/* c:9n8skE7
**SiteFileFetch.java X
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*/ ZDR@VYi+~
package NetFox; C=r2fc~w
import java.io.*; Em@:QmEN
import java.net.*; rHX^bcYK
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public class SiteFileFetch extends Thread { #m{*]mY@
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SiteInfoBean siteInfoBean = null; //文件信息Bean NBc^(F"
long[] nStartPos; //开始位置 Ws@'2i\;
long[] nEndPos; //结束位置 SNH 3C1
FileSplitterFetch[] fileSplitterFetch; //子线程对象 &EQhk9j
long nFileLength; //文件长度 LtMM89u
boolean bFirst = true; //是否第一次取文件 }\7UU?@ n
boolean bStop = false; //停止标志 ~!r;?38V`
File tmpFile; //文件下载的临时信息 NSB6 2
DataOutputStream output; //输出到文件的输出流 Kh(`6 f
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//负责整个文件的抓取,控制内部线程(FileSplitterFetch类) gaY&2
public SiteFileFetch(SiteInfoBean bean) throws IOException >dt*^}*
{ Ms(xQ[#+
siteInfoBean = bean; gK[;"R)4o@
//tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); tZ9i/ =S
tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); $Xu3s~:S
if(tmpFile.exists ()) Ytlzn%
{ 3$k#bC
bFirst = false; e;6KxvX~
read_nPos(); UDg's
} UlE%\L0GD&
else EaO@I.[
{ DdgiY9a.
nStartPos = new long[bean.getNSplitter()]; 6&eXQl
nEndPos = new long[bean.getNSplitter()]; :V)jm`)#+
} cu0IFNF}[
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} -Qn7+?P
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public void run() {G:y?q'z
{ &oS$<
//获得文件长度 _]>1(8_N
//分割文件 FI$:R
//实例FileSplitterFetch D%YgS$p[M$
//启动FileSplitterFetch线程 MCT1ZZpPr
//等待子线程返回 Fr8GGN~/
try{ }#O!GG{
if(bFirst) oY18a*_>M1
{ mUh]`/MK$
nFileLength = getFileSize(); Mn.,?IF`K
if(nFileLength == -1) cqNK`3:.j
{ c~Ka) dF|
System.err.println("File Length is not known!"); 85GIEUvH/
} pSw/QO9
else if(nFileLength == -2) ~9dpB>+
{ <=q}
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System.err.println("File is not access!"); +J X;T(T
} 5~JT*Ny
else Wp=3heCa6
{ Ic#xz;elM
for(int i=0;i<nStartPos.length;i++) :o'XE|N
{ `
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nStartPos = (long)(i*(nFileLength/nStartPos.length)); DmiBM6t3N
} 9oWU]A\k>
for(int i=0;i<nEndPos.length-1;i++) 9)q3cjP{<
{ 7~/ cz_
nEndPos = nStartPos[i+1]; SAx9cjj+
} yGZsNd {a&
nEndPos[nEndPos.length-1] = nFileLength; {m.$EoS
} u/zBz*zh
} V2YK T,5
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//启动子线程 ff"wg\O4
fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; 5'~_d@M
for(int i=0;i<nStartPos.length;i++) jVj5 ; }
{ J!6FlcsZm
fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), ggr
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), gE-y`2SU
nStartPos,nEndPos,i); `FP?9R6Y
Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); E9HMhUe
fileSplitterFetch.start(); ^mS |ff
} AZtS4]4G)
// fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), XpIiJry!6
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); /:&!o2&1H
// Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", Zp_(vOc
nEndPos = " + nFileLength); hRcb}>pr
// fileSplitterFetch[nPos.length-1].start(); IV QH
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//等待子线程结束 2ej7Ql_@c
//int count = 0; t8Zo9q>
//是否结束while循环 uy'ghF
boolean breakWhile = false; .J"N}
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while(!bStop) "n-'?W!
