CN111416885B - Outer chain rewriting distributed system with fixed-length domain name - Google Patents

Outer chain rewriting distributed system with fixed-length domain name Download PDF

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CN111416885B
CN111416885B CN202010203446.XA CN202010203446A CN111416885B CN 111416885 B CN111416885 B CN 111416885B CN 202010203446 A CN202010203446 A CN 202010203446A CN 111416885 B CN111416885 B CN 111416885B
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domain name
resource
ipv6
rewritten
url
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CN111416885A (en
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郭文强
陈其谋
林志远
谢玉燕
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Fujian Wutongyilian Network Technology Co ltd
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Fujian Wutongyilian Network Technology Co ltd
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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]
    • 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]
    • G06F16/9566—URL specific, e.g. using aliases, detecting broken or misspelled links
    • 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
    • H04L61/30—Managing network names, e.g. use of aliases or nicknames
    • H04L61/301—Name conversion
    • 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
    • H04L67/568—Storing data temporarily at an intermediate stage, e.g. caching
    • 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
    • H04L67/60—Scheduling or organising the servicing of application requests, e.g. requests for application data transmissions using the analysis and optimisation of the required network resources
    • H04L67/63—Routing a service request depending on the request content or context

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Databases & Information Systems (AREA)
  • Theoretical Computer Science (AREA)
  • Data Mining & Analysis (AREA)
  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Information Transfer Between Computers (AREA)

Abstract

According to the external chain rewriting distributed system provided by the invention, when a DNS server detects that an end user supports IPV6, a DNS response containing an IPV6 address is generated and returned to the end user; the CDN edge cache device returns cached page resources or page resources returned by the IPV6 skylight transformation device to the terminal user according to the HTTP request of the terminal user; the IPV6 skylight reconstruction device performs outer chain rewriting of a fixed-length domain name on outer chain resources embedded in response content returned by a resource request initiated by the CDN edge cache device, and returns a rewritten response to the CDN edge cache device; and when detecting that the resource request is the rewritten external link resource URL, restoring the external link resource URL, acquiring the corresponding page resource and returning the page resource to the CDN edge cache device. The system solves the problem that the domain name after rewriting is too long in the prior art, and meanwhile, when a rewritten external link resource request is received, the original domain name can be correctly restored, and the system is suitable for deploying and deploying systems in different parts.

Description

Outer chain rewriting distributed system with fixed-length domain name
Technical Field
The invention belongs to the technical field of solving skylight problems by source station IPV6 transformation, and particularly relates to an outer chain rewriting distributed system with a fixed-length domain name.
Background
The shortage of IPV4 address space has hindered and limited the development of the internet, and therefore, the substitution of IPV6 for IPV4 has been a necessary trend. In the process of modifying the source station IPV6, if only simple conversion from an IPV4 address to an IPV6 address is performed, if a source station using out-link resources by a website does not support the IPV6, the out-link resources cannot be accessed under the environment of pure IPV6, and a skylight problem is caused. Therefore, some existing schemes for upgrading and transforming the IPV6 of the source station can rewrite the external chain of the third party of the website, and solve the skylight problem.
The conventional rewriting method generally includes:
1. changing the character of the existing domain name into the character, and then splicing the general domain name supporting the IPV6 domain name resolution, so that the rewritten domain name can support the IPV6 resolution. But because the DNS namesystem has a limit on the length of the domain name: the limitation of the domain name length at each stage is 63 characters, and the total domain name length cannot exceed 253 characters, so the rewriting mode of the method easily causes the domain name length to exceed the limitation, the DNS analysis cannot be carried out, and the normal access cannot be carried out.
2. Directly replacing the domain name with a fixed domain name which supports IPV6 resolution, and then placing the original domain name in a URI or URL query string behind the domain name. However, in actual operation, many js scripts use logic of a URI or a query string, so that the modification mode can cause the content of the URI or the query string to change, cause js execution exception and easily cause page errors.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides an outer-link rewriting distributed system of a domain name with a fixed length, which solves the problem that the rewritten domain name is too long in the prior art, and meanwhile, when a rewritten outer-link resource request is received, the original domain name can be correctly restored, and the system is suitable for deploying and deploying systems in different parts.
