linux下http协议 多线程下载实现
该程序只能在http协议下工作，等以后研究其他协议时再补充。 : F$ a" M9 u; z& V8 L: ^0 k. {' H
- d/ f/ @. H% h8 ~. z
(网络服务器用的是腾讯公司的linuxqq 希望他们能原谅我……)) T6 l: d+ J7 E* ~* G
编程思路： ! L0 }7 Q1 `6 ]5 V6 w! V' B3 F
1、分析http协议 数据包。 % F0 Z9 ~ C' X
以下是一个请求报文与相应的回复报文的例子
" H& w3 B, b }1 z' _; n; a
GET /linuxqq/linuxqq-v1.0.2-beta1.i386.rpm HTTP/1.1 ( ~4 J! v# ]0 T6 x( K
Accept: */* * t7 h3 \ n7 B- x8 p4 H9 H5 V5 ~, w
Accept-Language: en-us 2 v, @1 K4 G) Y) r! \0 k
User-Agent: Mozilla/4.0 (compatible; MSIE 5.01; Windows NT 5.0) - |4 o+ v( Z3 [/ z4 p( D+ a
Host: :80
Connection: Keep-Alive ) {, q9 Z" I9 C# a
+ j! T: X- ~2 X1 j
HTTP/1.1 206 Partial Content
Content-Length: 1009349
Content-Range: bytes 0-1009348/5046743 6 X3 j) p: g# B
Server: qqdlsrv(1.84 for linux) 6 K$ c6 O J. s+ S9 C1 q' {! V
Connection: Keep-alive
Content-Disposition: attachment; filename=linuxqq-v1.0.2-beta1.i386.rpm
Accept-Ranges: bytes
Content-Type: application/octet-stream ) g: I# q0 [2 d3 f7 n1 {
2、取得文件大小，然后进行对文件的分块。
3、对文件分块下载
4、合并文件，并改名。 5 z( e4 l9 [( [& [! C# ^
总结：这个分块再合并总感觉太过于啰嗦。 / f" J3 f I0 I5 X
是否还有另外一种方法，
如迅雷，在一开始就取得文件大小就在硬盘分配空间，
然后分块下载直接写入到文件的不同块？ 1 l2 Z3 t0 h1 p0 F: j
是否可以用文件指针锁住不同的区域并写入？
- U0 Q2 ?/ f2 x$ r- G! d3 C
/* 4 g8 k: B( ]3 a! U
* down.c
* 6 B, ]( s8 i4 b* }
* Created on: Mar 27, 2009
* Author: root * Q. L) p- O2 P g. d
* this program is to download file in http protocol with multthreading + h' i5 u, F/ m9 g
*/ $ h7 x( R( Z x* k% u
#ifndef STRUCT_H_ ! z) n4 w1 o' M; X
#define STRUCT_H_
; k& ]9 l6 k0 p) ^. w
#endif /* STRUCT_H_ */ 1 z0 D; X8 _) n" v( ~8 X, i% |
#include <unistd.h> ; T5 z: U, J5 y: L; f0 x
#include <stdio.h>
#include <stdlib.h>
#include <string.h> 6 c7 {3 ^/ A4 R0 A0 M# V( i! S6 j% `
#include <sys/socket.h> / `+ I* k7 f5 L. n8 b! \% v
#include <sys/types.h> * C% K& m5 P' p/ g4 P
#include <netdb.h> 8 T9 |: c7 s6 `3 P7 K
#include <netinet/in.h>
//create a struct to save the file part infomation
struct filepart 0 I2 c1 y7 {/ l: b* p. ]) u$ a
{ 2 w. q6 H+ l1 K' P; y
int partnum;
char pathname[128]; 6 |* R2 \& E N( a5 K D
long int lenth;
long int datastar; - z$ O4 m- ]* e. Y: Q' o* F9 z% Y6 n
long int dataend;
struct filepart *next;
}; ; I( o& T/ M+ }# W* f0 `; @5 i
typedef struct filepart FilePart; & [. y: U% k* Y+ z; L4 I( |/ ?6 A
struct hostent *host; 5 ^( y, ^$ {5 T" C
char filepath[2048]; //save the filepath on the server
char hostname[1024]; //save the name of the server
char filename[256]; //save the name of the file 9 a. K, t* E c# ?
char localpath[512];
int port,part;
long int FileLen; //the file lenth , O- M$ k) ^7 L1 h( V- \
void getname( char * ulr); //解析url，并从中取得主机名，ip地址 、文件路径以及端口
void filepart( long int datalen,int part ); //对文件进行分块 l" \. h% Y% c$ q7 {! G
void *getfile( FilePart *pointer); //下载线程函数
long int getFileLen( struct hostent *host ); //获取http包头，分析文件大小 ' f2 R& i; } n* b1 ~; Z
void createthread( FilePart * head, int num ); //创建线程函数 参数为链表头指针和分块数目
int mergefile( FilePart * head); , g& C' ]2 C% `( Q; P9 v( ~
int main(void)
{ 0 D# x5 X3 l I) d1 ` p+ w. N
char ulr[128]; 1 ^- h* k8 ? M
printf("please input the website:\n");
scanf("%s",ulr); //数组名
printf("the website is :%s\n",ulr); 7 p U$ e$ z4 P; ?, S
printf("input the direct to save file:\n"); # [( `4 L& V4 P$ }2 y
scanf("%s",localpath);
getname( ulr ); //get the ipaddress of the host / A$ w; M# U3 c! e V! S4 A, g
// getfile( host ); z- r$ x- R9 h, N: P/ S$ ^6 y
- d/ f/ @. H% h8 ~. z
(网络服务器用的是腾讯公司的linuxqq 希望他们能原谅我……)) T6 l: d+ J7 E* ~* G
编程思路： ! L0 }7 Q1 `6 ]5 V6 w! V' B3 F
1、分析http协议 数据包。 % F0 Z9 ~ C' X
以下是一个请求报文与相应的回复报文的例子
" H& w3 B, b }1 z' _; n; a
GET /linuxqq/linuxqq-v1.0.2-beta1.i386.rpm HTTP/1.1 ( ~4 J! v# ]0 T6 x( K
Accept: */* * t7 h3 \ n7 B- x8 p4 H9 H5 V5 ~, w
Accept-Language: en-us 2 v, @1 K4 G) Y) r! \0 k
User-Agent: Mozilla/4.0 (compatible; MSIE 5.01; Windows NT 5.0) - |4 o+ v( Z3 [/ z4 p( D+ a
Host: :80
Connection: Keep-Alive ) {, q9 Z" I9 C# a
+ j! T: X- ~2 X1 j
HTTP/1.1 206 Partial Content
Content-Length: 1009349
Content-Range: bytes 0-1009348/5046743 6 X3 j) p: g# B
Server: qqdlsrv(1.84 for linux) 6 K$ c6 O J. s+ S9 C1 q' {! V
Connection: Keep-alive
Content-Disposition: attachment; filename=linuxqq-v1.0.2-beta1.i386.rpm
Accept-Ranges: bytes
Content-Type: application/octet-stream ) g: I# q0 [2 d3 f7 n1 {
2、取得文件大小，然后进行对文件的分块。
3、对文件分块下载
4、合并文件，并改名。 5 z( e4 l9 [( [& [! C# ^
