CN106657162A

CN106657162A - Online stream media playing method and stream media downloading and offline playing method

Info

Publication number: CN106657162A
Application number: CN201710117557.7A
Authority: CN
Inventors: 林杨; 杨睿超
Original assignee: Beijing Dongda Zhengbao Technology Co Ltd
Current assignee: Beijing Dongda Zhengbao Technology Co Ltd
Priority date: 2017-03-01
Filing date: 2017-03-01
Publication date: 2017-05-10
Anticipated expiration: 2037-03-01
Also published as: CN106657162B

Abstract

The invention relates to an online stream media playing method and a stream media downloading and offline playing method. The online stream media playing method comprises the following steps: a mobile application at a client side sends a playing request to a Proxy side; the Proxy side receives and analyzes the playing request, performs content recombination of the playing request and the address of a target stream media server, and sends the playing request to the target stream media server; after receiving the playing request, the stream media server encrypts data requested by the client side, and then, sends the data to the Proxy side; and the Proxy side receives the encrypted data, decrypts the encrypted data, judges whether decryption is successful or not, and sends the data requested by a user to the mobile application when decryption is successful, so that the data is provided for a player to play. By means of the scheme disclosed by the invention, the problems that cross-platform cannot be realized and online protection and protection after downloading cannot be simultaneously realized in the prior art can be solved.

Description

Online streaming media playing method, streaming media downloading method and offline playing method

Technical Field

The invention relates to the technical field of digital copyright protection, in particular to an online streaming media playing method, a streaming media downloading method and an offline playing method.

Background

With the development of the mobile internet, more and more applications (APPs of Android and IOS platforms) of mobile streaming media are provided, and in the aspect of copyright protection of streaming media contents, a common technical scheme in the industry at present includes:

1. by means of on-line authentication and local encryption

When the player requests the online streaming media, the server side authenticates the request and determines the legality of the request. If the authentication is not passed, the download to the local (mobile phone end) is not supported, and if the authentication is passed, the download to the local (mobile phone end) is allowed. And encrypting the local streaming media content based on local hardware. Before local playing, the file is decrypted to the sandbox temporarily and then played.

The disadvantages of this approach are: data in network transmission is not protected by copyright and is easily intercepted from a network end illegally. The copyright protection of the data downloaded to the local area also has huge loopholes, and the copyright protection of the local data depends on the protection of an operating system on a sandbox, so that the data can be easily illegally acquired through the loopholes during playing.

2. Manner of developing player

Aiming at the loopholes in network transmission and local playing in the scheme, the player is developed in a mode that the streaming media content transmitted by the network is encrypted by the server side, and the received content is decrypted by the player. Because the support of corresponding standard protocols is not available, the encryption and decryption have no negotiation mechanism, and more are in a form agreed by two sides together. In this way, the player does not need to decrypt to the sandbox first, but is directly responsible for decryption; however, the self-developed player is easily influenced by the version of the mobile phone operating system and the hardware of the mobile phone, and it is difficult to achieve good compatibility.

3, HTTP LIVE STREAM (HLS) protocol

By adopting the HTTP LIVE STREAM scheme of the apple, the streaming media needs to be sliced according to the scheme of the apple, and the method is not suitable for the transformation of the existing system. In addition, the HLS has insufficient protection for the downloaded local content, and its authentication relies on networking authentication, otherwise there will be a vulnerability. In addition, in the Android system of the earlier version, the player of the Android system does not support the HLS or does not support the HLS well, so that the HLS scheme is not wide in application range.

In summary, the above scheme has obvious disadvantages and no perfect industry standard support of universality. Therefore, it is necessary to provide a method for playing and downloading a mobile streaming media to implement DRM (Digital Rights Management) so as to solve the problem that the prior art cannot be supported by different systems (Android system and IOS system) and cannot simultaneously implement online and post-download protection.

Disclosure of Invention

In view of the foregoing analysis, the present invention aims to provide an online streaming media playing method, a streaming media downloading method, and an offline playing method, so as to solve the problems that the prior art cannot implement cross-platform and cannot implement online and post-download protection at the same time.

The purpose of the invention is mainly realized by the following technical scheme:

provided is an online streaming media playing method for realizing DRM, comprising the steps of:

s1, a mobile application of a client sends a play request to a Proxy;

s2, the proxy receives and analyzes the playing request, and sends the playing request and the address of the target streaming media server to the target streaming media server after the content of the playing request and the address of the target streaming media server are recombined;

s3, the streaming media server receives the recombined playing request, encrypts data requested by the client and sends the encrypted data to the Proxy;

and S4, receiving the encrypted data by the proxy end, decrypting the encrypted data, judging whether decryption is successful, and sending the data requested by the user to the mobile application to be played by the player under the condition of successful decryption.

