CN107529229B - Data transmission method, device and system - Google Patents
Data transmission method, device and system Download PDFInfo
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- CN107529229B CN107529229B CN201610451648.XA CN201610451648A CN107529229B CN 107529229 B CN107529229 B CN 107529229B CN 201610451648 A CN201610451648 A CN 201610451648A CN 107529229 B CN107529229 B CN 107529229B
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- H04—ELECTRIC COMMUNICATION TECHNIQUE
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- H04W76/10—Connection setup
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Abstract
After a short connection is established with a client according to the data transmission method provided by the invention, data is acquired through a long connection established with a second relay server; receiving the client disconnection request, and sending a disconnection notification to the second relay server according to the disconnection request; before the data acquisition request of the client is received, caching the data request initiated by the client in a time interval before the second relay server is successfully connected with the server after the client is disconnected, and forwarding the cached data request to the second relay server after a notification message that the second relay server is successfully connected with the server is received. The problems that the media service needs to initiate a connection request for multiple times to obtain specific information, and the short connection causes low utilization efficiency of server bandwidth and the client cannot respond to control information in time because the relay server frequently processes the connection request are solved.
Description
Technical Field
The present invention relates to the field of communications and computers, and in particular, to a method, apparatus, and system for data transmission.
Background
With the popularization of networks, the application of a HyperText Transfer Protocol (HTTP) Protocol is more and more widespread, the HTTP Protocol belongs to an application layer in a network hierarchy, and data Transmission of the HTTP Protocol needs to be performed after a connection is established by using a Transmission Control Protocol (TCP). The connections are divided into long and short connections, and in HTTP/1.0, the short connection is used by default. From HTTP/1.1, a long connection is used by default to maintain connection characteristics. The advantages and disadvantages of long connection and short connection are obvious, the long connection has the advantages that frequent TCP establishment and closing operations are omitted, the disadvantages that detection periods of survival functions are long, the utilization efficiency of server resources is reduced rapidly along with the increase of connections without data transmission of clients, and if malicious connections are met, the survival functions cannot be used normally, so that the connection data needs to be controlled, and the method is suitable for long connections for clients who request resources frequently. The short connection has the advantages that the requirement on the server is low, the existing connections have data transmission, and no additional control means is needed. The disadvantage is that client requests are frequent and signaling traffic occupies valuable bandwidth of the server. The difference between the two causes problems in practical applications, for example, in HTTP media service networking that relies on a relay server to establish a connection, since the media service needs to initiate a connection request many times to obtain specific information, a long connection cannot support such a scenario, and a short connection implementation is further limited by the ability of the relay server to establish and delete a large number of connections frequently and the efficiency of the client to respond to control information.
Aiming at the problems that in the prior art, a media service needs to initiate a connection request for multiple times to obtain specific information, a long connection cannot directly support such scenes, and a short connection causes low utilization efficiency of a server bandwidth and a client cannot respond to control information in time because a relay server frequently processes connection establishment and deletion requests, an effective solution is not provided at present.
Disclosure of Invention
The invention provides a data transmission method, a device and a system, which at least solve the problems that a media service needs to initiate a connection request for multiple times to obtain specific information, a long connection cannot directly support the scenes, a short connection causes low utilization efficiency of a server bandwidth because a relay server frequently processes the connection request for establishment and deletion, and a client cannot respond to control information in time.
According to an aspect of the present invention, there is provided a data transmission system including at least first and second relay servers, a server, and a client, the first relay server being located on a client side, the client being in short connection with the first relay server, wherein long-connection communication is established between the first relay server and the second relay server, the second relay server being located on the server side, the second relay server being in short connection with the server; the client is used for acquiring data from the server through the connection between the first relay server and the connection between the second relay server and the server; the second relay server is used for synchronously disconnecting the connection between the client and the first relay server when the connection between the client and the first relay server is disconnected before the first relay server receives the request for completing data acquisition, automatically reconnecting the client after the connection between the client and the first relay server is disconnected, and sending a notification message of successful connection to the first relay server; and the first relay server is used for forwarding the stored client data request after receiving the notification message, wherein the data request is initiated within a time interval when the server is successfully connected with the second relay server after the client is disconnected from the first relay server.
