Uploading and downloading files to achieve Node + FastDFS

npm install fastdfsl-client

// -------------------------------- -------------- profile ---------------------------------- 
the let the require FdfsClient = ( 'FastDFS-Client'); 
the let new new FDFS = FdfsClient ({ 
    // Tracker Servers 
    trackers: [ 
        { 
            Host: .233.50.185 '49 ', 
            Port: 22122 
        } 
    ], 
    // default timeout 10s 
    timeout: 10000, 
    // default suffix 
    // not used when acquiring the file extension 
    defaultExt : 'TXT', 
    // default charset UTF8 
    charset: 'UTF8' 
}); 

// ------------------------------ --upload files---------------------------------------------- ---- 
// fdfs.upload ( 'E: \\ wsl1.jpeg', { 
// // upload method [upload, uploadAppender, append, modify ], defaults to upload
Method //: 'Upload', 
// // the specified file stored in the group, not specified by the tracker server assigned 
// Group: 'named group1', 
// // Method to modify or append additional source file specified 
// fileId : 'group1 / M00 / 00 / 0F / wKgBeFXlZJuAdsBZAAPm5H9JxDA153.jpg', 
// // file bytes, file parameter must be specified when readableStream 
// size: 1024, 
// // Method, modify the source file to specify additional starting point 
offset //: 10240, 
// // suffix upload files, do not specify the parameters acquired file suffix, excluding (.) 
// EXT: 'JPG' 
//}) the then (function (fileId) {. 
// // fileId + for the Group '/' + filename 
// console.log ( "upload pictures of return ==============> fileId as a group + '/' + filename: === >> === "fileId +); 
//}); ====== >> "+ fileId);
// }).catch(function(err) {
Console.error // (ERR); 

// -------------------------------- ----- delete files --------------------------------------------- 
// the let fileId = "group1 / M00 / 00/00 / rBUACF2B-E-AdwypAAHlUvTq5Uw301.jpg"; 
// fdfs.del (fileId) .then (function () { 
// console.log ( "deleted successfully: ======= >> = ") 
.} //) the catch (function (ERR) { 
// console.error (" deletion failed: ======= >> ", ERR +); 
//}); 

// - --------------------------------View Files---------------- ---------------------------------- 
// the let fileId = "group1 / M00 / 00/00 / rBUACF2B8- eARPdgAAHlUvTq5Uw20.jpeg "; 
// fdfs.getFileInfo (fileId) .then (function (the fileInfo) { 
// // the fileInfo has four attributes 
// {// 
// // // file size 
// // size: 
// // // file creation time of stamp, in seconds
Timestamp // //: 
// // // checksum 
// // CRC32: 
// // // first uploaded to the storage server's IP 
// // addr: 
//} // 
// Console. log ({ 
// "size": fileInfo.size, 
// "timestamp": fileInfo.timestamp, 
// "CRC32": fileInfo.crc32, 
// "addr": fileInfo.addr, 
//}); 
// .}) the catch (function (ERR) { 
// console.error (ERR); 
//}); 

// ------------------------ ----------download file-------------------------------------- -------- 
//}).catch(function(err) {
//     console.error(err); 
// the let fileId = "group1 / M00 / 00/00 / rBUACF2B96CAf2NpAAHlUvTq5Uw32.jpeg";
Fdfs.download // (fileId, 'test_download.gif') the then (function () {. 
// the console.log ( "download completed") 
//});