CN116016669A - Dynamic network proxy access method and system for image transmission - Google Patents
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Abstract
The invention discloses a dynamic network proxy access method and a system for image transmission, which relate to the technical field of communication and comprise the following steps: the client acquires a request parameter block of the image transmission service; the client is connected with the proxy gateway according to the gateway address to be accessed, and transmits the image protocol negotiation data to be transmitted and the image server address to be accessed to the proxy gateway; the proxy gateway analyzes the address of the image server to be accessed to determine a target image server, and sends the image protocol negotiation data to be transmitted to the target image server; the target graphic server sends the serialized image protocol data back to the client through the proxy gateway so as to realize image transmission between the target graphic server and the client; wherein, the client, the proxy gateway and the target graphic server are integrated with QUIC protocol stacks. The invention realizes the dynamic proxy for the image transmission by supporting the QUIC protocol through the proxy gateway.
Description
Technical Field
The invention relates to the technical field of communication, in particular to a dynamic network proxy access method and a system supporting image transmission of QUIC protocol.
Background
With the development of the internet, TCP has become one of the most widely used and deployed protocols on the internet and has been considered as a network-based stone for many years, but various drawbacks of TCP exposure have been difficult to conform to the current development form of the network. With HTTP/3 formally standardized, the UDP-based QUIC protocol is increasingly adopted by industry vendors, however, the QUIC protocol itself does not support dynamic proxy functions, and is limited in many scenarios.
For example, if there are multiple network services based on the QUIC protocol in the cluster, and there is no dynamic proxy function, and centralized unified forwarding of the gateway is lacking, the UDP port of each network service needs to be simultaneously opened to the outside, and both the security factor and the management aspect face relatively large risks and problems.
The main disadvantages of the existing network proxy access technology are focused on the following aspects: 1) Dynamic agents are not supported, only static agents, such as nginx, iptables, etc. 2) Agents that do not support the udp protocol, but only the tcp protocol, such as haproxy, rinetd, etc. 3) Supporting the udp protocol proxy but not the qic protocol, such as various implementations of the socks5 protocol. 4) The QUIC protocol latest standard rfc9000, published by 2022, does not define a proxy-related implementation mechanism.
Disclosure of Invention
The invention aims to provide a dynamic network proxy access method and a system for image transmission, which realize dynamic proxy for image transmission by supporting QUIC protocol through proxy gateway.
In order to achieve the above object, the present invention provides the following solutions:
in a first aspect, the present invention provides a dynamic network proxy access method for image transmission, including:
the client acquires a request parameter block of the image transmission service; the request parameter block of the image transmission service comprises image protocol negotiation data to be transmitted, a gateway address to be accessed and a graphic server address to be accessed;
the client is connected with the proxy gateway according to the gateway address to be accessed, and transmits the image protocol negotiation data to be transmitted and the image server address to be accessed to the proxy gateway;
the proxy gateway analyzes the address of the to-be-accessed graphic server to determine a target graphic server, and sends the to-be-transmitted image protocol negotiation data to the target graphic server;
the target graphic server sends the coded serialized image protocol data back to the client through the proxy gateway so as to realize image transmission between the target graphic server and the client; the coded serialized image protocol data is determined according to the image protocol negotiation data to be transmitted;
and the client, the proxy gateway and the target graphic server are integrated with a QUIC protocol stack.
Optionally, the gateway address to be accessed includes a gateway IP set to be accessed; the gateway IP set to be accessed comprises one or more proxy gateway IP addresses;
the client is connected with the proxy gateway according to the gateway address to be accessed, and specifically comprises the following steps:
the client determines an access connection mode according to the gateway IP set to be accessed; the access connection mode comprises gateway proxy mode connection and non-gateway proxy mode connection;
when the access connection mode is gateway proxy mode connection, the client determines an optimal gateway IP according to the gateway IP set to be accessed;
and the client determines the address of the proxy gateway through the optimal gateway IP and is connected with the proxy gateway.
Optionally, the client determines an access connection mode according to the gateway IP set to be accessed, which specifically includes:
judging whether an IP value exists in a field corresponding to any proxy gateway IP address;
if the field corresponding to the proxy gateway IP address has an IP value, the access connection mode is gateway proxy mode connection;
and if the field corresponding to the proxy gateway IP address does not have the IP value, the access connection mode is non-gateway proxy mode connection.
