CN112565441B - Data communication method and electronic equipment - Google Patents
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- CN112565441B CN112565441B CN202011457124.4A CN202011457124A CN112565441B CN 112565441 B CN112565441 B CN 112565441B CN 202011457124 A CN202011457124 A CN 202011457124A CN 112565441 B CN112565441 B CN 112565441B
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- 238000000034 method Methods 0.000 title claims abstract description 30
- 230000006854 communication Effects 0.000 title claims abstract description 17
- 238000004891 communication Methods 0.000 title claims abstract description 16
- 230000004044 response Effects 0.000 claims abstract description 84
- 238000012545 processing Methods 0.000 claims abstract description 14
- 238000005538 encapsulation Methods 0.000 claims description 19
- 238000012423 maintenance Methods 0.000 claims description 9
- 238000012546 transfer Methods 0.000 claims description 9
- 230000001360 synchronised effect Effects 0.000 claims description 6
- 230000003993 interaction Effects 0.000 claims description 5
- 235000014510 cooky Nutrition 0.000 description 18
- 238000004806 packaging method and process Methods 0.000 description 8
- 230000008569 process Effects 0.000 description 7
- 238000003780 insertion Methods 0.000 description 4
- 230000037431 insertion Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
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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
- H04L67/14—Session management
- H04L67/146—Markers for unambiguous identification of a particular session, e.g. session cookie or URL-encoding
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/01—Protocols
- H04L67/10—Protocols in which an application is distributed across nodes in the network
- H04L67/1001—Protocols in which an application is distributed across nodes in the network for accessing one among a plurality of replicated servers
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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
- H04L67/14—Session management
- H04L67/143—Termination or inactivation of sessions, e.g. event-controlled end of session
- H04L67/145—Termination or inactivation of sessions, e.g. event-controlled end of session avoiding end of session, e.g. keep-alive, heartbeats, resumption message or wake-up for inactive or interrupted session
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Abstract
The invention provides a data communication method and electronic equipment, wherein the method comprises the following steps: receiving a first request message sent by a client under the condition that session connection is successfully established with the client; obtaining identification data for indicating to maintain a session connection with the client; under the condition that session connection is successfully established with the server, the request message is sent to the server; receiving a response message returned by the server; and processing the response message based on the identification data, and sending the processed response message to the client, wherein the processed response message contains the identification data, and the identification data can be automatically added into the request when the client initiates the request again.
Description
Technical Field
The embodiment of the invention relates to the field of communication, in particular to a data communication method and electronic equipment.
Background
When the load balancing device processes 7 layers of communication service in the communication process, 2 agents are commonly used, namely a full agent based on a kernel and a syn (synchronization sequence number (Synchronize Sequence Numbers)) agent without going through a kernel protocol stack, and the performance of the syn agent is far higher than that of the full agent. In proxy, it is often used to implement some functions by inserting a cookie (data stored on the user's local terminal) of http (hypertext transfer protocol) in the response data. The current cookie insertion of the http header is realized on the basis of the traditional kernel proxy, and the load balancing device based on the syn proxy does not have the function.
And in the proxy process, the cookie is inserted into the 7-layer communication service, which is an important technology, and can be used for realizing functions such as session maintenance and the like. In many current scenarios, both the performance of the syn agent and the cookie insertion technology are required to implement some functions, and it is important to add 7 layers of cookie technology to 7 layers of communication services on the load balancing device based on the syn agent.
Disclosure of Invention
The embodiment of the invention provides a data communication method, which comprises the following steps:
receiving a first request message sent by a client under the condition that session connection is successfully established with the client;
obtaining identification data for indicating to maintain a session connection with the client;
under the condition that session connection is successfully established with the server, the request message is sent to the server;
receiving a response message returned by the server;
and processing the response message based on the identification data, and sending the processed response message to the client, wherein the processed response message contains the identification data, and the identification data can be automatically added into the request when the client initiates the request again.
Preferably, the method further comprises:
receiving a second request message sent by the client, wherein the second request message carries the identification data;
and after the identity of the client is determined based on the identification data, session maintenance is carried out with the client and the server.
Preferably, the obtaining the identification data for indicating to maintain the session connection with the client includes:
and obtaining identification data for indicating to keep session connection with the client through the server.
Preferably, the method further comprises:
determining the maximum message segment length of matching based on data interaction performed when session connection is established with the client;
adjusting the length of a synchronous sequence number message sent to the server based on the length of the maximum message segment and the length of the identification data;
sending the synchronization sequence number message with the adjusted length to the server;
and receiving a response message returned by the server side, and completing establishment of session connection between the server side and the server side.
