/* f6`GU$H
**SiteFileFetch.java :\His{%
*/ %60 OS3
package NetFox; 'OziP
import java.io.*; d`B<\Y#{Us
import java.net.*; 8iJB'#''*
RK|*yt"f"
lYQ|NL():
public class SiteFileFetch extends Thread { qclc--fsE
}>0>OqvF
yivu|q
SiteInfoBean siteInfoBean = null; //文件信息Bean &.*UVc2+Y
long[] nStartPos; //开始位置 4.jRTL5-oj
long[] nEndPos; //结束位置 /]xa}{^B
FileSplitterFetch[] fileSplitterFetch; //子线程对象 )XK\[tL
long nFileLength; //文件长度 $P0q!
boolean bFirst = true; //是否第一次取文件 '!Hs"{~{
boolean bStop = false; //停止标志 6,3o_"J!
File tmpFile; //文件下载的临时信息 gaY&2
DataOutputStream output; //输出到文件的输出流 >dt*^}*
Ms(xQ[#+
//负责整个文件的抓取,控制内部线程(FileSplitterFetch类) gK[;"R)4o@
public SiteFileFetch(SiteInfoBean bean) throws IOException tZ9i/ =S
{ $Xu3s~:S
siteInfoBean = bean; Ytlzn%
//tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); 3$k#bC
tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); e;6KxvX~
if(tmpFile.exists ()) SE]5cJ'>
{
4F~^RR"
bFirst = false; 3Hom0g,V4
read_nPos(); w#9KtW,tt
} =L" 0]4K
else PFh ^Z L
{ /^BC
Qaj
nStartPos = new long[bean.getNSplitter()]; f` uRC-B/
nEndPos = new long[bean.getNSplitter()]; 2(xC|
} -y+>^45
LEgP-sW
+&`W\?.~
!=,4tg`
} "S%t\
EX`P(=zD
EbQLMLD%
public void run() `S@TiD*
{ )O~[4xV~
//获得文件长度 .z`70ot?
//分割文件 s3Vb2C*
//实例FileSplitterFetch XWp8[Cxs
//启动FileSplitterFetch线程 Iv6 q(c
//等待子线程返回 {q?&h'#y
try{ EMW6'
if(bFirst)
KeQcL4<
{ YZBh}l6t
nFileLength = getFileSize(); kW g.-$pp
if(nFileLength == -1) 3`HK^((o
{ @0?!bua_|
System.err.println("File Length is not known!"); >0IZ%Wiz
} C|$qVh>
else if(nFileLength == -2) 6gg8h>b
{ $E\|\g
System.err.println("File is not access!"); d!y*z
} <=q}
Nd\
else ' [
4;QYw
{ G21o@38e
for(int i=0;i<nStartPos.length;i++) yp.K-
{ ^"/^)Lb!@M
nStartPos = (long)(i*(nFileLength/nStartPos.length)); Cl}nPUoL
} Nz,yd%ua
for(int i=0;i<nEndPos.length-1;i++) 9B: 3Ha=
{ DZ8|20b
nEndPos = nStartPos[i+1]; `
R6`"hx$
} \2i7\U
nEndPos[nEndPos.length-1] = nFileLength; #&&T1;z"#
} _>;Wz7
} !Lf<hS^
V)`2Kw
IY`p7 )#i
//启动子线程 =?fz-HB
fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; $<^t][{
for(int i=0;i<nStartPos.length;i++) Dm>"c;2
{ IU%|K~_n
fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), NI >%v
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), 4>hHUz[_
nStartPos,nEndPos,i); W lMcEje
Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); S(Yd.Sp
fileSplitterFetch.start(); E
$@W~).!
} u/zBz*zh
// fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), :S+K\
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); [. 5m}V
// Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", T #\
nEndPos = " + nFileLength); "ZuuSi
// fileSplitterFetch[nPos.length-1].start(); &XP(D5lf`B
Bh>L"'.2
d8j1L/e
//等待子线程结束 P#,u9EIJ
//int count = 0; QHEtG2
//是否结束while循环 kmI0V[Y
boolean breakWhile = false; q+
$6D;9
Sqo+cZ
Jg6Lr~!i
while(!bStop) {4 Of.