The client is IOS or Android mobile equipment.

And the playing request sent by the mobile application to the Proxy end comprises a local URL.

The content reassembly comprising: and acquiring the IP address of the streaming media server, the file path and the data range of the request file from the mobile application, replacing the local address in the playing request with the IP address of the streaming media server, and reassembling the local address into the HTTP playing request.

In step S3, the streaming server encrypts the data, including: and dynamically generating a secret key in the program flow by adopting a preset encryption and decryption rule.

In step S4, in case of decryption failure, the Proxy returns information that the decryption failed and cannot be played back to the mobile application.

The invention also provides a method for requesting the playing of the online streaming media through the content distribution network, which comprises the following steps:

s1, a mobile application of a client sends a play request to a Proxy;

s2, receiving and analyzing the playing request by the proxy end, recombining the content of the playing request and sending the content to the target CDN server;

s3, after receiving the playing request, the CDN server detects whether the requested data exists;

if yes, directly sending the encrypted data containing the requested data to the Proxy end;

if the data do not exist, the CDN server returns a response to the Proxy end, the Proxy end analyzes the response and further sends a data request to the data source station, the data source station sends the requested data to the CDN server, and the CDN server encrypts the data and sends the encrypted data to the Proxy end;

s4, receiving and decrypting the encrypted data by the proxy end and judging whether decryption is successful or not; and in case of successful decryption, sending the data requested by the user to the mobile application.

The invention also provides a method for realizing the stream media downloading and the off-line playing of the DRM, which comprises two processes of data downloading and off-line playing.

The data downloading process comprises the following steps:

the mobile application of the client sends a downloading request to the media server;

after receiving the request, the media server side encrypts the data requested to be downloaded and sends the encrypted data to the client side;

the Proxy agent decrypts the received encrypted data, then generates a private key according to an encryption and decryption rule which is different from the encryption and decryption rule of the media server in the client mobile application, encrypts the decrypted data again by using the private key, stores the re-encrypted file in the local, and finishes data downloading;

the off-line playing process of the data comprises the following steps:

a mobile application of a client sends a data acquisition and playing request to a Proxy end;

the Proxy end reads the encrypted data stored in the local equipment;

and the Proxy end decrypts the encrypted data according to the private key provided by the client end and sends the decrypted data to the mobile application for offline playing.

Preferably, the Proxy agent may also store the private key to the local device while storing the re-encrypted file to the local device.

The invention has the following beneficial effects:

the invention can realize cross-platform and can perfectly run under an Android system and an IOS system; the personalized encryption scheme is adopted for customization, and the DRM functional module and the player are bound at the same time, so that the encrypted streaming media data can be played only by using a matched player with the DRM functional module, and the limitation of individual operators is avoided; in addition, the problems of online protection and protection after downloading can be realized.

Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.

Drawings

The drawings are only for purposes of illustrating particular embodiments and are not to be construed as limiting the invention, wherein like reference numerals are used to designate like parts throughout.

FIG. 1 is a schematic diagram of an online streaming media playing method;

FIG. 2 is a flowchart of a method for requesting playing of online streaming media through a CDN;

FIG. 3 is a flow chart of a method for downloading and playing streaming media offline;

fig. 4 is a flowchart of a method for downloading and playing streaming media offline.

Detailed Description

The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, which form a part hereof, and which together with the embodiments of the invention serve to explain the principles of the invention.

According to a first embodiment of the present invention, an online streaming media playing method for implementing DRM is disclosed, as shown in fig. 1, including the following steps:

s1, the mobile application of the client sends a playing request to the embedded Proxy.

The client is IOS or Android mobile equipment, and a Proxy agent end is embedded in mobile application of the client.

The content of the play request includes a URL.

Specifically, the mobile application starts a thread to open an agent program of a Proxy end, and the agent program starts to monitor the internal request of the mobile application.

And S2, the proxy end receives and analyzes the playing request, recombines the content of the playing request and the address of the target streaming media server, and sends the recombined playing request to the target streaming media server.

Specifically, after monitoring the play request of the mobile application, the Proxy client recombines the play request and sends the recombined play request to the specified streaming media server.

The content recombination of the playing request comprises the following steps: the Proxy acquires the IP address of the streaming media server, the file path, the data range of the request file (taking a video file as an example, a data fragment of 1 minute to 8 minutes can be requested) and the like from the mobile application, replaces the local address in the playing request with the IP address of the streaming media server, and reassembles the streaming media server into the HTTP playing request by combining the information of the file path, the data range of the request file and the like.

