KR20090103552A - System for providing web page using contents cacheing and method thereof - Google Patents

Abstract

PURPOSE: A web page using the contents caching, a web contents providing system and a method thereof are provided to enable an individual user to download web pages of all websites quickly regardless of a specific web service. CONSTITUTION: A web contents providing system comprises a web proxy server(20). The web proxy server provides a web page to a client terminal(10) by using the contents caching, an HTTP request message is transmitted from the client terminal. The web proxy server includes a caching engine(22) and a contents storing unit(24). The web proxy server loads pre-stored contents by determining whether to store contents corresponding to a response message to the HTTP request message based on the received HTTP request message, downloads contents which are not stored from a corresponding web server, and then transmits a web page including the loaded/downloaded contents to the client terminal.

Description

System and method for providing web pages and web contents using content caching {SYSTEM FOR PROVIDING WEB PAGE USING CONTENTS CACHEING AND METHOD THEREOF}

The present invention relates to a system and method for providing a web page using content caching, and more particularly, content caching to enable individual users to quickly download web pages for all web sites used regardless of a specific web service. The present invention relates to a technology for providing web pages for all web servers.

As the Internet base expands and computer penetration increases rapidly, Internet users are increasing day by day. Internet users use Web services through various paths on the network. That is, in order for an internet user to access a specific site and use web content provided by the site, packet data corresponding to the web content is transmitted to the internet user terminal through various routers. When multiple Internet users access the same site and use the same web content, the same packet data is transmitted over the network. In a network, the more packet data transmitted, the higher the traffic congestion. To solve this problem, ISPs are increasing bandwidth considerably, which results in some improvement in data transfer rate. However, as the amount of content increases and the content capacity increases, the transmission of content through various paths (routers) as described above is a major cause of the data transmission speed, which increases the service dissatisfaction with the Internet speed. Being one of.

In order to solve the above problems, a Contents Delivery Network (CDN) has been proposed.

CDN puts copies of web service contents using CDN service in a number of Internet Data Centers (IDCs) and uses Global Load Balancer (GLB) to allow Internet users to receive content from the nearest IDC on the network path. The conventional CDN service is characterized by having a CP (Content Provider) for customers, managing web service content stored in IDC by the CDN service provider, and providing an infrastructure for serving a copy of the content for each IDC. .

As described above, since the conventional CDN service is configured and managed for each CP service, it cannot be applied to all web requests of Internet users. Therefore, if an Internet user receives web content from a service subscribed to a CDN service, the web content can be downloaded quickly. However, if an Internet user receives web content from a service not subscribed to a CDN service, the web content is downloaded. The problem is that it still takes a long time to receive.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and web pages for all web servers using content caching to quickly download web pages for all web sites to be used regardless of a specific web service for individual users. The purpose is to provide.

In order to achieve the above object, a web page providing system using content caching according to the present invention includes a web proxy server that provides a web page to the client terminal using content caching when an HTTP request message is transmitted from the client terminal. The web proxy server determines whether to store contents corresponding to the response message corresponding to the HTTP request message based on the HTTP request message received from the client terminal, and loads the previously stored contents. And a caching engine configured to download a web page including the loaded contents and the downloaded contents from the server to the client terminal, and a content storage unit to store predetermined contents under the control of the caching engine. do.

Preferably, in the present invention, the web proxy server further includes a content download unit which downloads the contents from a web server providing the contents when the contents are not stored in advance under the control of the caching engine, and the caching engine includes: The downloaded contents are stored in the content storage unit.

Preferably, in the present invention, the web proxy server is an application module for processing the downloaded content in the form for providing an additional service under the control of the caching engine, the application module for storing the processed content in the content storage unit; It is characterized by further comprising.

Preferably, the present invention is characterized in that it further comprises a policy control unit for determining whether to allow the caching of the HTTP request message.

Preferably, the content in the present invention is characterized in that it comprises a file in the form of a text, and all objects transmitted over an HTTP protocol such as an image file or a flash file linked by the file in the text form.