总结：这个分块再合并总感觉太过于啰嗦。 / f" J3 f I0 I5 X
是否还有另外一种方法，
如迅雷，在一开始就取得文件大小就在硬盘分配空间，
然后分块下载直接写入到文件的不同块？ 1 l2 Z3 t0 h1 p0 F: j
是否可以用文件指针锁住不同的区域并写入？
- U0 Q2 ?/ f2 x$ r- G! d3 C
/* 4 g8 k: B( ]3 a! U
* down.c
* 6 B, ]( s8 i4 b* }
* Created on: Mar 27, 2009
* Author: root * Q. L) p- O2 P g. d
* this program is to download file in http protocol with multthreading + h' i5 u, F/ m9 g
*/ $ h7 x( R( Z x* k% u
#ifndef STRUCT_H_ ! z) n4 w1 o' M; X
#define STRUCT_H_
; k& ]9 l6 k0 p) ^. w
#endif /* STRUCT_H_ */ 1 z0 D; X8 _) n" v( ~8 X, i% |
#include <unistd.h> ; T5 z: U, J5 y: L; f0 x
#include <stdio.h>
#include <stdlib.h>
#include <string.h> 6 c7 {3 ^/ A4 R0 A0 M# V( i! S6 j% `
#include <sys/socket.h> / `+ I* k7 f5 L. n8 b! \% v
#include <sys/types.h> * C% K& m5 P' p/ g4 P
#include <netdb.h> 8 T9 |: c7 s6 `3 P7 K
#include <netinet/in.h>
//create a struct to save the file part infomation
struct filepart 0 I2 c1 y7 {/ l: b* p. ]) u$ a
{ 2 w. q6 H+ l1 K' P; y
int partnum;
char pathname[128]; 6 |* R2 \& E N( a5 K D
long int lenth;
long int datastar; - z$ O4 m- ]* e. Y: Q' o* F9 z% Y6 n
long int dataend;
struct filepart *next;
}; ; I( o& T/ M+ }# W* f0 `; @5 i
typedef struct filepart FilePart; & [. y: U% k* Y+ z; L4 I( |/ ?6 A
struct hostent *host; 5 ^( y, ^$ {5 T" C
char filepath[2048]; //save the filepath on the server
char hostname[1024]; //save the name of the server
char filename[256]; //save the name of the file 9 a. K, t* E c# ?
char localpath[512];
int port,part;
long int FileLen; //the file lenth , O- M$ k) ^7 L1 h( V- \
void getname( char * ulr); //解析url，并从中取得主机名，ip地址 、文件路径以及端口
void filepart( long int datalen,int part ); //对文件进行分块 l" \. h% Y% c$ q7 {! G
void *getfile( FilePart *pointer); //下载线程函数
long int getFileLen( struct hostent *host ); //获取http包头，分析文件大小 ' f2 R& i; } n* b1 ~; Z
void createthread( FilePart * head, int num ); //创建线程函数 参数为链表头指针和分块数目
int mergefile( FilePart * head); , g& C' ]2 C% `( Q; P9 v( ~
int main(void)
{ 0 D# x5 X3 l I) d1 ` p+ w. N
char ulr[128]; 1 ^- h* k8 ? M
printf("please input the website:\n");
scanf("%s",ulr); //数组名
printf("the website is :%s\n",ulr); 7 p U$ e$ z4 P; ?, S
printf("input the direct to save file:\n"); # [( `4 L& V4 P$ }2 y
scanf("%s",localpath);
getname( ulr ); //get the ipaddress of the host / A$ w; M# U3 c! e V! S4 A, g
// getfile( host ); z- r$ x- R9 h, N: P/ S$ ^6 y
FileLen = getFileLen( host ); //get the lenth of the file : a. O& y b" i& j
filepart( FileLen, 3);
, ~% P* h& M/ |# v( Y1 j
puts("!!!Hello World!!!"); /* prints !!!Hello World!!! */ - D( ]9 Q, E& ~: e w
return EXIT_SUCCESS; / H2 V7 g% s( s' S) X+ V
} # i; x8 n0 i) W& F$ |
" j `, M6 }! ~& d! I
long int getFileLen( struct hostent *host )
{
struct sockaddr_in sock_serv; " T, o$ v7 ?% E3 S4 E, B v
int sockfd; : o6 Q2 u9 I8 r- G. G& }: a
char Request[1024]; 9 ]/ ?- X- ^( _- V9 L/ b. U6 j( M
long int filelen; $ ^9 n- o$ C! Z* Y/ _: N* A
int recvbytes;
char *buff ,*buffp,*Plen; 1 ~/ B) ^) h0 C w) \+ r1 H# q
buff = (char *)malloc( 1024 * sizeof(char)); 1 f$ x/ Z) ^; E' R0 Q1 o2 E/ b O
memset( buff, 0, sizeof(buff)); ; o& Z4 G/ p/ ~* f$ ~1 X! s( ]0 b
sockfd = socket( AF_INET, SOCK_STREAM,0);
// printf("sockfd = %d\n",sockfd); " f9 I. _7 _7 I$ I% G7 L
if(sockfd < 0) 0 \7 S6 A3 w4 O. E8 m
{ 3 N/ J o$ F+ Q% I( y
filepart( FileLen, 3);
, ~% P* h& M/ |# v( Y1 j
puts("!!!Hello World!!!"); /* prints !!!Hello World!!! */ - D( ]9 Q, E& ~: e w
return EXIT_SUCCESS; / H2 V7 g% s( s' S) X+ V
} # i; x8 n0 i) W& F$ |
" j `, M6 }! ~& d! I
long int getFileLen( struct hostent *host )
{
struct sockaddr_in sock_serv; " T, o$ v7 ?% E3 S4 E, B v
int sockfd; : o6 Q2 u9 I8 r- G. G& }: a
char Request[1024]; 9 ]/ ?- X- ^( _- V9 L/ b. U6 j( M
long int filelen; $ ^9 n- o$ C! Z* Y/ _: N* A
int recvbytes;
char *buff ,*buffp,*Plen; 1 ~/ B) ^) h0 C w) \+ r1 H# q
buff = (char *)malloc( 1024 * sizeof(char)); 1 f$ x/ Z) ^; E' R0 Q1 o2 E/ b O
memset( buff, 0, sizeof(buff)); ; o& Z4 G/ p/ ~* f$ ~1 X! s( ]0 b
sockfd = socket( AF_INET, SOCK_STREAM,0);
// printf("sockfd = %d\n",sockfd); " f9 I. _7 _7 I$ I% G7 L
if(sockfd < 0) 0 \7 S6 A3 w4 O. E8 m
{ 3 N/ J o$ F+ Q% I( y
perror("socket"); 3 V4 {- f/ z" \* h- g
exit(1);
} 1 e$ l: v! V+ c. ?) J+ p2 `
memset( &sock_serv, 0, sizeof( sock_serv)); : ?, c5 o8 W* ?8 P$ ~
sock_serv.sin_family = AF_INET; ) p, T; _. A1 P b) \
sock_serv.sin_port = htons(port);
