/* 8K@e8p( y
**SiteFileFetch.java :QF`Orb!^
*/ KpIY>k
package NetFox; fm$Qd^E|e
import java.io.*; !^EA}N.u
import java.net.*; Ffd4c
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% .wx]:o
public class SiteFileFetch extends Thread { )LNKJe+
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SiteInfoBean siteInfoBean = null; //文件信息Bean 3BAQ2S}
long[] nStartPos; //开始位置 A8k $.E
long[] nEndPos; //结束位置 k@pEs# a
FileSplitterFetch[] fileSplitterFetch; //子线程对象 t*fH&8(
long nFileLength; //文件长度 3EH@tlTl
boolean bFirst = true; //是否第一次取文件 qW /&.
boolean bStop = false; //停止标志 Nrq/Pkmy
File tmpFile; //文件下载的临时信息 A"0Yn(awWu
DataOutputStream output; //输出到文件的输出流 D~TlG@Pq
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//负责整个文件的抓取,控制内部线程(FileSplitterFetch类) ,Xg^rV~]
public SiteFileFetch(SiteInfoBean bean) throws IOException (,|eE)+
{ Bc`L]<
siteInfoBean = bean; b!`6s
//tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); YDZB$?&a
tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); c[;A$P=
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if(tmpFile.exists ()) xiL+s-
{ 'Hgk$Im+
bFirst = false; /`t}5U>S_
read_nPos(); 0X$2~jV>
} =iB$4d2
else ;Zc0imYL
{ qxcTY|&
nStartPos = new long[bean.getNSplitter()]; k2.\1}\
nEndPos = new long[bean.getNSplitter()]; C>F5=&
} 1(Z+n,Hh
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public void run() /7ShE-.5#
{ F&Rr&m
//获得文件长度 uL:NWgN
//分割文件 e;LC\*dG
//实例FileSplitterFetch vP_mS 4X
//启动FileSplitterFetch线程 Xc&J.Tw#4*
//等待子线程返回 'Tskx
try{ LoSrXK~0~J
if(bFirst) LMN`<R(q]
{ YRv}w3yQ
nFileLength = getFileSize(); QWWI
if(nFileLength == -1) crx%;R
{ |QQ(1#d
System.err.println("File Length is not known!"); rl2(DA{
} Y1F%-o
else if(nFileLength == -2) I|2dV9y
{
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System.err.println("File is not access!"); .bRtK+}F#
} E 0OHl
else jw/@]f;N
{ m63>P4h?
for(int i=0;i<nStartPos.length;i++) ezhfKt]j
{ `=kiqF2P}
nStartPos = (long)(i*(nFileLength/nStartPos.length)); PG@C5Rnu
} 7\H_9o0$
for(int i=0;i<nEndPos.length-1;i++) P,7R/-u 5D
{ uLfk>&hc
nEndPos = nStartPos[i+1]; i?V:+0#q\]
} b/tcD r
nEndPos[nEndPos.length-1] = nFileLength; 0IHAoV60
} \5a;_N[Ed
} @y6^/'
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//启动子线程 mi@uX@ #
fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; iszVM
for(int i=0;i<nStartPos.length;i++) feM(
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fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), bn=7$Ax
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), f:AfM f>m
nStartPos,nEndPos,i); 9niffq)h
Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); tiRi_
fileSplitterFetch.start(); J/rF4=j%xy
} <"S`ZOn
// fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), j9}.U \
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); BFqM6_/J
// Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", H2+V1J=
nEndPos = " + nFileLength); -k%|sqDZj
// fileSplitterFetch[nPos.length-1].start(); _^$F^}{&
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//等待子线程结束 H1
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//int count = 0; f'tQLF[r<
//是否结束while循环 Z}IuR|=
boolean breakWhile = false; +O8}twt@
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while(!bStop) )/z+W[t
{ %wGQu;re
write_nPos(); :>jzL8
Utility.sleep(500); ;0Ih:YY6
breakWhile = true; L9l]0C37e
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for(int i=0;i<nStartPos.length;i++) }{[p<pU$C
{ ++!0r['+>
if(!fileSplitterFetch.bDownOver) sD6vHX%
{ KPZqPtb;
breakWhile = false; ,8DjQz0ZPo
break; "ER=c3 t
} J6nH|s8
} ~!e(e2
if(breakWhile) N0YJ'.=8,
break; awLSY:JI
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//count++; V9;IH<s:
//if(count>4) Vp8!-[R
// siteStop(); _1jeaV9@
} K~qKr<)
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System.err.println("文件下载结束!"); l HZ4N{n
} -(E-yCu
catch(Exception e){e.printStackTrace ();} 1V]j8
} 9 vNz
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//获得文件长度 ZCDXy
public long getFileSize() cejD(!MKe
{ Fl\kt.G
int nFileLength = -1; Ujvk*~:
try{ b\xse2#
URL url = new URL(siteInfoBean.getSSiteURL()); b^<7@tY
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); J& D0,cuk
httpConnection.setRequestProperty("User-Agent","NetFox"); Nu><r
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int responseCode=httpConnection.getResponseCode(); 3\|PwA9fN8
if(responseCode>=400) f/Q/[2t
{ prGp/"E
processErrorCode(responseCode); zKf0 :X
return -2; //-2 represent access is error zH
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} Xs)?PE[
