/* 5)5bt q)[
**SiteFileFetch.java l_-n&(N2<[
*/ N>Y50
package NetFox; Z;'.pU~
import java.io.*; .l5 "X>
import java.net.*; y]_8.
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public class SiteFileFetch extends Thread { J_E(^+
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SiteInfoBean siteInfoBean = null; //文件信息Bean
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long[] nStartPos; //开始位置 ^p zxwt
long[] nEndPos; //结束位置 0P40K
FileSplitterFetch[] fileSplitterFetch; //子线程对象 TK/'=8
long nFileLength; //文件长度 W.D3$
boolean bFirst = true; //是否第一次取文件 `A _8nW)
boolean bStop = false; //停止标志 {
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File tmpFile; //文件下载的临时信息 `$SEkYdt
DataOutputStream output; //输出到文件的输出流 arQ%
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//负责整个文件的抓取,控制内部线程(FileSplitterFetch类) tZCe?n]
public SiteFileFetch(SiteInfoBean bean) throws IOException *F*jA$aY
{ sVdK^|j
siteInfoBean = bean; ('6g)@=\U
//tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); &qP-x98E?
tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); q;zf|'&*7C
if(tmpFile.exists ()) tq:tY}:4
{ %=4ak]As
bFirst = false; 9r+O!kF(
read_nPos(); q+n1~AT
} UdW(\%
else k)K-mD``U
{ c_bVF 'Bz
nStartPos = new long[bean.getNSplitter()]; `s>=Sn&UP
nEndPos = new long[bean.getNSplitter()]; ZHF(q6T
} xhkWKB/7
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} B4:l*P'
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public void run() Wmjz KCl
{ m?VRX.>
//获得文件长度 YATdGLTeq
//分割文件 9N
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//实例FileSplitterFetch
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//启动FileSplitterFetch线程 )Ct*G=
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//等待子线程返回 GP[r^Z
try{ (5q%0|RzRs
if(bFirst) RYZE*lWUh
{ soq".+Q
nFileLength = getFileSize(); %L13Jsw
if(nFileLength == -1) l \^nC2
{ +Sd,l>8\
System.err.println("File Length is not known!"); G(0y|Eq
} "c/s/$k//
else if(nFileLength == -2) Ryq"\Q>+
{ 4SffP/
System.err.println("File is not access!"); loUl$X.u
} fEw=I7{Y
else y /:T(tk$
{ $C05iD
for(int i=0;i<nStartPos.length;i++) d$_q=ywc
{ ?5yH'9zE
nStartPos = (long)(i*(nFileLength/nStartPos.length)); uB<F.!3
} {y:#'n
for(int i=0;i<nEndPos.length-1;i++) p=~h|(M|
{ H
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nEndPos = nStartPos[i+1]; xeHb89GnoQ
} q#(/*AoU
nEndPos[nEndPos.length-1] = nFileLength; (HaKF7Jsi
} ft/^4QcyAM
} <P^hYj-swh
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//启动子线程 \5[D7}
fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; D=~B7b:
for(int i=0;i<nStartPos.length;i++) %7]XW 2u
{ .b#9q6F-/
fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), mUt,Z^ l`
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), [t.%baF
nStartPos,nEndPos,i); )t,{YGY#
Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); O5^J!(.O\Z
fileSplitterFetch.start(); T")i+v
} pYfV~Q^3
// fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), IypWVr
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); Vj=Xcn#*8
// Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", fi&uB9hc
nEndPos = " + nFileLength); c3V]'~
// fileSplitterFetch[nPos.length-1].start(); 2>$F0
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//等待子线程结束 bR'mV-2'
//int count = 0; w*:GM8=6
//是否结束while循环 8jjFC9Cbn0
boolean breakWhile = false; |0L=8~M(j
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while(!bStop) x[vBK8
{ ~ThVap[*
write_nPos(); Zlk,])9 Q
Utility.sleep(500); zkh hN"bX
breakWhile = true; v_z..-7Dq+
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for(int i=0;i<nStartPos.length;i++) 3^\?>C7
{ hD_5~d
if(!fileSplitterFetch.bDownOver) pgLtD};S
{ Har~MO?A
breakWhile = false; T A\4uy6o
break; ou'~{-_xd
} ^qeY9O
} (T|TEt
if(breakWhile) j2}
break; j ,C,5l=
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//count++; :xFu_%7
//if(count>4) hIuMHq7h
// siteStop(); oTCzY Y
}
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System.err.println("文件下载结束!"); V#0
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} p^1zIC>F
catch(Exception e){e.printStackTrace ();} PS=e\(6QC
} JiFA]M`^Q
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//获得文件长度 :zdEq")v
public long getFileSize() Vd+td;9(
{ u5w&X8x
int nFileLength = -1; XXW]0{k:y
try{ wG1y,u'
URL url = new URL(siteInfoBean.getSSiteURL()); =&A!C"qK4[
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); :)#hrFp
httpConnection.setRequestProperty("User-Agent","NetFox"); bauA}3
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int responseCode=httpConnection.getResponseCode(); EntF@ln!
if(responseCode>=400) Y?yo\(Cdx
{ D~#Ei?aH
processErrorCode(responseCode); E *F*nd]K
return -2; //-2 represent access is error 9>by~4An?