An outer-link rewrite distributed system for fixed-length domain names, comprising:
at least one DNS server: the terminal user DNS request processing module is used for receiving a DNS request initiated by the terminal user, and generating a DNS response containing an IPV6 address to return to the terminal user when the DNS request judges that the terminal user supports IPV 6;
at least one CDN edge cache device: the system comprises a server and a server, wherein the server is used for receiving an HTTP request initiated by a terminal user, returning cached page resources or page resources returned by an IPV6 skylight transformation device to the terminal user according to the HTTP request, and allowing the terminal user to access the page resources;
at least one IPV6 skylight retrofit device: the CDN edge cache device is used for receiving a resource request from the CDN edge cache device; when it is detected that response content corresponding to the resource request needs to be rewritten, performing outer-link rewriting of a fixed-length domain name on an outer-link resource URL contained in the response content, and returning the rewritten response content to the CDN edge cache device; and when the resource request is detected to be the rewritten external link resource URL, restoring the external link resource URL, and acquiring the page resource corresponding to the original URL after restoration and returning the page resource to the CDN edge cache device.
Preferably, the CDN edge cache device is specifically configured to:
receiving an HTTP request initiated by a terminal user;
when the page resources corresponding to the HTTP request are cached in the CDN edge cache device, generating an HTTP response containing the page resources and returning the HTTP response to the terminal user;
and when the page resources corresponding to the HTTP request do not exist in the CDN edge cache device, generating a resource request, sending the resource request to the IPV6 skylight reconstruction device, generating an HTTP response according to the page resources returned by the IPV6 skylight reconstruction device, and returning the HTTP response to the terminal user.
Preferably, the CDN edge caching device is further configured to:
and caching page resources returned by the IPV6 skylight transformation device.
Preferably, the IPV6 skylight retrofitting device is specifically configured to:
when it is detected that the response content corresponding to the resource request contains the external link resource URL, considering that the response content needs to be rewritten, performing external link rewriting of a fixed-length domain name on the external link resource URL contained in the response content, and returning the rewritten response content to the CDN edge cache device;
when the resource request is detected to be the rewritten external link resource URL, restoring the external link resource URL to obtain an original URL, acquiring the page resource from the external link source station according to the original URL, and returning the page resource to the CDN edge cache device.
Preferably, the rewritten external link resource URL format is: encrypting characters-rewriting device ID-security check string-domain name;
the encrypted character is 32 bits, the rewriting device ID is 8 bits, the safety check string is 4 bits, and the universal domain name supports IPV6 resolution.
Preferably, the IPV6 skylight retrofitting device is specifically configured to:
and after the outer chain rewriting of the fixed-length domain name is finished on the outer chain resource URL, adding the corresponding relation among the encrypted characters, the client domain name and the outer chain domain name in the outer chain resource URL obtained after rewriting into a domain name mapping table, and persisting to a disk.
Preferably, the IPV6 skylight retrofitting device is specifically configured to:
and when the resource request is detected to be the rewritten external link resource URL, searching the domain name mapping table to obtain an external link domain name corresponding to the external link resource URL in the resource request in the domain name mapping table, and restoring to obtain the original URL according to the external link domain name.
Preferably, the IPV6 skylight retrofit device is further configured to:
and when the rewritten external link resource URL is obtained, performing security verification on a security verification string in the rewritten external link resource URL, and when the verification fails, closing the connection with the terminal user and refusing the response.
According to the technical scheme, the outer chain rewriting distributed system of the fixed-length domain name provided by the invention has the following advantages:
1. the problem that the rewritten domain name is too long in the conventional rewriting method is avoided.
2. When receiving the rewritten external link resource request, the method can correctly restore the external link resource request to the original domain name and correctly acquire the response of the external link resource.