Preferably, in the present invention, the client terminal is characterized in that it comprises an agent is routed so that all HTTP request messages generated by the web browser is transmitted to the web proxy server.

The web page providing method used for content caching according to the present invention comprises the steps of: (a) if an HTTP request message is received from a client terminal, determining whether the HTTP request message is a content caching target, (b) the HTTP request message is content caching Determining that the content is pre-stored in the content storage unit, (c) if the content is pre-stored in the content storage unit, loading the content and transmitting the content to the client terminal; and d) if the content is not previously stored in the content storage unit, downloading the content from the corresponding web server and storing the content in the content storage unit.

Preferably, the step (a) of the present invention is characterized by analyzing the HTTP request message to determine whether the HTTP request message is a caching permission target.

Preferably, the step (a) of the present invention is characterized by determining whether the HTTP request message is a caching permission target by determining a policy based on the HTTP request message.

Preferably, the step (d) of the present invention is characterized in that it further comprises the step of processing the downloaded content in a form capable of providing an application service, and storing the content in the content storage unit.

According to the present invention, by providing web pages to all web servers by using content caching, it is possible to download web pages quickly for all web sites used by individual users regardless of a particular web service when using the Internet. have.

1 is a schematic block diagram of a web page providing system used for content caching according to an embodiment of the present invention.

FIG. 2 is a detailed block diagram of the web proxy server shown in FIG.

3 is a flowchart illustrating a web page providing method used for content caching according to an embodiment of the present invention.

Hereinafter, with reference to the accompanying drawings will be described an embodiment of the present invention.

1 is a block diagram of a web page and web content providing system using content caching according to an embodiment of the present invention.

The client A terminal 10 shown in FIG. 1 is connected to a web proxy server 20 located at IDC A, and the client B terminal 50 is connected to a web proxy server 60 located at IDC B, and the web proxy server 20 connects to all website servers 40, 42, 44 via the Internet 30.

The client A terminal 10 is equipped with an agent whose path is set to transmit an HTTP request message to the web proxy server 20 when the web browser is driven to receive a response to the HTTP request message from the web proxy server 20. By the agent, all HTTP request messages generated in the client A terminal 10 are transmitted to the web proxy server 20, and the client A terminal 10 responds to the HTTP request message from the web proxy server 20. Receive the.

In general web browsing, the web proxy server 20 downloads a text format HTML file corresponding to the response of the HTTP request message input from the client A terminal 10 to the client A terminal 10 after downloading. Send a response to the web server instead. Thereafter, the client A terminal 10 requests for the detailed file (for example, an image file or a flash file) included in the HTML file are sequentially downloaded from the corresponding web server and responded. In particular, in the present invention, the web proxy server 20 stores the text file and the detailed files downloaded from the web server, and then the same HTTP request message from the corresponding terminal (for example, client A terminal 10) or another client terminal. If is transmitted to the client A terminal 10 using the pre-stored text format file and the detailed file to service the client A terminal 10 to load the page without accessing the web server. For reference, the text-formatted HTML file such as "index.pnp" or "index.html" includes the URL of the image file or flash file to be layout and linked with the text. The client A terminal 10 downloads the image file or the flash file from the corresponding web server through the URL linked from the HTML file. For example, the URL of the HTML file in the text format may be the same as "http://www.aranetworks.com/index.php". Hereinafter, in the present invention, a text file, an image file, a flash file, and the like will be described using the term "content".

Meanwhile, the web proxy server 20 downloads the content, stores the content, loads the content, and transmits the content directly to the client terminal. Thus, the process of receiving the downloaded content from the server can be omitted. A web page can be provided quickly to the side.

The web proxy server 60 also performs the same operation as the web proxy server 20 described above with respect to the client B terminal 50.

FIG. 2 is a detailed configuration diagram of the web proxy server 20 shown in FIG. 1.

The web proxy server 20 includes a request service unit 21, a caching engine 22, a policy control unit 23, a content storage unit 24, an application module 25, and a content download unit 26.

