JP5442541B2 - WEB information acquisition method and apparatus - Google Patents

Description

  In the present invention, a WEB browsing apparatus (for example, a personal computer or a portable terminal, hereinafter referred to as “PC”) on a network receives WEB content information (hereinafter referred to as “WEB information”) from a WEB providing apparatus (hereinafter referred to as “WEB server”). At the time of acquisition, a prefetching proxy server that prefetches and acquires the WEB information requested by the PC is installed in the network between the PC and the WEB server, and the prefetching proxy server WEB instead of the WEB server in response to the request from the PC The present invention relates to a WEB information acquisition method and apparatus for transferring information to a PC and shortening the WEB information acquisition time.

  When a PC browses WEB information from a WEB server on a network such as the Internet, the WEB server uses WEB information to the PC using HTML (HyperText Markup Language) according to the HTTP (Hypertext Transfer Protocol) communication protocol. Is transmitted. For example, when the file index.html provided by the WEB server byte.tokkyo.co.jp is acquired by HTTP, the WEB information is read out at the address http://byte.tokkyo.co.jp/index.html. it can. When reading the WEB information, the user generally reads the WEB information by designating an address using a program for browsing the WEB information (hereinafter referred to as “browser”). In the PC, when the user inputs an address, the browser issues a page request to the WEB server. The WEB server receives this page request transmitted via the network, and transmits the WEB information of the requested page to the PC via the network. In this way, each time a page request is received from the user, the browser of the PC acquires the corresponding page via the network.

  In recent years, there has been a demand for shortening the time from when a PC user requests acquisition of WEB information to when the WEB information is given to the PC. In response to this, Non-Patent Document 1, Patent Document 1, and Patent Document 2 disclose a technique for prefetching WEB information.

  In this prefetching technique, as shown in FIG. 8, a prefetching proxy server is interposed between the WEB server and the PC, and the prefetching proxy server prefetches WEB information. When the prefetch proxy server receives the request data (get1) for acquiring the WEB information from the PC to the WEB server, the prefetch proxy server acquires the WEB information (data1) corresponding to the request data from the WEB server and transfers it to the PC. . At this time, the prefetching proxy server analyzes the WEB information (html file) described in the WEB information (data1), and based on the WEB information (data1), the prefetching predicted that the PC that receives the WEB information (data1) will request from the next time onward. Request data (get2) for requesting the target WEB information is transmitted to the WEB server, and the WEB information (data2) corresponding to the request data is acquired and stored. Next, when the prefetch proxy server receives the WEB information request data (get2) from the PC, the prefetch proxy server transfers the stored WEB information (data2) to the PC without transferring get2 to the WEB server.

  The prefetched WEB information is WEB information defined by a URL described in the WEB information (html file) requested from the PC. As a result, the WEB server receives the same prefetch target request from the prefetch proxy server before the WEB information request issued by the PC arrives at the WEB server, and issues the WEB information to the PC correspondingly. Since the PC obtains the WEB information from the prefetch proxy server, the acquisition time of the WEB information is shortened.

JP 2000-132481 A JP 2001-142769 A

Paper NAIST-MT351067 ("Proposal for Speeding Up Information Acquisition on WWW" Kenichi Chinen, Nara Institute of Science and Technology, Graduate School of Information Science, submitted on February 20, 1995)

  By the way, in the conventional prefetching technique, the network delay time between the prefetching proxy server and the PC becomes a problem. For example, when the network delay time between the prefetching proxy server and the PC is large, even if the prefetching proxy server prefetches and accumulates the WEB information (data2) for the request data (get2), the WEB information (data2) ) Is transferred to the PC with respect to the request data (get2) from the PC, and the merit of prefetching cannot be utilized. On the other hand, when the delay time between the WEB server and the prefetching proxy server is large, the arrival of the WEB information (data2) for the request data (get2) transmitted from the WEB server to the prefetching proxy server is delayed and data2 is transferred to the PC. It takes time to do so and the benefits of prefetching cannot be used.

