CN117082029A - Access method and device based on line cache, electronic equipment and storage medium - Google Patents
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- 238000004458 analytical method Methods 0.000 claims abstract description 37
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Classifications
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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
- H04L67/568—Storing data temporarily at an intermediate stage, e.g. caching
Abstract
The embodiment of the disclosure provides an access method, an access device, electronic equipment and a storage medium based on line cache, which are applied to the technical field of data processing. The method comprises the steps of receiving a first domain name resolution request sent by a client; acquiring line information corresponding to an IP address of a client; if the analysis results corresponding to the first domain name analysis request and the line information are not found in the configured line cache, sending a second domain name analysis request to a Authoritative DNS server so that the Authoritative DNS server can analyze the second domain name analysis request to obtain an IP address of the CDN node; and receiving the CDN node IP address, and sending the CDN node IP address to the client so that the client can access the CDN node corresponding to the CDN node IP address. The access of the client is realized by utilizing the line cache, the number of the DNS servers is not needed to be excessive, the access quantity is reduced, and the access efficiency of the client is improved; the accuracy of the access of the client is improved through the isolation of the line.
Description
Technical Field
The disclosure relates to the technical field of data processing, and in particular relates to an access method, an access device, electronic equipment and a storage medium based on line cache.
Background
Access by clients through DNS is a common network communication means, DNS (Domain Name System) for converting human-readable domain names into computer-identifiable IP addresses. The DNS converts a complex IP address into a domain name that is easy to remember, so that a user can access internet resources more conveniently, and by inputting a simple domain name instead of a complex digital address, the user can browse web pages, send e-mails, use various applications, etc. more easily; through DNS, the client can dynamically discover and access a plurality of instances of the specific service, so that load balancing is realized, and the performance and stability of the system are improved; the DNS cache can accelerate the access process, reduce the time for inquiring the IP address, once the domain name is resolved, the client can cache the result locally, and the cached information is directly used when the same domain name is accessed again next time, so that repeated DNS inquiry is avoided, delay is reduced, network traffic is reduced, and network efficiency is improved. Thus, access through DNS is of great practical importance.
At present, in the process that a client accesses through DNS, an Anycast DNS server is generally used for communication access, and because the Anycast DNS server is public and free, the access frequency is high, the situation of resolving abnormality is easy to cause, and the client cannot accurately access. Therefore, there is a need for a line cache based access method, apparatus, electronic device and storage medium with higher accuracy.
Disclosure of Invention
The disclosure provides an access method, an access device, electronic equipment and a storage medium based on line cache.
According to a first aspect of the present disclosure, there is provided a line cache based access method. The method comprises the following steps:
receiving a first domain name resolution request sent by a client;
acquiring line information corresponding to the IP address of the client;
if the analysis results corresponding to the first domain name analysis request and the line information are not found in the configured line cache, sending a second domain name analysis request to a Authoritative DNS server so that the Authoritative DNS server can analyze the second domain name analysis request to obtain an IP address of a CDN node;
and receiving the CDN node IP address, and sending the CDN node IP address to the client so that the client can access CDN nodes corresponding to the CDN node IP address.
Further, the Local DNS server is obtained by selecting the Local DNS server intensive cluster through a four-layer switch according to the first domain name resolution request sent by the client.
Further, the line information is obtained by analyzing the IP address of the client through GeoIP.
Further, the sending the second domain name resolution request to the Authoritative DNS server includes:
acquiring a subnet address of the client;
obtaining the second domain name resolution request according to the subnet address, the self IP address of the Local DNS server and the first domain name resolution request;
the second domain name resolution request is sent to the Authoritative DNS server.
Further, the geographic position corresponding to the CDN node IP address is the same as the geographic position corresponding to the line information.
Further, the method further comprises:
after receiving the CDN node IP address, storing a domain name, line information, and the CDN node IP address corresponding to the first domain name resolution request in the line cache.
