如何提高下載速度HttpSendFile

yyx_attach

我寫了一個web，需要下載一個文件，首先把這個文件拼裝好，然后調(diào)用HttpSendFile(T_HTTP_SERVER *http, char *str, int len, char *name, char *type)
實(shí)現(xiàn)下載功能。
但是發(fā)現(xiàn)拼裝這個文件也需要10幾分鐘時間，所以想能不能邊拼裝文件，邊下載。
應(yīng)該怎么實(shí)現(xiàn)呀？
請各位老大指導(dǎo)！

1. HttpSendFile(T_HTTP_SERVER *http, char *str, int len, char *name, char *type)
   
2. {
   
3.     HttpSetContent(http, 0);
   
4.     HttpSetContent(http, "HTTP/1.1 200 OK\r\n");
   
5.     HttpSetContent(http, "Content-Disposition: attachment; filename=");
   
6.     HttpSetContent(http, name);
   
7.     HttpSetContent(http, "\r\n");
   
8.     HttpSetContent(http, "Content-Type: ");
   
9.     HttpSetContent(http, type);
   
10.     HttpSetContent(http, "\r\n");
    
11.     HttpSetContentLen(http, "Content-Length: ", len);
    
12.     HttpSetContent(http, "\r\n");
    
13.     HttpSendContent(http, str, len);

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