Preferably, the processing the response message based on the identification data includes:
analyzing the data of each packaging layer of the response message;
and correspondingly inserting the identification data into target positions in the packaging layer data respectively.
Preferably, the response message is a message transmitted based on a hypertext transfer protocol, and the inserting the identification data into the target positions in the respective encapsulation layer data respectively includes:
and respectively and correspondingly inserting the identification data into the hypertext transfer protocol header of each encapsulation layer data.
The invention also provides an electronic device, comprising:
the processor is used for receiving a first request message sent by the client to obtain identification data for indicating to keep session connection with the client under the condition that session connection is successfully established with the client, sending the request message to the server under the condition that session connection is successfully established with the server, receiving a response message returned by the server, processing the response message based on the identification data, and sending the processed response message to the client, wherein the processed response message contains the identification data.
Preferably, the processor is further configured to receive a second request packet sent by the client, where the second request packet carries the identification data, and perform session maintenance with the client and the server after determining the identity of the client based on the identification data.
Preferably, the processor obtains, through the server, identification data indicating that a session connection with the client is maintained.
Preferably, the processing the response message based on the identification data includes:
analyzing the data of each packaging layer of the response message;
and correspondingly inserting the identification data into target positions in the packaging layer data respectively.
Based on the disclosure of the above embodiment, it can be known that the embodiment of the present invention has the beneficial effects that the load balancing device establishes session connection with the client and the server, obtains the identification data, the transmitted request message, the received response message and the given identification data, so as to implement the processing of the response message, and inserts the identification data into the response message, so that the response message received by the client contains the identification data. The identification data can be automatically stored in the client and can be automatically added into the request when the client sends the request to the service point again, so that a request receiver can determine the identity of the client and the session between the client and the service point can be maintained.
Drawings
Fig. 1 is a flowchart of a data communication method in an embodiment of the present invention.
Fig. 2 is a flowchart illustrating an application of a data communication method according to another embodiment of the present invention.
Fig. 3 is a flow chart of a practical application of the data communication method in the embodiment of the invention.
Fig. 4 is a block diagram of an electronic device according to an embodiment of the present invention.
Detailed Description
Hereinafter, specific embodiments of the present invention will be described in detail with reference to the accompanying drawings, but not limiting the invention.
It should be understood that various modifications may be made to the embodiments disclosed herein. Therefore, the following description should not be taken as limiting, but merely as exemplification of the embodiments. Other modifications within the scope and spirit of this disclosure will occur to persons of ordinary skill in the art.
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the disclosure and, together with a general description of the disclosure given above and the detailed description of the embodiments given below, serve to explain the principles of the disclosure.
These and other characteristics of the invention will become apparent from the following description of a preferred form of embodiment, given as a non-limiting example, with reference to the accompanying drawings.
It is also to be understood that, although the invention has been described with reference to some specific examples, a person skilled in the art will certainly be able to achieve many other equivalent forms of the invention, having the characteristics as set forth in the claims and hence all coming within the field of protection defined thereby.
The above and other aspects, features and advantages of the present disclosure will become more apparent in light of the following detailed description when taken in conjunction with the accompanying drawings.
Specific embodiments of the present disclosure will be described hereinafter with reference to the accompanying drawings; however, it is to be understood that the disclosed embodiments are merely examples of the disclosure, which may be embodied in various forms. Well-known and/or repeated functions and constructions are not described in detail to avoid obscuring the disclosure in unnecessary or unnecessary detail. Therefore, specific structural and functional details disclosed herein are not intended to be limiting, but merely serve as a basis for the claims and as a representative basis for teaching one skilled in the art to variously employ the present disclosure in virtually any appropriately detailed structure.
The specification may use the word "in one embodiment," "in another embodiment," "in yet another embodiment," or "in other embodiments," which may each refer to one or more of the same or different embodiments in accordance with the disclosure.
Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
As shown in fig. 1, an embodiment of the present invention provides a data communication method, which includes:
receiving a first request message sent by a client under the condition that session connection is successfully established with the client;
obtaining identification data for indicating to maintain a session connection with the client;
under the condition that session connection is successfully established with the server, a request message is sent to the server;
receiving a response message returned by the server;
and processing the response message based on the identification data, and sending the processed response message to the client, wherein the processed response message contains the identification data, and the identification data can be automatically added into the request when the client initiates the request again.