Optionally, the determining, by the client, the optimal gateway IP according to the gateway IP set to be accessed specifically includes:
when the proxy gateway IP address is one, the proxy gateway IP address is the optimal gateway IP;
when the proxy gateway IP addresses are multiple, the client side respectively sends request response signals to the multiple proxy gateway IP addresses, and the proxy gateway IP address with the shortest response time is determined to be the optimal gateway IP.
Optionally, the proxy gateway analyzes the address of the to-be-accessed graphic server to determine a target graphic server, which specifically includes:
the proxy gateway analyzes the image server address to be accessed to obtain an access real address;
the proxy gateway judges whether the access real address is legal or not based on a regular expression;
if the access real address does not exist legally, stopping access;
and if the access real address is legal, the proxy gateway is connected with a target graphic server corresponding to the access real address.
Optionally, the method further comprises:
the target graphic server establishes connection according to the negotiation data of the image protocol to generate images, and then sequentially performs image coding and data packaging on the corresponding images to obtain image protocol data to be returned;
and the target graphic server sends the image protocol data to be returned back to the client through the proxy gateway.
Optionally, the image encoding is h.264 encoding, VP8 encoding or JPEG encoding; the data encapsulation is encapsulation by adopting Protobuf or Json data format serialization technology.
In a second aspect, the present invention provides a dynamic network proxy access system for image transmission, comprising:
a client for:
acquiring a request parameter block of an image transmission service; the request parameter block of the image transmission service comprises image protocol negotiation data to be transmitted, a gateway address to be accessed and a graphic server address to be accessed;
connecting with the proxy gateway according to the gateway address to be accessed, and sending the image protocol negotiation data to be transmitted and the image server address to be accessed to the proxy gateway;
the proxy gateway is used for:
analyzing the address of the to-be-accessed graphic server to determine a target graphic server, and sending the to-be-transmitted image protocol negotiation data to the target graphic server;
the target graphic server is used for:
sending the coded serialized image protocol data back to the client through the proxy gateway to realize image transmission between the target graphic server and the client; the coded serialized image protocol data is determined according to the image protocol negotiation data to be transmitted;
and the client, the proxy gateway and the target graphic server are integrated with a QUIC protocol stack.
According to the specific embodiment provided by the invention, the invention discloses the following technical effects:
the invention discloses a dynamic network proxy access method and a system for image transmission, which relate to the technical field of communication and comprise the following steps: the client acquires the image protocol negotiation data to be transmitted, the gateway address to be accessed and the image server address to be accessed; the client is connected with the proxy gateway according to the gateway address to be accessed, and transmits the image protocol negotiation data to be transmitted and the image server address to be accessed to the proxy gateway; the proxy gateway analyzes the address of the image server to be accessed to determine a target image server, and sends the image protocol negotiation data to be transmitted to the target image server; the target graphic server analyzes the image protocol negotiation to establish connection, and sends the serialized image protocol data back to the client through the proxy gateway so as to realize the image transmission between the target graphic server and the client. The invention does not need to configure the proxy forwarding destination in the image transmission process in advance, and the proxy gateway dynamically analyzes the real destination of the image transmission protocol, namely the target graphic server according to the proxy data based on the QUIC protocol load, thereby more flexibly managing the network link and the network data flow direction thereof.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions of the prior art, the drawings that are needed in the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a flow chart of a dynamic network proxy access method for image transmission according to the present invention;
FIG. 2 is a schematic diagram of an access flow according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a dynamic network proxy access system for image transmission according to the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The invention aims to provide a dynamic network proxy access method and a system for image transmission, which realize dynamic proxy for image transmission by supporting a QUIC protocol through a proxy gateway, can realize dynamic forwarding of a network link under a service scene used for the QUIC protocol, reduce the number of ports of the QUIC service which are open to the outside, and provide high available service capacity which can realize load balancing.
In order that the above-recited objects, features and advantages of the present invention will become more readily apparent, a more particular description of the invention will be rendered by reference to the appended drawings and appended detailed description.
