/*
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**SiteFileFetch.java O~c\+~5M*
*/ .&rL>A2U
package NetFox; N4u-tlA
import java.io.*; h 6juX'V
import java.net.*; ~y>N JM>1
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public class SiteFileFetch extends Thread { Ja{[T
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SiteInfoBean siteInfoBean = null; //文件信息Bean 7 ;SI=
long[] nStartPos; //开始位置 '5}@#Mi
long[] nEndPos; //结束位置 jd+U+8r
FileSplitterFetch[] fileSplitterFetch; //子线程对象 @QAI 0ZY
long nFileLength; //文件长度 -op(26:W<
boolean bFirst = true; //是否第一次取文件 UgD&tD0fp
boolean bStop = false; //停止标志 RP%7M8V){B
File tmpFile; //文件下载的临时信息 THmmf_w@
DataOutputStream output; //输出到文件的输出流 b$N&sZ
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//负责整个文件的抓取,控制内部线程(FileSplitterFetch类) 9Bi{X_.9
public SiteFileFetch(SiteInfoBean bean) throws IOException ;mSJZYnT
{ ^gY3))2_
siteInfoBean = bean; u%AyW
//tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); b2XUZ5
tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); ,2]a<0m
if(tmpFile.exists ()) Qn`Fq,uvL
{ v|wO qS
bFirst = false; .NT9dX
read_nPos(); -$o4WSd~
} 5?-@}PL!Y
else Z?)=4|
{ CYZ0F5+t
nStartPos = new long[bean.getNSplitter()]; n0opb [ ?
nEndPos = new long[bean.getNSplitter()]; 0l2@3}e
} R_B`dP<"~Y
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} M1J77LfS8
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public void run() o$k9$H>Na
{ CQ:38l\`gd
//获得文件长度 Itv}TK
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//分割文件 vu`,:/|h
//实例FileSplitterFetch siD/`T&
//启动FileSplitterFetch线程 s'=w/os
//等待子线程返回 zA*I=3E(
try{ 3oMhsQz~z
if(bFirst) tlcNGPa
{ 5'S~PQka*
nFileLength = getFileSize(); d< b ,].
if(nFileLength == -1) */y (~O6
{ 4x2,X`pe3
System.err.println("File Length is not known!"); P:fcbfH+
} Q$8K-5U%
else if(nFileLength == -2) hv#|dI=kZR
{ ]OLe&VRix
System.err.println("File is not access!"); YOQ>A*@4
} um*!+Q
else Q=#N4[W'
{ Rv)>xw
for(int i=0;i<nStartPos.length;i++) +|zcjI'=O
{ EJ=ud9
nStartPos = (long)(i*(nFileLength/nStartPos.length)); l1eF&wNC
} zaG1
for(int i=0;i<nEndPos.length-1;i++) Q8^g WBc
{ MhZ\]CAs9
nEndPos = nStartPos[i+1]; d#-'DO{k
} %IK[d#HO
nEndPos[nEndPos.length-1] = nFileLength; Yqb3g(0
} cCO2w2A[*
} ;Miag'7
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//启动子线程 Q<T+t0G\O-
fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; 9;R'Xo=y
for(int i=0;i<nStartPos.length;i++) tWaM+W
{ H,0Io
fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), Xsd+5="{N
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), 1s6L]&B
nStartPos,nEndPos,i); XxLauJP
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Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); uO5y{O2W
fileSplitterFetch.start(); ;-6
} f8S! FGiNc
// fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), 1`)e}p&
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); +{au$v}
// Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", VRD:PVz
nEndPos = " + nFileLength); ]La~Bh6;m
// fileSplitterFetch[nPos.length-1].start(); |:,i
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//等待子线程结束 9qI#vHA
//int count = 0; %JPBD]&M
//是否结束while循环 XB;C~:
boolean breakWhile = false; =H;F{J"
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while(!bStop) fzZ`O{$8
{ !z2 KQ
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write_nPos(); X{ f#kB]w
Utility.sleep(500); xP-\)d-.aN
breakWhile = true; 1fqJtP6
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for(int i=0;i<nStartPos.length;i++) =:_DXGW2H
{ 9y?)Ga
if(!fileSplitterFetch.bDownOver) odhcU5
{ lw=!v%L
breakWhile = false; q#\4/Dt
break; >!WH%J
} Dy|)u1?
