/* i?/qY&~
**SiteFileFetch.java LscGTs,
*/ O2+ 6st
package NetFox; i1085ztN
import java.io.*; .VqhV
import java.net.*; 3
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public class SiteFileFetch extends Thread { 1cDF!X]
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SiteInfoBean siteInfoBean = null; //文件信息Bean }b}m3i1
long[] nStartPos; //开始位置 LP-o8c
long[] nEndPos; //结束位置 ta0|^KAA
FileSplitterFetch[] fileSplitterFetch; //子线程对象 IgzQr >
long nFileLength; //文件长度 YR70BOxK
boolean bFirst = true; //是否第一次取文件 NHt\
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boolean bStop = false; //停止标志 [;N'=]`
File tmpFile; //文件下载的临时信息 SJLis"8
DataOutputStream output; //输出到文件的输出流 l}h!B_P'
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//负责整个文件的抓取,控制内部线程(FileSplitterFetch类) K:M8h{Ua
public SiteFileFetch(SiteInfoBean bean) throws IOException +t.b` U`-
{ AX INThJ
siteInfoBean = bean; cNrg#Asen&
//tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); _aphkeqd
tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); ~Ei<Z`3}7"
if(tmpFile.exists ()) 5G#n"}T
{ RCrCs
bFirst = false; iscz}E,Y
read_nPos(); TC('H[
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} Sdo-nt
else R_KH"`q
{ Wqnc{oq|$
nStartPos = new long[bean.getNSplitter()]; B~mj 8l4
nEndPos = new long[bean.getNSplitter()]; wzA$'+Mb
} aXVFc5C\
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} 4*L_)z&4;
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public void run() H}!r|nG
{ #WuBL_nZ~
//获得文件长度 !if
//分割文件 0sqFF[i
//实例FileSplitterFetch }C:r9?T
//启动FileSplitterFetch线程 ;gkM{={`p
//等待子线程返回 [
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try{ 7v kL1IA
if(bFirst) bOB\--:]
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nFileLength = getFileSize(); 0f/<7R
if(nFileLength == -1) .H|-_~Yx|
{ uZ5p#M_
System.err.println("File Length is not known!"); m*pJBZxd
} 2T35{Q!=F
else if(nFileLength == -2) b-DvW4B
{ 8mMQ[#0:}
System.err.println("File is not access!"); hrn+UL:d
} H)?z
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else R5D1w+
{ 'V {W-W<
for(int i=0;i<nStartPos.length;i++) .]u/O`c]
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nStartPos = (long)(i*(nFileLength/nStartPos.length)); *g%yRU{N
} tc! #wd+u
for(int i=0;i<nEndPos.length-1;i++) s#11FfF`
{ l;Wj]
nEndPos = nStartPos[i+1]; X,
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} JI}'dU>*U:
nEndPos[nEndPos.length-1] = nFileLength; 6N4~~O
} L_T5nD^D
} $I=~S[p
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//启动子线程 cr3^6HB
fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; <YY 14p
for(int i=0;i<nStartPos.length;i++) u_enqC3
{ SU0
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fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), 2ESo2
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), (HVGlw'`
nStartPos,nEndPos,i); EwN}l
Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); ueudRb
fileSplitterFetch.start(); ;TYBx24vD'
} b=vkiO`2
// fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), z_HdISy0
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); \D4:Nt#
// Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", Hka2
nEndPos = " + nFileLength); )8AXm
// fileSplitterFetch[nPos.length-1].start(); I,tud!p`
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//等待子线程结束 s<Ziegmw|g
//int count = 0; vaLSH
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//是否结束while循环 3BI1fXT4=j
boolean breakWhile = false; G\i9:7 `
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while(!bStop) TOt dUO
{ V0@=^Bls
write_nPos(); L0,'mS
Utility.sleep(500); l#o
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breakWhile = true; 1Mzmg[L8
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for(int i=0;i<nStartPos.length;i++) 1zv'.uu.,
{ 4RO}<$Nx}
if(!fileSplitterFetch.bDownOver) ]^E?;1$f?