  It is an object of the present invention to provide a WEB information acquisition method and apparatus in which a prefetch proxy server makes a prefetch request and can quickly provide the acquired prefetch web information in response to a request from a PC.

In the first invention, a WEB server, a prefetching proxy server, and a WEB browsing device are installed via a plurality of network systems, the WEB browsing device transmits request data to the WEB server, and the prefetching proxy server is a WEB browsing The request data transmitted from the apparatus is transferred to the WEB server, the WEB server transmits the WEB information corresponding to the request data, and the prefetch proxy server transfers the WEB information transmitted from the WEB server to the WEB browsing apparatus. The request data included in the WEB information is extracted, transmitted to the WEB server as pre-read request data, the corresponding WEB information is pre-read from the WEB server, and the WEB browsing device pre-reads the request data included in the WEB information. The prefetch proxy server that sent the server and received the request data receives the request data. Without transferring to the EB server, the WEB information acquisition method to transfer the prefetched WEB information, a read-ahead proxy server installed in a network system delay time between the WEB server is small among a plurality of network system, a plurality of network systems among established the information storage server in a small network system delay time between the WEB browsing device, prefetching proxy server is configured to send all information content of the requested data read-ahead extracted from WEB information collectively to the information storage server The prefetched WEB information is transferred to the information accumulation server, and the information accumulation server accumulates the prefetch request data and the prefetch web information transmitted from the prefetch proxy server, and prefetches the request data transmitted from the web browsing device. If it is stored as request data, the request data Is not transferred to the prefetching proxy server, the prefetched WEB information corresponding to the request data is transmitted to the WEB browsing device, and the request data transmitted from the WEB browsing device is not stored as the prefetched request data. Transfer the data to the prefetch proxy server.

  In the WEB information acquisition method of the first invention, when the WEB information is an html file, the prefetch proxy server and the information accumulation server extract request data included in the html file, and the prefetch proxy server extracts the request data Used to pre-read WEB information.

  In the WEB information acquisition method of the first invention, the information storage server discards the request data when the WEB information corresponding to the request data transmitted from the WEB browsing device is transmitted to the WEB browsing device.

According to a second aspect of the present invention, a WEB server that transmits WEB information corresponding to the request data, the request data is transferred to the WEB server, the WEB information transmitted from the WEB server is transferred, and the request data included in the WEB information Is extracted and transmitted to the WEB server as prefetch request data, the prefetch proxy server that prefetches the corresponding WEB information, and the request data is transmitted to the WEB server via the prefetch proxy server, and the WEB information is transmitted via the prefetch proxy server. In the WEB information acquisition apparatus, in which a WEB server, a prefetching proxy server, and a WEB browsing apparatus are installed via a plurality of network systems, a delay time with the WEB server among the plurality of network systems Install a prefetch proxy server in a small network system and An information storage server is installed in a network system with a small delay time with the WEB browsing device in the network system, and the prefetching proxy server collectively collects all the information of the prefetch request data extracted from the WEB information to the information storage server. A function of transmitting the pre-read WEB information to the information storage server , the information storage server stores the pre-read request data and the pre-read WEB information transmitted from the pre-read proxy server, and from the WEB browsing device If the transmitted request data is stored as prefetch request data, the request data is not transferred to the prefetch proxy server, but the prefetch web information corresponding to the request data is transmitted to the web browsing device, and the web browsing device is transmitted. If the request data sent from is not stored as read-ahead request data A function of transferring the requested data to the prefetch proxy server.

  In the WEB information acquisition apparatus of the second invention, when the WEB information is an html file, the prefetch proxy server and the information storage server extract request data included in the html file, and the prefetch proxy server extracts the request data This is a configuration for prefetching web information.

  In the WEB information acquisition apparatus of the second invention, the information storage server is configured to discard the request data when the WEB information corresponding to the request data transmitted from the WEB browsing apparatus is transmitted to the WEB browsing apparatus.

