WO2011137809A1

WO2011137809A1 - Method, apparatus and system for realizing hypertext transfer protocol redirection in content delivery network

Info

Publication number: WO2011137809A1
Application number: PCT/CN2011/074490
Authority: WO
Inventors: 王敬; 陈寒冰
Original assignee: 华为技术有限公司
Priority date: 2010-11-26
Filing date: 2011-05-23
Publication date: 2011-11-10
Also published as: CN102143204A

Abstract

The embodiments of the invention provide a method, an apparatus and a system for requesting HyperText Transfer Protocol (HTTP) redirection in a Content Delivery Network (CDN). The method includes: a terminal device transmits an HTTP redirection request to a routing server, wherein the request is transmitted in the manner of User Datagram Protocol (UDP) (101); the terminal device receives a response returned from the routing server, wherein the response includes an address of a redirection destination server and an indication of the manner for initiating an HTTP request to the destination server (102); the terminal device initiates the HTTP request to the destination server according to the manner indicated in the response (103). The realization of the technical solutions of the invention improves the speed of redirection from a technological perspective, and from a perspective of a user, reduces the time that the CDN responds to a user request, and shortens the delay from clicking the request to obtaining the beginning content by the user.

Description

Method, device and system for realizing hypertext transfer protocol redirection in a content distribution network. The application claims the application number of 201010569776.7, which is filed on November 26, 2010, and the invention name is "a hypertext in a content distribution network". The priority of the Chinese application for the method, the device and the system of the transmission protocol redirection is incorporated herein by reference. Technical field

The present invention relates to the field of communications technologies, and more particularly to a method, apparatus, and system for implementing hypertext transfer protocol redirection in a content distribution network. Background technique

HTTP (HyperText Transfer Protoco, Hypertext Transfer Protocol) is the most important way to exchange information over the Internet, based on the request/response model. The client establishes a TCP (Transmission Control Protocol) link with the server and sends a request to the server. The server responds to the request with a status line containing the protocol version of the message, a success and failure code, and related Contains server information, resource entity information, and possibly MIME (Multipurpose Internet Mail Extensions) style messages. HTTP/1.0[3] creates a new TCP link for each HTTP request/response, so a page containing HTML content and images will need to be established for multiple short-term TCP links before being provided to the user, and a TCP link The establishment will require three handshakes. In order to obtain the appropriate transmission speed, the link reliability HTTP/1.1 [4] proposes a sustainable link implementation method, which will only establish a TCP link and repeatedly use it to transmit a series of request/response messages, which can reduce the link. The number of establishments and the cost of frequent links.

The CDN (Content Delivery Network) is a new type of network construction that is specially optimized for the release of broadband rich media over traditional IP networks.

The current CDN system, located in the next-generation content management and distribution network, is a content distribution network superimposed on the existing Internet, Cable, and Moblie networks. Redirect routing in a CDN network It is implemented by a routing server (hereinafter referred to as MC) in the CDN network. Its functions include two parts. One is to process the request sent by the UE, such as an HTTP request, and the routing server selects an appropriate edge server (hereinafter referred to as MX) to provide the user. Provide services. After the UE clicks the HTTP link of a content on the website, it sends a DNS (Domain Name System) request message to the LocalDNS to obtain the address of the link; LocalDNS obtains the address of the content link to the upper DNS; the DNS server points the address of the content CDN routing server in the CDN network; LocalDNS sends the content link address to the UE; the UE sends an HTTP GET request to the CDN routing server; the CDN routing server selects an optimal edge server according to the predetermined policy. The UE provides the content; and carries the URL (Uniform I Universal Resource Locator) address of the edge server to the UE in the HTTP 302 message; the UE obtains the URL address of the edge server and initiates an HTTP request to the edge server through DNS resolution. It can be seen that the client obtains the final content from the CDN network generally through two HTTP interaction processes: (1) The client sends the HTTP request to the routing server in the CDN network, and the routing server returns the final media server address through the redirect message. (2) The client initiates an HTTP request to the final media server to download the content or watch the video according to the redirected URL address.

