/* xl;0&/7e
**SiteFileFetch.java h5.AM?*TNd
*/ c9)5G+
package NetFox; lM-*{<B
import java.io.*; 2@#`x"0
import java.net.*; _=RK
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public class SiteFileFetch extends Thread { Gmp`3
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SiteInfoBean siteInfoBean = null; //文件信息Bean ,?zOJ,wl
long[] nStartPos; //开始位置 k?'<f
long[] nEndPos; //结束位置 B[nkE+s
FileSplitterFetch[] fileSplitterFetch; //子线程对象 \]+57^8r
long nFileLength; //文件长度 N(BCe\FV
boolean bFirst = true; //是否第一次取文件 `<^1Ik[g
boolean bStop = false; //停止标志 3WQ"3^G
File tmpFile; //文件下载的临时信息 IYk^eG:;
DataOutputStream output; //输出到文件的输出流 K5SP8<.
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//负责整个文件的抓取,控制内部线程(FileSplitterFetch类) Jdp@3mP
public SiteFileFetch(SiteInfoBean bean) throws IOException H{nYZOf/
{ UAq%Y8KA
siteInfoBean = bean; ^NPbD<~Lb
//tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); H.8Vm[W
tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); 58H%#3Fy
if(tmpFile.exists ()) hpOUz%
{ "[BDa}Il
bFirst = false; Kk_h&by?
read_nPos(); }MV=I$S2U
} ' 5%`[&
else &i%1\o
{ ccu13Kr>E
nStartPos = new long[bean.getNSplitter()]; +1j+%&).
nEndPos = new long[bean.getNSplitter()]; njN]0l{p
} /l@h[}g+d-
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public void run() @"E{gM@B
{ 4%L-3Ij
//获得文件长度 ^HasT4M+x
//分割文件 l`A4)8Y@
//实例FileSplitterFetch Lb}
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//启动FileSplitterFetch线程 ,dO$R.h
//等待子线程返回 )mb RG9P
try{ Z2x%
if(bFirst) :u$+lq
{ Qo;#}%}^^
nFileLength = getFileSize(); )Mj
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if(nFileLength == -1) eX@7f!uz
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System.err.println("File Length is not known!");
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} qTl/bFD
else if(nFileLength == -2) r0 6M.r
{ 0{
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System.err.println("File is not access!"); ?dcR!-3
} q"Z!}^{
else WgK |r~
{ :xP$iEA`G
for(int i=0;i<nStartPos.length;i++) w(xRL#%
{ N2x!RYW
nStartPos = (long)(i*(nFileLength/nStartPos.length)); Vt!<.8&`
} e;/C}sK:
for(int i=0;i<nEndPos.length-1;i++) IAJYD/Y&?
{ |rbl sL2?Z
nEndPos = nStartPos[i+1]; ax)j$
} :9Vd=M6,
nEndPos[nEndPos.length-1] = nFileLength; -=A W. Zo
} ;dh8|ujh
} a|v}L,
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//启动子线程 S=wJ{?gzAK
fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; njy^<7;
for(int i=0;i<nStartPos.length;i++) 2iM8V
{ n_Ka+Y<
fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), AIXvS*Y,
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), WZ<kk T
nStartPos,nEndPos,i); OLdD3OI
Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); U8b1
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fileSplitterFetch.start(); -MqWcB9&
} F}lgy;=h
// fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), E(&GZ QE
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); G2,r%|7ta
// Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", Ph&fOj=pFb
nEndPos = " + nFileLength); XI*_ti
// fileSplitterFetch[nPos.length-1].start(); C;jV{sb9c
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//等待子线程结束 /@.c
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//int count = 0; !^|%Z
//是否结束while循环 VnJ-nfA
boolean breakWhile = false; ab=s+[r1
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while(!bStop) ?"aj&,q+
{ iZy`5
write_nPos(); /Lc=
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Utility.sleep(500); 2z\4?HJy
breakWhile = true; Uq,M\V\
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for(int i=0;i<nStartPos.length;i++) IFX|"3[$
{ [wM<J$=2
if(!fileSplitterFetch.bDownOver) m7XJe[O
{ a#0GmK
breakWhile = false; /Jc?;@{
break; yt&eY6Xp
} wnE
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} $<UX/a\sH
if(breakWhile) 1@ j>2>i
break; G=8w9-Ww
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//count++; !k&~|_$0@
//if(count>4) Te8BFcJG
// siteStop(); id-VoHdK
} !j(KbAhWZ
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System.err.println("文件下载结束!"); LC/w".oq?
