/* $8^Hkxy
**SiteFileFetch.java \gA!)q.;
*/ }[0nTd
package NetFox; qqDg2,Yb
import java.io.*; Z\
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import java.net.*; =v2|QuS$
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public class SiteFileFetch extends Thread { I0XJ&P%
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SiteInfoBean siteInfoBean = null; //文件信息Bean =D<0&M9C
long[] nStartPos; //开始位置 Ft5A(P >
long[] nEndPos; //结束位置 *%xbn8
FileSplitterFetch[] fileSplitterFetch; //子线程对象 Y ^^4n$
long nFileLength; //文件长度 4m*)("H
boolean bFirst = true; //是否第一次取文件 Dka,v
boolean bStop = false; //停止标志 C-M_:kQ[U
File tmpFile; //文件下载的临时信息 +p 6Ty2rz
DataOutputStream output; //输出到文件的输出流 xHgC':l(0
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//负责整个文件的抓取,控制内部线程(FileSplitterFetch类) *_D/_Rp7
public SiteFileFetch(SiteInfoBean bean) throws IOException N{J
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{ TzL|{9
siteInfoBean = bean; 0O3O^
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//tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); XgxE M1(
tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); #X Q/y} (
if(tmpFile.exists ()) gL<n?FG4b
{ qu B[S)2}
bFirst = false; 5 -i,Tx&:
read_nPos(); <83Ky;ry
} fPeS;
else EP:`l
{ Po ?MTA
nStartPos = new long[bean.getNSplitter()]; @O"7@%nu
nEndPos = new long[bean.getNSplitter()]; zgD?e?yPO
} Q68~D.V%r
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} V?XQjH1X
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public void run() @CNJpQ ujn
{ pg{VKrT`
//获得文件长度 8D.c."q
//分割文件 <]Td7-n
//实例FileSplitterFetch .7Mf(1:
//启动FileSplitterFetch线程 7hJX
//等待子线程返回 yaz6?,)
try{ Yxq!7J
if(bFirst) ~n=DI/AJ@-
{ 2u.0AG
nFileLength = getFileSize(); ^ITF*
if(nFileLength == -1) Sk{skvd;
{ bPVk5G*ruP
System.err.println("File Length is not known!"); 461g7R%r
} 8063LWV
else if(nFileLength == -2) SkuR~!
{ b<FE
System.err.println("File is not access!"); ('x]@
} s|%R
else x3n9|Uud
{ "B'c;0@q
for(int i=0;i<nStartPos.length;i++) >0HH#JW
{ WK|5:V8E
nStartPos = (long)(i*(nFileLength/nStartPos.length)); .\_):j*
}
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for(int i=0;i<nEndPos.length-1;i++) k4Q>J,k
{ Gz&} OO
nEndPos = nStartPos[i+1]; O)jD2X?
} 1Uup.(
nEndPos[nEndPos.length-1] = nFileLength; ]i
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} Kq[4I[+R
} I>?oVY6M@u
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//启动子线程 kQkc+sGJf
fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; 36.,:!%p
for(int i=0;i<nStartPos.length;i++) @gN"Q\;F
{ O2fq9%lk
fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), !hVbx#bXl
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), oC`F1!SfOO
nStartPos,nEndPos,i); :M(uP e=D
Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); Sp>g77@
fileSplitterFetch.start(); !E$$FvL
} n])#<0
// fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), Wt/;iq"
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); 2E }vuw=c
// Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", z~Q=OPCnY
nEndPos = " + nFileLength); aL1%BGlmZ<
// fileSplitterFetch[nPos.length-1].start(); -
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//等待子线程结束 L-+g`
//int count = 0; 6R45+<.
//是否结束while循环 T'p L&@,Q
boolean breakWhile = false;
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while(!bStop) #*bmwb*i
{ y#'hOSR2
write_nPos(); yzN[%/
Utility.sleep(500); 1AAyzAP9`
breakWhile = true; i#-v4g
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for(int i=0;i<nStartPos.length;i++) `,]Bs*~
{ 8>YF}\D V
if(!fileSplitterFetch.bDownOver) 1<ag=D`F_"
{ )-
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breakWhile = false; zT>!xGTu7~
break; 6*i**
} ET.jjV
} c)#P}Ai
if(breakWhile) l5-[a
break; !<M
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//count++; oPi>]#X
//if(count>4) 2 GRI<M
// siteStop(); Ay(p~U;gN*
} CM?:\$ 4
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System.err.println("文件下载结束!"); B@F@,?K4%
} v@$N,g
catch(Exception e){e.printStackTrace ();} 9JFN8Gf*)
} ! AwMD
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//获得文件长度 y?OP- 27y
public long getFileSize() %mC@}
{ ny{C,1QG
int nFileLength = -1; Om*QN]lGq
try{ CY o
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URL url = new URL(siteInfoBean.getSSiteURL()); ILm+o$o~
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); '?C6P5fm
httpConnection.setRequestProperty("User-Agent","NetFox");
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int responseCode=httpConnection.getResponseCode(); F'XQoZ* 1
if(responseCode>=400) M">v4f&K1!
