CN104661109B - Method, system and terminal for hiding media URI in CDN - Google Patents

Abstract

The disclosure relates to a method, a system and a terminal for hiding a media URI in a CDN. The method comprises the steps of requesting a play address of a medium to be played to a play address generation module; receiving the encrypted playing address, and forwarding the encrypted playing address to the CDN through a playing list request; receiving a playlist file returned by the CDN, wherein the playlist file comprises encrypted URI of each fragment of the requested media; requesting a media file from the CDN, wherein the request for the media file comprises encrypted URI of each fragment of the requested media; and receiving the media file returned by the CDN. The present disclosure may hide the media URI when the HAS mechanism is employed.

Description

Method, system and terminal for hiding media URI in CDN

technical field

The present disclosure relates to the field of triple network integration, and in particular, relates to a media URI (Uniform Resource Identifier, Uniform Resource Identifier) in a CDN (Content Delivery Network, content distribution network) based on the HAS (HTTP Adaptive Streaming, HTTP Adaptive Streaming Media) mechanism. ) method, system and user terminal for hiding.

Background technique

In recent years, Internet video has developed rapidly, and video content traffic has accounted for half of the entire Internet traffic. When it comes to Internet video, streaming media technology has to be mentioned. It is the continuous development of streaming media technology that promotes the rapid development of Internet video.

There are two main categories of traditional media content distribution technologies, one is connection-oriented streaming media technology represented by RTSP (Real Time Streaming Protocol)/RTP (Real Time Transfer Protocol, real-time transport protocol), and the other is One type is the connectionless HTTP progressive download adopted by mainstream video websites at present.

The so-called progressive download means that the terminal player can start playing the media before the entire media file is downloaded. If both the client and the server support HTTP1. Pick a point in time to start playing.

However, both traditional media content distribution technology and HTTP progressive download technology have certain defects. At this time, HAS technology came into being. It combines the advantages of traditional RTSP/RTP streaming media technology and HTTP-based progressive download technology. , scalability and strong compatibility.

HAS technology combines the traditional streaming media technology and the characteristics of HTTP progressive download and playback, and transmits media content to users in the form of HTTP. The adoption of this technology can greatly improve the user's media playback experience, and at the same time, this technology reduces the overhead of the head-end server. technical complexity. The transmission method based on HTTP improves the penetration capability of media content in network devices, and this technology has become the development trend of the streaming video industry.

HAS technology is a hybrid media distribution method, and the user experience is a streaming method, but in fact, the HTTP protocol is used to complete the download and distribution of content just like the HTTP progressive download method, but these media contents are all cut into one A series of media blocks are transmitted, which is a key technology of HAS. The time length of each block is the same, generally 2 to 10 seconds.

The media chunks are stored in the HTTP web server. The client requests the media chunks from the web server in a linear manner, and downloads the media chunks in the traditional HTTP way. When the media chunks are downloaded to the client, the client follows the Plays the sequence of media chunks sequentially. Because these media blocks are coded according to the agreed rules, there is no content overlap or discontinuity among the various media blocks, and for the user, a seamless and smooth playback effect is seen.

It should be pointed out that the network video service uses the CDN to transmit media files to a large number of user terminals. During the service process, the CDN needs to hide the real URI of the media files from the user terminals to prevent hotlinking.

In the HAS mechanism, the client accesses the corresponding media file through the address of the media file contained in the playlist file. However, in the anti-leech mechanism of the existing telecom operators, only the address of the playlist file is encrypted, and the playlist file cannot be encrypted. Encrypt the media file address contained in . Therefore, under this mechanism, the existing anti-leeching mechanism of the telecom operator cannot hide the URI of the media file in the CDN.

Contents of the invention

The present disclosure proposes a new technical solution in view of at least one of the above problems.

In one aspect, the present disclosure provides a method for hiding the media URI in the CDN based on the HAS mechanism, which can hide the media URI when the HAS mechanism is adopted.

Another aspect of the present disclosure provides a user terminal, which can hide the media URI when using the HAS mechanism.