  The present invention transfers the WEB information prefetched from the WEB server by the prefetching proxy server installed in the network with a small delay time with the WEB server to the information storage server installed in the network system with a small delay time with the WEB browsing device. Then, the information storage server responds to the request from the WEB browsing apparatus, so that the WEB browsing apparatus can quickly acquire the pre-read WEB information.

It is a figure which shows the Example structure of the WEB information acquisition apparatus of this invention. It is a figure which shows Example 1 of the process sequence of the WEB information acquisition apparatus of this invention. It is a figure which shows Example 2 of the process sequence of the WEB information acquisition apparatus of this invention. 2 is a diagram illustrating a configuration example of a prefetch proxy server 20. FIG. 4 is a flowchart showing a processing procedure of a prefetch proxy server 20. 2 is a diagram illustrating a configuration example of an information storage server 30. FIG. 4 is a flowchart showing a processing procedure of the information storage server 30. It is a figure which shows the processing sequence of the conventional WEB information acquisition apparatus.

FIG. 1 shows an embodiment of the WEB information acquisition apparatus according to the present invention.
In FIG. 1, the WEB server 11 is connected to the Internet 12. A PC 13, which is an example of a WEB browsing apparatus, is connected to the Internet 12 via a LAN 14 and a long delay network 15. A gateway GW is arranged at a connection point of each network. Here, the long delay network 15 is a so-called WAN (Wide Area Network) that interconnects remote computers using, for example, a broadband wireless system, a satellite line, or the like. A longer delay time than that of the LAN 14 occurs.

  The prefetch proxy server 20 used in the present invention is connected from the long delay network 15 to a predetermined position on the WEB server 11 side, for example, the Internet 12 or between the Internet 12 and the long delay network 15. On the other hand, the information storage server 30 characterized by the present invention is connected to the LAN 14 to which the PC 13 is connected. That is, the time for the PC 13 to access each server becomes shorter in the order of the WEB server 11, the prefetching proxy server 20, and the information storage server 30.

  FIG. 2 shows an example 1 of a processing sequence of the WEB information acquisition apparatus of the present invention. Here, the request data for the PC 13 to browse the WEB information data1 to data4 of the WEB server 11 is set to get1 to get4. The WEB server 11 outputs WEB information data1 to data4 according to get1 to get4. It is assumed that data1 is an html file, and includes data get2, get3, and get4 requested by the PC 13. Data2 to data4 are text files, image data, and the like, and do not include prefetched request data.

  In FIG. 2, the PC 13 transmits request data get 1 to the WEB server 11. The information storage server 30 and the prefetching proxy server 20 extract and store get1 respectively, and transfer get1 toward the WEB server 11.

  The WEB server 11 transmits data1 (html file) corresponding to get1 to the PC 13. Since the prefetch proxy server 20 and the information storage server 30 store get1 corresponding to data1, the data1 is transferred to the PC 13 as it is. Further, the prefetch proxy server 20 extracts (prefetchs) get2 and get3 which are request data predicted to be requested when the PC 13 receives this data1. Here, it is assumed that get4 is not extracted. Further, the prefetching proxy server 20 notifies the information storage server 30 of the prefetch request data get2 and get3 as prefetched contents in the future (collective notification of a prefetch notification signal). Here, the prefetched request data get 2 is transmitted to the WEB server 11. Note that the transmission timing and transmission order of the request data get2 and get3 prefetched to the WEB server 11 are arbitrary, and get2 and get3 may be simultaneous, or get3 may be first. The information accumulation server 30 accumulates the contents of the prefetch request data get2 and get3 notified from the prefetch proxy server 20 to be prefetched.

  The WEB server 11 transmits data2 corresponding to the prefetch request data get2 to the PC 13 via the prefetch proxy server 20. The prefetching proxy server 20 intercepts the prefetched data2 with respect to the prefetching request data get2, and transfers it to the information storage server 30. The information accumulation server 30 accumulates the prefetched data2 with respect to the prefetched request data get2, and receives the request data get2 issued from the PC 13, and checks whether or not it is accumulated. In the example of FIG. 2, since the request data get2 has not been received from the PC 13, the prefetched data2 is kept accumulated.

