/*
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**SiteFileFetch.java 0GMb?/
*/ +:A `e+\
package NetFox; 6Dd>ex!-A
import java.io.*; k_g@4x1y*
import java.net.*; <?7CwW
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public class SiteFileFetch extends Thread { mtUiO
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SiteInfoBean siteInfoBean = null; //文件信息Bean w+m7jn!$
long[] nStartPos; //开始位置 5N9Cd[4
long[] nEndPos; //结束位置 `JIp$
FileSplitterFetch[] fileSplitterFetch; //子线程对象 9G6)ja?W
long nFileLength; //文件长度 33`bKKO}
boolean bFirst = true; //是否第一次取文件 P IG,a~
boolean bStop = false; //停止标志 U=v>gNba
File tmpFile; //文件下载的临时信息 >A )Sl'
DataOutputStream output; //输出到文件的输出流 .)*&NY!nsl
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//负责整个文件的抓取,控制内部线程(FileSplitterFetch类) c{'Z.mut
public SiteFileFetch(SiteInfoBean bean) throws IOException 1dD%a91
{ MpKXC
siteInfoBean = bean; cg )(L;
//tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); #m#IBRD :
tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); &UDbH* !4=
if(tmpFile.exists ()) G-CL \G\n
{ D(z#)oDr
bFirst = false; U& GPede
read_nPos(); mmQC9nZ
} S1k*"><
else Q_T,=y
{ m.P
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nStartPos = new long[bean.getNSplitter()]; ]n=z(2Z9lD
nEndPos = new long[bean.getNSplitter()]; ?`TQ!m6y
} o.$48h(
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} J
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public void run() s?<FS@k
{ 58?WO}
//获得文件长度 28JVW3&)
//分割文件 s=$xnc}mf
//实例FileSplitterFetch $%U}k=-
//启动FileSplitterFetch线程 hl[<o<`Q
//等待子线程返回 yXkQ
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try{ /{({f?k<\/
if(bFirst) C,;?`3bH@
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nFileLength = getFileSize(); zGe =l;
if(nFileLength == -1) 9u~C?w
{ L^u|=9
System.err.println("File Length is not known!"); ?23J(;)s
} )^UqB0C6^
else if(nFileLength == -2) dLQp"vs $
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System.err.println("File is not access!"); @3eMvbI
} \;%D;3Au
else =ZHN]PP
{ yI=nu53BV
for(int i=0;i<nStartPos.length;i++) Z4z|B&
{ (9bU\4F\
nStartPos = (long)(i*(nFileLength/nStartPos.length)); 5I* 1CIO
} !:d\A
for(int i=0;i<nEndPos.length-1;i++) #WA7}tHb
{ Eoz/]b
nEndPos = nStartPos[i+1]; ym
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} Bl)D/
nEndPos[nEndPos.length-1] = nFileLength; '>OEQU5-
} )1 @v<I
} $_%
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//启动子线程 3{H!B&sb
fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; jHMP"(]
for(int i=0;i<nStartPos.length;i++) 9[t-W:3c7
{ jKP75jm
fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), w8>lWgN
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), 2!f'l'}
nStartPos,nEndPos,i); q.:a4w J
Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); 0o6r3xc;
fileSplitterFetch.start(); 5Bcmz'?!
} X:FyNUa
// fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), ;J?fK69%
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); ^=I[uX-3ue
// Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", r?`nc6$0|
nEndPos = " + nFileLength); 7|Qb}[s
// fileSplitterFetch[nPos.length-1].start(); v&sp;%I6=
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//等待子线程结束 AzGbvBI&V
//int count = 0; rI)&.5^
//是否结束while循环 hAi'|;g
boolean breakWhile = false; fk#Ggp<
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while(!bStop) (1,4egMpR
{ uxrNkZia
write_nPos(); 4pDZ +}p
Utility.sleep(500); Kd#64NSi$A
breakWhile = true; PHsM)V+
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for(int i=0;i<nStartPos.length;i++) #.j:P#
{ 9 Up>e
if(!fileSplitterFetch.bDownOver) Rlr[uU_
{ Yk4ah$}%-^
breakWhile = false; xoSBMf
break; 6yaWxpW
} p8y<:8I
} )sEAPIka
if(breakWhile) a(U/70j
break; /[3!kW
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//count++; wS2N,X/Y
//if(count>4) u<@
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// siteStop(); V6<Ki
} !OH'pC5
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System.err.println("文件下载结束!"); D@mqfi(x
} t/"9LMKs?
