CN106911481A - The method and device controlled the data flows - Google Patents

Abstract

The embodiment of the present invention discloses a method and device for controlling data traffic. The method includes: a data terminal sends a data request to a VPN server through a virtual private network VPN channel, and the data request includes a data request corresponding to the data request. An instruction to compress resources according to a first compression rate; the data terminal receives the data resource sent by the VPN server through the VPN channel, and the data resource is compressed by the VPN server according to the first compression rate . After the data resource is compressed, its size will usually be reduced, and after decompressed on the smart phone, the display will not cause user experience. Therefore, the method provided in this embodiment solves the problem of controlling the data traffic consumed by the data terminal in the prior art. Technical issues that affect user experience by removing important components of a web page.

Description

Method and device for controlling data flow

technical field

The invention relates to the field of electronic technology, in particular to a method and device for controlling data flow.

Background technique

With the popularity of smart phones, mobile Internet access has become an indispensable requirement for "mobile Internet users". Different from the previous non-smartphone era where users could only access WAP websites, smartphones have completely broken the boundary between WAP and WWW websites, making users find that the mobile Internet traffic has increased a lot, and the monthly traffic fee that needs to be paid is very considerable. For smartphones, the services that tend to generate high traffic during accessing the network mainly include: browsing web pages with a large number of pictures or web pages with audio and video files attached.

At present, in order to control the data traffic consumed by data terminals such as smartphones, smartphones will provide a "traffic-saving" browsing mode. Specifically, large files such as pictures and audio and video files in web pages will be removed through the cache server, and only text will be sent. and frame information to smartphones, but pictures or audio and video files in web pages are an important part of the web page, which will obviously greatly affect the user experience after removal.

Therefore, there is a technical problem in the prior art method of controlling the data traffic consumed by the data terminal, which affects user experience due to the removal of important components in the webpage.

Contents of the invention

The embodiments of the present invention provide a method and device for controlling data flow to solve the technical problem that the prior art method of controlling data flow consumed by data terminals affects user experience due to removal of important components in webpages.

The first aspect of the embodiment of the present invention provides a method for controlling data traffic, the method comprising:

The data terminal sends a data request to the VPN server through a virtual private network VPN channel, and the data request includes an instruction to compress the data resource corresponding to the data request at a first compression rate;

The data terminal receives the data resource sent by the VPN server through the VPN channel, and the data resource is compressed by the VPN server according to the first compression rate.

Optionally, before the data terminal sends the data request to the VPN server through a virtual private network VPN tunnel, the method further includes:

The data terminal establishes the VPN tunnel with the VPN server.

Optionally, after the data terminal receives the data resource sent by the VPN server through the VPN channel, the method further includes:

The data terminal interrupts the VPN channel.

Optionally, before the data terminal sends the data request to the VPN server through a virtual private network VPN tunnel, the method further includes:

The data terminal receives a compression instruction, and based on the compression instruction, writes the first compression ratio into the data request.

Optionally, before the data terminal sends the data request to the VPN server through a virtual private network VPN tunnel, the method further includes:

The data terminal compresses the data request.

Optionally, the data terminal compresses the data request, specifically including:

The data terminal compresses the HTTP header information of the data request according to the pre-established HTTP header information character library; and

The data terminal compresses the uplink data requested by the data through a compression algorithm whose resource occupancy rate is lower than a preset value.

The second aspect of the embodiment of the present invention provides a device for controlling data flow, the device includes:

A sending unit, configured to send a data request to a VPN server through a virtual private network VPN channel, where the data request includes a first compression rate for compressing data resources corresponding to the data request;

The receiving unit is configured to receive the data resource sent by the VPN server through the VPN tunnel, and the data resource is compressed by the VPN server according to the first compression rate.

Optionally, the device also includes:

The VPN tunnel unit is configured to establish the VPN tunnel with the VPN server before the sending unit sends the data request to the VPN server through the VPN tunnel.

