CN110855766A - Method and device for accessing Web resources and proxy server - Google Patents
Method and device for accessing Web resources and proxy server Download PDFInfo
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/01—Protocols
- H04L67/02—Protocols based on web technology, e.g. hypertext transfer protocol [HTTP]
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F16/00—Information retrieval; Database structures therefor; File system structures therefor
- G06F16/90—Details of database functions independent of the retrieved data types
- G06F16/95—Retrieval from the web
- G06F16/955—Retrieval from the web using information identifiers, e.g. uniform resource locators [URL]
- G06F16/9562—Bookmark management
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F16/00—Information retrieval; Database structures therefor; File system structures therefor
- G06F16/90—Details of database functions independent of the retrieved data types
- G06F16/95—Retrieval from the web
- G06F16/958—Organisation or management of web site content, e.g. publishing, maintaining pages or automatic linking
- G06F16/972—Access to data in other repository systems, e.g. legacy data or dynamic Web page generation
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L61/00—Network arrangements, protocols or services for addressing or naming
- H04L61/09—Mapping addresses
- H04L61/10—Mapping addresses of different types
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L61/00—Network arrangements, protocols or services for addressing or naming
- H04L61/45—Network directories; Name-to-address mapping
- H04L61/4505—Network directories; Name-to-address mapping using standardised directories; using standardised directory access protocols
- H04L61/4511—Network directories; Name-to-address mapping using standardised directories; using standardised directory access protocols using domain name system [DNS]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/50—Network services
- H04L67/56—Provisioning of proxy services
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Abstract
The invention discloses a method and a device for accessing Web resources and a proxy server, wherein the proxy server is used for analyzing a resource page returned by the resource server and replacing a preset sub-domain name address in the resource page according to a preset replacement rule so as to realize the purpose of acting on the sub-domain name resource in the resource page through the proxy server, thereby meeting the requirement of a user on accessing complex page resources of a large website.
Description
Technical Field
The invention relates to the technical field of computers, in particular to a method and a device for accessing Web resources and a proxy server.
Background
With the popularization and development of network technology and computers, proxy services are becoming more forms of online application. The proxy service means that an internal network sends a connection request to an Internert, and the proxy service needs to be formulated to send the HTTP which is directly transmitted to the Web server to the proxy server. In other words, the proxy service is a transfer station for network information. The proxy server is used as another type of server between the browser and the Web server and is provided, and the browser does not need to directly access the Web server to acquire a webpage, and only needs to send a required request to the proxy server and transmit the required request to the browser required by a visitor through the proxy server. The common Web proxy server only supports access requests to the internal network, and the reverse proxy service does not have obvious conflict with the common proxy method. If a proxy server can proxy external network hosts to access the internal network, this type of proxy service model is referred to as reverse proxy service. Therefore, two ways can be provided in the firewall of the system, and the reverse proxy is used for serving external network access, thereby providing the capability of the internal network to access the external network. The reverse proxy function is reasonably combined with firewall software for refusing external access, so that a firewall system which not only contains an internal network, but also can issue Web information to the outside is constructed. The reverse proxy function may provide comprehensive connection logging, thereby providing the ability to prevent, capture information.
However, some large websites use sub domain names under the main domain name due to the fact that services are abundant and the service structure is complex, different services and resources are accessed according to different sub domain names, domain names of some resources are not matched with the main domain name on some webpages, and therefore the resources cannot be accessed through reverse proxy services.
Disclosure of Invention
The invention provides a method and a device for accessing Web resources and a proxy server, which aim to solve the problem that resources cannot be accessed in the reverse proxy process in the prior art.
In a first aspect, the present invention provides a method for accessing a Web resource, which is applied to a proxy server, and includes: analyzing a resource page returned by a resource server, and replacing a preset sub-domain name address in the resource page according to a preset replacement rule, wherein the resource page is a page requested by a client to the resource server through the proxy server; and sending the resource page with the sub domain name replaced to the client.
Preferably, the preset replacement rule is a domain name address corresponding relationship between the resource server and the proxy server.
