JP5602677B2 - WEB information prefetching method, prefetching proxy server device, and information storage server device - Google Patents

Description

  In the present invention, when a WEB browsing apparatus (for example, a personal computer or a portable terminal, hereinafter referred to as “PC”) acquires WEB information (WEB content information) from a WEB server on the network, The connected prefetch proxy server or information storage server prefetches WEB information that is predicted to be requested by the PC from an HTML (HyperText Markup Language) file in the WEB information transmitted from the WEB server based on the request of the PC. The present invention relates to a WEB information prefetching method, a prefetch proxy server device, and an information storage server device that transfer the WEB information to a PC in response to a request from the PC.

  When a PC browses WEB information from a WEB server on a network such as the Internet, the WEB server transmits WEB information to the PC using HTML or the like according to an HTTP (Hypertext Transfer Protocol) communication protocol. For example, when the HTML file index.html provided by the WEB server called byte.tokkyo.co.jp is acquired by HTTP, the WEB information is read at the address http://byte.tokkyo.co.jp/index.html. Can do. When reading WEB information from a WEB server, a user generally specifies and reads an address using a program (hereinafter referred to as “browser”) for browsing the WEB information on a PC. In the PC, when the user inputs an address, the browser transmits a page request to the WEB server. The WEB server receives this page request 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, Patent Document 2, and Patent Document 3 disclose a technique for prefetching WEB information.

  FIG. 6 shows a conventional WEB information prefetching processing sequence. Here, the request data for the PC to browse the WEB information data1 and data2 of the WEB server is set to get1 and get2. The WEB server outputs WEB information data1 and data2 according to the request data get1 and get2. It is assumed that data1 is an HTML file and includes request data get2 of data data2 requested by the PC.

  In FIG. 6, the PC transmits request data get1 to the WEB server. The prefetching proxy server located between the PC and the WEB server extracts and stores get1, and transfers get1 to the WEB server.

  The WEB server transmits WEB information data1 (HTML file) corresponding to get1 to the PC. Since the prefetching proxy server has received get1 corresponding to data1 from the PC, it transfers data1 to the PC. Further, the prefetching proxy server analyzes data1 (HTML file), generates request data get2 that is predicted to be requested next when the PC receives this data1 (prefetching), transmits it to the WEB server, and stores it. .

  The WEB server transmits WEB information data2 corresponding to the prefetch request data get2 to the prefetch proxy server. Since the prefetching proxy server has not received get2 corresponding to the prefetched data2 from the PC, the prefetching proxy server temporarily accumulates data2.

  On the other hand, the PC receives data1, generates get2 from data1, and transmits it to the WEB server. When the prefetch proxy server receives this get2, it compares it with the accumulated request data. Here, since the prefetch proxy server has already accumulated the prefetch request data get2, it is determined that data2 corresponding to get2 has been prefetched, and data2 is accumulated without transmitting get2 to the WEB server. Check if it is. Here, since the prefetching proxy server has already accumulated data2, it transfers data2 corresponding to get2 to the PC.

  Thus, before the request data transmitted by the PC arrives, the WEB server receives the prefetch request data from the prefetch proxy server, correspondingly transmits the WEB information to the prefetch proxy server, and the PC transmits the WEB information. Is obtained from the prefetching proxy server, and the acquisition time of the WEB information is shortened.

FIG. 7 shows a configuration example of a conventional prefetch proxy server device.
In FIG. 7, 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 transferred from the PC to the WEB server, extracts request data (get) from the received signal, and outputs it to the request data comparing unit 23.

  The request data comparison unit 23 inquires whether the request data extracted by the request data receiving unit 22 is stored in the request data storage unit 24, and the request data requesting the same WEB information is stored in the request data storage unit 24. If not (get 1 in FIG. 6), the request data is output to the request data transmission unit 25 and stored in the request data storage unit 24. If the request data extracted by the request data receiving unit 22 is stored in the request data storage unit 24 as prefetch request data (get 2 in FIG. 6), the prefetch request data is stored in the WEB information storage unit 28. Inquire whether or not the WEB information (data2) is stored, and if it has been stored, instruct it to transmit it to the PC at that time.

