CN114726859A - Return request transmission method, electronic device and storage medium - Google Patents
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Abstract
The embodiment of the invention relates to the technical field of Internet and discloses a transmission method of a return source request, electronic equipment and a storage medium. In the invention, the transmission method of the back source request is applied to a content distribution network and comprises the following steps: the edge node receives the back-source request, and determines whether the intranet IP address is available or not when the intranet IP address exists in a source station which is requested to be accessed by the back-source request; if the request is available, the edge node forwards the back-source request to a back-source node bound with the intranet IP address; after receiving the source returning request, the source returning node establishes a special connection with the source station based on the first IP address and the intranet IP address, and sends the source returning request to the source station through the special connection. The transmission method of the source returning request can improve the transmission safety of the source returning request.
Description
Technical Field
The embodiment of the invention relates to the technical field of internet, in particular to a transmission method of a return source request, electronic equipment and a storage medium.
Background
With the development of internet technology, in order to facilitate access, an enterprise generally selects to deploy a source station in a public Network environment or on a cloud platform, and uses a Content Delivery Network (CDN) technology to realize accelerated transmission of data, so as to jointly realize Network security acceleration service. The CDN is an intelligent virtual network constructed on the basis of the existing network, and enables users to obtain required contents nearby by means of scheduling of a central platform and the technology of network acceleration by means of edge servers deployed in various places.
In the prior art, a CDN node can only access a source station deployed on a public network or a cloud platform through the public network, and when a back-source request is transmitted in the public network, at least the following problems exist:
firstly, potential safety hazards exist in a public network environment, and a source returning request can be intercepted, tampered and disguised, so that the transmission safety of the source returning request is low;
secondly, the public network is generally an operator network, the line quality and the state are not controllable, and the transmission stability is poor;
thirdly, enterprises need to pay additional public network bandwidth cost, which is high in cost.
Disclosure of Invention
The embodiments of the present application mainly aim to provide a transmission method, an electronic device, and a storage medium for a return request, which can improve the transmission security of the return request, implement transmission line control, and reduce enterprise cost.
In order to achieve the above object, an embodiment of the present application provides a method for transmitting a back-source request, which is applied to a content distribution network, and includes: the edge node receives the back-source request, and determines whether the intranet IP address is available or not when the intranet IP address exists in a source station which is requested to be accessed by the back-source request; if the request is available, the edge node forwards the back-source request to a back-source node bound with the intranet IP address; after receiving the source returning request, the source returning node establishes a special connection with the source station based on the first IP address and the intranet IP address, and sends the source returning request to the source station through the special connection.
In order to achieve the above object, an embodiment of the present application further provides an electronic device, including: at least one processor; and a memory communicatively coupled to the at least one processor; wherein the memory stores instructions executable by the at least one processor to cause the at least one processor to perform the method of transmission of a return request as described above.
In order to achieve the above object, an embodiment of the present application further provides a computer-readable storage medium, which stores a computer program, and the computer program, when executed by a processor, implements the method for transmitting a back-source request.
According to the transmission method of the source returning request, because the intranet IP address exists in the source station and when the intranet IP address is available, the edge node forwards the source returning request to the source returning node bound with the intranet IP address, the source returning node establishes special connection with the source station and sends the source returning request to the source station through the special connection, the source returning request can be transmitted to the source station through the intranet instead of being transmitted through a public network between a content distribution network and the source station, the situations that the source returning request is intercepted, tampered and the like caused by public network transmission can be reduced, the transmission safety of the source returning request is improved, and the problem in the background technology is solved.
In addition, determining whether an intranet IP address is available includes: and determining whether the intranet IP address is available or not based on the pre-stored address detection result. In the application, the availability of the intranet IP is detected by the back-source node bound with the intranet IP, so that the service state of the intranet IP can be obtained, and the request can be quickly forwarded through a public network when the intranet IP is unavailable; by pre-storing the address detection result, when the intranet IP address is required to be determined to be available, the intranet IP address is not required to be detected in real time, and whether the intranet IP address is available can be rapidly determined, so that the time required by forwarding the source request back to the edge node is reduced.
In addition, forwarding the back-source request to the back-source node bound with the intranet IP address comprises the following steps: selecting a path in a content distribution network; and forwarding the back-source request to a back-source node bound with the intranet IP address through a path. According to the method and the device, the path is selected in the content distribution network, the source returning request is forwarded to the source returning node bound with the IP address of the internal network through the path, the most appropriate forwarding path can be selected by the edge node, the source returning request can quickly reach the source returning node, and the transmission efficiency of the source returning request is improved.
