/* Y1yXB).AH8
**SiteFileFetch.java lNh=>DPu
*/ ]*g ss'N
package NetFox; A|
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import java.io.*; !8
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import java.net.*; K{=r.W
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public class SiteFileFetch extends Thread { iO?gF
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SiteInfoBean siteInfoBean = null; //文件信息Bean Y uw
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long[] nStartPos; //开始位置 (}*\ {
long[] nEndPos; //结束位置 F;?TR[4!k
FileSplitterFetch[] fileSplitterFetch; //子线程对象 (EOec5qXU
long nFileLength; //文件长度 Lt;.Nw
boolean bFirst = true; //是否第一次取文件 ~4=]%XYz
boolean bStop = false; //停止标志 ,<;l"v(
File tmpFile; //文件下载的临时信息 M 5T=Fj86
DataOutputStream output; //输出到文件的输出流 :\1rQT
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//负责整个文件的抓取,控制内部线程(FileSplitterFetch类) uGP[l`f|FQ
public SiteFileFetch(SiteInfoBean bean) throws IOException X|-v0 f
{ (5Z8zNH`3
siteInfoBean = bean; 8g#
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//tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); mJGO)u&
tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); V(lK`dY
if(tmpFile.exists ()) GG@I!2,_
{ gfdPx:7^
bFirst = false; t3
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read_nPos(); e-%7F]e
} k lP{yxU'n
else xI`Uk8- 8
{ |iwM9oO%
nStartPos = new long[bean.getNSplitter()]; %S
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nEndPos = new long[bean.getNSplitter()]; jlRl2 #"
} ,yHzo
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} 7GBZA=J
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public void run() d$"G1u~%
{ jpYw#]Q
//获得文件长度 B%%.@[o,
//分割文件 <?>I\
//实例FileSplitterFetch 3D?IG\3
//启动FileSplitterFetch线程 :Bx+WW&P.i
//等待子线程返回 dDv{9D,
try{ O:`GL1{ve?
if(bFirst) RQj`9F
{ E(aX4^]g
nFileLength = getFileSize(); " ;-{~
if(nFileLength == -1) */%$6s~
{ $I)Tk`=
System.err.println("File Length is not known!"); V!pq,!C$v
} sW]yuu!/
else if(nFileLength == -2) v F.?] u
{ wE,=%?"
System.err.println("File is not access!"); I<D&,LFH*w
} 2cs?("8e%
else aJK-O"0/
{ c{'$=lR "
for(int i=0;i<nStartPos.length;i++) ys&"r":I
{ g^s+C Z
nStartPos = (long)(i*(nFileLength/nStartPos.length)); Ht`<XbQ>
} 7.7Cluh5,
for(int i=0;i<nEndPos.length-1;i++) '|YtNhWZ?
{ ILkjz^
nEndPos = nStartPos[i+1]; }
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} ')AByD}Hi]
nEndPos[nEndPos.length-1] = nFileLength; _%A/ )
} D:YN_J"kV
} l1-4n*fU
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//启动子线程 5z9r S<
fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; T!m42EvIvE
for(int i=0;i<nStartPos.length;i++) $\0cJCQ3
{ |Q5H9<*
fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), D 7Gd%
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), f0-RhR
nStartPos,nEndPos,i); $Qn&jI38
Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); 9O),/SH;:
fileSplitterFetch.start(); g>6:CG"
} HO266M
// fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), 89*S?C1
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); bh= \
// Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", J>f
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nEndPos = " + nFileLength); 3q'K5}
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// fileSplitterFetch[nPos.length-1].start(); +O|_P`HBoI
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//等待子线程结束 tpv?`(DDU
//int count = 0; QT`fix{
//是否结束while循环 _Ct}%-,4
boolean breakWhile = false; Y;fuh[#
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while(!bStop) `y1BTe&
{ umJay/>
write_nPos(); +V2C}NQ5R
Utility.sleep(500); 5T!&r
breakWhile = true; Nawp t%
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for(int i=0;i<nStartPos.length;i++)
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{ 5/Ydv
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if(!fileSplitterFetch.bDownOver) *
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{ {&u Rd?(
breakWhile = false; u=(H#o<#
break; WEno+Z~=1'
} ;
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} n(Qj||:
if(breakWhile) jIKBgsiF/
break; w+Ad$4Pf"
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//count++; ]a8eDy
//if(count>4) 4;?1Kb#
// siteStop(); 1oB$MQoc
} ymHKcQ
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System.err.println("文件下载结束!"); ZQ@3P7T
} 7TP$
catch(Exception e){e.printStackTrace ();} A3xbT\xdg
} [`q.A`Fd
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//获得文件长度 "K8nxnq
public long getFileSize() P<8LAc$T
{ yxqTm%?y
int nFileLength = -1; HS7R lU^
try{ MY&<)|v\
URL url = new URL(siteInfoBean.getSSiteURL()); TV<Aj"xw
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); pH^ z
httpConnection.setRequestProperty("User-Agent","NetFox"); c qv.dC
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int responseCode=httpConnection.getResponseCode(); y*_K=}pk
if(responseCode>=400) %?@x]B9Y8E
{ =1O?jrl~q
processErrorCode(responseCode); AD(xaQ&T
return -2; //-2 represent access is error O)l%OOv
} l+oDq'[q"
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String sHeader; 61G|?Aax
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for(int i=1;;i++) k@7kNMl
{ !!9{U%s
//DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); miPmpu!
//Utility.log(in.readLine()); 8`a,D5U:
sHeader=httpConnection.getHeaderFieldKey(i); YRXK@'[=
if(sHeader!=null) L+Eu
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{ AYt*'Zeg!s
if(sHeader.equals("Content-Length")) #0(fOHPQ
{ : sFo
nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); &ryiG
break; 0"4J"q]&
} 5H~@^!7t
} >;m{{nj
else (:JjQ`i
break; )q^(T1
} 0Qt~K#mr/
} R !9qQn?
catch(IOException e){e.printStackTrace ();} 3zbXAR*
catch(Exception e){e.printStackTrace ();} v C^>p5F
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Utility.log(nFileLength); jBS'g{y-!
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return nFileLength; Bf/|{@
} Rw/Ciw2@?
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//保存下载信息(文件指针位置) pVY4q0@
private void write_nPos() SGQDro=l
{ Jlz9E|*qV
try{ <W?WUF
output = new DataOutputStream(new FileOutputStream(tmpFile)); 7O"hiDQ
output.writeInt(nStartPos.length); ("b*? : B
for(int i=0;i<nStartPos.length;i++) _OLI%o
{ yk`)Cq%=;
// output.writeLong(nPos); s_TD4~
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output.writeLong(fileSplitterFetch.nStartPos); XYMxG:
output.writeLong(fileSplitterFetch.nEndPos); FQ1arUOFW,
} C]M7GHe1q
output.close(); &"xQ~05
} SijS5irfk
catch(IOException e){e.printStackTrace ();} $ND90my
catch(Exception e){e.printStackTrace ();}
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} <;aJ#qT
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//读取保存的下载信息(文件指针位置) .izf#r:<
private void read_nPos() b22LT52
{ pcNSL'u+
try{ db'K!M)
DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); y>)MAzz~\
int nCount = input.readInt(); eJW[ ] !
nStartPos = new long[nCount]; }{A?PHV5
nEndPos = new long[nCount]; j"i#R1T
for(int i=0;i<nStartPos.length;i++) ?@>;/@
{ *CzCUu:%t
nStartPos = input.readLong(); zx7#)*
nEndPos = input.readLong(); xvdY
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} 8sH50jeP
input.close(); B O]=vH
} *O5:
catch(IOException e){e.printStackTrace ();} l!/!?^8|f
catch(Exception e){e.printStackTrace ();} (m/aV
} 4
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private void processErrorCode(int nErrorCode) svqvG7
{ Vli3>K&
System.err.println("Error Code : " + nErrorCode); k},> ^qE
} lYP~3wp99
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//停止文件下载 !D7"=G}HD
public void siteStop() $M39 #a
{ :,47rN,qa
bStop = true; Hk~k@Wft
for(int i=0;i<nStartPos.length;i++) aTG[=)xL
fileSplitterFetch.splitterStop(); _=?2 3
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} V8tghw
} EDtCNqBS~2
//负责部分文件的抓取 v iJJ
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**FileSplitterFetch.java z(rK^RT
*/ h07eEg
package NetFox; l^
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import java.io.*; .$P|^Zx,
import java.net.*; b[yE~EQxr
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public class FileSplitterFetch extends Thread { l=xt;c!
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String sURL; //File URL :PUK6,"5]O
long nStartPos; //File Snippet Start Position 6e<^oH
long nEndPos; //File Snippet End Position Gnk|^i;t
int nThreadID; //Thread's ID Co[n--@C
boolean bDownOver = false; //Downing is over Tt%}4{"
boolean bStop = false; //Stop identical -,|ha>r
FileAccessI fileAccessI = null; //File Access interface -Uri|^t
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public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException Qm; BUG]
{ 7OE[RX8!f
this.sURL = sURL; wA631kr
this.nStartPos = nStart; SOs,)
this.nEndPos = nEnd; rd">JEK;;
nThreadID = id; /K@$#x_{
fileAccessI = new FileAccessI(sName,nStartPos);//定位 .yX>.>"T|
} |AC6sfA+
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public void run() &wb9_?ir-
{ !)nD xM`p
while(nStartPos < nEndPos && !bStop) [Y$V\h=V
{ d/lffNS=
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try{ f1J%]g!
URL url = new URL(sURL); r6MB"4xd
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); <6R"h-u"
httpConnection.setRequestProperty("User-Agent","NetFox"); R1/q3x
String sProperty = "bytes="+nStartPos+"-"; GG+5/hU
httpConnection.setRequestProperty("RANGE",sProperty); xDUaHE1co
Utility.log(sProperty); P5Dk63z]
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InputStream input = httpConnection.getInputStream(); 79wLT\&
//logResponseHead(httpConnection); _ eiF@G
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byte[] b = new byte[1024]; lLMPw}r<
int nRead; #%8 w
while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) g|4w8ry
{ nP;;MX:B
nStartPos += fileAccessI.write(b,0,nRead); "wINBya'M
//if(nThreadID == 1) L+t[&1cW
// Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); S>#R_H<(
} k}U
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Utility.log("Thread " + nThreadID + " is over!"); YZ**;"<G
bDownOver = true; : u-.T.zZl
//nPos = fileAccessI.write (b,0,nRead); )
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} N Bz%(?\
catch(Exception e){e.printStackTrace ();} cix36MR_
} f?maa5S
} (u9Zk~)F
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//打印回应的头信息 B9^R8|V
public void logResponseHead(HttpURLConnection con) jA<T p}$!
{ CV3DMA
for(int i=1;;i++) lhxdx
{ S(w\Z C
String header=con.getHeaderFieldKey(i); !W~<q{VTs
if(header!=null) sOz sY7z3Z
//responseHeaders.put(header,httpConnection.getHeaderField(header)); I7zn>^0}
Utility.log(header+" : "+con.getHeaderField(header)); JiA'BEJN
else 3e
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break; uy9!qk
} ]Uh1l.O
} ="dDA/,$VS
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public void splitterStop() Dft%ip2
{ uw"*zBxl
bStop = true; k!owl+a
} Ia7D F'
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} u(2BQO7
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/* ?(D}5`Nfu
**FileAccess.java agT7=hX].
*//文件访问(定位,写) SQE`
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package NetFox; N"1QX6
import java.io.*;
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public class FileAccessI implements Serializable{ ]! )xr
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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 LS6ry,D"7
RandomAccessFile oSavedFile; 8t[t{"
long nPos; d.cCbr:
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public FileAccessI() throws IOException |^iA6)Q
{ y\z > /q
this("",0); 6#|qg*OS
} >qpqQ;
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public FileAccessI(String sName,long nPos) throws IOException Ay%:@j(E
{ wv^b_DR
oSavedFile = new RandomAccessFile(sName,"rw"); (Oq Hfv
this.nPos = nPos; 4swKjN
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oSavedFile.seek(nPos); afUTAP@
} (Fqa][0
}#
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public synchronized int write(byte[] b,int nStart,int nLen) b{pg!/N4
{ Hg whe=P
int n = -1; jb3.W
try{ Spo+@G
oSavedFile.write(b,nStart,nLen); L|J~9FM
n = nLen; 9wMEvX70
} EneAX&SG
catch(IOException e) q,@+^aZ
{ @\PpA9ebg%
e.printStackTrace (); )Mi'(C;
} `
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return n; blp=Hk
} VVLIeJ(*XT
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} ?K<ZkYw?
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/* QS;F+cmTh
**SiteInfoBean.java B{PLIisc
*/ :~33U)?{T
package NetFox;
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g}r^Xzd;
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