WO2014114086A1 - 超文本传输协议直播流内容分发方法、系统及设备 - Google Patents

超文本传输协议直播流内容分发方法、系统及设备 Download PDF

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Publication number
WO2014114086A1
WO2014114086A1 PCT/CN2013/082947 CN2013082947W WO2014114086A1 WO 2014114086 A1 WO2014114086 A1 WO 2014114086A1 CN 2013082947 W CN2013082947 W CN 2013082947W WO 2014114086 A1 WO2014114086 A1 WO 2014114086A1
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Prior art keywords
content
user terminal
request url
content request
cid
Prior art date
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PCT/CN2013/082947
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English (en)
French (fr)
Inventor
马忠成
Original Assignee
中兴通讯股份有限公司
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Publication of WO2014114086A1 publication Critical patent/WO2014114086A1/zh

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/47—End-user applications
    • H04N21/478—Supplemental services, e.g. displaying phone caller identification, shopping application
    • H04N21/4788—Supplemental services, e.g. displaying phone caller identification, shopping application communicating with other users, e.g. chatting
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L67/00—Network arrangements or protocols for supporting network services or applications
    • H04L67/01—Protocols
    • H04L67/02—Protocols based on web technology, e.g. hypertext transfer protocol [HTTP]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L67/00—Network arrangements or protocols for supporting network services or applications
    • H04L67/50—Network services
    • H04L67/56—Provisioning of proxy services
    • H04L67/563—Data redirection of data network streams
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/80—Generation or processing of content or additional data by content creator independently of the distribution process; Content per se
    • H04N21/83—Generation or processing of protective or descriptive data associated with content; Content structuring
    • H04N21/835—Generation of protective data, e.g. certificates
    • H04N21/8352—Generation of protective data, e.g. certificates involving content or source identification data, e.g. Unique Material Identifier [UMID]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/80—Generation or processing of content or additional data by content creator independently of the distribution process; Content per se
    • H04N21/83—Generation or processing of protective or descriptive data associated with content; Content structuring
    • H04N21/845—Structuring of content, e.g. decomposing content into time segments
    • H04N21/8456—Structuring of content, e.g. decomposing content into time segments by decomposing the content in the time domain, e.g. in time segments
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/80—Generation or processing of content or additional data by content creator independently of the distribution process; Content per se
    • H04N21/85—Assembly of content; Generation of multimedia applications
    • H04N21/854—Content authoring
    • H04N21/85406—Content authoring involving a specific file format, e.g. MP4 format

Definitions

  • Hypertext transfer protocol live stream content distribution method system and device
  • the present invention relates to a content distribution network (CDN) technology, and in particular, to a Hypertext Transfer Protocol Living Streaming (HLS) content distribution method, system and device.
  • CDN content distribution network
  • HLS Hypertext Transfer Protocol Living Streaming
  • CDN technology adds a new layer of network architecture to the Internet (Internet), and puts the content of the customer site close to the user's network edge CDN node server, so that users can easily obtain the required content, reduce the Internet congestion and improve the Internet.
  • Customer sites respond to user access speeds and are widely used in areas such as IPTV (Internet Protocol Television), mobile streaming media, and Internet video.
  • IPTV Internet Protocol Television
  • mobile streaming media and Internet video.
  • the user terminal first requests the CDN node server for the file name suffix of the file directory as a message, and requests the CDN node server for the media file with the file name suffix ts in the file directory, because the CDN node server cannot be from the user. Parsing the CID of the file directory in the request for the media file sent by the terminal, and the CDN node server of the CDN node server locates the file directory by using the CID and searches for the media file requested by the user terminal, resulting in the The CDN node server cannot request a media file from the upper CDN node server, so that the user terminal cannot obtain the media file for playing. Summary of the invention
  • the main purpose of the embodiments of the present invention is to provide a HLS content distribution method, system, and device, which solves the problem that a user terminal fails to request HLS content from a CDN node server.
  • the embodiment of the present invention provides a method for distributing an HLS content by using a CDN, where the method includes: when determining that the content pointed to by the initial content request unicast resource locator (URL, Uniform Resource Locator) sent by the user terminal is HLS content, redirecting the content
  • the initial content request URL is a URL carrying the initial content request URL pointing to the CID of the content and sent to the user terminal;
  • the content pointed to by the content request URL is obtained according to the CID carried in the content request URL and sent to the user terminal.
  • the method before determining that the content that the initial content request URL sent by the user terminal is the HLS content, the method further includes:
  • the acquiring, by the CID carried in the content request URL, the content that is sent by the content request URL to the user terminal includes:
  • the node server sends a relay request for the content request URL to the content, and transmits the content returned by the superior CDN node server to the user terminal.
  • the method further includes: before the content of the content request URL is obtained by the CID carried by the content request URL and sent to the user terminal, the method further includes: And verifying that the user terminal is a legal user terminal according to the verification information carried by the CID-enabled content request URL.
  • the embodiment of the present invention further provides a CDN node server, where the CDN node server includes: a receiving module, a determining module, a redirection module, a sending module, and an obtaining module.
  • the receiving module is configured to receive the user terminal. Sending an initial content request URL or a content request URL that is sent by the user terminal and carrying a CID;
  • the determining module is configured to determine whether the content indicated by the initial content request URL received by the receiving module is an HLS content
  • the redirection module is configured to, when the judgment result of the judging module is yes, redirect the initial content request URL to a URL that carries the content request URL to the CID of the content;
  • the sending module is configured to send a CID-enabled content request URL that is redirected by the redirection module to the user terminal, and send the content acquired by the acquiring module to the user terminal;
  • the acquiring module is configured to: when the receiving module receives the content request URL carrying the CID sent by the user terminal, acquire the content pointed by the content request URL according to the CID carried by the content request URL.
  • the CDN node server further includes:
  • the parsing module is configured to parse the initial content request URL received by the receiving module, and the determining module is further configured to: when the parsing module parses the HLS identifier, determine that the initial content request URL sent by the user terminal points The content is HLS content.
  • the CDN node server further includes:
  • a storage module configured to store content
  • the obtaining module is further configured to retrieve, according to the CID carried by the content request URL received by the receiving module, the content pointed by the content request URL in the storage module, and not retrieve the content And when a content pointed to by the content request URL is generated, generating a relay request for the content request URL to point to the content;
  • the sending module is further configured to: send the content retrieved by the acquiring module to the user terminal; send a relay request generated by the acquiring module to a CDN node server; and send the content received by the receiving module To the user terminal;
  • the receiving module is further configured to receive content returned by the upper CDN node server.
  • the CDN node server further includes:
  • the verification module is configured to check whether the user terminal is a legal user terminal according to the verification information carried by the CID-enabled content request URL received by the receiving module;
  • the obtaining module is further configured to: when the verification result of the verification module is YES, obtain the content pointed to by the content request URL according to the CID carried by the content providing request URL.
  • the embodiment of the present invention further provides an HLS content distribution system, where the HLS content distribution system includes: a CDN node server and a user terminal;
  • the CDN node server is configured to: when the content pointed to by the initial content request URL sent by the user terminal is HLS content, redirect the initial content request URL to a URL carrying the CID of the initial content request URL to the content and send to the URL Receiving, by the user terminal, the CID-enabled content request URL sent by the user terminal, acquiring the content pointed by the content request URL according to the CID carried by the content request URL, and transmitting the content to the user terminal;
  • the terminal is configured to send an initial content request URL or a content request URL carrying the CID to the CDN node server.
  • the CDN node server includes: a receiving module, a determining module, a redirection module, a sending module, and an obtaining module; each module has the same function as described above.
  • the corresponding CID is determined according to the content pointed to by the URL when the user terminal sends the HLS content, and the determined UID is advertised to the user terminal, and thus, may be sent according to the user terminal.
  • the content request URL carries the CID to get the corresponding inside And sending the user terminal to the user terminal, which avoids the problem that the user terminal cannot request the HLS content from the CDN in the related art; and the content request URL that is sent by the user terminal and carries the CID can also carry the user terminal verification information, thereby being able to carry the user terminal verification information, thereby enabling The validity of the user terminal is verified according to the verification information, and the content request URL sent by the illegal hacking user terminal is shielded, thereby improving security performance.
  • FIG. 1 is a schematic flowchart of an implementation process of a HLS content distribution method according to an embodiment of the present invention
  • FIG. 2 is a schematic structural diagram of a structure of an HLS content distribution system according to an embodiment of the present invention.
  • FIG. 3 is a schematic diagram of an implementation process of HLS content distribution according to an embodiment of the present invention. detailed description
  • FIG. 1 is a schematic flowchart of an implementation method of a HLS content distribution method according to an embodiment of the present invention. As shown in FIG. 1, the method includes:
  • Step 101 Determine, when the content pointed to by the initial content request URL sent by the user terminal is HLS content, redirect the initial content request URL to a URL carrying the CID of the initial content request URL pointing content, and send the URL to the user terminal.
  • the method further includes:
  • the CDN node server parses the initial content request URL sent by the user terminal, and if the HLS identifier is parsed, it determines that the content pointed to by the initial content request URL sent by the user terminal is HLS content.
  • the HLS identifier is carried in the initial content request URL by the user terminal when sending the initial content request URL for the HLS content, so that the initial content request URL can be judged by carrying the HLS identifier. Whether the content pointed to by the initial content request URL sent by the user terminal is HLS content.
  • the CID is used to identify a file directory for storing HLS content, and the files stored in the file directory include an index file with a file name suffix of m3u8 and a media file with a file name suffix ts.
  • the redirected CID-carrying URL may be carried in a Hypertext Transfer Protocol (HTTP) redirect message and sent to the
  • HTTP Hypertext Transfer Protocol
  • the user terminal is configured to carry the content request URL sent by the user terminal to carry the CID.
  • the CDN node server returns the index file index.m3u8 of the CID corresponding file directory in the initial content request URL to the user terminal, an HTTP 302 redirect message is also sent to the user terminal to redirect the initial content.
  • the relative path is obtained, for example, the content request URL sent by the user terminal when subsequently requesting the media file Ol.ts is: http://host/authinfo/cid/01.ts, As such, the content request URL sent by the user terminal still carries the cid field.
  • Step 102 When receiving the CID-enabled content request URL sent by the user terminal, obtain the content pointed by the content request URL according to the CID carried by the content request URL, and send the content to the user terminal.
  • the acquiring, by the CID carried in the content request URL, the content that is sent by the content request URL to the user terminal includes: The CDN node server retrieves, according to the CID carried by the content request URL, whether the content pointed to by the content request URL is locally, and if so, sends the content pointed to by the retrieved content request URL to the user terminal; otherwise, And transmitting, to the upper-level CDN node server, a relay request for the content request URL to the content, and transmitting the content returned by the superior CDN node server to the user terminal.
  • the CDN node server communicates with the upper-level CDN node server through the cascade interface, and when the upper-level CDN node server receives the relay request, the file directory where the CID is located according to the relay request is located, and the retrieved file is returned. Give the subordinate CDN node server.
  • the method further includes: before the acquiring, according to the CID carried by the content request URL, the content that is sent by the content request URL to the user terminal, the method further includes:
  • the CDN node server verifies the user terminal as a legitimate user terminal according to the verification information carried in the content request URL of the CID-carrying content.
  • the processing of the CDN node server to verify that the user terminal is a legitimate user terminal is the same as the user verification process of the CDN node server in the related art: reading the identification information of the user terminal from the verification information, and The location information of the user terminal is retrieved locally, and if retrieved, the user terminal is determined to be a legitimate user terminal.
  • the CDN node server verifies whether the user terminal is a legitimate user terminal according to the request information of the request index file or the content of the media file sent by the user terminal, and verifies the user.
  • the terminal is a legal user terminal
  • the index file or the media file pointed to by the content request URL is obtained according to the CID carried by the content request URL and sent to the user terminal.
