/* o9?@jjqH
**SiteFileFetch.java eE;tiX/
*/ -wlj;U
package NetFox; J3Mb]X)_}
import java.io.*; e5=d
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import java.net.*; 9N]Xa
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public class SiteFileFetch extends Thread { #c!:&9oU
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SiteInfoBean siteInfoBean = null; //文件信息Bean E$d3+``
long[] nStartPos; //开始位置 aM^iDJ$>
long[] nEndPos; //结束位置 k#*-<1
FileSplitterFetch[] fileSplitterFetch; //子线程对象 xVvUx,t
long nFileLength; //文件长度 0oe<=L]F
boolean bFirst = true; //是否第一次取文件 .{Y;6]9[
boolean bStop = false; //停止标志 ]wQ!ZG?)
File tmpFile; //文件下载的临时信息 NOz3_k
DataOutputStream output; //输出到文件的输出流 8WP>u8&
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//负责整个文件的抓取,控制内部线程(FileSplitterFetch类) Ur j*V0^
public SiteFileFetch(SiteInfoBean bean) throws IOException C3AWXO ^
{ C2LPLquD+
siteInfoBean = bean; ~PQ.l\C
//tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); NGra/s,9|
tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); ~/:vr
if(tmpFile.exists ()) h@)U,&
{ KuNLu31%
bFirst = false; WSThhI
read_nPos(); +,Dc0VC?
} G#iQX`
else A#uU]S
{ WlL(NrVA@@
nStartPos = new long[bean.getNSplitter()]; l,wlxh$}(
nEndPos = new long[bean.getNSplitter()]; tz1@s nes
} \lL[08G
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} c0Ug5Vr
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public void run() <+8'H:wz
{ 0V%c%]PH
//获得文件长度 6K2e]r
//分割文件 *7Dba5B
//实例FileSplitterFetch B6XO&I1c
//启动FileSplitterFetch线程 tMr7d
//等待子线程返回 &|SWy
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try{ ]A4=/6`g?b
if(bFirst) {+N<
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{ Z:b?^u4.
nFileLength = getFileSize(); EZtU6kW"
if(nFileLength == -1) A`c22Ls]
{ ,"qCz[aDN1
System.err.println("File Length is not known!"); "EW8ll7r
} M,Gy.ivz
else if(nFileLength == -2) :XKYfc_y
{ ~G@NWF?7
System.err.println("File is not access!"); [%IOB/{N
} Da^q9,|
else + a#&W}K
{ ;i{B,!#
for(int i=0;i<nStartPos.length;i++) ,CE/o7.FG
{ x"r0<RK
nStartPos = (long)(i*(nFileLength/nStartPos.length)); u ExLj6
} T+8Yd(:hX
for(int i=0;i<nEndPos.length-1;i++) ,n|si#
{ <y 4(!z"
nEndPos = nStartPos[i+1]; `RTxc
} tZxx#v`
nEndPos[nEndPos.length-1] = nFileLength; -oD,F
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} Bz+oMN#XJ
} G,8mFH
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//启动子线程 (qcFGM22U
fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; 2j\_svw'
for(int i=0;i<nStartPos.length;i++) [V}vd@*k
{ :4AQhn^;"
fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), Fwm$0=BXL
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), z*3b2nV
nStartPos,nEndPos,i); o'Bd. B
Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); 6:1`lsP
fileSplitterFetch.start(); tldT(E6
} [i.@q}c~E
// fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), vrn4yHoZ
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); t]c<HDCK
// Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", YOxgpQ:i
nEndPos = " + nFileLength); cS&KD@.
// fileSplitterFetch[nPos.length-1].start(); O7.V>7Y9H
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//等待子线程结束 EPo)7<|>
//int count = 0; ZbRRDXk!
//是否结束while循环 )1 <0c@g=
boolean breakWhile = false; PW*Vfjf4
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while(!bStop) 'CBwE&AL
{ 3j#VKj+Uc
write_nPos(); H4i}gdR
Utility.sleep(500); N$=YL
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breakWhile = true; ,@Csa#
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for(int i=0;i<nStartPos.length;i++) g%2G=gR$?z
{ cGot0' mB
if(!fileSplitterFetch.bDownOver) s/1r{;q
{ * :"*'
breakWhile = false; YznL+TD
break; _/[qBe
} +|?a7qM
} &BVUK"}P
if(breakWhile) e\)%<G5
break; ui]iOp
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//count++; 6v@Prw@.b
//if(count>4) R P{pEd
// siteStop(); +o+f\!