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String sHeader; wNl "y
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for(int i=1;;i++) ,(kaC.Em
{ J^mm"2
//DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); bFfDaO<k
//Utility.log(in.readLine()); D ~NWP%H
sHeader=httpConnection.getHeaderFieldKey(i); K` <`l
if(sHeader!=null) p8z"Jn2P
{ ho6,&Bp8
if(sHeader.equals("Content-Length")) k-$J #
{ c`#4}$
nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); oXGP6#
break; ,"T[#A~
} ^C{?LH/2
} 9}11>X
else 6/|"y
break; ]iaQD _'\
} ,u
} r6e!";w:U
catch(IOException e){e.printStackTrace ();} ZRC7j?ui8`
catch(Exception e){e.printStackTrace ();} 4Gsq)i17j
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Utility.log(nFileLength); "IoY$!Hk
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return nFileLength; ,.,Y{CP
} V V Aw y6
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//保存下载信息(文件指针位置) OJ}aN>k
private void write_nPos() mtNB09E(
{ %?z;'Y7D
try{ L$}'6y/@
output = new DataOutputStream(new FileOutputStream(tmpFile)); oRl@AhS
output.writeInt(nStartPos.length); @Hst-H.l<l
for(int i=0;i<nStartPos.length;i++) +/Vzw
{ C]
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// output.writeLong(nPos); $)7Af6xD
output.writeLong(fileSplitterFetch.nStartPos); 2spK#0n.HV
output.writeLong(fileSplitterFetch.nEndPos); CfHPJ:Qo[
} 'h{DjNSM
output.close(); _B\X&!G.
} V(n3W=#kky
catch(IOException e){e.printStackTrace ();} N{fYO4O
catch(Exception e){e.printStackTrace ();} Y1 6pT
} =L}$#Y8?
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//读取保存的下载信息(文件指针位置) _P{v=`]Eu
private void read_nPos() @%#!-wC-5
{ yx/qp<=
try{ ^4>Icz^ F
DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); b'4r5@GO
int nCount = input.readInt(); Td![Id
nStartPos = new long[nCount]; 'Ie!%k ^
nEndPos = new long[nCount]; -o sxKT:
for(int i=0;i<nStartPos.length;i++) .t{?doOT
{ v5`Odbc=w
nStartPos = input.readLong(); Tq5F'@e
nEndPos = input.readLong(); A;Uw
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} Py#iC#g~
input.close(); IV$2`)[A&X
} X[o"9O|<
catch(IOException e){e.printStackTrace ();} ps=QVX)YP
catch(Exception e){e.printStackTrace ();} g?!;04
} Mer\W6e"e
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private void processErrorCode(int nErrorCode) 2)>Ty4*
{ LY(h>`
System.err.println("Error Code : " + nErrorCode); zy[|4Q(?
} |c!lZo/
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//停止文件下载 pXHeUBY.
public void siteStop() &E8fd/s=k
{ Hxd^oE
bStop = true; 8__C T
for(int i=0;i<nStartPos.length;i++) 4$b9<:M_
fileSplitterFetch.splitterStop(); .@]M'S^1
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}@wXm
} DR#[\RzNI
} ?8)$N
//负责部分文件的抓取 Dv+:d 4|"
**FileSplitterFetch.java `z3"zso
*/ BcD%`vGJ
package NetFox; e\>g@xE%
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import java.io.*; U*em)/9
import java.net.*; Voc&T+A m
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public class FileSplitterFetch extends Thread { ;:pd/\<
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String sURL; //File URL &b&o];a
long nStartPos; //File Snippet Start Position &,@wLy^T
long nEndPos; //File Snippet End Position vR"<:r47?
int nThreadID; //Thread's ID hTbot^/
boolean bDownOver = false; //Downing is over t9
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boolean bStop = false; //Stop identical esQRg~aCGy
FileAccessI fileAccessI = null; //File Access interface _a=f.I
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public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException y7#4Mcc`~
{ a'ODm6#
this.sURL = sURL; I UxsvW+
this.nStartPos = nStart; b(H)8#C
this.nEndPos = nEnd; A'X, zw^}
nThreadID = id; n;Etn!4M
fileAccessI = new FileAccessI(sName,nStartPos);//定位 cZXra(AD
} !4G<&hvb
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public void run() & A<Pf.Us
{ ;F<)BEXC<
while(nStartPos < nEndPos && !bStop) h8_~ OX
{ ' ! ls"qo
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try{ c F(]`49(
URL url = new URL(sURL); JP<Z3
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HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); ~0>{PD$@
httpConnection.setRequestProperty("User-Agent","NetFox"); l?%U*~*
String sProperty = "bytes="+nStartPos+"-"; !Rw\k'<GKX
httpConnection.setRequestProperty("RANGE",sProperty); (&u)FB*
Utility.log(sProperty); m=<;)
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InputStream input = httpConnection.getInputStream(); @*c) s_
//logResponseHead(httpConnection); "ci<W_lx
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byte[] b = new byte[1024]; 5&r2