted from the transmission unit 49 to the sender address extracted by the address extraction unit 42.
[0029]
On the other hand, if the same sender message search unit 51 does not find a message having the same sender, or if the same sender message search unit 51 finds the same sender message, When the same message determination unit 44 determines that the received message is not the same as the received message, the received message is regarded as a new message, and the message is analyzed by the analysis unit 46 and stored in the content database 30. Extracts the specified content from the content.
[0030]
Further, a header of the message is generated to the destination address extracted by the address extraction unit 2, the extracted content is attached to the body part and combined with the header, and a distribution message is generated by the distribution message generation unit 8 and distributed. The message is transmitted from the transmission unit 9. The received message is stored in the storage unit 3 regardless of whether the received message is invalidated or not.
[0031]
In such a content distribution server, in addition to the same effect as in the second embodiment, since the sender's message is searched in advance to determine whether the sender is the same as the already accepted message, duplicate transmission of the message is prevented. The burden of searching can be reduced.
[0032]
Next, a fourth embodiment will be described. FIG. 4 is a block diagram illustrating an information distribution device according to the fourth embodiment. This information distribution device has a configuration in which a search condition specifying unit 71 is added to the configuration of the content distribution server described in the second embodiment.
[0033]
In the content distribution server, when a receiving unit 1 receives a message from a sender via a network (not shown), an address extracting unit 2 extracts a sender address and a destination address.
[0034]
Thereafter, when comparing with past messages stored in the storage unit 3, the search is performed within the range of the condition specified by the search condition specifying unit 71. For example, if a condition within the past 24 hours is specified by the search condition specifying unit 71, it is determined whether or not the same message as the received message exists in the storage unit 3 only for the message received in the past 24 hours. The same message detection unit 64 searches.
[0035]
If the same message detection unit 4 finds the same message as the received message (matching the search condition) from the past messages stored in the storage unit 63, the received message is invalidated by the invalidation unit. At 65, invalidation processing is performed, and content distribution processing is not performed.
[0036]
Instead, a message for notifying that the same message has been found is generated by the notification message generation unit 67, and the notification message is transmitted from the transmission unit 69 to the sender address extracted by the address extraction unit 62.
[0037]
On the other hand, if the same message detection unit 4 does not find the same message as the received message from the past messages stored in the storage unit 3, the received message is regarded as a new message, and The analysis unit 6 analyzes and extracts the specified content from the content stored in the content database 30.
[0038]
Further, a header of the message is generated to the destination address extracted by the address extraction unit 2, the extracted content is attached to the body part, the header is synthesized, and a distribution message is generated by the distribution message generation unit 8, and the distribution message is generated. The message is transmitted from the transmission unit 9. The received message is stored in the storage unit 63 whether or not the received message is invalidated.
[0039]
In such a content distribution server, in addition to the same effect as in the second embodiment, since a search is performed from a message that satisfies conditions specified in advance, the burden of searching for duplicate transmission of a message can be reduced.
[0040]
Next, a fifth embodiment will be described. FIG. 5 is a block diagram illustrating an information distribution device according to the fifth embodiment. This information distribution device has a configuration in which a deletion unit 91 is added to the configuration of the content distribution server described in the second embodiment.
[0041]
In the content distribution server, when a receiving unit 1 receives a message from a sender via a network (not shown), an address extracting unit 2 extracts a sender address and a destination address.
[0042]
Thereafter, the message is compared with past messages stored in the storage unit 3, and the same message detection unit 4 searches for the same message in the past. If the same message detection unit 4 finds the same message as the received message from the past messages stored in the storage unit 3, the received message is invalidated by the invalidation unit 5, No distribution processing is performed.
[0043]
Instead, a message for notifying that the same message has been found is generated by the notification message generation unit 7, and the notification message is transmitted from the transmission unit 9 to the sender address extracted by the address extraction unit 2. At this time, the past message found as the same message is deleted from the storage unit 3 by the deletion unit 91.