Further, the method further comprises:
if the analysis results corresponding to the first domain name analysis request and the line information are found in the configured line cache, the analysis results are sent to the client so that the client can access CDN nodes corresponding to the analysis results.
According to a second aspect of the present disclosure, there is provided a line cache based access device. The device comprises:
the receiving module is used for receiving a first domain name resolution request sent by the client;
the acquisition module is used for acquiring the line information corresponding to the IP address of the client;
the first sending module is configured to send a second domain name resolution request to a Authoritative DNS server if resolution results corresponding to the first domain name resolution request and the line information are not found in the configured line cache, so that the Authoritative DNS server can conveniently resolve the second domain name resolution request to obtain an IP address of a CDN node;
the second sending module is configured to receive the CDN node IP address, and send the CDN node IP address to the client, so that the client accesses a CDN node corresponding to the CDN node IP address.
According to a third aspect of the present disclosure, an electronic device is provided. The electronic device includes: the system comprises a memory and a processor, wherein the memory stores a computer program, and the processor realizes the method when executing the program.
According to a fourth aspect of the present disclosure, there is provided a computer readable storage medium having stored thereon a computer program which when executed by a processor implements the method.
The method comprises the steps of receiving a first domain name resolution request sent by a client; acquiring line information corresponding to the IP address of the client; if the analysis results corresponding to the first domain name analysis request and the line information are not found in the configured line cache, sending a second domain name analysis request to a Authoritative DNS server so that the Authoritative DNS server can analyze the second domain name analysis request to obtain an IP address of a CDN node; and receiving the CDN node IP address, and sending the CDN node IP address to the client so that the client can access CDN nodes corresponding to the CDN node IP address. The access of the client is realized by utilizing the line cache, the number of the DNS servers is not needed to be excessive, the access quantity is reduced, and the access efficiency of the client is improved; the accuracy of the access of the client is improved through the isolation of the line.
It should be understood that the description in this summary is not intended to limit key or critical features of the disclosed embodiments, nor is it intended to limit the scope of the disclosure. Other features of the present disclosure will become apparent from the following description.
Drawings
The above and other features, advantages and aspects of embodiments of the present disclosure will become more apparent by reference to the following detailed description when taken in conjunction with the accompanying drawings. The drawings are for a better understanding of the present solution and are not to be construed as limiting the present disclosure. In the drawings, wherein like or similar reference numerals denote like or similar elements, in which:
FIG. 1 illustrates a flow chart of a line cache based access method according to an embodiment of the present disclosure;
FIG. 2 illustrates a block diagram of a line cache based access device, according to an embodiment of the present disclosure;
fig. 3 illustrates a block diagram of an exemplary electronic device capable of implementing embodiments of the present disclosure.
Detailed Description
For the purposes of making the objects, technical solutions and advantages of the embodiments of the present disclosure more apparent, the technical solutions of the embodiments of the present disclosure will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present disclosure, and it is apparent that the described embodiments are some embodiments of the present disclosure, but not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments in this disclosure without inventive faculty, are intended to be within the scope of this disclosure.
In addition, the term "and/or" herein is merely an association relationship describing an association object, and means that three relationships may exist, for example, a and/or B may mean: a exists alone, A and B exist together, and B exists alone. In addition, the character "/" herein generally indicates that the front and rear associated objects are an "or" relationship.
Fig. 1 shows a flowchart of a line cache based access method 100 according to an embodiment of the present disclosure, the method 100 being applied to a Local DNS server, the method 100 comprising:
s101, receiving a first domain name resolution request sent by a client.