In yet another aspect, the present disclosure provides a system for hiding media URIs in a CDN based on the HAS mechanism, which can hide the media URIs when the HAS mechanism is used.

According to the present disclosure, a method for hiding media URIs in a CDN based on an HAS mechanism is provided, including:

Request the playback address of the media to be played to the playback address generation module;

Receive the encrypted playback address, and forward the encrypted playback address to CDN through the playlist request;

Receiving the playlist file returned by the CDN, wherein the playlist file contains encrypted URIs of each segment of the requested media;

Request the media file from the CDN, and the request for the media file includes the encrypted URI of each segment of the requested media;

Receive media files returned by CDN.

In some embodiments of the present disclosure, the method also includes:

After receiving the encrypted playback address, the CDN sends the corresponding encrypted URI to the user terminal according to the encrypted playback address.

In some embodiments of the present disclosure, the step of sending the corresponding encrypted URI to the user terminal according to the encrypted playback address includes:

Decrypt the encrypted playback address;

Encrypt the URIs of the media fragments contained in the playlist file corresponding to the decrypted playback address;

A playlist file containing encrypted URIs of each segment of the requested media is generated and sent to the user terminal.

In some embodiments of the present disclosure, the method also includes:

After the CDN receives the request for the media file, it decrypts the URI of each fragment contained therein;

And send the media segment corresponding to the decrypted URI to the user terminal.

According to the present disclosure, a user terminal is also provided, including:

A playback address request unit is used to request the playback address of the media to be played to the playback address generation module;

The playback address forwarding unit is used to receive the encrypted playback address, and forward the encrypted playback address to the CDN through the playlist request;

The list file receiving unit is used to receive the playlist file returned by the CDN, wherein the playlist file contains the encrypted URI of each segment of the requested media;

The media file request unit is used to request the media file from the CDN, and the request for the media file includes the encrypted URI of each segment of the requested media;

The media file receiving unit is configured to receive the media file returned by the CDN.

According to the present disclosure, there is also provided a system for hiding the media URI in the CDN based on the HAS mechanism, including the CDN, the playback address generation module and the user terminal of the foregoing embodiments.

In some embodiments of the present disclosure, the CDN includes:

The URI encryption unit is configured to send the corresponding encrypted URI to the user terminal according to the encrypted playback address.

In some embodiments of the present disclosure, the URI encryption unit includes:

The address decryption subunit is used to decrypt the encrypted playback address;

The encryption subunit is used to encrypt the URIs of the media fragments contained in the playlist file corresponding to the decrypted playback address;

The list file generation subunit is used to generate a playlist file containing the encrypted URI of each segment of the requested media and send it to the user terminal.

In some embodiments of the present disclosure, the CDN also includes:

The URI decryption unit is used to decrypt the URI of each fragment contained therein;

The media fragment sending unit is configured to send the media fragment corresponding to the decrypted URI to the user terminal.

In the technical solution of the present disclosure, since the CDN encrypts the URI corresponding to each segment of the media file, and sends the encrypted URI to the user terminal in the form of a playlist file, the user terminal can only watch to encrypted URIs, thereby preventing theft of media file links.

Description of drawings

The accompanying drawings described herein are included to provide a further understanding of the disclosure, and constitute a part of this application. In the attached picture:

Fig. 1 is a schematic flowchart of a method for hiding a media URI in a CDN based on an HAS mechanism according to an embodiment of the present disclosure.

Fig. 2 is a schematic flowchart of a method for hiding a media URI in a CDN based on an HAS mechanism according to another embodiment of the present disclosure.

Fig. 3 is a schematic structural diagram of a user terminal according to an embodiment of the present disclosure.

Fig. 4 is a schematic structural diagram of a system for hiding media URIs in a CDN based on an HAS mechanism according to an embodiment of the present disclosure.

Fig. 5 is a schematic structural diagram of a system for hiding media URIs in a CDN based on an HAS mechanism according to another embodiment of the present disclosure.