  • FIG. 2 is a schematic structural diagram of a HLS content distribution system according to an embodiment of the present invention. As shown in FIG. 2, the system includes: a CDN node server 21 and a user terminal 22;
  • the CDN node server 21 is configured to: when the content pointed to by the initial content request URL sent by the user terminal 22 is HLS content, redirect the initial content request URL to be carried The initial content request URL points to the URL of the CID of the content and is sent to the user terminal 22; when receiving the content request URL carrying the CID sent by the user terminal 22, acquiring the CID according to the CID carried by the content request URL The content pointed to by the content request URL is sent to the user terminal 22;
  • the user terminal 22 is configured to send an initial content request URL or a content request URL carrying a CID to the CDN node server 21.
  • the CDN node server 21 is further configured to receive an initial content request URL sent by the user terminal 22 or a content request URL that carries the CID sent by the user terminal 22; and determine content that the received initial content request URL points to. Whether it is an HLS content; determining whether the content pointed to by the received initial content request URL is HLS content, redirecting the initial content request URL to a URL carrying the content request URL pointing to the CID of the content; The content request URL carrying the CID is sent to the user terminal 22; when receiving the content request URL carrying the CID sent by the user terminal 22, acquiring the content request URL according to the CID carried by the content request URL Content; transmitting the content pointed to by the content request URL acquired by the CID carried according to the content request URL to the user terminal 22.
  • the CDN node server 21 is further configured to parse the received initial content request URL.
  • the HLS identifier is parsed, it is determined that the content pointed to by the initial content request URL sent by the user terminal 22 is HLS content.
  • the CDN node server 21 is further configured to store content; and retrieve, according to the CID carried by the received content request URL, the content pointed by the content request URL in the stored content; And generating a relay request for the content request URL to the content and transmitting the content to the upper CDN node server; receiving the content returned by the superior CDN node server and transmitting the content to the user terminal 22.
  • the CDN node server 21 is further configured to carry according to the received Checking whether the user terminal 22 is legal, and verifying that the user terminal 22 is legal.
  • the content request URL is obtained according to the CID carried by the content request URL. content.
  • the CDN node server 21 includes: a receiving module 211, a determining module 212, a redirecting module 213, a sending module 214, and an earing module 215;
  • the receiving module 211 is configured to receive an initial content request URL sent by the user terminal 22 or a content request URL that is sent by the user terminal 22 and carries a CID;
  • the determining module 212 is configured to determine whether the content pointed to by the initial content request URL received by the receiving module 211 is an HLS content
  • the redirection module 213 is configured to, when the determination result of the determining module 212 is YES, redirect the initial content request URL to a URL that carries the content request URL to the CID of the content;
  • the sending module 214 is configured to send the CID-enabled content request URL redirected by the redirecting module 213 to the user terminal 22, and send the content acquired by the obtained ear module 215 to the user terminal. twenty two;
  • the obtaining module 215 is configured to acquire, according to the CID carried by the content request URL, the content pointed to by the content request URL, when the receiving module 211 receives the content requesting URL that is sent by the user terminal 22 and carries the CID.
  • the CDN node server 21 further includes:
  • the parsing module 216 is configured to parse the initial content request URL received by the receiving module 211;
  • the determining module 212 is further configured to determine that the content pointed to by the initial content request URL sent by the user terminal 22 is HLS content when the parsing module 216 parses the HLS identifier.
  • the CDN node server 21 further includes:
  • the storage module 217 is configured to store content;
  • the obtaining module 215 is further configured to retrieve, according to the CID carried by the content request URL received by the receiving module 211, the content pointed to by the content request URL in the storage module 217, and point to the content request URL without retrieving the content. And generating a relay request for the content request URL to point to the content;
  • the sending module 214 is further configured to send the content retrieved by the obtaining module 215 to the user terminal 22; send the relay request generated by the obtaining module 215 to the upper CDN node server; The content received by 211 is sent to the user terminal 22;
  • the receiving module 211 is further configured to receive a valley returned by the upper CDN node server.
  • the CDN node server 21 further includes:
  • the verification module 218 is configured to check whether the user terminal 22 is a legal user terminal according to the verification information carried by the CID-enabled content request URL received by the receiving module 211.
  • the obtaining module 215 is further configured to When the verification result of the verification module 218 is YES, the inner valley pointed by the content request URL is acquired according to the CID carried by the content providing request URL.
  • the receiving module 211, the determining module 212, the redirecting module 213, the sending module 214, the obtaining module 215, the parsing module 216, and the checking module 218 may all be used by a central processing unit (CPU) in the CDN node server 21.
  • a central processing unit CPU
  • a central processing unit DSP
  • DSP digital signal processor
  • FPGA Field Programmable Gate Array
  • the receiving module 211 and the transmitting module 214 may be combined into a transceiver module;
  • FIG. 3 is a schematic diagram of a process for implementing HLS content distribution according to an embodiment of the present invention. As shown in FIG. 3, the method includes:
  • Step 301 The user terminal sends an initial content request URL to the CDN node server.
  • Step 302 The CDN node server sends a relay request to the upper CDN node server.
  • the CDN node server first requests the index file of the CID corresponding file directory by the upper CDN node server by sending a relay request.
  • the CDN node server locally stores the index file of the CID corresponding file directory, it indicates that the user terminal has sent the same initial content request URL as described in step 301 to the CDN node server before step 301, and the CDN node server is associated.
  • the technology caches the index file of the CID corresponding file directory, and then steps 302 and 303 are skipped, and step 304 is performed.
  • Step 303 The superior CDN node server returns an index file index.m3u8 to the CDN node server.
  • Step 304 The CDN node server sends the redirected CID-carrying URL to the user terminal.
  • the CDN node server first parses the initial content request URL sent by the user terminal, and if the HLS identifier is parsed, determines that the content pointed to by the initial content request URL sent by the user terminal is the HLS content, and performs step 304, which is required to be described.
  • the parsing decision operation may also be performed before step 302 or step 303.
  • the redirected CID-carrying URL is: http://host/cid
  • the CDN node server carries the redirected CID-carrying URL in an HTTP 302 redirect message and sends it to the user terminal.