Further, the system also comprises a third relay server, wherein the third relay server is positioned in a public network, the first relay server and the second relay server establish long connection through the third relay server, and the first relay server and the second relay server are positioned in a private network.
Further, the system further includes a control server for storing address information and port numbers of the first relay server, the second relay server, and the third relay server.
According to an aspect of the present invention, there is provided a data transmission method, wherein after establishing a short connection with a client, data is acquired through a long connection established with a second relay server; receiving the client disconnection request, and sending a disconnection notification to the second relay server according to the disconnection request; before the data acquisition request of the client is received, caching the data request initiated by the client in a time interval before the second relay server is successfully connected with the server after the client is disconnected, and forwarding the cached data request to the second relay server after a notification message that the second relay server is successfully connected with the server is received.
Further, after the client is disconnected, discarding data except the connection state information of the second relay server and the server.
Further, before establishing a connection with the client and/or before establishing a long connection with the second relay server, address information and a port number of the first relay server stored in the control server are acquired, and a short connection is established with the second relay server according to the address information and the port number.
According to an aspect of the present invention, a data transmission method is further provided, where a short connection is established with a server after a service request forwarded by a first relay server is received through a long connection established with the first relay server, and a service request is sent to the server, where the service request is used for a client to obtain data from the server; before receiving the request for completing data acquisition, after receiving the notification of disconnection between the first relay server and the client, disconnecting the server, connecting the server and sending a notification message of successful connection to the first relay server.
Further, the connecting with the server and sending the notification message of successful connection to the first relay server further includes: and starting a timer to time after the server is disconnected, and connecting the server after the time counting is finished.
According to an aspect of the present invention, there is also provided a data transmission apparatus, wherein the receiving module: the short connection is established with the client, and the data is acquired through the long connection established with the second relay server; a notification module: the server is used for receiving the client disconnection request and sending a disconnection notification to the second relay server according to the disconnection request; a cache module: before the client finishes the data acquisition request, after the client is disconnected from the cache, the data request initiated by the client in a time interval before the second relay server is successfully connected with the server is received, and until a notification message that the second relay server is successfully connected with the server is received, a forwarding module: for forwarding the cached data request to the second relay server.
According to an aspect of the present invention, there is also provided a data transmission apparatus, including a receiving module: the server is used for receiving the service request forwarded by the first relay server through the long connection established with the first relay server, establishing short connection with the server, and sending the service request to the server to acquire data; an interrupt module: before receiving a request for completing data acquisition, after receiving a notification of disconnection between the first relay server and the client, disconnecting the server and reconnecting the server; a notification module: and the notification message is used for sending the successful connection to the first relay server.
The invention uses two relay servers, uses long connection between the first relay server and the second relay server, uses short connection between the first relay server and the client, and uses short connection between the second relay server and the server, thereby solving the problems that in the prior art, the media service needs to initiate connection requests for many times to obtain specific information, the long connection can not directly support the scenes, the short connection can cause low service efficiency of the server bandwidth and the client can not respond to control information in time because the relay server frequently processes the connection requests to establish and delete, the service efficiency of the server is obviously improved, and the satisfaction of the user is improved.
Drawings
FIG. 1 is a data transmission system traffic flow diagram according to an embodiment of the present invention;
FIG. 2 is a block diagram of a data transmission system according to an embodiment of the present invention;
FIG. 3 is a block diagram of a data transmission system architecture II according to an embodiment of the present invention;
FIG. 4 is a first flowchart of a data transmission method according to an embodiment of the present invention;
FIG. 5 is a flow chart of a data transmission method according to an embodiment of the present invention;
FIG. 6 is a diagram illustrating a first data transfer server according to an embodiment of the present invention;
FIG. 7 is a diagram of a second data transfer server according to an embodiment of the present invention;
Detailed Description
The invention will be described in detail hereinafter with reference to the accompanying drawings in conjunction with embodiments. It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.
It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order.