In addition, the back-source node bound with the IP address of the intranet is deployed in the same intranet with the source station. In the application, the source returning node bound with the intranet IP address of the source station and the source station are deployed in the same intranet, so that the security of the special connection between the source returning node and the source station is higher, the transmission security of a source returning request is further guaranteed, and the routing consistency is ensured.
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One or more embodiments are illustrated by way of example in the accompanying drawings, which correspond to the figures in which like reference numerals refer to similar elements and which are not to scale unless otherwise specified.
Fig. 1 is a first flowchart illustrating a method for transmitting a back-source request according to an embodiment of the present invention;
fig. 2 is a schematic network topology diagram for implementing a transmission method of a back source request according to an embodiment of the present invention;
fig. 3 is a flowchart illustrating a transmission method of a back source request according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of an electronic device according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, embodiments of the present invention will be described in detail below with reference to the accompanying drawings. However, it will be appreciated by those of ordinary skill in the art that numerous technical details are set forth in order to provide a better understanding of the present application in various embodiments of the present invention. However, the technical solution claimed in the present application can be implemented without these technical details and various changes and modifications based on the following embodiments. The following embodiments are divided for convenience of description, and should not constitute any limitation to the specific implementation manner of the present invention, and the embodiments may be mutually incorporated and referred to without contradiction.
The embodiment of the invention relates to a transmission method of a back source request, which comprises the following steps as shown in figure 1:
102, if the request is available, the edge node forwards the back-source request to a back-source node bound with the intranet IP address;
and 103, after receiving the back-source request, the back-source node establishes a special connection with the source station based on the first IP address and the intranet IP address, and sends the back-source request to the source station through the special connection.
The method for transmitting a source return request of this embodiment is applied to a Content Delivery Network (CDN), where the CDN deploys a layer of intelligent virtual Network on the basis of the existing internet, where the layer of intelligent virtual Network is formed by deploying node servers at each location of the Network, and a CDN system can redirect a user request to a service node closest to the user in real time according to Network traffic, connection of each node, load conditions, a distance to the user, response time, and other comprehensive information. The method aims to enable the user to obtain the required content nearby, solve the network congestion condition and improve the response speed of the user for accessing the website. In the field of CDN, the back-to-source is a process in which a CDN node obtains data from a source station to return to a user, and is called as a back-to-source request, where the back-to-source request is a request sent by the CDN node to the source station in a back-to-source process to obtain data.
Because an enterprise generally selects to deploy a source station server in a public network environment or a cloud platform, a CDN node can only access a source station deployed in a public network or the cloud platform through the public network, when a back-source request has 1 in a public network transmission process, a public network environment has a potential safety hazard, and the back-source request may be eavesdropped, tampered, and disguised, resulting in lower transmission security of the back-source request; 2. secondly, the public network is generally an operator network, the line quality and the state are not controllable, and the transmission stability is poor; 3. enterprises need to pay additional public network bandwidth cost, and the cost is high.
In the application, an intranet IP address is configured for a source station in advance, a CDN node is deployed in the source station and a local area network to serve as a back source node bound by the source station, when an edge node receives a back source request which needs to be sent to the source station, the back source request can be preferentially transmitted through the intranet, the edge node can judge whether a source station pointed by the back source request has the intranet IP address or not, if the source station pointed by the back source request has the intranet IP address, the back source node which is deployed in the same local area network with the source station exists in the CDN network, further, the edge node can determine the availability of the intranet IP address, if the back source request is available, the back source request is forwarded to the back source node bound with the intranet IP address, a special connection is established between the back source node and the source station, the back source request is sent to the source station through the special connection, and therefore, the back source request can be transmitted to the source station through the intranet instead of a public network between a content distribution network and the source station, therefore, the situations that the source returning request is intercepted, tampered and the like caused by the transmission of the public network can be reduced, the security of the transmission of the source returning request is improved, and moreover, the enterprise does not need to pay the bandwidth cost of the public network because the source returning request is transmitted through the internal network, and the transmission cost can be saved.
The following describes in detail the implementation details of the transmission method of the back source request of the present embodiment, and the following is only provided for the convenience of understanding and is not necessary to implement the present embodiment.
