/* W"(u^}
**SiteFileFetch.java 8:g!w:$x
*/ -wr(vE,
package NetFox; FRyPeZR
import java.io.*; -Wo15O"
import java.net.*; ]EL\)xCr
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public class SiteFileFetch extends Thread { 4~u9B/v
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SiteInfoBean siteInfoBean = null; //文件信息Bean ,ECAan/@
long[] nStartPos; //开始位置 .gD km^
long[] nEndPos; //结束位置 cx(2jk}6
FileSplitterFetch[] fileSplitterFetch; //子线程对象 LM,fwAX
long nFileLength; //文件长度 INNAYQ
boolean bFirst = true; //是否第一次取文件 f]_mzF=&
boolean bStop = false; //停止标志 w7Dt1axB
File tmpFile; //文件下载的临时信息 F1u)i
DataOutputStream output; //输出到文件的输出流 #\FT EY!
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//负责整个文件的抓取,控制内部线程(FileSplitterFetch类) pt!'v$G/*
public SiteFileFetch(SiteInfoBean bean) throws IOException 3IyZunFT
{ YF[$Q=7.
siteInfoBean = bean; pC^[ [5A
//tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); >[3X]n,0
tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); uW[3G
if(tmpFile.exists ()) dtW0\^ .L
{ *TnzkNN_,
bFirst = false; nxRwWj57
read_nPos(); 8M93cyX
} @ ^.*$E5
else ,/o(|sks
{ T\3 [F%?
nStartPos = new long[bean.getNSplitter()]; X4I]9t\
nEndPos = new long[bean.getNSplitter()]; HF4Lqh'oco
} V*qY"[
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} zh?4K*>.k
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public void run() BED@?:U# h
{ ?aJ6ug
//获得文件长度 QMb^&?;s
//分割文件 5bfb!7-[i
//实例FileSplitterFetch "?H+
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//启动FileSplitterFetch线程 Ar`\ N1a
//等待子线程返回 /.ZaE+
try{ M:|/ijpN
if(bFirst) Yw^ Gti'<
{ ;Q90Y&{L=$
nFileLength = getFileSize();
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if(nFileLength == -1) H-a^BZ&iU
{ -A;w$j6*
System.err.println("File Length is not known!"); "^"'uO$
} @XBH.A^7r
else if(nFileLength == -2)
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{ cHEz{'1m
System.err.println("File is not access!"); >Z"9rF2SW
} B/_6Ieb+
else EIK*49b2
{ #~e9h9
for(int i=0;i<nStartPos.length;i++) ,i![QXZ
{ ?#ihJt,
nStartPos = (long)(i*(nFileLength/nStartPos.length)); Z:^3Fm->+
} ^srs$
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for(int i=0;i<nEndPos.length-1;i++) Oxj(g;}
{ *H*\gaSh
nEndPos = nStartPos[i+1]; Y- ~;E3(
} GC?S];PL
nEndPos[nEndPos.length-1] = nFileLength; bX&e_Pd
} T/Q==Q{W:
} MCd F!{
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//启动子线程 <?4cWp|i
fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; Y eO-gY[b
for(int i=0;i<nStartPos.length;i++) a
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{ MLeX;He
fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), `:3&@.{T(
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), TK %<a/
nStartPos,nEndPos,i); oek #^:pF
Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); x/_dW
fileSplitterFetch.start(); EqQ3=XMUL@
} xXPUrv5zO
// fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), 9
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siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); xH@'H?
// Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", tx)OJY
nEndPos = " + nFileLength); G{O\)gf
// fileSplitterFetch[nPos.length-1].start(); MC6)=0:KX
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//等待子线程结束 iP,v=pS6
//int count = 0; ?q6Z's[
//是否结束while循环 8E
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boolean breakWhile = false; a+'}XEhSC:
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while(!bStop) } bCK
{ ;YM]K R;
write_nPos(); ex=)H%_|
Utility.sleep(500); 1^tSn#j
breakWhile = true; zM\IKo_"
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for(int i=0;i<nStartPos.length;i++) ~K%k
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{ Md?acWE*L
if(!fileSplitterFetch.bDownOver) c+wuC,
{ u YabJqV
breakWhile = false; ]'6'<S
break; K7S754m
} ysl8LK
} i.F8
if(breakWhile) gu!](yEgl
break; o[n<M>@
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//count++; b.@H1L
//if(count>4) F/xCG nP-
// siteStop(); u(8~4P0w
} F6DxvyANr
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System.err.println("文件下载结束!"); EZ*t$3.T
} 5'62ulwMP=
catch(Exception e){e.printStackTrace ();} NQg'|Pt(%
} b24di
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//获得文件长度 a" ^#!G<+
public long getFileSize() TG4^_nRl
{ gh'kUZG
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int nFileLength = -1; 89db5Dx
try{ LH,]vuXh
URL url = new URL(siteInfoBean.getSSiteURL()); 98h :X %
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); VZt;P%1;h
httpConnection.setRequestProperty("User-Agent","NetFox"); \u{Jf'g
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int responseCode=httpConnection.getResponseCode(); uvR0TIF4
if(responseCode>=400) gj[zka0_
{ U{HyxZ|q<
processErrorCode(responseCode); n$IWoIdbGN
return -2; //-2 represent access is error *&h6*zP?
} h)7v1,;w'
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String sHeader; 3_C98ClE
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for(int i=1;;i++) L,E-z_<p
{ ?ISI[hoc
//DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); "k/;`eAP
//Utility.log(in.readLine());
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sHeader=httpConnection.getHeaderFieldKey(i); "IOC[ #&G
if(sHeader!=null) 8?A@/
{ o@Scz!"g
if(sHeader.equals("Content-Length")) )\RzE[Cb
{ ix(U:'{
nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); =kwb`
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break; 7Y%!,ff
} yB
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} !?S5IGLOj
else V[4(~,9
break; KSF5)CZ5
} BN_!Y)Fl
} 5z9JhU
catch(IOException e){e.printStackTrace ();} G~JCgi
catch(Exception e){e.printStackTrace ();} _'H2>V_
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Utility.log(nFileLength); OY+!aG@.
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return nFileLength; Z@<q/2).|
} }m9S(Wal
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//保存下载信息(文件指针位置) d]^\w'w$
private void write_nPos() !1D%-=dWX
{ "1_{c *ck
try{ yW%&_s0
output = new DataOutputStream(new FileOutputStream(tmpFile)); BT&rp%NO6l
output.writeInt(nStartPos.length); czXI?]gg,
for(int i=0;i<nStartPos.length;i++) <+ -V5O^
{ ;Gjv9:hUn
// output.writeLong(nPos); jB*9 !xrd,
output.writeLong(fileSplitterFetch.nStartPos); 5}<.1ab3V
output.writeLong(fileSplitterFetch.nEndPos); qPp1:a"
}
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output.close(); LBW.*PHW
} iSnIBs9\
catch(IOException e){e.printStackTrace ();} .a
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catch(Exception e){e.printStackTrace ();} 0*37D5jH
} 3FGb Q_
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}".\
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//读取保存的下载信息(文件指针位置) tpN]evp|
private void read_nPos() /E=h{|
{ jXc5fXO
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try{ d,Hf-zJ%~
DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); PpX{+^z-%
int nCount = input.readInt(); L-^# 02
nStartPos = new long[nCount]; XMjI}SPG
nEndPos = new long[nCount]; p=:7 atE
for(int i=0;i<nStartPos.length;i++) N{?Tm`""
{ I@8+k&nXS
nStartPos = input.readLong(); v]LFZI5
nEndPos = input.readLong(); fs]#/* RR
} .d<~a1k
input.close(); P58\+9d_
} s4\SX,
catch(IOException e){e.printStackTrace ();} X7'h@>R