Preferably, the parsing the resource page returned by the resource server includes:
and analyzing the sub-domain name resource in the resource page returned by the resource server, and searching the sub-domain name containing the preset label attribute in the resource page.
Preferably, the tag attributes include one or more of: the src attribute of frame, iframe, input, and img tags, and the href attribute of a and link tags.
Preferably, replacing the preset sub-domain name address in the resource page according to a preset replacement rule includes: and replacing the sub-domain name address containing the preset label attribute in the resource page according to the preset replacement rule so as to convert the sub-domain name address containing the preset label attribute into the domain name address under the proxy server.
Preferably, after sending the resource page after replacing the sub domain name to the client, the method further includes: when receiving that the client initiates access to the replaced domain name, matching the domain name address accessed by the client with the preset replacement rule, converting the domain name address accessed by the client into an address corresponding to the resource server, and requesting a resource page from the resource server according to the domain name address after replacement.
In a second aspect, the present invention provides an apparatus for accessing a Web resource, the apparatus comprising:
the analysis unit is used for analyzing the resource page returned by the resource server;
the replacing unit is used for replacing a preset sub-domain name address in the resource page according to a preset replacing rule, wherein the resource page is a page requested by the client to the resource server through the proxy server;
and the sending unit is used for sending the resource page with the sub domain name replaced to the client.
Preferably, the parsing unit is further configured to parse the sub domain name resource in the resource page returned by the resource server, and search the sub domain name including the preset tag attribute in the resource page.
Preferably, the replacing unit is further configured to replace, according to the preset replacement rule, the sub domain name address containing the preset label attribute in the resource page, so as to convert the sub domain name address containing the preset label attribute into the domain name address under the proxy server.
Preferably, the replacing unit is further configured to, when it is received that the client initiates access to the replaced domain name, perform matching according to the domain name address accessed by the client and the preset replacing rule, convert the domain name address accessed by the client into an address corresponding to the resource server, and request a resource page from the resource server according to the replaced domain name address.
In a third aspect, the present invention provides a proxy server, where the proxy server includes a processor and a storage device, where the storage device stores a plurality of instructions to implement a configuration method of a reference signal, and the processor executes the plurality of instructions to implement: analyzing a resource page returned by a resource server, and replacing a preset sub-domain name address in the resource page according to a preset replacement rule, wherein the resource page is a page requested by a client to the resource server through the proxy server; and sending the resource page with the sub domain name replaced to the client.
In a fourth aspect, the present invention provides a computer-readable storage medium storing a signal-mapped computer program, which when executed by at least one processor, implements any of the above-described methods for accessing a Web resource.
The invention has the following beneficial effects:
according to the invention, the proxy server is used for analyzing the resource page returned by the resource server and replacing the preset sub-domain name address in the resource page according to the preset replacement rule, so that the sub-domain name resource in the resource page is proxied through the proxy server, and the access of a user to the complex page resource of a large website is met.
Drawings
Fig. 1 is a schematic flowchart of a method for accessing a Web resource according to an embodiment of the present invention;
FIG. 2 is a flowchart illustrating another method for accessing a Web resource according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of an apparatus for accessing a Web resource according to an embodiment of the present invention.
Detailed Description
In order to solve the problem that some resources cannot be accessed in the existing reverse proxy process, the invention provides a method for accessing Web resources, which carries out proxy on sub domain name resources in a resource page through a proxy server so as to meet the access of a user to complex page resources of a large website. The present invention will be described in further detail below with reference to the drawings and examples. It should be understood that the specific embodiments described herein are merely illustrative of the invention and do not limit the invention.
First embodiment
A first embodiment of the present invention provides a method for accessing a Web resource, which is applied to a proxy server, and with reference to fig. 1, the method includes:
s101, analyzing a resource page returned by a resource server;
the resource page is a page requested by a client to the resource server through the proxy server;
specifically, the sub-domain name resource in the resource page returned by the resource server is analyzed, and the sub-domain name containing the preset label attribute is searched in the resource page.
The sub-domain name in the embodiment of the invention belongs to a domain of a higher layer in the domain name system level. For example, mail.example.com and calendar.example.com are two sub-domains of example.com, and example.com is a sub-domain of top level domain.com.