{ ye&;(30Oq
breakWhile = false; lxx2H1([
break; 0J9x9j`&j
} V
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} 1}x%%RD_
if(breakWhile) N8jIMb'<
break; (QEG4&9
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//count++; SUiOJ[5,
//if(count>4) ^8WRqQdx
// siteStop(); 04ui`-c(
} 9[4xFE?|
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System.err.println("文件下载结束!"); r!v\"6:OM
} 5m@V#2^P
catch(Exception e){e.printStackTrace ();} #qki
} ch]IzdD
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//获得文件长度 *dQSw)R
public long getFileSize() Gc?a +T
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int nFileLength = -1; MgZ/(X E
try{ 1MFbQs^
URL url = new URL(siteInfoBean.getSSiteURL()); &ZO0r ^
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); 6ujWNf
httpConnection.setRequestProperty("User-Agent","NetFox"); vM={V$D&
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int responseCode=httpConnection.getResponseCode(); )%TmAaj9d
if(responseCode>=400) z{q`G wW
{ zLQx%Yg!
processErrorCode(responseCode); *. t^MP
return -2; //-2 represent access is error ~%oR[B7=|
} WJi]t9 3
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String sHeader; q.vIc
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for(int i=1;;i++) `[A];]
{ 6]N.%Y[(
//DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); 42{~Lhxt
//Utility.log(in.readLine()); btB%[]
sHeader=httpConnection.getHeaderFieldKey(i); hH.G#-JO
if(sHeader!=null) x`s>*^
{ SbZ6t$"
if(sHeader.equals("Content-Length")) y_,bu^+*
{ vO=fP_
nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); pg.%Pdr<$
break; UiWg<_<t
} 3|7QUld
} 6!o1XQr=Z
else xw%0>K[
break; kfNWI#'9
} bt *k.=p
} N`i/mP
catch(IOException e){e.printStackTrace ();} }Jw,>}
catch(Exception e){e.printStackTrace ();} rqq1TRg
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Utility.log(nFileLength); ;S{(]K7i
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return nFileLength; $]1=\I
} Tw%
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//保存下载信息(文件指针位置) )0MB9RMk1
private void write_nPos() =41xkAMnk
{ N!3 2 wJ
try{ l6B@qYLZ
output = new DataOutputStream(new FileOutputStream(tmpFile)); d-m7}2c
output.writeInt(nStartPos.length); K,]=6Rj
for(int i=0;i<nStartPos.length;i++) n%-0V>
{ g`^x@rj`E
// output.writeLong(nPos); l%ZhA=TKQ
output.writeLong(fileSplitterFetch.nStartPos); @o^Ww
output.writeLong(fileSplitterFetch.nEndPos); wBzC5T%,
} ToQ"Iy?
output.close(); D$N/FJ8|G
} _ |p8M!
catch(IOException e){e.printStackTrace ();} *I'yH8Fcn
catch(Exception e){e.printStackTrace ();} >p/`;Kq@
} f?b"i A(6
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//读取保存的下载信息(文件指针位置) x"(KBEK~
private void read_nPos()
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{ hSMH,^Io$
try{ ^.G$Q# y,
DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); *A< 5*Db:F
int nCount = input.readInt(); &zs$x?/
nStartPos = new long[nCount]; BHw, 4#F1;
nEndPos = new long[nCount]; eQ"E
for(int i=0;i<nStartPos.length;i++) }%z
{ 1}37Q&2
nStartPos = input.readLong(); "j-CZ\]U|
nEndPos = input.readLong(); q;U,s)Uz^
} :LTN!jj
input.close(); KG@8RtHsQ
} F"<vaqT2
catch(IOException e){e.printStackTrace ();} Ah<+y\C
catch(Exception e){e.printStackTrace ();} -+5>|N#
} s(^mZ
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private void processErrorCode(int nErrorCode) IAEAhqp
{ .l|$dE/E
System.err.println("Error Code : " + nErrorCode); $|@ r!/W
} Mlq.?-QgIL
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//停止文件下载 vj*%Q(E6Pt
public void siteStop() ,PZ ge
{ ?8 {"x8W;
bStop = true; 8D].MI^
for(int i=0;i<nStartPos.length;i++) Mq8L0%j
fileSplitterFetch.splitterStop(); E e]-qN*8
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} ap~^Ty<>
} a:S -
//负责部分文件的抓取 iO[<1?