Fig. 1 is a service flow diagram of a data transmission system according to an embodiment of the present invention, and as shown in fig. 1, the data transmission system includes at least a first relay server and a second relay server, a server, and a client, where the first relay server is located at a client side, and the client is in short connection with the first relay server, where long connection communication is established between the first relay server and the second relay server, the second relay server is located at the server side, and the second relay server is in short connection with the server; the client is used for acquiring data from the server through the connection between the first relay server and the connection between the second relay server and the server; the second relay server is used for synchronously disconnecting the connection between the client and the first relay server when the connection between the client and the first relay server is disconnected before the first relay server receives the request for completing data acquisition, automatically reconnecting the client after the connection between the client and the first relay server is disconnected, and sending a notification message of successful connection to the first relay server; and the first relay server is used for forwarding the stored client data request after receiving the notification message, wherein the data request is initiated within a time interval when the server is successfully connected with the second relay server after the client is disconnected from the first relay server.
Further, fig. 2 is a block diagram of a data transmission system architecture according to an embodiment of the present invention, and as shown in fig. 2, the system further includes a third relay server, where the third relay server is located in a public network, and the first relay server and the second relay server establish a long connection through the third relay server, where the first relay server and the second relay server are located in a private network.
Further, fig. 3 is a block diagram of a data transmission system architecture according to an embodiment of the present invention, and as shown in fig. 3, the system further includes a control server for storing address information and port numbers of the first relay server, the second relay server, and the third relay server.
According to an aspect of the present invention, there is further provided a data transmission method, and fig. 4 is a flowchart of a data transmission method according to an embodiment of the present invention, as shown in fig. 4, the method includes:
s402: after establishing short connection with the client, acquiring data through long connection established with a second relay server; receiving the client disconnection request,
s404: before receiving the data acquisition request completed by the client, sending a disconnection notification to the second relay server according to the disconnection request;
s406: caching a data request initiated by the client in a time interval before the second relay server is successfully connected with the server after the client is disconnected, until receiving a notification message that the second relay server is successfully connected with the server,
s408: forwarding the cached data request to the second relay server.
Further, the data transmission method further includes discarding data except the connection state information of the second relay server and the server after the client is disconnected.
According to an aspect of the present invention, there is further provided a data transmission method, and fig. 5 is a flowchart of a data transmission method according to an embodiment of the present invention, as shown in fig. 5,
s502: after receiving a service request forwarded by a first relay server through a long connection established with the first relay server, establishing a short connection with the server, and sending the service request to the server to acquire data;
s504: before receiving a request for completing data acquisition, after receiving a notification that the first relay server is disconnected from the client, disconnecting the first relay server from the server, and reconnecting the first relay server with the server;
s506: and sends a notification message of successful connection to the first relay server.
Further, before receiving the request for completing data acquisition, after receiving the notification that the first relay server is disconnected from the client, the data transmission method disconnects from the server, and sends a notification message of successful connection to the first relay server.
Further, the data transmission method further includes disconnecting the connection with the server after receiving a disconnection notification of the first relay server from the client before receiving the request for completing data acquisition, and sending a connection success notification message to the first relay server after disconnecting the connection with the server.
Further, the data transmission method further includes, before the client establishes a connection and/or before the client establishes a long connection with the first relay server, acquiring address information and a port number of the first relay server stored in the control server, and establishing a short connection with the first relay server according to the address information and the port number.
According to an aspect of the present invention, there is further provided a data transmission server, fig. 6 is a schematic diagram of a data transmission server according to an embodiment of the present invention, as shown in fig. 6, the data transmission server includes: a receiving module: the short connection is established with the client, and the data is acquired through the long connection established with the second relay server; a notification module: the server is used for receiving the client disconnection request and sending a disconnection notification to the second relay server according to the disconnection request; a cache module: before the client finishes the data acquisition request, after the client is disconnected from the cache, the data request initiated by the client in a time interval before the second relay server is successfully connected with the server is received, and until a notification message that the second relay server is successfully connected with the server is received, a forwarding module: for forwarding the cached data request to the second relay server.