The request service unit 21 transmits the HTTP request message transmitted from the client A terminal 10 to the caching engine 22 and generates an HTML file corresponding to the response to the HTTP request message transmitted from the caching engine 22. It performs the function of transmitting to the client A terminal (10).

The caching engine 22 performs a policy determination on the HTTP request message transmitted from the request service unit 21, and if the caching of the content corresponding to the HTTP request message is allowed as a result of the policy determination, the caching engine 22 It is determined whether the corresponding content is stored in the content storage unit 24. The caching engine 22 loads the pre-stored content and transmits the pre-stored content to the request service unit 21 if the content is previously stored in the content storage unit 24, and if the content is the content storage unit 24. If the previously stored state is not confirmed, the content download unit 22 performs a function of requesting the download of the corresponding content to the corresponding web server.

The policy controller 23 determines a caching permission policy for the HTTP request message. In the present invention, the policy controller 23 may determine a caching grant policy for an HTTP request message by performing URL redirection, security, and a web server that permit caching, and the like. This function performs content caching according to the determined policy by determining caching policy according to URL.

The content storage unit 24 performs a function of storing content under the control of the caching engine 22, and the application module 25 processes the content received from the content download unit 26 under the control of the caching engine 22. To transmit to the caching engine 22. In the present invention, the application module 25, for example, when providing a translation service as an additional service can translate the text into a corresponding language and store it, and when providing an advertisement deletion service, the corresponding advertisement part or image file in the HTML file, etc. After removal, the processed content is transmitted to the caching engine 22 as described above. The caching engine 22 stores the processed web page transmitted from the application module 25 in the content storage unit 24.

The web proxy server 60 has a similar configuration and operation to that of the web proxy server 20, and thus a detailed description thereof will be omitted.

Next, a web page and a web content providing method using content caching according to an embodiment of the present invention will be described in detail with reference to the flowchart shown in FIG. 3.

When the user of the client A terminal 10 selects a link or inputs a URL in the web browser, the client A terminal 10 transmits an HTTP request message corresponding to the link selection or URL input to the web proxy server 20. .

When the HTTP request message is received to the caching engine 22 through the request service unit 21 of the web proxy server 20 (S2), the caching engine 22 receives the HTTP request message transmitted from the request service unit 21. The analysis determines whether the corresponding HTTP request message can be cached (S4). In the present invention, the web proxy server 20 is based on the well-known standard specification of HTTP / 1.1 (see http://www.w3.org/Protocols/rfc2616/rfc2616.html#sec13) for specific headers of HTTP requests and responses. It is determined whether the HTTP request message is a caching target for the content based on the existence or values of caches (such as cache-control) (S4).

If it is determined in step S4 that content caching is not possible by the HTTP request message (No in S4), the caching engine 22 transmits the HTTP request message to the content download unit 26 to transmit the content from the corresponding web server. Download sequentially (S5).

On the other hand, if it is determined in step S4 that content caching is possible by the HTTP request message (Yes in S4), the caching engine 22 determines the policy for the HTTP request message from the policy controller 23 (S6). .

If it is determined in step S6 that the content is to be cached (Yes in S8), the caching engine 22 determines whether the content corresponding to the web page corresponding to the response of the HTTP request message is stored in the content storage unit 24. (S10). In the S6 step, if the standard specification of HTTP / 1.1 announced indicates that the header of HTTP request and response is cacheable, for example, the value of the cache-control header of request and response does not include no-cache or no-store. If not, the HTTP request message is determined to be content caching target.

If the content corresponding to the HTTP request message is stored in the content storage unit 24 (Yes in step S10), the content storage unit 24 loads the corresponding content and transmits it to the client A terminal 10 (S11).

Subsequently, the caching engine 22 proceeds to step S20 to determine whether all content transmission is completed to the client A terminal 10.

If the corresponding content is not stored in the content storage unit 24 (No in S10), the caching engine 22 downloads the content from the corresponding web server (S12).

