/* ~!nLbK2
**SiteFileFetch.java W NwJM
*/ b&lN%+%}
package NetFox; f{y]
import java.io.*; /OQK/
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import java.net.*; Si?$\H*:
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public class SiteFileFetch extends Thread { L@{!r=%_>
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SiteInfoBean siteInfoBean = null; //文件信息Bean X5uS>V%/
long[] nStartPos; //开始位置 AVXX\n\_
long[] nEndPos; //结束位置 `y\*m]:
FileSplitterFetch[] fileSplitterFetch; //子线程对象 "wA0 LH_
long nFileLength; //文件长度
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boolean bFirst = true; //是否第一次取文件 M"=8O>NZ2
boolean bStop = false; //停止标志 $h G;2v
File tmpFile; //文件下载的临时信息 EKZ$Q4YE
DataOutputStream output; //输出到文件的输出流 s<A*[
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//负责整个文件的抓取,控制内部线程(FileSplitterFetch类) hq/J6 M
public SiteFileFetch(SiteInfoBean bean) throws IOException *0%4l_i
{ )n\*ht7
siteInfoBean = bean; .A3DFm3 t
//tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); gw_|C|!P
tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); p=!#],[
if(tmpFile.exists ()) BRQ"A,
{ aB6Ye/Io
bFirst = false; &EAk
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read_nPos(); [096CK
} <Ctyht0c.
else ,f}h}
{ H4M{_2DO
nStartPos = new long[bean.getNSplitter()]; `1nRcY
nEndPos = new long[bean.getNSplitter()]; 9<xTu>7J
} BG'6;64kx6
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public void run() {mNdL J
{ ?n!lUr$:y
//获得文件长度 4\p$4Hs}
//分割文件 \% }raI;Y@
//实例FileSplitterFetch vG Y!4@[
//启动FileSplitterFetch线程 Y4QLs^IdB
//等待子线程返回 p3g4p
try{ Xo2^N2I
if(bFirst) Mv|vRx^b
{ p1+7<Y:
nFileLength = getFileSize(); sz'p3
if(nFileLength == -1) b.QpHrnhtK
{ cp$.,V
System.err.println("File Length is not known!"); :@.C4oq
} :~yzDk\I"-
else if(nFileLength == -2) ,{?wKXJ}L!
{ H{ZLk,
System.err.println("File is not access!"); @gNpJB]V
} ~eDI$IO
else K}
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for(int i=0;i<nStartPos.length;i++) -
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{ )AOPiC$jL
nStartPos = (long)(i*(nFileLength/nStartPos.length)); $4=Ne3y
} [M4xZHd#o
for(int i=0;i<nEndPos.length-1;i++) sF y]+DB
{ =(%*LY!Xc
nEndPos = nStartPos[i+1]; D/Rv&>Jh
} NdZ)[f:2
nEndPos[nEndPos.length-1] = nFileLength; }d_<\
} DB#$~(o
} `%|u!
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//启动子线程 ;v_ls)_,-
fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; u=%y
for(int i=0;i<nStartPos.length;i++) o~= iy
{ s3seK6x'
fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), ~]&B>q
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), dsV ~|D6:
nStartPos,nEndPos,i); 7R: WX:
Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); ozU2
fileSplitterFetch.start(); /J;;|X#P
} {B3(HiC
// fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), 6#E7!-u(-
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); yr5NRs
// Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", )!i!3
nEndPos = " + nFileLength); ,(P %z.P@
// fileSplitterFetch[nPos.length-1].start(); D3y>iQd
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//等待子线程结束 q-YL]PgV
//int count = 0; Q\|18wkW
//是否结束while循环 6J\q`q(W(
boolean breakWhile = false; Lx%:t YZ
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while(!bStop) v; Es^
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{ pajy#0 U
write_nPos(); G.Tpl-m
Utility.sleep(500); n'yl)HA~>`
breakWhile = true; #7o0dE;Kg9
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for(int i=0;i<nStartPos.length;i++) ilv _D~|
{ M|k&TTV
if(!fileSplitterFetch.bDownOver)
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{ to'j2jP
breakWhile = false; ,ijW(95{k
break; yw'ezpO"
} JA<~xo[Q9
} )6=gooe]
if(breakWhile) GMdI0jaG#
break; 7H%_sw5S.