In some embodiments, the Local DNS server is obtained by selecting, by the Local DNS server intensive cluster, through a four-layer switch according to the first domain name resolution request sent by the client. For example, after receiving a first domain name resolution request sent by a client, the Local DNS server intensive cluster forwards the first domain name resolution request to the DNS server 1, the DNS server 2 and the DNS server 3 through a four-layer switch, so as to realize backup among all systems and load balancing of domain names and DNS servers, and enable two other DNS servers to continue providing services under the condition that any one of the DNS server 1, the DNS server 2 and the DNS server 3 is down, thereby realizing integral disaster recovery; and the Local DNS server intensive cluster is selected from the DNS server 1, the DNS server 2 and the DNS server 3, and the Local DNS server intensive cluster selects the DNS server 1 as a Local DNS server of the client because the DNS server 1 is closest to the geographic position corresponding to the first domain name resolution request.
S102, obtaining the line information corresponding to the IP address of the client.
In some embodiments, the line information is obtained by parsing an IP address of the client through GeoIP. For example, the parsing of the IP address of the client by GeoIP to obtain the line information may be performed by: the Local DNS server extracts the first domain name resolution request through a remote address field of an HTTP request header or network connection socket information in the first domain name resolution request to obtain an IP address of a client; the GeoIP (such as GeoIP provided by a MaxMind provider or GeoIP provided by an IP2Location provider) is installed on a Local DNS server, and corresponding configuration is carried out, so that the GeoIP file can be accessed by the Local DNS server, and proper reading permission is set; using GeoIP, matching the IP address of the client with GeoIP to obtain corresponding geographic location information, where country, province, city or region information may be obtained, for example, by querying the client with IP address 203.0.113.0, it may be obtained that it is located in Shenzhen city of guangdong province in china; and matching the analyzed geographical position information with predefined line information to obtain corresponding line information, wherein the line information can comprise the physical position of a server, a network node, a CDN distribution strategy and the like.
According to the embodiment of the disclosure, the line information is obtained by analyzing the IP address of the client through GeoIP, the first domain name request sent by the client can be guided to the Local DNS server with the geographic position closest to the client, delay is reduced, response speed is improved, faster and more stable service is provided, and access experience of a user is improved. By GeoIP analysis, potential malicious behaviors or unusual access modes can be identified, and by further checking or limiting the request related to the high-risk area, the security can be enhanced, the protection capability of the system is improved, the system is prevented from being failed, and the access accuracy of the client is further improved.
And S103, if the analysis results corresponding to the first domain name analysis request and the line information are not found in the configured line cache, sending a second domain name analysis request to a Authoritative DNS server so that the Authoritative DNS server can analyze the second domain name analysis request to obtain the CDN node IP address.
In some embodiments, the sending the second domain name resolution request to the Authoritative DNS server includes: acquiring a subnet address of the client; obtaining the second domain name resolution request according to the subnet address, the self IP address of the Local DNS server and the first domain name resolution request; the second domain name resolution request is sent to the Authoritative DNS server. For example, the subnet address of the client is obtained as ECS:123.90.28.100/24; ECS:123.90.28.100/24, the own IP address (such as 10.10.0.1) of the Local DNS server is inserted into the first domain name request to obtain a second domain name resolution request; the second domain name resolution request is sent to the Authoritative DNS server.
According to the embodiment of the disclosure, the Authoritative DNS server is a DNS server responsible for managing specific domain name areas, and can provide accurate and reliable domain name resolution service, obtain the CDN node IP address through Authoritative DNS server resolution, reduce delay of DNS query, provide faster and efficient domain name resolution experience, and perform distributed deployment through a plurality of Authoritative DNS servers, so that availability of the system can be improved, influence of single point failure is reduced, and accuracy of access to clients is further improved.
In some embodiments, the geographic location corresponding to the CDN node IP address is the same as the geographic location corresponding to the route information.
In some embodiments, the method further comprises: if the analysis results corresponding to the first domain name analysis request and the line information are found in the configured line cache, the analysis results are sent to the client so that the client can access CDN nodes corresponding to the analysis results.
S104, receiving the CDN node IP address, and sending the CDN node IP address to the client so that the client can access CDN nodes corresponding to the CDN node IP address.