  • Step 305 The user terminal sends a content request URL carrying the CID to the CDN node server.
  • Step 306 The CDN node server sends the index file index.m3u8 to the user terminal. Before step 306, the CDN node server requests the URL according to the content sent by the user terminal. Checking the carried information to verify whether the user terminal is a legitimate user terminal. If yes, perform the steps.
  • Step 307 The user terminal sends a content request URL carrying the CID to the CDN node server.
  • the user terminal receives the index file sent by the CDN node server in step 306 to read the media file information of the CID corresponding file directory, and modifies and sends the relative path of the content request URL sent in step 305 to the CDN.
  • the node server for example, the content request URL that the user terminal needs to send to the CDN node server when requesting the media file 01.ts is: http://host/auhinfo/cid/01.ts.
  • Step 308 The CDN node server performs legality verification on the user terminal.
  • the CDN node server verifies whether the user terminal is a legitimate user terminal according to the verification information carried in the content request URL sent by the user terminal in step 307. If yes, the step is performed.
  • Step 309 The CDN node server sends a relay request to the upper CDN node server. Before step 309, the CDN node server retrieves whether the media file 01. ts requested by the user terminal is stored locally according to the cid field in the content request URL sent by the user terminal in step 307. If it is retrieved, step 309 and step 310 are skipped, and steps are performed. 311; otherwise, step 309 is performed.
  • Step 310 The upper CDN node server sends the media file 01. ts to the user terminal.
  • the upper CDN node server locates the file directory according to the CID carried by the relay request sent by the CDN node server in step 309, and retrieves the media file 01.ts requested by the CDN node server in the file directory.
  • steps 309 to 310 the interaction between the CDN node server and the upper CDN node server can be completed through the cascade interface.
  • Step 311 The CDN node server sends the media file 01. ts to the user terminal.

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Multimedia (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Computer Security & Cryptography (AREA)
  • General Engineering & Computer Science (AREA)
  • Information Transfer Between Computers (AREA)

Abstract

本发明实施例公开了一种超文本传输协议直播流（HLS）内容分发方法，所述方法包括：重定向初始内容请求统一资源定位符（URL）为携带所述初始内容请求URL指向内容的内容身份标志号码（CID）的URL并发送至用户终端；根据所述用户终端发送的内容请求URL携带的CID获取所述内容请求URL指向的内容并发送至所述用户终端。本发明实施例还公开了一种HLS内容分发系统及设备，采用本发明实施例的技术方案，避免了用户终端向内容分发网络（CDN）网络请求媒体文件失败的问题，还可对用户终端进行合法性校验，提高了安全性能。

Description

超文本传输协议直播流内容分发方法、 系统及设备 技术领域
本发明涉及内容分发网络（ CDN, Content Distribute Network )技术， 尤其涉及一超文本传输协议直播流（ HLS, HyperText Transfer Protocol Living Streaming ) 内容分发方法、 系统及设备。 背景技术