The concrete description is as follows: assuming that the playing request sent by the mobile application is a URL address of 127.0.0.1:11211, 11211 is used as a monitoring port of the Proxy program, after receiving the mobile application request, the Proxy end replaces the local address of 127.0.0.1 with the IP address of the remote server, and sends the request to the remote server by reassembling the HTTP request. The remote server receives the information and returns the information of the file size content and the like in the form of server response.

And S3, the streaming media server receives the playing request, encrypts data requested by the client according to the agreed key generation rule, and sends the encrypted data to the Proxy end. In the process, the secret key is dynamically generated in the program flow by the preset encryption and decryption rule, and the secret key does not need to be packaged into the license for online authentication. Sending the encrypted data to the Proxy can be performed in a server response mode.

S4, receiving the encrypted data by the proxy side, decrypting the encrypted data according to the agreed encryption and decryption rules, and judging whether decryption is successful or not; under the condition that the decryption is successful, sending the data requested by the user to the mobile application so as to provide the player for normal playing; and under the condition of decryption failure, the Proxy agent end returns the information that the decoding fails and the playing cannot be performed.

According to the method, the key does not need to be stored separately, and only needs to be dynamically generated for encryption according to the encryption rule agreed by the server and the mobile equipment embedded with the DRM module, so that the purpose of online data protection of the streaming media is achieved.

The second embodiment of the present invention discloses a method for realizing DRM online streaming media playing request through a CDN (content delivery Network), as shown in fig. 2, including the following steps:

s1, the mobile application of the client sends a playing request to the embedded Proxy. The client is IOS or Android mobile equipment, and the playing request comprises a URL.

And S2, receiving and analyzing the playing request by the proxy end, recombining the content of the playing request and sending the content to the target CDN server. The CDN server refers to a DNS server special for the CDN.

Wherein,

the content recombination of the playing request comprises the following steps: the Proxy acquires the CDN server IP address, the file path, the data range of the request file (taking a video file as an example, a data fragment of 1 minute to 8 minutes can be requested) and the like from the mobile application, replaces the local address in the playing request with the CDN server IP address, and reassembles the playing request by combining the file path, the data range of the request file and the like. The recombined play request is an HTTP request that is sent to the target CDN server.

S3, after receiving the playing request, the server detects whether the data requested by the client exists; if yes, directly sending the encrypted data (including the requested data) of the 200 response value to the Proxy agent end; if the data requested by the client does not exist, the CDN server returns 302 a response to the Proxy agent, the Proxy agent analyzes the response, and then sends a data request to the data source station, the data source station sends the requested data to the CDN server, and the CDN server encrypts the data and sends the encrypted data to the Proxy agent.

Further, the CDN server caches data obtained from the data source station, so that the next time the client initiates the same request, the file is directly obtained from the CDN server.

S4, receiving the encrypted data by the proxy end, decrypting the encrypted data and judging whether decryption is successful or not; under the condition that the decryption is successful, sending the data requested by the user to the mobile application; and under the condition of decryption failure, the Proxy agent end returns information that the mobile application cannot be played after the decryption failure to the mobile application.

Specifically, the DNS server of the CDN returns the global load balancing device IP address of the CDN to the Proxy agent.

And the Proxy agent end initiates a content URL access request to the global load balancing equipment of the CDN.

And the CDN global load balancing equipment selects the regional load balancing equipment of the region to which the client belongs according to the IP address of the client and the content URL, and informs the Proxy end to initiate a request to the regional load balancing equipment.

The regional load balancing equipment selects a cache server for the Proxy end to provide service, and the selection basis comprises the following steps: judging which cache server is closest to the client according to the IP address of the client; and judging which cache server has the content required by the client according to the content name carried in the URL requested by the client.

If the cache server does not have the content desired by the client or is expired, the global load balancing device returns a response 302 to the Proxy end, and meanwhile, the cache server needs to request the content from the last-level cache server until the source station requests the latest file for caching, and the latest cache file is directly obtained from the cache server when the client initiates the same request next time.

If the cache server has the content desired by the client, the regional load balancing device or the global load balancing device can query the current load condition of each cache server to judge which cache server has the service capability. After comprehensive analysis based on the above conditions, the global load balancing device returns the IP address of one cache server to the Proxy side.

And the Proxy terminal initiates a request to the cache server, the cache server responds to the request and transmits the encrypted data with the response value of 200 to the Proxy terminal.

