/* Ud(`V:d
**SiteFileFetch.java b[ w;i]2
*/ w=7L3AW
package NetFox; E-2eOT
import java.io.*; KY9n2u&4
import java.net.*; =:I+6PlF@
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public class SiteFileFetch extends Thread { Yl^mAS[w&
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SiteInfoBean siteInfoBean = null; //文件信息Bean Gh(
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long[] nStartPos; //开始位置 t?eH'*>
long[] nEndPos; //结束位置 @%ECj)u`O
FileSplitterFetch[] fileSplitterFetch; //子线程对象 f'Mop= .
long nFileLength; //文件长度 ,_
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boolean bFirst = true; //是否第一次取文件 N_gD>6I
boolean bStop = false; //停止标志 Bi%x`4Lf
File tmpFile; //文件下载的临时信息 1NLg _UBOK
DataOutputStream output; //输出到文件的输出流 `ldz`yu6++
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//负责整个文件的抓取,控制内部线程(FileSplitterFetch类) 2DDsWJ;
public SiteFileFetch(SiteInfoBean bean) throws IOException \?fI t?
{ }
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siteInfoBean = bean; %&<LNEiUN
//tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); (P|pRVO
tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); !nf-}ze{
if(tmpFile.exists ()) t+ Bf#:
{ 8?FueAM'
bFirst = false; GZ #aj|
read_nPos(); ]$iqa"{
} ?h8{xa5b
else 8{
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nStartPos = new long[bean.getNSplitter()]; ]ZoPQUS?
nEndPos = new long[bean.getNSplitter()]; $)~
} ef"?|sn
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} cntco@
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public void run() s][24)99
{ Tny>D0Z#
//获得文件长度 &:#h$`4
//分割文件 =6nD sibf
//实例FileSplitterFetch 5jcte<
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//启动FileSplitterFetch线程 $7Jo8^RE
//等待子线程返回 L@Nu/(pB=
try{ LRb,VD:/Y
if(bFirst) 4_?7&G0(
{ 'fd1Pj9~$
nFileLength = getFileSize(); ib6^x:HGU
if(nFileLength == -1) AONDx3[
{ 2'0K WYM
System.err.println("File Length is not known!"); a:STQk V
} |AZW9
else if(nFileLength == -2) mh/n.*E7
{ 4Ft1@
System.err.println("File is not access!"); Ukz;0q
} V4w=/e_
else Rd*[%)
{ oA-:zz>wL
for(int i=0;i<nStartPos.length;i++) #\rwLpC1u
{ X@2-*so<
nStartPos = (long)(i*(nFileLength/nStartPos.length)); J;Rv ~<7
} Zo-$z8
for(int i=0;i<nEndPos.length-1;i++) },$0&/>ft
{ g{k1&|
nEndPos = nStartPos[i+1]; ]3{0J
} :3h{ A`u
nEndPos[nEndPos.length-1] = nFileLength; v6(E3)J7
} 256LH Y|6
} y2L#:[8
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//启动子线程 m` AK~O2
fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; D=f7NVc >Q
for(int i=0;i<nStartPos.length;i++)
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{ z,SYw &S
fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), Aj>[z8!,
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), }GwVKAjP
nStartPos,nEndPos,i); Ka!I`Yf
Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); I<oL}f
fileSplitterFetch.start(); >`RRP}u=u
} Ut@RGg+f8
// fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), >H][.@LyR
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); \*T"M*;
// Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", OR6ML-|
nEndPos = " + nFileLength); jyS=!ydn+
// fileSplitterFetch[nPos.length-1].start(); fK}h"iH+K
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//等待子线程结束 M)-6T{[IT
//int count = 0; \ gwXH
//是否结束while循环 J97R0
boolean breakWhile = false; &n2e
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while(!bStop) (46 {r}_O
{ :;;E<74e
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write_nPos(); DPgm%Xq9(!