Example 1
As shown in fig. 1 and 2, the present embodiment provides a dynamic network proxy access method for image transmission, including:
Specifically, in an actual service scenario, after a client is started, other components transmit an encrypted request parameter block of an image transmission service to the client, and the request parameter block of the image transmission service is decrypted to obtain text content in an INI format, wherein a final address/port to be accessed by the client, namely an address of a to-be-accessed graphic server, is available; there is also a parameter identifying whether the connection passes through a gateway proxy, such as the gateway IP to be accessed. For example:
[JHAPP]
sessionid=531// current session id
mode = winddesktop// service type
ip= 192.168.60.12// server side real ip
port=6405// server port
username = xxx// login username
passwd=xxxxx// login password
gwipist= 192.168.27.169// gateway ip set
gwport=6406// gateway port
And 200, the client is connected with the proxy gateway according to the gateway address to be accessed, and transmits the image protocol negotiation data to be transmitted and the image server address to be accessed to the proxy gateway.
The client is connected with the proxy gateway according to the gateway address to be accessed, and specifically comprises the following steps:
1) The client determines an access connection mode according to the gateway IP set to be accessed; the access connection modes include gateway proxy mode connections and non-gateway proxy mode connections.
Specifically, judging whether an IP value exists in a field corresponding to any proxy gateway IP address; if the field corresponding to the proxy gateway IP address has an IP value, the access connection mode is gateway proxy mode connection; and if the field corresponding to the proxy gateway IP address does not have the IP value, the access connection mode is non-gateway proxy mode connection.
In an actual application scenario, the client determines whether the connection should be through the proxy mode according to whether the gwIpList field exists and has a value.
2) And when the access connection mode is gateway proxy mode connection, the client determines an optimal gateway IP according to the gateway IP set to be accessed. I.e. this step checks if a gateway cluster is configured, in case of simultaneous presence in face of multiple gateway services, an optimal gateway access needs to be selected according to the algorithm.
Specifically, when the proxy gateway IP address is one, the proxy gateway IP address is an optimal gateway IP; when the proxy gateway IP addresses are multiple, the client side respectively sends request response signals to the multiple proxy gateway IP addresses, and the proxy gateway IP address with the shortest response time is determined to be the optimal gateway IP.
In addition, the reply message of the proxy gateway IP will have the current load task number of each proxy gateway IP, and the proxy gateway IP can be selected according to the load task number, so as to realize load balancing.
It can be seen that the present invention supports multi-gateway load balancing. Specifically, a plurality of gateway proxy services can be deployed, and the client side automatically selects the optimal gateway node according to the current gateway load condition, so that the load pressure of a single gateway under a large amount of network data is effectively reduced, and the reliability of the QUIC protocol in the whole service use is improved.
3) And the client determines the address of the proxy gateway through the optimal gateway IP and is connected with the proxy gateway.
And 300, the proxy gateway analyzes the address of the to-be-accessed graphic server to determine a target graphic server, and sends the to-be-transmitted image protocol negotiation data to the target graphic server.
Step 300 specifically includes:
1) And the proxy gateway analyzes the image server address to be accessed to obtain an access real address.
2) The proxy gateway judges whether the access real address is legal or not based on a regular expression; if the access real address does not exist legally, stopping access; and if the access real address is legal, the proxy gateway is connected with a target graphic server corresponding to the access real address.
Based on the information, the proxy gateway does not need to configure the destination of the image transmission protocol in advance, dynamically analyzes the real destination of the image transmission protocol according to the proxy data based on the QUIC protocol load, and manages the network link and the network data flow direction thereof more flexibly.
The client and the server can establish connection and exchange data without a physical network link, and the gateway is not perceived in a logic level. Specifically, the method comprises the following steps: the client establishes a data channel with the proxy gateway, and the proxy gateway simultaneously establishes a corresponding data channel with the server. The data channels are uniformly managed in an object relation mapping mode, and a plurality of dynamic proxy modes of many-to-one, one-to-one and one-to-many are realized by the client and the server. When the client end disconnects the network or the server end disconnects the network, the data channel can automatically judge and destroy the data channel. The data channel has exclusive independent space, the data are not interfered with each other, the client data are distributed with unique identification through the divided data segments of the data channel, and are sent to the server, and the data are delivered to the upper layer application after being recombined, so that the multi-channel and multi-task data transmission task is completed.