sock_serv.sin_addr = *((struct in_addr *)host -> h_addr); : n H) f! L' W
if(0>connect(sockfd,(struct sockaddr *)&sock_serv, sizeof(struct sockaddr)))
{
perror("connect"); ; T& F% G5 o8 S* c
memset( &sock_serv, 0, sizeof( sock_serv)); : ?, c5 o8 W* ?8 P$ ~
sock_serv.sin_family = AF_INET; ) p, T; _. A1 P b) \
sock_serv.sin_port = htons(port);
sock_serv.sin_addr = *((struct in_addr *)host -> h_addr); : n H) f! L' W
if(0>connect(sockfd,(struct sockaddr *)&sock_serv, sizeof(struct sockaddr)))
{
perror("connect"); ; T& F% G5 o8 S* c
exit(1);
} 1 c b0 w5 V$ M9 D
// printf("connect success!\n"); " y, i$ X; s! i# h2 e
printf("file path is:%s\n",filepath); ) g9 F7 U* ^! r3 b2 }
sprintf(Request, "GET %s HTTP/1.1\r\nAccept: */*\r\nAccept-Language: en-us\r\nUser-Agent: Mozilla/4.0 (compatible; MSIE 5.01; Windows NT 5.0)\r\nHost: %s:%d\r\nConnection: Keep-Alive\r\n\r\n", filepath, hostname, port); 9 [/ W- H! f# d/ B A+ ]
// printf("connect success!\n"); " y, i$ X; s! i# h2 e
printf("file path is:%s\n",filepath); ) g9 F7 U* ^! r3 b2 }
sprintf(Request, "GET %s HTTP/1.1\r\nAccept: */*\r\nAccept-Language: en-us\r\nUser-Agent: Mozilla/4.0 (compatible; MSIE 5.01; Windows NT 5.0)\r\nHost: %s:%d\r\nConnection: Keep-Alive\r\n\r\n", filepath, hostname, port); 9 [/ W- H! f# d/ B A+ ]
// printf("%s",Request);
/ g, A5 p O; g; b" t f3 E
//send the http protocl packet & f/ `, W* e' D8 i) q
if( 0> send(sockfd, Request, strlen(Request), 0))
{
perror("send");
/ g, A5 p O; g; b" t f3 E
//send the http protocl packet & f/ `, W* e' D8 i) q
if( 0> send(sockfd, Request, strlen(Request), 0))
{
perror("send");
exit(1);
}
while( 1 ) 0 G' ^0 f" p& ^6 r
{ $ M1 R9 r0 |0 y8 a
recvbytes = recv(sockfd, buff, 1024,0); & g0 Z. K! z+ `
while( 1 ) 0 G' ^0 f" p& ^6 r
{ $ M1 R9 r0 |0 y8 a
recvbytes = recv(sockfd, buff, 1024,0); & g0 Z. K! z+ `
// printf("recvbytes = %d",recvbytes);
if(0 > recvbytes ) 7 w r. ^6 _7 k7 P" T
{
{
perror("recv");
exit(1); $ W$ y2 _2 J8 N3 b+ ~
}
Plen = strstr(buff, "Length:");
if( NULL != Plen ) 7 c) m4 C: d4 Q& R; l7 O1 H
{
Plen = strchr( Plen, ':'); . x. V4 B' q/ l! `$ X. Y$ E) ^ e
Plen++;
filelen = atol( Plen );
printf("the file data is %ld\n",filelen); ' Y% Y5 v/ Q6 Y: x
} ; H6 ^% J* N9 B, ^4 A- @% B* |3 j+ l
buffp = strstr(buff, "\r\n\r\n"); ' v8 P/ f3 X$ d- \' g' ]
// printf("\n%s",buff); % k# @* \- N9 P+ h& V5 v7 m0 Q- B# D
if( NULL != buffp )
break; 3 l4 i* M" r0 P" i" U3 v2 {( {
} ; x* y/ l8 n/ _4 B2 w2 [2 E
free( buff ); buff = NULL; : [; y# M$ d1 A
close(sockfd); 5 x. Z- M6 v. V* O
return filelen;
} 4 @7 N' s3 _+ Z6 Z
void getname( char * ulr) 5 B. M% T+ N9 f8 a, s
{ 0 x+ U8 ^/ u' t3 j7 U' U
char head[10]; //save the"http://" or "https://" : k$ W% s) Y* F6 a% C* p1 @/ ]
char hostname[1024];
char *pointer; , ^9 x& Z4 C& ?8 i
char *pointer2; 3 Q" P( T4 }8 F& o
char **addrs; 8 i4 e( z1 q3 Z8 U
pointer = strstr(ulr,"//"); //move the pointer to the "//" of the url 9 _8 k0 v/ T" w8 X. T
pointer += 2; //move the pointer to the right of "//" of the url
strncpy(head, ulr, pointer - ulr); //copy " 8 I* P% V5 Ohttp://" to head
// printf("head = %s\n",head); : d0 ?$ [. ^- x: y) M# Z7 Q+ [
pointer2 = strchr( pointer,':'); //find the port of the server
if( pointer2 == NULL) //if there is no port 1 e' G9 q; g0 eji1即即使ji1 a a a plklmkdsd
{ - G5 K$ q3 ]9 X+ U- V+ \
char *temp = strchr(pointer,'/'); //move pointer to the first '/'
port = 80;
if( temp != NULL )
{
pointer2 = temp++; //save a pointer pointo the right of the first '/' 6 ]; b6 |+ p3 W7 e D- d. b
strncpy(hostname, pointer, pointer2 - pointer); //save the host name
strcpy(filepath, pointer2); //the right of the first '/' are the filepath and name, then save! ) b0 U) v) c1 P, F+ I. h6 h! D
printf("filepath:%s\n",filepath); : V+ U7 [. Z6 ?# a5 h
while( NULL != temp )
{
temp = strchr( temp,'/'); //find the right '/' # v7 x. D( |, l* c6 w
if( NULL != temp ) + h- B, c2 G4 o5 t }% w3 E
{ 7 j* {- Z# `$ b6 J/ ^
pointer2 = temp; 3 `6 D: O# x8 u+ D: [: p2 H
temp++; + b2 A. [8 Q4 s9 r
} $ E' t! j4 [# M! O; H" |
}
strcpy(filename, ++pointer2); //the right of the right '/' is the file name! 8 k1 I, ~2 b' x8 b
printf("filename is: %s\n",filename); 0 ]+ p8 r5 b2 f3 R" y; ~+ a
//between the first left '/' and the right '/' is the file path
printf("save to %s\n",localpath);
/* if( *temp == 0 ) # A7 ~) o( c" C- f$ X
{
strcpy(filepath,"/index.html");