3. The method is suitable for an IPV6 CDN sub-deployment system, and can be used for rewriting the outer chain resources to solve the skylight problem of source station IPV6 modification while improving the system availability by using the sub-deployment system.
Drawings
In order to more clearly illustrate the detailed description of the invention or the technical solutions in the prior art, the drawings that are needed in the detailed description of the invention or the prior art will be briefly described below. Throughout the drawings, like elements or portions are generally identified by like reference numerals. In the drawings, elements or portions are not necessarily drawn to scale.
Fig. 1 is a block diagram of an out-link rewrite distributed system according to an embodiment of the present invention.
Fig. 2 is a flowchart of an operation method of a CDN edge cache device according to an embodiment of the present invention.
FIG. 3 is a flowchart illustrating a method for operating a sunroof retrofitting device of IPV6 according to an embodiment of the present invention.
Fig. 4 is a flowchart of recovering a URL by the IPV6 skylight modifying device through the domain name mapping table in the third embodiment of the present invention.
Fig. 5 is a flowchart of the security verification of the IPV6 skylight retrofit device in the third embodiment of the present invention.
Detailed Description
Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and therefore are only examples, and the protection scope of the present invention is not limited thereby. It is to be noted that, unless otherwise specified, technical or scientific terms used herein shall have the ordinary meaning as understood by those skilled in the art to which the invention pertains.
It will be understood that the terms "comprises" and/or "comprising," when used in this specification and the appended claims, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.
It is also to be understood that the terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in the specification of the present invention and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
As used in this specification and the appended claims, the term "if" may be interpreted contextually as "when", "upon" or "in response to a determination" or "in response to a detection". Similarly, the phrase "if it is determined" or "if a [ described condition or event ] is detected" may be interpreted contextually to mean "upon determining" or "in response to determining" or "upon detecting [ described condition or event ]" or "in response to detecting [ described condition or event ]".
The first embodiment is as follows:
an outer-link rewrite distribution system for fixed-length domain names, see fig. 1, comprising:
at least one DNS server: the terminal user DNS request processing module is used for receiving a DNS request initiated by the terminal user, and generating a DNS response containing an IPV6 address to return to the terminal user when the DNS request judges that the terminal user supports IPV 6;
at least one CDN edge cache device: the system comprises a server and a server, wherein the server is used for receiving an HTTP request initiated by a terminal user, returning cached page resources or page resources returned by an IPV6 skylight transformation device to the terminal user according to the HTTP request, and allowing the terminal user to access the page resources; referring to fig. 2, the CDN edge cache device is specifically configured to:
receiving an HTTP request initiated by a terminal user;
when the page resources corresponding to the HTTP request are cached in the CDN edge cache device, generating an HTTP response containing the page resources and returning the HTTP response to the terminal user;
and when the page resources corresponding to the HTTP request do not exist in the CDN edge cache device, generating a resource request, sending the resource request to the IPV6 skylight reconstruction device, generating an HTTP response according to the page resources returned by the IPV6 skylight reconstruction device, and returning the HTTP response to the terminal user.
Specifically, after receiving the HTTP response, the terminal user parses the HTTP response, accesses the page resource included in the HTTP response, and the page resource includes the rewritten external link resource URL.
At least one IPV6 skylight retrofit device: the CDN edge cache device is used for receiving a resource request from the CDN edge cache device; when it is detected that response content corresponding to the resource request needs to be rewritten, performing outer-link rewriting of a fixed-length domain name on an outer-link resource URL contained in the response content, and returning the rewritten response content to the CDN edge cache device; and when the resource request is detected to be the rewritten external link resource URL, restoring the external link resource URL, and acquiring the page resource corresponding to the original URL after restoration and returning the page resource to the CDN edge cache device. Referring to fig. 3, the IPV6 skylight retrofitting device is particularly configured for:
when it is detected that the response content corresponding to the resource request contains the external link resource URL, considering that the response content needs to be rewritten, performing external link rewriting of a fixed-length domain name on the external link resource URL contained in the response content, and returning the rewritten response content to the CDN edge cache device;
when the resource request is detected to be the rewritten external link resource URL, restoring the external link resource URL to obtain an original URL, acquiring the page resource from the external link source station according to the original URL, and returning the page resource to the CDN edge cache device.