Fig. 6 is a schematic structural diagram of a system for hiding media URIs in a CDN based on an HAS mechanism according to another embodiment of the present disclosure.

Detailed ways

The present disclosure will be described below with reference to the accompanying drawings. It is to be noted that the following description is merely explanatory and exemplary in nature, and in no way serves as any limitation of the present disclosure, its application or uses. Relative arrangements of components and steps and numerical expressions and numerical values set forth in the embodiments do not limit the scope of the present disclosure unless otherwise specifically stated. Additionally, techniques, methods and devices known to those skilled in the art may not be discussed in detail but are intended to be part of the description where appropriate.

The following embodiments of the present disclosure provide a technical solution for hiding the media URI in the CDN during the network video service based on the HAS mechanism. In this technical solution, when the CDN transmits the playlist file to the user terminal, it encrypts the media URI contained in it, and when the user terminal requests media content, the CDN decrypts the media URI, and then uses the above method to face the user terminal. Hide the real URI of the media file in the CDN.

Fig. 1 is a schematic flowchart of a method for hiding a media URI in a CDN based on an HAS mechanism according to an embodiment of the present disclosure.

As shown in Figure 1, this embodiment may include the following steps:

S102, request the playback address of the media to be played from the playback address generation module;

Specifically, when the user terminal wants to request to play a certain media file, it first needs to request the playback address of the media file to be played from the playback address generation module on the network side.

S104, receiving the encrypted playback address, and forwarding the encrypted playback address to the CDN through the playlist request;

Specifically, the playback address generating module queries the playback address corresponding to the media file according to the requested media file, and encrypts the playback address and sends it to the user terminal. After receiving the encrypted playback address, the user terminal directly carries the encrypted playback address in the playlist request and sends it to the CDN.

S106, receiving the playlist file returned by the CDN, wherein the playlist file contains encrypted URIs of each segment of the requested media;

Specifically, after receiving the playlist request, the CDN generates a playlist file according to the encrypted playback address and returns it to the user terminal.

S108, requesting the media file from the CDN, where the request for the media file includes the encrypted URI of each segment of the requested media;

Specifically, after receiving the playlist file, the user terminal sends a media file request to the CDN, and the request includes the encrypted media URI sent by the CDN to the user terminal.

S110, receiving the media file returned by the CDN;

Specifically, after the user terminal sends the media file request to the CDN, the CDN extracts the encrypted media URI, decrypts it, obtains the corresponding media file according to the decrypted URI, and sends it to the user terminal.

In this embodiment, since the CDN encrypts the URI corresponding to each segment of the media file separately, and sends the encrypted URI to the user terminal in the form of a playlist file, the user terminal can only see the encrypted URI, thereby preventing the theft of media file links.

Further, after step S104, the user terminal forwards the encrypted playback address to the CDN, and after receiving the encrypted playback address, the CDN sends the corresponding encrypted URI to the user terminal according to the encrypted playback address.

Specifically, the step of sending the corresponding encrypted URI to the user terminal according to the encrypted playback address may include:

To decrypt the encrypted playback address, it should be pointed out that the CDN and the playback address generation module have agreed in advance on the key for encrypting and decrypting the playback address, so that the CDN can correctly decrypt the encrypted playback address after receiving it. play address;

Encrypt the URIs of the media fragments contained in the playlist file corresponding to the decrypted playback address;

A playlist file containing encrypted URIs of each segment of the requested media is generated and sent to the user terminal.

Further, after the step S108, after receiving the request for the media file, the CDN decrypts the URIs of each segment contained therein;

And send the media segment corresponding to the decrypted URI to the user terminal.

Fig. 2 is a schematic flowchart of a method for hiding a media URI in a CDN based on an HAS mechanism according to another embodiment of the present disclosure.

As shown in Figure 2, what it describes is based on the CDN anti-leeching process in the network video service of the present disclosure. In this process, the media URI in the playlist file is encrypted by the CDN, and then the CDN requests the user's media file Decryption is a closed-loop encryption and decryption process for the CDN, which hides the real URI of the media file in the CDN from the user terminal.