In some embodiments, the method further comprises: after receiving the CDN node IP address, storing a domain name, line information, and the CDN node IP address corresponding to the first domain name resolution request in the line cache. For example, after receiving the CDN node IP address, the Local DNS stores the domain name and line information corresponding to the first domain name resolution request as a key, and stores the CDN node IP address as a value.
According to the embodiment of the disclosure, the domain name, the line information and the CDN node IP address corresponding to the domain name resolution request are stored in the line cache, so that when the other subsequent clients with the same line information send the same domain name resolution request, the CDN node IP address corresponding to the domain name resolution request can be directly found in the line cache, the access flow is reduced, and the access efficiency of the clients is improved.
According to the embodiment of the disclosure, a first domain name resolution request sent by a client is received; acquiring line information corresponding to the IP address of the client; if the analysis results corresponding to the first domain name analysis request and the line information are not found in the configured line cache, sending a second domain name analysis request to a Authoritative DNS server so that the Authoritative DNS server can analyze the second domain name analysis request to obtain an IP address of a CDN node; and receiving the CDN node IP address, and sending the CDN node IP address to the client so that the client can access CDN nodes corresponding to the CDN node IP address. The access of the client is realized by utilizing the line cache, the number of the DNS servers is not needed to be excessive, the access quantity is reduced, and the access efficiency of the client is improved; the accuracy of the access of the client is improved through the isolation of the line.
It should be noted that, for simplicity of description, the foregoing method embodiments are all described as a series of acts, but it should be understood by those skilled in the art that the present disclosure is not limited by the order of acts described, as some steps may be performed in other orders or concurrently in accordance with the present disclosure. Further, those skilled in the art will also appreciate that the embodiments described in the specification are all alternative embodiments, and that the acts and modules referred to are not necessarily required by the present disclosure.
The foregoing is a description of embodiments of the method, and the following further describes embodiments of the present disclosure through examples of apparatus.
Fig. 2 shows a block diagram of a line cache based access device 200 according to an embodiment of the present disclosure, the device 200 comprising:
a receiving module 201, configured to receive a first domain name resolution request sent by a client;
an obtaining module 202, configured to obtain line information corresponding to an IP address of the client;
a first sending module 203, configured to send a second domain name resolution request to a Authoritative DNS server if resolution results corresponding to the first domain name resolution request and the line information are not found in the configured line cache, so that the Authoritative DNS server can conveniently resolve the second domain name resolution request to obtain an IP address of a CDN node;
the second sending module 204 is configured to receive the CDN node IP address, and send the CDN node IP address to the client, so that the client accesses a CDN node corresponding to the CDN node IP address.
It will be clear to those skilled in the art that, for convenience and brevity of description, specific working procedures of the described modules may refer to corresponding procedures in the foregoing method embodiments, which are not described herein again.
In the technical scheme of the disclosure, the acquisition, storage, application and the like of the related user personal information all conform to the regulations of related laws and regulations, and the public sequence is not violated.
According to embodiments of the present disclosure, the present disclosure also provides an electronic device and a readable storage medium.
Fig. 3 shows a schematic block diagram of an electronic device 300 that may be used to implement embodiments of the present disclosure. Electronic devices are intended to represent various forms of digital computers, such as laptops, desktops, workstations, personal digital assistants, servers, blade servers, mainframes, and other appropriate computers. The electronic device may also represent various forms of mobile devices, such as personal digital processing, cellular telephones, smartphones, wearable devices, and other similar computing devices. The components shown herein, their connections and relationships, and their functions, are meant to be exemplary only, and are not meant to limit implementations of the disclosure described and/or claimed herein.
The electronic device 300 includes a computing unit 301 that can perform various appropriate actions and processes according to a computer program stored in a ROM302 or a computer program loaded from a storage unit 308 into a RAM 303. In the RAM303, various programs and data required for the operation of the electronic device 300 may also be stored. The computing unit 301, the ROM302, and the RAM303 are connected to each other by a bus 304. I/O interface 305 is also connected to bus 304.