After receiving the response, the Proxy agent performs the following processing:

a) if the encrypted data of the 200 response value is received. And the Proxy end decrypts the data according to the agreed encryption and decryption rules, the decrypted data can be provided for the player to be played normally if the decryption is successful, and the player cannot be played if the decryption is failed.

b) If the response is received as 302, the Proxy side can analyze the response internally, that is, the HTTP URL of the Location segment in the Header of the response 302 is fetched, and a data request is automatically initiated to the source station, so that the data is not required to be acquired after the cache of the CDN cache server, the speed of acquiring the data is increased, the user experience is improved, and the data can be quickly acquired from the CDN cache server when the data is requested next time.

According to the third embodiment of the present invention, a method for downloading and playing streaming media offline is disclosed,

the downloading process of data is shown in fig. 3, and includes the following steps:

After receiving the request, the media server side encrypts the requested downloaded data by using a preset encryption and decryption rule and sends the encrypted data to the client side;

the Proxy end of the client mobile application decrypts the received encrypted data by using an encryption and decryption rule agreed with the server; then, the mobile application of the client generates a private key according to the own encryption and decryption rule (the encryption and decryption rule of the mobile application is different from the encryption and decryption rule of the media server side), the Proxy agent side encrypts the decrypted data again by using the private key, and stores the re-encrypted file in the local equipment to finish the data downloading process.

In the embodiment, the client side performs encryption again, so that the data stored in the local device cannot be used even if the data is illegally copied.

The off-line playing process of the data is shown in fig. 4, and includes the following steps:

the client is IOS or Android mobile equipment, and a Proxy agent end is embedded in mobile application of the client. The Proxy end reads the encrypted data stored in the local equipment;

and the Proxy end decrypts the encrypted data stored in the local equipment according to a private key provided by the mobile application of the client end, and sends the decrypted data to the mobile application for offline playing.

In the above embodiments 1-3, the online playing is decrypted by using the encryption and decryption rule agreed with the server, and the offline playing is decrypted by using the locally generated key.

According to the fourth embodiment of the present invention, another streaming media downloading and offline playing method is disclosed, which specifically comprises the following steps:

a mobile application of a client sends a request for downloading a streaming media file;

after receiving the request, the streaming media server encrypts data according to an agreed encryption rule and sends the encrypted data to the mobile application;

after receiving the encrypted data, the mobile application decrypts the encrypted data through the Proxy end;

after the Proxy agent decrypts the downloaded data, the mobile application needs to call an encryption method provided by the Proxy agent, and re-encrypts the data by using a key generated by the Proxy agent, and the key is also stored locally;

when off-line playing is carried out, the mobile application decrypts the local file by using the decryption key of the Proxy end and plays the local file.

In summary, the embodiments of the present invention provide an online and offline playing method for streaming media, which can be developed based on C language across platforms, and can perfectly operate under an Android system and an IOS system; the personalized encryption scheme is adopted for customization, and meanwhile, the DRM functional module and the player are bound, so that the encrypted streaming media data can be played only by using a matched player with the DRM functional module, and the limitation of individual operators is avoided.

Those skilled in the art will appreciate that all or part of the flow of the method implementing the above embodiments may be implemented by a computer program, which is stored in a computer readable storage medium, to instruct related hardware. The computer readable storage medium is a magnetic disk, an optical disk, a read-only memory or a random access memory.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention.

Claims

1. An online streaming media playing method for realizing DRM is characterized by comprising the following steps:

s1, a mobile application of a client sends a play request to a Proxy;

2. The method for online streaming media playback with DRM according to claim 1, wherein the client is an IOS or Android mobile device.

3. The method for online streaming media playing with DRM according to claim 1, wherein the playing request sent by the mobile application to the Proxy server includes a local URL.

4. The DRM enabled online streaming media playing method according to claim 3,

5. The method for playing DRM-enabled online streaming media according to claim 1, wherein the streaming server encrypts data in step S3, including: and dynamically generating a secret key in the program flow by adopting a preset encryption and decryption rule.

6. The method for playing streaming media on-line according to claim 1, wherein in step S4, in case of decryption failure, the Proxy returns information that the decryption failed and cannot be played back to the mobile application.

7. A method for requesting playing of online streaming media through a content distribution network is characterized by comprising the following steps:

s1, a mobile application of a client sends a play request to a Proxy;

8. A method for realizing DRM stream media download and off-line play comprises two processes of data download and off-line play, and is characterized in that the data download process comprises the following steps:

the off-line playing process of the data comprises the following steps:

the Proxy end reads the encrypted data stored in the local equipment;

9. The method for downloading and playing back streaming media with DRM according to claim 8, wherein the Proxy agent stores the private key to the local device while storing the re-encrypted file to the local device.