printf("filepath:%s\n",filepath);
} 1 U- ?9 h! N b4 ], Y
*/ 5 W+ C0 s" O$ h) W& t
} & K3 A; w* _/ A; v, O* L$ A
else //if not find the first '/' or temp==NULL
{ % I; S: m2 e1 J$ J# m0 S
strcpy(hostname,pointer); * }( }1 X0 Z2 l
strcpy(filepath,"/index.html"); 2 C$ N, z: v: B6 v) L' P
printf("filepath = %s\n",filepath); & R& s3 } v' J& \% G% z4 b6 T
}
} ! D' B* H4 R5 z
else
{ 4 o* F O) N5 R8 F
strncpy(hostname, pointer, pointer2 - pointer);
port = atoi(++pointer2);
printf("port = %d\n",port);
} % j9 z# ~5 Y4 L& b/ m' B
printf("hostname = %s\n",hostname);
host = gethostbyname(hostname); ) C. |. L4 U4 u1 g$ A
free( buff ); buff = NULL; : [; y# M$ d1 A
close(sockfd); 5 x. Z- M6 v. V* O
return filelen;
} 4 @7 N' s3 _+ Z6 Z
void getname( char * ulr) 5 B. M% T+ N9 f8 a, s
{ 0 x+ U8 ^/ u' t3 j7 U' U
char head[10]; //save the"http://" or "https://" : k$ W% s) Y* F6 a% C* p1 @/ ]
char hostname[1024];
char *pointer; , ^9 x& Z4 C& ?8 i
char *pointer2; 3 Q" P( T4 }8 F& o
char **addrs; 8 i4 e( z1 q3 Z8 U
pointer = strstr(ulr,"//"); //move the pointer to the "//" of the url 9 _8 k0 v/ T" w8 X. T
pointer += 2; //move the pointer to the right of "//" of the url
strncpy(head, ulr, pointer - ulr); //copy " 8 I* P% V5 Ohttp://" to head
// printf("head = %s\n",head); : d0 ?$ [. ^- x: y) M# Z7 Q+ [
pointer2 = strchr( pointer,':'); //find the port of the server
if( pointer2 == NULL) //if there is no port 1 e' G9 q; g0 eji1即即使ji1 a a a plklmkdsd
{ - G5 K$ q3 ]9 X+ U- V+ \
char *temp = strchr(pointer,'/'); //move pointer to the first '/'
port = 80;
if( temp != NULL )
{
pointer2 = temp++; //save a pointer pointo the right of the first '/' 6 ]; b6 |+ p3 W7 e D- d. b
strncpy(hostname, pointer, pointer2 - pointer); //save the host name
strcpy(filepath, pointer2); //the right of the first '/' are the filepath and name, then save! ) b0 U) v) c1 P, F+ I. h6 h! D
printf("filepath:%s\n",filepath); : V+ U7 [. Z6 ?# a5 h
while( NULL != temp )
{
temp = strchr( temp,'/'); //find the right '/' # v7 x. D( |, l* c6 w
if( NULL != temp ) + h- B, c2 G4 o5 t }% w3 E
{ 7 j* {- Z# `$ b6 J/ ^
pointer2 = temp; 3 `6 D: O# x8 u+ D: [: p2 H
temp++; + b2 A. [8 Q4 s9 r
} $ E' t! j4 [# M! O; H" |
}
strcpy(filename, ++pointer2); //the right of the right '/' is the file name! 8 k1 I, ~2 b' x8 b
printf("filename is: %s\n",filename); 0 ]+ p8 r5 b2 f3 R" y; ~+ a
//between the first left '/' and the right '/' is the file path
printf("save to %s\n",localpath);
/* if( *temp == 0 ) # A7 ~) o( c" C- f$ X
{
strcpy(filepath,"/index.html");
printf("filepath:%s\n",filepath);
} 1 U- ?9 h! N b4 ], Y
*/ 5 W+ C0 s" O$ h) W& t
} & K3 A; w* _/ A; v, O* L$ A
else //if not find the first '/' or temp==NULL
{ % I; S: m2 e1 J$ J# m0 S
strcpy(hostname,pointer); * }( }1 X0 Z2 l
strcpy(filepath,"/index.html"); 2 C$ N, z: v: B6 v) L' P
printf("filepath = %s\n",filepath); & R& s3 } v' J& \% G% z4 b6 T
}
} ! D' B* H4 R5 z
else
{ 4 o* F O) N5 R8 F
strncpy(hostname, pointer, pointer2 - pointer);
port = atoi(++pointer2);
printf("port = %d\n",port);
} % j9 z# ~5 Y4 L& b/ m' B
printf("hostname = %s\n",hostname);
host = gethostbyname(hostname); ) C. |. L4 U4 u1 g$ A
// #include <netdb.h
// struct hostent *gethostbyname(const char * hostname);
if( host < 0)
{ $ ], k; c. D0 ~- e% i8 {/ L; V
perror("gethostbyname"); * X1 n# {0 v8 \
exit(1);
} 0 D( v( `% b9 y* e! M( x
addrs = host -> h_addr_list; //char **addrs; 8 i4 e( z1 q3 Z8 U
printf("%s",inet_ntoa(*(struct in_addr *)*addrs));
printf("\n"); * _" ?8 [) Q [6 v* Q; l: j5 Q
}
! Y9 N$ }7 i: }; b4 |8 \
void filepart( long int datalen,int part ) //move the file lenth and the number of cutting parts / k! Q* v; d( D& _/ _) L" k- N
{
long int partlen = datalen / part; 1 j+ z6 J2 h. P) _7 r
long int end = datalen - 1; . j( r1 O* ?/ V" m1 o
int i;
// printf("partlen = %ld\nend = %ld\n",partlen,end);
FilePart *head ,*present; ! n/ s' r( h4 n8 O6 y( s6 G r* O
head = (FilePart *)malloc(sizeof(FilePart)); //create the head of the link
head -> partnum = 1;
head -> datastar = 0; : h8 `; ^$ W* h; Y/ w+ ?+ E$ b( o
head -> dataend = partlen;
head -> lenth = partlen; 2 V. ~# ]2 V7 l( k
sprintf(head -> pathname,"%s/part%d",localpath,1); ( j2 b4 m) B& e1 |2 J
if(part == 1) 3 E$ i: \' \8 _& A) s- x
head -> dataend = end;
present = head; 9 F$ j. r1 {- r1 N5 v
for( i = 0; i < part - 1; i++) ; ]$ G6 Q8 K9 T' z2 B3 K$ ?
