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**SiteFileFetch.java C;70,!3
*/ V)`Q0}
package NetFox; +&_n[;
import java.io.*; _J"J[$
import java.net.*; biffBC:q
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public class SiteFileFetch extends Thread { yFFNzw{
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SiteInfoBean siteInfoBean = null; //文件信息Bean d]=>U^K
long[] nStartPos; //开始位置 #&{)`+!"
long[] nEndPos; //结束位置 X/Fip0i
FileSplitterFetch[] fileSplitterFetch; //子线程对象 ={ 190=\9
long nFileLength; //文件长度 ;lTgihW-
boolean bFirst = true; //是否第一次取文件 <_bGV
boolean bStop = false; //停止标志 =*y{y)B^g
File tmpFile; //文件下载的临时信息 !a5e{QG0
DataOutputStream output; //输出到文件的输出流 9@Z++J.^y
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//负责整个文件的抓取,控制内部线程(FileSplitterFetch类) ;Oqbfl#%
public SiteFileFetch(SiteInfoBean bean) throws IOException 1EV0Y]T1
{ Dp@m"_1`+
siteInfoBean = bean; a5@lWpQsV
//tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); >6;RTN/P2
tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); cetlr
if(tmpFile.exists ()) }LZz"b<aw
{ 0b,{4DOD
bFirst = false; {`L,F
read_nPos(); !:g\Fe]
} 1tpt433
else .N#grk)C
{ .8|5;!`WB
nStartPos = new long[bean.getNSplitter()]; '+S!>Lqb
nEndPos = new long[bean.getNSplitter()]; O,I7M?dRf
} hM(Hq4ed,
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} N9f;X{
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public void run() QO,ge<N+N
{ .7#04_aP
//获得文件长度 UZc{ Av
//分割文件 0j'k%R[l
//实例FileSplitterFetch C9T-4o1
//启动FileSplitterFetch线程 gD6BPW~0
//等待子线程返回 a4!6K
try{ -32.g\]
if(bFirst) +G!;:o
{ )#cGePA
nFileLength = getFileSize(); !P _'n
if(nFileLength == -1) <{1 3Nd'o
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System.err.println("File Length is not known!"); umiD2BRZ
} `&/ zOMp
else if(nFileLength == -2) C1~Ro9si
{ ,rQPs
System.err.println("File is not access!"); MWc{7,
} _~ 7cn
else cFG%Ew@
{ ;\+A6(GX{
for(int i=0;i<nStartPos.length;i++) VoUAFEcs
{ C?b_E
nStartPos = (long)(i*(nFileLength/nStartPos.length)); v*e=oyx[
} LZ~$=<
for(int i=0;i<nEndPos.length-1;i++) }*0*8~Q'5
{ Yr+ghl/ V
nEndPos = nStartPos[i+1]; +wr
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} af7\2g3*
nEndPos[nEndPos.length-1] = nFileLength; ~E7=c3:"
} r+Y]S-o:
} *W<g%j-a
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{
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//启动子线程 8c'E
fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; SbpO<8}8
for(int i=0;i<nStartPos.length;i++) QGd"Z lQ
{ '^M3g-C[Jg
fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), b*qC
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), 5fa_L'L#
nStartPos,nEndPos,i); {R.@EFkZ
Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); *,__\/U98
fileSplitterFetch.start(); ~ +z'pK~c
} eTa[~esu.
// fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), [ 5kaF"
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); ma26|N5
// Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", ag$UNV
nEndPos = " + nFileLength); &+t,fwlM
// fileSplitterFetch[nPos.length-1].start(); F%QVn.
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//等待子线程结束 PfVjfrI[
//int count = 0; )Ikx0vDFQ
//是否结束while循环 ^?tF'l`
boolean breakWhile = false; >U$,/_uMNW
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while(!bStop) "%Eyb\V!
{ /ZKO\q
write_nPos(); u_U51C\rb
Utility.sleep(500); j^Z3
breakWhile = true; $
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for(int i=0;i<nStartPos.length;i++) yf7p0;$?
