CN108234639A - A kind of data access method and device based on content distributing network CDN - Google Patents

Abstract

An embodiment of the present invention provides a data access method and device based on a content distribution network CDN. There are multiple nodes in the content distribution network CDN. The method includes: receiving an access request in the current node; Extracting resource identification information; judging whether data corresponding to the resource identification information in the access request is stored; and returning the data when the data has been stored. Cache and locate data through resource identification information. In the case of multiple URLs, the same data can be identified for caching, which reduces the amount of storage in this case, reduces the number of data queries when querying, and improves data hits. rate, thereby reducing the frequency of back-to-source operations and lowering the access pressure on the source website.

Description

A data access method and device based on content distribution network CDN

technical field

The invention relates to the technical field of computer processing, in particular to a CDN-based data access method and a CDN-based data access device.

Background technique

CDN (Content Delivery Network, content distribution network) is often used in websites to transmit data. CDN adds a new network structure to the existing network and deploys multiple nodes for caching data so that users Data can be transmitted to or obtained from nearby nodes to provide corresponding services.

At present, in CDN, data is usually cached based on URL (Uniform Resource Locator, Uniform Resource Locator), that is, data under the same URL is cached once, resulting in a large amount of data storage, resulting in a relatively large amount of data to be queried when querying. If there are too many data, the hit rate of the data is low, and the back-to-source operation is performed when there is a miss, that is, the data is obtained from the source website for caching, thereby increasing the frequency of back-to-source operations and increasing the access pressure of the source website.

Contents of the invention

In view of the above problems, the present invention is proposed to provide a CDN-based data access method and a corresponding CDN-based data access device that overcome the above problems or at least partially solve the above problems.

According to one aspect of the present invention, a data access method based on a content distribution network CDN is provided. There are multiple nodes in the content distribution network CDN, and the method includes:

Receive an access request in the current node;

extracting resource identification information from the access request;

judging whether data corresponding to the resource identification information in the access request is stored;

When the data has been stored, return the data.

Optionally, also include:

when the data is not stored, obtaining the data;

Return the data.

Optionally, the judging whether data corresponding to the resource identification information in the access request is stored includes:

Querying a preset storage information table, the resource identification information of the stored data is recorded in the storage information table;

matching the resource identification information in the access request with the resource identification information in the stored information table;

When the matching is successful, it is determined that the data has been stored;

When the matching fails, it is determined that the data is not stored.

Optionally, the resource identification information includes server information Host and uniform resource identifier URI;

The matching of the resource identification information in the access request with the resource identification information in the storage information table includes:

Sub-step S121, judging whether the server information Host in the access request is the same as the server information Host in the stored information table; if yes, execute sub-step S122, if not, execute sub-step S124;

Sub-step S122, judging whether the uniform resource identifier URI in the access request is the same as the uniform resource identifier URI in the stored information table; if yes, execute sub-step S123, if not, execute sub-step S124;

Sub-step S123, determine that the matching is successful;

In sub-step S124, it is determined that the matching fails.

Optionally, also include:

cache said data;

A mapping relationship between the resource identification information and the data is established in a preset storage information table.

Optionally, establishing the mapping relationship between the resource identification information and the data in the preset storage information table includes:

A key-value pair is established in a preset storage information table with the server information Host and the uniform resource identifier URI as a key and the data as a value.

Optionally, the resource identification information includes a data identification,

The judging whether data corresponding to the resource identification information in the access request is stored includes:

Querying a preset storage information table, the data identifier of the stored data is recorded in the storage information table;

matching the resource identification information in the access request with the data identification in the storage information table;

When the matching is successful, it is determined that the data has been stored;

When the matching fails, it is determined that the data is not stored.

Optionally, the resource identification information also includes server information Host and uniform resource identifier URI, and the stored information table also records server information Host and uniform resource identifier URI corresponding to the stored data, and the method further includes include:

When it is determined that the data has been stored, judging whether the server information Host and the uniform resource identifier URI in the resource identification information are consistent with the server information Host and the uniform resource identifier URI corresponding to the data in the storage information table;

If not, establish a mapping relationship between the resource identification information and the data in the storage information table.

According to another aspect of the present invention, a data access device based on a content distribution network CDN is provided, and there are multiple nodes in the content distribution network CDN, the device includes:

An access request receiving module, configured to receive an access request in the current node;

A resource identification information extraction module, configured to extract resource identification information from the access request;

A storage judging module, configured to judge whether data corresponding to the resource identification information in the access request is stored;

The first data returning module is used for returning the data when the data has been stored.