Utility.sleep(500); 6c4&VW
breakWhile = true; 'fV%Z
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for(int i=0;i<nStartPos.length;i++) imB# Eo4eY
{ 5v.DX`"
if(!fileSplitterFetch.bDownOver) <~U4*
{ M5L{*>4|6
breakWhile = false; R{Z-m2La
break; 66&EBX}
} >zvY\{WY
} IV16d
if(breakWhile) RSfM]w}Hq#
break; +ZsX*/TOn
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//count++; g:ErZ;[
//if(count>4) 6SM:x]`##,
// siteStop(); Nt`b;X&
} ;#+0L$<t
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System.err.println("文件下载结束!"); b}9[s
} }l0&a!C
catch(Exception e){e.printStackTrace ();} | $^;wP
} U
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//获得文件长度 5MTgK=c
public long getFileSize() Lm*VN~2
{ CJknJn3m&
int nFileLength = -1; I+
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try{ ^>&k]T`
URL url = new URL(siteInfoBean.getSSiteURL()); `g''rfk}
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); 9<Eg}Ic
httpConnection.setRequestProperty("User-Agent","NetFox"); rZ1Hf11C
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int responseCode=httpConnection.getResponseCode(); ?8@>6IXn
if(responseCode>=400) LE^G&<!
{ FyL_xu\e
processErrorCode(responseCode); -4#2/GXNO
return -2; //-2 represent access is error kYwb -;
} 1$lh"fHU
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String sHeader; )ukpJ z""
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for(int i=1;;i++) ~ A Qp|
{ 3:/'n
//DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); 9%)=`W
//Utility.log(in.readLine()); O09ke-lC
sHeader=httpConnection.getHeaderFieldKey(i); ,1{Ep`
if(sHeader!=null) hqSJ(gs{
{ !/{+WHxIr|
if(sHeader.equals("Content-Length")) C_fY %O
{ V,v[y\
nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); f7de'^t9
break; zzGYiF?
} I8Vb-YeS
} <3X7T6_:@
else Rhzn/\)|
break; T5Eseesp
} iX{G]< n
} 1t[j"CG(o
catch(IOException e){e.printStackTrace ();} :VmHfOO
catch(Exception e){e.printStackTrace ();} {NM+Oj,~'
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Utility.log(nFileLength); 0o&MB
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return nFileLength; 1r)kR@!LNG
} YA(@5CZ
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//保存下载信息(文件指针位置) $3+PbYY
private void write_nPos() m(OvD!
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try{ *~$~yM/~3U
output = new DataOutputStream(new FileOutputStream(tmpFile)); { >{B`e`$
output.writeInt(nStartPos.length); )
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for(int i=0;i<nStartPos.length;i++) _>o-UBb4]T
{ w2(guL($
// output.writeLong(nPos); 6$ Q,Y}j
output.writeLong(fileSplitterFetch.nStartPos); h( QYxI,|
output.writeLong(fileSplitterFetch.nEndPos); 3 *S{;p
} uZKP"Oy
output.close(); ?ne_m:J[
} 2LY=DL7
catch(IOException e){e.printStackTrace ();} R!