[0044]
On the other hand, if the same message detection unit 4 does not find the same message as the received message from the past messages stored in the storage unit 3, the received message is regarded as a new message, and The analysis unit 6 analyzes and extracts the specified content from the content stored in the content database 30.
[0045]
Further, a header of the message is generated to the destination address extracted by the address extraction unit 2, the extracted content is attached to the body part and combined with the header, and a distribution message is generated by the distribution message generation unit 8, The distribution message is transmitted from the transmission unit 9. Then, the received message is stored in the storage unit 3.
[0046]
In such a content distribution server, in addition to the same effect as in the second embodiment, when a duplicate message is transmitted, only the latest message is left in the storage unit 3 and the old same message can be deleted. 3 can be used effectively.
[0047]
Next, a sixth embodiment will be described. FIG. 6 is a block diagram illustrating an information distribution device according to the sixth embodiment. This information distribution apparatus has a configuration in which a hash unit 112 is added to the configuration of the content distribution server described in the second embodiment.
[0048]
In the content distribution server, when a receiving unit 1 receives a message from a sender via a network (not shown), an address extracting unit 2 extracts a sender address and a destination address.
[0049]
Thereafter, a hash operation is performed in the hash unit 102 to obtain a hash value. Using this hash value, the hash value of the past message stored in the storage unit 103 is compared, and the same message detection unit 104 searches whether or not there is the same hash value as the past message. .
[0050]
If the same message detection unit 104 finds a message having the same hash value, the message body of the received message is compared with the message body of a past message determined to be equal to the hash value of the received message. Check if there is any.
[0051]
If the same message detection unit 4 finds the same message as the received message from the past messages stored in the storage unit 3, the received message is invalidated by the invalidation unit 5, No distribution processing is performed.
[0052]
Instead, a message for notifying that the same message has been found is generated by the notification message generation unit 7, and the notification message is transmitted from the transmission unit 9 to the sender address extracted by the address extraction unit 2. At this time, the past message found as the same message is deleted from the storage unit 3 by the deletion unit 91.
[0053]
On the other hand, if the same message search unit 4 does not find the same message as the received message from the past messages stored in the storage unit 3, the received message is regarded as a new message and The analysis unit 6 analyzes and extracts the specified content from the content stored in the content database 30.
[0054]
Further, a header of the message is generated to the destination address extracted by the address extraction unit 2, the extracted content is attached to the body part and combined with the header, and a distribution message is generated by the distribution message generation unit 8, The distribution message is transmitted from the transmission unit 9. Then, both the hash value corresponding to the received message and the actual received message are stored in the storage unit 3.
[0055]
In such a content distribution server, in addition to the same effects as in the second embodiment, a message to be repeatedly transmitted can be quickly searched by a hash value, and the burden on the server for duplicate transmission detection can be reduced.
[0056]
Next, a seventh embodiment will be described. FIG. 7 is a block diagram illustrating an information distribution device according to the seventh embodiment. This information distribution device has a configuration in which a lossless compression unit 132 is added to the configuration of the content distribution server described in the second embodiment.
[0057]
In the content distribution server, when a receiving unit 1 receives a message from a sender via a network (not shown), an address extracting unit 2 extracts a sender address and a destination address.
[0058]
Thereafter, compression is performed in the lossless compression unit 132. The compressed message is compared with a past compressed message stored in the storage unit 3 using the compressed message, and the same message detecting unit 4 searches for the same message in the past.
[0059]
If the same message detection unit 4 finds the same message as the received message from the past messages stored in the storage unit 3, the received message is invalidated by the invalidation unit 5, No distribution processing is performed.
[0060]
Instead, a message for notifying that the same message has been found is generated by the notification message generation unit 7, and the notification message is transmitted from the transmission unit 9 to the sender address extracted by the address extraction unit 2. At this time, past messages found as the same message are deleted from the storage unit 3 by the deletion unit 91.
[0061]
On the other hand, if the same message detection unit 4 does not find the same message as the received message from the past messages stored in the storage unit 3, the received message is regarded as a new message, and The analysis unit 6 analyzes and extracts the specified content from the content stored in the content database 30.