Various components in the electronic device 300 are connected to the I/O interface 305, including: an input unit 306 such as a keyboard, a mouse, etc.; an output unit 307 such as various types of displays, speakers, and the like; a storage unit 308 such as a magnetic disk, an optical disk, or the like; and a communication unit 309 such as a network card, modem, wireless communication transceiver, etc. The communication unit 309 allows the electronic device 300 to exchange information/data with other devices through a computer network such as the internet and/or various telecommunication networks.
The computing unit 301 may be a variety of general and/or special purpose processing components having processing and computing capabilities. Some examples of computing unit 301 include, but are not limited to, a Central Processing Unit (CPU), a Graphics Processing Unit (GPU), various specialized Artificial Intelligence (AI) computing chips, various computing units running machine learning model algorithms, a Digital Signal Processor (DSP), and any suitable processor, controller, microcontroller, etc. The computing unit 301 performs the various methods and processes described above, such as a line cache based access method. For example, in some embodiments, the line cache based access method may be implemented as a computer software program tangibly embodied on a machine readable medium, such as storage unit 308. In some embodiments, part or all of the computer program may be loaded and/or installed onto the electronic device 300 via the ROM302 and/or the communication unit 309. When the computer program is loaded into RAM303 and executed by computing unit 301, one or more steps of the line cache based access method described above may be performed. Alternatively, in other embodiments, the computing unit 301 may be configured to perform the line cache based access method in any other suitable way (e.g. by means of firmware).
Various implementations of the systems and techniques described here above may be implemented in digital electronic circuitry, integrated circuitry, field Programmable Gate Arrays (FPGAs), application Specific Integrated Circuits (ASICs), application Specific Standard Products (ASSPs), systems-on-chips (SOCs), load programmable logic devices (CPLDs), computer hardware, firmware, software, and/or combinations thereof. These various embodiments may include: implemented in one or more computer programs, the one or more computer programs may be executed and/or interpreted on a programmable system including at least one programmable processor, which may be a special purpose or general-purpose programmable processor, that may receive data and instructions from, and transmit data and instructions to, a storage system, at least one input device, and at least one output device.
Program code for carrying out methods of the present disclosure may be written in any combination of one or more programming languages. These program code may be provided to a processor or controller of a general purpose computer, special purpose computer, or other programmable data processing apparatus such that the program code, when executed by the processor or controller, causes the functions/operations specified in the flowchart and/or block diagram to be implemented. The program code may execute entirely on the machine, partly on the machine, as a stand-alone software package, partly on the machine and partly on a remote machine or entirely on the remote machine or server.
In the context of this disclosure, a readable storage medium may be a tangible medium that can contain, or store a program for use by or in connection with an instruction execution system, apparatus, or device. The readable storage medium may be a machine-readable signal medium or a machine-readable storage medium. The readable storage medium may include, but is not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any suitable combination of the foregoing. More specific examples of a readable storage medium would include an electrical connection based on one or more wires, a portable computer diskette, a hard disk, a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.
To provide for interaction with a user, the systems and techniques described here can be implemented on a computer having: display means for displaying information to a user; and a keyboard and pointing device (e.g., a mouse or trackball) by which a user can provide input to the computer. Other kinds of devices may also be used to provide for interaction with a user; for example, feedback provided to the user may be any form of sensory feedback (e.g., visual feedback, auditory feedback, or tactile feedback); and input from the user may be received in any form, including acoustic input, speech input, or tactile input.
The systems and techniques described here can be implemented in a computing system that includes a background component (e.g., as a data server), or that includes a middleware component (e.g., an application server), or that includes a front-end component (e.g., a user computer having a graphical user interface or a web browser through which a user can interact with an implementation of the systems and techniques described here), or any combination of such background, middleware, or front-end components. The components of the system can be interconnected by any form or medium of digital data communication (e.g., a communication network). Examples of communication networks include: local Area Networks (LANs), wide Area Networks (WANs), and the internet.