Specifically, the IPV6 skylight retrofit device is logically separate from the CDN edge servers, but may physically share servers. Referring to fig. 1, assuming that the website visited by the end user relates to the out-link resource, taking the lowermost MAC end user (assumed to be IPV6 user) in fig. 1 as an example, the rewriting method of the system includes the following steps:
step 2.1: a terminal user initiates a DNS request to a DNS server, and the DNS server carries out DNS analysis on the DNS request;
step 2.2: when the DNS server judges that the terminal user supports the IPV6, the DNS server responds to the IPV6 address;
step 2.3: a terminal user initiates an HTTP request to the CDN edge cache device 1 to obtain page resources;
step 2.4: and if the CDN edge cache device 1 has cached page resources, responding to the user. In FIG. 1, the DNS request and HTTP request issued by the mobile phone or the computer refer to steps 1.1-1.4, 3.1-3.4.
Step 1: if the CDN edge cache device 1 does not have cached page resources, requesting resources from the IPV6 skylight reconstruction device 1, returning the IPV6 skylight reconstruction device 1 to the source station to obtain the resources, and determining whether response content corresponding to the resources needs to rewrite the outer link, and if so, performing outer link rewriting on the response content corresponding to the resources;
step 2: the IPV6 skylight reconstruction device 1 returns the returned resources and/or the rewritten response content to the CDN edge cache device 1;
step 2.4: the CDN edge cache device 1 responds the returned page request to the end user.
The method comprises the following steps of assuming that when receiving the condition that the terminal user accesses the external link resource which is rewritten last time:
step 2.5: a terminal user initiates an HTTP request to the CDN edge cache device 2 to obtain page resources;
step 2.10: and if the CDN edge cache device 2 has cached page resources, responding to the user.
Step 2.6: if the CDN edge cache device 2 does not have cached page resources, the CDN edge cache device requests resources from the IPV6 skylight reconstruction device 3;
step 2.7: the IPV6 skylight reconstruction device 3 judges that the external link resource URL in the resource request is rewritten by the IPV6 skylight reconstruction device 3 according to the rewriting rule, restores the original URL according to the rewriting rule, and sends the request to the external link source station by using the original URL;
step 2.8: the external link source station obtains a response and returns the response to the IPV6 skylight improvement device 3;
step 2.9: the IPV6 skylight retrofit device 3 responds to the CDN edge server 2.
Step 2.10: the CDN edge cache 2 responds to the user.
The outer chain rewriting distributed system of the domain name with fixed length has the following advantages:
1. the problem that the rewritten domain name is too long in the conventional rewriting method is avoided.
2. When receiving the rewritten external link resource request, the method can correctly restore the external link resource request to the original domain name and correctly acquire the response of the external link resource.
3. The method is suitable for an IPV6 CDN sub-deployment system, and can be used for rewriting the outer chain resources to solve the skylight problem of source station IPV6 modification while improving the system availability by using the sub-deployment system.
Preferably, the CDN edge caching device is further configured to:
and caching page resources returned by the IPV6 skylight transformation device.
Specifically, the CDN edge caching device receives the page resource returned by the IPV6 skylight modified device, and stores the page resource to a disk if the page resource can be cached. Therefore, when the resource request of the terminal user reaches the CDN edge cache device, the CDN edge cache device may directly return the cached page resource.
Example two:
the second embodiment adds a specific rewriting method on the basis of the first embodiment:
the rewritten external link resource URL format is as follows: encrypting characters-rewriting device ID-security check string-domain name;
the encrypted character is 32 bits, the rewriting device ID is 8 bits, the safety check string is 4 bits, and the universal domain name supports IPV6 resolution.