CDN技术在因特网 （Internet ) 中增加一层新的网络架构， 将客户站点 内容放到靠近用户的网络边缘 CDN节点服务器，使用户可以方便地获得所 需的内容， 减轻了因特网拥塞状况， 提高了客户站点响应用户访问的速度， 已广泛应用在交互式网络电视（ IPTV , Internet Protocol Television )、 移动流 媒体和互联网视频等业务领域。
目前， 当基于 HLS的用户终端向 CDN节点服务器请求内容身份标志 号码（ CID, Content Identity )对应目录的 HLS内容以进行播放时， 存在以 下问题：
用户终端首先向 CDN 节点服务器请求所述文件目录的文件名后缀为 息，并向 CDN节点服务器请求所述文件目录中文件名后缀为 ts的媒体文件， 由于所述 CDN节点服务器无法从所述用户终端发送的针对媒体文件的请求 中解析出所述文件目录的 CID, 且所述 CDN节点服务器的上级 CDN节点 服务器是以所述 CID定位文件目录并查找用户终端请求的媒体文件的， 导 致所述 CDN节点服务器无法向上级 CDN节点服务器请求到媒体文件， 从 而用户终端无法获取媒体文件进行播放。 发明内容
有鉴于此，本发明实施例的主要目的在于提供一种 HLS内容分发方法、 系统及设备， 解决用户终端向 CDN节点服务器请求 HLS内容失败的问题。
为达到上述目的， 本发明实施例的技术方案是这样实现的：
本发明实施例提供了一种 CDN分发 HLS内容方法， 所述方法包括： 确定用户终端发送的初始内容请求统一资源定位符 （ URL, Uniform Resource Locator )指向的内容为 HLS 内容时， 重定向所述初始内容请求 URL为携带所述初始内容请求 URL指向内容的 CID的 URL并发送至所述 用户终端；
接收到所述用户终端发送的携带 CID的内容请求 URL时，根据所述内 容请求 URL携带的 CID获取所述内容请求 URL指向的内容并发送至所述 用户终端。
优选地， 确定用户终端发送的初始内容请求 URL指向的内容为 HLS 内容之前， 所述方法还包括：
解析所述用户终端发送的初始内容请求 URL, 如果解析出 HLS标识， 则确定用户终端发送的初始内容请求 URL指向的内容为 HLS内容。
优选地， 所述根据内容请求 URL携带的 CID获取所述内容请求 URL 指向的内容并发送至所述用户终端， 包括：
根据所述内容请求 URL携带的 CID检索本地是否有所述内容请求 URL 指向的内容， 如果有， 则将检索到的所述内容请求 URL指向的内容发送至 所述用户终端； 否则， 向上级 CDN节点服务器发送针对所述内容请求 URL 指向内容的中继请求， 并将所述上级 CDN节点服务器返回的内容发送至所 述用户终端。
优选地， 所述根据内容请求 URL携带的 CID获取所述内容请求 URL 指向的内容并发送至所述用户终端之前， 所述方法还包括： 根据所述携带 CID的内容请求 URL携带的校验信息，校验所述用户终 端为合法用户终端。
本发明实施例还提供了一种 CDN节点服务器， 所述 CDN节点服务器 包括： 接收模块、 判断模块、 重定向模块、 发送模块和获取模块； 其中， 所述接收模块， 配置为接收所述用户终端发送的初始内容请求 URL或 所述用户终端发送的携带 CID的内容请求 URL;
所述判断模块， 配置为判断所述接收模块接收的初始内容请求 URL指 向的内容是否为 HLS内容；
所述重定向模块， 配置为在所述判断模块的判断结果为是时， 将所述 初始内容请求 URL重定向为携带所述内容请求 URL指向内容的 CID的 URL;
所述发送模块， 配置为将所述重定向模块重定向的携带 CID的内容请 求 URL发送至所述用户终端； 将所述获取模块获取的内容发送至所述用户 终端；
所述获取模块， 配置为在所述接收模块接收到所述用户终端发送的携 带 CID的内容请求 URL时， 根据所述内容请求 URL携带的 CID获取所述 内容请求 URL指向的内容。
优选地， 所述 CDN节点服务器还包括：
解析模块， 配置为解析所述接收模块接收到的初始内容请求 URL; 所述判断模块， 还配置为在所述解析模块解析出 HLS标识时， 判定所 述用户终端发送的初始内容请求 URL指向的内容为 HLS内容。
优选地， 所述 CDN节点服务器还包括：
存储模块， 配置为存储内容；
所述获取模块， 还配置为根据所述接收模块接收的内容请求 URL携带 的 CID在所述存储模块检索所述内容请求 URL指向的内容，并在没有检索 到所述内容请求 URL指向的内容时， 生成针对所述内容请求 URL指向内 容的中继请求；
所述发送模块， 还配置为将所述获取模块检索到的内容发送至所述用 户终端； 将所述获取模块生成的中继请求发送至上级 CDN节点服务器； 将 所述接收模块接收的内容发送至所述用户终端；
所述接收模块， 还配置为接收所述上级 CDN节点服务器返回的内容。 优选地， 所述 CDN节点服务器还包括：
校验模块， 配置为根据所述接收模块接收到的携带 CID 的内容请求 URL携带的校验信息， 校验所述用户终端是否为合法用户终端；
所述获取模块， 还配置为在所述校验模块的校验结果为是时， 根据所 述内容提供请求 URL携带的 CID获取所述内容请求 URL指向的内容。
本发明实施例还提供了一种 HLS内容分发系统，所述 HLS内容分发系 统包括： CDN节点服务器和用户终端； 其中，
所述 CDN节点服务器，配置为确定用户终端发送的初始内容请求 URL 指向的内容为 HLS内容时，重定向所述初始内容请求 URL为携带所述初始 内容请求 URL指向内容的 CID的 URL并发送至所述用户终端； 接收到所 述用户终端发送的携带 CID的内容请求 URL时， 根据所述内容请求 URL 携带的 CID获取所述内容请求 URL指向的内容并发送至所述用户终端； 所述用户终端，配置为向所述 CDN节点服务器发送初始内容请求 URL 或携带 CID的内容请求 URL。
优选地， 所述 CDN节点服务器包括： 接收模块、 判断模块、 重定向模 块、 发送模块和获取模块； 各模块功能与以上所述相同。
本发明实施例所提供的技术方案， 根据所述用户终端发送 HLS内容时 URL指向的内容确定对应的 CID ,并将所确定的 UID通告给所述用户终端， 如此，可根据所述用户终端发送的内容请求 URL携带的 CID获取相应的内 容并发送至所述用户终端， 避免了相关技术中用户终端无法从 CDN请求 HLS 内容的问题； 并且， 所述用户终端发送的携带 CID的内容请求 URL 还可携带用户终端校验信息， 从而能够根据所述校验信息校验用户终端合 法性， 屏蔽响应非法盗链用户终端发送的内容请求 URL,提升了安全性能。 附图说明