And the client, the proxy gateway and the target graphic server are integrated with a QUIC protocol stack. When the client is a QUIC protocol client, the proxy gateway is a QUIC protocol server, and the proxy gateway is used as the QUIC protocol client to connect with the real QUIC protocol server. And the network parameters acquired by the proxy gateway are extracted through QUIC protocol load content and are independent of the internal data of the QUIC protocol.
In a specific practical application, the target graphic server establishes connection according to the image protocol negotiation data, acquires corresponding images, and then sequentially performs image coding and data packaging on the corresponding images to acquire image protocol data to be returned; the image coding is H.264 coding, VP8 coding and/or JPEG coding, and is used for greatly reducing the data volume of network transmission; the data encapsulation is encapsulation by adopting Protobuf or Json data format serialization technology, and is used for conveniently realizing data communication on a cross-platform network.
And then, the target graphic server sends the generated coded serialized image protocol data back to the client through the proxy gateway to realize the QUIC protocol-based network transmission of the image. After receiving the image, the client sequentially performs unpacking operation, image decoding operation and image rendering display operation on the image so as to obtain the high-definition image. Thus, the image transmission process is completed.
Example two
As shown in fig. 3, to execute the technical solution in the first embodiment, the present embodiment provides a dynamic network proxy access system for image transmission, including:
a client for:
acquiring a request parameter block of an image transmission service; the request parameter block of the image transmission service comprises image protocol negotiation data to be transmitted, a gateway address to be accessed and a graphic server address to be accessed;
and connecting with the proxy gateway according to the gateway address to be accessed, and sending the image protocol negotiation data to be transmitted and the image server address to be accessed to the proxy gateway.
The proxy gateway is used for: analyzing the address of the to-be-accessed graphic server to determine a target graphic server, and sending the to-be-transmitted image protocol negotiation data to the target graphic server;
the target graphic server is used for: sending the coded serialized image protocol data back to the client through the proxy gateway to realize image transmission between the target graphic server and the client; the coded serialized image protocol data is determined according to the image protocol negotiation data to be transmitted; and the client, the proxy gateway and the target graphic server are integrated with a QUIC protocol stack.
Compared with the prior art, the invention has the following advantages:
(1) The invention supports the dynamic proxy function, the gateway does not need to be a target address which is configured with an image transmission protocol in advance, and the QUIC client can dynamically access the network service of the target QUIC protocol through the gateway proxy.
(2) The invention supports UDP port, and does not need to rely on TCP protocol.
(3) The invention supports the universal proxy function of QUIC protocol; namely, the QUIC server which can be accessed by the client supporting the QUIC protocol through the proxy gateway.
(4) The proxy gateway supports clustered deployment and supports load balancing of network links; the gateway service supporting QUIC protocol dynamic proxy can be clustered to deploy a plurality of clients, and the clients can automatically select the optimal gateway node in the current cluster to forward data.
(5) The proxy gateway has high availability and ensures that stable and reliable dynamic proxy service is provided.
(6) The invention realizes the functions which do not exist in the original QUIC protocol standard, and maintains compatibility with the standard QUIC: with the continuous development and evolution of QUIC standards, the dynamic proxy protocol of the invention can keep independent compatibility and can not influence deployed services due to different protocol versions.
In the present specification, each embodiment is described in a progressive manner, and each embodiment is mainly described in a different point from other embodiments, and identical and similar parts between the embodiments are all enough to refer to each other. For the system disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant points refer to the description of the method section.
The principles and embodiments of the present invention have been described herein with reference to specific examples, the description of which is intended only to assist in understanding the methods of the present invention and the core ideas thereof; also, it is within the scope of the present invention to be modified by those of ordinary skill in the art in light of the present teachings. In view of the foregoing, this description should not be construed as limiting the invention.