{ (
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write_nPos(); e%4?-{(
Utility.sleep(500); \INH[X#>
breakWhile = true; 1SQATUV
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for(int i=0;i<nStartPos.length;i++) E-MPFL
{ ));#oQol9
if(!fileSplitterFetch.bDownOver) !,WGd|oJ
{ T)C@6/
breakWhile = false; e_vsiT
break; g|=_@
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} ?HZp@&
} cw;wv+|k
if(breakWhile) -wlj;U
break; 3:%k
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//count++; k_=SDm a
//if(count>4) D-3[#~MV
// siteStop(); x^f<G
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} r;cDYg
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System.err.println("文件下载结束!"); 0r]n
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} ><%585
catch(Exception e){e.printStackTrace ();} +bjy#=
} $o6/dEKQ
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//获得文件长度 We+rFk1ddt
public long getFileSize() ~{c ?-qb
{ l=^A41L_
int nFileLength = -1; O--p)\
try{ BEZ~<E&0H
URL url = new URL(siteInfoBean.getSSiteURL()); A#uU]S
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); 4"@<bKx
httpConnection.setRequestProperty("User-Agent","NetFox"); tz1@s nes
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int responseCode=httpConnection.getResponseCode(); e~h>b.~
if(responseCode>=400) ^df wWP
{ wNONh`b
processErrorCode(responseCode); GqFx^dY4*
return -2; //-2 represent access is error p_r` "
} ];r!
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String sHeader; # @\3{;{R
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for(int i=1;;i++) $+gQnI3w
{ \u=d`}E
//DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); ;i{B,!#
//Utility.log(in.readLine()); vz^ ] g
sHeader=httpConnection.getHeaderFieldKey(i); u ExLj6
if(sHeader!=null) $+eeE
{ <y 4(!z"
if(sHeader.equals("Content-Length")) _S!^=9bJ
{ -oD,F
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nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); U }2@
break; u#05`i:Z
} 0JR/V68$
} ; :e7Z^\/k
else |T#cq!
break; ^0,}y]5p
} PZ[-a-p40
} iUKjCq02
catch(IOException e){e.printStackTrace ();} eSPS3|YYn
catch(Exception e){e.printStackTrace ();} FT).$h~+4
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Utility.log(nFileLength); ITPE2x
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return nFileLength; BD6!,
} x;ik
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//保存下载信息(文件指针位置) N$=YL
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private void write_nPos() o:8ns m
{ r#-
try{ hvt]VC]]
output = new DataOutputStream(new FileOutputStream(tmpFile)); N2h5@*1Y
output.writeInt(nStartPos.length); 0%xk tf
for(int i=0;i<nStartPos.length;i++) e9acI>^w
{ 3mgvWR
// output.writeLong(nPos); Vjs2Yenx
output.writeLong(fileSplitterFetch.nStartPos); Rtf<UhUn
output.writeLong(fileSplitterFetch.nEndPos); 5nPvEN/
} Kq7r+A
output.close(); &-/J~b)"
} %Tp9GGt
catch(IOException e){e.printStackTrace ();} H UJqB0D
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catch(Exception e){e.printStackTrace ();} 6/!:vsa"3
} ueg%yvO
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//读取保存的下载信息(文件指针位置) )St0}?I~
private void read_nPos() gD$&OkH
{ |dIR v
try{ G>~/
DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); l6zAMyau5
int nCount = input.readInt(); besc7!S
nStartPos = new long[nCount]; f:j:L79}
nEndPos = new long[nCount]; ;&lXgC^*
for(int i=0;i<nStartPos.length;i++) Q-) ( s
{
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nStartPos = input.readLong(); 8;M,l2pmR{
nEndPos = input.readLong(); k(f),_
} 6@aH2+4+
input.close(); /{R
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} G-CL \G\n
catch(IOException e){e.printStackTrace ();} =K@LEZZ'/<
catch(Exception e){e.printStackTrace ();} mmQC9nZ
} F,YPIl
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private void processErrorCode(int nErrorCode) azZ|T{S
{ :F d1k
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System.err.println("Error Code : " + nErrorCode); Rd(8j+Q?ps
} n6[shXH
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//停止文件下载 K-YxZAf
public void siteStop() 2?(/$F9X,
{ fe\'N4
bStop = true; -raK
for(int i=0;i<nStartPos.length;i++) xK8m\=#
fileSplitterFetch.splitterStop(); Fpo}UQQbc
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} B^19![v3T
} 6rS
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//负责部分文件的抓取 f$</BND
**FileSplitterFetch.java tzl,r"k3
*/ 6oKlr,.