The computer system may include a client and a server. The client and server are typically remote from each other and typically interact through a communication network. The relationship of client and server arises by virtue of computer programs running on the respective computers and having a client-server relationship to each other. The server may be a cloud server, a server of a distributed system, or a server incorporating a blockchain.
It should be appreciated that the various forms of flow described above may be used to reorder, add, or delete steps. For example, the steps recited in the present disclosure may be performed in parallel, sequentially, or in a different order, provided that the desired results of the technical solutions of the present disclosure are achieved, and are not limited herein.
The above detailed description should not be taken as limiting the scope of the present disclosure. It will be apparent to those skilled in the art that various modifications, combinations, sub-combinations and alternatives are possible, depending on design requirements and other factors. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present disclosure are intended to be included within the scope of the present disclosure.
Claims (10)
1. An access method based on line cache, applied to a Local DNS server, is characterized by comprising the following steps:
receiving a first domain name resolution request sent by a client;
acquiring line information corresponding to the IP address of the client;
if the analysis results corresponding to the first domain name analysis request and the line information are not found in the configured line cache, sending a second domain name analysis request to a Authoritative DNS server so that the Authoritative DNS server can analyze the second domain name analysis request to obtain an IP address of a CDN node;
and receiving the CDN node IP address, and sending the CDN node IP address to the client so that the client can access CDN nodes corresponding to the CDN node IP address.
2. The line cache based access method of claim 1, wherein the Local DNS server is selected by a Local DNS server intensive cluster through a four-layer switch according to a first domain name resolution request sent by the client.
3. The line cache based access method of claim 1, wherein the line information is obtained by parsing an IP address of the client through GeoIP.
4. The line cache based access method of claim 1, wherein the sending a second domain name resolution request to the Authoritative DNS server comprises:
acquiring a subnet address of the client;
obtaining the second domain name resolution request according to the subnet address, the self IP address of the Local DNS server and the first domain name resolution request;
the second domain name resolution request is sent to the Authoritative DNS server.
5. The line cache based access method of claim 1, wherein the geographic location corresponding to the CDN node IP address is the same as the geographic location corresponding to the line information.
6. The line cache based access method of claim 1, further comprising:
after receiving the CDN node IP address, storing a domain name, line information, and the CDN node IP address corresponding to the first domain name resolution request in the line cache.
7. The line cache based access method of claim 1, further comprising:
if the analysis results corresponding to the first domain name analysis request and the line information are found in the configured line cache, the analysis results are sent to the client so that the client can access CDN nodes corresponding to the analysis results.
8. An access device based on line cache, applied to a Local DNS server, comprising:
the receiving module is used for receiving a first domain name resolution request sent by the client;
the acquisition module is used for acquiring the line information corresponding to the IP address of the client;
the first sending module is configured to send a second domain name resolution request to a Authoritative DNS server if resolution results corresponding to the first domain name resolution request and the line information are not found in the configured line cache, so that the Authoritative DNS server can conveniently resolve the second domain name resolution request to obtain an IP address of a CDN node;
the second sending module is configured to receive the CDN node IP address, and send the CDN node IP address to the client, so that the client accesses a CDN node corresponding to the CDN node IP address.
9. An electronic device, comprising:
at least one processor;
a memory communicatively coupled to the at least one processor;
wherein the memory stores instructions executable by the at least one processor to enable the at least one processor to perform the method of any one of claims 1-7.
10. A non-transitory computer readable storage medium storing computer instructions for causing the computer to perform the method of any one of claims 1-7.
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| CN114205330A (en) * | 2021-11-09 | 2022-03-18 | 北京快乐茄信息技术有限公司 | Domain name resolution method, domain name resolution device, server, and storage medium |
| CN116405460A (en) * | 2023-05-09 | 2023-07-07 | 北京有竹居网络技术有限公司 | Domain name resolution method and device for content distribution network, electronic equipment and storage medium |
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