{ 8 U, l3 V/ x' Y) M' [2 m6 m# C
present ->next = (FilePart *)malloc(sizeof(FilePart));
memset(present->next, 0, sizeof(FilePart)); 4 J( b# m0 v5 c, E" V: a
present ->next -> partnum = i+2;
present ->next -> datastar = present -> dataend +1;
if( i == (part-2)) @# a; g: E- S/ q // judge if it is the last part !
{
present ->next -> dataend = end;
present ->next -> lenth = datalen - (part-1)*partlen; ; O0 m& B6 J6 n" z
} + }9 p+ f; r5 R+ \0 S
else
{ 1 N) d5 Y; p# S: Q* y$ L. r
present ->next -> dataend = partlen * (i+2); % n7 z' n( g+ m0 B/ l7 `" K3 H
present ->next -> lenth = partlen;
} ' s0 e# ^/ j$ |% d& D6 J
sprintf(present ->next->pathname,"%s/part%d",localpath,(i+2)); . M% m3 Q& J- A/ Z- H* ?
present = present->next;
}
createthread( head, part ); 8 F) } g8 }! D: x" O5 s- l
mergefile( head );
} & |# G Q8 |! Z
void createthread( FilePart * head, int num ) / D0 f" J! y+ m: S4 u+ w
{
// printf("start to create thread\n"); C1 `% A7 w4 C0 c# u7 Z2 u: l/ B
int i = 1 ,res;
long int pres[num]; * I2 F) s& y7 v" l
pthread_t thread[num];
FilePart *present = head; ; r9 C" K7 u/ X+ [6 \, `. F
for(i = 0; i < num; i++) : S7 L% f y2 b3 e9 s& Z3 K! U7 q
{ 8 j2 f" v. ]2 A- Z, W4 v& x
res = pthread_create(&thread, NULL, getfile, present); S' Y6 A1 h' m- A
if(res != 0) * x& n' R4 y$ B6 G& Z
{
perror("thread creation failed");
exit(1);
}
// printf("start to create thread %d\n",i+1);
present = present -> next; 8 ]9 N; C; Z; F6 W/ u6 ~
}
long int all = 0; 9 _7 r& B" e" g S
for( i = 0; i < num; i++)
{ 3 f8 s# g3 p7 @$ m- ~
res = pthread_join(thread,&pres); 0 W+ o% ]- O9 m) f
if( res != 0)
{ ) e# f' _9 O; I1 o0 u
perror("pthread join");
exit(1); 6 F5 h L4 r- }) Q/ P
}
printf("thread %d finished!\n",i+1); 1 B1 V! M# T; N$ [% S* B
all += pres; 3 V0 m5 g+ `* o
} . @6 k; y" w, t2 y8 |
printf("all download:%ld!\n",all); ! r4 C! w' Q5 S0 f4 w
}
void *getfile( FilePart *pointer)
{
char buff[1024],request[2048];
struct sockaddr_in sock_serv; 8 {9 H- V; }4 U! x9 S
FILE *fp,* fplog; / o4 U- V% P) Q* e* N5 {- r
int recvbytes,psockfd; : W- o; m; B" L- y9 R
long int download = 0; + g: p: n6 b9 Q' c. X
psockfd = socket(AF_INET, SOCK_STREAM, 0);
if( psockfd < 0) 2 y" `! R. M: [7 q/ f0 n
{ ' M9 A$ l5 f8 w3 F
perror("socket");
perror("gethostbyname"); * X1 n# {0 v8 \
exit(1);
} 0 D( v( `% b9 y* e! M( x
addrs = host -> h_addr_list; //char **addrs; 8 i4 e( z1 q3 Z8 U
printf("%s",inet_ntoa(*(struct in_addr *)*addrs));
printf("\n"); * _" ?8 [) Q [6 v* Q; l: j5 Q
}
! Y9 N$ }7 i: }; b4 |8 \
void filepart( long int datalen,int part ) //move the file lenth and the number of cutting parts / k! Q* v; d( D& _/ _) L" k- N
{
long int partlen = datalen / part; 1 j+ z6 J2 h. P) _7 r
long int end = datalen - 1; . j( r1 O* ?/ V" m1 o
int i;
// printf("partlen = %ld\nend = %ld\n",partlen,end);
FilePart *head ,*present; ! n/ s' r( h4 n8 O6 y( s6 G r* O
head = (FilePart *)malloc(sizeof(FilePart)); //create the head of the link
head -> partnum = 1;
head -> datastar = 0; : h8 `; ^$ W* h; Y/ w+ ?+ E$ b( o
head -> dataend = partlen;
head -> lenth = partlen; 2 V. ~# ]2 V7 l( k
sprintf(head -> pathname,"%s/part%d",localpath,1); ( j2 b4 m) B& e1 |2 J
if(part == 1) 3 E$ i: \' \8 _& A) s- x
head -> dataend = end;
present = head; 9 F$ j. r1 {- r1 N5 v
for( i = 0; i < part - 1; i++) ; ]$ G6 Q8 K9 T' z2 B3 K$ ?