图 1为本发明实施例 HLS内容分发方法的实现流程示意图；
图 2为本发明实施例 HLS内容分发系统的组成结构示意图；
图 3为本发明实施例 HLS内容分发的实现流程示意图。 具体实施方式
下面结合附图及具体实施例对本发明再作进一步详细的说明。
图 1为本发明实施例 HLS内容分发方法的实现流程示意图， 如图 1所 示， 所述方法包括：
步驟 101 : 确定用户终端发送的初始内容请求 URL指向的内容为 HLS 内容时， 重定向所述初始内容请求 URL为携带所述初始内容请求 URL指 向内容的 CID的 URL并发送至所述用户终端。
优选地， 所述确定用户终端发送的初始内容请求 URL指向的内容为 HLS内容之前， 还包括：
CDN节点服务器解析所述用户终端发送的初始内容请求 URL,如果解 析出 HLS标识， 则确定用户终端发送的初始内容请求 URL指向的内容为 HLS内容。
其中，所述 HLS标识由所述用户终端在发送针对 HLS内容的初始内容 请求 URL时， 携带在所述初始内容请求 URL中， 如此， 可通过解析所述 初始内容请求 URL是否携带 HLS标识来判断所述用户终端发送的初始内容 请求 URL指向的内容是否为 HLS内容。 其中， 所述 CID用来标识存储 HLS内容的文件目录， 所述文件目录存 储的文件包括文件名后缀为 m3u8的索引文件和文件名后缀为 ts的媒体文 件。
其中， 当所述用户终端向 CDN节点服务器发送初始内容请求 URL时， 可以将所述重定向的携带 CID 的 URL携带在超文本传输协议（HTTP, HyperText Transfer Protocol ) 302重定向消息中并发送至所述用户终端， 以 使所述用户终端后续发送的内容请求 URL携带所述 CID。
例如， 假设所述用户终端向 CDN节点服务器发送初始内容请求 URL 为： http://host/cid?authinfo=x, 其中， 所述初始内容请求 URL中 cid字段为 CID, authinfo字段为校验信息， 则 CDN节点服务器向所述用户终端返回 所述初始内容请求 URL 中 CID对应文件目录的索引文件 index.m3u8之前， 还将向所述用户终端发送 HTTP 302重定向消息以重定向所述初始内容请 求 URL为： http://host/cid/index.m3u8/?authinfo=x, 如此， 所述用户终端将 重新发送内容请求 URL 以请求索引文件 index.m3u8： http://host/cid /index.m3u8/?authinfo=x , 并且， 所述用户终端后续发送内容请求 URL以请 求文件名后缀为 ts的媒体文件时，所述后续发送的内容请求 URL通过修改 所述重新发送的内容请求 URL中的相对路径得到， 例如， 所述用户终端后 续 请 求 媒体 文件 Ol.ts 时 发 送 的 内 容请 求 URL 为 ： http://host/authinfo/cid/01.ts , 如此， 所述用户终端后续发送的内容请求 URL 仍然携带所述 cid字段。
步驟 102: 接收到所述用户终端发送的携带 CID的内容请求 URL时， 根据所述内容请求 URL携带的 CID获取所述内容请求 URL指向的内容并 发送至所述用户终端。
优选地， 所述根据内容请求 URL携带的 CID获取所述内容请求 URL 指向的内容并发送至所述用户终端， 包括： CDN节点服务器根据所述内容请求 URL携带的 CID检索本地是否有 所述内容请求 URL指向的内容， 如果有， 则将检索到的所述内容请求 URL 指向的内容发送至所述用户终端； 否则， 向上级 CDN节点服务器发送针对 所述内容请求 URL指向内容的中继请求， 并将所述上级 CDN节点服务器 返回的内容发送至所述用户终端。
其中， CDN节点服务器与上级 CDN节点服务器通过级联接口通信， 上级 CDN节点服务器接收到中继请求时，根据所述中继请求携带的 CID定 位文件所在的文件目录，并将检索到的文件返回给下级的 CDN节点服务器。
优选地， 所述根据内容请求 URL携带的 CID获取所述内容请求 URL 指向的内容并发送至所述用户终端之前， 所述方法还包括：
CDN节点服务器根据所述携带 CID的内容请求 URL携带的校验信息， 校验所述用户终端为合法用户终端。
其中，所述 CDN节点服务器校验所述用户终端为合法用户终端的处理 与相关技术中 CDN节点服务器的用户校验处理相同：从所述校验信息读取 所述用户终端的标识信息， 并在本地检索是否有所述用户终端的标识信息， 如果检索到， 则确定所述用户终端为合法用户终端。
其中， 所述 CDN节点服务器根据所述用户终端发送的请求索引文件或 媒体文件的内容请求 URL携带的校验信息， 校验所述用户终端是否为合法 用户终端， 并在校验出所述用户终端为合法用户终端时， 根据所述内容请 求 URL携带的 CID获取所述内容请求 URL指向的索引文件或媒体文件并 发送至所述用户终端。
图 2为本发明实施例 HLS内容分发系统的组成结构示意图， 如图 2所 示， 所述系统包括： CDN节点服务器 21和用户终端 22; 其中，
所述 CDN节点服务器 21， 配置为确定用户终端 22发送的初始内容请 求 URL指向的内容为 HLS内容时， 重定向所述初始内容请求 URL为携带 所述初始内容请求 URL指向内容的 CID的 URL并发送至所述用户终端 22; 接收到所述用户终端 22发送的携带 CID的内容请求 URL时， 根据所述内 容请求 URL携带的 CID获取所述内容请求 URL指向的内容并发送至所述 用户终端 22;
所述用户终端 22, 配置为向所述 CDN节点服务器 21发送初始内容请 求 URL或携带 CID的内容请求 URL。
优选地， 所述 CDN节点服务器 21 , 还配置为接收所述用户终端 22发 送的初始内容请求 URL或所述用户终端 22发送的携带 CID 的内容请求 URL;判断接收的初始内容请求 URL指向的内容是否为 HLS内容；判断出 接收的初始内容请求 URL指向的内容是否为 HLS内容时，将所述初始内容 请求 URL重定向为携带所述内容请求 URL指向内容的 CID的 URL; 将所 述重定向的携带 CID的内容请求 URL发送至所述用户终端 22; 在接收到 所述用户终端 22发送的携带 CID的内容请求 URL时， 根据所述内容请求 URL携带的 CID获取所述内容请求 URL指向的内容； 将所述根据内容请 求 URL携带的 CID获取的所述内容请求 URL指向的内容发送至所述用户 终端 22。
优选地，所述 CDN节点服务器 21 ,还配置为解析接收到的初始内容请 求 URL; 在解析出 HLS标识时， 判定所述用户终端 22发送的初始内容请 求 URL指向的内容为 HLS内容。