{ Hcq.Lq;2:
write_nPos(); 'rD6MY
Utility.sleep(500); La26"C"X
breakWhile = true; P3$eomX'
<B"sp r&1
(q>
TKM
for(int i=0;i<nStartPos.length;i++) /0h
*(nL
{ <j'V}|3
if(!fileSplitterFetch.bDownOver) p\6cpf
{ a V3:{oL
breakWhile = false; vJkc/7
break; N%y i4
} ]b/]^1-(b
} )*,/L <
if(breakWhile) @
D+ftb/
break; 'Wonz<{'
UkV?,P@l
(C2 XFg_
//count++; Nk`UQ~g$
//if(count>4) Hd|l6/[xz
// siteStop(); p5Q]/DhG
} f^WTsh]
--$o$EP`
1^p/#jt
System.err.println("文件下载结束!"); iTVe8eI
} I$n=>s
catch(Exception e){e.printStackTrace ();} d"$8-_K
} "n-'?W!
S;Bk/\2
y}Ky<%A!P
//获得文件长度 n\#YGL<n
public long getFileSize() 29R-Up!SVN
{ WL$^B@gXQ
int nFileLength = -1; INZVe(z
try{ yqK4 "F&
URL url = new URL(siteInfoBean.getSSiteURL()); qfkHGW?1/j
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); |.IH4
K
httpConnection.setRequestProperty("User-Agent","NetFox"); ,b+NhxdZ
R`?l.0
4JSPD#%f
int responseCode=httpConnection.getResponseCode(); mYBEjZB
if(responseCode>=400) /'O8RUjN
{ ^
k^y|\UtZ
processErrorCode(responseCode); 97}]@xN=
return -2; //-2 represent access is error BxY t*b%
} h$>F}n
j
!,J#
r
73WSW/^F
String sHeader; H#-3
I-7LT?r
.b:!qUE^
for(int i=1;;i++) \>L,X_DL
{ 5/48w-fnZ
//DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); q>q:ZV
//Utility.log(in.readLine()); 0bNvmZ$
sHeader=httpConnection.getHeaderFieldKey(i); bm588UQ
if(sHeader!=null) +Qs]8*^?;
{ >%JPgr/
8
if(sHeader.equals("Content-Length")) Otn,UoeeB
{ ?I.9?cQXZ
nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); x^f<G
6z
break; FB=oGgwwq
} R{hX--|j
} bIKg>U'5d
else od;-D~
break; JuRoeq.
} 'Pz%c}hJ
} ]AP1+
&9fN
catch(IOException e){e.printStackTrace ();} GnV0~?
catch(Exception e){e.printStackTrace ();} <?jdNM
93-Y(Xx)bY
~m%[d.
}e
Utility.log(nFileLength); >&L|oq7$
yI w}n67
^}3^|jF
return nFileLength; <QtZ6-;_f
} |J`EM7qMK
TyxIlI4"
:-&|QVH
//保存下载信息(文件指针位置) ?-??>& z
private void write_nPos() .@dC]$2=
{ U%{GLO
try{ wI#8|,]"z
output = new DataOutputStream(new FileOutputStream(tmpFile)); 7AG|'s['=
output.writeInt(nStartPos.length); WlL(NrVA@@
for(int i=0;i<nStartPos.length;i++) l,wlxh$}(
{ tz1@s nes
// output.writeLong(nPos); T.q2tC[bR
output.writeLong(fileSplitterFetch.nStartPos); Re%[t9F&
output.writeLong(fileSplitterFetch.nEndPos); e~h>b.~
} )W@ug,y
output.close(); 6|97;@94
} pMF
vL
catch(IOException e){e.printStackTrace ();} S"Al[{
catch(Exception e){e.printStackTrace ();} vwR_2u
} 5<?Ah+1
337.' |ZE
ROO*/OOd
//读取保存的下载信息(文件指针位置) ?7{U=1gb$
private void read_nPos() 5Z=4%P*I
{ *%-<Ldv
try{ .soCU8i3
DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); }A9#3Y|F
int nCount = input.readInt(); A`c22Ls]
nStartPos = new long[nCount]; ,"qCz[aDN1
nEndPos = new long[nCount]; "EW8ll7r
for(int i=0;i<nStartPos.length;i++) M,Gy.ivz
{ :XKYfc_y
nStartPos = input.readLong(); ~G@NWF?7
nEndPos = input.readLong(); $+gQnI3w
} Ht`fC|E
input.close(); /iW+<@Mas
} ]kh]l8t ^
catch(IOException e){e.printStackTrace ();} Rq4;{a/j
catch(Exception e){e.printStackTrace ();} >Wg=
Tuef
} Y#U.9>h
T+8Yd(:hX
,n|si#
private void processErrorCode(int nErrorCode) <y 4(!z"
{ `RTxc
System.err.println("Error Code : " + nErrorCode); @uSO~.7
} Jcw^Z,
6#w>6g4V~R
G,8mFH
//停止文件下载 QE<Z@/V*a
public void siteStop() OqGp|`
{ (qcFGM22U
bStop = true; $C16}^
for(int i=0;i<nStartPos.length;i++) OT#@\/>
fileSplitterFetch.splitterStop(); +)jUA]hJ/
F)P:lvp<r
QE]@xLz
} l;F"m+B!$
} ZvY"yl?e
//负责部分文件的抓取 ,%i
Scr,z
**FileSplitterFetch.java T2{e1 =Z7
*/ V:0IBbh)w
package NetFox; }_Bo:*9B-o
lH fZw})d
gt4GN`-k
import java.io.*; ]aN9mT
N
import java.net.*; ,@"yr>Q9#6
*i#2>=)
Zy0M\-Mn
public class FileSplitterFetch extends Thread { VPN
9 Ql=
z zG=!JR
;R$G.5h
String sURL; //File URL A#>wbHjWF
long nStartPos; //File Snippet Start Position 5-dt0I@<
long nEndPos; //File Snippet End Position g&RpE41x
int nThreadID; //Thread's ID "2e3 <:$
boolean bDownOver = false; //Downing is over l;$F[/3a
boolean bStop = false; //Stop identical "$BkO[IS
FileAccessI fileAccessI = null; //File Access interface }gSoBu
*oO%+6nL
t Cuvb
public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException r#-
{ \F
_1C=
this.sURL = sURL; bLT3:q#s
this.nStartPos = nStart; N2h5@*1Y
this.nEndPos = nEnd; "|\hTRQ
nThreadID = id; j/V_h'}
fileAccessI = new FileAccessI(sName,nStartPos);//定位 a )O"PA}2
} as07~Xvp-
-]%EX:bm
_JH.&8
public void run() ,>|tQ'
{ 2%/F`_XbP
while(nStartPos < nEndPos && !bStop) O:]']' /
{ 1N/4W6
<Qq
{&,Le
)Rr6@o
try{ v]JET9hY
URL url = new URL(sURL); W3i<Unq
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); 0+&WIs
httpConnection.setRequestProperty("User-Agent","NetFox"); &Vj@){
String sProperty = "bytes="+nStartPos+"-"; _ep&`K
httpConnection.setRequestProperty("RANGE",sProperty); [[T7s(3
Utility.log(sProperty); ,~L*N*ML
=i~
= |K!