  The request data transmission unit 25 transfers the request data input from the request data comparison unit 23 to the WEB server via the network interface unit 21.

  The WEB information analysis unit 26 receives the WEB information transmitted by the WEB server according to the request data, extracts the request data for the WEB information (get1 for data1), and outputs it to the WEB information storage unit 28 together with the WEB information. Further, if the WEB information is an HTML file, request data (get 2) predicted to be requested next by the PC that receives the WEB information is generated (pre-read) and output to the pre-read request data comparison unit 27.

  The WEB information storage unit 28 inquires whether request data for the WEB information is stored in the request data storage unit 24. If the request data is stored, the WEB information storage unit 28 outputs the WEB information to the WEB information transmission unit 29. If it has not been accumulated, the process stands by. Further, the WEB information storage unit 28 outputs the WEB information (data 2 for get 2) for the pre-read request data to the WEB information transmission unit 29 according to the instruction of the request data comparison unit 23.

  The WEB information transmission unit 29 transfers the WEB information input from the WEB information storage unit 28 to the PC via the network interface unit 21.

  The prefetch request data comparison unit 27 inquires whether the prefetch request data (get2) generated by the WEB information analysis unit 26 is stored in the request data storage unit 24, and request data requesting the same WEB information is requested. If not stored in the data storage unit 24, the prefetch request data is output to the request data transmission unit 25 and stored in the request data storage unit 24. When the prefetch request data extracted by the WEB information analysis unit 26 is stored in the request data storage unit 24, the corresponding web information has already been prefetched, so that the prefetch request data is output. Absent.

  The request data sending unit 25 transfers the prefetch request data (get 2) input from the prefetch request data comparison unit 27 to the WEB server via the network interface unit 21.

FIG. 8 shows a processing procedure of a conventional prefetching proxy server device.
In FIG. 8, the prefetching proxy server confirms the transmission source and destination of the received signal (S11). If the transmission source of the received signal is a PC and the destination is a WEB server, request data is extracted from the received signal (S12). Next, it is determined whether or not request data that requests the same WEB information as the extracted request data exists in the request data storage unit 24 (S13). If the request data does not exist (get1 in FIG. 6), (S13: No), request data from the PC is transmitted to the WEB server and 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 (get2 in FIG. 6) (S13: Yes), the corresponding data is not transmitted to the WEB server, but the corresponding WEB information (data2 for get2). Is transmitted to the PC (S15).

  When the transmission source of the received signal is the WEB server and the destination is the PC, the request data for the received WEB information (get1 for data1 and get2 for data2 in FIG. 6) is extracted (S16), and the request data for the WEB information is the request data. It is determined whether or not it exists in the storage unit 24 (S17). If the request data exists (S17: Yes), the WEB information is transmitted to the PC (S18). Further, it is determined whether or not the WEB information is an HTML file (S19), and if it is an HTML file (S19: Yes), the request data (data1 in FIG. 6) predicted to be requested next by the PC that receives the WEB information. Get2) is generated (prefetched) (S20). Next, it is determined whether or not the prefetch request data (get2) exists in the request data storage unit 24 (S21). If the prefetch request data does not exist (S21: No), the prefetch request is requested. The data is transmitted to the WEB server and stored in the request data storage unit 24 (S22). On the other hand, if the WEB information is not an HTML file (S19: No), the process is terminated, and if the prefetch request data exists in the request data storage unit 24 (S21: Yes), the corresponding WEB information is already prefetched. Therefore, the process is terminated.