优选地， 所述 CDN节点服务器 21 , 还配置为存储内容； 根据接收的内 容请求 URL携带的 CID在存储的内容中检索所述内容请求 URL指向的内 容； 在没有检索到所述内容请求 URL指向的内容时， 生成针对所述内容请 求 URL指向内容的中继请求并发送至上级 CDN节点服务器； 接收所述上 级 CDN节点服务器返回的内容并发送至所述用户终端 22。
优选地， 所述 CDN节点服务器 21 , 还配置为根据所述接收到的携带 CID的内容请求 URL携带的校验信息， 校验所述用户终端 22是否合法； 在校验出所述用户终端 22合法时， 根据所述内容请求 URL携带的 CID获 取所述内容请求 URL指向的内容。
优选地， 所述 CDN节点服务器 21包括：接收模块 211、判断模块 212、 重定向模块 213、 发送模块 214和获耳 4莫块 215; 其中，
所述接收模块 211 , 配置为接收所述用户终端 22发送的初始内容请求 URL或所述用户终端 22发送的携带 CID的内容请求 URL;
所述判断模块 212,配置为判断所述接收模块 211接收的初始内容请求 URL指向的内容是否为 HLS内容；
所述重定向模块 213, 配置为在所述判断模块 212的判断结果为是时， 将所述初始内容请求 URL重定向为携带所述内容请求 URL指向内容的 CID 的 URL;
所述发送模块 214, 配置为将所述重定向模块 213重定向的携带 CID 的内容请求 URL发送至所述用户终端 22;将所述获耳 4莫块 215获取的内容 发送至所述用户终端 22;
所述获取模块 215, 配置为在所述接收模块 211 接收到所述用户终端 22发送的携带 CID的内容请求 URL时，根据所述内容请求 URL携带的 CID 获取所述内容请求 URL指向的内容。
优选地， 所述 CDN节点服务器 21还包括：
解析模块 216, 配置为解析所述接收模块 211 接收到的初始内容请求 URL;
所述判断模块 212,还配置为在所述解析模块 216解析出 HLS标识时， 判定所述用户终端 22发送的初始内容请求 URL指向的内容为 HLS内容。
优选地， 所述 CDN节点服务器 21还包括：
存储模块 217, 配置为存储内容； 所述获取模块 215, 还配置为根据所述接收模块 211 接收的内容请求 URL携带的 CID在所述存储模块 217检索所述内容请求 URL指向的内容， 并在没有检索到所述内容请求 URL指向的内容时， 生成针对所述内容请求 URL指向内容的中继请求；
所述发送模块 214,还配置为将所述获取模块 215检索到的内容发送至 所述用户终端 22;将所述获取模块 215生成的中继请求发送至上级 CDN节 点服务器； 将所述接收模块 211接收的内容发送至所述用户终端 22;
所述接收模块 211 , 还配置为接收所述上级 CDN节点服务器返回的内 谷。
优选地， 所述 CDN节点服务器 21还包括：
校验模块 218, 配置为根据所述接收模块 211接收到的携带 CID的内 容请求 URL携带的校验信息， 校验所述用户终端 22是否为合法用户终端； 所述获取模块 215 , 还配置为在所述校验模块 218的校验结果为是时， 根据所述内容提供请求 URL携带的 CID获取所述内容请求 URL指向的内 谷。
实际应用中， 所述接收模块 211、 判断模块 212、 重定向模块 213、 发 送模块 214、获取模块 215、解析模块 216和校验模块 218均可由所述 CDN 节点服务器 21中的中央处理器（CPU, Central Processing Unit ), 数字信号 处理器（DSP, Digital Signal Processor )或现场可编程门阵列（FPGA, Field Programmable Gate Array ) 实现； 所述接收模块 211和所述发送模块 214可 以合并为收发模块；
所述存储模块 217可由所述 CDN节点服务器 21中的存储器实现。 图 3为本发明实施例 HLS内容分发的实现流程示意图， 如图 3所示， 包括：
步驟 301: 用户终端向 CDN节点服务器发送初始内容请求 URL。 其中， 所述初始内容请求 URL 为： http://host/cid?authinfo=x, 所述初 始内容请求 URL中 cid字段为 CID, authinfo字段为校验信息。
步驟 302: CDN节点服务器向上级 CDN节点服务器发送中继请求。 其中， CDN节点服务器通过发送中继请求首先向上级 CDN节点服务 器请求所述 CID对应文件目录的索引文件。
其中，若 CDN节点服务器本地存储有所述 CID对应文件目录的索引文 件， 则表示步驟 301之前用户终端已向 CDN节点服务器发送与步驟 301所 述相同的初始内容请求 URL,且 CDN节点服务器按照相关技术緩存了所述 CID对应文件目录的索引文件， 则跳过步驟 302和 303 , 执行步驟 304。
步驟 303: 上级 CDN 节点服务器向 CDN 节点服务器返回索引文件 index.m3u8。
步驟 304: CDN节点服务器向用户终端发送重定向的携带 CID的 URL。 步驟 304之前， CDN节点服务器首先解析用户终端发送的初始内容请 求 URL, 若解析出 HLS标识则判定用户终端发送的初始内容请求 URL指 向的内容为 HLS内容并执行步驟 304, 需要说明的是， 该解析判断操作也 可在步驟 302或步驟 303之前执行。
其中 ， 所述重定向的携带 CID 的 URL 为： http://host/cid
/index.m3u8/?authinfo=x, CDN节点服务器将所述重定向的携带 CID的 URL 携带在 HTTP 302重定向消息中发送至用户终端。
步驟 305:用户终端向 CDN节点服务器发送携带 CID的内容请求 URL。 其中， 用户终端通过发送携带所述 CID 的内容请求 URL : http://host/cid/index.m3u8/?authinfo=x, 以向 CDN节点服务器请求索引文件 index.m3u8。
步驟 306: CDN节点服务器发送索引文件 index.m3u8至用户终端。 步驟 306之前， CDN节点服务器根据用户终端发送的内容请求 URL 携带的校验信息校验用户终端是否为合法用户终端， 如果是， 则执行步驟
306; 否则， 停止处理。
步驟 307:用户终端向 CDN节点服务器发送携带 CID的内容请求 URL。 其中，用户终端接收步驟 306中 CDN节点服务器发送的索引文件以读 取所述 CID对应文件目录的媒体文件信息， 并将步驟 305中发送的内容请 求 URL的相对路径进行修改并发送至所述 CDN节点服务器， 例如， 用户 终端需要向 CDN节点服务器请求媒体文件 01. ts时发送的内容请求 URL为： http://host/auhinfo/cid/01.ts。