  On the other hand, the PC 13 receives the data 1 and transmits the get 2 first to the WEB server 11 among the get 2 to get 4 included in the data 1. When the information storage server 30 receives the request data get2, the information storage server 30 determines whether or not get2 is stored. Here, since the information storage server 30 has already accumulated get2 as prefetch request data, it is determined that data2 corresponding to get2 has already been prefetched, and the get2 is not transmitted to the WEB server 11. , Data2 is checked. Here, since the information storage server 30 has already stored data2 transferred from the prefetching proxy server 20, the information storage server 30 transmits data2 corresponding to get2 to the PC 13, and discards get2.

  Next, the PC 13 transmits the request data get 3 to the WEB server 11. When the information storage server 30 receives the request data get3, the information storage server 30 determines whether or not get3 is stored. Here, since the information storage server 30 has already accumulated get3 as prefetch request data, it is determined that data3 corresponding to get3 has already been prefetched, and the get3 is not transmitted to the WEB server 11. , Data3 is checked. Here, the information storage server 30 is on standby because it has not received the prefetched data3.

  On the other hand, the WEB server 11 transmits data3 corresponding to the prefetch request data get3 transmitted from the prefetch proxy server 20 to the PC 13 via the prefetch proxy server 20. The prefetch proxy server 20 transfers data3 corresponding to the prefetch request data get3 to the information storage server 30. The information accumulation server 30 accumulates the prefetched data3 with respect to the prefetched request data get3, and receives the request data get3 from the PC 13 and confirms whether or not it is accumulated. Here, since the request data get3 has already been received from the PC 13, the information storage server 30 transmits data3 corresponding to the request data get3 to the PC 13, and discards get3.

  Next, the PC 13 transmits the request data get 4 to the WEB server 11. When the information storage server 30 receives the request data get4, the information storage server 30 determines whether or not get4 is stored. Here, since it is not included in the prefetch notification signal received from the prefetch proxy server and the prefetch process for get4 is not performed, the information storage server 30 transfers the request data get4 to the WEB server 11. The get 4 reaches the WEB server 11 via the prefetching proxy server 20.

  The WEB server 11 transmits data4 corresponding to the request data get4 to the PC 13 via the prefetching proxy server 20, and since the data4 is a data file, it passes through the prefetching proxy server 20 and reaches the information storage server 30. Since the information storage server 30 has already received the request data get 4 from the PC 13, the information storage server 30 transmits data 4 corresponding to get 4 to the PC 13.

FIG. 3 shows a second example of the processing sequence of the WEB information acquisition apparatus of the present invention.
The example 1 shown in FIG. 2 is a case where the request data is transmitted to the WEB server 11 in the order of get2, get3, and get4 among the get2 to get4 included in the data 1 in the PC 13. This is for transmission in the order of get2 and get4.

  The information storage server 30 receives and stores prefetched data 2 before the request data get 2 arrives from the PC 13. After that, if prefetched data3 is received, request data get3 corresponding to data3 has already been obtained from PC13, so data3 is immediately transmitted to PC13 and get3 is discarded. Thereafter, when the information storage server 30 receives the request data get2 transmitted by the PC 13, the information storage server 30 transmits the stored data2 to the PC 13.

  Here, since the prefetched data 2 and data 3 are stored in the prefetch proxy server 20 conventionally, it is necessary to access the prefetch proxy server 20 from the PC 13 via the long delay network system 15, and the delay time between them becomes long. It was. On the other hand, in the WEB information acquisition apparatus of the present invention, the prefetched data 2 and data 3 are stored in the information storage server 30 in front of the long delay network system 15, so the PC 13 stores data 2 corresponding to get 2 and get 3 included in data 1. , Data3 can be acquired from the information storage server 30. That is, the information storage server 30 does not need to transfer get2 and get3 to the prefetching proxy server 20, and only the time for which get2 and data2, and get3 and data3 reciprocate through the long delay network system 15 respectively. Shortening becomes possible.