Claims (8)
1. A dynamic network proxy access method for image transmission, the method comprising:
the client acquires a request parameter block of the image transmission service; the request parameter block of the image transmission service comprises image protocol negotiation data to be transmitted, a gateway address to be accessed and a graphic server address to be accessed;
the client is connected with the proxy gateway according to the gateway address to be accessed, and transmits the image protocol negotiation data to be transmitted and the image server address to be accessed to the proxy gateway;
the proxy gateway analyzes the address of the to-be-accessed graphic server to determine a target graphic server, and sends the to-be-transmitted image protocol negotiation data to the target graphic server;
the target graphic server sends the coded serialized image protocol data back to the client through the proxy gateway so as to realize image transmission between the target graphic server and the client; the coded serialized image protocol data is determined according to the image protocol negotiation data to be transmitted;
and the client, the proxy gateway and the target graphic server are integrated with a QUIC protocol stack.
2. The method according to claim 1, wherein the gateway address to be accessed comprises a gateway IP set to be accessed; the gateway IP set to be accessed comprises one or more proxy gateway IP addresses;
the client is connected with the proxy gateway according to the gateway address to be accessed, and specifically comprises the following steps:
the client determines an access connection mode according to the gateway IP set to be accessed; the access connection mode comprises gateway proxy mode connection and non-gateway proxy mode connection;
when the access connection mode is gateway proxy mode connection, the client determines an optimal gateway IP according to the gateway IP set to be accessed;
and the client determines the address of the proxy gateway through the optimal gateway IP and is connected with the proxy gateway.
3. The method for dynamic network proxy access for image transmission according to claim 2, wherein the client determines an access connection mode according to the gateway IP set to be accessed, specifically comprising:
judging whether an IP value exists in a field corresponding to any proxy gateway IP address;
if the field corresponding to the proxy gateway IP address has an IP value, the access connection mode is gateway proxy mode connection;
and if the field corresponding to the proxy gateway IP address does not have the IP value, the access connection mode is non-gateway proxy mode connection.
4. The method for dynamic network proxy access for image transmission according to claim 2, wherein the client determines an optimal gateway IP according to the gateway IP set to be accessed, specifically comprising:
when the proxy gateway IP address is one, the proxy gateway IP address is the optimal gateway IP;
when the proxy gateway IP addresses are multiple, the client side respectively sends request response signals to the multiple proxy gateway IP addresses, and the proxy gateway IP address with the shortest response time is determined to be the optimal gateway IP.
5. The method for dynamic network proxy access for image transmission according to claim 1, wherein the proxy gateway resolves the to-be-accessed graphic server address to determine a target graphic server, and specifically comprises:
the proxy gateway analyzes the image server address to be accessed to obtain an access real address;
the proxy gateway judges whether the access real address is legal or not based on a regular expression;
if the access real address does not exist legally, stopping access;
and if the access real address is legal, the proxy gateway is connected with a target graphic server corresponding to the access real address.
6. The dynamic network proxy access method for image transmission of claim 1, wherein the method further comprises:
the target graphic server establishes connection according to the image protocol negotiation data to generate images, and then sequentially performs image coding and data packaging on the corresponding images to obtain image protocol data to be returned;
and the target graphic server sends the image protocol data to be returned back to the client through the proxy gateway.
7. The dynamic network proxy access method for image transmission according to claim 6, wherein the image coding is h.264 coding, VP8 coding or JPEG coding; the data encapsulation is encapsulation by adopting Protobuf or Json data format serialization technology.
8. A dynamic network proxy access system for image transmission, the system comprising:
a client for:
acquiring a request parameter block of an image transmission service; the request parameter block of the image transmission service comprises image protocol negotiation data to be transmitted, a gateway address to be accessed and a graphic server address to be accessed;
connecting with the proxy gateway according to the gateway address to be accessed, and sending the image protocol negotiation data to be transmitted and the image server address to be accessed to the proxy gateway;
the proxy gateway is used for:
analyzing the address of the to-be-accessed graphic server to determine a target graphic server, and sending the to-be-transmitted image protocol negotiation data to the target graphic server;
the target graphic server is used for:
sending the coded serialized image protocol data back to the client through the proxy gateway to realize image transmission between the target graphic server and the client; the coded serialized image protocol data is determined according to the image protocol negotiation data to be transmitted;
and the client, the proxy gateway and the target graphic server are integrated with a QUIC protocol stack.
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