According to an aspect of the present invention, there is further provided the data transmission server, fig. 7 is a schematic diagram of a data transmission server according to an embodiment of the present invention, as shown in fig. 7, the data transmission server includes; a receiving module: the server is used for receiving the service request forwarded by the first relay server through the long connection established with the first relay server, establishing short connection with the server, and sending the service request to the server to acquire data; an interrupt module: before receiving a request for completing data acquisition, after receiving a notification of disconnection between the first relay server and the client, disconnecting the server from the server, and connecting the server with the first relay server; a notification module: and the notification message is used for sending the successful connection to the first relay server.
The present invention is further explained with another specific embodiment of a data transmission system, which has three relay servers, wherein a third relay server is located in a public network, a first relay server and a second relay server are respectively located in a private network, the first relay server establishes a long connection with the second relay server through the third relay server, and an HTTP server and a client perform normal multiple connection/disconnection as required, and the service flow is as follows:
s802: after the client requests the service from the control server, the control server informs the client and the server of the service to be developed;
s804: the first relay server and the second relay server are connected to a third relay server, and a keep-alive flow between the first relay server and the second relay server is started;
s806: the second relay server is connected to the HTTP server;
s808: a client initiates a service request to a first relay server, and data can reach an HTTP server after being forwarded by each relay;
s810: and the HTTP server responds to the request, and the data is returned in the original path, so that the communication between the client and the HTTP server is realized.
S812: according to the business requirements, the client may actively disconnect in the business process. The first relay server transmits a disconnection notification message to the second relay server.
S814: and the first relay server enters a message checking state and filters all connection success/failure messages sent by non-first relay servers.
S816: and the second relay server receives the disconnection notification message sent by the first relay server, actively disconnects the HTTP server, then requests to connect the HTTP server again, and then sends the connection result to the first relay server.
In the operation process from S812 to S816, the ue actively connects to the first relay server and initiates an HTTP request, and these data are cached by the first relay server.
S818: and after receiving the connection success message sent by the second relay server, the first relay server forwards the cached data to the HTTP server.
S820: the HTTP server responds to the request. Continuous data transmission between the client and the server.
S822: and when the service is finished, the client is actively disconnected, and a service finishing request is sent to the first relay server, and the first relay server transfers the service finishing request.
S824: the first relay server disconnects the long connection with the third relay server, and the second relay server disconnects the connection with the third relay server. And the HTTP server finishes the service, disconnects the connection with the second relay server and destroys the link.
In the above-described flow, for example, the notification message of the connection interruption, which is transmitted from the first relay server to the second relay server, does not reach the second relay server for various reasons, or the success/failure message transmitted from the second relay server cannot reach the first relay server. And setting a check state timer limit time limit in the message check state of the first relay server, actively ending the service if a connection success/failure message is not received within a specified time, and disconnecting the connection with the third relay server.
In step S818, the number of the messages cached by the first relay server is limited, and the size of the cache area is set according to the size of the memory of the actual device and the number of the messages that may be sent within the set time limit of the check status timer. If the buffer area is full, the last incoming message is preferentially discarded, the discarding upper limit number is set, if the upper limit is reached, the buffer is emptied, the service is actively ended, and the connection with the third relay server is disconnected.
It will be apparent to those skilled in the art that the modules or steps of the present invention described above may be implemented by a general purpose computing device, they may be centralized on a single computing device or distributed across a network of multiple computing devices, and alternatively, they may be implemented by program code executable by a computing device, such that they may be stored in a storage device and executed by a computing device, and in some cases, the steps shown or described may be performed in an order different than that described herein, or they may be separately fabricated into individual integrated circuit modules, or multiple ones of them may be fabricated into a single integrated circuit module. Thus, the present invention is not limited to any specific combination of hardware and software.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A data transmission system comprising at least first and second relay servers, a server, and a client, characterized in that:
the first relay server is positioned at a client side, and the client side is in short connection with the first relay server, wherein long connection communication is established between the first relay server and the second relay server, the second relay server is positioned at the server side, and the second relay server is in short connection with the server;
the client is used for acquiring data from the server through the connection between the first relay server and the connection between the second relay server and the server;
the second relay server is used for synchronously disconnecting the connection between the client and the first relay server when the connection between the client and the first relay server is disconnected before the first relay server receives the request for completing data acquisition, automatically reconnecting the client after the connection between the client and the first relay server is disconnected, and sending a notification message of successful connection to the first relay server;
and the first relay server is used for forwarding the stored client data request after receiving the notification message, wherein the data request is initiated within a time interval when the server is successfully connected with the second relay server after the client is disconnected from the first relay server.