The second function of the routing server in the CDN network handles HTTP interactions (edge servers, service management/device management, central storage servers) within the CDN network to obtain information about other devices. For example: When the edge server Cache miss, it will request the address of the central storage server from the CDN routing server to download the content, and then send the content to the client. This interaction is also based on the above HTTP redirect route. . Therefore, the current edge server downloads content from the central storage server through two HTTP interaction processes: (1) The edge server sends an HTTP request to the routing server to request the address of the specific central storage server, and the routing server returns the specified central storage through the HTTP response. The server address; (2) The edge server downloads the content to the central storage server through the HTTP request, and the central storage server provides the content to the edge server through the response message. In the existing solution, the two processes of redirect routing in the CDN network are based on the HTTP protocol, and the HTTP is implemented based on the TCP technology. Therefore, the slow start and request confirmation mechanism of the TCP itself causes the interactive message packet. More and longer, it is difficult for the client to get content. SUMMARY OF THE INVENTION Embodiments of the present invention provide a method, apparatus, and system for requesting hypertext transfer protocol redirection in a content distribution network, which can improve the speed of redirection in a CDN network.

The technical solution of the embodiment of the present invention is as follows:

An embodiment of the present invention provides a method for requesting a hypertext transfer protocol redirection in a content distribution network, including:

Sending a hypertext transfer protocol HTTP redirect request to a routing server in the content distribution network CDN; the request is sent based on the User Datagram Protocol UDP method;

Receiving a response returned by the routing server, where the response includes a redirected destination server address and a manner indication used to initiate an HTTP request to the destination server;

An HTTP request is initiated to the destination server in accordance with the manner indicated in the response.

An embodiment of the present invention provides a terminal device in a content distribution network, including:

a first sending module, configured to send an HTTP redirection request to a routing server in the content distribution network CDN; the request is sent according to a UDP manner;

The response receiving module is configured to receive a response returned by the routing server, where the response includes a redirected destination server address and a mode indication used to initiate an HTTP request to the destination server; and a second sending module, configured to respond according to the response In the manner indicated, an HTTP request is initiated to the destination server.

An embodiment of the present invention provides a routing server in a content distribution network, including: a request receiving module, configured to receive an HTTP redirect request sent by a terminal device; the request is sent by the terminal device according to a UDP manner;

a response sending module, configured to return a response to the terminal device for the redirect request, the ringing The destination server address of the redirect and the manner indication used to initiate the HTTP request to the destination server should be included.

An embodiment of the present invention provides a system for implementing hypertext transfer protocol redirection in a content distribution network, including:

a terminal device, configured to send an HTTP redirect request to the routing server; the request is sent according to a UDP manner; receiving a response returned by the routing server, where the response includes a redirected destination server address and initiating HTTP to the destination server Instructing the manner used by the request; initiating an HTTP request to the destination server according to the manner indicated in the response;

a routing server, configured to receive the redirection request sent by the terminal device, and return a response to the terminal device, where the response includes an address of the terminal device to the redirected destination server, and the The mode indication used by the destination server to initiate an HTTP request.

It can be seen from the technical solution provided by the foregoing embodiment of the present invention that the terminal device sends the HTTP redirect request to the routing server in a UDP manner, which not only improves the speed of redirection in the CDN network, but also improves the user's speed. The time the CDN responds to the user's request shortens the delay of the user's content from the click request to the acquisition. DRAWINGS

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly described below. It is obvious that the drawings in the following description are only some embodiments of the present invention, Those skilled in the art can also obtain other drawings based on these drawings without paying creative labor.