{ sL tsvH#
if(!fileSplitterFetch.bDownOver) SNd]c
{ SuW_[6]
breakWhile = false; 1)M>vdrP
break; Ye_)~,{,p
} 5ff66CRw
} # 1,(I
if(breakWhile) asI:J/%+2
break; 4o2C=?@(
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//count++; wLC|mByq
//if(count>4) rT
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// siteStop(); u]ZCYJ>
} @cF
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System.err.println("文件下载结束!"); Jj'~\j
} *(x`cf;k
catch(Exception e){e.printStackTrace ();} l+Tw#2s$
} ^@`dsll
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//获得文件长度 RxkcQL/Le
public long getFileSize() c>r0N[
{ @&2bLJJ+
int nFileLength = -1; j=d@Ih*
try{ eW+z@\d9Gz
URL url = new URL(siteInfoBean.getSSiteURL()); ZuF-$]oL&
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); Bf F$
httpConnection.setRequestProperty("User-Agent","NetFox"); F/}PN1#T
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int responseCode=httpConnection.getResponseCode(); PhM3?$
if(responseCode>=400) |k> _
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{ :nw4K(:f
processErrorCode(responseCode); avk0pY(n
return -2; //-2 represent access is error Z%MP:@z
} y)!K@
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String sHeader; 3%xj-7z
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for(int i=1;;i++) (_E<?
{ [HK[{M=v=
//DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); `hL16S
//Utility.log(in.readLine()); xq.,7#3
sHeader=httpConnection.getHeaderFieldKey(i); t8 #&bUX
if(sHeader!=null) y#^d8
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{ +X0?bVT
if(sHeader.equals("Content-Length")) HkEfBQmh
{ 4jj@"*^a
nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); 5B@+$D[0?3
break; .QzHHW4&0
} Z@ *^4Ve
} W[:
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else ~(%nnG6x
break; z6b!,lp
} N%:QaCZKw
} Ylll4w62N
catch(IOException e){e.printStackTrace ();} BYrj#n5
catch(Exception e){e.printStackTrace ();} y}5H<ZcXA
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Utility.log(nFileLength); F%t`dz!L
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return nFileLength; DnP>ed"M!
} a&p|>,WS
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//保存下载信息(文件指针位置) $+)SW{7
private void write_nPos() [F/>pL5U$
{ gEMxK2MNXj
try{ {?17Zth
output = new DataOutputStream(new FileOutputStream(tmpFile)); :03w k)
output.writeInt(nStartPos.length); ^N _kiSr
for(int i=0;i<nStartPos.length;i++) 6+e@)[l.zc
{ dmW0SK
// output.writeLong(nPos); )VID
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output.writeLong(fileSplitterFetch.nStartPos); B_anO{3$4
output.writeLong(fileSplitterFetch.nEndPos); &%}6&PWi
} iZB?5|*
output.close(); S
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} * f=H#
catch(IOException e){e.printStackTrace ();} 1j
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catch(Exception e){e.printStackTrace ();} I1S*=^Z_U
} DDyeNuK
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//读取保存的下载信息(文件指针位置) %:sQ[^0
private void read_nPos() DZ
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{ +dcBh Dq
try{ >fPa>[_1
DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); 9"KEHf!
int nCount = input.readInt(); +ZEj(fd9
nStartPos = new long[nCount]; <T+)~&g$
nEndPos = new long[nCount]; YN#i^(
for(int i=0;i<nStartPos.length;i++) De@GNN"-
{ ,8nu%zcVn
nStartPos = input.readLong(); |?hNl2m
nEndPos = input.readLong(); F$7>q'#
} i<l_z&
input.close(); K2<"O qp_W
} 7,ysixY
catch(IOException e){e.printStackTrace ();} 9^,MC&eb
catch(Exception e){e.printStackTrace ();} V)72]p
} j
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private void processErrorCode(int nErrorCode) t23uQR#>b_
{ D |kdk;Xv
System.err.println("Error Code : " + nErrorCode); EaaQC]/OX5
} 85+'9#~!