Optionally, also include:

A data acquisition module, configured to acquire the data when the data is not stored;

The second data return module is used to return the data.

Optionally, the storage judgment module includes:

The first storage information table query submodule is used to query a preset storage information table, and resource identification information of stored data is recorded in the storage information table;

A resource identification information matching submodule, configured to match the resource identification information in the access request with the resource identification information in the storage information table;

The first stored determination submodule is used to determine that the data has been stored when the matching is successful;

The first non-storage determining submodule is configured to determine that the data is not stored when the matching fails.

Optionally, the resource identification information includes server information Host and uniform resource identifier URI;

The resource identification information matching submodule includes:

Host judging unit, used to judge whether the server information Host in the access request is the same as the server information Host in the stored information table; if so, call the URI judging unit, if not, then match failure determining unit;

The URI judging unit is used to judge whether the uniform resource identifier URI in the access request is the same as the uniform resource identifier URI in the stored information table; if so, call the matching success determination unit, if not, call the matching failure Determine the unit;

A matching success determination unit, configured to determine that the matching is successful;

The matching failure determination unit is configured to determine the matching failure.

Optionally, also include:

A data cache module, configured to cache the data;

The first mapping relationship establishment module is configured to establish a mapping relationship between the resource identification information and the data in a preset storage information table.

Optionally, the first mapping relationship establishment module includes:

The key-value pair establishment sub-module is used for establishing key-value pairs in a preset storage information table with the server information Host and the uniform resource identifier URI as keys and the data as a value.

Optionally, the resource identification information includes a data identification,

The storage judgment module includes:

The second storage information table query submodule is used to query the preset storage information table, and the data identification of the stored data is recorded in the storage information table;

A data identifier matching submodule, configured to match the resource identifier information in the access request with the data identifier in the storage information table;

The second stored determination submodule is used to determine that the data has been stored when the matching is successful;

The second non-storage determining submodule is used to determine that the data is not stored when the matching fails.

Optionally, the resource identification information further includes server information Host and uniform resource identifier URI, and the stored information table also records server information Host and uniform resource identifier URI corresponding to the stored data, and the device also include:

An information matching module, configured to determine that the server information Host and the uniform resource identifier URI in the resource identification information correspond to the server information Host and the uniform resource identifier corresponding to the data in the stored information table when it is determined that the data has been stored Whether the symbol URI is consistent; if not, then call the second mapping relationship establishment module;

The second mapping relationship establishment module is configured to establish a mapping relationship between the resource identification information and the data in the storage information table.

In the embodiment of the present invention, there are multiple nodes in the content distribution network CDN, the current node receives the access request, extracts the resource identification information from the access request, and judges whether the data corresponding to the resource identification information in the access request is stored , when the data has been stored, the data is returned, and the data is cached and located through the resource identification information. In the case of multiple URLs, the same data can be identified and cached, which reduces the amount of storage in this case and reduces the When the data is queried, the number of queries increases the hit rate of the data, thereby reducing the frequency of back-to-source operations and reducing the access pressure of the source website.

The above description is only an overview of the technical solution of the present invention. In order to better understand the technical means of the present invention, it can be implemented according to the contents of the description, and in order to make the above and other purposes, features and advantages of the present invention more obvious and understandable , the specific embodiments of the present invention are enumerated below.

Description of drawings

Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiment. The drawings are only for the purpose of illustrating a preferred embodiment and are not to be considered as limiting the invention. Also throughout the drawings, the same reference numerals are used to designate the same components. In the attached picture:

FIG. 1 shows a schematic flow chart of the steps of an embodiment of a data access method based on a content distribution network CDN according to an embodiment of the present invention;

Fig. 2 shows a schematic structural diagram of a content distribution network CDN according to an embodiment of the present invention;

FIG. 3 shows a schematic flow chart of the steps of another embodiment of a data access method based on a content distribution network (CDN) according to an embodiment of the present invention; and

Fig. 4 shows a schematic block diagram of an embodiment of a data access device based on a content distribution network (CDN) according to an embodiment of the present invention.

Detailed ways

Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided for more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

Referring to FIG. 1 , it shows a schematic flowchart of the steps of an embodiment of a data access method based on a content distribution network CDN according to an embodiment of the present invention, which may specifically include the following steps:

Step 101, receiving an access request in the current node.