} 'f-8P
if(breakWhile) uYCWsw/
break; :N64FR#
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//count++; Y+ !z]S/x
//if(count>4) ";;Nc>-Y
// siteStop(); v@QfxV2
} W9:(P
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System.err.println("文件下载结束!"); vbEO pYCS
} %/w%A:y#&
catch(Exception e){e.printStackTrace ();} Ni>!b6Z`[
} =fK6P6'B
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//获得文件长度 Iad&Z8E
public long getFileSize() 'a G`qPB
{ ]XEUD1N;I
int nFileLength = -1; {ep.So6
try{ X.eocy
URL url = new URL(siteInfoBean.getSSiteURL()); S`pB EM
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); C_;A~iI7
httpConnection.setRequestProperty("User-Agent","NetFox"); szGGw
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int responseCode=httpConnection.getResponseCode(); P(aN6)D
if(responseCode>=400) ;k
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{ @ RP?)*8}&
processErrorCode(responseCode); -+y3~^EYm,
return -2; //-2 represent access is error 22@w:
} AmB*4p5b
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String sHeader; 3jjV
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for(int i=1;;i++) D[dI_|59a
{ [F+*e=wjN>
//DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); Ie(M9QMp
//Utility.log(in.readLine()); cC]lO
sHeader=httpConnection.getHeaderFieldKey(i); Q!{,^Qb
if(sHeader!=null) ?*&5`Xh
{ Yc^,Cj{OM
if(sHeader.equals("Content-Length")) ,c|Ai(U
{ 1*?L>@Wdy
nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); LAY~hF"
break; )yUSuK(Vu
} 95sK ;`rE+
} 3|BB#;
else +NTC!/
break; 6 -BC/
} ^#]eCXv
} MH/bJtNq
catch(IOException e){e.printStackTrace ();} ~uu{
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catch(Exception e){e.printStackTrace ();} pkc*toW
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Utility.log(nFileLength); <OTx79m
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return nFileLength; gwDVWhq
} jD?*sd
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//保存下载信息(文件指针位置) k,61Va
private void write_nPos() 6*:U1{Gl)
{ Pr3>}4M
try{ OlM3G^1e1
output = new DataOutputStream(new FileOutputStream(tmpFile)); p8MN>pLP%
output.writeInt(nStartPos.length); WmuYHE U
for(int i=0;i<nStartPos.length;i++) 4VhKV JX
{ kOQ!]-;
// output.writeLong(nPos); nw0Tg= P
output.writeLong(fileSplitterFetch.nStartPos); V W( +sSQ
output.writeLong(fileSplitterFetch.nEndPos); U% OlYP$g
} 4wPP/`
output.close(); {J-Ojw|Y b
} H^+Znmo
catch(IOException e){e.printStackTrace ();} e17]{6y
catch(Exception e){e.printStackTrace ();} NmTo/5s
} ''}2JJU{
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//读取保存的下载信息(文件指针位置) ;N!opg))d<
private void read_nPos() o,'Fz?[T%
{
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try{ Va^(cnwa
DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); yC7lR#N8j0
int nCount = input.readInt(); lT_dzO
nStartPos = new long[nCount]; .9q`Tf
nEndPos = new long[nCount]; RO| }WD)
for(int i=0;i<nStartPos.length;i++) VBz
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{ Z GrDa
nStartPos = input.readLong(); 6S^JmYq
nEndPos = input.readLong(); :XB^IyO-A
} }$#PIyz
input.close(); H__'K/nH+
} i4mP*RwC
catch(IOException e){e.printStackTrace ();} JtxitF2
catch(Exception e){e.printStackTrace ();} ucFfxar"
} ?@ 7Reh\
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private void processErrorCode(int nErrorCode) 's$/-AV
{ .gY=<bG/fA
System.err.println("Error Code : " + nErrorCode); 2:&L|;
} xXCsJ9]
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//停止文件下载 Gm=e;X;r
public void siteStop() \lK `
{ 0P;\ :-&p
bStop = true; )B"E+Q'h{7
for(int i=0;i<nStartPos.length;i++) 3g5D[>J'
fileSplitterFetch.splitterStop(); h]&o)%{4
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} YwZ]J
} [= Xb*~
//负责部分文件的抓取 IGo+O*dMw
**FileSplitterFetch.java Jt3*(+J>/
*/ uCc5)
package NetFox; &.JJhX
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import java.io.*; oiQ:&$y
import java.net.*; ^(KDtc
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public class FileSplitterFetch extends Thread { = VMELk!z
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String sURL; //File URL b1yS1i
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long nStartPos; //File Snippet Start Position bd[iD?epD]
long nEndPos; //File Snippet End Position x[mh^V5ld
int nThreadID; //Thread's ID -m$2"_
boolean bDownOver = false; //Downing is over .dj}y
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boolean bStop = false; //Stop identical m`n#Q#6
FileAccessI fileAccessI = null; //File Access interface oWq]\yT<`
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public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException ?=b#H6vs
{ )NO,G
this.sURL = sURL; W
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this.nStartPos = nStart; ysFp$!9Ux
this.nEndPos = nEnd; zpg512\y
nThreadID = id; {FR+a**
fileAccessI = new FileAccessI(sName,nStartPos);//定位 9Dd`x7$a
} TWdhl9Ot
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public void run() a\KM^jrCD
{ "g5MltH
while(nStartPos < nEndPos && !bStop) NT{'BJ
{ zKThM#.Wa
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try{ dRUmC H
URL url = new URL(sURL); HahA} Q
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); ={50>WXE
httpConnection.setRequestProperty("User-Agent","NetFox"); P>R u
String sProperty = "bytes="+nStartPos+"-"; [d=BN ,?