In step 101, the edge node pre-stores a source station and its public network address that need to provide service, and if the source station also has an intranet IP address, the edge node also stores the intranet IP address and the corresponding source station and its public network address in association with each other. When a user sends a service request to a source station, the CDN scheduling service may select a corresponding edge node for the user according to the location information of the user, so as to provide a network service. After receiving the source returning request, the edge node analyzes the source returning request, determines a source station to be accessed by a user according to the information of the source returning request, and determines whether an intranet IP address exists in the source station according to a local record; if the source station has an intranet IP address, the edge node confirms whether the intranet IP address is available or not; if the source station does not have the intranet IP address, selecting an optimal source returning path in the CDN according to the public network address of the source station, and finally sending the source returning request to the source station through the public network.
In implementation, the edge node determines whether an intranet IP address is available based on a pre-stored address detection result. Each back-source node in the CDN network of this embodiment may periodically perform connectivity detection on the bound intranet IP addresses, determine whether the intranet IP address of the source station is available, and synchronize a detection result to an edge node in the CDN network. In one example, the back-source node uploads the probe result to the core server, and the core server synchronizes the probe result of the whole network to the edge node of the CDN network. And the edge node updates the state of the local stored intranet IP address through the received detection result. Therefore, the edge node can directly and quickly determine whether the intranet IP address is available according to the locally stored intranet IP address state, and the time required by the edge node for processing the return source request is reduced.
In step 102, if the intranet IP address of the source station is available, the edge node forwards the back-to-source request to the back-to-source node bound to the intranet IP address.
In an example, the back-source node bound to the intranet IP address of the source station refers to a CDN node deployed in the same local area network as the source station, and may be deployed in the same machine room as the source station and connected to each other through a network connection device, where there is an accessible intranet line between the back-source node and the source station.
When the edge node determines that the intranet IP address is available, the back-to-source node information bound with the intranet IP address can be determined firstly, and a suitable transmission line is selected from the CDN to forward the back-to-source request to the back-to-source node. In one implementation, the edge node may periodically calculate and generate an optimal path to each back-source node, store the optimal path, and directly forward the optimal path when forwarding the back-source request. The optimal path may be determined directly based on the line quality, such as the lowest time delay, the lowest packet loss rate, and the like, and it can be understood that, in order to meet the personalized requirements of the customers, the optimal path may also be selected in combination with the line state and the user requirements, such as low cost, high bandwidth, and the like. The specific selection criteria can be selected according to actual situations, and the application is not limited to this.
In this embodiment, a path is selected in the content distribution network, and the source returning request is forwarded to the source returning node bound to the intranet IP address through the path, so that the most appropriate forwarding path can be selected by the edge node, the source returning request can quickly reach the source returning node, and the transmission efficiency of the source returning request is improved.
In step 103, after receiving the back-to-source request, the back-to-source node establishes a dedicated connection with the source station based on the first IP address and the intranet IP address, and sends the back-to-source request to the source station through the dedicated connection.
After the establishment of the dedicated connection fails, the back-source node tries to establish the dedicated connection to the source station again until the establishment of the dedicated connection is successful. In a preferred implementation, after the establishment of the dedicated connection fails, the establishment of the dedicated connection is tried again to the source station within the range of the configuration retry connection establishment times until the establishment of the dedicated connection is successful, and if the retry connection establishment times are exceeded, the establishment of the dedicated connection failure can be determined. By setting the retry times, the probability of successful intranet connection establishment can be improved, so that the source returning request can be transmitted from the special connection as far as possible, and meanwhile, the source returning rate is prevented from being influenced by too many retry times. In the present application, the dedicated connection may be an intranet connection or a virtual network dedicated line connection. When the source returning node and the source station are positioned in the same local area network, the special connection can be intranet connection, the source returning node and the source station are connected through intranet dedicated lines, when the source returning node and the source station are respectively positioned in different local area networks, the special connection can be virtual network dedicated line connection, and the source returning node and the source station are connected through a virtual transmission network.
In one example, the back-source node bound to the intranet IP address is deployed in the same intranet (local area network) as the source station and connected through a network device. The feedback node may establish a dedicated connection with an intranet IP address of the source station through the first IP address, where the dedicated connection is an intranet connection, and the dedicated connection may be connected using, for example, a Transmission Control Protocol (TCP), or a User Datagram Protocol (UDP). After the private connection is successfully created, the back-source node may send a back-source request to the source station over the private connection.
In this embodiment, the source return node bound to the intranet IP address of the source station and the source station are deployed in the same intranet, so that the security of the dedicated connection between the source return node and the source station is higher, and the transmission security of the source return request is further ensured.
In one example, the back-source node receives response information returned by the source station through a dedicated connection between the back-source node and the back-source node after sending the back-source request to the source station through the dedicated connection.
In this embodiment, the source station returns response information to the back-to-source node through the dedicated connection between the source station and the back-to-source node, which can ensure the data security of the response information and the routing consistency.