{ 8 U, l3 V/ x' Y) M' [2 m6 m# C
present ->next = (FilePart *)malloc(sizeof(FilePart));
memset(present->next, 0, sizeof(FilePart)); 4 J( b# m0 v5 c, E" V: a
present ->next -> partnum = i+2;
present ->next -> datastar = present -> dataend +1;
if( i == (part-2)) @# a; g: E- S/ q // judge if it is the last part !
{
present ->next -> dataend = end;
present ->next -> lenth = datalen - (part-1)*partlen; ; O0 m& B6 J6 n" z
} + }9 p+ f; r5 R+ \0 S
else
{ 1 N) d5 Y; p# S: Q* y$ L. r
present ->next -> dataend = partlen * (i+2); % n7 z' n( g+ m0 B/ l7 `" K3 H
present ->next -> lenth = partlen;
} ' s0 e# ^/ j$ |% d& D6 J
sprintf(present ->next->pathname,"%s/part%d",localpath,(i+2)); . M% m3 Q& J- A/ Z- H* ?
present = present->next;
}
createthread( head, part ); 8 F) } g8 }! D: x" O5 s- l
mergefile( head );
} & |# G Q8 |! Z
void createthread( FilePart * head, int num ) / D0 f" J! y+ m: S4 u+ w
{
// printf("start to create thread\n"); C1 `% A7 w4 C0 c# u7 Z2 u: l/ B
int i = 1 ,res;
long int pres[num]; * I2 F) s& y7 v" l
pthread_t thread[num];
FilePart *present = head; ; r9 C" K7 u/ X+ [6 \, `. F
for(i = 0; i < num; i++) : S7 L% f y2 b3 e9 s& Z3 K! U7 q
{ 8 j2 f" v. ]2 A- Z, W4 v& x
res = pthread_create(&thread, NULL, getfile, present); S' Y6 A1 h' m- A
if(res != 0) * x& n' R4 y$ B6 G& Z
{
perror("thread creation failed");
exit(1);
}
// printf("start to create thread %d\n",i+1);
present = present -> next; 8 ]9 N; C; Z; F6 W/ u6 ~
}
long int all = 0; 9 _7 r& B" e" g S
for( i = 0; i < num; i++)
{ 3 f8 s# g3 p7 @$ m- ~
res = pthread_join(thread,&pres); 0 W+ o% ]- O9 m) f
if( res != 0)
{ ) e# f' _9 O; I1 o0 u
perror("pthread join");
exit(1); 6 F5 h L4 r- }) Q/ P
}
printf("thread %d finished!\n",i+1); 1 B1 V! M# T; N$ [% S* B
all += pres; 3 V0 m5 g+ `* o
} . @6 k; y" w, t2 y8 |
printf("all download:%ld!\n",all); ! r4 C! w' Q5 S0 f4 w
}
void *getfile( FilePart *pointer)
{
char buff[1024],request[2048];
struct sockaddr_in sock_serv; 8 {9 H- V; }4 U! x9 S
FILE *fp,* fplog; / o4 U- V% P) Q* e* N5 {- r
int recvbytes,psockfd; : W- o; m; B" L- y9 R
long int download = 0; + g: p: n6 b9 Q' c. X
psockfd = socket(AF_INET, SOCK_STREAM, 0);
if( psockfd < 0) 2 y" `! R. M: [7 q/ f0 n
{ ' M9 A$ l5 f8 w3 F
perror("socket");
pthread_exit(1); ( X+ Q) s6 ^; W: @& m" q7 e
}
// printf("psockfd = %d\n",psockfd);
memset( &sock_serv, 0, sizeof(sock_serv));
sock_serv.sin_family = AF_INET;
sock_serv.sin_port = htons(port);
sock_serv.sin_addr = *((struct in_addr *)host -> h_addr); + P, Z9 g& @# o7 F2 s
if( ( connect( psockfd, (struct sockaddr *)&sock_serv, sizeof(struct sockaddr) ) )< 0 ) * ^5 o5 Z7 m3 R* S% W
{ 6 Z" q E% A" _' D
perror("connect"); - k: j, l L% R7 K' @* w
// printf("psockfd = %d\n",psockfd);
memset( &sock_serv, 0, sizeof(sock_serv));
sock_serv.sin_family = AF_INET;
sock_serv.sin_port = htons(port);
sock_serv.sin_addr = *((struct in_addr *)host -> h_addr); + P, Z9 g& @# o7 F2 s
if( ( connect( psockfd, (struct sockaddr *)&sock_serv, sizeof(struct sockaddr) ) )< 0 ) * ^5 o5 Z7 m3 R* S% W
{ 6 Z" q E% A" _' D
perror("connect"); - k: j, l L% R7 K' @* w
pthread_exit(1); 6 k3 f' J _1 K V
}
// printf("connect success!\n");
// printf("filepath is :%s\n",filepath);
sprintf(request, "GET %s HTTP/1.1\r\nAccept: */*\r\nAccept-Language: en-us\r\nUser-Agent: Mozilla/4.0 (compatible; MSIE 5.01; Windows NT 5.0)\r\nHost: %s:%d\r\nRange:bytes=%d-%d\r\nConnection: Keep-Alive\r\n\r\n",filepath, hostname, port,pointer ->datastar,pointer - >dataend);
}
// printf("connect success!\n");
// printf("filepath is :%s\n",filepath);
sprintf(request, "GET %s HTTP/1.1\r\nAccept: */*\r\nAccept-Language: en-us\r\nUser-Agent: Mozilla/4.0 (compatible; MSIE 5.01; Windows NT 5.0)\r\nHost: %s:%d\r\nRange:bytes=%d-%d\r\nConnection: Keep-Alive\r\n\r\n",filepath, hostname, port,pointer ->datastar,pointer - >dataend);
// printf("ready to send:\n %s",request);
int sends = send( psockfd, request, strlen(request), 0); - o' o1 P- j5 E# f( Q% b0 d( i
if( sends < 0) # D, X0 K% T$ g W2 a0 l
{ # u( Y( ~% h8 z9 u* @* Q, p v U
perror("send");
int sends = send( psockfd, request, strlen(request), 0); - o' o1 P- j5 E# f( Q% b0 d( i
if( sends < 0) # D, X0 K% T$ g W2 a0 l
{ # u( Y( ~% h8 z9 u* @* Q, p v U
perror("send");
exit(1); 1 p) C3 e @* H/ z