[0062]
Further, a header of the message is generated to the destination address extracted by the address extraction unit 2, the extracted content is attached to the body part and combined with the header, and a distribution message is generated by the distribution message generation unit 8, The distribution message is transmitted from the transmission unit 9. Then, the message compressed by the lossless compression section 132 is stored in the storage section 123.
[0063]
In such a content distribution server, in addition to the same effects as in the second embodiment, the redundantly transmitted message can be searched quickly by lossless compression, and the stored data is also compressed, so that the server performs redundant transmission. The burden on detection can be reduced and the capacity of the storage unit 3 can be effectively used.
[0064]
Next, a processing flow (information distribution method) of the information distribution apparatus corresponding to each of the above embodiments will be described. FIG. 8 is a flowchart illustrating the flow of the process of the information distribution device.
[0065]
First, when a message is received in the message receiving step S201, a sender address and a destination address are extracted from the received message in an address extracting step S202. The received message is stored in the storing step S203. Thereafter, in the same message detection step S204, it is determined whether there is a message having the same text as the received message among the messages received and stored in the past.
[0066]
If it is determined that the same message exists, in the invalidation step S205, the received message is subjected to invalidation processing, and processing such as distribution is not performed on this message. Instead, a notification message notifying that the same message is present is generated in the notification message generation step S206, with the sender address extracted in the address extraction step S202 as a destination, and transmitted in the message transmission step S208. Is done.
[0067]
If it is determined that the same message does not exist, a delivery message is generated in the delivery message generation step S207 using the destination address extracted in the address extraction step S202, and transmitted in the message transmission step S208.
[0068]
FIG. 9 is a flowchart illustrating the same message detecting step in FIG. 8 in more detail. First, in S240, it is determined whether an uncompared stored message still remains.
[0069]
If not, it is determined that the same message does not exist, and the same message detecting process is terminated. On the other hand, if there is an uncompared stored message, the next new stored message is regarded as a comparison target in S241.
[0070]
Next, in S242, it is determined whether the text of the received message matches the text to be compared. If they match, it is determined that the same message exists, and the same message detection process ends. On the other hand, if they do not match, the process returns to S240.
[0071]
FIG. 10 is a flowchart illustrating the same message detecting step in the information distribution device according to the third embodiment in more detail. First, in S250, it is determined whether an uncompared stored message still remains. If not, it is determined that the same message does not exist, and the same message detecting process is terminated. On the other hand, if there is an uncompared stored message, the next new stored message is regarded as a comparison target in S251.
[0072]
Next, in S252, a comparison is made as to whether the sender address of the received message matches the sender address to be compared. If they do not match, the process returns to S250. If they match, in step S253, the same text to be compared is compared with the text of the received message. If they match, it is determined that the same message exists, and the same message detection process ends. If they do not match, the process returns to S250.
[0073]
FIG. 12 is a flowchart illustrating the same message detecting step in the information distribution device according to the fourth embodiment. In the search condition specifying step S280, for example, if it is specified that only messages accumulated within the past 24 hours are to be targeted, it is determined whether uncompared accumulated messages still remain among the messages accumulated within the past 24 hours. judge.
[0074]
If not, it is determined that the same message does not exist, and the same message detecting process is terminated. On the other hand, if there is an uncompared stored message among the messages stored within the past 24 hours, the next new stored message is regarded as a comparison target in S281. In S282, it is determined whether the text of the received message matches the text to be compared. If they match, it is determined that the same message exists, and the same message detection process ends. On the other hand, if they do not match, the process returns to S280.
[0075]
FIG. 11 is a flowchart illustrating a flow of a process of the information distribution device according to the fifth embodiment. First, when a message is received in the message receiving step S261, a sender address and a destination address are respectively extracted from the received message in an address extracting step S262.
[0076]
In addition, the received message is stored in the storing step S263. Thereafter, in the same message detecting step S264, it is determined whether or not there is a message having the same text as the received message among the messages received and stored in the past.