1 is a flowchart of a method for requesting HTTP redirection in a CDN network according to an embodiment of the present invention; FIG. 2 is a schematic structural diagram of a terminal device in a CDN network according to an embodiment of the present invention;

3 is a flowchart of a method for implementing HTTP redirection in a CDN network according to an embodiment of the present invention; FIG. 4 is a schematic structural diagram of a routing server in a CDN network according to an embodiment of the present invention; FIG. Schematic diagram of the HTTP redirection system in the network; FIG. 6 is a schematic diagram of a method for implementing HTTP redirection in a CDN network according to an embodiment of the present invention. FIG. 7 is a schematic diagram of a method for implementing HTTP redirection in a CDN network according to an embodiment of the present invention.

detailed description

BRIEF DESCRIPTION OF THE DRAWINGS The technical solutions in the embodiments of the present invention will be described in detail with reference to the accompanying drawings. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without creative work are within the scope of the present invention.

An embodiment of the present invention provides a method, an apparatus, and a system for requesting a hypertext transfer protocol redirection in a content distribution network. The terminal device sends an HTTP redirect request to a routing server in a CDN network according to a UDP manner, and returns according to the routing server. The indication in the response message selects whether to initiate a request to the destination server to be redirected by TCP or UDP. The implementation of the invention solves the problem that the existing redirection request process is initiated based on the TCP protocol, and the number of message interactions is long and time-consuming, which can improve the redirection speed of the CDN network, improve the time for the CDN to respond to user requests, and shorten the user's request for clicks. To delay in getting content.

It should be noted that the terminal device in the embodiment of the present invention refers to all the clients that use the HTTP to initiate the request, and are the UEs that interact with the CDN or the devices in the CDN network, including but not limited to the PC and the server. , CDN network equipment, etc.

The routing server in the CDN network involved in the embodiment of the present invention refers to a routing server device in the CDN network. The redirected destination server refers to the device that ultimately provides content in the CDN network, which can be MX/MS.

The technical solution of the present invention will be further described below in conjunction with specific embodiments.

As shown in FIG. 1, the embodiment of the present invention provides a method for requesting a hypertext transfer protocol redirection in a content distribution network from the perspective of a terminal device, and the technical solution includes: Step 101: The terminal device sends a hypertext transfer protocol HTTP redirect request to a routing server in the content distribution network CDN; the request is sent according to a user data packet protocol UDP mode;

Step 102: The terminal device receives a response returned by the routing server, where the response includes a redirected destination server address and a mode indication used to initiate an HTTP request to the destination server. Step 103: The terminal device according to the indication in the response In the manner, an HTTP request is initiated to the destination server.

In an embodiment of the present invention, the destination server address in step 302 may be in the form of a URL, or may be another form of server address.

The terminal device is capable of supporting the HTTP redirection request sent by the HTTP mode (HTTP over TCP) and the UDP mode (HTTP over UDP), and the following method is specifically provided by the terminal device according to the embodiment of the present invention. The program to achieve:

The terminal device can set the UDP mode to initiate the HTTP redirection request to the routing server in the default sending mode. Alternatively, the terminal device sets the priority to initiate the redirection request based on the UDP mode for the configured domain name with a specific suffix.

In an embodiment of the present invention, the method of the embodiment of the present invention may further include:

When the terminal device determines that the redirection request is timed out or the routing server does not support the UDP mode, the terminal device initiates the redirection request according to the transmission control protocol TCP mode.

Specifically, you can configure a suffix domain name for a specific suffix domain name, for example, huawei.cdn.net. Always initiate a request with HTTP over UDP by default.

It should be noted that when the terminal device is a UE that interacts with the CDN, when the UE interacts with the routing server, the routing server does not support the UDP mode, because in the standard, the HTTP protocol is based on the TCP protocol, and the UDP is based on the UDP. The HTTP protocol is not supported by many vendors, so CDN devices in some scenarios may not support HTTP over UDP.

When the terminal device is a device in the CDN network, when interacting with the routing server, since the CDN internal device and the routing server are both manufacturers' devices, they are either supported or not supported, so there is no self-incompatibility. Specifically, when the terminal device initiates an HTTP redirect request to the routing server based on the HTTP mode, the reliability of the HTTP message needs to be guaranteed by the terminal device itself, for example: when the terminal device waits for the HTTP request to time out, or finds that the request message is unreachable. When the terminal device re-enables HTTP over TCP, it initiates a redirect request.