JP 2000-132481 A JP 2001-142769 A JP 2011-039899 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)

  Generally, request data (get) for acquiring WEB information (data) is generated by a browser installed in each device. The request data generated by the browser is added with an HTTP request header corresponding to the environment set in the browser. Therefore, if the browsers mounted on the PC and the prefetching proxy server are different, for example, in FIG. 6, the header of the request data get2 generated by the PC and the prefetching request data get2 that the prefetching proxy server extracts from the WEB information (HTML file). May have different headers. In this case, for example, if the AcceptLanguage of the HTTP header is different and the request data is in a different language, the WEB server responds with different WEB information to each request data. Then, if the WEB information data2 prefetched by the prefetching proxy server is returned to the PC as it is, garbled characters may be generated on the browser of the PC.

  Further, when the prefetching proxy server makes a prefetch request to the WEB server, conventionally, the order of CSS (cascading style sheet), JS (javascript), and IMG (image) has not been considered. Therefore, when the IMG file arrives before the CSS file arrives at the prefetching proxy server and is transferred to the PC in that order, the layout may be corrupted on the PC browser.

  The present invention provides a WEB information prefetching method, a prefetching proxy server device, and an information storage server device capable of eliminating garbled characters and layout disruption of WEB information displayed on a PC by data prefetching by a prefetching proxy server. With the goal.

  A first invention is a WEB information prefetching method using a prefetch proxy server connected between a WEB server and a WEB browsing device via a network system, wherein the prefetch proxy server is transmitted from the WEB browsing device. Request data is transferred to the WEB server, WEB information corresponding to the first request data transmitted from the WEB server is transferred to the WEB browsing apparatus, and second request data is generated from the WEB information to generate the WEB server. , Receiving prefetched WEB information corresponding to the second request data transmitted from the WEB server, and receiving the WEB information corresponding to the first request data, and receiving the third information transmitted from the WEB browsing apparatus. When the request data is received and the second request data requesting the same WEB information matches the header information of the third request data Transfers the WEB information read ahead WEB browsing device, both transmits the third request data to the WEB server deletes the WEB information of the second request data and prefetching when the mismatch.

In WEB information prefetching method of the first aspect of the invention, the information storage server reads the WEB information lookahead CSS (Cascading Style Sheets) file, JS (Javascript) file, in the order of IMG (image) file WEB Transfer to the browsing device.

  A second invention is a WEB information prefetching method using a prefetching proxy server and an information storage server connected between a WEB server and a WEB browsing device via a network system, wherein the information storage server transmits from the WEB browsing device. The received first request data is transferred to the WEB server via the prefetch proxy server, and the WEB information corresponding to the first request data transmitted from the WEB server is received via the prefetch proxy server to the WEB browsing device. From the WEB browsing device that has transferred and stored the web information prefetched from the web server using the second request data generated from the web information by the prefetching proxy server, and obtained the web information corresponding to the first request data The received third request data is received, the second request data requesting the same WEB information, and the third request data When the header information of the requested data matches, the pre-read WEB information is transferred to the WEB browsing device, and when the two do not match, the second request data and the pre-read WEB information are deleted and the third request data is It transmits to a WEB server via a prefetch proxy server.

In WEB information prefetching method of the second invention, the information storage server reads the WEB information lookahead CSS (Cascading Style Sheets) file, JS (Javascript) file, in the order of IMG (image) file WEB Transfer to the browsing device.

  A third invention is a prefetch proxy server device that is connected between a WEB server and a WEB browsing device via a network system and transfers WEB information prefetched from the WEB server to the WEB browsing device, and is transmitted from the WEB browsing device. The first means for transferring the first request data to the WEB server, the WEB information corresponding to the first request data transmitted from the WEB server is transferred to the WEB browsing device, and the second information is further transmitted from the WEB information. Second means for generating request data and transmitting it to the WEB server; prefetched WEB information corresponding to the second request data transmitted from the WEB server; and WEB information corresponding to the first request data Receiving the third request data transmitted from the WEB browsing apparatus that acquired the request, and requesting the same WEB information; When the header information of the third request data matches, the pre-read WEB information is transferred to the WEB browsing device, and when the two do not match, the second request data and the pre-read WEB information are deleted and the third And a third means for transmitting the request data to the WEB server.