} K#FD$,c~
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System.err.println("文件下载结束!"); A-x^JC=
} 81RuNs]
catch(Exception e){e.printStackTrace ();} aru2H6
} g5BL"Dn
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//获得文件长度 qw+7.h#V
public long getFileSize() YB*)&@yx
{ 5{H)r
int nFileLength = -1; GtRpgM
try{ +:A `e+\
URL url = new URL(siteInfoBean.getSSiteURL()); 6Dd>ex!-A
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); k_g@4x1y*
httpConnection.setRequestProperty("User-Agent","NetFox"); <?7CwW
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int responseCode=httpConnection.getResponseCode(); mtUiO
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if(responseCode>=400) COi15( G2
{ m?-)SA
processErrorCode(responseCode); w+m7jn!$
return -2; //-2 represent access is error 5N9Cd[4
} `JIp$
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String sHeader; P IG,a~
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for(int i=1;;i++) .)*&NY!nsl
{ $`xpn#lz
//DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); c{'Z.mut
//Utility.log(in.readLine()); \t{iyUxY
sHeader=httpConnection.getHeaderFieldKey(i); Jq1oQu|rs
if(sHeader!=null) 6@aH2+4+
{ CI+)0=`<1B
if(sHeader.equals("Content-Length")) x.t<@y~
{ ;apLMMsWC
nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); g.\b@0Uy'
break; AB
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} Vc\g"1x
} F,YPIl
else Iq|h1ie
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break; HX.K{!5
} Cq@7oi]W0
} %>&~?zrq
catch(IOException e){e.printStackTrace ();} H_g]q
catch(Exception e){e.printStackTrace ();} ImQ-kz?b
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Utility.log(nFileLength); 7Kym|Zg
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return nFileLength; -cUW,>E
} :] Wn26z)
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//保存下载信息(文件指针位置) +sJ{9# 6
private void write_nPos() fe\'N4
{ 8y<mHJ[B
try{ I'D 3~UIf
output = new DataOutputStream(new FileOutputStream(tmpFile)); . (&6gB
output.writeInt(nStartPos.length); +R?E @S
for(int i=0;i<nStartPos.length;i++) Gb2|e.z
{ hz bvR~rn
// output.writeLong(nPos); '3XOU.
output.writeLong(fileSplitterFetch.nStartPos); l[ko)%7V
output.writeLong(fileSplitterFetch.nEndPos); A@M2(?w4
} g=KK
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output.close(); hW~% :v
} ^PdD-tY<
catch(IOException e){e.printStackTrace ();} qY&(O`?m&
catch(Exception e){e.printStackTrace ();} Cpzd k~+H
} tzl,r"k3
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//读取保存的下载信息(文件指针位置) #WA7}tHb
private void read_nPos() Eoz/]b
{ ym
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try{ y**L^uvr
DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); Q3r]T.].h
int nCount = input.readInt(); };2Lrz9<
nStartPos = new long[nCount]; !}A`6z
nEndPos = new long[nCount]; 4PC'7V=S
for(int i=0;i<nStartPos.length;i++) \>T1&JT
{ ]Y
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nStartPos = input.readLong(); z@~ZMk
nEndPos = input.readLong(); 8<Nz34Y
} 0?R$>=u
input.close(); /3+E-|4s
} 0$XrtnM
catch(IOException e){e.printStackTrace ();} 'Q'-7z-6
catch(Exception e){e.printStackTrace ();} yR F+
} `zs@W
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private void processErrorCode(int nErrorCode) yyPj!<.MGP
{ p-C{$5&
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System.err.println("Error Code : " + nErrorCode); IL Nghtm-
} aorL ,l
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//停止文件下载 +=`w
public void siteStop() {3Gj
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{ *~`oA~-Q
bStop = true; : Q,O:
for(int i=0;i<nStartPos.length;i++) Z(E.F,k
fileSplitterFetch.splitterStop(); bz&9]%S<
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} I%?M9y.u6
} 1_~'?'&^
//负责部分文件的抓取 7Aw <:
**FileSplitterFetch.java T~>&m~} +
*/ U:/_T>f%
package NetFox; v@X[0J_8
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import java.io.*; |bRi bB
import java.net.*; ZZL%5{w_
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public class FileSplitterFetch extends Thread { .<P@6Jq
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String sURL; //File URL sx9[#6~{Y
