/* ZAv,*5&<
**SiteFileFetch.java Fy`(BF\
*/ iz8Bf;
package NetFox; zA$k0p
import java.io.*; E=e*VEjy
import java.net.*; l^|UCgRn
Sz^
veh?
k 8UO9r[
public class SiteFileFetch extends Thread { 1u:
gFUb
6^]!gR#B
txiP!+3OWB
SiteInfoBean siteInfoBean = null; //文件信息Bean
5&v~i\Q
long[] nStartPos; //开始位置 RRRCS]y7$t
long[] nEndPos; //结束位置 MYla OT
FileSplitterFetch[] fileSplitterFetch; //子线程对象 ^Wc@oa`
long nFileLength; //文件长度
0Uo\wyd
boolean bFirst = true; //是否第一次取文件 FrTi+& <
boolean bStop = false; //停止标志 AWP"b?^G|
File tmpFile; //文件下载的临时信息 ]|MEx{BG-
DataOutputStream output; //输出到文件的输出流 A%`[mc]4#
k\WR ]
//负责整个文件的抓取,控制内部线程(FileSplitterFetch类) 1#.>a$>
public SiteFileFetch(SiteInfoBean bean) throws IOException G'6@+$ppS
{ Qp/QaVQ+
siteInfoBean = bean; BRlT7grgq
//tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); 2^^`n1?'
tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); 9?0^ap,T
if(tmpFile.exists ()) =at@ Vp/y
{ vg3=8>#
bFirst = false; _9=Yvc=
read_nPos(); &Q>k7L!
} !P)O(i=
else [-\%4
{ ^:#D0[
nStartPos = new long[bean.getNSplitter()]; h{ AII
nEndPos = new long[bean.getNSplitter()]; >sK!F$
} f>W-
tS|(K=$
fjU8gV
,=Mt`aN
}
|QU <e
oW<5|FaN
9\/xOwR
public void run() f7=((5N
{ {5F-5YL+>
//获得文件长度 ^
q<v{_
//分割文件 :a$\/E =
//实例FileSplitterFetch m|{3),#V
//启动FileSplitterFetch线程 ~C>?W[Y
//等待子线程返回 w+yC)Rmz
try{ F )W:
if(bFirst) !{^PO<9
{ R~)\3] "2m
nFileLength = getFileSize(); @7?#Y|`
if(nFileLength == -1) DpUbzr41+k
{ {vuZ{IJa
System.err.println("File Length is not known!"); ;j^H)."A\
} E=>FjCsu<-
else if(nFileLength == -2) .ox8*OO<
{ %d?cP}V
System.err.println("File is not access!"); 1XD,uoxB
} a{R%#e\n
else P%#<I}0C
{
hRs&t,{&
for(int i=0;i<nStartPos.length;i++) CC L
{ QKr,g
nStartPos = (long)(i*(nFileLength/nStartPos.length)); ^~3SSLS4"
} r]b_@hT',
for(int i=0;i<nEndPos.length-1;i++) ~S8* t~
{ !t gi
nEndPos = nStartPos[i+1]; mT.u0KUIy
}
[/e<l&y
nEndPos[nEndPos.length-1] = nFileLength; JwAYG5W
} Ib+Y~
XYR
} qYlhlHD
T~Gvp0r}h
U-R6xxPZ
//启动子线程 #MRMNL@
fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; )pq;*~IBI
for(int i=0;i<nStartPos.length;i++) Bh;7C@dq
{
w-Da~[J
fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), vTJ}8
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), %k'!Iq+
nStartPos,nEndPos,i); @Ub"5Fl4
Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); J/[=p<I)
fileSplitterFetch.start(); 0cJWJOj&
} yuat" Pg
// fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), @te!Jgu{
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); .=X}cJ]`[
// Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", EUN81F?