2. The data transmission system of claim 1, wherein:
the system also comprises a third relay server, wherein the third relay server is positioned in the public network, the first relay server and the second relay server establish long connection through the third relay server, and the first relay server and the second relay server are positioned in the private network.
3. The data transmission system of claim 2, wherein:
the system further comprises a control server for storing address information and port numbers of the first relay server, the second relay server and the third relay server.
4. A method of data transmission, the method comprising:
after the first relay server establishes short connection with the client, data is acquired through long connection established with the second relay server;
receiving the client disconnection request, and sending a disconnection notification to the second relay server according to the disconnection request;
before the data acquisition request of the client is received, caching the data request initiated by the client in a time interval before the second relay server is successfully connected with the server after the client is disconnected, and forwarding the cached data request to the second relay server after a notification message that the second relay server is successfully connected with the server is received.
5. The data transmission method according to claim 4, characterized in that:
and after the client is disconnected, discarding the data except the connection state information of the second relay server and the server.
6. The data transmission method according to claim 4, characterized in that:
before the server establishes connection with the client and/or establishes long connection with the second relay server, the address information and the port number of the first relay server stored in the control server are obtained, and short connection is established with the second relay server according to the address information and the port number.
7. A data transmission method, characterized by;
the server receives a service request forwarded by a first relay server through a long connection established with the first relay server, establishes a short connection with the server and sends the service request to the server, wherein the service request is used for a client to acquire data from the server;
before receiving the request for completing data acquisition, after receiving the notification of disconnection between the first relay server and the client, disconnecting the server, connecting the server and sending a notification message of successful connection to the first relay server.
8. The data transmission method according to claim 7, characterized in that:
the connecting with the server and sending the notification message of successful connection to the first relay server further includes: and starting a timer to time after the server is disconnected, and connecting the server after the time counting is finished.
9. A data transmission apparatus, comprising:
a receiving module: the short connection is established with the client, and the data is acquired through the long connection established with the second relay server;
a notification module: the server is used for receiving the client disconnection request and sending a disconnection notification to the second relay server according to the disconnection request;
a cache module: caching a data request initiated by the client in a time interval before the second relay server is successfully connected with the server after the client is disconnected from the client before the client finishes the data acquisition request until a notification message that the second relay server is successfully connected with the server is received,
a forwarding module: for forwarding the cached data request to the second relay server.
10. A data transmission apparatus, comprising;
a receiving module: the server is used for receiving the service request forwarded by the first relay server through the long connection established with the first relay server, establishing short connection with the server, and sending the service request to the server to acquire data;
an interrupt module: before receiving a request for completing data acquisition, after receiving a notification of disconnection between the first relay server and a client, disconnecting the server and reconnecting the server;
a notification module: and the notification message is used for sending the successful connection to the first relay server.
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| CN109657004A (en) * | 2018-12-10 | 2019-04-19 | 北京明朝万达科技股份有限公司 | A kind of method of data synchronization and device |
| CN110071925B (en) * | 2019-04-25 | 2021-01-15 | 腾讯科技（深圳）有限公司 | Data transmission method and corresponding server and computer readable storage medium |
| CN113992737A (en) * | 2020-07-09 | 2022-01-28 | 青岛海信宽带多媒体技术有限公司 | Internet of things connection method, gateway server and gateway |
| CN111800316B (en) * | 2020-07-16 | 2021-08-13 | 浙江百应科技有限公司 | Method for solving server link closing of pipeline type http request |
| CN111835856B (en) * | 2020-07-17 | 2022-09-16 | 北京百度网讯科技有限公司 | File downloading method, device, equipment and storage medium |
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