FIG. 4 shows a configuration example of the prefetch proxy server 20.
In FIG. 4, the network interface unit 21 distributes the received signal to the request data receiving unit 22 or the WEB information analyzing unit 26 according to the transmission source and destination of the received signal. The request data receiving unit 22 receives a signal transmitted from the PC 13 to the WEB server 11, extracts request data from the received signal, and outputs the request data to the request data comparing unit 23.

  The request data comparison unit 23 compares the request data extracted by the request data reception unit 22 with the request data stored in the request data storage unit 24, and the request data extracted by the request data reception unit 22 is the request data. If it is not stored in the storage unit 24 (in the case of get 1 and get 4 shown in FIGS. 2 and 3), the request data is transmitted to the WEB server 11 via the request data transmission unit 25 and the network interface unit 21. The data is stored in the request data storage unit 24. When the request data extracted by the request data receiving unit 22 is stored in the request data storage unit 24, the request data received from the PC 13 is discarded.

  The WEB information analysis unit 26 receives the WEB information transmitted by the WEB server 11 according to the request data, and transmits it to the PC 13 via the WEB information transmission unit 27 and the network interface unit 21. Further, if the WEB information is an html file, the WEB information analysis unit 26 extracts request data (get2, get3 shown in FIGS. 2 and 3) predicted to be requested by the PC 13 that receives the WEB file, and requests for prefetching. The data is stored in the request data storage unit 24 as data. Further, the WEB information analysis unit 26 transmits the prefetch request data to the WEB server 11 via the request data transmission unit 25 and the network interface unit 21 at an arbitrary timing and order.

  When the same request data as the pre-read request data stored in the request data storage unit 24 arrives from the PC 13, the request data has already entered the pre-ready state. It will be discarded.

FIG. 5 shows a processing procedure of the prefetch proxy server 20.
In FIG. 5, the prefetch proxy server 20 confirms the transmission source and destination of the received signal (S11). If the transmission source of the received signal is the PC 13 and the destination is the WEB server 11, request data is extracted from the received signal (S12). Next, it is determined whether or not the extracted request data exists in the request data storage unit 24 (S13). If the request data does not exist (S13: No), the request data is directed to the WEB server 11. And is stored in the request data storage unit 24 (S14). On the other hand, when the request data exists in the request data storage unit 24 (S13: Yes), the request data is discarded (S15).

  When the transmission source of the received signal is the WEB server 11 and the destination is the PC 13, it is determined whether or not the WEB information is the WEB file sent by the WEB server 11 in response to the request data (S16). . Here, if the WEB information is an html file, the request data predicted to be requested by the PC 13 receiving the html file is extracted and stored in the request data storage unit 24 as pre-read request data (S17). Next, the WEB information is transferred to the PC 13, and then all of the prefetch request data is collectively notified to the information storage server 20 (S19). Further, the prefetch request data stored in the request data storage section 24 is transmitted. At the same time, any number in any order and order is transmitted to the WEB server 11 (S19). On the other hand, if the WEB information sent from the WEB server 11 is not an html file, the WEB information is transmitted to the PC 13 (S20), and the process is terminated.

FIG. 6 shows a configuration example of the information storage server 30.
In FIG. 6, the network interface unit 31 distributes the received signal to the request data receiving unit 32, the WEB information analyzing unit 36, or the prefetch request data receiving unit 37 according to the transmission source and destination of the received signal. The request data receiving unit 32 receives a signal transferred from the PC 13 to the WEB server 11, extracts the request data, and outputs the request data to the request data comparison unit 33.

  The request data comparison unit 33 inquires whether the request data extracted by the request data reception unit 32 is stored in the request data storage unit 34, and request data that requests the same WEB information is stored in the request data storage unit 34. If not (in the case of get 1 and get 4 in FIGS. 2 and 3), the request data is output to the request data sending unit 35 and stored in the request data storage unit 34. When request data that requests the same WEB information as the request data extracted by the request data receiving unit 32 is stored in the request data storage unit 34 (in the case of get 2 and get 3 in FIGS. 2 and 3), The WEB information accumulation unit 36 is inquired as to whether or not the WEB information (data 2 and data 3 in FIGS. 2 and 3) is accumulated, and if it is accumulated, the web information accumulation unit 36 is instructed to output it to the PC 13.