} ^/W7Xd(s
catch(Exception e){e.printStackTrace ();} hG,gY;&[6
} 2.2Z'$W
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//获得文件长度 j}R4mh
public long getFileSize() !40t:+I
{ I`%=&l[v_5
int nFileLength = -1; wYf=(w\c
try{ ]
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URL url = new URL(siteInfoBean.getSSiteURL()); y0qE::/H$
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); vtFA#})~
httpConnection.setRequestProperty("User-Agent","NetFox"); a{h(BI^~
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int responseCode=httpConnection.getResponseCode(); K]bS:[34 R
if(responseCode>=400) We]X+>BlO
{ ~MY(6P
processErrorCode(responseCode); 13Z6dhZu
return -2; //-2 represent access is error
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} );h\0w>3
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String sHeader; AEwb'
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for(int i=1;;i++) | 4I x2GD
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//DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); ABV\:u
//Utility.log(in.readLine()); ,l<-*yMD
sHeader=httpConnection.getHeaderFieldKey(i); 2vnzB8"k
if(sHeader!=null) FGx_qBG4|
{ dITnPb)i
if(sHeader.equals("Content-Length")) %:o@IRTRU
{ +^+wS`Y
nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); x#0C+cU
break; 2al~`
} x=B+FIJ
} )
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else <nsl`C~6g0
break; p 8"(z@T
} "|DR"rr'j
} 9L#B"lh
catch(IOException e){e.printStackTrace ();} )C2d)(baEJ
catch(Exception e){e.printStackTrace ();} f
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Utility.log(nFileLength); 7IJb$af:;
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return nFileLength; CHpDzG>]4
} sW2LNE
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//保存下载信息(文件指针位置) r-YQsu&
private void write_nPos() Vd<=
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{ [bPE?_a,
try{ J-PzI FWd
output = new DataOutputStream(new FileOutputStream(tmpFile)); <vt^=QA'
output.writeInt(nStartPos.length); )dL?B9d:
for(int i=0;i<nStartPos.length;i++) rF0zGNH
{ ($(1KE
// output.writeLong(nPos); *vAOUqX`x
output.writeLong(fileSplitterFetch.nStartPos); g&0GO:F`
output.writeLong(fileSplitterFetch.nEndPos); 4_.k Q"'DH
} J|FyY)_
output.close(); &<Gq-IN
} 1]>KuXd
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catch(IOException e){e.printStackTrace ();} j|G-9E
catch(Exception e){e.printStackTrace ();} oZCi_g 5i
} g41Lh3dj
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//读取保存的下载信息(文件指针位置) NuO>zAu
private void read_nPos() <uTsXv
{ <Z8] W1)
try{ hTG
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DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); 6vaxp|D
int nCount = input.readInt(); $g$`fR)
nStartPos = new long[nCount]; )ql?}
nEndPos = new long[nCount]; #6H<JB
for(int i=0;i<nStartPos.length;i++) pn $50c
{ J#x91Jh
nStartPos = input.readLong(); w|nVK9.
nEndPos = input.readLong(); EhFhL4Xdn
} 93WYZNpX
input.close(); Ba+OoS
} Fcr@Un'
catch(IOException e){e.printStackTrace ();} fd,~Yj$R?
catch(Exception e){e.printStackTrace ();} oM7^h3R
} l wg.'<
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private void processErrorCode(int nErrorCode) }\0"gM
{ *i?qOv/=>
System.err.println("Error Code : " + nErrorCode); `X^e}EGWu
} YqJIp. Z
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//停止文件下载 xRY5[=97
public void siteStop() 'j)eqoj
{ D1Sl+NOV
bStop = true; E7h}0DX
for(int i=0;i<nStartPos.length;i++) wKeqR$
fileSplitterFetch.splitterStop(); "G,*Z0V5
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} ^r& {V"l]
} ?0(B;[xEJ
//负责部分文件的抓取 cY"^3Ot%^
**FileSplitterFetch.java *tO<wp&
*/ z>0"T2W
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package NetFox; (;j7{(
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import java.io.*; #`fT%'T!
import java.net.*; xqtjtH9X
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public class FileSplitterFetch extends Thread { k`AJ$\=
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String sURL; //File URL j&Aq^aI
long nStartPos; //File Snippet Start Position F:@Ixk?E
long nEndPos; //File Snippet End Position }6bLukv
int nThreadID; //Thread's ID piG1&*
boolean bDownOver = false; //Downing is over Ji!-G4.n"
boolean bStop = false; //Stop identical 1%@~J\qF
FileAccessI fileAccessI = null; //File Access interface Qm.kXlsDI
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public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException |:#mw1
{ E nvs[YZe
this.sURL = sURL; 31*6 ;(
this.nStartPos = nStart;
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this.nEndPos = nEnd; \+uqP:Ty
nThreadID = id; X2uX+}h*tA
fileAccessI = new FileAccessI(sName,nStartPos);//定位
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} EC~t'v
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public void run() LNZ#%R~r
{ ?},ItJ#>)q
while(nStartPos < nEndPos && !bStop) uJOW%|ZN`
{ _5T7A><q<
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try{ Rpk`fxAO
URL url = new URL(sURL); 5G<CDgl^!
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); 4cQ5E9
httpConnection.setRequestProperty("User-Agent","NetFox"); mvgm o
String sProperty = "bytes="+nStartPos+"-"; Flxo%g};
httpConnection.setRequestProperty("RANGE",sProperty); `0^i
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Utility.log(sProperty); Ng"vBycy
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InputStream input = httpConnection.getInputStream(); y2R=%EFh6
//logResponseHead(httpConnection); j1F+,
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byte[] b = new byte[1024]; OD]J@m
int nRead; BB.TrQM.#
while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) a+/|O*>#
{ >y9o&D