In one example, if the private connection establishment fails, a public network connection is established with the source station's public network IP address based on the second IP address and the source request is sent back over the public network connection. That is, when configuring information, the source station needs to configure two IP addresses for it, one is an intranet IP address and one is a public IP address, and when configuring information, the return node also needs to configure two IP addresses for it, one is dedicated to establishing a connection with the intranet IP address of the source station, that is, the first IP address, and one is dedicated to establishing a connection with the public IP address of the source station, that is, the second IP address.
In this embodiment, when the dedicated connection is failed to be established, for example, the TCP connection is failed to be established, the back-source node cannot send the back-source request to the source station through the dedicated connection, and at this time, the back-source node may establish a public network connection with the public network address of the source station based on the second IP address, and still may send the back-source request to the source station, so that the back-source request can be guaranteed to be sent to the source station certainly, and the back-source request cannot obtain a response in time.
Furthermore, after sending the source returning request to the source station through the public network connection, the source returning node receives response information returned by the source station through the public network connection.
In this embodiment, the response information returned by the source station is received through the public network connection, and it is also ensured that the return source node can receive the response information of the source station even when the dedicated connection is failed to be established, and the request sent through the public network receives the response through the public network, and the request sent by the intranet receives the response through the intranet, so as to ensure the routing consistency.
Further, the second IP address and the first IP address belong to different address segments, and the source station may configure different routing rules for the address segments to which the second IP address and the first IP address belong in advance, where the different routing rules include: and sending the response information sent to the address field of the first IP address to the back source node through the special connection, and sending the response information sent to the address field of the second IP address to the back source node through the public network connection.
In this embodiment, since the second IP address and the first IP address belong to different address segments, and the source station configures different routing rules for the different address segments in advance, the source station can determine a sending path for sending the response information according to the difference of the IP addresses used by the source node after receiving the source return request, thereby ensuring routing consistency.
In an example, the method for transmitting the back-source request is implemented by a CDN network as shown in fig. 2, where a source station is deployed on an AWS (amazon Web services) cloud platform, and a CDN back-source node and the source station are deployed in the same machine room, so that the CDN back-source node and the source station are in the same intranet and are connected through a CDN switch (i.e., CDN SW) and a cloud platform switch (i.e., AWS SW).
The method comprises the steps that a user initiates a back-source request to a CDN edge node, the CDN edge node accelerates to a designated CDN back-source node according to channel configuration, namely, the back-source request is sent to the back-source node bound with an intranet IP address of a source station, and then the back-source request is sent to the source station through a special line (namely, intranet connection established between the back-source node and the source station) of an intranet of a machine room. The source station sends the response information back to the source node from the original route (i.e. intranet connection) according to dynamic route delivery, and then returns to the user through the transmission of the CDN. When the intranet special line fails or the intranet IP service port of the source station fails, namely the intranet connection cannot be successfully established, the CDN back-to-source node is switched to the source station public network IP address with zero delay, and public network transmission with the CDN back-to-source node is achieved.
In this embodiment, the transmission method of the source return request is implemented by the flow steps shown in fig. 3:
step (1) an intranet special line between a CDN server (a back source node) of the same machine room and a source station is opened, and step (2) is carried out;
step (2) appointing the CDN to return the source node to deploy the routes to the source station by adopting different local IPs (namely a first IP address and a second IP address), wherein the routes comprise a default route constructed by using the second IP address (such as IP1 in the figure) and the public network IP address of the source station and a detailed route constructed by using the first IP address (such as IP2 in the figure) and the internal network IP address of the source station, and the step (3) is carried out;
step (3) performing customer CDN acceleration channel configuration: the main source is an intranet IP/domain name, the standby source is a public network IP/domain name, designated CDN back-to-source nodes are configured at the same time, it is guaranteed that the CDN back-to-source nodes are designated by the same machine room as the source station, and the step (4) is carried out;
selecting a source: judging whether the intranet IP address detection of the source station is available (namely whether the intranet IP address is available), if so, performing the step (5); otherwise, performing the step (7);
step (5), routing: the edge node selects a designated CDN back-to-source node path to a designated back-to-source node;
step (6) whether the connection between the back source node and the intranet of the source station is normal or not is specified, if so, the back source request is sent to a CDN path of the intranet IP address of the source station and is finished; otherwise, performing step (8);
step (7), selecting a CDN path of a public network IP address of the source station to send a back source request, and then ending;
and (8) zero-delay switching to send a source returning request to the source station public network IP address, and then ending.
