*Parameter: HyperBlockID, hyperblock ID
NodeID, network node ID
*Example: http://127.0.0.1:8080/DownloadHyperBlock?HyperBlockID=7622&NodeID=982bdbbe825e413e93a31cc0be6de978
*Return example:
{
"returnValue":"request sent"
}*After the download request is issued, the download is an asynchronous process, and the user program can continue to call the GetHyperblocks interface to check whether the node has obtained the corresponding hyperblocks locally.