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**SiteFileFetch.java :*l\j"fX5
*/ X?r$o>db
package NetFox; QDK }e:4q
import java.io.*; bFA
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import java.net.*; 06pY10<>X
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public class SiteFileFetch extends Thread { 0iMfyW:
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SiteInfoBean siteInfoBean = null; //文件信息Bean "Rf|o6!d
long[] nStartPos; //开始位置 ,( hP /<
long[] nEndPos; //结束位置 Gh3f^PWnc
FileSplitterFetch[] fileSplitterFetch; //子线程对象
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long nFileLength; //文件长度 7D8 pb0`;J
boolean bFirst = true; //是否第一次取文件 Vd)
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boolean bStop = false; //停止标志 aiw4J
File tmpFile; //文件下载的临时信息 :Xx7':5
DataOutputStream output; //输出到文件的输出流 r24
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//负责整个文件的抓取,控制内部线程(FileSplitterFetch类)
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public SiteFileFetch(SiteInfoBean bean) throws IOException OMjx,@9
{ ^d9o \
siteInfoBean = bean; *li5/=UC5*
//tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); `Y '-2Fv
tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); sv\=/F@n
if(tmpFile.exists ()) )4YtdAV
{ -HFyNk]>
bFirst = false; --`W1!jI@
read_nPos(); :`@W`V?6-
} r)G)i;;~*
else %we! J%'Y]
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nStartPos = new long[bean.getNSplitter()]; R~dWblv
nEndPos = new long[bean.getNSplitter()]; PB{5C*Y7^k
} gX5.u9%C\
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} WD7T&i
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public void run() )Z`OkkabnD
{ r?Pk}Q
//获得文件长度 H]0(GLvH
//分割文件 M;0\fUh;
//实例FileSplitterFetch =vKSvQP@)
//启动FileSplitterFetch线程 f[$Z<:D-ve
//等待子线程返回 =XUt?5
try{ ? ,!C0t s
if(bFirst) pH?"@
{ 3.04Toq!
nFileLength = getFileSize(); +]#pm9
if(nFileLength == -1) m\|ie8
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System.err.println("File Length is not known!"); Snas:#B!
} S#Pni}JD
else if(nFileLength == -2) Ktf lbI!
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System.err.println("File is not access!"); !r_2b! dy
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else WcE/,<^*
{ nx`I9j\
for(int i=0;i<nStartPos.length;i++) ->U9u lTC
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nStartPos = (long)(i*(nFileLength/nStartPos.length)); B#x.4~YX
} -$kAWP8P4
for(int i=0;i<nEndPos.length-1;i++) l0{R`G,
{
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nEndPos = nStartPos[i+1]; d}]jw4
} 1bJrEXHXy
nEndPos[nEndPos.length-1] = nFileLength; LD)P.
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} g
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} SH M@H93
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//启动子线程 '"Y(2grP
fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; 3 n=ftkI
for(int i=0;i<nStartPos.length;i++) XVkCYh4,
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fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), Q96^rjY
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), H~r":A'"*
nStartPos,nEndPos,i); d,caO E8N
Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); *4|]=yPU
fileSplitterFetch.start(); X=i",5;
} ; )J\k2
// fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), VRa>bS
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); "AUHe6Yv
// Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", !qF t:{-h
nEndPos = " + nFileLength); jz72~+)T
// fileSplitterFetch[nPos.length-1].start(); 2io~pk>
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//等待子线程结束 Dk`(Wgk2
//int count = 0; Sn!5/9Y
//是否结束while循环 zyi;vu
boolean breakWhile = false; A
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while(!bStop) y$C\b\hM
{ C6{\^kG^j2
write_nPos(); UY$Lqe~
Utility.sleep(500); 8%Hc%T[RnT
breakWhile = true; !{%BfZX<&
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for(int i=0;i<nStartPos.length;i++) FEwPLViso
{ ni`uO<\U
if(!fileSplitterFetch.bDownOver) @[. 0,
{ SM8Wg>
breakWhile = false; hWD%_"yhd
break; >JckN4v
} r!e:sJAB.
} !}PZCbDhL
if(breakWhile) iw\yVd^]:k
break; qbD>)}:1
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//count++; >PmnR>x-rj
//if(count>4) #Q'j^y7=z
// siteStop(); +nU=)x?38
} '4"c#kCKL
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System.err.println("文件下载结束!"); 8$`$24Wx
} yB2}[1
catch(Exception e){e.printStackTrace ();} @<`P-+m
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//获得文件长度 '@dk3:3t
public long getFileSize() F_ -}GN%
{ )0?u_Z]w9
int nFileLength = -1; 7 >-(g+NF!