The steps of the above methods are divided for clarity, and the implementation may be combined into one step or split some steps, and the steps are divided into multiple steps, so long as the same logical relationship is included, which are all within the protection scope of the present patent; it is within the scope of the patent to add insignificant modifications to the algorithms or processes or to introduce insignificant design changes to the core design without changing the algorithms or processes.
Embodiments of the present invention also relate to an electronic device, as shown in fig. 4, including: at least one processor 401; a memory 402 communicatively coupled to the at least one processor; the memory 402 stores instructions executable by the at least one processor 401, and the instructions are executed by the at least one processor 401 to perform the transmission method of the back source request according to any of the embodiments described above.
Where the memory 402 and the processor 401 are coupled by a bus, which may include any number of interconnected buses and bridges that couple one or more of the various circuits of the processor 401 and the memory 402 together. The bus may also connect various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. A bus interface provides an interface between the bus and the transceiver. The transceiver may be one element or a plurality of elements, such as a plurality of receivers and transmitters, providing a means for communicating with various other apparatus over a transmission medium. The information processed by the processor 401 may be transmitted over a wireless medium through an antenna, which may receive the information and transmit the information to the processor 401.
The processor 401 is responsible for managing the bus and general processing and may provide various functions including timing, peripheral interfaces, voltage regulation, power management, and other control functions. And memory 402 may be used to store information used by the processor in performing operations.
Embodiments of the present invention relate to a computer-readable storage medium storing a computer program. The computer program realizes the above-described method embodiments when executed by a processor.
That is, as can be understood by those skilled in the art, all or part of the steps in the method according to the above embodiments may be implemented by a program instructing related hardware, where the program is stored in a storage medium and includes several instructions to enable a device (which may be a single chip, a chip, or the like) or a processor (processor) to execute all or part of the steps in the method according to the embodiments of the present application. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.
Claims (10)
1. A transmission method of a back source request is applied to a content distribution network and comprises the following steps:
the edge node receives a back-source request, and determines whether an intranet IP address is available or not when the intranet IP address exists in a source station which is accessed by the back-source request;
if the request is available, the edge node forwards the source returning request to a source returning node bound with the intranet IP address;
after receiving the source returning request, the source returning node establishes a special connection with the source station based on the first IP address and the intranet IP address, and sends the source returning request to the source station through the special connection.
2. The method for transmitting a request to return to source according to claim 1, wherein the determining whether the intranet IP address is available comprises:
and determining whether the intranet IP address is available or not based on a pre-stored address detection result.
3. The method for transmitting the back-source request according to claim 1, wherein the forwarding the back-source request to the back-source node bound to the intranet IP address includes:
selecting a path in the content distribution network;
and forwarding the source returning request to the source returning node bound with the intranet IP address through the path.
4. The method according to claim 1, wherein the source returning node bound to the IP address of the intranet is deployed in the same intranet as the source station.
5. The method for transmitting a back source request according to claim 1, further comprising:
and after the source returning request is sent to the source station by the source returning node through the special connection, the response information returned by the source station is received by the source returning node through the special connection.
6. The transmission method of the back-source request according to claim 1, wherein the back-source node, after receiving the back-source request, further comprises:
and if the private connection is failed to be established, establishing public network connection with the public network IP address of the source station based on a second IP address, and sending the source returning request through the public network connection.
7. The method for transmitting a backsource request according to claim 6, further comprising:
and after the source returning request is sent to the source station through the public network connection, the source returning node receives response information returned by the source station through the public network connection.
8. The transmission method of the request to return to source of claim 7, wherein the second IP address and the first IP address belong to different address segments respectively, and the source station configures different routing rules for the different address segments in advance;
the different routing rules include: sending the response information sent to the first IP address to the back source node through the special connection;
and sending the response information sent to the second IP address to the back source node through the public network connection.
9. An electronic device, comprising:
at least one processor; and the number of the first and second groups,
a memory communicatively coupled to the at least one processor; wherein the content of the first and second substances,
the memory stores instructions executable by the at least one processor to enable the at least one processor to perform a method of transmitting an echo request according to any of claims 1 to 8.
10. A computer-readable storage medium, in which a computer program is stored which, when being executed by a processor, carries out a method for transmitting a request back to a source according to any one of claims 1 to 8.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210216727.8A CN114726859A (en) | 2022-03-07 | 2022-03-07 | Return request transmission method, electronic device and storage medium |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210216727.8A CN114726859A (en) | 2022-03-07 | 2022-03-07 | Return request transmission method, electronic device and storage medium |
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