As shown in Figure 2, this embodiment may include the following steps:

S202, the user terminal requests the playback address from the playback address generation component;

S204, the playback address generating module generates an encrypted playback address;

S206, the playback address generating module returns the encrypted playback address to the user terminal;

S208, the user terminal requests the CDN to play the content according to the encrypted playback address, that is, the user terminal carries the encrypted playback address in the request for the playlist file and forwards it to the CDN;

S210, according to the encryption and decryption key agreed in advance between the CDN and the broadcast address generating module, the CDN decrypts the broadcast address;

S212, the CDN generates a playlist file that includes an encrypted media URI. Specifically, the CDN decrypts the received playback address to obtain the real playback address, and the CDN uses the media files contained in the corresponding playlist file in the real playback address. Encrypt the URI to generate a playlist file containing the URI of the encrypted media file;

S214, the CDN returns the generated playlist file as the user terminal;

S216, the user terminal requests the media content from the CDN according to the playlist file;

S218, the CDN decrypts the media URI included in the media content request;

S220, the CDN returns the media content corresponding to the decrypted media URI to the user terminal.

Those of ordinary skill in the art can understand that all and part of the steps for realizing the above-mentioned method embodiments can be completed by hardware related to program instructions. The aforementioned program can be stored in a computing device readable storage medium. When the program is executed, Execution includes the steps of the above method embodiments, and the aforementioned storage medium may include various media capable of storing program codes such as ROM, RAM, magnetic disk, and optical disk.

Fig. 3 is a schematic structural diagram of a user terminal according to an embodiment of the present disclosure.

As shown in FIG. 3 , the terminal 30 in this embodiment may include a playback address requesting unit 302 , a playback address forwarding unit 304 , a list file receiving unit 306 , a media file requesting unit 308 and a media file receiving unit 310 . in,

Playing address requesting unit 302, is used for requesting the playing address of media to be played to broadcasting address generation module;

The play address forwarding unit 304 is used to receive the encrypted play address, and forward the encrypted play address to the CDN through the play list request;

The list file receiving unit 306 is used to receive the playlist file returned by the CDN, wherein the playlist file contains the URI of each segment of the requested media encrypted;

The media file request unit 308 is configured to request the media file from the CDN, and the request for the media file includes the encrypted URI of each segment of the requested media;

The media file receiving unit 310 is configured to receive the media file returned by the CDN.

In this embodiment, since the CDN encrypts the URI corresponding to each segment of the media file separately, and sends the encrypted URI to the user terminal in the form of a playlist file, the user terminal can only see the encrypted URI, thereby preventing the theft of media file links.

Fig. 4 is a schematic structural diagram of a system for hiding media URIs in a CDN based on an HAS mechanism according to an embodiment of the present disclosure.

As shown in FIG. 4 , the system 40 in this embodiment may include a CDN 402 , a playback address generating module 404 and a user terminal 406 . Wherein, the user terminal 406 may be implemented through the aforementioned embodiments.

Fig. 5 is a schematic structural diagram of a system for hiding media URIs in a CDN based on an HAS mechanism according to another embodiment of the present disclosure.

As shown in FIG. 5, compared with the embodiment in FIG. 4, the CDN 502 in the system 50 in this embodiment may include:

The URI encryption unit 502a is configured to send the corresponding encrypted URI to the user terminal according to the encrypted playback address.

Further, the URI encryption unit may include an address decryption subunit, an encryption subunit and a list file generation subunit. in,

The address decryption subunit is used to decrypt the encrypted playback address;

The encryption subunit is used to encrypt the URIs of the media fragments contained in the playlist file corresponding to the decrypted playback address;

The list file generating subunit is configured to generate a playlist file containing encrypted URIs of each segment of the requested media and send it to the user terminal.

Fig. 6 is a schematic structural diagram of a system for hiding media URIs in a CDN based on an HAS mechanism according to another embodiment of the present disclosure.