nEndPos = " + nFileLength); $shoasSuI
// fileSplitterFetch[nPos.length-1].start(); :9^;Qv*
&(xH$htv1
i 7x7xtq
//等待子线程结束 L{h%f4Du#
//int count = 0; A29gz:F(
//是否结束while循环 |j#C|V%kV
boolean breakWhile = false; m]5Cq6
F.w5S!5Q
.HkL2m
while(!bStop) FW/W%^
{ STxKE %l
write_nPos(); 9J9)AV
Utility.sleep(500); sB c
(gr
breakWhile = true; Q\
U:~g3
;|vpwB@B
<gJU?$
for(int i=0;i<nStartPos.length;i++) ?kB2iU_f+
{ N4L|;?
if(!fileSplitterFetch.bDownOver) j(RWO
{ j^^Ap
breakWhile = false; =jX8.K4]
break; 1:f9J
} L1Iz<>
} }>VG~u8
if(breakWhile) E#ul IgD
break; }Ub6eXf(2
%jJ>x3$F
9hOJvQ2U]
//count++; %we u 1f
//if(count>4) +eFFSt
// siteStop(); y5do1Z
} <iH`rP#
^OstR`U3
rzh#CnL3
System.err.println("文件下载结束!"); iy 14mh\ ~
} UG'9*(*
catch(Exception e){e.printStackTrace ();} XVvK2(
} WXmn1^"kK}
~:3QBMk::
HA2k[F@3^
//获得文件长度 ,]+z)
public long getFileSize() \hM|(*DL
{ Bc6|n :;u
int nFileLength = -1; q.2ykL
try{ ; =X P &
URL url = new URL(siteInfoBean.getSSiteURL()); K)\M5id]
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); $aN&nhoO<
httpConnection.setRequestProperty("User-Agent","NetFox"); 21< j\
M
5lm<%
d"6&AJ5a
int responseCode=httpConnection.getResponseCode(); c2e
tc8
if(responseCode>=400) ?zQA
{ K9OYri^TQ
processErrorCode(responseCode); xv&Q+HD
return -2; //-2 represent access is error qeL5D*
} V\^EfQ
.R9IL-3fO
[BT/~6ovrZ
String sHeader; Qt/8r*Oe
Z| V`B `
EpFQ|.mQ
for(int i=1;;i++) z&{5;A}Q@
{ p\JfFfC
//DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); /k<WNZM
//Utility.log(in.readLine()); C\di 7 z:
sHeader=httpConnection.getHeaderFieldKey(i); !kE-_dY6)
if(sHeader!=null) ;ByOth|9P
{ e(I=^#u6
if(sHeader.equals("Content-Length")) hrhb!0
{ Xt#4/>dlR
nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); DXa-rk8
break; ~R&;v3
} #_(jS+lP?k
} t| 'N+-T3
else `$B3X
break; {WPobP"
} Qbyv{/
} R8T]2?Q1
catch(IOException e){e.printStackTrace ();} '*k'i;2/1
catch(Exception e){e.printStackTrace ();} !X<~-G2)l
mGGsB5#w>
T9u <p=p
Utility.log(nFileLength); Hv\-_>}K
7?kIVP1r
;Hj~n+
return nFileLength; o4zM)\;F
} H)>;/#!r-
)JNSZB
Ldl5zc
//保存下载信息(文件指针位置) .?!N^_ Ez3
private void write_nPos() V`7FKL@"
{ ^pe{b9c
try{ R#DwF,
output = new DataOutputStream(new FileOutputStream(tmpFile)); 5GPo*Qpl
output.writeInt(nStartPos.length); 8G5m{XTS(
for(int i=0;i<nStartPos.length;i++) hDp6YV,q
{ ^4`Px/&
// output.writeLong(nPos); =@8H"&y`
output.writeLong(fileSplitterFetch.nStartPos); * C6a?]
output.writeLong(fileSplitterFetch.nEndPos); i![dPM
} sSQs#+&=[
output.close(); r,Nq7Txn?