package NetFox; `-nSH)GBM
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import java.io.*; y**L^uvr
import java.net.*; 7|Vpk&.>
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public class FileSplitterFetch extends Thread { L9[m/(:y
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String sURL; //File URL m:EYOe,w
long nStartPos; //File Snippet Start Position r?`nc6$0|
long nEndPos; //File Snippet End Position r& RJ'z
int nThreadID; //Thread's ID aSm</@tO&
boolean bDownOver = false; //Downing is over YC{7;=Pf
boolean bStop = false; //Stop identical q9zeN:><
FileAccessI fileAccessI = null; //File Access interface u`L*
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public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException E?0RR'
{ Kd#64NSi$A
this.sURL = sURL; ~9fTs4U
this.nStartPos = nStart; cP21x<n
this.nEndPos = nEnd; hHt.No
nThreadID = id; LGy!{c
fileAccessI = new FileAccessI(sName,nStartPos);//定位 ]~WIGl"g
} esTK4z]
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public void run() jaTCRn3|<
{ m[5ed1+
while(nStartPos < nEndPos && !bStop) u<@
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{ @[(%b{TE;
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try{ iow8H' F
URL url = new URL(sURL);
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HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); V[|k:($
httpConnection.setRequestProperty("User-Agent","NetFox"); <>1*1%m
String sProperty = "bytes="+nStartPos+"-"; z:$TW{%M
httpConnection.setRequestProperty("RANGE",sProperty); 4p&SlJ
Utility.log(sProperty); 9e1KH'
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InputStream input = httpConnection.getInputStream(); 64!V8&Ay
//logResponseHead(httpConnection); xeHqC9Ou
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byte[] b = new byte[1024]; > cJX'U9
int nRead; w3IU'(|G
while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) E~!FEl;
{ esEOV$s}
nStartPos += fileAccessI.write(b,0,nRead); >G+?X+9
//if(nThreadID == 1) >7V&pH'
// Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); K31rt-IIt
} 1z(y>`ZBq
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Utility.log("Thread " + nThreadID + " is over!"); BPKeG0F7
bDownOver = true;
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//nPos = fileAccessI.write (b,0,nRead); )Nq$~aAm
} bsmnh_YRj
catch(Exception e){e.printStackTrace ();} M:(k7a+[^
} tL4xHa6v]
} gasl%&
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//打印回应的头信息 akQtre`5sd
public void logResponseHead(HttpURLConnection con) 7[V'3
{ [OsW
for(int i=1;;i++) (#.)~poZ
{ nmN6RGx
String header=con.getHeaderFieldKey(i); z|yC [Ota
if(header!=null) b_=k"d
//responseHeaders.put(header,httpConnection.getHeaderField(header)); S*CRVs
Utility.log(header+" : "+con.getHeaderField(header)); 6i\b&
else fr\UX}o
break; M|`%4vk>
} p<6pmW3
} rC<m6
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public void splitterStop() (F7!&] 8%
{ }EOn=*
bStop = true; D1lHq/
} Hj;j\R >2
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} G#CWl),=
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/* <H E'5b
**FileAccess.java W?R$+~G
*//文件访问(定位,写) R{6.O+j`
package NetFox; )CXJRo`j0
import java.io.*; BbiBtU
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public class FileAccessI implements Serializable{ R_4600
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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 O*yc8fUI
RandomAccessFile oSavedFile; OBN]bvCJ
long nPos; [N#2uo
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public FileAccessI() throws IOException 8 s:sMU:Q
{ lcIX
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