In the content distribution network CDN, there are usually multiple nodes for transmitting and caching data (such as live streams, cached data, etc.), and the data of the client and the source website (such as live streams, cached data, etc.) ), it can be pushed to other nodes, and when the user accesses data (such as live streaming, cached data, etc.), the user's request is routed or directed to the node closest to the user's access network or with the best access effect through scheduling. The node provides users with data (such as live streaming, cached data, etc.); compared with directly accessing the source website, this method shortens the network distance between the user and the data (such as live streaming, cached data, etc.), thereby achieving acceleration Effect.

It should be noted that, in different CDNs, the topological structures may be different.

In one embodiment, the multiple nodes of the CDN include a central node, a parent node, and an edge node.

In some cases, the central node is a resource super-convergence node, which can communicate with the source website and gather a large number of resources of the source website. These resources are generally less-changing resources, such as videos, pictures, and so on.

In some cases, the central node only saves file information, such as URL (Uniform Resource Locator, Uniform Resource Locator), size, etc., and does not directly cache the file. Other nodes in the content distribution network CDN obtain the pending The file information of the cached file is reported to the central node after the file is cached, and the central node counts the files cached by other nodes.

It should be noted that the central node can be deployed in some content distribution network CDN, that is, this part of the content distribution network CDN is a three-layer structure of central node-parent layer node-edge node, in some content distribution network CDN may not The deployment center node, that is, the part of the content distribution network CDN is a two-layer structure of parent layer node-edge node, which is not limited in the embodiment of the present invention.

The parent layer node is the sub-convergence node of resources. On the one hand, because in the content distribution network CDN, each node generally uses proprietary communication cables such as two-way optical fiber for communication, the communication quality between the central node and the parent layer node It has a high degree of guarantee. In the case of obtaining less-changing resources and poor communication quality of external source websites, it can communicate with the central node and obtain resources from the central node. On the other hand, when obtaining new resources and performing data In the case of operations (such as payment), etc., it is possible to communicate with the source website and obtain resources from the source website.

Furthermore, parent layer nodes can communicate with each other to form a transmission path between parent layer nodes and edge nodes, that is, a path composed of intermediate transmission nodes and communication cables from one node to another node.

Specifically, there are many ways to select the transmission path, and at least one of the following ways can be selected according to actual needs:

1. Select a transmission path whose transmission performance meets the set requirements.

Transmission performance refers to the transmission capability of the transmission path of the transmission stream data. The transmission performance of the transmission path can be determined according to the distance between nodes, transmission speed, data loss rate, and congestion status. By regularly updating the transmission performance between every two nodes, According to the transmission performance of each transmission path between nodes, select the transmission path whose transmission performance meets the requirements or has the best transmission performance.

2. Select the transmission path with the least number of passing nodes.

Select the transmission path with the least number of nodes among multiple transmission paths, so that the transmission of data from one node to another node can be completed by occupying the least transmission resources.

3. Select a transmission path that has not been selected for a period of time.

If there is streaming data transmitted from one node to another node in history, then when there is new data to be transmitted between the two, one of the transmission paths that has not been selected for a period of time can be selected to avoid Always selecting the same transmission path causes the nodes on the transmission path to be overloaded.

Certainly, the above-mentioned selection method of the transmission path is only an example. When implementing the embodiment of the present invention, other selection methods of the transmission path may be set according to the actual situation, which is not limited in the embodiment of the present invention. In addition, in addition to the above method of selecting the transmission path, those skilled in the art may also use other methods of selecting the transmission path according to actual needs, which is not limited in this embodiment of the present invention.

In addition, the parent node is generally deployed with multiple operators' computer rooms, and the computer rooms are connected by proprietary communication cables such as dual-wire optical cables. Edge nodes are generally deployed in a certain operator's network The computer room of the parent layer node can communicate with the edge node.

Edge nodes have the ability to communicate with each other, but generally, they do not communicate directly.

Edge nodes can access clients, such as mobile phones, tablet computers, TVs, etc., to communicate with clients, such as obtaining live streams collected by them, or pushing live streams to the client.

In order for those skilled in the art to better understand the embodiment of the present invention, the content delivery network CDN in the embodiment of the present invention is described below through specific examples.

As shown in Figure 2, the parent layer nodes are A1, A2, A3, and A4, which can be deployed according to geographical locations. For example, A1 is deployed in Beijing, A2 is deployed in Shanghai, A3 is deployed in Guangzhou, A4 is deployed in Zhengzhou, and A1 can be deployed with A2 communicates, A2 can communicate with A3, A3 can communicate with A4, A4 can communicate with A1, and the circular communication between parent layer nodes can form a ring-shaped parent layer structure.

In addition, each parent layer node can be connected to one or more edge nodes, and edge nodes can also be deployed according to factors such as geographic location and operators. Generally, edge nodes do not communicate directly, but transit through parent layer nodes. Parent node A1 is connected to edge nodes A11 and A12, parent node A2 is connected to edge nodes A21 and A22, parent node A3 is connected to edge nodes A31, A32 and A33, and parent node A4 is connected to edge nodes A41, A42 and A43.

The edge node accesses the client, such as the edge node A32 accesses the client B1, and is used to receive data (such as a live stream) from the client, or send data (such as a live stream) to the client.

In this embodiment of the present invention, the current node may receive an access request, that is, a request to access certain data.

In the above content distribution network CDN, if the current node is an edge node, it can receive an access request from a client, and if the current node is a parent node, it can receive an access request from an edge node.

Step 102, extract resource identification information from the access request.

In practical applications, the same resource may exist for multiple URLs, such as video, audio, picture, and so on.

For example, in the case of concurrent browsers, there are restrictions on access. Usually, a URL can only accept 2-5 accesses, causing the browser to block, so multiple URLs appear.

For another example, in the case of operator hijacking, the application has dual domain names, and the first URL is abnormal, that is, the second URL is called.

For another example, if illegal content is linked to a URL, it will be blocked from the root domain name, so there will be multiple URLs.

Different URLs, but the same resource, if cached according to the URL, it will result in caching multiple copies of the same resource.

However, in the embodiment of the present invention, resources may be cached based on resource identification information.

The so-called resource identification information may refer to information identifying resources, for example, Host (server information), URI (Uniform Resource Identifier) and the like.

For an access request, resource identification information can be extracted from its header information header.

For example, include the following information in an access request:

GET http://download.123.de:80/somedata.exe

Host:download.microtool.de

Accept:*/*

Pragma: no-cache

Cache-Control: no-cache

Referer: http://download.microtool.de/

User-Agent: Mozilla/4.04[en] (Win95; I; Nav)

Range:bytes=554554-

Wherein, the first line of the above example indicates that the HTTP client (possibly a browser, download program) obtains the file under the specified URL through the GET method.

The Host header field specifies the Internet host and port number of the requested resource, indicating the location of the original server or gateway of the requested URL.

The Referer header field allows the client to specify the source resource address of the request URI, which allows the server to generate a fallback list, which can be used for login, cache optimization, etc. It also allows aborted or erroneous connections to be tracked for maintenance purposes. If the requested URI does not have its own URI address, the Referer cannot be sent. If a partial URI address is specified, this address should be a relative address.

Step 103, judging whether the data mapped to the resource identification information in the access request is stored.

In a specific implementation, if the resource identification information is extracted from the access request, it may be queried locally whether the data corresponding to the resource identification information is previously cached.

In one embodiment of the present invention, step 103 may include the following sub-steps:

Sub-step S11, querying a preset storage information table.

By applying the embodiment of the present invention, the resource identification information of cached data can be recorded in advance and written into the storage information table. Therefore, the resource identification information of the stored data is recorded in the storage information table.

Sub-step S12, matching the resource identification information in the access request with the resource identification information in the stored information table.

In a specific implementation, the resource identification information in the access request can be matched with the resource identification information in the storage information table by means of regular expressions or the like.

In one embodiment of the present invention, the resource identification information includes server information Host and Uniform Resource Identifier URI, then substep S12 may further include the following substeps:

Sub-step S121, judging whether the server information Host in the access request is the same as the server information Host in the stored information table; if yes, execute sub-step S122, and if not, execute sub-step S124.

Sub-step S122, judging whether the URI in the access request is the same as the URI in the storage information table; if yes, execute sub-step S123, and if not, execute sub-step S124.

Sub-step S123, determine that the matching is successful;

In sub-step S124, it is determined that the matching fails.

In the embodiment of the present invention, if the server information Host and the uniform resource identifier URI are all the same, it can be determined that the resource identification information in the access request matches the resource identification information in the storage information table successfully; if the server information Host and the uniform resource identifier URI If any of the URIs are different, it can be determined that the resource identification information in the access request fails to match the resource identification information in the storage information table.

Sub-step S13, when the matching is successful, it is determined that the data has been stored.

Sub-step S14, when the matching fails, it is determined that the data is not stored.

If the resource identification information in the access request matches the resource identification information in the storage information table successfully, it means that the data identified by the resource identification information has been cached previously.

If the resource identification information in the access request fails to match the resource identification information in the storage information table, it means that the data identified by the resource identification information has not been cached previously.

Step 104, when the data has been stored, return the data.

If the current node has cached the data required for the access request, it can respond to the access request and return the data.

In the above content delivery network CDN, if the current node is an edge node, the data can be returned to the client, and if the current node is a parent layer node, the data can be returned to the edge node.

In the embodiment of the present invention, there are multiple nodes in the content distribution network CDN, the current node receives the access request, extracts the resource identification information from the access request, and judges whether the data corresponding to the resource identification information in the access request is stored , when the data has been stored, the data is returned, and the data is cached and located through the resource identification information. In the case of multiple URLs, the same data can be identified and cached, which reduces the amount of storage in this case and reduces the When the data is queried, the number of queries increases the hit rate of the data, thereby reducing the frequency of back-to-source operations and reducing the access pressure of the source website.

Referring to FIG. 3 , it shows a schematic flowchart of the steps of an embodiment of a data access method based on a content distribution network CDN according to an embodiment of the present invention, which may specifically include the following steps:

Step 301, receiving an access request in the current node.

Step 302, extract resource identification information from the access request.

Step 303, judging whether the data mapped to the resource identification information in the access request is stored.

In another embodiment of the present invention, step 103 may include the following sub-steps:

Sub-step S21, querying a preset storage information table.

By applying the embodiment of the present invention, the cached data can be pre-recorded with its resource identifier and written into the storage information table, where the data identifier of the stored data is recorded.

Sub-step S22, matching the resource identification information in the access request with the data identification in the storage information table.

Sub-step S23, when the matching is successful, it is determined that the data has been stored.

Sub-step S24, when the matching fails, it is determined that the data is not stored.

In a specific implementation, the resource identification information in the access request can be matched with the resource identification in the storage information table by means of regular expressions or the like.

If the resource identification information in the access request matches the resource identification in the storage information table successfully, it means that the data identified by the resource identification information has been cached previously.

If the resource identification information in the access request fails to match the resource identification in the storage information table, it means that the data identified by the resource identification information has not been cached previously.

In the embodiment of the present invention, the resource identification information may further include server information Host and uniform resource identifier URI, and the stored information table also records server information Host and uniform resource identifier URI corresponding to the stored data.

Therefore, in the embodiment of the present invention, when it is determined that the data has been stored, it is judged whether the server information Host and the uniform resource identifier URI in the resource identification information are consistent with the server information Host and the uniform resource identifier URI corresponding to the data in the storage information table ; If not, establish a mapping relationship between resource identification information and data in the storage information table.

Step 304, when the data is not stored, obtain the data.

If the current node does not cache the data required for the access request, a back-to-source operation can be performed, that is, the data required for the access request is obtained from the source website.

In the above content distribution network CDN, if the current node is an edge node, it sends an access request to the parent layer node, and receives data sent by the parent layer node in response to the access request.

If the current node is a parent layer node, an access request is sent to the source website, and data sent by the source website in response to the access request is received.

For the parent layer node, it can be judged whether the data has been cached; if so, the data block is sent to the edge node, otherwise, the data is obtained from the source website through the URL of the data and sent to the edge node.

Step 305, returning the data.

After obtaining the data through the back-to-source operation, you can respond to the access request and return the data.

Step 306, cache the data.

Step 307, establishing a mapping relationship between the resource identification information and the data in a preset storage information table.

For the current node, after obtaining the data, it can be cached, and the resource identification information of the data is used as the key (key), and the data is used as the value (value), and written into the storage information table, Establish a mapping relationship in the form of key-value pairs.

In a specific implementation, if the resource identification information includes the server information Host and the uniform resource identifier URI, then the server information Host and the uniform resource identifier URI can be used as the key and data as the value, and the key value can be established in the preset storage information table right.

For the method embodiment, for the sake of simple description, it is expressed as a series of action combinations, but those skilled in the art should know that the embodiment of the present invention is not limited by the described action order, because according to the embodiment of the present invention , certain steps may be performed in other order or simultaneously. Secondly, those skilled in the art should also know that the embodiments described in the specification belong to preferred embodiments, and the actions involved are not necessarily required by the embodiments of the present invention.

Referring to FIG. 4 , it shows a schematic block diagram of a data access device embodiment based on a content distribution network CDN according to an embodiment of the present invention. There are multiple nodes in the content distribution network CDN, and the device may specifically include the following module:

An access request receiving module 401, configured to receive an access request in the current node;

A resource identification information extraction module 402, configured to extract resource identification information from the access request;

A storage judging module 403, configured to judge whether data corresponding to the resource identification information in the access request is stored;

The first data return module 404 is configured to return the data when the data has been stored.

In one embodiment of the present invention, also include:

A data acquisition module, configured to acquire the data when the data is not stored;

The second data return module is used to return the data.

In one embodiment of the present invention, the storage judging module 403 includes:

The first storage information table query submodule is used to query a preset storage information table, and resource identification information of stored data is recorded in the storage information table;

A resource identification information matching submodule, configured to match the resource identification information in the access request with the resource identification information in the storage information table;

The first stored determination submodule is used to determine that the data has been stored when the matching is successful;

The first non-storage determining submodule is configured to determine that the data is not stored when the matching fails.

In one embodiment of the present invention, the resource identification information includes server information Host and uniform resource identifier URI;

The resource identification information matching submodule includes:

Host judging unit, used to judge whether the server information Host in the access request is the same as the server information Host in the stored information table; if so, call the URI judging unit, if not, then match failure determining unit;

The URI judging unit is used to judge whether the uniform resource identifier URI in the access request is the same as the uniform resource identifier URI in the stored information table; if so, call the matching success determination unit, if not, call the matching failure Determine the unit;

A matching success determination unit, configured to determine that the matching is successful;

The matching failure determination unit is configured to determine the matching failure.

In one embodiment of the present invention, also include:

A data cache module, configured to cache the data;

The first mapping relationship establishment module is configured to establish a mapping relationship between the resource identification information and the data in a preset storage information table.

In one embodiment of the present invention, the first mapping relationship establishment module includes:

The key-value pair establishment sub-module is used for establishing key-value pairs in a preset storage information table with the server information Host and the uniform resource identifier URI as keys and the data as a value.

In an embodiment of the present invention, the resource identification information includes a data identification,

The storage judging module 403 includes:

The second storage information table query submodule is used to query the preset storage information table, and the data identification of the stored data is recorded in the storage information table;

A data identifier matching submodule, configured to match the resource identifier information in the access request with the data identifier in the storage information table;

The second stored determination submodule is used to determine that the data has been stored when the matching is successful;

The second non-storage determining submodule is used to determine that the data is not stored when the matching fails.

In one embodiment of the present invention, the resource identification information also includes server information Host and uniform resource identifier URI, and the stored information table also records server information Host and uniform resource identifier URI corresponding to the stored data , the device also includes:

An information matching module, configured to determine that the server information Host and the uniform resource identifier URI in the resource identification information correspond to the server information Host and the uniform resource identifier corresponding to the data in the stored information table when it is determined that the data has been stored Whether the symbol URI is consistent; if not, then call the second mapping relationship establishment module;

The second mapping relationship establishment module is configured to establish a mapping relationship between the resource identification information and the data in the storage information table.

As for the device embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and for related parts, please refer to the part of the description of the method embodiment.

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

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

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

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

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

The various component embodiments of the present invention may be implemented in hardware, or in software modules running on one or more processors, or in a combination thereof. Those skilled in the art should understand that a microprocessor or a digital signal processor (DSP) can be used in practice to implement some or all of some or all of the components in the data access device based on the content distribution network CDN according to the embodiment of the present invention. Full functionality. The present invention can also be implemented as an apparatus or an apparatus program (for example, a computer program and a computer program product) for performing a part or all of the methods described herein. Such a program for realizing the present invention may be stored on a computer-readable medium, or may be in the form of one or more signals. Such a signal may be downloaded from an Internet site, or provided on a carrier signal, or provided in any other form.