[0077]
If it is determined that the same message exists, in the invalidation step S265, the received message is subjected to invalidation processing, and the received message is not subjected to processing such as distribution. Then, the past message determined to be the same message is deleted in the deletion step S266.
[0078]
Next, with the sender address extracted in the address extraction step S262 as a destination, a notification message for notifying that the same message is present is generated in a notification message generation step S267, and transmitted in the message transmission step S269. You. If it is determined that the same message does not exist, a delivery message is generated in the delivery message generation step S268 using the destination address extracted in the address extraction step S262, and transmitted in the message transmission step S269.
[0079]
FIG. 13 is a flowchart illustrating a flow of processing of the information distribution device according to the sixth embodiment. First, when a message is received in the message receiving step S301, a sender address and a destination address are extracted from the received message in an address extracting step S302.
[0080]
Next, a hash value is calculated for the received message in a hash step S310. Thereafter, in the accumulation step S303, both the received message itself and the hash value calculated in the hash step S310 are accumulated.
[0081]
Next, in the same message detection step S304, it is determined whether there is a message having the same text as the received message among the messages received and stored in the past, the details of which will be described later with reference to FIG. Is done.
[0082]
If it is determined that the same message exists, in the invalidation step S305, the received message is invalidated, and the message is not subjected to processing such as distribution. Instead, a notification message notifying that the same message is present is generated in the notification message generation step S306 with the sender address extracted in the address extraction step S302 as the destination, and transmitted in the message transmission step S308. Is done.
[0083]
On the other hand, if it is determined that the same message does not exist, a delivery message is generated in the delivery message generation step S307 using the destination address extracted in the address extraction step S302, and transmitted in the message transmission step S308.
[0084]
FIG. 14 is a flowchart for explaining the same message detecting step S304 in FIG. 13 in detail. First, in S320, it is determined whether an uncompared stored message still remains.
[0085]
If not, it is determined that the same message does not exist, and the same message detecting process is terminated. On the other hand, if there is an uncompared stored message, the next new stored message is regarded as a comparison target in S321.
[0086]
Next, in S322, it is determined whether the hash value of the received message matches the hash value of the comparison target. If they do not match, the process returns to S320. If they match, the main body of the same comparison target is compared with the main body of the received message in S323. If they match, it is determined that the same message exists, and the same message detection process ends. If they do not match, the process returns to S320.
[0087]
FIG. 15 is a flowchart illustrating a flow of a process of the information distribution device according to the seventh embodiment. First, when a message is received in the message receiving step S341, a sender address and a destination address are extracted from the received message in an address extracting step S342.
[0088]
The received message is compressed in the lossless compression step S343, and the compressed received message is stored in the storage step S344. Thereafter, in the same message detecting step S345, it is determined whether there is a message having the same text as that of the received message among the messages received and stored in the past in the compressed state together.
[0089]
If it is determined that the same message exists, in the invalidation step S346, the received message is subjected to invalidation processing, and processing such as distribution is not performed on this message. Instead, with the sender address extracted in the address extraction step S342 as a destination, a notification message notifying that the same message is present is generated in a notification message generation step S347, and transmitted in the message transmission step S349. Is done.
[0090]
On the other hand, if it is determined that the same message does not exist, a delivery message is generated in the delivery message generation step S348 using the destination address extracted in the address extraction step S342, and transmitted in the message transmission step S349.
[0091]
The above-described processing flow can be realized as a computer-executable program. This program can be recorded on a recording medium such as a CD-ROM and distributed, or distributed via a network. It is possible.
[0092]
【The invention's effect】
As is apparent from the above description, according to the present invention, the sender is notified of the transmission of the duplicate message, and thereafter does not need to transmit a redundant message of the same content, so that the communication cost and Useless labor can be suppressed. On the server side, an increase in load is suppressed by reducing unnecessary duplicate messages. In addition, the recipient who receives the message distribution does not receive the same message redundantly, so that it is possible to avoid unnecessary work for receiving and storing and wasteful consumption of storage.