Specifically, the format of the rewritten out-link resource URL is: 32-bit encrypted characters-8-bit rewrite device ID-4-bit safety check string, and supports the domain name analyzed by IPV 6; for example: 4076ac4 fcaccc 1a1cc1ebb6c8c5706b06-6f067506-x94o.
Because the domain names obtained by the rewriting method are all the same in length, the situation that the domain names are overlong after being rewritten in the conventional rewriting method does not occur. The 32-bit encrypted character includes an MD5 value and a hash value, and may be a fixed-length character string calculated by using an MD5 algorithm or other algorithms, for example, the out-link domain name is www.ipv4.com, the client domain name is www.custom.com, and the 32-bit hash value of the rewritten domain name is 4076ac4fcacc1a1cc1ebb6c8c5706b 06. The 8-bit rewriting device ID can be obtained by 16-system conversion of the IPV6 skylight renovation device IP, and is mainly used for distinguishing the rewritten IPV6 skylight renovation device, or can be obtained according to a certain rule, as long as the CDN edge cache device can find the IPV6 skylight renovation device. For example, the IPV6 skylight retrofit device IP is: 111.6.171.6, an 8-bit overwriting device ID can be represented using 6f 067506. The 4-bit security check string may be simply configured in the client domain name or otherwise calculated.
For the sake of brief description, the embodiments of the present invention do not refer to the corresponding contents in the foregoing embodiments of the present invention.
Example three:
third embodiment on the basis of the above embodiments, a method for restoring the original URL through the domain name mapping table is added.
The IPV6 skylight reconstruction device is particularly used for:
and after the outer chain rewriting of the fixed-length domain name is finished on the outer chain resource URL, adding the corresponding relation among the encrypted characters, the client domain name and the outer chain domain name in the outer chain resource URL obtained after rewriting into a domain name mapping table, and persisting to a disk.
Specifically, after the outer link resource URL is rewritten, the correspondence between the encrypted characters in the outer link resource URL obtained after rewriting, the client domain name, and the outer link domain name may be persisted to a disk, including persisted in a text or a database, to obtain a domain name mapping table. For example, after the URL of the out-link resource is rewritten in the above example, the IPV6 skylight creating device stores one record: 4076ac4 fcaccc 1a1cc1ebb6c8c5706b06 www.ipv4.com www.custom.com.
Referring to fig. 4, the IPV6 skylight retrofit device is specifically configured to:
and when the resource request is detected to be the rewritten external link resource URL, searching the domain name mapping table to obtain an external link domain name corresponding to the external link resource URL in the resource request in the domain name mapping table, and restoring to obtain the original URL according to the external link domain name.
Specifically, when the IPV6 skylight modification apparatus stores the rewrite record in the domain name mapping table, if the rewritten external link resource URL is received, the corresponding external link domain name can be found according to the 32-bit encrypted character in the rewritten external link resource URL, and the original URL is restored. For example, the rewritten out-link resource URL is: 4076ac4 fcaccc 1a1cc1ebb6c8c5706b06-6f 067506-x94o.wanwuyuunian.com; the IPV6 skylight retrofit device reads the encrypted characters: 4076ac4 fcaccc 1a1cc1ebb6c8c5706b06, and then looks up the domain name mapping table to find the domain name of the original URL is www.ipv4.com.
Referring to fig. 5, the IPV6 skylight retrofit device is also configured to:
and when the rewritten external link resource URL is obtained, performing security verification on a security verification string in the rewritten external link resource URL, and when the verification fails, closing the connection with the terminal user and refusing the response.
Specifically, when a user accesses a rewritten resource request to the IPV6 skylight renovation device, the IPV6 skylight renovation device needs to perform security judgment on an outer link to determine whether the outer link is rewritten by the IPV6 skylight renovation device, and if not, it indicates an illegal request, close the connection or reject the response. And the safety judgment process is to perform safety check on the 4-bit safety check string of the rewritten external link resource URL.