In an embodiment of the present invention, the receiving, by the terminal device, the response returned by the routing server includes: identifying a response returned by the routing server, where the response includes an extension field, where the extension field is used to indicate initiation The method used by the HTTP request, including TCP or UDP;

The HTTP request is initiated to the destination server in a manner indicated by the extension field.

Connection-Type = "TCPTUDP" is implemented in the form.

As shown in FIG. 2, the embodiment of the present invention provides a terminal device in a content distribution network from the perspective of a terminal device, and includes the following functional modules:

The first sending module 21 is configured to send an HTTP redirect request to a routing server in the content distribution network; the request is sent according to a UDP manner;

The response receiving module 22 is configured to receive a response returned by the routing server, where the response includes a redirected destination server address and a manner indication used to initiate an HTTP request to the destination server;

The second sending module 23 is configured to send an HTTP request to the destination server according to the manner indicated in the response.

Optionally, in an embodiment of the present invention, the terminal device further includes:

The configuration unit 24 is configured to initiate the redirection request by using the UDP mode as the default sending mode, or set the priority to the domain name with a specific suffix to initiate the redirection request based on the UDP mode;

Optionally, in an embodiment of the present invention, the first sending module 21 is further configured to: after the redirection request is initiated in a sending manner configured by the configuration unit, determine the weight If the directed request times out or the routing server does not support the UDP mode, the redirect request is initiated based on the TCP method.

Optionally, in an embodiment of the present invention, the second sending module 23 may include: an identifying unit 231, configured to identify a response returned by the routing server, where the response includes an extended field, where The extension field is used to indicate the manner in which the HTTP request is initiated, and the manner includes TCP or UDP;

The sending unit 232 is configured to initiate the HTTP request to the destination server according to the manner indicated by the extended field.

In an embodiment of the present invention, the terminal device in the embodiment includes a user end interacting with a CDN network or an internal device of a CDN network; the routing server includes a routing server device in a CDN network; and the destination server includes A device in the CDN network that is ultimately capable of providing content.

It should be noted that the functions implemented by the functional modules in the device embodiment shown in FIG. 2 correspond to the technical solutions involved in the steps in the embodiment of FIG. 1 , wherein the same or corresponding technical features are included, and no For details, please refer to the related description in the method embodiment of FIG. 1.

As shown in FIG. 3, the embodiment of the present invention provides a method for implementing hypertext transfer protocol redirection in a content distribution network from the perspective of a routing server in a CDN network. The technical solution includes:

Step 301: The routing server receives an HTTP redirect request sent by the terminal device, where the request is sent by the terminal device according to a UDP user data packet protocol.

Step 302: The routing server returns a response to the terminal device for the redirect request, where the response includes an address of the redirected destination server and a mode indication used to initiate an HTTP request to the destination server.

Optionally, in an embodiment of the present invention, step 301 further includes:

The default mode set by the terminal device is the UDP mode initiated redirection request, or the terminal device receives the domain name configured with a specific suffix, and sets the priority to the UDP mode-based redirection request;

Determining the redirect request initiated by the UDP mode, and the routing server determines that it is not When the request initiated by the UDP mode is supported, the terminal device sends a response or does not respond; when the terminal device determines that the redirection request times out or the routing server does not support the UDP mode, the terminal device is received. The redirection request is initiated in TCP mode.

It should be noted that, in the embodiment of the present invention, the terminal device sets a process of preferentially initiating a redirection request in the manner of UDP. The related description has been made in the method embodiment of FIG. 1 and will not be described in detail herein.

In an embodiment of the present invention, returning the response to the terminal device in step 302 specifically includes:

The indication is carried by adding an extension field to the response returned by the terminal device, where the extension field is used to indicate a manner in which the terminal device initiates an HTTP request to the destination server, where the manner includes TCP or UDP;

Specifically, in the implementation process of the embodiment of the present invention, the extension field may be set to: X-Connection-Type = "TCPTUDP", to indicate that the subsequent terminal device initiates HTTP to the destination server to be redirected. The link is carried by TCP or by UDP.