步驟 308: CDN节点服务器对用户终端做合法性校验。
其中， CDN节点服务器根据步驟 307中用户终端发送的内容请求 URL 携带的校验信息校验用户终端是否为合法用户终端， 如果是， 则执行步驟
309; 否则， 停止处理。
步驟 309: CDN节点服务器向上级 CDN节点服务器发送中继请求。 步驟 309之前， CDN节点服务器根据步驟 307中用户终端发送的内容 请求 URL中 cid字段检索本地是否存储用户终端请求的媒体文件 01. ts, 如 果检索到，则跳过步驟 309和步驟 310,执行步驟 311;否则，执行步驟 309。
步驟 310: 上级 CDN节点服务器发送媒体文件 01. ts至用户终端。
其中， 上级 CDN节点服务器根据步驟 309中 CDN节点服务器发送的 中继请求携带的 CID定位文件目录，并在所述文件目录检索 CDN节点服务 器请求的媒体文件 01.ts。
步驟 309 ~步驟 310中， CDN节点服务器和上级 CDN节点服务器的交 互操作可以通过级联接口完成。
步驟 311: CDN节点服务器发送媒体文件 01. ts至用户终端。
用户终端后续请求所述 CID对应文件目录中其他媒体文件的操作与步 驟 307〜步驟 311相同， 不再赘述。 以上所述， 仅为本发明的较佳实施例而已， 并非用于限定本发明的保 护范围。

Claims

权利要求书
1、 一种超文本传输协议直播流 HLS内容分发方法， 所述方法包括： 确定用户终端发送的初始内容请求统一资源定位符 URL指向的内容为
HLS内容时，重定向所述初始内容请求 URL为携带所述初始内容请求 URL 指向内容的内容身份标志号码 CID的 URL并发送至所述用户终端；
接收到所述用户终端发送的携带 CID的内容请求 URL时，根据所述内 容请求 URL携带的 CID获取所述内容请求 URL指向的内容并发送至所述 用户终端。
2、 根据权利要求 1所述的方法， 其中， 所述确定用户终端发送的初始 内容请求 URL指向的内容为 HLS内容之前， 所述方法还包括：
解析所述用户终端发送的初始内容请求 URL, 如果解析出 HLS标识， 则确定用户终端发送的初始内容请求 URL指向的内容为 HLS内容。
3、 根据权利要求 1 所述的方法， 其中， 所述根据所述内容请求 URL 携带的 CID获取所述内容请求 URL指向的内容并发送至所述用户终端，包 括：
根据所述内容请求 URL携带的 CID检索本地是否有所述内容请求 URL 指向的内容， 如果有， 则将检索到的所述内容请求 URL指向的内容发送至 所述用户终端； 否则， 向上级 CDN节点服务器发送针对所述内容请求 URL 指向内容的中继请求， 并将所述上级 CDN节点服务器返回的内容发送至所 述用户终端。
4、 根据权利要求 1、 2或 3所述的方法， 其中， 所述根据所述内容请 求 URL携带的 CID获取所述内容请求 URL指向的内容并发送至所述用户 终端之前， 所述方法还包括：
根据所述携带 CID的内容请求 URL携带的校验信息，校验所述用户终 端为合法用户终端。
5、 一种 CDN节点服务器， 所述 CDN节点服务器包括： 接收模块、 判 断模块、 重定向模块、 发送模块和获耳 4莫块； 其中，
所述接收模块， 配置为接收所述用户终端发送的初始内容请求 URL或 所述用户终端发送的携带 CID的内容请求 URL;
所述判断模块， 配置为判断所述接收模块接收的初始内容请求 URL指 向的内容是否为 HLS内容；
所述重定向模块， 配置为在所述判断模块的判断结果为是时， 将所述 初始内容请求 URL重定向为携带所述内容请求 URL指向内容的 CID的 URL;
所述发送模块， 配置为将所述重定向模块重定向的携带 CID的内容请 求 URL发送至所述用户终端； 将所述获取模块获取的内容发送至所述用户 终端；
所述获取模块， 配置为在所述接收模块接收到所述用户终端发送的携 带 CID的内容请求 URL时， 根据所述内容请求 URL携带的 CID获取所述 内容请求 URL指向的内容。
6、 根据权利要求 5所述的 CDN节点服务器， 其中， 所述 CDN节点服 务器还包括：
解析模块， 配置为解析所述接收模块接收到的初始内容请求 URL; 所述判断模块， 还配置为在所述解析模块解析出 HLS标识时， 判定所 述用户终端发送的初始内容请求 URL指向的内容为 HLS内容。
7、 根据权利要求 5所述的 CDN节点服务器， 其中， 所述 CDN节点服 务器还包括：
存储模块， 配置为存储内容；
所述获取模块， 还配置为根据所述接收模块接收的内容请求 URL携带 的 CID在所述存储模块检索所述内容请求 URL指向的内容，并在没有检索 到所述内容请求 URL指向的内容时， 生成针对所述内容请求 URL指向内 容的中继请求；
所述发送模块， 还配置为将所述获取模块检索到的内容发送至所述用 户终端； 将所述获取模块生成的中继请求发送至上级 CDN节点服务器； 将 所述接收模块接收的内容发送至所述用户终端；
所述接收模块， 还配置为接收所述上级 CDN节点服务器返回的内容。
8、根据权利要求 5、 6或 7所述的 CDN节点服务器， 其中， 所述 CDN 节点服务器还包括：
校验模块， 配置为根据所述接收模块接收到的携带 CID 的内容请求 URL携带的校验信息， 校验所述用户终端是否为合法用户终端；
所述获取模块， 还配置为在所述校验模块的校验结果为是时， 根据所 述内容提供请求 URL携带的 CID获取所述内容请求 URL指向的内容。
9、一种 HLS内容分发系统，其中，所述 HLS内容分发系统包括： CDN 节点服务器和用户终端； 其中，
所述 CDN节点服务器，配置为确定用户终端发送的初始内容请求 URL 指向的内容为 HLS内容时，重定向所述初始内容请求 URL为携带所述初始 内容请求 URL指向内容的 CID的 URL并发送至所述用户终端； 接收到所 述用户终端发送的携带 CID的内容请求 URL时， 根据所述内容请求 URL 携带的 CID获取所述内容请求 URL指向的内容并发送至所述用户终端； 所述用户终端，配置为向所述 CDN节点服务器发送初始内容请求 URL 或携带 CID的内容请求 URL。
10、 根据权利要求 9所述的 HLS内容分发系统， 其中， 所述 CDN节 点服务器为权利要求 5至 8任一项所述的 CDN节点服务器。
PCT/CN2013/082947 2013-01-22 2013-09-04 超文本传输协议直播流内容分发方法、系统及设备 WO2014114086A1 (zh)

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