} &{%MjKJ._
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String sHeader; q!6|lZ B3
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for(int i=1;;i++) :{LAVMG&^
{ 2fl4h<V
//DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); &E
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//Utility.log(in.readLine()); ;%' b;+
sHeader=httpConnection.getHeaderFieldKey(i); AZwl fdLB
if(sHeader!=null) @}<"N
{ XZS5B~E
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if(sHeader.equals("Content-Length")) 8|O=/m ^]
{ QR<`pmB~y
nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); } h[>U
break; d%0+i/p
} <i{K7}':
} .xO
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else !;%y$$gxh
break; /XcDYMKgh
} wGvhB%8K
} zJ9v%.e
catch(IOException e){e.printStackTrace ();} bpCNho$
catch(Exception e){e.printStackTrace ();} 6*IpAIh
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Utility.log(nFileLength); OL3UgepF
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return nFileLength; nH@(Y&S
} 8L%M<JRg~
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//保存下载信息(文件指针位置) [C1 LT2a
private void write_nPos() bAf,aV/C&|
{ g\U/&.}DN
try{ wtXY:O
output = new DataOutputStream(new FileOutputStream(tmpFile)); %Rp8{.t7
output.writeInt(nStartPos.length); AoYaVlKG8
for(int i=0;i<nStartPos.length;i++) XS?gn.o\
{ .WvlaPK
// output.writeLong(nPos); -ynBi;nH
output.writeLong(fileSplitterFetch.nStartPos); n@!wp/J,
output.writeLong(fileSplitterFetch.nEndPos); >3 l=*|9
} $r\"6e
output.close(); rK1-Mu
} uWjN2#&,
catch(IOException e){e.printStackTrace ();} fW?sYC'
catch(Exception e){e.printStackTrace ();} ["y6b*;x
} ju|]Qlek
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//读取保存的下载信息(文件指针位置) DP9LO_{
private void read_nPos() vE%s,E,
{ 2*[QZ9U[@
try{ ACg;CTBb
DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); AF}gSNX
int nCount = input.readInt(); zI^]esX!2_
nStartPos = new long[nCount]; +dk fcG
nEndPos = new long[nCount]; xzsdG?P
for(int i=0;i<nStartPos.length;i++) {tw+#}T a
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nStartPos = input.readLong(); %{!R
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nEndPos = input.readLong(); ZF6c{~D
} LY 0]l$
input.close(); &<3&'*ueW
} irbw'^;y
catch(IOException e){e.printStackTrace ();} 1vnYogL
catch(Exception e){e.printStackTrace ();} .@#A|fgv
} aJhxc<"e
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private void processErrorCode(int nErrorCode) e(?]SU|
{ m&*JMA;^
System.err.println("Error Code : " + nErrorCode); I9?Ec6a_
} \]uV!)V5B
}!p`1]gem
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//停止文件下载 ;=4Xz\2
public void siteStop() *bd[S0l
{ !4(zp;WY^
bStop = true; o]ePP,
for(int i=0;i<nStartPos.length;i++) ]fBUT6
fileSplitterFetch.splitterStop(); :YP #
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} L\%orLEmK
} 0hY{<^"Y
//负责部分文件的抓取 W$0^(FH[
**FileSplitterFetch.java ~q+hV+fa>
*/ +s++7<C
package NetFox; S >yLqPp
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import java.io.*; 0[Ht_qxb
import java.net.*; *.#oxcll
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public class FileSplitterFetch extends Thread { s{0aBeq
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String sURL; //File URL ?e[lr>-
long nStartPos; //File Snippet Start Position 1)m@?CaI`
long nEndPos; //File Snippet End Position 8[vc?+>&
int nThreadID; //Thread's ID "]K>j'^Zs<
boolean bDownOver = false; //Downing is over 1y#D?R=E
boolean bStop = false; //Stop identical ",6M)3{|c
FileAccessI fileAccessI = null; //File Access interface +M'
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public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException fGhn+8VfX
{ ApBWuXp|u
this.sURL = sURL; a=cvCf
this.nStartPos = nStart; >zAUW[]C:I
this.nEndPos = nEnd; Wbr+KX8)
nThreadID = id; 7frTTSZ
fileAccessI = new FileAccessI(sName,nStartPos);//定位 HK`I\,K
} 7d LuX
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public void run() .X# `k
{ y@0E[/O
while(nStartPos < nEndPos && !bStop) cufH?Xg<
{ okbQ<{9
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try{ S$QG.K:<!
URL url = new URL(sURL); lOtDqb&
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); UQ{L{H
httpConnection.setRequestProperty("User-Agent","NetFox"); /p8dZ+X
String sProperty = "bytes="+nStartPos+"-"; x)( |[
httpConnection.setRequestProperty("RANGE",sProperty); 15o9 .
Utility.log(sProperty); feQ **wI
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InputStream input = httpConnection.getInputStream(); |yx6X{$k
//logResponseHead(httpConnection); 8F._9U-EN
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byte[] b = new byte[1024]; #B4%|v;`E?
int nRead; +HBd
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while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) 8F'x=lIO
{ s&RVJX>Rt
nStartPos += fileAccessI.write(b,0,nRead); 6Vz9?puD
//if(nThreadID == 1) HDF|{
// Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); O#F4WWF
} @3zg=?3
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Utility.log("Thread " + nThreadID + " is over!"); gHo?[pS%y
bDownOver = true; c@8 93<_
//nPos = fileAccessI.write (b,0,nRead); MdvcnaCG
} 9jw\s P@
catch(Exception e){e.printStackTrace ();} V,cBk
} p,eTY[k?
} Ft&]7dT{W
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//打印回应的头信息 ;C2K~8,
public void logResponseHead(HttpURLConnection con) #w' kV#
{ [Al&
for(int i=1;;i++)
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{ T\D}kQM
String header=con.getHeaderFieldKey(i); iv4H#rJ
if(header!=null) `hQ5VJo
//responseHeaders.put(header,httpConnection.getHeaderField(header)); Fvbh\m
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Utility.log(header+" : "+con.getHeaderField(header)); 4rLL[??
else !6*"(
break; S[J}UpV
} _no*k?o*
} ?vbvBu{a
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public void splitterStop() R}!:'^
{ vkri+:S3
bStop = true; $w`=z<2yo1
} L6|oyf
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} 2QyV%wz
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/* 9,:l8
**FileAccess.java <+?7H\b
*//文件访问(定位,写) W*),y:
package NetFox; JehrDC2N
import java.io.*; 1cpiHZa
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public class FileAccessI implements Serializable{ {#?N
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//RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 ix)M`F%P3
RandomAccessFile oSavedFile; 42$VhdG
long nPos; \o*5
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public FileAccessI() throws IOException P-y jN
{ eg;~zv
this("",0); vqDu(6!2
} N"Zt47(
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public FileAccessI(String sName,long nPos) throws IOException ^
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{ W$hx,VEy`
oSavedFile = new RandomAccessFile(sName,"rw"); Jh,]r?Bd
this.nPos = nPos; Z>:NPZODf
oSavedFile.seek(nPos); I9_RlAd
} ~=M7 3U#
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public synchronized int write(byte[] b,int nStart,int nLen) 6-N?mSQU
{ !Xf5e*1IS
int n = -1; 4&<oFW\r
try{ ;=)k<6
oSavedFile.write(b,nStart,nLen); naG=Pq<
n = nLen; 2=,lcWr
} *+Ek0M
catch(IOException e) p& y<I6a,
{ j4gF;-m<
e.printStackTrace (); JVvs-bK5
} 3%#3iZ=_
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return n; k:t]s_`<
} SYAyk
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} (y=C_wvqZ
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/* :;t:H]
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**SiteInfoBean.java hgYZOwQ
*/ `uv2H$
package NetFox; U6glp@s
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public class SiteInfoBean { v|XTr,#
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private String sSiteURL; //Site's URL 8g@<d^8@
private String sFilePath; //Saved File's Path |s7s6k)mm
private String sFileName; //Saved File's Name \pa"%c)
private int nSplitter; //Count of Splited Downloading File ?ZV/U!y
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public SiteInfoBean() dN$0OS`s[
{//nSplitter的缺省值为5 J{.{f
//default value of nSplitter is 5 >!eAM )
this("","","",5); $SlIr<'*"
} Z^bQ^zk-
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public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) qzYwt]GNS
{ ]FJjgu<