Specifically, the message style after adding an extension field to the response message is as follows:

HTTP/1.1 302 Found

Content-Length: 153

Expires: Wed, 30 Jun 2010 09:16:41 GMT

Date: Wed, 30 Jun 2010 09:17:41 GMT

Location: http:〃 mxserver-1.cdn.net/runonce3.aspx

Content-Type: text/html; charset=utf-8

Server: Microsoft-I IS/6.0

X-Powered-By: ASP.NET

X-Connection-Type: TCP

X-AspNet-Version: 2.0.50727

Cache-Control: private

In the above manner, the bearer manner of the HTTP link that the terminal device subsequently redirects can be notified. Terminal Equipment.

As shown in FIG. 4, the embodiment of the present invention provides a routing server in a content distribution network from the perspective of a routing server in a CDN network, which can be used in conjunction with the terminal device shown in FIG. 2, and includes the following functional modules:

The request receiving module 41 is configured to receive an HTTP redirect request sent by the terminal device, where the request is sent by the terminal device according to the UDP method;

The response sending module 42 is configured to return a response to the terminal device for the redirect request, where the response includes a redirected destination server address and a mode indication used to initiate an HTTP request to the destination server.

In an embodiment of the present invention, the request receiving module 41 further includes:

The receiving unit 411 is configured to receive the redirection request by using the UDP mode in the default mode set by the terminal device, or receive the domain name with a specific suffix for the configured terminal device, and set the priority to be initiated based on the UDP mode. Redirecting request; requesting, when determining that the UDP mode is supported, instructing the response sending module to return the response to the terminal device; when determining that the UDP mode is not supported, sending a response or not to the terminal device Responding to the sending of the redirect request, receiving the terminal device to initiate an HTTP redirect request based on the TCP mode.

In an embodiment of the present invention, the response sending module 42 further includes:

The setting unit 421 is configured to add an extension field to the response returned by the terminal device, where the extension field is used to indicate a manner in which the terminal device initiates an HTTP request to the destination server, where the manner includes TCP or UDP. ;

The response unit 422 is configured to feed back, to the terminal device, a response that includes the extended field.

Specifically, in the implementation process of the embodiment of the present invention, the extension field may be set to X- Connection-Type = "TCPTUDP", to indicate that the HTTP link initiated by the subsequent terminal device to the destination server to be redirected is carried by TCP or by UDP.

In an embodiment of the present invention, the terminal device involved in the present invention includes a user terminal interacting with a CDN network or an internal device of a CDN network; the routing server includes a routing server device in a CDN network; and the destination server includes A device in the CDN network that is ultimately capable of providing content.

The function implemented by each functional module in the device embodiment shown in FIG. 4 corresponds to the technical solution involved in each step in the embodiment of FIG. 3, and includes the same or corresponding technical features, which are not described herein - see FIG. 3 A related description in the method embodiment.

As shown in FIG. 5, an embodiment of the present invention further provides a system for implementing hypertext transfer protocol redirection in a content distribution network, where the technical solution includes

The terminal device 51 shown in the embodiment of FIG. 2 is configured to send an HTTP redirect request to the routing server; the request is sent according to the UDP method; and receive a response returned by the routing server, where the response includes the redirected destination server. An address and an indication of a mode for initiating an HTTP request to the destination server; initiating an HTTP request to the destination server according to the manner indicated in the response; the CDN routing server 52 shown in the embodiment of FIG. Determining, by the terminal device, the redirect request, and returning, to the terminal device, a response, where the response includes an address of the target device to the redirected destination server and an HTTP request to the destination server. Mode indication.

In order to better understand the technical solution of the present invention, the following describes in detail the application scenarios of the two types of HTTP redirection processes in the CDN network.