catch(Exception e){e.printStackTrace ();} ,"5p=JX`
} <RkJ7Z^
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//获得文件长度 Zfr?(y+3
public long getFileSize() *
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{ el0W0T
int nFileLength = -1; (7aE!r\Ab
try{ Bq:: 5,v
URL url = new URL(siteInfoBean.getSSiteURL()); 7"_gX
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); =1kjKE !
httpConnection.setRequestProperty("User-Agent","NetFox"); 1n
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int responseCode=httpConnection.getResponseCode(); !91<K{#A{
if(responseCode>=400) ]_)=xF19
{ HPWjNwM
processErrorCode(responseCode); PJcz] <
return -2; //-2 represent access is error #`Et{6WS
} \=g%W^i
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String sHeader; j@s,5:;[
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for(int i=1;;i++) "V_PWEi
{ _bq2h%G=8
//DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); Eh;~y*k\
//Utility.log(in.readLine()); |c>A3 P$=B
sHeader=httpConnection.getHeaderFieldKey(i); )6zwprH!
if(sHeader!=null) HaamLu
{ 65A>p:OO
if(sHeader.equals("Content-Length")) e.g$|C^$m
{ (3G]-
nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); k@R)_,2HH
break; D#9W [6
} KK*"s^L
} w4+bzdZ
else kjW`k?'s
break; IF*kLl?
} hE/y"SP3
} Vi>kK|\b
catch(IOException e){e.printStackTrace ();} $}7WJz:
catch(Exception e){e.printStackTrace ();} KH&xu,I
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Utility.log(nFileLength); l>9ZAI\^
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return nFileLength; f&>Q6 {*]
} B6Tn8@O
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//保存下载信息(文件指针位置) ^Sr`)vP
private void write_nPos() {4{ACp
{ SIRZ_lt$r
try{ >!YI7)
output = new DataOutputStream(new FileOutputStream(tmpFile)); #6JCm!s
output.writeInt(nStartPos.length); N1!|nS3w
for(int i=0;i<nStartPos.length;i++) A]vQ1*pnk
{ 3C8'@-U
// output.writeLong(nPos); Z,,Wo
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output.writeLong(fileSplitterFetch.nStartPos); x2TCw
output.writeLong(fileSplitterFetch.nEndPos); j:,*Liz
} ODM<$Yo:d
output.close(); .,x08M
} z|yC [Ota
catch(IOException e){e.printStackTrace ();} ]Ikj Z=
catch(Exception e){e.printStackTrace ();} !NYc!gYD
} *$_<|
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//读取保存的下载信息(文件指针位置) Da8qR+*x
private void read_nPos() R16"lG
{ T ,gMc
try{ ]?Ru~N}
DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); *pvhkJ g(
int nCount = input.readInt(); }qXi;u))
nStartPos = new long[nCount]; *-Y|qS%
nEndPos = new long[nCount]; BZx#@356N
for(int i=0;i<nStartPos.length;i++) A\.M/)Qo
{ v1zJr6ra9
nStartPos = input.readLong(); (85F1"Jp
nEndPos = input.readLong(); <OW` )0UX
} n4CzReG
input.close(); J(-#(kMyf
} zYj8\iER
catch(IOException e){e.printStackTrace ();} Q_1EAxt
catch(Exception e){e.printStackTrace ();} Vo(d)"m?
} +]|J
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private void processErrorCode(int nErrorCode) w];t ]q|
{ iygdX2
System.err.println("Error Code : " + nErrorCode); 8'#%7+ "=!
} R{6.O+j`
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//停止文件下载 JT<Ia
public void siteStop() >1mCjP
{ o,Ew7~u
bStop = true; XUUS N
for(int i=0;i<nStartPos.length;i++) Khw!+!(H
fileSplitterFetch.splitterStop(); Q:kpaMA1P
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} o~^hsm[44J
} {q8V
//负责部分文件的抓取 n2Ycq&O
**FileSplitterFetch.java XX}RbE#4
*/ >&U]j*'4
package NetFox; n&[U/`o
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import java.io.*; ~"}-cl,
import java.net.*;
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public class FileSplitterFetch extends Thread { xp>ra2A
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