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**SiteFileFetch.java U&/Jh^Yy
*/ 9\i,3:Qc
package NetFox; SD6xi\8
import java.io.*; CV4r31w
import java.net.*; vpUS(ztvs
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public class SiteFileFetch extends Thread { M#d_kDMw
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SiteInfoBean siteInfoBean = null; //文件信息Bean =1%3".
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long[] nStartPos; //开始位置 l\*}
long[] nEndPos; //结束位置 1HBch]J
FileSplitterFetch[] fileSplitterFetch; //子线程对象 '@Y@H,
long nFileLength; //文件长度 5_nkN`x
boolean bFirst = true; //是否第一次取文件 b'^-$
boolean bStop = false; //停止标志 UPPDs "
File tmpFile; //文件下载的临时信息 y2^r.6"O
DataOutputStream output; //输出到文件的输出流 Sj}@5 X6 C
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//负责整个文件的抓取,控制内部线程(FileSplitterFetch类) ;EE*#"IJ
public SiteFileFetch(SiteInfoBean bean) throws IOException xk}YeNVj
{ OXzJ%&h
siteInfoBean = bean; Ni GK|Z
//tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); 1z$;>+g<
tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); -rlxxLT+
if(tmpFile.exists ()) &S<tX]v
{ Vr f` :%
bFirst = false; d;(L@9HHD
read_nPos(); pP)0 l
} /H,!7!6>?
else j+J)S1
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nStartPos = new long[bean.getNSplitter()]; NQ{ XIN~
nEndPos = new long[bean.getNSplitter()]; p/'C
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} w=3@IW
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public void run() =[?2'riI
{ 'e\m6~u\hm
//获得文件长度 _pKW($\
//分割文件 -";'l@D=
//实例FileSplitterFetch VA)3=82n
//启动FileSplitterFetch线程 M:nXn7)+
//等待子线程返回 |z|5j!Nfh
try{ sN7I~
if(bFirst) _4rb7"b1
{ L;5jhVy
nFileLength = getFileSize(); co<){5zOT
if(nFileLength == -1) Uz\B^"i|
{ klKAwC Q,
System.err.println("File Length is not known!"); @
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} )-[ 2vhXz
else if(nFileLength == -2) g^^%4Y
{ fh
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System.err.println("File is not access!"); IJo`O
} ?a~=CC@
else }vxb, [#
{ hX 9.%-@sR
for(int i=0;i<nStartPos.length;i++) 0: h;ots'
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nStartPos = (long)(i*(nFileLength/nStartPos.length)); ]^&DEj{
} {{[).o/
for(int i=0;i<nEndPos.length-1;i++) ^QB/{9 #
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nEndPos = nStartPos[i+1]; ,u{d@U^)3@
} bu%@1:l
nEndPos[nEndPos.length-1] = nFileLength; o]}b#U8S
} pt(GpbtWK
} zV4%F"-
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//启动子线程 Yiu)0\ o
fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; Q9 kKk
for(int i=0;i<nStartPos.length;i++) A`=ESz
{ 27E6S)zv
fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), p2!x8`IB*
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), -deY,%
nStartPos,nEndPos,i); -d%bc?
Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); H<%7aOwO2
fileSplitterFetch.start(); 0[T!}F^%e
} FD#?pVyPn^
// fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), @*q\$Eg}2
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); ?Hf^&yo
// Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", doP4N6
nEndPos = " + nFileLength); E`iT>+LG<
// fileSplitterFetch[nPos.length-1].start(); EFf<|v
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//等待子线程结束 _xAdvr' W
//int count = 0; @p|[7'
//是否结束while循环 KHcfP7
boolean breakWhile = false; ^P:9iu)+]~
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while(!bStop) Rr4r[g#
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write_nPos(); +tdt>)a
Utility.sleep(500); w^p
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breakWhile = true; 20zIO.&o
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for(int i=0;i<nStartPos.length;i++) QCa$<~c
{ >efYpd#^
if(!fileSplitterFetch.bDownOver) //Hn[wEOh
{ -YA1Uk
breakWhile = false; mmTc.xh
break; f&8&UL>e`
} 5p94b*l
} ilayU
if(breakWhile) 5^GUuFt5m
break; H=Yl
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//count++; xlgN}M
//if(count>4)
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// siteStop(); ;'}1
} 4rwfY<G
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System.err.println("文件下载结束!"); /Kwo^Q{
} &UbNp8h
catch(Exception e){e.printStackTrace ();} M `Y~IG}
} WSi Utf|g
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//获得文件长度 sA3 4`ZAa
public long getFileSize() ' "~|L>F%G
{ hP`3Ao
int nFileLength = -1;
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try{ GLnj& Ve
URL url = new URL(siteInfoBean.getSSiteURL()); %OfaBv&
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); w;}P<K
httpConnection.setRequestProperty("User-Agent","NetFox"); ztgSd8GGE
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int responseCode=httpConnection.getResponseCode(); 3UslVj1u
if(responseCode>=400) 1f~unb\Gg
{ o`M7:8G
processErrorCode(responseCode); i)+@'!6
return -2; //-2 represent access is error D7[ 8*^
} #XQEfa
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String sHeader; KNQX\-=
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for(int i=1;;i++) SD8Q_[rY
{ V. =! ^0'A
//DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); ;[ pyKh
//Utility.log(in.readLine()); &=<x&4H+
sHeader=httpConnection.getHeaderFieldKey(i); (gvaYKvr
if(sHeader!=null) "CT'^d+
{ fg*IHha
if(sHeader.equals("Content-Length")) p r(:99~3
{ tL 3]9qfj
nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); K> lA6i7?