Optionally, the VPN tunnel unit is further configured to interrupt the VPN tunnel after the receiving unit receives the data resource sent by the VPN server through the VPN tunnel.

Optionally, the device further includes a first compression rate writing unit, the first compression rate writing unit is used to receive the compressed instruction, and based on the compression instruction, write the first compression rate into the data request.

Optionally, the device further includes a compression unit, configured to compress the data request before the sending unit sends the data request to the VPN server through a virtual private network VPN channel.

Optionally, the compression unit is specifically configured to compress the HTTP header information of the data request according to the pre-established HTTP header information character library, and compress the data request by using a compression algorithm whose resource occupancy rate is lower than a preset value. The uplink data is compressed.

One or more technical solutions provided in the embodiments of the present invention have at least the following technical effects or advantages:

Since the data terminal is used to add an instruction to compress the data resource corresponding to the data request according to the first compression ratio in the data request when sending the data request, the received data resource is compressed according to the first compression ratio through the VPN server. The technical solution of the final data packet, after the data resource is compressed, its size will usually be reduced, and after decompression on the smart phone, the display will not cause user experience, so the method provided by this embodiment solves the problem of controlling data in the prior art. There are technical problems in the way of data traffic consumed by the terminal, which affects user experience due to the removal of important components in the web page.

Description of drawings

Fig. 1 is a schematic diagram of a system to which the scheme provided by the present invention is applicable;

FIG. 2 is a flow chart of a method for controlling data traffic on a data terminal provided by an embodiment of the present embodiment;

FIG. 3 is a flowchart of a method for controlling data traffic on a data terminal provided by another embodiment of this embodiment;

Fig. 4 is a schematic diagram of an apparatus for controlling data flow on a data terminal provided by an embodiment of the present invention.

detailed description

The embodiments of the present invention provide a method and device for controlling data flow to solve the technical problem that the prior art method of controlling data flow consumed by data terminals affects user experience due to removal of important components in webpages.

In this embodiment, the data terminal may specifically be a smart phone, a tablet computer or a personal PDA (English: Personal Digital Assistant; Chinese: Personal Digital Assistant, also called a handheld computer), which is not limited here.

Embodiments of the present invention provide a method and device for controlling data flow, please refer to FIG. 1 , which is a schematic diagram of a system to which the solution provided by the present invention is applicable. As shown in Fig. 1, the applicable system of the present invention comprises data terminal 101, VPN (Virtual Private Network, Virtual Private Network) server 102 and resource server 103, in actual data service execution process, between data terminal 101 and VPN server 102 A VPN tunnel is established between them.

In the embodiment of the present invention, a VPN service is created inside the data terminal 101, which is the client end of the VPN service, and a VPN service is also created in the VPN server 102, which is the server end of the VPN service, and the client end and the server end are connected through a VPN Communication channels can ensure the security of information.

In the specific implementation process, the mobile communication operator will charge the traffic for the uplink data packets sent by the data terminal 101 and the downlink data packets received, so controlling the data flow corresponding to the uplink data packets and the downlink data packets on the data terminal 101 is It can reduce the user's spending on data traffic.

The resource server 103 is a server that provides data resources to the data terminal 101, and can provide resource download services.

Under the framework of the system shown in FIG. 1 , the present invention provides several embodiments of the method for controlling data flow on the data terminal 101 , which are described in detail as follows.

In order to introduce the technical solution in the embodiment of the present invention in more detail, in the next part, the data terminal 101 is specifically a smart phone as an example for introduction.

Embodiment one

Please refer to FIG. 2. FIG. 2 is a flowchart of a method for controlling data traffic on a data terminal provided in this embodiment. As shown in FIG. 2, the method includes:

101: The data terminal sends the data request to the VPN server through the VPN channel of the virtual private network, and the data request includes an instruction to compress the data resource corresponding to the data request according to the first compression rate;

In this embodiment, if the data request sent by the smart phone is set as a request to visit a certain web page, the data terminal will send the data request to the VPN server through the VPN tunnel; For an instruction requesting that the corresponding data resources be compressed according to the first compression rate, for example, the first compression rate is set to 60%.