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URL url = new URL(siteInfoBean.getSSiteURL()); }?^]-`b
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); H7%q[O
httpConnection.setRequestProperty("User-Agent","NetFox"); vR4omB{
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int responseCode=httpConnection.getResponseCode(); F4PWL|1
if(responseCode>=400) U%)-_
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{ fUq:`#Q
processErrorCode(responseCode); `z$=J"%? y
return -2; //-2 represent access is error "</A)y&
} [*U.bRs
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String sHeader; sB8v:
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for(int i=1;;i++) 089v;
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//DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); K-[;w$np0
//Utility.log(in.readLine()); k)R~o
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sHeader=httpConnection.getHeaderFieldKey(i); a66Ns7Rb
if(sHeader!=null) B#r"|x# [
{ {Z1KU8tp
if(sHeader.equals("Content-Length")) CbwQbJ/v7
{ RFPcH8-u7
nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); <%.lPO]&E
break; XT?wCb41R
} Jl<pWjkZZ
} o)n=n!A
else T:SqENV
break; ;3XOk+
} 2!R+5^Iy
} NOmFQ)/ &
catch(IOException e){e.printStackTrace ();} _2hZGC%&E
catch(Exception e){e.printStackTrace ();} 9_O6Sl
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Utility.log(nFileLength); tUt_Q;%yC
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return nFileLength; Ym.{
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//保存下载信息(文件指针位置) yb,X
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private void write_nPos() &8I}q]'k
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try{ %CrTO(
output = new DataOutputStream(new FileOutputStream(tmpFile)); Km,%p@`m
output.writeInt(nStartPos.length); q\-P/aN_
for(int i=0;i<nStartPos.length;i++) ^#IE
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{ -{q'Tmst
// output.writeLong(nPos); ~nb(e$?N
output.writeLong(fileSplitterFetch.nStartPos); $ w+.-Tr
output.writeLong(fileSplitterFetch.nEndPos); j+rY
} |o+*Iy)
output.close(); [H{@<*
} @AM11v\:
catch(IOException e){e.printStackTrace ();} "
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catch(Exception e){e.printStackTrace ();} #d06wYz=
} W 1u!&:O
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//读取保存的下载信息(文件指针位置) (#Xs\IEV F
private void read_nPos() {> <1K6t
{ V]GF53D
try{ q#SEtyJL
DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); I9Uj3cL\
int nCount = input.readInt(); vCNq2l^CW
nStartPos = new long[nCount]; b(CO7/e>
nEndPos = new long[nCount]; !v(^wqna\
for(int i=0;i<nStartPos.length;i++) a
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nStartPos = input.readLong();
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nEndPos = input.readLong(); _/'VD!(MV
} H
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input.close(); S;jD@j\t&
} G+Bk!o
catch(IOException e){e.printStackTrace ();} >MSK.SNh
catch(Exception e){e.printStackTrace ();} q
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} Kn<+Au_]L
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private void processErrorCode(int nErrorCode) ?{jey_]M
{ /zb/am1#
System.err.println("Error Code : " + nErrorCode); %P M#gnt@
} D[?;+g/
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//停止文件下载 TnKv)%VF
public void siteStop() [f!
{
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bStop = true; g1}:;VG=
for(int i=0;i<nStartPos.length;i++) [7d(PEQL`
fileSplitterFetch.splitterStop(); ^_g%c&H
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} "]kzt ux
} &VA^LS@b
//负责部分文件的抓取 c"-X:m"
**FileSplitterFetch.java :Yn.Wv-
*/ +Ugy=678Tr
package NetFox; m;\nMdn
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import java.io.*; ?upd
import java.net.*; -gk2$P-
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public class FileSplitterFetch extends Thread { @'):rFr@F
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String sURL; //File URL x {Utf$|
long nStartPos; //File Snippet Start Position *?d\Zcj85[
long nEndPos; //File Snippet End Position G4*&9Wo
int nThreadID; //Thread's ID Yl>Y.SO
boolean bDownOver = false; //Downing is over Yj>4*C9
boolean bStop = false; //Stop identical ,b -
FileAccessI fileAccessI = null; //File Access interface " "m-5PGYo
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public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException
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{ %(p9AE
this.sURL = sURL; w(aj' i
this.nStartPos = nStart; 3^%2,
this.nEndPos = nEnd; jT$J~MpHh
nThreadID = id; PN?;\k)"
fileAccessI = new FileAccessI(sName,nStartPos);//定位 ! J<Xel{
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public void run() aT IzfqCM
{ f~\H|E8(
while(nStartPos < nEndPos && !bStop) hBnUpYec
{ 035jU '
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try{ RHn3\N
URL url = new URL(sURL); B
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HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); }(!Uq
httpConnection.setRequestProperty("User-Agent","NetFox"); B-w`mcqp$
String sProperty = "bytes="+nStartPos+"-"; rf|Nu3AJ
httpConnection.setRequestProperty("RANGE",sProperty); %m f)BC
Utility.log(sProperty); -O?HfQ
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InputStream input = httpConnection.getInputStream(); ~Yg)8
//logResponseHead(httpConnection); 4hxP`!<
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byte[] b = new byte[1024]; Xwo+iZ(a
int nRead; syg{qtBz^
while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) |3E|VGm~
{ 4[x`\
nStartPos += fileAccessI.write(b,0,nRead); %La7);SeY
//if(nThreadID == 1) 0]*W0#{Zj
// Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); DFQ`(1Q
} b3[[ Ah-
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Utility.log("Thread " + nThreadID + " is over!"); fi>.X99(G
bDownOver = true; mMl len
//nPos = fileAccessI.write (b,0,nRead); +JC"@
} wMN;<