In prefetching proxy server apparatus of the third invention, the third means reads the WEB information lookahead CSS (Cascading Style Sheets) file, JS (Javascript) file, in the order of IMG (image) file It is the structure which transfers to a WEB browsing apparatus.

  A fourth invention is an information storage server device connected between a WEB server and a WEB browsing device via a network system, wherein the prefetching proxy server receives the WEB information prefetched from the WEB server and further transfers it to the WEB browsing device. The first means for transferring the first request data transmitted from the WEB browsing device to the WEB server via the prefetch proxy server, and the WEB information corresponding to the first request data transmitted from the WEB server are prefetched. A second means for receiving the WEB information received from the proxy server, transferring it to the WEB browsing device, and further storing the WEB information pre-read from the WEB server using the second request data generated from the WEB information by the pre-read proxy server; Receives the third request data transmitted from the WEB browsing apparatus that acquired the WEB information corresponding to the first request data. When the second request data requesting the same WEB information and the header information of the third request data match, the pre-read WEB information is transferred to the WEB browsing device, and when both do not match, the second request data And third means for deleting the request data and the prefetched WEB information and transmitting the third request data to the WEB server via the prefetch proxy server.

In prefetching proxy server apparatus of the fourth invention, the third means reads the WEB information lookahead CSS (Cascading Style Sheets) file, JS (Javascript) file, in the order of IMG (image) file It is the structure which transfers to a WEB browsing apparatus.

  The present invention can eliminate the difference in request data caused by the difference between the browser of the WEB browsing device (PC) and the prefetching proxy server, and can avoid garbled characters in the prefetched WEB information.

  In addition, by reading the pre-read WEB information in the order of CSS, JS, and IMG and transferring them to the WEB browsing device (PC), it is possible to avoid the layout of the WEB information from being corrupted.

It is a figure which shows the structural example of the prefetch proxy server apparatus of this invention. It is a figure which shows the processing sequence of the WEB information prefetch of this invention. It is a flowchart which shows the process sequence of the prefetch proxy server apparatus of this invention. It is a figure which shows the system structural example using an information storage server. It is a figure which shows the processing sequence of WEB information prefetch using the information storage server of this invention. It is a figure which shows the processing sequence of the conventional web information prefetch. It is a figure which shows the structural example of the conventional prefetching proxy server apparatus. It is a flowchart which shows the process sequence of the conventional prefetch proxy server apparatus.

FIG. 1 shows a configuration example of a prefetching proxy server device according to the present invention.
In FIG. 1, a network interface unit 21, a request data receiving unit 22, a request data storage unit 24, a request data sending unit 25, a WEB information analyzing unit 26, a prefetch request data comparing unit 27, and a WEB information sending unit 29 of a prefetching proxy server It has the same function as the conventional configuration, and is a configuration in which the functions of the request data comparison unit 11 and the WEB information storage unit 12 are changed.

  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 transferred from the PC to the WEB server, extracts request data from the received signal, and outputs the request data to the request data comparing unit 11.

  The request data comparison unit 11 inquires whether the request data extracted by the request data receiving unit 22 is stored in the request data storage unit 24, and request data that requests the same WEB information is stored in the request data storage unit 24. If not (get 1 in FIG. 6), the request data is output to the request data transmission unit 25 and stored in the request data storage unit 24. If the request data extracted by the request data receiving unit 22 is stored in the request data storage unit 24 as prefetch request data (get2 in FIG. 6), the request data from the PC and the prefetch request data If the HTTP request headers are collated and the two HTTP request headers match, an inquiry is made as to whether or not the WEB information (data2) for the prefetched request data is stored in the WEB information storage unit 12; If it is not accumulated at the time, it is instructed to transmit to the PC when it is accumulated. On the other hand, if the HTTP request headers do not match, the pre-read request data is deleted and the request data from the PC is output to the request data sending unit 25 and stored in the request data storage unit 24.

  The request data transmission unit 25 transfers the request data input from the request data comparison unit 23 to the WEB server via the network interface unit 21.