After receiving the data request, the VPN server forwards the data request to the resource server, and the resource server sends the web page corresponding to the data request to the VPN server according to the data request.

After receiving the webpage, the VPN server compresses the webpage according to the first compression ratio, and sends the compressed data packet to the smart phone. At this point, the method for controlling data traffic on a data terminal provided by the embodiment of the present invention enters step 102 .

102: The data terminal receives the data resource sent by the VPN server through the VPN channel, and the data resource is compressed by the VPN server according to the first compression ratio.

In this embodiment, the smart phone can receive the data resource sent by the VPN server through the VPN channel, and the data resource is the data packet that the VPN server compresses the web page corresponding to the data request according to the first compression rate. After the data resource is compressed, its size will usually be reduced, realizing the technical effect of controlling the data flow, and displaying no user experience after decompression on the smart phone, so it solves the problem of controlling the data flow consumed by the data terminal in the prior art There is a technical problem that affects the user experience due to the removal of important components in the webpage.

It can be seen that since the data terminal is used to add an instruction to compress the data resources corresponding to the data request according to the first compression rate in the data request when sending the data request, the received data resources are compressed according to the first compression ratio by the VPN server. The technical scheme of compressing the data packet, the size of the data resource will usually be reduced after being compressed, and the display on the smart phone will not cause user experience, so the method provided in this embodiment solves the problems in the prior art. The method of controlling the data flow consumed by the data terminal has the technical problem of affecting user experience due to the removal of important components in the web page.

Embodiment two

The second embodiment is a refinement based on the first embodiment, and provides a detailed application scenario for the method provided by the first embodiment.

Please refer to FIG. 3. FIG. 3 is a flowchart of a method for controlling data traffic on a data terminal provided in this embodiment. As shown in FIG. 3, the method includes:

201: The data terminal establishes a VPN channel with the VPN server;

Specifically, the smart phone sends a connection request to the VPN server by setting the corresponding VPN connection parameters. Establish a VPN tunnel between them, so I won’t go into details here.

202: The data terminal receives the compression instruction, and based on the compression instruction, writes the first compression ratio into the data request;

Specifically, the user sets the first compression rate for the webpage according to actual needs, and the first compression rate may be 60% or 80%, for example, and there is no limitation here.

The user inputs a compression command through a corresponding input interface on the smart phone, and the smart phone can receive the compression command, and write the first compression ratio into the data request according to the compression command.

In other embodiments, there is no limitation on the order of steps 201 and 202, and those skilled in the art can select an appropriate order according to the actual situation, so details will not be repeated here.

203: The data terminal compresses the data request;

Specifically, the uplink data of the smartphone, that is, the data sent by the smartphone to the VPN server will also be included in the data traffic consumed by the smartphone. and other operations, so the method provided in this embodiment further includes: the data terminal compresses the data request.

In the specific implementation process, the data terminal compressing the data request may include: the data terminal compresses the HTTP header information of the data request according to the pre-established HTTP header information character library; The compression algorithm compresses the uplink data of the data request.

There are currently many algorithms for compressing data, making data compression relatively easy to implement. But for the HTTP header information, since the HTTP header information contains character units such as letters and words, and the HTTP header information transmits relatively important information, these characters are not easy to be compressed, and once the compression algorithm fails If it is damaged, it will cause errors in information transmission, which will lead to failure of downloading resources. Therefore, a dedicated compression method is required for the HTTP header information in the data request.

In this embodiment, the HTTP header information is compressed by using a pre-established HTTP header information character library. By compressing the HTTP header information through the pre-established HTTP header information character library, the probability of loss is very low, and it has a certain compression rate.

