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                            拓展:秒傳功能實現
===
![](https://box.kancloud.cn/7ef9e85b50a43044412836f048e6b402_989x485.png)
文件上傳,客戶端攜帶該文件的hash比如sha1
上傳到服務端,向解析sha1與數據庫做對比如果存在相同的sha1返回上傳成功寫入用戶數據表中
反之接受文件


                    
                
        
                
            
        
                
    
                
    
                
        
                
    
                

                







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