  The WEB information analysis unit 26 receives the WEB information transmitted by the WEB server according to the request data, extracts the request data for the WEB information (get1 for data1), outputs the request data to the WEB information storage unit 12 together with the WEB information. If the WEB information is an HTML file, request data (get2) predicted to be requested next by the PC that receives the WEB information is generated (prefetched) and output to the prefetch request data comparison unit 27.

  The WEB information storage unit 12 inquires whether the request data for the WEB information is stored in the request data storage unit 24. If the request data is stored, the WEB information storage unit 12 outputs the WEB information to the WEB information transmission unit 29. If it has not been accumulated, the process stands by. Further, the WEB information storage unit 12 outputs WEB information (data 2 for get 2) for the pre-read request data to the WEB information transmission unit 29 in accordance with an instruction from the request data comparison unit 23.

  At this time, the WEB information storage unit 12 outputs the WEB information to the WEB information transmission unit 29 in the order of the link to the CSS file, the link to the JS file, and the link to the IMG file. As a result, on the browser of the PC, the WEB screens are configured and displayed in this order, so that the display of the WEB screen is prevented from being corrupted.

  The WEB information sending unit 29 transfers the WEB information input from the WEB information storage unit 12 to the PC via the network interface unit 21.

  The prefetch request data comparison unit 27 inquires whether prefetch request data (get2) is stored in the request data storage unit 24, and request data requesting the same WEB information is not stored in the request data storage unit 24. In this case, the prefetch request data is output to the request data transmission unit 25 and stored in the request data storage unit 24. Further, when the pre-read request data is stored in the request data storage unit 24, since the corresponding WEB information has already been pre-read, the pre-read request data is not output.

  The request data transmission unit 25 transmits the prefetch request data (get 2) input from the prefetch request data comparison unit 27 to the WEB server via the network interface unit 21.

  Note that the prefetch proxy server can determine which request data is to be processed by, for example, setting a port number in advance. That is, the request data and WEB information including the set port number may be extracted by the network interface unit 21 and output to the request data receiving unit 22 or the WEB information analyzing unit 26.

  FIG. 2 shows a processing sequence of WEB information prefetching according to the present invention. Here, the request data for the PC to browse the WEB information data1 and data2 of the WEB server is set to get1 and get2. The WEB server outputs WEB information data1 and data2 according to the request data get1 and get2. It is assumed that data1 is an HTML file and includes get2 'corresponding to request data get2 of data data2 requested by the PC.

  In FIG. 2, the PC transmits request data get1 to the WEB server. The prefetching proxy server located between the PC and the WEB server extracts and stores get1, and transfers get1 to the WEB server.

  The WEB server transmits WEB information data1 (HTML file) corresponding to get1 to the PC. Since the prefetching proxy server has received get1 corresponding to data1 from the PC, it transfers data1 to the PC. The prefetch proxy server analyzes data1 (HTML file), generates (prefetchs) request data get2 ′ predicted to be requested next when the PC receives this data1, transmits it to the WEB server, and stores it. To do. At this time, the HTTP request header of the prefetch request data get2 'is also accumulated.

  The WEB server transmits WEB information data2 'corresponding to the prefetch request data get2' to the prefetch proxy server. Since the prefetching proxy server has not received get2 'corresponding to the prefetched data2' from the PC, the prefetching proxy server temporarily accumulates data2 '.

  On the other hand, the PC receives data1, generates get2 from data1, and transmits it to the WEB server. When the prefetch proxy server receives this get2, it compares it with the accumulated request data. Here, if the request data get2 from the PC and the request data get2 ′ of the prefetch request the same WEB information, and the HTTP request headers of both match, the data2 ′ corresponding to get2 ′ is It is determined that prefetching has already been performed, and it is confirmed whether or not data2 ′ is accumulated without transferring get2 ′ to the WEB server. If it is accumulated, data2 ′ is transmitted to the PC (in the figure). Dashed line). On the other hand, if they do not match, get2 'and data2' are discarded, and get2 from the PC is transferred to the WEB server and stored. The WEB server transmits WEB information data2 corresponding to get2 to the PC. Since the prefetching proxy server receives get2 corresponding to data2 from the PC, it transfers data2 to the PC (solid line in the figure).