The establishment process of the HTTP header information character library is as follows: select common HTTP request packets, analyze the HTTP header information in these common HTTP request packets through programs, and parse out common characters (including words, words and their combinations) therefrom, These characters are sorted according to the frequency of occurrence of these characters, and the characters ranked first are selected to be added to the character library, for example, the characters ranked first 20 are selected. In the present invention, the establishment process of the character library is not limited to the above-mentioned process, and methods aiming at selecting common characters to add to the character library all belong to the protection scope of the present invention.

On the premise that the HTTP header information character library is established in advance, compare the characters contained in the HTTP header information with the characters in the character library. If the comparison is consistent, the characters contained in the HTTP header information in the upstream data packet will be compared. Replaced by the offset value of the character in the character library. Take the GET information "GET/simple.htmHTTP/1.1" contained in the HTTP header information as an example, compare the characters "GET", "simple.htm", "HTTP" and "1.1" with the characters in the character library Compare and find that "GET", "HTTP" and "1.1" are all consistent with a character in the character library, then replace these characters with the offset value of the character in the character library, such as: "GET" Replace with "1", "HTTP" with "3", "1.1" with "5", where "1", "3", and "5" are the offset values of the corresponding characters in the character library, The offset value may be the serial number sorted in the above character library, which is not limited in the present invention.

This embodiment does not limit the compression process of uplink data, but it should be noted that, in order not to affect the user's operation of the smart phone, in this embodiment, the smart phone compresses the data with a resource occupancy rate lower than the preset value. The algorithm compresses the uplink data in the data request, so that the compression effect can be achieved without affecting the user's operation.

204: The data terminal sends the data request to the VPN server through the VPN channel of the virtual private network;

In this step, when the smartphone sends the compressed data request to the VPN server, the mobile communication operator will charge for the compressed data request according to the traffic. It can be seen that since the smartphone sends the compressed Therefore, the data traffic is reduced, and the fees that users need to pay to the mobile communication operator are reduced, and the specific content of the data request will not be affected at the same time.

After the VPN server receives the compressed data request sent by the user, it can decompress the data request, specifically, decompress the HTTP header information of the data request according to the pre-established HTTP header information character library; and Decompress the uplink data of the data request.

The establishment process and functions of the HTTP header information character library have been introduced in detail in the previous part, and will not be repeated here; at the same time, since the VPN server has much more system resources than the data terminal, the uplink data of the data request is processed. The process of decompression processing does not need to be limited, and it can be processed according to the normal data decompression process, which will not be repeated here.

After the VPN server decompresses the data request, the VPN server can send the data request to the corresponding resource server. After receiving the data request, the resource server returns the data resource corresponding to the data request to the VPN server. In this embodiment, if the data request is set as a request for a certain webpage, then the data resource is the data resource corresponding to the webpage.

After the VPN server receives the data resource corresponding to the web page sent by the resource server, it can compress the data resource according to the instruction included in the data request to compress the data resource corresponding to the data request according to the first compression rate. downlink data packet and send the data packet to the smartphone.

The process of compressing data resources by the VPN server. Specifically, the VPN server can use a compression algorithm with a compression rate higher than the first compression rate to compress data resources into downlink data packets to ensure the compression effect. Since the system resources owned by the VPN server are less than There are many data terminals, so the compression process here only needs to ensure the compression effect, without considering the consumption of system resources.

205: The data terminal receives the data resource sent by the VPN server through the VPN channel;

In this embodiment, after receiving the downlink data packet sent by the VPN server through the VPN channel, the smart phone decompresses the downlink data packet, that is, the data resource corresponding to the data request can be obtained.

In this step, when the smart phone receives the downlink data packet sent by the VPN server through the VPN channel, the mobile communication operator will charge the downlink data packet according to the traffic. It can be seen that since the smart phone sends the compressed Data resources, so the data traffic is reduced, which also reduces the fees that users need to pay to mobile communication operators, and will not affect the specific content of data resources.

206: The data terminal interrupts the VPN channel.

After the smart phone receives the downlink data packet, the smart phone can interrupt the VPN channel. In this way, it is equivalent to realizing the VPN service through a short connection between the smart phone and the VPN server. The advantage of the VPN service realized through the short connection is power saving , without excessive consumption of smartphone power.