{ jz8u'y[n7
processErrorCode(responseCode); &3SS.&g4W
return -2; //-2 represent access is error \\SQACN
} 1gHe$dzXk
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String sHeader; m[}P
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for(int i=1;;i++) .HZ d.*
{ h,{Q%sqO
//DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); | In{5Ek
//Utility.log(in.readLine()); l\Ozy
sHeader=httpConnection.getHeaderFieldKey(i); ( eKgc
if(sHeader!=null) aMI;;iL^
{ +RJ{)Nec
if(sHeader.equals("Content-Length")) 0%bCP/
{ NQqw|3
nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); l>\EkUT
break; ^BF}wQb:j
} [-\ Y?3
} ]r;rAOWVV
else wlNL;W@w
break; lgews"
} WX4sTxJK
} kgo#JY-4
catch(IOException e){e.printStackTrace ();} >SXSrXyYX
catch(Exception e){e.printStackTrace ();} k>ErDv8
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Utility.log(nFileLength); SRfh{u
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return nFileLength; q=t!COS
} -jJhiaJ$<
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//保存下载信息(文件指针位置) eJoM4v
private void write_nPos() h8(#\E
{ eKr>>4,-P
try{ [+o{0o>
output = new DataOutputStream(new FileOutputStream(tmpFile)); D|OGlP
output.writeInt(nStartPos.length); WRZpu95v
for(int i=0;i<nStartPos.length;i++) }sxs-
{ +Q+O$-a<
// output.writeLong(nPos); 6Rfv3
output.writeLong(fileSplitterFetch.nStartPos); !` 1h *}
output.writeLong(fileSplitterFetch.nEndPos); eV"%(<{
} i\CA6I
output.close(); 7RT{RE
} wm@j(h4
catch(IOException e){e.printStackTrace ();} B?%u<F
catch(Exception e){e.printStackTrace ();} lfAy$qP"}
} $$ND]qM$M
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//读取保存的下载信息(文件指针位置) 1NP
private void read_nPos() _\>y[e["p
{ 2mEqfy
try{ x/<ow4C
DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); mW{;$@PLF"
int nCount = input.readInt(); GXZ="3W |
nStartPos = new long[nCount]; Qm[((6}
nEndPos = new long[nCount]; i$y=tJehi
for(int i=0;i<nStartPos.length;i++) QD.5oS
{ =OK#5r[UV
nStartPos = input.readLong(); k5< n:dS
nEndPos = input.readLong(); _YX% M|#
} 04U|Frc
input.close(); }tt%J[
} 1 fcV&qHR
catch(IOException e){e.printStackTrace ();} FJ84'T\~
catch(Exception e){e.printStackTrace ();} bbjba36RO
} $tu
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private void processErrorCode(int nErrorCode) 6 :4GI
{ ; Pk"mC
System.err.println("Error Code : " + nErrorCode); OD'~t,St
} :kHk'.V1(
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//停止文件下载 /6rjGc
public void siteStop() Mg\588cI
{ .Vt|;P}
bStop = true; K21Xx`XK
for(int i=0;i<nStartPos.length;i++) (m1m}* @
fileSplitterFetch.splitterStop(); wA{)9.
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} d*+}_EV)Y3
} "dCIg{j
//负责部分文件的抓取 %# uw8V
**FileSplitterFetch.java Wqv7
*/ t'F$/mx.
package NetFox; q<\r}1Dm
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import java.io.*; ScJ:F-@>
import java.net.*; xd3mAf
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public class FileSplitterFetch extends Thread { X)SUFhP\
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String sURL; //File URL Oi?Q^ISxP
long nStartPos; //File Snippet Start Position 3R/6/+S-
long nEndPos; //File Snippet End Position ;7Qe m&
int nThreadID; //Thread's ID xFUD9TM
boolean bDownOver = false; //Downing is over u&p8S#e
boolean bStop = false; //Stop identical ^I/(9KP#
FileAccessI fileAccessI = null; //File Access interface "a(R>PV%
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public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException
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{ 9I 6^-m@:
this.sURL = sURL; Yaq0mef0
this.nStartPos = nStart; ,dba:D=l
this.nEndPos = nEnd; 3Dc^lfn
nThreadID = id; ' q9Ejig
fileAccessI = new FileAccessI(sName,nStartPos);//定位 -T+yS BO_3
} -6 v?iiZr
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public void run() Rt%Dps%
{ _BG`!3U+
while(nStartPos < nEndPos && !bStop) *QW.#y>"j
{ 9^SrOW6~
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try{ 3sBWtz
URL url = new URL(sURL); w;VUP@Wm
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); lItr*,A]
httpConnection.setRequestProperty("User-Agent","NetFox"); a[^dK-
String sProperty = "bytes="+nStartPos+"-"; Ahd{f!
httpConnection.setRequestProperty("RANGE",sProperty); yPbOiA*lHz
Utility.log(sProperty);
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InputStream input = httpConnection.getInputStream(); y^p%/p%
//logResponseHead(httpConnection); YVY(uq)d
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byte[] b = new byte[1024]; g2
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int nRead; 'U`I
while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) /-pop]L
{ ,Ur~DXY
nStartPos += fileAccessI.write(b,0,nRead); BcGQpv&x
//if(nThreadID == 1) >|T?87
// Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); .>zkS*oX4z
} J! eVw\6
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Utility.log("Thread " + nThreadID + " is over!"); I|[aa$G
bDownOver = true; ZoC?9=k
//nPos = fileAccessI.write (b,0,nRead); D+_PyK~jc
} EZiGi[t7
catch(Exception e){e.printStackTrace ();} "=!QSb
} PZA;10z
} &9] [~$
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//打印回应的头信息 !"J*
public void logResponseHead(HttpURLConnection con) zck |jhJ6
{ !r!Mq~X<=
for(int i=1;;i++) R}+/jh2O|
{ J&: