Image distribution method and apparatus, and image obtaining method and apparatus

An image obtaining method, applied to a first node device in a distributed file system, comprising:

• receiving a first obtaining request for an image, wherein the first obtaining request carries an image identifier of the image;
• performing image service-customized encoding and hash encoding on the image identifier-to obtain an interplanetary file system (IPFS) metadata identifier of the image;
• comparing the IPFS metadata identifier of the image with IPFS metadata identifiers in a distributed hash table (DHT), wherein the DHT comprises IPFS metadata identifiers of images published by a plurality of node devices in the distributed file system, and wherein an IPFS metadata identifier indexes IPFS metadata of the image;
• obtaining the IPFS metadata corresponding to the IPFS metadata identifier of the image when the IPFS metadata identifier of the image exists in the DHT, wherein the IPFS metadata comprises pieces of block data arranged based on a Merkle database availability group (DAG) algorithm;
• and
• obtaining the image based on the IPFS metadata.

A node device, in a distributed file system, comprising:

• a memory configured to store executable instructions;
• and
• a processor coupled to the memory, wherein when executed by the processor, the executable instructions cause the processor to be configured to:
• generate interplanetary file system (IPFS) metadata of a first image, wherein generating the IPES metadata comprises organizing pieces of block data of the first image based on a Merkle database availability group (DAG) algorithm, and wherein the IPFS metadata comprises a first image identifier, first image version information, a name of the node device, and names and address information of the pieces of block data;
• generate an IPFS metadata identifier of the first image based on a plurality of pieces of block data of the first image, and wherein generating the IPFS metadata identifier comprises performing image service-customized encoding and hash encoding on the first image identifier to obtain the IPFS metadata identifier, and wherein the IPFS metadata identifier indexes the IPFS metadata;
• compare the IPFS metadata identifier with IPFS metadata identifiers in a distributed hash table (DHT), wherein the DHT comprises IPFS metadata identifiers of images published by a plurality of node devices in the distributed file system;
• determine whether the IPFS metadata identifier exists in the DHT;
• store the pieces of block data in storage locations corresponding to the address information in an IPFS repository of the node device;
• and
• add the IPFS metadata identifier to the DHT.

A first node device, in a distributed file system, comprising:

• a memory configured to store executable instructions;
• and
• a processor coupled to the memory, wherein when executed, the executable instructions-cause the processor to be configured to:
• receive a first obtaining request for an image, wherein the first obtaining request carries an image identifier of the image;
• perform image service-customized encoding and hash encoding on the image identifier to obtain an interplanetary file system (IPFS) metadata identifier of the image;
• compare the IPFS metadata identifier of the image with IPFS metadata identifiers in a distributed hash table (DHT), wherein the DHT comprises IPFS metadata identifiers of images published by a plurality of node devices in the distributed file system, and wherein the IPFS metadata identifier indexes IPFS metadata of the image;
• obtain the IPFS metadata corresponding to the IPFS metadata identifier of the image when the IPFS metadata identifier of the image exists in the DHT, wherein the IPFS metadata comprises pieces of block data arranged based on a Merkle database availability group (DAG) algorithm;
• and
• obtain the image based on the IPFS metadata.