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

The embodiment of the present invention discloses A1, a data access method based on content distribution network CDN, which has multiple nodes in content distribution network CDN, and the method includes:

Receive an access request in the current node;

extracting resource identification information from the access request;

judging whether data corresponding to the resource identification information in the access request is stored;

When the data has been stored, return the data.

A2, the method as described in A1, also includes:

when the data is not stored, obtaining the data;

Return the data.

A3. The method described in A1 or A2, the judging whether the data corresponding to the resource identification information in the access request is stored includes:

Querying a preset storage information table, the resource identification information of the stored data is recorded in the storage information table;

matching the resource identification information in the access request with the resource identification information in the stored information table;

When the matching is successful, it is determined that the data has been stored;

When the matching fails, it is determined that the data is not stored.

A4, the method as described in A3, the resource identification information includes server information Host and uniform resource identifier URI;

The matching of the resource identification information in the access request with the resource identification information in the storage information table includes:

Sub-step S121, judging whether the server information Host in the access request is the same as the server information Host in the stored information table; if yes, execute sub-step S122, if not, execute sub-step S124;

Sub-step S122, judging whether the uniform resource identifier URI in the access request is the same as the uniform resource identifier URI in the stored information table; if yes, execute sub-step S123, if not, execute sub-step S124;

Sub-step S123, determine that the matching is successful;

In sub-step S124, it is determined that the matching fails.

A5. The method as described in A2 or A4, further comprising:

cache said data;

A mapping relationship between the resource identification information and the data is established in a preset storage information table.

A6. The method as described in A5, the establishment of the mapping relationship between the resource identification information and the data in the preset storage information table includes:

A key-value pair is established in a preset storage information table with the server information Host and the uniform resource identifier URI as a key and the data as a value.

A7. The method as described in A2, wherein the resource identification information includes a data identification,

The judging whether data corresponding to the resource identification information in the access request is stored includes:

Querying a preset storage information table, the data identifier of the stored data is recorded in the storage information table;

matching the resource identification information in the access request with the data identification in the storage information table;

When the matching is successful, it is determined that the data has been stored;

When the matching fails, it is determined that the data is not stored.

A8, the method as described in A7, the resource identification information also includes server information Host and uniform resource identifier URI, and the server information Host and uniform resource identifier URI corresponding to the stored data are also recorded in the storage information table , the method also includes:

When it is determined that the data has been stored, judging whether the server information Host and the uniform resource identifier URI in the resource identification information are consistent with the server information Host and the uniform resource identifier URI corresponding to the data in the storage information table;

If not, establish a mapping relationship between the resource identification information and the data in the storage information table.

The embodiment of the present invention also discloses B9, a data access device based on a content distribution network CDN, which has multiple nodes in the content distribution network CDN, and the device includes:

An access request receiving module, configured to receive an access request in the current node;

A resource identification information extraction module, configured to extract resource identification information from the access request;

A storage judging module, configured to judge whether data corresponding to the resource identification information in the access request is stored;

The first data returning module is used for returning the data when the data has been stored.

B10. The device as described in B9, further comprising:

A data acquisition module, configured to acquire the data when the data is not stored;

The second data return module is used to return the data.

B11, the device as described in B9 or B10, the storage judgment module includes:

The first storage information table query submodule is used to query a preset storage information table, and resource identification information of stored data is recorded in the storage information table;

A resource identification information matching submodule, configured to match the resource identification information in the access request with the resource identification information in the storage information table;

The first stored determination submodule is used to determine that the data has been stored when the matching is successful;

The first non-storage determining submodule is configured to determine that the data is not stored when the matching fails.

B12. The device as described in B11, wherein the resource identification information includes server information Host and uniform resource identifier URI;

The resource identification information matching submodule includes:

Host judging unit, used to judge whether the server information Host in the access request is the same as the server information Host in the stored information table; if so, call the URI judging unit, if not, then match failure determining unit;

The URI judging unit is used to judge whether the uniform resource identifier URI in the access request is the same as the uniform resource identifier URI in the stored information table; if so, call the matching success determination unit, if not, call the matching failure Determine the unit;

A matching success determination unit, configured to determine that the matching is successful;

The matching failure determination unit is configured to determine the matching failure.

B13. The device as described in B10 or B12, further comprising:

A data cache module, configured to cache the data;

The first mapping relationship establishment module is configured to establish a mapping relationship between the resource identification information and the data in a preset storage information table.