  The request data transmission unit 35 transmits the request data input from the request data comparison unit 33 to the WEB server 11 via the network interface unit 31.

  The prefetch request data receiving unit 37 receives prefetch request data (get 2 and get 3 in FIGS. 2 and 3) notified from the prefetch proxy server 20 and accumulates them in the request data accumulation unit 34.

  The WEB information storage unit 36 stores the WEB information transferred from the prefetching proxy server 20, and stores request data (get 2) corresponding to the WEB information (data 2 in FIGS. 2 and 3) in the request data storage unit 34. If the request data corresponding to the WEB information is not accumulated, the process waits as it is. On the other hand, when the request data (get3) corresponding to the WEB information (data3 in FIGS. 2 and 3) is accumulated, the WEB information is output to the WEB information transmission unit 38. In addition, the WEB information storage unit 36 outputs WEB information corresponding to the prefetched request data to the WEB information transmission unit 38 according to an instruction from the request data comparison unit 33 and discards the request data from the request data storage unit 34.

  The WEB information transmission unit 38 transmits the WEB information input from the WEB information storage unit 37 to the PC 13 via the network interface unit 31.

FIG. 7 shows a processing procedure of the information storage server 30.
In FIG. 7, the information storage server 30 confirms the transmission source and destination of the received signal (S21). If the source of the received signal is the PC 13 and the destination is the WEB server 11, request data is extracted from the received signal (S22). Next, it is determined whether or not the extracted request data exists as request data for requesting the same web information from the request data storage unit 34 (S23). If the extracted request data does not exist (get1 in FIGS. 2 and 3). , Get4) (S23: No), the request data is transmitted to the WEB server 11 (S24) and stored in the request data storage unit 34 (S25). On the other hand, if the request data storage unit 34 has prefetched request data (in the case of get2 and get3 in FIGS. 2 and 3) (S23: Yes), the request data is discarded (S26). Further, it is determined whether or not the WEB information (data2) corresponding to the request data (get2) exists in the WEB information storage unit 36 (S27), and if it exists, the WEB information corresponding to the request data (get2). (Data2) is transmitted to the PC 13, and the WEB information is deleted (S28).

  When the transmission source of the received signal is the WEB server 11 and the destination is the PC 13, it is the WEB information sent by the WEB server 11 according to the request data, the WEB information is stored, and the request data corresponding to the stored WEB information is stored. Extract (S29). Next, it is determined whether or not the extracted request data exists as request data in the request data storage unit 34 (S30). If the extracted request data exists (S30: Yes), the WEB information is stored in the PC 13. The WEB information is deleted (S31). Further, the request data for the WEB information is discarded (S32). On the other hand, when the extracted request data does not exist (in the case of get2 in FIGS. 2 and 3) (S30: No), the WEB information (data2) is continuously accumulated. This WEB information (data2) is transmitted to the PC 13 when get2 is received from the PC 13 in steps S23 to S28.

  When the transmission source of the received signal is the prefetch proxy server 20 and the destination is the information storage server 30, the received signal is prefetch request data (get2, get3 in FIGS. 2 and 3) sent from the prefetch proxy server 20. The prefetch request data receiving unit 37 receives and stores it in the request data storage unit 34 (S33).