ZllmaI
InputStream input = httpConnection.getInputStream(); /cS8@)e4
//logResponseHead(httpConnection); 'm0WPS/6E
<?7CwW
I!zoo[/)%
byte[] b = new byte[1024]; /.:1Da
int nRead; -6MPls+
while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) _ $PeFE2
{ lh-.I]>&`
nStartPos += fileAccessI.write(b,0,nRead); l4gH]!/@
//if(nThreadID == 1) q\tr&@4iC
// Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); /OKp(u;)z
} VnuG^)S
eKP>}`
za>%hZf\
Utility.log("Thread " + nThreadID + " is over!"); hu-]SGb6
bDownOver = true; \ZnA%hC
//nPos = fileAccessI.write (b,0,nRead); 1P]J3o
} HSud$(w
catch(Exception e){e.printStackTrace ();} /{R
^J#
} DzC`yWstP
}
dX\OP>
=K@LEZZ'/<
f}dlQkZ(
//打印回应的头信息 l_yy;e
public void logResponseHead(HttpURLConnection con) F,YPIl
{ &4E|c[HN
for(int i=1;;i++) ['QhC( {
{ $y;w@^
String header=con.getHeaderFieldKey(i); II^Rp],>
if(header!=null) ~U+<JC Z
//responseHeaders.put(header,httpConnection.getHeaderField(header)); eg~
Dm>Es
Utility.log(header+" : "+con.getHeaderField(header)); y0O(n/
else UAjN
break; Wv>`x?W
} hGFi|9/-u
} <\*)YKjn/@
{9J|\Zz3
OL1xxzo
public void splitterStop() $7X;FmlG&
{ *Y1s4FXu2
bStop = true; do`'K3a"
} }51QUFhL0
^uo,LTq+
Q3=X#FQ
} D~inR3(}
~N/%R>(v
Sh;`<Ggi~
/* %X\J%Fj
**FileAccess.java QM!UMqdj
*//文件访问(定位,写) yS)k"XNb
package NetFox; !/`AM<`o
import java.io.*; r
E1ouz!D
l="(Hp%b
T7YJC,^m
public class FileAccessI implements Serializable{ *K>2B99TXu
5I* 1CIO
//RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 .aL%}`8l?
RandomAccessFile oSavedFile; 2w8YtM3+"z
long nPos; j % MY6"
DN8I[5O
4Zjd g`
public FileAccessI() throws IOException {\?f|mmq
{ gy1kb,MO
this("",0); )YCH>Za
} r<]^.]3zj
Y&VypZ"G>
AsS~TLG9p
public FileAccessI(String sName,long nPos) throws IOException daY0;,>
{ 4o''C |ND
oSavedFile = new RandomAccessFile(sName,"rw"); qZQm*q(jM
this.nPos = nPos; B'Nvl#
oSavedFile.seek(nPos); FpttH?^
} 6
y"r'
h*4wi.-
6o#J
public synchronized int write(byte[] b,int nStart,int nLen) ;8F6a:\v
{ <)cmI .J3
int n = -1; ,:.8s>+i
try{ <-d-.
8
oSavedFile.write(b,nStart,nLen); NgGpLdaC2v
n = nLen; r& RJ'z
} `,
|l
catch(IOException e) 823y;
{ |/-# N
e.printStackTrace (); AED
9vDE
} D9(4%^HxV1
uPFbKSJj
48gpXcc@|
return n; z:n
JN%Qb
} R]kH$0`
oW7;t
5W{|?l{
} T~>&m~} +
U:/_T>f%
v@X[0J_8
/* Mc
**SiteInfoBean.java JjAO9j%
*/ }WQ:Rmi
package NetFox; $~EY:
.GnoK?
3,+UsB%
public class SiteInfoBean { RXPl~]k#i
;?o"{mbb
e?aSM
private String sSiteURL; //Site's URL a`||ePb|W~
private String sFilePath; //Saved File's Path (ds*$]
private String sFileName; //Saved File's Name fQU_A
private int nSplitter; //Count of Splited Downloading File a0FU[*q
?!34qh
E;a9RV|
public SiteInfoBean() WsM/-P1Y
{//nSplitter的缺省值为5 bF@iO316H
//default value of nSplitter is 5 t5p#g<