/* Z$2Vd`XP
**SiteFileFetch.java #PZBh
*/ )ioIn`g^-
package NetFox; fhbILg
import java.io.*; ;ksxz
import java.net.*; 8I%N^G
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public class SiteFileFetch extends Thread { *kKdL
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SiteInfoBean siteInfoBean = null; //文件信息Bean *&vi3#ur
long[] nStartPos; //开始位置 nQM7@"R
long[] nEndPos; //结束位置 un(fr7NW
FileSplitterFetch[] fileSplitterFetch; //子线程对象 q($fl7}Y
long nFileLength; //文件长度 eW zyydl
boolean bFirst = true; //是否第一次取文件 r!HB""w
boolean bStop = false; //停止标志 Uiu9o]n
File tmpFile; //文件下载的临时信息 V SUz+W
DataOutputStream output; //输出到文件的输出流 2~q(?wY
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//负责整个文件的抓取,控制内部线程(FileSplitterFetch类) i*ji
public SiteFileFetch(SiteInfoBean bean) throws IOException Ll'!aar,
{ \'Ewn8Qv8
siteInfoBean = bean; iWMgU:T
//tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); dX;G[\
tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); [Se0+\,&
if(tmpFile.exists ()) 8!VFb+
{ 6 jo+i[h
bFirst = false; u(P;) E"1
read_nPos(); rBovC
} z{dn
else Q5pm^X._j
{ jN^09T49
nStartPos = new long[bean.getNSplitter()]; ~[9(}UM
nEndPos = new long[bean.getNSplitter()]; 70{fl
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} |,OTGZgc
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public void run() c0W4<(
{ dI|`"jl#
//获得文件长度 vV+>JM6<K
//分割文件 'ktWKW$
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//实例FileSplitterFetch O4w:BWVsn
//启动FileSplitterFetch线程 ;
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//等待子线程返回 }^ G&n';J
try{ _HkB+D0v
if(bFirst) }%I)bU
{ 9\[A%jp#K@
nFileLength = getFileSize();
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if(nFileLength == -1) 'P5|[du+
{ =| M[JPr
System.err.println("File Length is not known!");
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} (8/Qt\3jv
else if(nFileLength == -2) -(YdK8
{ aok,qn'j
System.err.println("File is not access!"); JdW:%,sv
} 60St99@O
else Ro oem dCM
{ kVu-,OU
for(int i=0;i<nStartPos.length;i++) Al(u|LbQ
{ :i_kA'dl&
nStartPos = (long)(i*(nFileLength/nStartPos.length)); /o=,\kM
} p$A` qx<M_
for(int i=0;i<nEndPos.length-1;i++) 95CCje{o_
{ smt6).o
nEndPos = nStartPos[i+1]; jboQ)NxT!,
} M=aWL!nJ
nEndPos[nEndPos.length-1] = nFileLength; >J[Wd<~t
} B[rxV
} >o"3:/3
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//启动子线程 OY/sCx+c
fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; L?5OWVX!v
for(int i=0;i<nStartPos.length;i++) X[
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{ "x$RTuWA9
fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), KGI0|Z]n~
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), 7VwLyy
nStartPos,nEndPos,i); P"WnU'+
Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); h.W;Dmf6]
fileSplitterFetch.start(); );.q:"
} ;qF#!Kb5
// fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), (~>L \]!
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); j!H\hj/]
// Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", `y!6(xI
nEndPos = " + nFileLength); _,2P4
// fileSplitterFetch[nPos.length-1].start(); Nl^{w'X0h
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//等待子线程结束 d#9"_{P
//int count = 0; y`EcBf
//是否结束while循环 Gv,0{DVX<
boolean breakWhile = false; ]'UO]i/
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while(!bStop) o(/(`/
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write_nPos(); $I7/FZP
Utility.sleep(500); 3T3p[q4
breakWhile = true; {&Fh$H!
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for(int i=0;i<nStartPos.length;i++) t;@VsQ8
{ Y@S?0
if(!fileSplitterFetch.bDownOver) /WVnyz0
{ |WB<yA1
breakWhile = false; MKdBqnM(F
break; ZN2g(
} X]Emz"
} 3?vasL
if(breakWhile) QJ
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break; <~}t;ji
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//count++; w
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//if(count>4) IA|V^Wmt;
// siteStop(); pX]*&[X?
} {37DrSOa
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System.err.println("文件下载结束!"); OjCT*qyU<
} +SmcZ^\OZ
catch(Exception e){e.printStackTrace ();} byv(:xk|'e
} HlB'yOHv!
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//获得文件长度 Tv0|e'^
public long getFileSize() z+1#p.F$@
{ 'A,&9E{%1
int nFileLength = -1; R.R(|!w>
try{ .e2u)YqA
URL url = new URL(siteInfoBean.getSSiteURL()); ?rQMOJR
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); ,sk;|OAI
httpConnection.setRequestProperty("User-Agent","NetFox"); '?5=j1
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int responseCode=httpConnection.getResponseCode(); 5( lE$&
if(responseCode>=400) 9jiZtwRpk
{ AjaG.fa]k
processErrorCode(responseCode); aI|<t^X
return -2; //-2 represent access is error J!
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} )}?'1ciHI
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String sHeader; 6:B[8otQ
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for(int i=1;;i++) x!q$`zF\\
{ ,SJB3if
//DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); .b vB8VOrW
//Utility.log(in.readLine()); $6:j3ZTXrt
sHeader=httpConnection.getHeaderFieldKey(i); ~fs{Ff'
if(sHeader!=null) f3-=?Z
{ @3[Z QF
if(sHeader.equals("Content-Length")) pCA(>(
{ r]km1SrS
nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); A5Yfm.Jy
break; O!sZMGF$p
} /yIkHb^c
} /Z>#lMg\.
else :9c
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break; Mno4z/4{A
} xrO:Y!C?
} _U$d.B'*)z
catch(IOException e){e.printStackTrace ();} !O)Ruwy
catch(Exception e){e.printStackTrace ();} !$St=!
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Utility.log(nFileLength); D<}KTyG]
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return nFileLength; CIQo2~G
} ZSYXUFz
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//保存下载信息(文件指针位置) suaTXKjyk+
private void write_nPos() S8<O$^L^
{ mN_RB{g{
try{ ]m(Uv8/6
output = new DataOutputStream(new FileOutputStream(tmpFile)); (ui"vLk8PP
output.writeInt(nStartPos.length); Z KnEg2a
for(int i=0;i<nStartPos.length;i++) eUVE8pZl
{ F)lDK.
// output.writeLong(nPos); M'HmVg4'
output.writeLong(fileSplitterFetch.nStartPos); &~G>pvZ
output.writeLong(fileSplitterFetch.nEndPos);
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} G(|ki9^@"9
output.close(); {DBgW},
} .5|wy<
catch(IOException e){e.printStackTrace ();} E@R7b(:*
catch(Exception e){e.printStackTrace ();} HlPf
} N(]6pG=
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//读取保存的下载信息(文件指针位置) +QuaQ% lA
private void read_nPos() P$Xig
{ k%/Z.4vQG
try{ qWtvo';3
DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); 5>"$95D
int nCount = input.readInt(); o{?s\)aBa
nStartPos = new long[nCount]; DK&J"0jz,
nEndPos = new long[nCount]; G*mk 19Z
for(int i=0;i<nStartPos.length;i++) {Aj}s3v
{ !tmY_[\
nStartPos = input.readLong(); QOEcp% 6I}
nEndPos = input.readLong(); x g/3*rL
} 6N :fq
input.close(); `K~300-hOb
} d"Hh9O}6
catch(IOException e){e.printStackTrace ();} Cz+>S3v M
catch(Exception e){e.printStackTrace ();} 7:R8QS9
} 8"LvkN/v^
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private void processErrorCode(int nErrorCode) vEvVT]g[V
{ l^%Ez?-:s
System.err.println("Error Code : " + nErrorCode); &2Q4{i
} tV9nC
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//停止文件下载 :o&qJ%
public void siteStop() GG5wiN*2S
{ {XC# -3O
bStop = true; SQ]&nDd
for(int i=0;i<nStartPos.length;i++) vR3'B3y
fileSplitterFetch.splitterStop(); votv rZ=
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} 7d]}BLpjWz
} :xm,Ok
//负责部分文件的抓取 ga?.7F
**FileSplitterFetch.java ,sn
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*/ BEx?
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package NetFox; dG'aJQw
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import java.io.*; PR|F-/o
import java.net.*; fDNiU"
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public class FileSplitterFetch extends Thread { _)yn6M'Dt
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String sURL; //File URL 7MZBU~,r
long nStartPos; //File Snippet Start Position '0[D-jEr
long nEndPos; //File Snippet End Position E;*#fD~@
int nThreadID; //Thread's ID SHOg,#mV
boolean bDownOver = false; //Downing is over DFQp<Eq]7
boolean bStop = false; //Stop identical y9{KBM%h
FileAccessI fileAccessI = null; //File Access interface ?"N,do
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public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException X&8&NkH
{ oa? bOm
this.sURL = sURL; <xKer<D
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this.nStartPos = nStart; ) kfA5xi[
this.nEndPos = nEnd; WId"2W3M
nThreadID = id; [
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fileAccessI = new FileAccessI(sName,nStartPos);//定位 $d3al%Uo
} GF*8(2h2
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public void run() 0D+[W5TB
{ F"1)y>2k
while(nStartPos < nEndPos && !bStop) P%A;EF~v
{ c3W9"
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try{ ~,WG284
URL url = new URL(sURL); eRKuy l
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); 7xTgG!>v
httpConnection.setRequestProperty("User-Agent","NetFox"); o|YY,G=C
String sProperty = "bytes="+nStartPos+"-"; (/UW}$] h
httpConnection.setRequestProperty("RANGE",sProperty); Hm!ffqO_
Utility.log(sProperty); :hr% 6K7
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InputStream input = httpConnection.getInputStream(); u9ObFm$7
//logResponseHead(httpConnection); 0}C> e`<'
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byte[] b = new byte[1024]; {4J:t_<nKO
int nRead; zP$0B!9
while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) IL;JdIa
{ kU{+@MA;
nStartPos += fileAccessI.write(b,0,nRead); @E;'Ffo
//if(nThreadID == 1) XP'<\
// Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); gBp,p\ Xc
} OJ^kESrm8
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Utility.log("Thread " + nThreadID + " is over!"); Hof@,w
bDownOver = true; meey5}
//nPos = fileAccessI.write (b,0,nRead); r6S-G{o
} XVr>\T4
catch(Exception e){e.printStackTrace ();} QVLv}w`O
} z*n
} Yef=HSzo
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//打印回应的头信息 "Zm**h.t
public void logResponseHead(HttpURLConnection con) & mwQj<Z
{ m}ZkNWH
for(int i=1;;i++) E[q:65xl
{ E-gI'qG\(
String header=con.getHeaderFieldKey(i); {w:*t)@j
if(header!=null) U4)x "s[CP
//responseHeaders.put(header,httpConnection.getHeaderField(header)); :0@R(ct;>
Utility.log(header+" : "+con.getHeaderField(header)); /e5' YVP
else cq:<,Ke
break; zG-pqE6
} fy9mS
} j3>0oe!
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public void splitterStop() [A~n=m5H
{ k{\wjaf)
bStop = true; DwSB(O#X
} DEJ0<pnQr
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} 4SRjF$Bsz
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/* QA|87alh
**FileAccess.java TQ`s&8"P
*//文件访问(定位,写) UU\wP(f
package NetFox; VWhq+8z
import java.io.*; |Y|6`9;
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public class FileAccessI implements Serializable{ =u\W{1
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//RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 p+x}$&<|
RandomAccessFile oSavedFile; 6=N!()s
long nPos; RJ}%pA4I
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public FileAccessI() throws IOException ul(pp+%S
{ 7`xeuK
this("",0); Z4ekBdmCL
} (F=/r]Q
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public FileAccessI(String sName,long nPos) throws IOException ;]gj:6M
{ Dh+<|6mx
oSavedFile = new RandomAccessFile(sName,"rw"); r?9D/|`
this.nPos = nPos; S<*h1}V3/
oSavedFile.seek(nPos); m8}c(GwcP
} J|$UAOEDa
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