httpConnection.setRequestProperty("RANGE",sProperty); |}@teN^J*U
Utility.log(sProperty); q NUd "%S
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InputStream input = httpConnection.getInputStream(); JY%l1:}G3
//logResponseHead(httpConnection); t-Ble
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byte[] b = new byte[1024]; &_' evZ8
int nRead; V!s#xXD }
while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) fC/P W`4Ae
{ F(w<YU%6
nStartPos += fileAccessI.write(b,0,nRead); %&eBkN!T
//if(nThreadID == 1) +No Ve#
// Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); Gz2\&rmN
} QV
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Utility.log("Thread " + nThreadID + " is over!"); **c"}S6:mC
bDownOver = true; dJ~Occ 1~r
//nPos = fileAccessI.write (b,0,nRead); xPJ@!ks9
} WfQZ7e
catch(Exception e){e.printStackTrace ();} U-D00l7C
} K14v6d
} +9M";'\c
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//打印回应的头信息 7?8+h
public void logResponseHead(HttpURLConnection con) Ym2Ac>I4
{ )Jh:~9L%='
for(int i=1;;i++) tO3#kV\,
{ IV%Rph>d
String header=con.getHeaderFieldKey(i); z }Vg4\x&
if(header!=null) C1OiM b(:
//responseHeaders.put(header,httpConnection.getHeaderField(header)); c=re(
Utility.log(header+" : "+con.getHeaderField(header)); 3pyE'9"f6
else 4W=fQx]
break; fIn^a3TV
} NKiWt
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} -X-sykDm
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public void splitterStop() )ib$*dmUP
{ QFFFxaeJg
bStop = true; [4+I1UR`
} #Vy:6O
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} O"wo&5b_
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/* 5+t$4N+P
**FileAccess.java %0'7J@W
*//文件访问(定位,写) {D8yqO A}
package NetFox; sYB2{w
import java.io.*; "oh;?gQ.
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public class FileAccessI implements Serializable{ N l^uA
o* e'D7
//RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 DH)E9HL
RandomAccessFile oSavedFile; (4/W)L$
long nPos; s%G%s,d
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public FileAccessI() throws IOException z}Um$'. =
{ (IIZ vCek
this("",0); &g]s@S|%
} HE0m#
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public FileAccessI(String sName,long nPos) throws IOException csV3mzP
{ %zO>]f&
oSavedFile = new RandomAccessFile(sName,"rw"); [rz5tfMp
this.nPos = nPos; H;#C NB<e
oSavedFile.seek(nPos); AB<%GzW0(
} w"L]?#
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public synchronized int write(byte[] b,int nStart,int nLen) |O;vWn'U2
{ ~.z82m
int n = -1; )"_&CYnd
try{ fr}.#~{5Y
oSavedFile.write(b,nStart,nLen); o
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n = nLen; 2s}G6'xE]P
} MjbgAH-
catch(IOException e) h)s&Nqg1B
{ M^G9t*I
e.printStackTrace (); 9U3 .=J
} <@c@`K
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# hw;aQ
return n; (Dn1Eov
} h<qi[d4X
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+}eK8>2
} c= aZ[
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/* V{X/y N.u
**SiteInfoBean.java =Z..&H5i
*/ x@D>JG
package NetFox; "BIhd*K[~
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public class SiteInfoBean { { T<[-"h
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private String sSiteURL; //Site's URL R_"6E8N
private String sFilePath; //Saved File's Path #}Bv/`t
private String sFileName; //Saved File's Name ;@O8y\@
private int nSplitter; //Count of Splited Downloading File Ml/K~H
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public SiteInfoBean() =F_j})O5
{//nSplitter的缺省值为5 Nw%^Gs<~
//default value of nSplitter is 5 'C @yJf
this("","","",5); %BQ?DTtb7'
} ZA}!Rzo
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public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) 8C*xrg#g:
{ sXYXBX[
sSiteURL= sURL; 5C9
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sFilePath = sPath; z? GtC{L9
sFileName = sName; 99n;%W>
this.nSplitter = nSpiltter; 4 b}'W}
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} [8vqw(2Tm(
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public String getSSiteURL() OaY]}4tI$
{ 3h6,x0AG
return sSiteURL; Equ%6x
} 6=x]20
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public void setSSiteURL(String value) gx2v(1?S
{ D'Uc?2X,&
sSiteURL = value; SCjVzvG$yg
} 2o7o~r
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public String getSFilePath() [=:4^S|M
{ )i:"cyoE
return sFilePath; y,c\'}*H
} ZIc-^&`r=
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public void setSFilePath(String value) RK_z!%(P
{ -$kbj*b##
sFilePath = value; 9h<iw\$'
} ~8'HX*B]z
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public String getSFileName() iphdJZ/f
{ #nKGU"$+
return sFileName; 5U*${
} C*Qx
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public void setSFileName(String value) l a_
{ L>N)[;|
sFileName = value; $GVf;M2*
}
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public int getNSplitter() 1M[|9nWUC
{ YP{mzGdE&