When the technical solution of the embodiment of the present invention is applied to the application scenario of the redirection process between the UE and the routing server, the terminal device is a UE that interacts with the CDN network, and the routing server is a routing server device in the CDN network, and needs to be redirected. The destination server is an edge server that can finally provide content services for users. As shown in FIG. 6, the specific process includes:

Step 601: The UE clicks on a certain website link, and the link finally points to the routing server in the CDN network through the DNS server, and the UE preferentially initiates the HTTP to UDP mode to the routing server. HTTP GET redirect request;

Step 602: After receiving the HTTP GET request, the routing server selects an edge server according to its own routing policy, and feeds back a 302 message to the UE. The 302 message specifies the URL address of the redirected edge server, and is used to indicate the subsequent weight. Whether the directed HTTP link is carried by TCP or an extended field header field carried by UDP;

The specific form of this field is: X-Connection-Type = "TCPTUDP";

The 302 message style after adding the extension field is:

HTTP/1.1 302 Found

Content-Length: 153

Expires: Wed, 30 Jun 2010 09:16:41 GMT

Date: Wed, 30 Jun 2010 09:17:41 GMT

Location: http:〃 mxserver-1.cdn.net/runonce3.aspx

Content-Type: text/html; charset=utf-8

Server: Microsoft-I IS/6.0

X-Powered-By: ASP.NET

X-Connection-Type: TCP

X-AspNet-Version: 2.0.50727

Cache-Control: private Specifically, the routing server selects an edge server according to its own routing policy after receiving the HTTP GET request. The routing policy includes:

The routing server selects an optimal edge server to provide content to the UE according to the location of the UE, the content of the request, the load status of each edge server in the CDN network, and the like.

Step 603: The UE receives the 302 message returned by the routing server, initiates an HTTP request to the address specified by the Location in the message, and selects a TCP connection initiation request according to the indication in the X-Connection-Type. It should be noted that, when the UE initiates an HTTP redirect request in the UDP protocol-based manner, if the UE waits for the HTTP request to time out or the discovery message is unreachable, the UE may re-enable HTTP over TCP to send the request. The specific timeout mechanism may be determined according to the configuration, and the method may be determined in the embodiment of the present invention.

When the technical solution of the embodiment of the present invention is applied to an application scenario of an HTTP redirection process between a CDN internal device and a routing server, the terminal device is another network element in the CDN network (including edge server, central storage, network/service management). The server is a routing server device in the CDN network, and the destination server that needs to be redirected is an edge server that can finally provide content. As shown in FIG. 7, the specific process includes:

Step 701: The CDN network element preferentially initiates an HTTP redirect request by using an HTTP over UDP manner to the routing server.

The method for setting the priority of the CDN network element to send the HTTP redirect request in the UDP mode is the same as the process of the UE in the embodiment of the present invention.

Step 702: The routing server receives the HTTP over UDP request, and selects an optimal edge server to provide content to the CDN network element according to the content of the request, the load status of each edge server in the CDN network, and the like, and returns the content to the CDN network element. The response message carries the address of the edge server, and an HTTP field for indicating whether the subsequent redirect is carried by TCP or an extended field header field carried by UDP;

Step 703: The CDN network element initiates an HTTP request according to the redirected address in the 302 message.

It should be noted that when the CDN network element waits for the HTTP response of the routing server to time out, the request is initiated again by HTTP over TCP.

It should be noted that the interaction process between the other network elements (including the edge server, the central storage, the network/service management server) and the routing server in the CDN network in the technical solution shown in FIG. 7 is often involved in the actual application scenario. For example, after receiving the request from the UE, the edge server finds that the content of the UE is not cached. At this time, the edge server sends an HTTP request to the routing server to obtain the address of the best central storage server, and provides content services for the user. In summary, the method, device, and system for implementing hypertext transfer protocol redirection in a content distribution network according to an embodiment of the present invention, from a technical point of view, a requesting party that initiates redirection passes

The UDP mode initiates a redirection request, and replaces the existing interaction process based on the TCP-initiated redirection with 10 messages, which improves the speed of the redirection process in the CDN network. In addition, from the perspective of the user It is said that the time for the CDN to respond to the user request is increased, and the delay of the user from the click request to the start of the content is shortened.