} A%{W{UP8N
catch(IOException e){e.printStackTrace ();} LJ(1RK GCz
catch(Exception e){e.printStackTrace ();} n Ml%'[u
} mK [0L
-atGlu2
_Jt 2YZdA
//读取保存的下载信息(文件指针位置) i6 (a@KRY
private void read_nPos() ZU9c 5/J
{ A6pjRxg
try{ y:vxE8$Q
DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); DANw1_X\
int nCount = input.readInt(); P b]3&!a
nStartPos = new long[nCount]; 4)<~4 '
nEndPos = new long[nCount]; (Gw,2-A
for(int i=0;i<nStartPos.length;i++) }Iz7l{al
{ x"CZ]p&m
nStartPos = input.readLong(); o)[2@fRC(
nEndPos = input.readLong(); \C`~S7jC
} ?&^?-S% p
input.close(); a
/:@"&Y
} bgK<pi)d
catch(IOException e){e.printStackTrace ();} pOrWg@<\L
catch(Exception e){e.printStackTrace ();} Xe^Cn
R
} z8J."27ND
OHflIeq#@
$Tb G+Eb8
private void processErrorCode(int nErrorCode) )5.C]4jol
{ L:k9#6
System.err.println("Error Code : " + nErrorCode); ph#tgLJ
} @j4U^"_QB
Eb=#9f%y>&
jh.@-
//停止文件下载 kee|42E
public void siteStop() k~|-gfFP
{ D Kw*~0
bStop = true; (} 5S
for(int i=0;i<nStartPos.length;i++) h#hxOVl%x
fileSplitterFetch.splitterStop(); 2*w:tT8+X
]l(wg]
q9^
} &k1T08C*
} R3!@?mcr
//负责部分文件的抓取 Cua%1]"4w
**FileSplitterFetch.java 1 `7<2w
*/ E3*\
^Q_
package NetFox; ,~);EC=`
ad_`x
2]c{P\
import java.io.*; ee/&/Gt
import java.net.*; c. A|Ir
hG_?8:W8HT
snt(IJQ
public class FileSplitterFetch extends Thread { 7 uarh!
NcAp_q?
4
k3t78Qg
String sURL; //File URL D>!6,m2
long nStartPos; //File Snippet Start Position n3`&zY
long nEndPos; //File Snippet End Position SgEBh
int nThreadID; //Thread's ID tL+OCLF;
boolean bDownOver = false; //Downing is over `+/H^
boolean bStop = false; //Stop identical wO>L#"X^v
FileAccessI fileAccessI = null; //File Access interface !P$'#5mr
(?*BB3b`
p<v.Q
public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException 3 s>'hn
{ "z*:'8;E
this.sURL = sURL; ?~QIALA
this.nStartPos = nStart;
4\&
this.nEndPos = nEnd; x5Z-{"
nThreadID = id; EOoZoVdzx
fileAccessI = new FileAccessI(sName,nStartPos);//定位 O`$#Pg
} 34QfgMyH
}elH75[64
tyDY'W\]
public void run() yt+}K)Hz
{ 7DfTfTU6
while(nStartPos < nEndPos && !bStop) "W#t;;9Wz
{ pfd#N[c
) ){xlFA}
sIl33kmv
try{ |Cdvfk
URL url = new URL(sURL); Kwhdu<6
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); XIWm>IQ[)
httpConnection.setRequestProperty("User-Agent","NetFox"); o."rxd
String sProperty = "bytes="+nStartPos+"-"; Sc]P<F7N]
httpConnection.setRequestProperty("RANGE",sProperty); a0*2) uL}
Utility.log(sProperty); 8:.nEo'
Q#Y k?Kv~
WM)F0@"
InputStream input = httpConnection.getInputStream(); 4{qB X?
//logResponseHead(httpConnection); i\H+X
(Bo bB]~a
;p ]y)3
byte[] b = new byte[1024]; =_[Z W
int nRead; vSW
L$Y2
while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) [ "xn5lE
{ X[W]=yJJ
nStartPos += fileAccessI.write(b,0,nRead); ]=!P(z|
//if(nThreadID == 1) I@l>w._.
// Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); D0;tcm.$
} !?[oIQ)h
'ho{eR@d
g8'DoHJ*
Utility.log("Thread " + nThreadID + " is over!"); @S 6u9v
bDownOver = true; D^Ys)- d
//nPos = fileAccessI.write (b,0,nRead); 0
3~Ikll
} r
Db>&s3
catch(Exception e){e.printStackTrace ();} o/,NG U
} t?^9HP1b_
} M_``'gw
{ ?{U,&
2BzqY`O
//打印回应的头信息 $cVi;2$p
public void logResponseHead(HttpURLConnection con) @1R8-aa-r
{ w.N,)]h
for(int i=1;;i++)
0v^:
{ T[Pa/j{
String header=con.getHeaderFieldKey(i); s{/qS3=
if(header!=null) \Z/k;=Sla
//responseHeaders.put(header,httpConnection.getHeaderField(header)); ZB5?!.ND
Utility.log(header+" : "+con.getHeaderField(header)); =ex'22
else 5A&y]5-Q`
break; V8O.3fo`[`
} &!35/:~uD
} Ih1|LR/c
*T4<&
NfE.N&vI_c
public void splitterStop() '9J|=z9.
{ Napf"Av
bStop = true; 2@vj!U 8
} W>spz~w%j
eFTX6XB:i
&14W vAU
} v&3O&y/1v
}iIbcA
`eRLc}aP2
/* J<JBdk
**FileAccess.java )'q%2%Ak
*//文件访问(定位,写) /'y5SlE[J
package NetFox; v@G4G*x\
import java.io.*; |
W#~F&{]
OYf{?-QD
,2 WH/"
public class FileAccessI implements Serializable{ m%QqmTH
|ia@,*KD
//RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 ykq'g|
RandomAccessFile oSavedFile; GoE#Mxh xo
long nPos; Su8'$CFz$.
f|xLKcOP
=hw^P%Zn
public FileAccessI() throws IOException 9u wL{P&
{ ]
mj
v;C
this("",0); )u@t.)ChAV
} b"8FlZ$
Kla:e[{
um8AdiK
public FileAccessI(String sName,long nPos) throws IOException R9.HD?H@
{
U
5`y
oSavedFile = new RandomAccessFile(sName,"rw"); @~jxG%y86
this.nPos = nPos; ~uPk
oSavedFile.seek(nPos); > zL|8f
} ~Sy-gaJ
I{dl% z73
i=QqB0
public synchronized int write(byte[] b,int nStart,int nLen) +Z?[M1g
{ q|q::q*
int n = -1; [Hcaw
try{ eX<K5K.B
oSavedFile.write(b,nStart,nLen); $
u2Cd4
n = nLen; _1JmjIH)M
} Wp*sPZ
catch(IOException e) )
YSh D
{ 5_G'68;OV
e.printStackTrace (); L? ;/cO^
} ,0T)Oc|HL/
-
8syjKTg
xQz#i-v
return n; ^now}u9S6
} NyJnOw(
@;9()ad
xbC~C~#
} *1;23BiH-
!cCg/
^`&HWp
/* |t\KsW
**SiteInfoBean.java ci7~KewJ*
*/ U5rxt^
package NetFox; 0]a1 5
u~71l)LA
'P/taEi=R
public class SiteInfoBean { [&n|\!
;4d.)-<No_
*IlQ5+3I
private String sSiteURL; //Site's URL e<'U8|}hc{
private String sFilePath; //Saved File's Path *?Wtj
private String sFileName; //Saved File's Name }'jV/
private int nSplitter; //Count of Splited Downloading File Kcn\g.
EW5]!%
SY6r 8RK
public SiteInfoBean() J%4HNW*p
{//nSplitter的缺省值为5 70<K.T<b
//default value of nSplitter is 5 /s-d?
this("","","",5); /:6Q.onmLn
} zZYHc?Z
-ddOh<U>
s1@@o#r
public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) ew"m!F#
{ B_@7IbB
sSiteURL= sURL; 6ZHv,e`?
sFilePath = sPath; )b (X
sFileName = sName; kt<@H11
this.nSplitter = nSpiltter; #! @m y
<W|1<=z(
,$i<@2/=m
} Qrz*Lvle h
X0x_+b?
_
I:/4t^%
public String getSSiteURL() |
W?[,|e
{ i -V0Lm/
return sSiteURL; -t b;igv
} tD^a5qPh
^HoJ.oC/
5|m9:Hv[#
public void setSSiteURL(String value) J]]\&MtaO
{ ,A?v,Fs>O[
sSiteURL = value; >;.*
} <