11 WEB server 12 Internet 13 PC
14 LAN
DESCRIPTION OF SYMBOLS 15 Long delay network system 20 Prefetching proxy server 21 Network interface part 22 Request data receiving part 23 Request data comparison part 24 Request data storage part 25 Request data transmission part 26 WEB information analysis part 27 WEB information transmission part 30 Information storage server 31 Network interface Unit 32 Request data receiving unit 33 Request data comparison unit 34 Request data storage unit 35 Request data transmission unit 36 WEB information storage unit 37 Prefetch request data reception unit 38 WEB information transmission unit

Claims (6)

A WEB server, a prefetching proxy server, and a WEB browsing device are installed via a plurality of network systems.
The WEB browsing device transmits request data to the WEB server, the prefetching proxy server transfers the request data transmitted from the WEB browsing device to the WEB server, and the WEB server Send WEB information corresponding to the data,
The prefetch proxy server transfers the WEB information transmitted from the WEB server to the WEB browsing apparatus, extracts request data included in the WEB information, and transmits the request data to the WEB server as prefetch request data. Pre-read the corresponding WEB information from the WEB server,
The WEB browsing device transmits the request data included in the WEB information to the prefetch proxy server, and the prefetch proxy server that has received the request data does not forward the request data to the WEB server, but the prefetch in WEB information acquisition method to transfer the WEB information,
The prefetch proxy server is installed in a network system having a small delay time with the WEB server among the plurality of network systems,
An information storage server is installed in a network system having a small delay time with the WEB browsing device among the plurality of network systems,
The prefetching proxy server collectively transmits all the information of the prefetch request data extracted from the WEB information to the information storage server, and forwards the prefetched WEB information to the information storage server .
The information storage server stores the prefetch request data and the prefetch web information transmitted from the prefetch proxy server, and stores the request data transmitted from the web browsing device as the prefetch request data. Then, the request data is not transferred to the prefetch proxy server, the prefetched WEB information corresponding to the request data is transmitted to the WEB browsing device, and the request data transmitted from the WEB browsing device is transmitted to the prefetched If the request data is not accumulated, the request data is transferred to the prefetching proxy server. In the WEB information acquisition method according to claim 1,
When the WEB information is an html file, the prefetch proxy server and the information accumulation server extract request data included in the html file, and the prefetch proxy server uses the request data to prefetch the WEB information. WEB information acquisition method characterized by performing. In the WEB information acquisition method according to claim 1,
The information storage server discards the request data when the WEB information corresponding to the request data transmitted from the WEB browsing device is transmitted to the WEB browsing device. A WEB server that transmits WEB information corresponding to the request data;
Transferring the request data to the WEB server, transferring the WEB information transmitted from the WEB server, extracting request data included in the WEB information, and transmitting the request data to the WEB server as pre-read request data; A prefetch proxy server that prefetches the corresponding WEB information;
A WEB browsing device that transmits the request data to the WEB server via the prefetching proxy server and acquires the WEB information via the prefetching proxy server, the WEB server, the prefetching proxy server, and the WEB browsing In the WEB information acquisition apparatus in which the apparatus is installed via a plurality of network systems,
The prefetch proxy server is installed in a network system having a small delay time with the WEB server among the plurality of network systems,
An information storage server is installed in a network system having a small delay time with the WEB browsing device among the plurality of network systems,
The prefetch proxy server has a function of transmitting all the information of the content of the prefetch request data extracted from the WEB information to the information storage server and transferring the prefetched WEB information to the information storage server. Prepared,
The information storage server stores the prefetch request data and the prefetch web information transmitted from the prefetch proxy server, and stores the request data transmitted from the web browsing device as the prefetch request data. Then, the request data is not transferred to the prefetch proxy server, the prefetched WEB information corresponding to the request data is transmitted to the WEB browsing device, and the request data transmitted from the WEB browsing device is transmitted to the prefetched If it is not accumulated as request data, a function for transferring the request data to the prefetch proxy server is provided. In the WEB information acquisition device according to claim 4,
When the WEB information is an html file, the prefetch proxy server and the information accumulation server extract request data included in the html file, and the prefetch proxy server uses the request data to prefetch the WEB information. The web information acquisition device characterized by the above-mentioned. In the WEB information acquisition device according to claim 4,
The information storage server is configured to discard the request data when the WEB information corresponding to the request data transmitted from the WEB browsing device is transmitted to the WEB browsing device. apparatus.

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