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//count++; Wab.|\c
//if(count>4) [t{](-
// siteStop(); .a:Z!KF
} x6ahZ
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System.err.println("文件下载结束!"); 6 Uw;C84!
} ^!}F%
catch(Exception e){e.printStackTrace ();} iS
} _s*!
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//获得文件长度 &:No}6
public long getFileSize() t!{x<9
{ l<xFnj
int nFileLength = -1; EjSD4
try{ B'p5M.6d#:
URL url = new URL(siteInfoBean.getSSiteURL()); MqdB\OW&
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); MtUY?O.P2
httpConnection.setRequestProperty("User-Agent","NetFox"); ~M*gsW$
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int responseCode=httpConnection.getResponseCode(); Xhse~=qA
if(responseCode>=400) P>wZ~Hjk
{ #h N.=~
processErrorCode(responseCode); .!yq@Q|=u
return -2; //-2 represent access is error 4fty~0i=z
} uoCGSXsi
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String sHeader; sKd)BA0`
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for(int i=1;;i++) hJ[UB
{ N@()F&e
//DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); *S4aF*Qk
//Utility.log(in.readLine()); TKOP;[1h
sHeader=httpConnection.getHeaderFieldKey(i); 1Nj=B_T
if(sHeader!=null) f=m/
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{ o?wt$j-
if(sHeader.equals("Content-Length")) ln#\sA?iG
{ &SmXI5>Bo0
nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); U:n*<l-k}
break; EkZjO Ci
} K]<u8eF
} zQc"bcif5(
else k 4B_W
break; OQFi.8
} F;kvH
} KjOi(YUnq7
catch(IOException e){e.printStackTrace ();} @9vvR7{P
catch(Exception e){e.printStackTrace ();} tOH0IE c
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Utility.log(nFileLength); XWtiwf'K
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return nFileLength; azX`oU,l
} )%VCzye*{
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//保存下载信息(文件指针位置) {|6z+vR
private void write_nPos() gz61FW
{ 5B*qbM
try{ $.:3$et@/
output = new DataOutputStream(new FileOutputStream(tmpFile)); fHfY}BQS
output.writeInt(nStartPos.length); y5u\j{?Te
for(int i=0;i<nStartPos.length;i++) )gXTRkmw
{ G),db%,X2
// output.writeLong(nPos); 9m8ee&,
output.writeLong(fileSplitterFetch.nStartPos); tU:FX[&?R
output.writeLong(fileSplitterFetch.nEndPos); Qq3fZ=
} `6F+Rrn
output.close(); w$>3pQ8d
} {/ &B!zvl
catch(IOException e){e.printStackTrace ();} h8=h >W-
catch(Exception e){e.printStackTrace ();} Qra> }e%*
} &{W^W8,%
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//读取保存的下载信息(文件指针位置) x?L hq2
private void read_nPos() V]c5
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{ 5pJ*1pfeo
try{ L~eAQR
DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); bUs|t
int nCount = input.readInt(); t5)J;0/
nStartPos = new long[nCount]; TyOH`5D
nEndPos = new long[nCount]; ~/|zlu*jpc
for(int i=0;i<nStartPos.length;i++) _tj&Psp
{ nwf7M#3d
nStartPos = input.readLong(); 4#:\?HAu!