The label attribute in the embodiment of the invention comprises one or more of the following: the src attribute of the img tag (i.e., the tag for displaying a picture), the frame, the iframe tag (i.e., the tag for which the type is image), the script tag (i.e., the tag for defining a client script), the href attribute of the a tag (i.e., the hyperlink tag) and the link tag (i.e., the header tag), and so on, which can be arbitrarily set by those skilled in the art according to actual needs in specific implementations, and the present invention is not limited thereto.
S102, replacing a preset sub-domain name address in the resource page according to a preset replacement rule;
the preset replacement rule in the embodiment of the present invention is a domain name address corresponding relationship between the resource server and the proxy server.
Specifically, in the embodiment of the present invention, a domain name address correspondence between a resource server and a proxy server is set in advance, for example, a host name is set to ". abc.com", and an IP is resolved to, for example: 218.104.78.100, since it is a wildcard, it indicates that all sub-domain names before abc.com will resolve to 218.104.78.100, which means that, for example, the input bbs.abc.com or 123.abc.com or 123.234.abc.com will resolve to 218.104.78.100, that is, the embodiment of the present invention is that the proxy server uses a generic domain name resolution configuration, for example, by using a wildcard, so that both the main domain name and the sub-domain name can match to the same proxy rule, and the server can resolve to the proxy server in response to the sub-domain name request related to the content, and the proxy server makes a proxy request to the corresponding resource.
It should be noted that the above sub-domain name address replacement is only an example, and in the implementation, a person skilled in the art may set a specific replacement rule according to actual needs.
And S103, sending the resource page with the sub domain name replaced to the client.
In the embodiment of the invention, the reverse proxy server acquires resources from one or more groups of back-end resource servers (such as Web servers) associated with the reverse proxy server according to the request of the client, and then returns the resources to the client. Namely, the embodiment of the invention carries out proxy on the sub domain name resource in the resource page through the proxy server, thereby meeting the requirement of the user to access the complex page resource of the large website.
Generally speaking, the embodiment of the invention can realize the proxy request of the sub domain name by configuring the general domain name matching rule through the proxy server and replacing the corresponding resource address during proxy.
In specific implementation, the embodiment of the present invention needs to configure a domain name of a proxy server, where a client may access the proxy server through the domain name and a sub-domain name, then configure an actual domain name parameter of a resource of the proxy server, configure a replacement rule (i.e., the preset replacement rule) of the sub-domain name of the proxy server, and replace a link related to the actual sub-domain name in a page structure with an accessible sub-domain name of the proxy server.
The method according to the invention will be examined in detail below with reference to fig. 2 by way of a specific example:
1) configuring a domain name of a proxy server, and accessing the proxy server according to the domain name, such as vpn.
2) A user uses url to perform HTTP access to a resource homepage through a browser;
3) proxy server performs proxy access according to the resource address requested by the user, such as www.project.com;
4) the resource server returns a resource page to the proxy server, and sub domain name resources such as name.project.com and the like are contained in the page;
5) the proxy server analyzes the resource returned by the resource server, domain name resource addresses in label attributes defined in rules such as link, a, img and script are searched in a page structure according to preset replacement rules to be analyzed, corresponding replacement is carried out on the sub-domain name structure according to the preset replacement rules, and the replaced page information is returned to a user browser, for example, name.project.com in the labels such as link, a and script is replaced by name.vpn.topsec.com;
6) the user browser analyzes the page returned by the proxy server and initiates access to the required replaced sub-domain name resource again; .
7) The proxy server performs rule matching according to the accessed address, and if the resource address is replaced, the resource address in the label defined in the rule is replaced by the original correct address, for example, the request address of name.vpn.topsec.com in the label such as link, a, script and the like is replaced by the name.project.com;
8) and repeating the steps 3-7 until the user browser finishes accessing all required resources.