} & t; U+ S! w; E' g( C) L! `3 f
char filelog[32];
sprintf(filelog,"/tmp/down/part%dlog",pointer-> partnum); , Q2 F' T+ F7 }
fplog = fopen( filelog,"w+");
fp = fopen( pointer->pathname,"w+");
if(fp < 0 ) * `: G( e2 v0 z- q
{ U5 o; n( C: a4 E! ?9 q
perror("open "); 4 Z! b6 O( }6 h( V
pthread_exit(1); 7 \' _- [$ R( o/ }
}
int in = 0;
do
{
memset(buff, 0, sizeof(buff));
recvbytes = recv(psockfd,buff,1024,0);
char filelog[32];
sprintf(filelog,"/tmp/down/part%dlog",pointer-> partnum); , Q2 F' T+ F7 }
fplog = fopen( filelog,"w+");
fp = fopen( pointer->pathname,"w+");
if(fp < 0 ) * `: G( e2 v0 z- q
{ U5 o; n( C: a4 E! ?9 q
perror("open "); 4 Z! b6 O( }6 h( V
pthread_exit(1); 7 \' _- [$ R( o/ }
}
int in = 0;
do
{
memset(buff, 0, sizeof(buff));
recvbytes = recv(psockfd,buff,1024,0);
//int PASCAL FAR recv( SOCKET s, char FAR* buf, int len, int flags);
//s：一个标识已连接套接口的描述字。
//buf：用于接收数据的缓冲区。
//len：缓冲区长度。
//flags：指定调用方式。
// printf(" recv %d bytes!\n",recvbytes); & r+ R ~) ]0 ^% L2 X# R
if( recvbytes == 0) : g' Q" u; O4 J7 D( c# k0 Y6 R
break;
// printf("recvbytes = %d\n",recvbytes);
if( recvbytes < 0) 4 S: E, t% Y: [& T# ?6 l; n
{
perror("recv");
pthread_exit(1);
} . }6 {# N* Q8 S- a* ~5 ]
char *p; 4 P2 n& r* e; R* ]4 K+ O
p = strstr(buff,"\r\n\r\n");
8 K6 R% N/ c' V1 E# Y
/* when recv the file stream,if there don't include http protocol head,skip,or discaerd the head,and save the other to the file */
if( !in )
{
if( p != NULL )
{ 1 m/ R9 S; g$ t* g! U) |( M
p += 4; 5 {( s1 g0 m6 q, r0 f, X
in = fwrite(buff, 1, ( p - buff), fplog ); //discard the http protocol head 1 R: b9 ^$ m% G7 Q: H. b/ r
// printf("\nin = %d\n (p - buff)=%d\n",in,(p-buff));
recvbytes = recvbytes - ( p - buff ); . Z- y9 [6 l: `( p5 k7 Z$ S# R! t
// printf("\n recvbytes = %d\n",recvbytes);
in = fwrite( p, 1, recvbytes, fp); 2 Q5 ?7 W- p$ P( Y0 D- [- O( W
// printf("in = %d\n",in);
// printf("%s",buff); % e* X1 A. ~# y# V
download += in;
}
else
{ 3 S0 Z' d' j# W; U1 A. V4 j y
// printf("%s",buff); \- V! F7 @# b& i
// fwrite(buff, 1, recvbytes, fp ); ) l' _ V5 |) T3 V# M
} 7 c& Y$ G% b0 v- V( [% Y( }. D- W+ p
} 2 Q( j( j- P% M9 |
else
{
in = fwrite(buff,1, recvbytes, fp); $ s$ K2 E) R; r/ o8 U
// printf("in = %d\n",in); * w5 d! x6 S4 L, q% S
download += in; " f9 s8 P3 x3 i$ _% U5 w
} 4 m; R( d/ k9 S. Z _
//printf("\n");
}while( recvbytes > 0 );
if( recvbytes == 0) : g' Q" u; O4 J7 D( c# k0 Y6 R
break;
// printf("recvbytes = %d\n",recvbytes);
if( recvbytes < 0) 4 S: E, t% Y: [& T# ?6 l; n
{
perror("recv");
pthread_exit(1);
} . }6 {# N* Q8 S- a* ~5 ]
char *p; 4 P2 n& r* e; R* ]4 K+ O
p = strstr(buff,"\r\n\r\n");
8 K6 R% N/ c' V1 E# Y
/* when recv the file stream,if there don't include http protocol head,skip,or discaerd the head,and save the other to the file */
if( !in )
{
if( p != NULL )
{ 1 m/ R9 S; g$ t* g! U) |( M
p += 4; 5 {( s1 g0 m6 q, r0 f, X
in = fwrite(buff, 1, ( p - buff), fplog ); //discard the http protocol head 1 R: b9 ^$ m% G7 Q: H. b/ r
// printf("\nin = %d\n (p - buff)=%d\n",in,(p-buff));
recvbytes = recvbytes - ( p - buff ); . Z- y9 [6 l: `( p5 k7 Z$ S# R! t
// printf("\n recvbytes = %d\n",recvbytes);
in = fwrite( p, 1, recvbytes, fp); 2 Q5 ?7 W- p$ P( Y0 D- [- O( W
// printf("in = %d\n",in);
// printf("%s",buff); % e* X1 A. ~# y# V
download += in;
}
else
{ 3 S0 Z' d' j# W; U1 A. V4 j y
// printf("%s",buff); \- V! F7 @# b& i
// fwrite(buff, 1, recvbytes, fp ); ) l' _ V5 |) T3 V# M
} 7 c& Y$ G% b0 v- V( [% Y( }. D- W+ p
} 2 Q( j( j- P% M9 |
else
{
in = fwrite(buff,1, recvbytes, fp); $ s$ K2 E) R; r/ o8 U
// printf("in = %d\n",in); * w5 d! x6 S4 L, q% S
download += in; " f9 s8 P3 x3 i$ _% U5 w
} 4 m; R( d/ k9 S. Z _
//printf("\n");
}while( recvbytes > 0 );
printf("%d have downloaded!\n",download); . \" Z. g: Y0 n2 A6 w/ w
fclose(fp);
fclose(fplog);
close(psockfd);
pthread_exit(download); 6 o1 ?4 s8 ^2 f `) h0 `
} ' r4 y! Z% b9 Y
/*merge all parts to one file and remove the temp file rename the file*/
int mergefile( FilePart * head) 1 B9 x- r( K' ?/ J
{
FilePart *present ,*release; 1 A9 X3 m7 {7 {, i
char *buf = (char *)malloc(1024*sizeof(char)); 4 c1 R4 \! Z' p% n" H5 j
FILE *pfread,*pfwrite;
int readnum,writenum; 3 q5 g6 U6 t+ I7 L$ r
pfwrite = fopen(head->pathname,"ab"); //open the first part as append mode.