It can be seen that since the data terminal is used to add an instruction to compress the data resources corresponding to the data request according to the first compression rate in the data request when sending the data request, the received data resources are compressed according to the first compression ratio by the VPN server. The technical scheme of compressing the data packet, the size of the data resource will usually be reduced after being compressed, and the display on the smart phone will not cause user experience, so the method provided in this embodiment solves the problems in the prior art. The method of controlling the data flow consumed by the data terminal has the technical problem of affecting user experience due to the removal of important components in the web page.

Embodiment three

In order to implement the method for controlling data traffic on a data terminal provided by an embodiment of the present invention, please refer to FIG. 4 . FIG. 4 is a schematic diagram of a device for controlling data traffic on a data terminal provided by an embodiment of the present invention. As shown in FIG. 4 , the device include:

The sending unit 401 is configured to send the data request to the VPN server through the virtual private network VPN channel, and the data request includes a first compression rate for compressing the data resources corresponding to the data request;

The receiving unit 402 is configured to receive the data resource sent by the VPN server through the VPN channel, and the data resource is compressed by the VPN server according to a first compression rate.

Further, the device also includes:

The VPN tunnel unit 403 is configured to establish a VPN tunnel with the VPN server before the sending unit 401 sends the data request to the VPN server through the virtual private network VPN tunnel.

Further, the VPN tunnel unit 403 is specifically configured to interrupt the VPN tunnel after the receiving unit 402 receives the data resource sent by the VPN server through the VPN tunnel.

Further, the device further includes a first compression ratio writing unit 404, and the first compression ratio writing unit 404 is configured to receive a compression instruction before the sending unit 401 sends the data request to the VPN server through a virtual private network VPN tunnel, and based on The compression instruction writes the first compression rate into the data request.

Further, the device further includes a compression unit 405, and the compression unit 405 is configured to compress the data request before the sending unit 401 sends the data request to the VPN server through the virtual private network VPN tunnel.

Further, the compression unit 405 is specifically configured to compress the HTTP header information of the data request according to the pre-established HTTP header information character library, and compress the upstream data of the data request through a compression algorithm whose resource occupancy rate is lower than a preset value.

The device for controlling data flow on a data terminal provided by the embodiment of the present invention is based on two aspects under the same inventive concept as the method for controlling data flow on a data terminal introduced in the foregoing embodiments, and has been introduced in detail in the first aspect The operation principle and process of the method for controlling data flow on the data terminal are not described here for the sake of brevity.

One or more technical solutions in the embodiments of the present invention have at least the following technical effects or advantages:

Since the data terminal is used to add an instruction to compress the data resource corresponding to the data request according to the first compression ratio in the data request when sending the data request, the received data resource is compressed according to the first compression ratio through the VPN server. The technical solution of the final data packet, after the data resource is compressed, its size will usually be reduced, and after decompression on the smart phone, the display will not cause user experience, so the method provided by this embodiment solves the problem of controlling data in the prior art. There are technical problems in the way of data traffic consumed by the terminal, which affects user experience due to the removal of important components in the web page.

The embodiment of the invention discloses:

A1, a method for controlling data flow, is characterized in that, described method comprises:

The data terminal sends a data request to the VPN server through a virtual private network VPN channel, and the data request includes an instruction to compress the data resource corresponding to the data request at a first compression rate;

The data terminal receives the data resource sent by the VPN server through the VPN channel, and the data resource is compressed by the VPN server according to the first compression rate.

A2. according to the method described in A1, it is characterized in that, before the data terminal sends the data request to the VPN server through the VPN channel of the virtual private network, the method also includes:

The data terminal establishes the VPN tunnel with the VPN server.

A3. The method according to A2, wherein after the data terminal receives the data resource sent by the VPN server through the VPN tunnel, the method further includes:

The data terminal interrupts the VPN channel.