break; %^2LTK(P
} ^7Z)/c`"
} jU@qQ@|
else J6n@|L!yO
break; (](:0H
} ,m8l
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} xs.>+(@|;
catch(IOException e){e.printStackTrace ();} B r`Xw^S
catch(Exception e){e.printStackTrace ();} &]ts*qCEL
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Utility.log(nFileLength); DNLqipUw
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return nFileLength; h-<('w:A
} S'9T>&<Kn
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//保存下载信息(文件指针位置) wta\C{{
private void write_nPos() ?Z.p.v
{ -3_-n*k!
try{ )0j^Fq5[+
output = new DataOutputStream(new FileOutputStream(tmpFile)); ">v76%>Z7
output.writeInt(nStartPos.length); eL0U5>#
for(int i=0;i<nStartPos.length;i++) #[qmhU{s
{ =n
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// output.writeLong(nPos); 8l~]}2LAs
output.writeLong(fileSplitterFetch.nStartPos); ltwX-
output.writeLong(fileSplitterFetch.nEndPos); aiF7\^aw$
} brl(7_2
output.close(); r0+lH:G*q
} g`d5OHvOo
catch(IOException e){e.printStackTrace ();} ;
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catch(Exception e){e.printStackTrace ();} 0x4Xs
} K``MS
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//读取保存的下载信息(文件指针位置) 3 i Id>
private void read_nPos() Q0#oR[(
{ Rf^$?D&^
try{ |j^^*z@
DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); (Dlh;Ic
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int nCount = input.readInt(); $.a<b^.Xi
nStartPos = new long[nCount]; o:.={)rX
nEndPos = new long[nCount]; 5@%$M$E
for(int i=0;i<nStartPos.length;i++) MT[V1I{LV
{ sG=D(n1
nStartPos = input.readLong(); T&oY:1D,g
nEndPos = input.readLong(); 3%bCv_6B
} )M<"YI)g
input.close(); -+Axa[,5=
} 9y{[@KG
catch(IOException e){e.printStackTrace ();} =3]}87
catch(Exception e){e.printStackTrace ();} F=7X,hK
} 6NPCp/
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private void processErrorCode(int nErrorCode) <1YINkRz
{ :1^
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System.err.println("Error Code : " + nErrorCode); $A;jl`ng
} UOJx-o!c?
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//停止文件下载 $sTbFY
public void siteStop() ~Z9Eb|B
{ lr'h
bStop = true; !8 lG"l|,l
for(int i=0;i<nStartPos.length;i++) cfBq/2I
fileSplitterFetch.splitterStop();
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} J3fk3d`2
} =
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//负责部分文件的抓取 )_k"_VVcC
**FileSplitterFetch.java IppzQ0'=y1
*/ Ls< ";QJc
package NetFox; @<=x fs
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import java.io.*; )h6hN"#V5
import java.net.*; g HdNqOy
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public class FileSplitterFetch extends Thread { Ydm0
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String sURL; //File URL )9I>y2WU~
long nStartPos; //File Snippet Start Position Aslh}'$}-
long nEndPos; //File Snippet End Position #5)0~4%l
int nThreadID; //Thread's ID qB6@OS
boolean bDownOver = false; //Downing is over #S)]`YW
boolean bStop = false; //Stop identical sL" h
FileAccessI fileAccessI = null; //File Access interface @ol=gBU
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public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException I,TJV)B
{ ,cZhkXd
this.sURL = sURL; Y )#x(s?t
this.nStartPos = nStart; R % [ZQK
this.nEndPos = nEnd; ~A@T_*0
nThreadID = id; cq lA"Eof
fileAccessI = new FileAccessI(sName,nStartPos);//定位 G&=4@pLY5
} ,)/gy)~#
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public void run() Zk,`
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{ kt`_n+G
while(nStartPos < nEndPos && !bStop) BIGln`;,f
{ EQ
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try{ ~tK4C |
URL url = new URL(sURL); Hdvtgss!
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); CD]hi,B_J
httpConnection.setRequestProperty("User-Agent","NetFox"); o>WB,i^ G
String sProperty = "bytes="+nStartPos+"-"; <Qg).n>;z
httpConnection.setRequestProperty("RANGE",sProperty); 8(-V pU
Utility.log(sProperty); ffoL]u\
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InputStream input = httpConnection.getInputStream(); F6
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