/* E2r5Pg
**SiteFileFetch.java CWkWW/ZI
*/ QD,m`7(
package NetFox; k_]'?f7Z
import java.io.*; S. `y%t.GP
import java.net.*; !6=s{V&r1
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public class SiteFileFetch extends Thread { "qq$i35x
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SiteInfoBean siteInfoBean = null; //文件信息Bean `3\U9ZH23
long[] nStartPos; //开始位置 I%r7L
long[] nEndPos; //结束位置 Y9X,2L7V
FileSplitterFetch[] fileSplitterFetch; //子线程对象 E>QS^)ih
long nFileLength; //文件长度 S|tA%2z
boolean bFirst = true; //是否第一次取文件 Db Qp(W0
boolean bStop = false; //停止标志 2x<BU3
File tmpFile; //文件下载的临时信息 f?.VVlD
DataOutputStream output; //输出到文件的输出流 KX~
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//负责整个文件的抓取,控制内部线程(FileSplitterFetch类) L;opQ~g
public SiteFileFetch(SiteInfoBean bean) throws IOException ks.p)F>]
{ _m?i$5
siteInfoBean = bean; HE+' fQ!R
//tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); U>*@VOgB
tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); I*TTD]e'X
if(tmpFile.exists ()) \m|5Aqs
{ dYISjk@
bFirst = false; it H
read_nPos(); (Z>?\iNJ
} mh"PA p
else o=Z:0Ukl]
{ *Hn=)q
nStartPos = new long[bean.getNSplitter()]; 3y.+03
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nEndPos = new long[bean.getNSplitter()]; @xdtl{5G
} =Ya^PAj '}
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} ]zj#X\
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public void run() eg*a Vb
{ )8^E{w^D}
//获得文件长度 T^^7@\vDI
//分割文件 (enr{1
//实例FileSplitterFetch
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//启动FileSplitterFetch线程 Z#u{th
//等待子线程返回 4Mg%}/cC
try{ $)*qoV
if(bFirst) spP[S"gI
{ | t:UpP
nFileLength = getFileSize();
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if(nFileLength == -1) 3_wR2AU~
{ EFDmNud`Q
System.err.println("File Length is not known!"); [@qjy*5p
} @:w^j0+h
else if(nFileLength == -2) -`5]%.E&8
{ xT&/xZLT
System.err.println("File is not access!"); [gUD +
} rOLZiE T
else vW.f`J,\D'
{ 40=u/\/K
for(int i=0;i<nStartPos.length;i++) 4PD5i
{ 3.dSS
nStartPos = (long)(i*(nFileLength/nStartPos.length)); w|G7h=
} fPTLPcPP
for(int i=0;i<nEndPos.length-1;i++) ih)\P0wed
{ >{Ayzz>v
nEndPos = nStartPos[i+1]; 1^]IuPxq
} N}/V2K]Q
nEndPos[nEndPos.length-1] = nFileLength; pWE(?d_M{G
} uG'S&8i_
} h(@.bt#
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//启动子线程 i;~.kgtq4
fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; :-59~8&
for(int i=0;i<nStartPos.length;i++) W"s/8;
{ nT:<_'!
fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), p&\QkI=
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), pFMJG<W9,
nStartPos,nEndPos,i); OD[=fR|cp
Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); U&(gNuR>J
fileSplitterFetch.start(); :s+?"'DP
} k {{eyC
// fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), ._p2"<
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1);
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// Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", < (9
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nEndPos = " + nFileLength); %ho?KU2j
// fileSplitterFetch[nPos.length-1].start(); LR.]&(kyd
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//等待子线程结束 *eXs7 "H
//int count = 0; OSuQ7V
//是否结束while循环 !ck luj
boolean breakWhile = false; IX
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while(!bStop) _~1O #*|4
{ eCJtNPd
write_nPos(); EpACd8Fb
Utility.sleep(500); $[HCetaqV
breakWhile = true; w$s6NBF7
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for(int i=0;i<nStartPos.length;i++) WllQM,h
{ Ot=nKdP}D
if(!fileSplitterFetch.bDownOver) 9:%')M&Q
{ i\
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breakWhile = false; 1)}hzA
break; u-.5rH l
} #Q_Scxf
} !j #8zN
if(breakWhile) Qg1kF^=
break; Iw] ylp
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//count++; =j w?*
//if(count>4) zvnd@y{[
// siteStop(); +`S_Gy
} evE:FiDm(j
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System.err.println("文件下载结束!");
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} +Y+fM
catch(Exception e){e.printStackTrace ();} 0%rE*h9+
} wmbG$T%k
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//获得文件长度 DcRoW
public long getFileSize() }`0=\cKqn
{ 6L~5qbQ
int nFileLength = -1; S{XO3
try{ \qW^AD(it<
URL url = new URL(siteInfoBean.getSSiteURL()); T|$tQgY^
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); l9%ckC*q
httpConnection.setRequestProperty("User-Agent","NetFox"); ZZ}HgPZ
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int responseCode=httpConnection.getResponseCode(); dZkKAK:v
if(responseCode>=400) +sZY0(|K8
{ FD~uUZTM
processErrorCode(responseCode); #Wl9[W/4
return -2; //-2 represent access is error 'g<FL`iP
} AKLFUk
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`}
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String sHeader; FFVh~em{
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for(int i=1;;i++) =`MQKh,
{ |gk"~D
//DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); LDo~
//Utility.log(in.readLine()); ?*q-u9s9
sHeader=httpConnection.getHeaderFieldKey(i); rV%;d[LB
if(sHeader!=null) MnY}U",
{ './qBJ
if(sHeader.equals("Content-Length")) $Vs5d=B
{ 8v^AVg
nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); ? R[GSS1
break; >A L^y(G
} j=Q ?d]
} h=au`o&CG
else SrdCLT8
break; dqt}:^L*0g
} LmR OG-9
} zU|'IW&
catch(IOException e){e.printStackTrace ();} 5NKyF
catch(Exception e){e.printStackTrace ();} }&Xf<6
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Utility.log(nFileLength); ,/p.!+
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return nFileLength;
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} WR*<|
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//保存下载信息(文件指针位置) (iO/@iw
private void write_nPos() n5#9o},oK
{ m0Uk*~Gz
try{
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output = new DataOutputStream(new FileOutputStream(tmpFile)); kI*f}3)Y
output.writeInt(nStartPos.length); unN*L
for(int i=0;i<nStartPos.length;i++) kkT=g^D9j
{ FePWr7Ze
// output.writeLong(nPos); RDqQ6(e"
output.writeLong(fileSplitterFetch.nStartPos); :WSszak
output.writeLong(fileSplitterFetch.nEndPos); OOz;/kay
} 2DBFY1[Pk
output.close(); 5.Nc6$
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} i[e-dT:*R
catch(IOException e){e.printStackTrace ();} 6,p;8I
catch(Exception e){e.printStackTrace ();} /-ewCCzZV
} "?
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//读取保存的下载信息(文件指针位置) >lK:~~1
private void read_nPos() GtqA@&5&
{ q+67Wc=
try{ g.Kyfs4`
DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); !xC IvKW
int nCount = input.readInt(); 9aKCO4
nStartPos = new long[nCount]; _ba.oIc
nEndPos = new long[nCount]; x@VZJrQQ
for(int i=0;i<nStartPos.length;i++) N2EX`@_2
{ Ymcc|u6 $"
nStartPos = input.readLong(); sGbk4g
nEndPos = input.readLong(); _7-P8"m
} H#I%6k*\a
input.close(); }~NWOJ3;
}
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catch(IOException e){e.printStackTrace ();} JZrZDW>M
catch(Exception e){e.printStackTrace ();} B}h8c
} J#k.!]r,Y
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private void processErrorCode(int nErrorCode) q9m-d-!)
{ ]K>x:vMKH
System.err.println("Error Code : " + nErrorCode); 4
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} 4d
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//停止文件下载 S6|L !pO
public void siteStop() Ha!]*wg#
{ BIEeHN4
bStop = true; 8:Jc2K
for(int i=0;i<nStartPos.length;i++) ')v<MqBr
fileSplitterFetch.splitterStop(); 6[C>"s}Ol
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} JiHk`e`
} n@| &jh
//负责部分文件的抓取 D5fhOq+g
**FileSplitterFetch.java i<uk}
*/ I/w=!Ih
package NetFox; pS<j>y
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import java.io.*; y{uN+QS
import java.net.*; VTJ,;p_UH
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public class FileSplitterFetch extends Thread { 92Df.xI}
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String sURL; //File URL gK"E4{y_@
long nStartPos; //File Snippet Start Position JNgl
long nEndPos; //File Snippet End Position S"joXmJ/-C
int nThreadID; //Thread's ID b+ v!3|
boolean bDownOver = false; //Downing is over J*'#!
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boolean bStop = false; //Stop identical "( P-VX
FileAccessI fileAccessI = null; //File Access interface #Q_
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public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException XnI)s^
{ >Sh"/3%q
this.sURL = sURL; 6):^m{RH^
this.nStartPos = nStart; l?LP:;S
this.nEndPos = nEnd; Lr`G. e
nThreadID = id; B[6y2+6$0
fileAccessI = new FileAccessI(sName,nStartPos);//定位 .6nNqGua1
} C
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public void run() +oMe\wYR$r
{ q`DilZ]S
while(nStartPos < nEndPos && !bStop) h$y0>eMWs
{ s+yX82Y
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try{ a6fqtkZ x
URL url = new URL(sURL); /6@Wm?`DB
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); H-aSLc
httpConnection.setRequestProperty("User-Agent","NetFox"); WAt | J2
String sProperty = "bytes="+nStartPos+"-"; }
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httpConnection.setRequestProperty("RANGE",sProperty); Y^W.gGM
Utility.log(sProperty); D%k]D/
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InputStream input = httpConnection.getInputStream(); c'r7sI%Yi
//logResponseHead(httpConnection); qdeS*rp\
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byte[] b = new byte[1024]; m"Y|xvIA
int nRead; BJi
while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop)
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{ 2m/=0sb\{
nStartPos += fileAccessI.write(b,0,nRead); 'v*Y7zZ#K
//if(nThreadID == 1) BVpRkUC"
// Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); L=wg"$
} hhVyz{u
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Utility.log("Thread " + nThreadID + " is over!"); e+5]l>3)f
bDownOver = true; GGR hM1II
//nPos = fileAccessI.write (b,0,nRead); ")87GQ( R
} 'cx&:s
catch(Exception e){e.printStackTrace ();} g5*Zg_G/
} M4 :}`p=
} iB,Nqs3i*
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//打印回应的头信息 <U ?_-0
public void logResponseHead(HttpURLConnection con) Jj$N3UCg7
{ ch%-Cg~%
for(int i=1;;i++) ~~_!&
{ DxLN{g]B
String header=con.getHeaderFieldKey(i); p kR+H|
if(header!=null) ?u9JRXj%
//responseHeaders.put(header,httpConnection.getHeaderField(header)); >=_Z\ wA
Utility.log(header+" : "+con.getHeaderField(header)); P|OjtI
else ,^UNQO*{GI
break; `/mcjKQ&9y
} iYJzSVO
} do:3aP'S,
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public void splitterStop() IW.~I,!x
{ =A,6KY=E
bStop = true; }I\hOL
} \*V`w@
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} T*%Q s&x;
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/* -nQ :RHnd
**FileAccess.java d|9B3I*I
*//文件访问(定位,写) Lit@ m2{\
package NetFox; tDl1UX
import java.io.*; K)AJx"
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public class FileAccessI implements Serializable{ #UcqKq
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//RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 CmNd0S4v
RandomAccessFile oSavedFile; NiwJ$Ah~X
long nPos; #O<2wMb2<
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public FileAccessI() throws IOException Olg@ Ri
{ {/x["2a1
this("",0); APgP*,
} ,rB"ag !
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public FileAccessI(String sName,long nPos) throws IOException k{op ,n#
{ Q]Fm4
oSavedFile = new RandomAccessFile(sName,"rw"); /=zzym~<>
this.nPos = nPos; 4wZ{Z
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oSavedFile.seek(nPos); CV~\xYY
} `i8KIE
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public synchronized int write(byte[] b,int nStart,int nLen) \#.@*?fk
{ 9}{i8
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