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//停止文件下载 -'r4@='6}
public void siteStop() :3J,t//c
{ @9lV~,,U
bStop = true; U,Ya^2h%
for(int i=0;i<nStartPos.length;i++) (pN:ET B
fileSplitterFetch.splitterStop(); O%L]*vIr
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} awkPFA*c'
} >M=_:52.+
//负责部分文件的抓取 3oc p4x`[
**FileSplitterFetch.java E1 IT>_
*/ Ybo:2e
package NetFox; ce@1#}*
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import java.io.*; \!M6-kmi
import java.net.*; r#r L~Rsd}
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public class FileSplitterFetch extends Thread { /k8Lu+OJ
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String sURL; //File URL p5`iq~e9
long nStartPos; //File Snippet Start Position LK\L}<;1V
long nEndPos; //File Snippet End Position yuIy?K
int nThreadID; //Thread's ID Cw6\'p%l-\
boolean bDownOver = false; //Downing is over @oE^(
boolean bStop = false; //Stop identical D1hy:KkAv]
FileAccessI fileAccessI = null; //File Access interface .8Eh[yiln
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public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException ;Z^\$v9?
{ N~H!6N W
this.sURL = sURL; B'}h6ZH
this.nStartPos = nStart; 9U~fc U6
this.nEndPos = nEnd; U )kl!
nThreadID = id; >T84NFdz+
fileAccessI = new FileAccessI(sName,nStartPos);//定位 Nz/PAs7g6
} JBqL0H
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public void run() skr dL.5
{ by07l5
while(nStartPos < nEndPos && !bStop) uCkXzb9_z
{ S7pf
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try{ eX)'C>4W
URL url = new URL(sURL); u}I-#j)wap
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); O-P'Ff"}t
httpConnection.setRequestProperty("User-Agent","NetFox"); Td,2.YMQ
String sProperty = "bytes="+nStartPos+"-"; zF:
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httpConnection.setRequestProperty("RANGE",sProperty); M%&1j >d
Utility.log(sProperty); EzII!0 F
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InputStream input = httpConnection.getInputStream(); mIW8K
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//logResponseHead(httpConnection); 75v7w
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byte[] b = new byte[1024]; gq%U5J"x;J
int nRead; ?D>%+rK8c
while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) `JQw]\f4>
{ i~Q nw-^B
nStartPos += fileAccessI.write(b,0,nRead); UHyGW$B
//if(nThreadID == 1) /{6&99SJcc
// Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); &t)$5\r
} jVlXB6[-
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Utility.log("Thread " + nThreadID + " is over!"); r:{;HM+
bDownOver = true; oYx4+xH/
//nPos = fileAccessI.write (b,0,nRead); ?)NgODU
} [0bp1S~
catch(Exception e){e.printStackTrace ();} ._%8H
} Jb/VITqN4
} @LSfP
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//打印回应的头信息 G*s5GG@Z.
public void logResponseHead(HttpURLConnection con) SI`ems{1>c
{ vVhSl$mW
for(int i=1;;i++) mzO5&h7
{ CwjKz*'[g
String header=con.getHeaderFieldKey(i); i[Qq,MmC
if(header!=null) / jLb{Ky
//responseHeaders.put(header,httpConnection.getHeaderField(header)); ]hMs:$}
Utility.log(header+" : "+con.getHeaderField(header)); xs
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else B_DyH
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break; h
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} xiv8q/
} Vp$<@Y
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public void splitterStop() :(A k:
{ HXm&`
bStop = true; ppuJC'GW
} "]T1DG"
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} ?`=
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/* :W.pD:/=v
**FileAccess.java RH9P$;.7
*//文件访问(定位,写) \E
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package NetFox; $~e55X'!+
import java.io.*; ?
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public class FileAccessI implements Serializable{ &t U&ZH
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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 z? Iu;X
RandomAccessFile oSavedFile; s
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long nPos; qXprD.; }
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