A person skilled in the art can understand that all or part of the process of implementing the above embodiment method can be completed by a computer program to instruct related hardware, and the program can be stored in a computer readable storage medium. In execution, the flow of an embodiment of the methods as described above may be included. The storage medium may be a magnetic disk, an optical disk, a read-only memory (ROM), or a random access memory (RAM).

The above is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily think of changes or within the technical scope disclosed by the present invention. Alternatives are intended to be covered by the scope of the present invention. Therefore, the scope of the invention should be determined by the scope of the claims.

Claims

Claim

A method for requesting a hypertext transfer protocol redirection in a content distribution network, the method comprising:

The method according to claim 1, wherein the method further comprises: setting a UDP mode to initiate the redirect request by using a default sending mode, or setting a priority based on UDP for a configured domain name with a specific suffix The method initiates the redirect request.

The method according to claim 2, wherein the method further comprises: in the case of determining that the redirection request times out or the routing server does not support the UDP mode, using the TCP control mode based on the transmission control protocol Redirect request.

The method according to claim 1 or 3, further comprising:

Responding to the response returned by the routing server, where the response includes an extension field, where the extension field is used to indicate a manner for initiating an HTTP request, where the manner includes TCP or UDP;

5. A terminal device in a content distribution network, comprising:

The response receiving module is configured to receive a response returned by the routing server, where the response includes a redirected destination server address and a mode indication used to initiate an HTTP request to the destination server; a second sending module, configured to initiate to the destination server according to the manner indicated in the response

HTTP request.

The terminal device according to claim 5, wherein the terminal device further includes: a configuration module, configured to set a UDP mode to initiate the redirection request by using a default sending mode, or a specific suffix for the configuration The domain name is set to preferentially initiate the redirect request based on the UDP method.

The terminal device according to claim 6, wherein the first sending module is further configured to:

After the redirection request is initiated in the sending manner configured by the configuration unit, if it is determined that the redirection request times out or the routing server does not support the UDP mode, the redirection request is initiated by using the TCP-based method instead.

The terminal device according to claim 5 or 7, wherein the second sending module comprises:

An identification unit, configured to identify a response returned by the routing server, where the response includes an extension field, where the extension field is used to indicate a manner for initiating an HTTP request, where the manner includes TCP or UDP;

And a sending unit, configured to initiate the HTTP request to the destination server according to the manner indicated by the extended field.

The terminal device according to any one of claims 5 to 7, wherein the terminal device comprises a user terminal interacting with a CDN network or an internal device of a CDN network; the routing server comprises a route in a CDN network Server device; the destination server includes a device in the CDN network that is ultimately capable of providing content.

A CDN routing server in a content distribution network, comprising: a request receiving module, configured to receive an HTTP redirect request sent by the terminal device; the request is sent by the terminal device according to a UDP manner;

The response sending module is configured to return a response to the terminal device for the redirect request, where the response includes a redirected destination server address and a mode indication used to initiate an HTTP request to the destination server.

11. The CDN routing server according to claim 10, wherein the request receiving module comprises:

a receiving unit, configured to receive the redirection request by using a default mode set by the terminal device, or receiving a domain name with a specific suffix for the configured terminal device, and setting the priority to initiate the UDP-based manner. Redirecting a request, requesting, when determining that the UDP mode is supported, instructing the response sending module to return the response to the terminal device; sending a response or not responding to the terminal device when determining that the UDP mode is not supported When the redirect request is sent, the receiving terminal device initiates an HTTP redirect request based on the TCP mode.

The CDN routing server according to claim 10 or 11, wherein the response sending module comprises:

a setting unit, configured to add an extension field to the response returned to the terminal device, where the extension field is used to indicate a manner in which the terminal device initiates an HTTP request to the destination server, where the manner includes TCP or UDP ;

And a response unit, configured to feed back, to the terminal device, a response that includes the extended field.

The routing server according to claim 10 or 11, wherein the terminal device comprises a user terminal interacting with a CDN network or an internal device of a CDN network; A routing server device in a CDN network; the destination server includes a device in the CDN network that is ultimately capable of providing content.

14. A system for implementing hypertext transfer protocol redirection in a content distribution network, characterized by, including