  In this way, the WEB server receives the prefetch request data from the prefetch proxy server before the request data transmitted by the PC arrives, and correspondingly transmits the WEB information to the prefetch proxy server. If the HTTP request header of the request data get2 transmitted from the PC matches the prefetch request data get2 ′, the WEB information data2 ′ for the prefetch request data get2 ′ is transmitted to the PC as it is. The acquisition time of the WEB information is shortened. On the other hand, if the HTTP request header does not match, the pre-read WEB information can be discarded, and the WEB information data2 for the request data get2 from the PC can be newly read from the WEB server.

FIG. 3 shows a processing procedure of the prefetching proxy server of the present invention.
In FIG. 3, the prefetch proxy server confirms the transmission source and destination of the received signal (S11). If the transmission source of the received signal is a PC and the destination is a WEB server, request data is extracted from the received signal (S12). Next, it is determined whether or not request data requesting the same WEB information as 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 from the PC is transmitted to the WEB server and 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 HTTP request header of the request data from the PC (get 2 in FIG. 2) and the pre-read request data (get 2 ′ in FIG. 2). (S24, S25), and if the two match (S25: Yes), the corresponding data (data2 ′ for get2) is transmitted to the PC without transmitting the request data to the WEB server ( S15). At this time, WEB information is transmitted in the order of CSS, JS, and IMG.

  On the other hand, when the HTTP request headers of the request data (get2) from the PC and the prefetch request data (get2 ′) do not match (S25: No), the prefetch request data (get2 ′) and the WEB information (data2 ′) corresponding thereto ) And the request data (get2) from the PC is transmitted to the WEB server and stored in the request data storage unit 24 (S14).

  When the source of the received signal is the WEB server and the destination is the PC, the request data for the received WEB information (get1 for data1 and get2 for data2 in FIG. 2) is extracted (S16), and the request data for the WEB information is the request data. It is determined whether or not it exists in the storage unit 24 (S17). If the request data exists (S17: Yes), the WEB information is transmitted to the PC (S18). Further, it is determined whether or not the WEB information is an HTML file (S19), and if it is an HTML file (S19: Yes), the request data (data1 in FIG. 6) predicted to be requested next by the PC that receives the WEB information. Get2) is generated (prefetched) (S20), and an HTTP request header is extracted from the prefetched request data and stored (S23). This HTTP request header is used for collation in the process of S24. Next, it is determined whether or not the prefetch request data (get2) exists in the request data storage unit 24 (S21). If the prefetch request data does not exist (S21: No), the prefetch request is requested. The data is transmitted to the WEB server and stored in the request data storage unit 24 (S22). On the other hand, if the WEB information is not an HTML file (S19: No), the process is terminated, and if the prefetch request data exists in the request data storage unit 24 (S21: Yes), the corresponding WEB information is already prefetched. Therefore, the process is terminated.

  The present invention also relates to information storage in the network system configuration of Patent Document 3 having an information storage server connected between the prefetch proxy server and the PC when the network delay time between the PC and the prefetch proxy server is large. It can also be applied to servers.

FIG. 4 shows a system configuration example using an information storage server.
In FIG. 4, the WEB server 31 is connected to the Internet 32. A PC 33, which is an example of a WEB browsing apparatus, is connected to the Internet 32 via a LAN 34 and a high delay network 35. A gateway GW is arranged at a connection point of each network. Here, the high-delay network 35 is a so-called WAN (Wide Area Network) that interconnects remote computers using, for example, a broadband wireless system or a satellite line. A longer delay time than that of the LAN 34 occurs.

  The prefetch proxy server 20 is connected to a predetermined position on the WEB server 31 side from the high delay network 35, for example, the Internet 32 or between the Internet 32 and the high delay network 35. On the other hand, the information storage server 30 is connected to a LAN 34 to which the PC 33 is connected. That is, the time for the PC 33 to access each server becomes shorter in the order of the WEB server 31, the prefetching proxy server 20, and the information storage server 30.