A4, according to the method described in A1, it is characterized in that, before the data terminal sends the data request to the VPN server through the VPN channel of the virtual private network, the method also includes:

The data terminal receives a compression instruction, and based on the compression instruction, writes the first compression rate into the data request.

A5, according to the method described in A1, it is characterized in that, before the data terminal sends the data request to the VPN server through the VPN channel of the virtual private network, the method also includes:

The data terminal compresses the data request.

A6, the method as described in A5, is characterized in that, described data terminal compresses described data request, specifically comprises:

The data terminal compresses the HTTP header information of the data request according to the pre-established HTTP header information character library; and

The data terminal compresses the uplink data requested by the data through a compression algorithm whose resource occupancy rate is lower than a preset value.

B7. A device for controlling data flow, characterized in that said device comprises:

A sending unit, configured to send a data request to a VPN server through a virtual private network VPN channel, where the data request includes a first compression rate for compressing data resources corresponding to the data request;

The receiving unit is configured to receive the data resource sent by the VPN server through the VPN tunnel, and the data resource is compressed by the VPN server according to the first compression rate.

B8, according to the device described in B7, it is characterized in that, described device also comprises:

The VPN tunnel unit is configured to establish the VPN tunnel with the VPN server before the sending unit sends the data request to the VPN server through the VPN tunnel.

B9. The device according to B8, wherein the VPN tunnel unit is further configured to interrupt the VPN tunnel after the receiving unit receives the data resource sent by the VPN server through the VPN tunnel .

B10, according to the device described in B7, it is characterized in that, the device also includes a first compression rate writing unit, and the first compression rate writing unit is used to write data through a virtual private network VPN channel in the sending unit Before the request is sent to the VPN server, a compression instruction is received, and based on the compression instruction, the first compression ratio is written into the data request.

B11, according to the device described in B7, it is characterized in that, the device also includes a compression unit, the compression unit is used to send the data request to the VPN server through the virtual private network VPN tunnel before the sending unit, Data requests are compressed.

B12. The device according to B11, wherein the compression unit is specifically configured to compress the HTTP header information of the data request according to the pre-established HTTP header information character library, and the resource occupancy rate is lower than the preset The value compression algorithm compresses the uplink data of the data request.

The algorithms and displays presented herein are not inherently related to any particular computer, virtual system, or other device. Various generic systems can also be used with the teachings based on this. The structure required to construct such a system is apparent from the above description. Furthermore, the present invention is not specific to any particular programming language. It should be understood that various programming languages can be used to implement the contents of the present invention described herein, and the above description of specific languages is for disclosing the best mode of the present invention.

In the description provided herein, numerous specific details are set forth. However, it is understood that embodiments of the invention may be practiced without these specific details. In some instances, well-known methods, structures and techniques have not been shown in detail in order not to obscure the understanding of this description.

Similarly, it should be appreciated that in the foregoing description of exemplary embodiments of the invention, in order to streamline this disclosure and to facilitate an understanding of one or more of the various inventive aspects, various features of the invention are sometimes grouped together in a single embodiment, figure, or its description. This method of disclosure, however, is not to be interpreted as reflecting an intention that the claimed invention requires more features than are expressly recited in each claim. Rather, as the following claims reflect, inventive aspects lie in less than all features of a single foregoing disclosed embodiment. Thus, the claims following the Detailed Description are hereby expressly incorporated into this Detailed Description, with each claim standing on its own as a separate embodiment of this invention.

Those skilled in the art can understand that the modules in the device in the embodiment can be adaptively changed and arranged in one or more devices different from the embodiment. Modules or units or components in the embodiments may be combined into one module or unit or component, and furthermore may be divided into a plurality of sub-modules or sub-units or sub-assemblies. All features disclosed in this specification (including accompanying claims, abstract and drawings) and any method or method so disclosed may be used in any combination, except that at least some of such features and/or processes or units are mutually exclusive. All processes or units of equipment are combined. Each feature disclosed in this specification (including accompanying claims, abstract and drawings) may be replaced by alternative features serving the same, equivalent or similar purpose, unless expressly stated otherwise.

Furthermore, those skilled in the art will understand that although some embodiments described herein include some features included in other embodiments but not others, combinations of features from different embodiments are meant to be within the scope of the invention. and form different embodiments. For example, in the following claims, any of the claimed embodiments may be used in any combination.

The various component embodiments of the present invention may be implemented in hardware, or in software modules running on one or more processors, or in a combination thereof. It should be understood by those skilled in the art that a microprocessor or a digital signal processor (DSP) can be used in practice to implement some or all of the components in the title of the invention (such as the device for determining the link level in the website) according to the embodiment of the present invention some or all of the features. The present invention can also be implemented as an apparatus or an apparatus program (for example, a computer program and a computer program product) for performing a part or all of the methods described herein. Such a program for realizing the present invention may be stored on a computer-readable medium, or may be in the form of one or more signals. Such a signal may be downloaded from an Internet site, or provided on a carrier signal, or provided in any other form.

It should be noted that the above-mentioned embodiments illustrate rather than limit the invention, and that those skilled in the art will be able to design alternative embodiments without departing from the scope of the appended claims. In the claims, any reference signs placed between parentheses shall not be construed as limiting the claim. The word "comprising" does not exclude the presence of elements or steps not listed in a claim. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements. The invention can be implemented by means of hardware comprising several distinct elements, and by means of a suitably programmed computer. In a unit claim enumerating several means, several of these means can be embodied by one and the same item of hardware. The use of the words first, second, and third, etc. does not indicate any order. These words can be interpreted as names.

Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalent technologies, the present invention also intends to include these modifications and variations.

Claims (10)

1. The method for controlling data flow, is characterized in that, described method comprises: The data terminal sends a data request to the VPN server through a virtual private network VPN channel, and the data request includes an instruction to compress the data resource corresponding to the data request at a first compression rate; The data terminal receives the data resource sent by the VPN server through the VPN channel, and the data resource is compressed by the VPN server according to the first compression rate. 2. The method according to claim 1, wherein, before the data terminal sends the data request to the VPN server through a virtual private network (VPN) tunnel, the method further comprises: The data terminal establishes the VPN tunnel with the VPN server. 3. The method according to claim 2, wherein after the data terminal receives the data resource sent by the VPN server through the VPN channel, the method further comprises: The data terminal interrupts the VPN channel. 4. The method according to claim 1, wherein, before the data terminal sends the data request to the VPN server through a virtual private network (VPN) channel, the method further comprises: The data terminal receives a compression instruction, and based on the compression instruction, writes the first compression rate into the data request. 5. The method according to claim 1, wherein, before the data terminal sends the data request to the VPN server through a virtual private network (VPN) tunnel, the method further comprises: The data terminal compresses the data request. 6. The method according to claim 5, wherein the data terminal compresses the data request, specifically comprising: The data terminal compresses the HTTP header information of the data request according to the pre-established HTTP header information character library; and The data terminal compresses the uplink data requested by the data through a compression algorithm whose resource occupancy rate is lower than a preset value. 7. A device for controlling data flow, characterized in that the device comprises: A sending unit, configured to send a data request to a VPN server through a virtual private network VPN channel, where the data request includes a first compression rate for compressing data resources corresponding to the data request; The receiving unit is configured to receive the data resource sent by the VPN server through the VPN tunnel, and the data resource is compressed by the VPN server according to the first compression rate. 8. The device according to claim 7, further comprising: The VPN tunnel unit is configured to establish the VPN tunnel with the VPN server before the sending unit sends the data request to the VPN server through the VPN tunnel. 9. The device according to claim 8, wherein the VPN tunnel unit is further configured to interrupt the VPN tunnel. 10. The device according to claim 7, characterized in that the device further comprises a first compression rate writing unit, and the first compression rate writing unit is used to pass a virtual private network (VPN) channel in the sending unit Before sending the data request to the VPN server, a compression instruction is received, and based on the compression instruction, the first compression rate is written into the data request.