**FileSplitterFetch.java *j-aXN/ $
*/ +*^H#|!
package NetFox; ZN6Z~SL_i~
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import java.io.*; <,(,jU)j
import java.net.*; @P"p+
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public class FileSplitterFetch extends Thread { 1.X@;
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String sURL; //File URL C-[1iW'
long nStartPos; //File Snippet Start Position 'QIqBU'~
long nEndPos; //File Snippet End Position
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int nThreadID; //Thread's ID ]:f%l
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boolean bDownOver = false; //Downing is over &=Wlaa/,&
boolean bStop = false; //Stop identical m6djeOl
FileAccessI fileAccessI = null; //File Access interface 4aY|TN/|
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public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException E!#WnSpnK
{ ^H'\"9;7
this.sURL = sURL; h}EPnC}
this.nStartPos = nStart; :c[L3rJl
this.nEndPos = nEnd; aATA9V
nThreadID = id; _~
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fileAccessI = new FileAccessI(sName,nStartPos);//定位 e]tDy0@
} +]50D xflA
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public void run() eIo7F m
{ iyp=lLk
while(nStartPos < nEndPos && !bStop) veRm2LSP
{ ,=:D
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try{ t_suF$
URL url = new URL(sURL); e!r-+.i(
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); "}JZU!?
httpConnection.setRequestProperty("User-Agent","NetFox"); l$'wD hN*
String sProperty = "bytes="+nStartPos+"-"; +KEWP\r
httpConnection.setRequestProperty("RANGE",sProperty); .%OR3"9@
Utility.log(sProperty); ->{KVPHe{
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InputStream input = httpConnection.getInputStream(); Z`BK/:vo3H
//logResponseHead(httpConnection); t. '!`5G
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byte[] b = new byte[1024]; Rx|;=-8zg
int nRead; 5P$4 =z91
while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) RAK-UN
{ I)W`sBL
nStartPos += fileAccessI.write(b,0,nRead); 27<
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//if(nThreadID == 1) e NafpK
// Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); (2
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} HX{`VahE
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Utility.log("Thread " + nThreadID + " is over!"); L z1ME(
bDownOver = true; C\/L v.
//nPos = fileAccessI.write (b,0,nRead); UEVG0qF
} -FlzEZ
catch(Exception e){e.printStackTrace ();} CWP2{
} kn"(A.R
} t@Nyr&|D
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//打印回应的头信息 {&T_sw@[
public void logResponseHead(HttpURLConnection con) [=]4-q6UN
{ yEj^=pw
for(int i=1;;i++) >u8gD6X
{ Ezv
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String header=con.getHeaderFieldKey(i); }I6vqG
if(header!=null) QZ%`/\(!8_
//responseHeaders.put(header,httpConnection.getHeaderField(header)); `%Al>u5
Utility.log(header+" : "+con.getHeaderField(header)); e01epVR;
else az|N-?u
break; nmi|\mof
} 0tB0@Wj
} xLZG:^(I
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public void splitterStop() ^_5r<{7/ :
{ gy9U2Wgf|
bStop = true; @<]Ekkg
} 3nnJ8zQ
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} XJ5.
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/* ;K&o-y
**FileAccess.java cXOK)g#
*//文件访问(定位,写) f\>M'{cV
package NetFox; P0PWJ^+,+
import java.io.*; KX7>^Bt&k
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public class FileAccessI implements Serializable{ 58J}{Req
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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 BV upDGh3
RandomAccessFile oSavedFile; \:ak ''
long nPos; 6s/&