  FIG. 5 shows a processing sequence of WEB information prefetching using the information storage server of the present invention. Here, let the request data for the PC 33 to browse the WEB information data1 and data2 of the WEB server 31 be get1 and get2. The WEB server 31 outputs WEB information data1 and data2 according to the request data get1 and get2. It is assumed that data1 is an HTML file and includes get2 'corresponding to the request data get2 of the data data2 requested by the PC 33.

  In FIG. 5, the PC 33 transmits request data get 1 to the WEB server 31. The information storage server 30 and the prefetching proxy server 20 extract and store get1 respectively, and transfer get1 toward the WEB server 31.

  The WEB server 31 transmits data1 (HTML file) corresponding to get1 to the PC 33. Since the prefetch proxy server 20 and the information storage server 30 store get1 corresponding to data1, the data1 is transferred to the PC 33 as it is. Further, the prefetch proxy server 20 generates (prefetchs) get2 ′ which is request data predicted to be requested next when the PC 33 receives this data1. Further, the prefetch proxy server 20 notifies the information storage server 30 of data including the prefetch request data get 2 ′ (prefetch notification) and transmits it to the WEB server 31. The information accumulation server 30 accumulates the prefetch request data get 2 ′ notified from the prefetch proxy server 20.

  The WEB server 31 transmits data2 'corresponding to the prefetch request data get2' to the prefetch proxy server 20. The prefetch proxy server 20 transfers the prefetched data 2 ′ to the information storage server 30. The information accumulation server 30 temporarily accumulates the prefetched data 2 'with respect to the prefetch request data get2'.

  On the other hand, the PC 33 receives data 1, generates get 2 from data 1, and transmits it to the WEB server 31. When the information storage server 30 receives this get2, it compares it with the stored request data. Here, the information storage server 30 stores prefetched request data get2 ′ for requesting the same WEB information as the request data get2 from the PC 33, and the HTTP request headers of both request data are collated to match. Determines that data2 ′ corresponding to get2 ′ has already been prefetched, and checks whether data2 ′ is accumulated without transferring get2 ′ to the WEB server. Data2 ′ is transmitted to the PC 33 (broken line in the figure). On the other hand, if they do not match, get 2 ′ and data 2 ′ are discarded, and get 2 from the PC is transferred to the WEB server 31 via the prefetch proxy server 20 and stored. The WEB server 31 transmits WEB information data2 corresponding to get2 to the PC 33. Since the prefetch proxy server 20 and the information storage server 30 have received get2 corresponding to data2 from the PC 33, they transfer data2 to the PC 33 (solid line in the figure).

  At this time, the information storage server 30 transfers data2 'or data2 to the PC 33 in the order of the link to the CSS file, the link to the JS file, and the link to the IMG file. As a result, on the browser of the PC, the WEB screens are configured and displayed in this order, so that the display of the WEB screen is prevented from being corrupted.

DESCRIPTION OF SYMBOLS 11 Request data comparison part 12 WEB information storage part 20 Prefetch proxy server 21 Network interface part 22 Request data reception part 23 Request data comparison part 24 Request data storage part 25 Request data transmission part 26 WEB information analysis part 27 Prefetch request request data comparison part 28 WEB information storage unit 29 WEB information transmission unit 30 Information storage server 31 WEB server 32 Internet 33 PC
34 LAN
35 High latency network

Claims (8)