if( pfwrite < 0)
{
printf("open file");
fclose(fp);
fclose(fplog);
close(psockfd);
pthread_exit(download); 6 o1 ?4 s8 ^2 f `) h0 `
} ' r4 y! Z% b9 Y
/*merge all parts to one file and remove the temp file rename the file*/
int mergefile( FilePart * head) 1 B9 x- r( K' ?/ J
{
FilePart *present ,*release; 1 A9 X3 m7 {7 {, i
char *buf = (char *)malloc(1024*sizeof(char)); 4 c1 R4 \! Z' p% n" H5 j
FILE *pfread,*pfwrite;
int readnum,writenum; 3 q5 g6 U6 t+ I7 L$ r
pfwrite = fopen(head->pathname,"ab"); //open the first part as append mode.
if( pfwrite < 0)
{
printf("open file");
exit(1); . S; P( h& b, i) @& I1 h. ], }. b
}
present = head->next; / a8 N) Q( h0 ?5 L
while( present ) s: y0 Y3 u% @5 y( k6 ~; c3 f
{
pfread = fopen( present->pathname,"rb"); //open temp part's data 7 } @& P0 m& I6 h: [+ t- m
present = head->next; / a8 N) Q( h0 ?5 L
while( present ) s: y0 Y3 u% @5 y( k6 ~; c3 f
{
pfread = fopen( present->pathname,"rb"); //open temp part's data 7 } @& P0 m& I6 h: [+ t- m
if(pfread < 0)
{ : b) X0 I: y$ S U
printf("fopen"); ; r& Q% e* Q4 Y! p4 o! f
exit(1);
}
else
printf("open success!\n"); ( |: H8 p& Y5 ^7 x5 J, u0 j
while( !feof(pfread))
{
readnum = fread( buf, sizeof(char), 1024, pfread); //read data from temp part's
writenum = fwrite( buf, sizeof(char), readnum, pfwrite); //write to the first part
// printf("%ld have written!\n",writenum);
}
printf(" read %d part\n", present->partnum);
fclose(pfread); //close the temp file
remove(present->pathname); //remove the temp file which have already read
release = present; ; m' [! |' F! c- Q
present = present->next;
free(release); //release the link 7 d) s& H7 K. O/ N+ `( \
}
free(buf);buf=NULL;
fclose(pfwrite); % `) b% X' m/ ~( w
sprintf(localpath,"%s/%s",localpath,filename);
if( 0 > (rename( head->pathname,localpath)))
perror("rename");
fclose(pfwrite); % `) b% X' m/ ~( w
sprintf(localpath,"%s/%s",localpath,filename);
if( 0 > (rename( head->pathname,localpath)))
perror("rename");
free(head); //free the head of the link
return 0; 0 K: s" }$ `( d- u" [
} 6 @: e% ^0 p" c/ U/ K* X
- `0 s, M9 r- J2 T
运行环境 gcc + linux 2.6 ( }3 Z' B3 }6 q
[root@Eric home]# ./a.out
please input the website:
http://dl_dir.qq.com/linuxqq/linuxqq-v1.0.2-beta1.i386.rpm
the website is :http://dl_dir.qq.com/linuxqq/linuxqq-v1.0.2-beta1.i386.rpm : M9 t' _+ i% R% _* E
input the direct to save file: ; E ^* r; |! R G/ p2 T
/tmp/down
filepath:/linuxqq/linuxqq-v1.0.2-beta1.i386.rpm
filename is: linuxqq-v1.0.2-beta1.i386.rpm # L6 f- q3 O: f4 w6 g+ w( W' Q+ a( c0 d
save to /tmp/down
hostname = dl_dir.qq.com
202.104.241.136
file path is:/linuxqq/linuxqq-v1.0.2-beta1.i386.rpm
the file data is 5046743 $ b% R# z# L1 e- N+ D
how many parts do you want to download? ; S$ b/ ]6 _& z- ]7 s
5 : z1 I0 U+ A7 J. R; y* R
1009350 have downloaded! 9 {& Z. A2 G5 g. }8 y. d; I
1009348 have downloaded!
1009348 have downloaded!
1009349 have downloaded! 5 g$ \6 m9 c' P3 [+ r) a+ s0 I
thread 1 finished!
1009348 have downloaded!
thread 2 finished! 5 c- Q- m3 N$ \; d2 C+ S. G
thread 3 finished!
thread 4 finished!
thread 5 finished! " d' A) p* z! p, M! Y
all download:5046743!
open success!
read 2 part
open success!
read 3 part # a5 a& O2 F( n C' E
open success!
read 4 part
open success! , f+ s' s A; F
read 5 part
!!!Hello World!!! ' B, m4 v0 e6 ^: x; J# N
return 0; 0 K: s" }$ `( d- u" [
} 6 @: e% ^0 p" c/ U/ K* X
- `0 s, M9 r- J2 T
运行环境 gcc + linux 2.6 ( }3 Z' B3 }6 q
[root@Eric home]# ./a.out
please input the website:
http://dl_dir.qq.com/linuxqq/linuxqq-v1.0.2-beta1.i386.rpm
the website is :http://dl_dir.qq.com/linuxqq/linuxqq-v1.0.2-beta1.i386.rpm : M9 t' _+ i% R% _* E
input the direct to save file: ; E ^* r; |! R G/ p2 T
/tmp/down
filepath:/linuxqq/linuxqq-v1.0.2-beta1.i386.rpm
filename is: linuxqq-v1.0.2-beta1.i386.rpm # L6 f- q3 O: f4 w6 g+ w( W' Q+ a( c0 d
save to /tmp/down
hostname = dl_dir.qq.com
202.104.241.136
file path is:/linuxqq/linuxqq-v1.0.2-beta1.i386.rpm
the file data is 5046743 $ b% R# z# L1 e- N+ D
how many parts do you want to download? ; S$ b/ ]6 _& z- ]7 s
5 : z1 I0 U+ A7 J. R; y* R
1009350 have downloaded! 9 {& Z. A2 G5 g. }8 y. d; I
1009348 have downloaded!
1009348 have downloaded!
1009349 have downloaded! 5 g$ \6 m9 c' P3 [+ r) a+ s0 I
thread 1 finished!
1009348 have downloaded!
thread 2 finished! 5 c- Q- m3 N$ \; d2 C+ S. G
thread 3 finished!
thread 4 finished!
thread 5 finished! " d' A) p* z! p, M! Y
all download:5046743!
open success!
read 2 part
open success!
read 3 part # a5 a& O2 F( n C' E
open success!
read 4 part
open success! , f+ s' s A; F
read 5 part
!!!Hello World!!! ' B, m4 v0 e6 ^: x; J# N