long nStartPos; //File Snippet Start Position (ds*$]
long nEndPos; //File Snippet End Position fQU_A
int nThreadID; //Thread's ID a.<!>o<t:
boolean bDownOver = false; //Downing is over @S012} xH
boolean bStop = false; //Stop identical [o'}R`5)
FileAccessI fileAccessI = null; //File Access interface Qe<c@i"
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public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException wZ8LY;
{ `Q^Vm3h
this.sURL = sURL; k/xNqN(
this.nStartPos = nStart; (w 'k\y
this.nEndPos = nEnd; [s!c c:JR
nThreadID = id; )o_$AbPt
fileAccessI = new FileAccessI(sName,nStartPos);//定位 @0:mP
} }>Lz\.Z/+[
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public void run() g.EKdvY"%H
{ YAF0I%PYU
while(nStartPos < nEndPos && !bStop) qr/N ?,
{ \AR3DDm
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try{ 6? (8KsaN
URL url = new URL(sURL); dZbG#4oO
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); Ks7kaX
httpConnection.setRequestProperty("User-Agent","NetFox"); hWu#}iN
String sProperty = "bytes="+nStartPos+"-"; ?@_,_gTQ
httpConnection.setRequestProperty("RANGE",sProperty); s&OwVQ<M
Utility.log(sProperty); rNHV
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InputStream input = httpConnection.getInputStream(); "Zicac@N
//logResponseHead(httpConnection); I."4u~[
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byte[] b = new byte[1024]; y+[wlo&WC
int nRead; [26([H
while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) 2|^bDg;W+u
{ ].w$b)G
nStartPos += fileAccessI.write(b,0,nRead); }oTac
//if(nThreadID == 1) ~&IL>2-B
// Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); E~!FEl;
} K>$od^f%c
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Utility.log("Thread " + nThreadID + " is over!"); 0:Lm=9o
bDownOver = true; cE=v566
//nPos = fileAccessI.write (b,0,nRead); fx4X!(w!B
} :@X@8j":
catch(Exception e){e.printStackTrace ();} 8eoDE. }
} Vi>kK|\b
} {=d\t<p*n
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//打印回应的头信息 D9&FCCiUE
public void logResponseHead(HttpURLConnection con) aI8K*D )@
{
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for(int i=1;;i++) J_mpI.^Bsf
{ FCmS3KIa,
String header=con.getHeaderFieldKey(i); Om2
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if(header!=null) L7*~8Y
//responseHeaders.put(header,httpConnection.getHeaderField(header)); BT+ws@|[
Utility.log(header+" : "+con.getHeaderField(header)); 'x10\Q65[
else \bb,gRfP
break; !$+J7\&7p
} |3g:q
} m[u
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public void splitterStop() Pz +8u&~p
{ I|$_[Sw
bStop = true; [H)p#x
} nmN6RGx
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} SR S~s
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/* { l LUZM
**FileAccess.java U=%S6uL\bx
*//文件访问(定位,写) fr\UX}o
package NetFox; @,sg^KB
import java.io.*; ?
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public class FileAccessI implements Serializable{ TaB35glLY
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//RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 (N43?iv(
RandomAccessFile oSavedFile; H1=R(+-s
long nPos; uBs[[9je(
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public FileAccessI() throws IOException {{=7 mbc
{ QkzPzbF"
this("",0); `&>!a
} YrgwR
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public FileAccessI(String sName,long nPos) throws IOException diqG8KaK
{ P*(lc:
oSavedFile = new RandomAccessFile(sName,"rw"); W?/7PVGv5h
this.nPos = nPos; K)0 6][,
oSavedFile.seek(nPos); s6). ?oE
} \"PlM!0du
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public synchronized int write(byte[] b,int nStart,int nLen) P5vM y'1X
{ Ef$xum{
int n = -1; -acW[$t
try{
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oSavedFile.write(b,nStart,nLen); r0j:ll d
n = nLen; *RM#F!A
} K |Yr
catch(IOException e) m&|?mTo>m
{ Q.6pmaXrb
e.printStackTrace (); Ctt{j'-[
} 1p9f& w
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return n; F=^vu7rf
} NP^kbF
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} C2eei're
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/* ^X0<ZI
**SiteInfoBean.java lcIX
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