nEndPos = input.readLong(); ~NNv>5t5
}
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input.close(); }-p,iTm
}
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catch(IOException e){e.printStackTrace ();} @^?XaU
catch(Exception e){e.printStackTrace ();} YwAnqAg
} kon=il<@
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private void processErrorCode(int nErrorCode) 7lU.Nit
{ ow.j+<M
System.err.println("Error Code : " + nErrorCode); Y=Hz;Ni
} xR908+>5
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//停止文件下载 ;&,.TC?l
public void siteStop() Bq!cY Wj
{ xo
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bStop = true; If'2rE7J
for(int i=0;i<nStartPos.length;i++) n93zD*;5
fileSplitterFetch.splitterStop(); )(bxpW
j} RzXJ~t
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} yVS\Q,:J9
} FT/amCRyT
//负责部分文件的抓取 HC7JMj
**FileSplitterFetch.java U8O(;+
*/ zj%cQkZ
package NetFox; ]W)
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import java.io.*; FFe)e>bH
import java.net.*; 9$O@`P\
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public class FileSplitterFetch extends Thread { Fe$/t(
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String sURL; //File URL EXpSh}
long nStartPos; //File Snippet Start Position *^h_z;{,
long nEndPos; //File Snippet End Position K{b-TT
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int nThreadID; //Thread's ID @G GccF
boolean bDownOver = false; //Downing is over Pp_V5,i\
boolean bStop = false; //Stop identical 9Nt3Z>d
FileAccessI fileAccessI = null; //File Access interface d
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public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException hz)9"B\S
{ f\K#>u*
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this.sURL = sURL; 2F?kjg,
this.nStartPos = nStart; n`L,]dco
this.nEndPos = nEnd; gb 4pN
nThreadID = id; nGrVw&
fileAccessI = new FileAccessI(sName,nStartPos);//定位 +t]Xj1Q
} 3s(Ia^
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public void run() z[&s5"
{ ]k+m=OR{/
while(nStartPos < nEndPos && !bStop) )saR0{e0N
{ Q$=*aUU%G
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try{ xb$yu.c
URL url = new URL(sURL); yFM>T\@
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); OVs wt
httpConnection.setRequestProperty("User-Agent","NetFox"); dZ2`{@AYY
String sProperty = "bytes="+nStartPos+"-"; 8$}OS-
httpConnection.setRequestProperty("RANGE",sProperty); Oif,|:
Utility.log(sProperty); Vxh.<b6&'
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InputStream input = httpConnection.getInputStream(); N z~"vi(t
//logResponseHead(httpConnection); AcC8)xRpk4
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byte[] b = new byte[1024]; @ {}rG8
int nRead; 3jPB#%F
while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) >oqZ !V5[
{ |}S1o0v{(a
nStartPos += fileAccessI.write(b,0,nRead); t26ij`V
//if(nThreadID == 1) ^
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// Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); DQgH_!
} CLK^ gZ
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Utility.log("Thread " + nThreadID + " is over!"); 6
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bDownOver = true; Do;#NLrWb
//nPos = fileAccessI.write (b,0,nRead); =nhzMU9c\y
} *Bw #c
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catch(Exception e){e.printStackTrace ();} U e*$&VlT
} {ZqQ!!b
} &!1}`4$[T
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//打印回应的头信息 K{L.ZH>7
public void logResponseHead(HttpURLConnection con) Z?1OdoT-
{ 6?SFNDQ"C
for(int i=1;;i++) g6euXI
{ v0 ];W|
String header=con.getHeaderFieldKey(i); oI@9}*
if(header!=null) -:]@HD :
//responseHeaders.put(header,httpConnection.getHeaderField(header)); frH)_ YJ%
Utility.log(header+" : "+con.getHeaderField(header)); !_^g8^>2(
else %f!iHo+Z
break; qrDcL>Hrn
} T[2}p=<%
} 3j*'HST
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public void splitterStop() l)8sw=
{ 7/>a:02
bStop = true; abWl ut
} Sdc*rpH"(
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} 2R`u[
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/* 4}-#mBV]/
**FileAccess.java wj%wp[KA$
*//文件访问(定位,写) -1W
package NetFox; yXF|Sqv
import java.io.*; &r@H(}$1\
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public class FileAccessI implements Serializable{ cU+>|'f&
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//RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 kZ[mM'u#
RandomAccessFile oSavedFile; ]^@0+!
long nPos; I,j3bC
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public FileAccessI() throws IOException u^=@DO'
{ jG8;]XP
this("",0); btQet.
} @^CG[:|
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public FileAccessI(String sName,long nPos) throws IOException uaxB -PZ
{ :qnokrGzB
oSavedFile = new RandomAccessFile(sName,"rw"); 1nB@zBQu-
this.nPos = nPos; sqG`"O4W
oSavedFile.seek(nPos); J@`
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} DHzkRCM
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public synchronized int write(byte[] b,int nStart,int nLen) 1+^n!$
{ xG%*PNM0q
int n = -1; F+*Q <a4
try{ %6 ]\^
oSavedFile.write(b,nStart,nLen); 4oJ$dN
n = nLen; U**)H_S/~
} yW>R RE;
catch(IOException e) J3&Sj{ o
{ JS7dsO0;
e.printStackTrace (); (C\r&N