The caching engine 22 determines whether the additional service corresponding to the HTTP request message is an additional service that requires processing based on the HTTP request message, and if it is determined that the additional service needs processing, in response to the HTTP request message. After processing the downloaded content, the processed content is stored in the content storage unit 24. For example, an additional service that requires processing may include a translation service or an advertisement deleting service. The caching engine 22 stores the URL address as a key when storing the processed or raw content in the content storage unit 24 (S18). For example, the caching engine 22 stores a file in a text format using a URL corresponding to "http://www.aranetworks.com/index.php" as a key, and the file image file in the text format is "http: //www.aranetworks.com/images/main/logo.gif "," http://www.aranetworks.com/images/main/main_img_01.jpg "as a key and stored in the content storage unit 24 do.

In addition, the caching engine 22 transmits the downloaded content to the client A terminal 10 according to the request of the client A terminal 10 so that the web page loading or the web content download is performed on the client A terminal 10 side. (S19).

In the step S10 to step S18 carried out in the present invention, when the cached content is downloaded once from the web server, the downloaded content is stored and when the HTTP request message for requesting the corresponding content from a plurality of client terminals is transmitted. It is possible to significantly reduce the time required to download the contents from the web server for loading the web page or downloading the web contents by loading the previously stored contents and transmitting them to the corresponding client terminal without downloading the contents from the web server.

This makes it possible to quickly provide a web page to the client terminal side.

The content providing method as described above may be applied to all web services without being limited to a specific web service, and is not limited to a specific client terminal so that all client terminals can receive a web page loaded with pre-stored content. There is an advantage that the web page can be provided quickly to the terminal side.

In addition, the present invention is applicable to all content requested based on HTTP.

Claims (10)

A web proxy server for providing a web page to the client terminal by using content caching when an HTTP (HyperText Transport Protocol) request message is transmitted from the client terminal, The web proxy server Based on the HTTP request message received from the client terminal, it is determined whether to store the contents corresponding to the response message corresponding to the HTTP request message, and the previously stored contents are loaded and the unsaved contents are downloaded from the corresponding web server. A caching engine configured to transmit a web page including the downloaded contents and the downloaded contents to the client terminal; And And a content storage unit for storing predetermined content under the control of the caching engine. Web page and web content providing system using content caching. The method of claim 1, wherein the web proxy server And a content download unit which downloads the contents from the web server providing the contents when the contents are not stored in advance under the control of the caching engine. The caching engine stores the downloaded contents in the content storage unit. Web page and web content providing system using content caching. 3. The web proxy server of claim 2, wherein the web proxy server is And after processing the downloaded contents into a form for providing an additional service under the control of the caching engine, further comprising an application module for storing the processed contents in the content storage unit. Web page and web content providing system using content caching. The method of claim 1, And a policy controller for determining whether to allow caching of the HTTP request message. Web page and web content providing system using content caching. The method according to any one of claims 1 to 3, The content is It includes all web content using HTTP Web page and web content providing system using content caching. The method of claim 1, wherein the client terminal And an agent configured to route all HTTP request messages generated from the web browser to the web proxy server of the nearest network path. Web page and web content providing system using content caching. (a) if an HTTP request message is received from a client terminal, determining whether the HTTP request message is a content caching target; (b) determining that the content is pre-stored in the content storage unit when the HTTP request message is determined to be content caching target; (c) if the content is pre-stored in the content storage unit, loading the content and transmitting the content to the client terminal; And (d) if the content is not previously stored in the content storage unit, downloading the content from a corresponding web server and storing the content in the content storage unit.  Web page and web content providing method using content caching. 8. The method of claim 7, wherein Transmitting the generated HTTP request message to the nearest web proxy server in advance; Web page and web content providing method using content caching. The method of claim 7, wherein the step (a) Determining whether the HTTP request message is a content caching target based on the presence or storage value of a specific header of the HTTP request message or determining whether the HTTP request message is a content caching target based on a predetermined policy. doing Web page and web content providing method using content caching. The method of claim 7, wherein the step (d) After processing the downloaded content into a form that can provide the application service, and further comprising the step of storing in the content storage unit Web page and web content providing method using content caching.