[Brief description of the drawings]
FIG. 1 is a block diagram illustrating a first embodiment.
FIG. 2 is a block diagram illustrating a second embodiment.
FIG. 3 is a block diagram illustrating a thirty-first embodiment.
FIG. 4 is a block diagram illustrating a fourth embodiment.
FIG. 5 is a block diagram illustrating a fifth embodiment.
FIG. 6 is a block diagram illustrating a sixth embodiment.
FIG. 7 is a block diagram illustrating a seventh embodiment.
FIG. 8 is a flowchart illustrating a flow of a process of the information distribution device.
FIG. 9 is a flowchart illustrating the same message detection step in more detail.
FIG. 10 is a flowchart illustrating the same message detecting step in the information distribution device according to the third embodiment in more detail.
FIG. 11 is a flowchart illustrating a flow of a process of an information distribution device according to a fifth embodiment.
FIG. 12 is a flowchart illustrating an identical message detection step in the information distribution device according to the fourth embodiment.
FIG. 13 is a flowchart illustrating a flow of a process of an information distribution device according to a sixth embodiment.
FIG. 14 is a flowchart illustrating in detail an identical message detection step in the information distribution device according to the sixth embodiment.
FIG. 15 is a flowchart illustrating a flow of a process of the information distribution device according to the seventh embodiment.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Receiving part, 2 ... Address extraction part, 3 ... Storage part, 4 ... Same message detection part, 5 ... Invalidation part, 6 ... Analysis part, 7 ... Notification message generation part, 8 ... Delivery message generation part, 9 ... Transmission unit, 30: Content database, 51: Same sender message search unit, 71: Search condition specification unit, 91: Deletion unit, 112: Hash unit, 132: Loss hero compression unit

Claims (9)

In an information distribution device that distributes distribution target information to a designated distribution destination via a network,
Receiving means for receiving a message sent from the distribution requester via the network,
Message detection means for detecting whether or not information of the same content as the message received by the reception means has already been received,
If the message detecting means detects that information having the same content as the message has already been received, a notifying means for notifying the distribution requester of the fact is provided. Transmitting means for distributing, via a network, information corresponding to a message sent from the distribution requester to the distribution destination if the message detecting means does not detect that information having the same content as the message has already been received; The information distribution apparatus according to claim 1, further comprising: When the message detecting means detects that information having the same content as the message has already been received, invalidation processing is performed to invalidate information corresponding to the message sent from the distribution requester so as not to be distributed via the network. The information distribution device according to claim 1, further comprising: a conversion unit. The same sender search means for searching the delivery source address of the delivery requester from the delivery source address of the information already received,
The message detecting means detects whether or not information having the same content as the message has already been received only when the same sender address is found in the same sender searching means. Item 4. The information distribution device according to any one of Items 3. A search condition specifying means for specifying a predetermined search condition;
2. The method according to claim 1, wherein the message detection unit detects whether or not information having the same content as the message has already been received only when the search condition specified by the search condition specification unit is satisfied. 4. The information distribution device according to any one of 4. 6. The apparatus according to claim 1, further comprising a deletion unit configured to delete the already received information when the message detection unit detects that the same information as the message has already been received. The information distribution device according to any one of the above. It has a conversion means for converting the information corresponding to the message received by the receiving means under predetermined conditions,
7. The method according to claim 1, wherein the message detection unit detects whether information having the same content as the message has already been received, using the information converted by the conversion unit. An information distribution device according to any one of the claims. In an information distribution method for distributing distribution target information to a designated distribution destination via a network,
Receiving a message sent from the distribution requester via the network;
Detecting whether or not information of the same content as the received message has already been received,
A step of, when detecting that information having the same content as the message has already been received, notifying the distribution requester of the fact. In an information distribution program that distributes distribution target information to a designated distribution destination via a network,
Receiving a message sent from the distribution requester via the network;
Detecting whether or not information of the same content as the received message has already been received,
When detecting that information having the same content as the message has already been received, causing the computer to execute the step of notifying the distribution requester of the fact.

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