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**SiteFileFetch.java E-^(VZ_Xj
*/ k5>UAea_
package NetFox; +8xT}mX
import java.io.*;
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import java.net.*; <b'*GBw$
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public class SiteFileFetch extends Thread { auGK2i
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SiteInfoBean siteInfoBean = null; //文件信息Bean r<kgYU`
long[] nStartPos; //开始位置 *A`ZcO=
long[] nEndPos; //结束位置 UU(Pg{DA6
FileSplitterFetch[] fileSplitterFetch; //子线程对象 db_Qt' >
long nFileLength; //文件长度 }Tk:?U{
boolean bFirst = true; //是否第一次取文件 :YRHO|
boolean bStop = false; //停止标志 NL:dyV}
File tmpFile; //文件下载的临时信息 &*o4~6pQ#
DataOutputStream output; //输出到文件的输出流 ,FP0n
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//负责整个文件的抓取,控制内部线程(FileSplitterFetch类) b5MU$}:
public SiteFileFetch(SiteInfoBean bean) throws IOException N?t*4Y
{ pq]z%\$u
siteInfoBean = bean; W\-`}{B_/
//tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); ]gX8z#*k
tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); 2!LDrvPP
if(tmpFile.exists ()) /$clk=
{ :' 5J[]J
bFirst = false; y=pW+$k
read_nPos(); MB:[: nX
} \^0>h`[
else (xvg.Nby
{ Q_p&~ PNy5
nStartPos = new long[bean.getNSplitter()]; iz;5:
nEndPos = new long[bean.getNSplitter()]; n CwA8AG
} =c 9nC;C
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} p2(ha3PW
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public void run() q_^yma
{ P7T'.|d
//获得文件长度 ,d*1|oUw
//分割文件 A",}Ikh='`
//实例FileSplitterFetch #-Mr3
//启动FileSplitterFetch线程 OLt0Q.{
//等待子线程返回 [(g2u@
try{ -rYb{<;ST
if(bFirst) Uc_}="
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nFileLength = getFileSize(); \:@7)(p\;
if(nFileLength == -1) i`f!) 1
{ G6{'|CV
System.err.println("File Length is not known!"); } D!tB
} wO.d;SK
else if(nFileLength == -2) 7bbFUUUG"
{ HCrQ+r{g
System.err.println("File is not access!"); LUxDP#~7
} CAvi P61T
else Rs{8vV
{ LEjq<t1&
for(int i=0;i<nStartPos.length;i++) uWClT):
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nStartPos = (long)(i*(nFileLength/nStartPos.length)); (!8b$)k
} l'Za"TL:
for(int i=0;i<nEndPos.length-1;i++) jmgkY)rb R
{ "0nsY E
nEndPos = nStartPos[i+1]; AH/^v;-
} GK-P6d
nEndPos[nEndPos.length-1] = nFileLength; hC8WRxEGq
} 8a@k6OZ
} OY(CB(2N
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//启动子线程 6/3E!8
fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; &+(D< U
for(int i=0;i<nStartPos.length;i++) %{IgY{X
{ #"c'eG0
fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), rZ+4kf6S
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), #wT6IU1
nStartPos,nEndPos,i); x&J\ swN9
Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); KwMt@1Z
fileSplitterFetch.start(); Fhllqh)
} y@$E5sz
// fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), l="X|t
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); dHiir&Rd9`
// Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", 4x-,l1NMR
nEndPos = " + nFileLength); GPGPteC
// fileSplitterFetch[nPos.length-1].start(); H-&27?s^
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//等待子线程结束 4Zu1G#(zP
//int count = 0; @i(9k
//是否结束while循环 u59l)8=
boolean breakWhile = false; {R63n
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while(!bStop) 3f^jy(
{ *^g]QQ
write_nPos(); Z2g<"M
Utility.sleep(500); { Mb<onW
breakWhile = true; $X-PjQb1Bb
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for(int i=0;i<nStartPos.length;i++) \reVA$M[
{ tboQn~&4
if(!fileSplitterFetch.bDownOver) XRkUv>Yk
{ q,#s m'S
breakWhile = false; IEm~^D#<=
break; (||qFu9a
} "XV@OjrE
} Q_fgpjEh/t
if(breakWhile) M0C)SU5"
break; _2`b$/)-
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//count++; aj|PyX3P:
//if(count>4) S]%,g%6i
// siteStop(); R!/JZ@au<
} 4P)#\$d:
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System.err.println("文件下载结束!"); Md>C!c
} MUZ]*n&0
catch(Exception e){e.printStackTrace ();} >Ho=L)u
} vf>d{F^rv
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//获得文件长度 #l&*&R~>
public long getFileSize() oI`Mn3N
{ 1; kMbl]