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catch(Exception e){e.printStackTrace ();} oSb, :^Wl
} >n5:1.g
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//读取保存的下载信息(文件指针位置) a)-FGP^
private void read_nPos() w>?Un,K
{ _cDF{E+;
try{ u8zbYd3
DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); }}{!u0N},V
int nCount = input.readInt(); 6"j_iB
nStartPos = new long[nCount]; {.e=qQ%P5)
nEndPos = new long[nCount]; :q##fG'm/
for(int i=0;i<nStartPos.length;i++) iP~,n8W
{ *y[PNqyd
nStartPos = input.readLong(); wYsZM/lw
nEndPos = input.readLong(); jMBiaX`F
} t6N*6ld2b
input.close(); 0Rxe~n1o
} em@EDMvI
catch(IOException e){e.printStackTrace ();} XdEPbD-
catch(Exception e){e.printStackTrace ();} Ft{[ae?4
} zRl~^~sY
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private void processErrorCode(int nErrorCode) p 5u_1U0
{ )n7l'}o?+
System.err.println("Error Code : " + nErrorCode); Tn-C>=tR~%
} ]bCq=6ZKR
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//停止文件下载 ]J1S#Q5'
public void siteStop() Hq &"+1F
{ 3Q}$fQ&S
bStop = true; PnT)LqEF
for(int i=0;i<nStartPos.length;i++) `<\}FS`'
fileSplitterFetch.splitterStop(); f}%D"gz
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} <{(/E0~V/<
} pI`?(5iK6|
//负责部分文件的抓取 }H:F< z*
**FileSplitterFetch.java D?jk$^p~m#
*/ UO`;&e-DB
package NetFox; JD>d\z2QC
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import java.io.*; |8_JY2
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import java.net.*; =?0lA_
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public class FileSplitterFetch extends Thread {
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String sURL; //File URL EC&@I+'8Q
long nStartPos; //File Snippet Start Position !H][LXB~H
long nEndPos; //File Snippet End Position YEu1#N
int nThreadID; //Thread's ID 2Tav;LKX
boolean bDownOver = false; //Downing is over Myat{OF
boolean bStop = false; //Stop identical .@ C{3$,VG
FileAccessI fileAccessI = null; //File Access interface ]36sZ
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public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException Q~D`cc|]
{ +eX)48
this.sURL = sURL; @\_x'!R
this.nStartPos = nStart; A?Q a 4i
this.nEndPos = nEnd; _#e&t"@GS
nThreadID = id; FxG7Pk+=
fileAccessI = new FileAccessI(sName,nStartPos);//定位 6~:Sgt nU
} aMARZ)V
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public void run() Dz=k7zRg"
{ fJ*:{48
while(nStartPos < nEndPos && !bStop) h~U02"$
{ \b'xt
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try{ 38V3o`f
URL url = new URL(sURL); /NT[ETMk+
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); 3LR p2(A
httpConnection.setRequestProperty("User-Agent","NetFox"); =!Vf
String sProperty = "bytes="+nStartPos+"-"; 1xNVdI
httpConnection.setRequestProperty("RANGE",sProperty); T`/IO.2
Utility.log(sProperty); M/D)".;
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InputStream input = httpConnection.getInputStream(); k@>\LR/v
//logResponseHead(httpConnection); 1RLY $M
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byte[] b = new byte[1024]; AEmNHO@%q
int nRead; I|oT0y&
while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) &Wp8u#4L
{ A|#`k{+1-
nStartPos += fileAccessI.write(b,0,nRead); 3T\l]? z
//if(nThreadID == 1) JN/UUfj
// Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); :_<_[Y]1
} TG48%L
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Utility.log("Thread " + nThreadID + " is over!"); +@9gkPQQ-@
bDownOver = true; {>3\N0e5
//nPos = fileAccessI.write (b,0,nRead); )'4P.>!!aQ
} v7
catch(Exception e){e.printStackTrace ();} 9L0GLmLk1u
} !9*c8bL D
} snM Z0W
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//打印回应的头信息 [,EpN{l
public void logResponseHead(HttpURLConnection con) }TRAw#h
{ .D,p@4
for(int i=1;;i++) =rA~7+}
{ Th[f9H%
String header=con.getHeaderFieldKey(i); V~DMtB7
if(header!=null) SEwku}
//responseHeaders.put(header,httpConnection.getHeaderField(header)); Kyt)2p
Utility.log(header+" : "+con.getHeaderField(header)); F+ <Z<q
else }uHrto3M
break; {U]H;~3 ?
} oeSN9O
} FLal}80.o:
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public void splitterStop() \?>Hu
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{ 1sE?YJP-
bStop = true; 0<"k8
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} )C(>H93
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} !?f5>Bl
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/* +h^jC9,m~{
**FileAccess.java }<@j'Ok}.
*//文件访问(定位,写) .M,RFC
package NetFox; uY_SU-v
import java.io.*; Mwb/jTp
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public class FileAccessI implements Serializable{ Y^Nuz/
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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 ]A
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RandomAccessFile oSavedFile; 4p%A8%/q
long nPos; )m6M9eC
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public FileAccessI() throws IOException T +5X0 Nv
{ A,su;Qh
this("",0); NC&DF