Specifically, the method of the embodiment may be applied to a load balancing device (or other intermediate devices between the client and the server for assisting the communication between the client and the server), where the load balancing device uses a syn (synchronization sequence number (Synchronize Sequence Numbers)) agent, and other agents that cannot implement the session hold function due to the inability to insert the identification data indicating the session hold may be used. The following description will be made by taking a scheme execution body as a load balancing device as an example:
the client firstly sends a syn message to the load balancing device, then the load balancing device constructs an ack (Acknowledge character, confirm character) message containing the syn message and sends the ack message to the client, and then the client returns the ack message to the load balancing device, and at the moment, the client and the load balancing device carry out three-way handshake to establish session connection. Similarly, the load balancing device and the back-end server, namely the back-end server, can also realize three-way handshake by the method to establish session connection. In the case that the load balancing device establishes a session connection with at least the client, receiving a first request message sent by the client, and obtaining identification data for indicating that the session connection with the client is maintained, where the identification data is used to indicate the identity of the client, characterize that the session connection has been established between the client and the load balancing device, and require that the session connection be maintained, for example, the identification data is a cookie (data stored on the local terminal of the user). Then, the load balancing device may establish a session connection with the backend server, or pre-establish a session connection, and the specific time point of establishing the connection is not fixed, so long as the session connection is successfully established with the server. The load balancing device sends a first request message to the server based on the session connection, and receives a response message sent by the server based on the session connection as well. At this time, the load balancing device processes the response message based on the identification data, so as to add and insert the identification data into the response message, and then the processed response message can be sent to the client, and the target data can be automatically added into the request when the next time the client initiates the request to the server after the response message reaches the client, so that the load balancing device can determine the identity of the client based on the identification data, and session connection between the client and the server, between the client and the load balancing device, and between the load balancing device and the server is maintained.
Based on the disclosure of the above embodiment, it can be known that in the embodiment of the present invention, the load balancing device may respectively establish session connection with the client and the server to obtain the identification data, the request packet sent, the response packet received, and the identifier data, so as to implement processing of the response packet, and insert the identifier data into the response packet, so that the response packet received by the client includes the identifier data. The identification data can be automatically stored in the client and can be automatically added into the request when the client sends the request to the service point again, so that a request receiver can determine the identity of the client and the session between the client and the service point can be maintained.
Further, the method in this embodiment further includes:
receiving a second request message sent by a client, wherein the second request message carries identification data;
and after the identity of the client is determined based on the identification data, session maintenance is carried out with the client and the server.
For example, after the client receives the processed response message, the identification data in the response message may be automatically stored by the client and may be automatically added to the request when the client initiates a request to the server next time, that is, when the client sends a second request message, the identification data may be automatically added to the second request message and sent to the load balancing device, so that the load balancing device may determine the identity of the client based on the identification data, and maintain session connection between the client and the server, between the client and the load balancing device, and between the load balancing device and the server.
Further, obtaining identification data for indicating to maintain a session connection with a client in the present embodiment includes:
identification data indicating that a session connection with the client is maintained is obtained by the server.
For example, the server may generate the identification data and send the identification data to the load balancing device, or the load balancing device sends a request to obtain the identification data. Of course, the identification data may also be provided by a third party, in particular not uniquely.
Further, as shown in fig. 2, the method in this embodiment further includes:
determining the maximum message segment length of the matching based on the data interaction performed when the session connection is established with the client;
adjusting the length of a synchronous sequence number message sent to a server based on the length of the maximum message segment and the length of the identification data;
sending the synchronous sequence number message with the adjusted length to a server;
and receiving a response message returned by the server side, and completing establishment of session connection with the server side.
For example, when the load balancing device establishes session connection with the client, for example, in the process that the load balancing device performs three-way handshake with the client, the maximum message segment length is abbreviated as an MSS value, request messages and response messages are sent to each other, and based on the interactive messages, the load balancing device can determine the MSS value carried by the request message sent by the client. In order to simulate the establishment of session connection between the client and the server and ensure that the response message returned by the server can be successfully received by the client, the load balancing device calculates the MSS value of the message sent to the client by the load balancing device based on the MSS value and the length of the identification data, specifically calculates the MSS value on the right side of the message sent to the server, and specifically obtains the length of MSS value-flag data on the left side of the message. Then, the load balancing device constructs a message, such as a syn message, for sending to the server according to the calculated MSS value, and then receives the syn+ack message fed back by the server, where the load balancing device changes to complete the operation of establishing a session connection with the server, that is, where the load balancing device may simulate the client to send the first request message to the server based on the session connection. When sending the first request message, as shown in fig. 3, specifically, the first request message (such as response message) and the received ack message are sent to the server together.
Further, when the server side responds and returns a response message to the load balancing device, the load balancing device processes the response message based on the identification data, and the process specifically comprises the following steps:
analyzing the data of each packaging layer of the response message;
and respectively and correspondingly inserting the identification data into the target positions in the packaging layer data.
Specifically, the response data in the response message may be encapsulated in multiple layers based on the communication protocol, and typically has 7 encapsulation layers, where each encapsulation layer has a corresponding session connection, and in order to be able to maintain the session connection of each encapsulation layer, the load balancing device needs to parse each encapsulation layer data of the response message, and insert the identification data into a target location in each encapsulation layer data respectively.
For example, when the response message in this embodiment is a message transmitted based on the hypertext transfer protocol, that is, a message transmitted based on the http protocol, and the identification data is a cookie (only examples and not unique here), and the load balancing device inserts the identification data into the target positions in the respective encapsulation layer data correspondingly, the method includes:
the identification data are respectively inserted into the hypertext transfer protocol header of each encapsulation layer data correspondingly.
Specifically, a cookie is inserted into an http header of 7 layers of http data in a response message for the load balancing device, then the load balancing device can repackage the processed response message and send the response message to the client, so that the client can automatically carry the cookie carried when receiving the response message returned last time when sending the second request message again, after receiving the second request message, the load balancing device determines the cookie by analyzing the http message Wen Bianke, finally session maintenance is realized based on the cookie, and the second request message is directly sent to the server.
In a specific application, as shown in fig. 3, for example, the device includes a load balancing device AD, a client a, and a server B, where cookie insertion data is configured on the device AD, and the cookie insertion data is specifically obtained by the server B. After a client A initiates a connection request to equipment AD and performs three-way handshake, the AD records an MSS value interacted with the A; next, the device AD calculates the MSS value on the right side (left side MSS value-cookie length) of the request connection message to be sent to the server, and then constructs a request connection message based on the newly calculated MSS value, sends the request connection message to B, and performs a three-way handshake with B to establish a session connection. And after receiving the response message returned by the B, the AD analyzes seven-layer encapsulation data of the response message, inserts cookies into http heads of all encapsulation layers, and returns the processed response message to the A. The cookie which is received by the A is automatically stored into the A because the cookie which is inserted by the AD is carried in the response message, the cookie which is received by the A at the last time is carried when the A initiates the request again, and the AD performs session maintenance according to the cookie in the message of the request.
As shown in fig. 4, another embodiment of the present invention also provides an electronic device, including:
the processor is used for receiving a first request message sent by the client to obtain identification data for indicating to keep the session connection with the client under the condition that the session connection is successfully established with the client, sending the request message to the server under the condition that the session connection is successfully established with the server, receiving a response message returned by the server, processing the response message based on the identification data, and sending the processed response message to the client, wherein the processed response message contains the identification data.
Based on the disclosure of the above embodiment, it can be known that the embodiment of the present invention has the beneficial effects that the load balancing device establishes session connection with the client and the server, obtains the identification data, the transmitted request message, the received response message and the given identification data, so as to implement the processing of the response message, and inserts the identification data into the response message, so that the response message received by the client contains the identification data. The identification data can be automatically stored in the client and can be automatically added into the request when the client sends the request to the service point again, so that a request receiver can determine the identity of the client and the session between the client and the service point can be maintained.
As a preferred embodiment, the processor is further configured to receive a second request packet sent by the client, where the second request packet carries identification data, and perform session maintenance with the client and the server after determining the identity of the client based on the identification data.
As a preferred embodiment, the processor obtains, via the server, identification data indicating that a session connection with the client is maintained.
As a preferred embodiment, the processor is further configured to:
determining the maximum message segment length of the matching based on the data interaction performed when the session connection is established with the client;
adjusting the length of a synchronous sequence number message sent to a server based on the length of the maximum message segment and the length of the identification data;
sending the synchronous sequence number message with the adjusted length to a server;
and receiving a response message returned by the server side, and completing establishment of session connection with the server side.
As a preferred embodiment, when the processor processes the response message based on the identification data, the method includes:
analyzing the data of each packaging layer of the response message;
and respectively and correspondingly inserting the identification data into the target positions in the packaging layer data.
As a preferred embodiment, the response message in this embodiment is a message transmitted based on a hypertext transfer protocol, and the processor inserts the identification data into the target positions in the respective encapsulation layer data correspondingly, including:
the identification data are respectively inserted into the hypertext transfer protocol header of each encapsulation layer data correspondingly.
The above embodiments are only exemplary embodiments of the present invention and are not intended to limit the present invention, the scope of which is defined by the claims. Various modifications and equivalent arrangements of this invention will occur to those skilled in the art, and are intended to be within the spirit and scope of the invention.
Claims (7)
1. A method of data communication, the method comprising:
receiving a first request message sent by a client under the condition that session connection is successfully established with the client;
obtaining identification data for indicating to maintain a session connection with the client;
under the condition that session connection is successfully established with a server, the first request message is sent to the server;
receiving a response message returned by the server;
processing the response message based on the identification data, and sending the processed response message to the client, wherein the processed response message contains the identification data, and the identification data can be automatically added into a request when the client initiates the request again; wherein,,
the processing the response message based on the identification data comprises the following steps:
analyzing seven encapsulation layer data of the response message;
the identification data are respectively inserted into target positions in the seven encapsulation layer data correspondingly;
determining the maximum message segment length of matching based on data interaction performed when session connection is established with the client;
adjusting the length of a synchronous sequence number message sent to the server based on the length of the maximum message segment and the length of the identification data;
sending the synchronization sequence number message with the adjusted length to the server;
and receiving a response message returned by the server side, and completing establishment of session connection between the server side and the server side.
2. The method of claim 1, further comprising:
receiving a second request message sent by the client, wherein the second request message carries the identification data;
and after the identity of the client is determined based on the identification data, session maintenance is carried out with the client and the server.
3. The method of claim 1, wherein the obtaining identification data indicating that a session connection with the client is maintained comprises:
and obtaining identification data for indicating to keep session connection with the client through the server.
4. The method of claim 1, wherein the response message is a message transmitted based on a hypertext transfer protocol, and the inserting the identification data into the respective encapsulation layer data at the target location respectively includes:
and respectively and correspondingly inserting the identification data into the hypertext transfer protocol header of each encapsulation layer data.
5. An electronic device, comprising:
the processor is used for receiving a first request message sent by the client to obtain identification data for indicating to keep the session connection with the client under the condition that the session connection is successfully established with the client, sending the request message to the server under the condition that the session connection is successfully established with the server, receiving a response message returned by the server, processing the response message based on the identification data, and sending the processed response message to the client, wherein the processed response message contains the identification data;
the processing the response message based on the identification data comprises the following steps:
analyzing seven encapsulation layer data of the response message;
the identification data are respectively inserted into target positions in the seven encapsulation layer data correspondingly;
the processor is further configured to determine a maximum packet length that is matched based on data interaction performed when session connection is established with the client, adjust a length of a synchronization sequence number packet that is used for being sent to the server based on the maximum packet length and the length of the identification data, send the synchronization sequence number packet with the adjusted length to the server, receive a response packet returned by the server, and complete establishment of session connection with the server.
6. The electronic device of claim 5, wherein the processor is further configured to receive a second request packet sent by the client, the second request packet carrying the identification data, and to perform session maintenance with the client and a server after determining the identity of the client based on the identification data.
7. The electronic device of claim 5, wherein the processor obtains, via the server, identification data indicating to maintain a session connection with the client.
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| CN113422754A (en) * | 2021-04-01 | 2021-09-21 | 阿里巴巴新加坡控股有限公司 | Data processing method and device, electronic equipment and computer readable storage medium |
| CN116711448A (en) * | 2022-01-04 | 2023-09-05 | 华为技术有限公司 | Communication method, device and system |
| CN114827239A (en) * | 2022-05-31 | 2022-07-29 | 杭州迪普科技股份有限公司 | Bidirectional session holding method and device based on 8583 protocol |
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| CN103457869A (en) * | 2013-08-28 | 2013-12-18 | 北京星网锐捷网络技术有限公司 | Conversation maintaining method and device |
| CN107995304A (en) * | 2017-12-13 | 2018-05-04 | 杭州迪普科技股份有限公司 | A kind of session keeping method and device based on cookie |
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| US20150142982A1 (en) * | 2013-11-15 | 2015-05-21 | Microsoft Corporation | Preservation of connection session |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101340371A (en) * | 2008-08-12 | 2009-01-07 | 杭州华三通信技术有限公司 | Session keeping method and load balance apparatus |
| CN103457869A (en) * | 2013-08-28 | 2013-12-18 | 北京星网锐捷网络技术有限公司 | Conversation maintaining method and device |
| CN107995304A (en) * | 2017-12-13 | 2018-05-04 | 杭州迪普科技股份有限公司 | A kind of session keeping method and device based on cookie |
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