int nFileLength = -1; OW=3t#"7Kp
try{ g8'8"9:xC
URL url = new URL(siteInfoBean.getSSiteURL()); v,Z]Vqk
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); (ot56`,k
httpConnection.setRequestProperty("User-Agent","NetFox"); L.;x=w
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int responseCode=httpConnection.getResponseCode(); 3k>#z%//
if(responseCode>=400) qHe
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{ '^WR5P<8c
processErrorCode(responseCode); (t5y$bc
return -2; //-2 represent access is error 5QXU"kWH
} zb[kRo&a0W
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String sHeader; Bx}"X?%S
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for(int i=1;;i++) _(gkYJ+MK
{ OOIp)=4
//DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); ,Js_d
//Utility.log(in.readLine()); .WN&]yr,
sHeader=httpConnection.getHeaderFieldKey(i); (JdheCq!x
if(sHeader!=null) y_W?7S
{ (DvGA I
if(sHeader.equals("Content-Length")) NRG~ya >
{ "38<14V
nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); 6ZI7V!k
break; gU&+^e >
} M Tl
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} ^)Y3V-@t
else &Q"vXs6Gt
break; N
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} -*w2<DCn
} ("}Hs[
catch(IOException e){e.printStackTrace ();} ^fd*KM
catch(Exception e){e.printStackTrace ();} u&o4?]6
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Utility.log(nFileLength); ?RG;q
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return nFileLength; =&"pG`x
} O{byMV{Ou
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//保存下载信息(文件指针位置) 8R\6hYJ%F
private void write_nPos() x%@M*4:&
{ ~MB)}!S:
try{ $X.F=Kv
output = new DataOutputStream(new FileOutputStream(tmpFile)); ?XyrG1('
output.writeInt(nStartPos.length); %j1 7QD8
for(int i=0;i<nStartPos.length;i++) g]44|9x(W
{ !U(S?:hvW
// output.writeLong(nPos); pcscNUp
output.writeLong(fileSplitterFetch.nStartPos); hB\BFVUSn/
output.writeLong(fileSplitterFetch.nEndPos); d72
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} <T.R%Jys
output.close(); <)O#Y76s
} q\!"FDOl4
catch(IOException e){e.printStackTrace ();} n@bkZ/G
catch(Exception e){e.printStackTrace ();} 3kGg;z6
} Dvz 6 E
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//读取保存的下载信息(文件指针位置) n 78!]O
private void read_nPos() \?e2qu/ C
{ *Z.{1
try{ Fv/{)H<:y
DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); MxGQM>
int nCount = input.readInt(); a>8]+@
nStartPos = new long[nCount]; l1 08.ao
nEndPos = new long[nCount]; r
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for(int i=0;i<nStartPos.length;i++) x?0(K=h,
{ p.4Sgeh#
nStartPos = input.readLong(); $ <[r3
nEndPos = input.readLong(); ;*Y+. ?>a
} 5gx;Bp^_
input.close(); ;VCFDE{K=
} g0/R\
catch(IOException e){e.printStackTrace ();} O7Jp;
catch(Exception e){e.printStackTrace ();} @c8RlW/A
} AoxORPp'
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private void processErrorCode(int nErrorCode) {ByKTx&
{ #|:q"l9
System.err.println("Error Code : " + nErrorCode); #X!seQ7a
} *}(B"FSO
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//停止文件下载 V+0pvgS[
public void siteStop() G6Wa0Z
{ "Gqas bX
bStop = true;
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for(int i=0;i<nStartPos.length;i++) l!j=em@
fileSplitterFetch.splitterStop(); 7I(QTc)*
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} jgpF+V-n$
} V*%><r
//负责部分文件的抓取 B=_5gZ4Y
**FileSplitterFetch.java e*D,2>o
*/ \Z~@/OVc
package NetFox; 4uE/!dT
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import java.io.*; V%M@zd?u.
import java.net.*; Iz#jR2:yn
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public class FileSplitterFetch extends Thread { |w_l~xYV)
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String sURL; //File URL ]nxSVKE4p
long nStartPos; //File Snippet Start Position XK0lv8(
long nEndPos; //File Snippet End Position ?LvxEQ-g
int nThreadID; //Thread's ID <1~_nt~(*
boolean bDownOver = false; //Downing is over /W}"/W9
boolean bStop = false; //Stop identical YB{'L +Wbw
FileAccessI fileAccessI = null; //File Access interface \Q?#^<