For the sake of brief description, the embodiments of the present invention do not refer to the corresponding contents in the foregoing embodiments of the present invention.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention, and they should be construed as being included in the following claims and description.

Claims (8)

1. An outer-link rewrite distributed system for fixed-length domain names, comprising:
at least one DNS server: the terminal user DNS request processing module is used for receiving a DNS request initiated by the terminal user, and generating a DNS response containing an IPV6 address to return to the terminal user when the DNS request judges that the terminal user supports IPV 6;
at least one CDN edge cache device: the system comprises a server and a server, wherein the server is used for receiving an HTTP request initiated by a terminal user, returning cached page resources or page resources returned by an IPV6 skylight transformation device to the terminal user according to the HTTP request, and allowing the terminal user to access the page resources;
at least one IPV6 skylight retrofit device: the CDN edge cache device is used for receiving a resource request from the CDN edge cache device; when it is detected that response content corresponding to the resource request needs to be rewritten, performing outer-link rewriting of a fixed-length domain name on an outer-link resource URL contained in the response content, and returning the rewritten response content to the CDN edge cache device; and when the resource request is detected to be the rewritten external link resource URL, restoring the external link resource URL, and acquiring the page resource corresponding to the original URL after restoration and returning the page resource to the CDN edge cache device.
2. The system according to claim 1, wherein the CDN edge cache device is specifically configured to:
receiving an HTTP request initiated by a terminal user;
when the page resources corresponding to the HTTP request are cached in the CDN edge cache device, generating an HTTP response containing the page resources and returning the HTTP response to the terminal user;
and when the page resources corresponding to the HTTP request do not exist in the CDN edge cache device, generating a resource request, sending the resource request to the IPV6 skylight reconstruction device, generating an HTTP response according to the page resources returned by the IPV6 skylight reconstruction device, and returning the HTTP response to the terminal user.
3. The system of claim 2, wherein the CDN edge cache is further configured to:
and caching page resources returned by the IPV6 skylight transformation device.
4. The outer-link rewrite distribution system for fixed-length domain names of claim 1, wherein the IPV6 skylight-modifying apparatus is specifically configured to:
when it is detected that the response content corresponding to the resource request contains the external link resource URL, considering that the response content needs to be rewritten, performing external link rewriting of a fixed-length domain name on the external link resource URL contained in the response content, and returning the rewritten response content to the CDN edge cache device;
when the resource request is detected to be the rewritten external link resource URL, restoring the external link resource URL to obtain an original URL, acquiring the page resource from the external link source station according to the original URL, and returning the page resource to the CDN edge cache device.
5. The fixed length domain name out-chaining rewriting distribution system of claim 4,
the rewritten external link resource URL format is as follows: encrypting characters-rewriting device ID-security check string-domain name;
the encrypted character is 32 bits, the rewriting device ID is 8 bits, the safety check string is 4 bits, and the universal domain name supports IPV6 resolution.
6. The fixed-length domain name outer-link rewrite distribution system of claim 5, wherein the IPV6 skylight-modifying apparatus is further configured to:
and after the outer chain rewriting of the fixed-length domain name is finished on the outer chain resource URL, adding the corresponding relation among the encrypted characters, the client domain name and the outer chain domain name in the outer chain resource URL obtained after rewriting into a domain name mapping table, and persisting to a disk.
7. The fixed-length domain name outer-link rewrite distribution system of claim 6, wherein the IPV6 skylight-modifying apparatus is further configured to:
and when the resource request is detected to be the rewritten external link resource URL, searching the domain name mapping table to obtain an external link domain name corresponding to the external link resource URL in the resource request in the domain name mapping table, and restoring to obtain the original URL according to the external link domain name.
8. The fixed-length domain name outer-link rewrite distribution system of claim 5, wherein the IPV6 skylight-modifying apparatus is further configured to:
and when the rewritten external link resource URL is obtained, performing security verification on a security verification string in the rewritten external link resource URL, and when the verification fails, closing the connection with the terminal user and refusing the response.
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