catch(Exception e){e.printStackTrace ();} wxdh?sQ
} ,apd3X%g
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private void processErrorCode(int nErrorCode) TKj/6Jz|
{ ui s:\Uc
System.err.println("Error Code : " + nErrorCode); T=hm#]
} 'US:Mr3
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//停止文件下载 9+WY@du+
public void siteStop() *Y|lO
{ 34&u]4=L)
bStop = true; V Z4nAG
for(int i=0;i<nStartPos.length;i++) mafAC73
fileSplitterFetch.splitterStop(); fJSV)\e0
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} e
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} ;XD>$t@
//负责部分文件的抓取 7)ES!C
**FileSplitterFetch.java :X1`wBu
*/ -ucz+{
package NetFox; <MI$Nl
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import java.io.*; @j)f(Zlu#
import java.net.*; ~FK+bF?%
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public class FileSplitterFetch extends Thread { Mt7X<?GZm
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String sURL; //File URL IdN%f]=/
long nStartPos; //File Snippet Start Position cG~_EX$
long nEndPos; //File Snippet End Position T1g:gfw@
int nThreadID; //Thread's ID s5_1}KKCs
boolean bDownOver = false; //Downing is over V!yp@%D
boolean bStop = false; //Stop identical ;n:H6cp
FileAccessI fileAccessI = null; //File Access interface |r<.R>
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public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException Z(Ls#hp
{ Px^<2Q%Fs
this.sURL = sURL; Yc|-sEK/
this.nStartPos = nStart; b_)QBE9
this.nEndPos = nEnd; {4V:[*3
nThreadID = id; &L[8Mju6
fileAccessI = new FileAccessI(sName,nStartPos);//定位 B8BY3~}]
} ]% ZjD
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public void run() Z;dwn~Tw
{ ^YB\\a9
while(nStartPos < nEndPos && !bStop) T^f&58{ 7
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try{ R, (+NT$
URL url = new URL(sURL); `qYc#_ELv
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); xr1I8 5kM
httpConnection.setRequestProperty("User-Agent","NetFox"); 0lJBtk9wn
String sProperty = "bytes="+nStartPos+"-"; FrE/K_L
httpConnection.setRequestProperty("RANGE",sProperty); i >/@]2
Utility.log(sProperty); fu7[8R"{
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InputStream input = httpConnection.getInputStream(); QtO[g
//logResponseHead(httpConnection); =-a?oH-
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byte[] b = new byte[1024]; O+3D
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int nRead; (t"YoWA#m
while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) C9^elcdv
{ )Sh;UW
nStartPos += fileAccessI.write(b,0,nRead); u.xA}yVS
//if(nThreadID == 1) U%SNROj
// Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); =fu_ Jau}
} 0 ^-b}
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Utility.log("Thread " + nThreadID + " is over!"); *^&iw$Qx3
bDownOver = true; b^|,9en
//nPos = fileAccessI.write (b,0,nRead); 6`{)p&9
} r0XGGLFuZl
catch(Exception e){e.printStackTrace ();} >=RHE@
} :[$i~V
} *TMM:w|1
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//打印回应的头信息 0^tJX1L
public void logResponseHead(HttpURLConnection con) I?xhak1)lu
{ ^LAS9K1.
for(int i=1;;i++) C J}4V!;|
{ =*O9)$b
String header=con.getHeaderFieldKey(i); G#=b6DB
if(header!=null) S3[oA&
//responseHeaders.put(header,httpConnection.getHeaderField(header)); L:]; [xa%
Utility.log(header+" : "+con.getHeaderField(header)); sjgxx7
else Q0oDl8~
break; '\3.isTsx
} DW;.R<8
} l>Oe ,`9O
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public void splitterStop() ^<H#dkECG
{ <MDFfnj
bStop = true; m$e@<~To
} [E&"9%K
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} m0K2 p~
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/* -1Ki7|0,
**FileAccess.java Szob_IEq,
*//文件访问(定位,写) RI].LB_
package NetFox; Tr+Y@]"
import java.io.*; os0"haOI9h
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public class FileAccessI implements Serializable{ m+JGe5fR<
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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 ?_`P;}4#
RandomAccessFile oSavedFile; n ;fTx
long nPos; .M#>@~XR
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public FileAccessI() throws IOException I5 7<