The embodiment of the invention can realize the proxy of the resource with the sub-domain name in the resource page through the proxy server, meets the requirement of a user on the proxy of the complex page resource of a large-scale website, can realize the proxy of any number of sub-domain names through setting, can proxy the number of the sub-domain names without limit by configuring the preset replacement rule of the proxy server, and can proxy the complex sub-domain names and the multi-level domain names through configuring the inclusion analysis replacement rule and the request address replacement rule of the proxy server.
The core content of the embodiment of the invention is that the proxy server analyzes the resource content of the proxy request, the link address in the response content is analyzed and replaced according to the label with the resource link in the self-defined replacement rule, if the resource address is the resource in the sub-domain name, the sub-domain name is replaced by the domain name capable of analyzing the address of the proxy server, the proxy server performs corresponding replacement on the request address after the client browser sends the request to the proxy server next time, the request address is replaced by the real resource address, and the result is returned to the client browser.
A second embodiment of the present invention provides an apparatus for accessing a Web resource, and referring to fig. 3, the apparatus includes: the analysis unit is used for analyzing the resource page returned by the resource server;
the replacing unit is used for replacing a preset sub-domain name address in the resource page according to a preset replacing rule, wherein the resource page is a page requested by the client to the resource server through the proxy server;
and the sending unit is used for sending the resource page with the sub domain name replaced to the client.
In the embodiment of the invention, the reverse proxy server acquires resources from one or more groups of back-end resource servers (such as Web servers) associated with the reverse proxy server according to the request of the client, and then returns the resources to the client. Namely, the embodiment of the invention carries out proxy on the sub domain name resource in the resource page through the proxy server, thereby meeting the requirement of the user to access the complex page resource of the large website.
In specific implementation, in the embodiment of the present invention, the parsing unit is further configured to parse the sub domain name resource in the resource page returned by the resource server, and search the sub domain name including the preset tag attribute in the resource page.
The preset replacement rule in the embodiment of the present invention is a domain name address corresponding relationship between the resource server and the proxy server.
Further, in this embodiment of the present invention, the replacing unit is further configured to replace, according to the preset replacement rule, a sub domain name address including a preset tag attribute in the resource page, so as to convert the sub domain name address including the preset tag attribute into a domain name address under the proxy server.
In specific implementation, the replacing unit in this embodiment of the present invention is further configured to, when receiving that the client initiates access to the replaced domain name, match the domain name address accessed by the client with the preset replacing rule, convert the domain name address accessed by the client into an address corresponding to the resource server, and request a resource page from the resource server according to the replaced domain name address.
Specifically, in the embodiment of the present invention, a domain name address correspondence between a resource server and a proxy server is set in advance, for example, a host name is set to ". abc.com", and an IP is resolved to, for example: 218.104.78.100, since it is a wildcard, it indicates that all sub-domain names before abc.com will resolve to 218.104.78.100, which means that, for example, the input bbs.abc.com or 123.abc.com or 123.234.abc.com will resolve to 218.104.78.100, that is, the embodiment of the present invention is that the proxy server uses a generic domain name resolution configuration, for example, by using a wildcard, so that both the main domain name and the sub-domain name can match to the same proxy rule, and the server can resolve to the proxy server in response to the sub-domain name request related to the content, and the proxy server makes a proxy request to the corresponding resource.
It should be noted that the above sub-domain name address replacement is only an example, and in the implementation, a person skilled in the art may set a specific replacement rule according to actual needs.
Generally speaking, the embodiment of the invention can realize the proxy request of the sub domain name by configuring the general domain name matching rule through the proxy server and replacing the corresponding resource address during proxy.
In specific implementation, the embodiment of the present invention needs to configure a domain name of a proxy server, where a client may access the proxy server through the domain name and a sub-domain name, then configure an actual domain name parameter of a resource of the proxy server, configure a replacement rule (i.e., the preset replacement rule) of the sub-domain name of the proxy server, and replace a link related to the actual sub-domain name in a page structure with an accessible sub-domain name of the proxy server.
The relevant content of the embodiment of the present invention can be understood by referring to the first embodiment of the present invention, and the detailed description of the embodiment of the present invention is omitted.
A third embodiment of the present invention provides a computer-readable storage medium storing a signal-mapped computer program which, when executed by at least one processor, implements the method for accessing a Web resource as set forth in any one of the first embodiments of the present invention.