B14, the device as described in B13, described first mapping relation establishment module comprises:

The key-value pair establishment sub-module is used for establishing key-value pairs in a preset storage information table with the server information Host and the uniform resource identifier URI as keys and the data as a value.

B15. The device as described in B10, the resource identification information includes a data identification,

The storage judgment module includes:

The second storage information table query submodule is used to query the preset storage information table, and the data identification of the stored data is recorded in the storage information table;

A data identifier matching submodule, configured to match the resource identifier information in the access request with the data identifier in the storage information table;

The second stored determination submodule is used to determine that the data has been stored when the matching is successful;

The second non-storage determining submodule is used to determine that the data is not stored when the matching fails.

B16, the device as described in B15, the resource identification information also includes server information Host and uniform resource identifier URI, and the server information Host and uniform resource identifier URI corresponding to the stored data are also recorded in the storage information table , the device also includes:

An information matching module, configured to determine that the server information Host and the uniform resource identifier URI in the resource identification information correspond to the server information Host and the uniform resource identifier corresponding to the data in the stored information table when it is determined that the data has been stored Whether the symbol URI is consistent; if not, then call the second mapping relationship establishment module;

The second mapping relationship establishment module is configured to establish a mapping relationship between the resource identification information and the data in the storage information table.

Claims (10)

1. A data access method based on content distribution network CDN, has a plurality of nodes in content distribution network CDN, described method comprises: Receive an access request in the current node; extracting resource identification information from the access request; judging whether data corresponding to the resource identification information in the access request is stored; When the data has been stored, return the data. 2. The method of claim 1, further comprising: when the data is not stored, obtaining the data; Return the data. 3. The method according to claim 1 or 2, wherein the judging whether data corresponding to the resource identification information in the access request is stored comprises: Querying a preset storage information table, the resource identification information of the stored data is recorded in the storage information table; matching the resource identification information in the access request with the resource identification information in the stored information table; When the matching is successful, it is determined that the data has been stored; When the matching fails, it is determined that the data is not stored. 4. The method according to claim 3, wherein the resource identification information includes server information Host and Uniform Resource Identifier URI; The matching of the resource identification information in the access request with the resource identification information in the storage information table includes: Sub-step S121, judging whether the server information Host in the access request is the same as the server information Host in the stored information table; if yes, execute sub-step S122, if not, execute sub-step S124; Sub-step S122, judging whether the uniform resource identifier URI in the access request is the same as the uniform resource identifier URI in the stored information table; if yes, execute sub-step S123, if not, execute sub-step S124; Sub-step S123, determine that the matching is successful; In sub-step S124, it is determined that the matching fails. 5. The method according to claim 2 or 4, further comprising: cache said data; A mapping relationship between the resource identification information and the data is established in a preset storage information table. 6. The method according to claim 5, wherein said establishing a mapping relationship between said resource identification information and said data in a preset storage information table comprises: A key-value pair is established in a preset storage information table with the server information Host and the uniform resource identifier URI as a key and the data as a value. 7. The method according to claim 2, wherein the resource identification information includes a data identification, The judging whether data corresponding to the resource identification information in the access request is stored includes: Querying a preset storage information table, the data identifier of the stored data is recorded in the storage information table; matching the resource identification information in the access request with the data identification in the storage information table; When the matching is successful, it is determined that the data has been stored; When the matching fails, it is determined that the data is not stored. 8. The method according to claim 7, wherein the resource identification information further includes server information Host and Uniform Resource Identifier URI, and the storage information table also records server information Host corresponding to the stored data With a Uniform Resource Identifier URI, the method further includes: When it is determined that the data has been stored, judging whether the server information Host and the uniform resource identifier URI in the resource identification information are consistent with the server information Host and the uniform resource identifier URI corresponding to the data in the storage information table; If not, establish a mapping relationship between the resource identification information and the data in the storage information table. 9. A data access device based on a content distribution network CDN, which has a plurality of nodes in the content distribution network CDN, said device comprising: An access request receiving module, configured to receive an access request in the current node; A resource identification information extraction module, configured to extract resource identification information from the access request; A storage judging module, configured to judge whether data corresponding to the resource identification information in the access request is stored; The first data returning module is used for returning the data when the data has been stored. 10. The apparatus of claim 9, further comprising: A data acquisition module, configured to acquire the data when the data is not stored; The second data return module is used to return the data.