In a WEB information prefetching method using a prefetch proxy server connected between a WEB server and a WEB browsing device via a network system,
The prefetch proxy server is
Transferring the first request data transmitted from the WEB browsing device to the WEB server;
Transferring WEB information corresponding to the first request data transmitted from the WEB server to the WEB browsing device, generating second request data from the WEB information, and transmitting the second request data to the WEB server;
Receiving the prefetched WEB information corresponding to the second request data transmitted from the WEB server, and acquiring the WEB information corresponding to the first request data; When the request data is received and the header information of the third request data matches the second request data requesting the same WEB information, the prefetched WEB information is transferred to the WEB browsing device, The WEB information prefetching method is characterized in that when the header information does not match, the second request data and the prefetched WEB information are deleted and the third request data is transmitted to the WEB server. In the WEB information prefetching method of Claim 1,
The read-ahead proxy server, characterized in that the transfer of the WEB information of the read-ahead CSS (Cascading Style Sheets) file, JS (javascript) file, is read in the order of the IMG (image) files to the WEB browsing device WEB information prefetching method. In a WEB information prefetching method using a prefetch proxy server and an information storage server connected between a WEB server and a WEB browsing apparatus via a network system,
The information storage server includes:
Transferring the first request data transmitted from the WEB browsing device to the WEB server via the prefetch proxy server;
WEB information corresponding to the first request data transmitted from the WEB server is received via the prefetch proxy server, transferred to the WEB browsing device, and further generated by the prefetch proxy server from the WEB information. WEB information prefetched from the WEB server using the request data of 2 is accumulated,
The third request data transmitted from the WEB browsing apparatus that has acquired the WEB information corresponding to the first request data is received, and the second request data and the third request for requesting the same WEB information are received. When the header information of the data matches, the pre-read WEB information is transferred to the WEB browsing device, and when the two do not match, the second request data and the pre-read WEB information are deleted and the third Request data is transmitted to the WEB server via the prefetching proxy server. WEB information prefetching method characterized by the above-mentioned. In the WEB information prefetching method of Claim 3,
Wherein the information storage server, wherein the transfer of WEB information of the prefetch CSS (Cascading Style Sheets) file, JS (Javascript) file, reads the order of IMG (image) file to the WEB browsing device WEB information prefetching method. In a prefetching proxy server device connected between a WEB server and a WEB browsing device via a network system and transferring WEB information prefetched from the WEB server to the WEB browsing device,
First means for transferring first request data transmitted from the WEB browsing device to the WEB server;
WEB information corresponding to the first request data transmitted from the WEB server is transferred to the WEB browsing device, and second request data is generated from the WEB information and transmitted to the WEB server. Means,
Receiving the prefetched WEB information corresponding to the second request data transmitted from the WEB server, and acquiring the WEB information corresponding to the first request data; When the request data is received and the header information of the third request data matches the second request data requesting the same WEB information, the prefetched WEB information is transferred to the WEB browsing device, And a third means for deleting the second request data and the prefetched WEB information and transmitting the third request data to the WEB server when they do not match. apparatus. In the prefetch proxy server device according to claim 5,
Said third means, the WEB information of the prefetch CSS (Cascading Style Sheets) file, JS (Javascript) file, in a configuration that transfers read in the order of IMG (image) file to the WEB browsing device A prefetch proxy server device characterized by being. In an information storage server device connected between a WEB server and a WEB browsing device via a network system, the prefetching proxy server receives the WEB information prefetched from the WEB server, and further transfers it to the WEB browsing device.
First means for transferring first request data transmitted from the WEB browsing device to the WEB server via the prefetch proxy server;
WEB information corresponding to the first request data transmitted from the WEB server is received via the prefetch proxy server, transferred to the WEB browsing device, and further generated by the prefetch proxy server from the WEB information. Second means for storing WEB information prefetched from the WEB server using the request data of 2;
The third request data transmitted from the WEB browsing apparatus that has acquired the WEB information corresponding to the first request data is received, and the second request data and the third request for requesting the same WEB information are received. When the header information of the data matches, the pre-read WEB information is transferred to the WEB browsing device, and when the two do not match, the second request data and the pre-read WEB information are deleted and the third And a third means for transmitting request data to the WEB server via the prefetching proxy server. In the information storage server device according to claim 7,
Said third means, the WEB information of the prefetch CSS (Cascading Style Sheets) file, JS (Javascript) file, in a configuration that transfers read in the order of IMG (image) file to the WEB browsing device An information storage server device characterized by that.

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