The relevant content of the embodiment of the present invention can be understood by referring to the first embodiment of the present invention, and the detailed description of the embodiment of the present invention is omitted.
A fourth embodiment of the present invention provides a proxy server, where the proxy server includes a processor and a storage device, where the storage device stores a plurality of instructions to implement a reference signal configuration method, and the processor executes the plurality of instructions to implement:
analyzing a resource page returned by a resource server, and replacing a preset sub-domain name address in the resource page according to a preset replacement rule, wherein the resource page is a page requested by a client to the resource server through the proxy server;
and sending the resource page with the sub domain name replaced to the client.
The relevant content of the embodiments of the present invention can be understood by referring to the first embodiment of the present invention, and detailed description is not repeated herein.
Although the preferred embodiments of the present invention have been disclosed for illustrative purposes, those skilled in the art will appreciate that various modifications, additions and substitutions are possible, and the scope of the invention should not be limited to the embodiments described above.
Claims (12)
1. A method for accessing Web resources, applied to a proxy server, includes:
analyzing a resource page returned by a resource server, and replacing a preset sub-domain name address in the resource page according to a preset replacement rule, wherein the resource page is a page requested by a client to the resource server through the proxy server;
and sending the resource page with the sub domain name replaced to the client.
2. The method of claim 1,
the preset replacement rule is a domain name address corresponding relation between the resource server and the proxy server.
3. The method of claim 1, wherein parsing the resource page returned by the resource server comprises:
and analyzing the sub-domain name resource in the resource page returned by the resource server, and searching the sub-domain name containing the preset label attribute in the resource page.
4. The method of claim 3,
the tag attributes include one or more of: the src attribute of frame, iframe, input, and img tags, and the href attribute of a and link tags.
5. The method according to claim 3, wherein replacing the preset sub-domain name address in the resource page according to a preset replacement rule comprises:
and replacing the sub-domain name address containing the preset label attribute in the resource page according to the preset replacement rule so as to convert the sub-domain name address containing the preset label attribute into the domain name address under the proxy server.
6. The method of claim 5, wherein after sending the resource page with the replaced sub-domain name to the client, the method further comprises:
when receiving that the client initiates access to the replaced domain name, matching the domain name address accessed by the client with the preset replacement rule, converting the domain name address accessed by the client into an address corresponding to the resource server, and requesting a resource page from the resource server according to the domain name address after replacement.
7. An apparatus for accessing a Web resource, comprising:
the analysis unit is used for analyzing the resource page returned by the resource server;
the replacing unit is used for replacing a preset sub-domain name address in the resource page according to a preset replacing rule, wherein the resource page is a page requested by the client to the resource server through the proxy server;
and the sending unit is used for sending the resource page with the sub domain name replaced to the client.
8. The apparatus of claim 7,
the analysis unit is further configured to analyze the sub-domain name resource in the resource page returned by the resource server, and search the sub-domain name containing the preset tag attribute in the resource page.
9. The method of claim 8,
the replacing unit is further configured to replace the sub-domain name address containing the preset label attribute in the resource page according to the preset replacing rule, so as to convert the sub-domain name address containing the preset label attribute into the domain name address under the proxy server.
10. The apparatus of claim 9,
the replacing unit is further configured to, when receiving that the client initiates access to the replaced domain name, match the domain name address accessed by the client with the preset replacing rule, convert the domain name address accessed by the client into an address corresponding to the resource server, and request a resource page from the resource server according to the replaced domain name address.
11. A proxy server, comprising a processor and a storage device, wherein the storage device stores a plurality of instructions for implementing a reference signal configuration method, and the processor executes the plurality of instructions for implementing:
analyzing a resource page returned by a resource server, and replacing a preset sub-domain name address in the resource page according to a preset replacement rule, wherein the resource page is a page requested by a client to the resource server through the proxy server;
and sending the resource page with the sub domain name replaced to the client.
12. A computer-readable storage medium, in which a signal-mapped computer program is stored, which, when being executed by at least one processor, carries out the method of accessing a Web resource of any one of claims 1 to 6.
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