As shown in FIG. 6, compared with the embodiment in FIG. 5, the CDN 602 in the system 60 in this embodiment may further include a URI decryption unit 602a and a media fragment sending unit 602b. in,

The URI decryption unit 602a is configured to decrypt the URI of each fragment contained therein;

The media segment sending unit 602b is configured to send the media segment corresponding to the decrypted URI to the user terminal.

Each embodiment in this specification is described in a progressive manner, each embodiment focuses on the difference from other embodiments, and the same and similar parts of each embodiment can be referred to each other. As for the device embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and for related details, please refer to the description of the method embodiment.

It should be pointed out that the above-mentioned embodiments of the present disclosure are applicable to the network video service based on the HAS mechanism, which can effectively hide the media URL in the CDN by video, so as to improve the security of the CDN.

While the present disclosure has been described with reference to exemplary embodiments, it is to be understood that the present disclosure is not limited to the above-described exemplary embodiments. It will be apparent to those skilled in the art that the above-described exemplary embodiments can be modified without departing from the scope and spirit of the present disclosure. The scope of the appended claims should be given the broadest interpretation to encompass all such modifications and equivalent structures and functions.

Claims (5)

1. A method for hiding a media URI in a CDN based on a HAS mechanism is characterized by comprising the following steps:

requesting a playing address of a medium to be played from a playing address generating module;

receiving an encrypted playing address, and forwarding the encrypted playing address to the CDN through a playing list request, wherein the CDN decrypts the encrypted playing address after receiving the encrypted playing address; encrypting the URI of each media fragment contained in the playlist file corresponding to the decrypted play address; generating a playlist file containing encrypted URI of each fragment of the requested media and sending the playlist file to the user terminal;

receiving a playlist file returned by the CDN, wherein the playlist file contains encrypted URI of each fragment of the requested media;

requesting a media file from the CDN, wherein the request for the media file comprises encrypted URI of each fragment of the requested media;

and receiving the media file returned by the CDN.

2. The HAS mechanism-based method for hiding media URIs within CDNs according to claim 1, further comprising:

after receiving the request for the media file, the CDN decrypts the URI of each fragment contained in the request;

and sending the media fragment corresponding to the decrypted URI to the user terminal.

3. A user terminal, comprising:

a play address request unit, configured to request a play address of a media to be played from the play address generation module;

the CDN comprises a play address forwarding unit, a CDN, a play list sending unit and a play address forwarding unit, wherein the play address forwarding unit is used for receiving an encrypted play address and forwarding the encrypted play address to the CDN through a play list request, and the CDN decrypts the encrypted play address after receiving the encrypted play address; encrypting the URI of each media fragment contained in the playlist file corresponding to the decrypted play address; generating a playlist file containing encrypted URI of each fragment of the requested media and sending the playlist file to the user terminal;

a playlist file receiving unit, configured to receive a playlist file returned by the CDN, where the playlist file includes URIs of encrypted pieces of the requested media;

a media file request unit, configured to request a media file from the CDN, where the request for the media file includes encrypted URIs of segments of the requested media;

and the media file receiving unit is used for receiving the media file returned by the CDN.

4. A system for hiding a media URI in a CDN based on a HAS mechanism, comprising the CDN, a play address generation module, and the user terminal of claim 3;

wherein, the URI encryption unit of the CDN comprises:

the address decryption subunit is used for decrypting the encrypted playing address;

the encryption subunit is used for encrypting the URI of each media fragment contained in the playlist file corresponding to the decrypted playing address;

and the list file generating subunit is used for generating a play list file containing the encrypted URI of each fragment of the requested media and sending the play list file to the user terminal.

5. The system for hiding media URIs within a CDN in accordance with the HAS mechanism of claim 4 wherein said CDN further comprises:

a URI decryption unit used for decrypting the URI of each fragment contained in the request of the media file;

and the media fragment sending unit is used for sending the media fragment corresponding to the decrypted URI to the user terminal.