/* 66*o2D\Q*G
**SiteFileFetch.java ?MH4<7?"
*/ "x)DE,
package NetFox; f<wgZM
import java.io.*; CkU=0mcY
import java.net.*; [P/gM3*'
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public class SiteFileFetch extends Thread { pQNFH)=nw
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SiteInfoBean siteInfoBean = null; //文件信息Bean eXK`%'
long[] nStartPos; //开始位置 T8-$[
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long[] nEndPos; //结束位置 o3=kF
FileSplitterFetch[] fileSplitterFetch; //子线程对象 u*{ _WL[(
long nFileLength; //文件长度 )^TQedF
boolean bFirst = true; //是否第一次取文件 ,X^_w
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boolean bStop = false; //停止标志 kP$gl|
File tmpFile; //文件下载的临时信息 VaxO L61xE
DataOutputStream output; //输出到文件的输出流 {%{GZ
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//负责整个文件的抓取,控制内部线程(FileSplitterFetch类) rLxX^[Fp3
public SiteFileFetch(SiteInfoBean bean) throws IOException W#j,{&KVn
{ !Yu-a!
siteInfoBean = bean; M;qL)vf
//tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); E,7~kd~y`
tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); ;L2bC3
if(tmpFile.exists ()) $x;h[,y
{ |@.<}/
bFirst = false; )/"7$2Aoy
read_nPos(); Z@!W?Ed
} e6lOmgHn5
else s2~dmZ_B|_
{ .5;LL,S-
nStartPos = new long[bean.getNSplitter()]; a}fClI-u
nEndPos = new long[bean.getNSplitter()]; f)Q]{ cb6
} 4/?}xD|?
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} sdYj'e:N
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public void run() Aq%^>YAp
{ }Xj_Y]T
//获得文件长度 D|j\ nQ
//分割文件 g ypq`F
//实例FileSplitterFetch W'h0Zg
//启动FileSplitterFetch线程 Wx$q:$h@q
//等待子线程返回 Fx5d@WNa>
try{ 1xAFu+
if(bFirst) p''"E$B/(
{ ++DQS9b{
nFileLength = getFileSize(); |qcFmy
if(nFileLength == -1) _/~ ,a
{
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System.err.println("File Length is not known!"); -MU.Hu
} Yc`j
else if(nFileLength == -2) F(9
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{ DnsP7k.8T
System.err.println("File is not access!"); dyiEK)$h
} 8<g#$(a_E
else rn:zKTyhw
{ o 7W Kh=
for(int i=0;i<nStartPos.length;i++) s^YTI\L
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nStartPos = (long)(i*(nFileLength/nStartPos.length)); RE
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} }?]yxa ~
for(int i=0;i<nEndPos.length-1;i++) h^+C)6(58n
{ _b_?9b-)D
nEndPos = nStartPos[i+1]; M'zS7=F!:
} MiH}VfI
nEndPos[nEndPos.length-1] = nFileLength; =lC;^&D-0/
}
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} $dh4T";
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//启动子线程 "WbVCT'i
fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; Kka8cG
for(int i=0;i<nStartPos.length;i++) =v4r M0m,
{ 6Z&u
fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), AwXt @!(
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), /MqXwUbO
nStartPos,nEndPos,i); U M( l%
Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); >*= =wlOB
fileSplitterFetch.start(); qfGtUkSSb
} (#bp`Kih
// fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), E
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siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); }B=qH7u.K
// Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", p2x1xv
nEndPos = " + nFileLength); ,9Z2cgXwJ
// fileSplitterFetch[nPos.length-1].start(); 8wX+ZL:9
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//等待子线程结束 &{zwM |Q@?
//int count = 0; Wm)-zvNY;
//是否结束while循环 jF2[bzY4
boolean breakWhile = false; Zj1ZU[BEcL
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while(!bStop) <mZrR3v'D
{ M'umoZmW0
write_nPos(); %6A-OF
Utility.sleep(500); fW.GNX8
breakWhile = true; ik2-
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for(int i=0;i<nStartPos.length;i++) L\b]k,Ksf
{ -BA"3 S
if(!fileSplitterFetch.bDownOver) 731h
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{ b/sOfQ
breakWhile = false; XogvtK*
break; "xvtqi,R
} x.b; +p}=
} H>? :U]
if(breakWhile) Opv1B2
break; 8 7RHA $?
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//count++;
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//if(count>4) (8CCesy&
// siteStop(); 5<89Af&&K8
} XzT78
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System.err.println("文件下载结束!"); @Q;i.u{V
} /Q?~Q0{)es
catch(Exception e){e.printStackTrace ();} GAv)QZyV$
} dh&W;zs
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//获得文件长度 LGIalf*7
public long getFileSize() Yeqvv
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int nFileLength = -1; oW^k7#<e}
try{ !w q4EV
URL url = new URL(siteInfoBean.getSSiteURL()); .i$,}wtw
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); bE?'C h
httpConnection.setRequestProperty("User-Agent","NetFox"); /xcJo g~F,
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int responseCode=httpConnection.getResponseCode(); T^~)jpkw
if(responseCode>=400) oEJaH
{ B&?fM~J
processErrorCode(responseCode); 7_DG 5nT
return -2; //-2 represent access is error 2B-.}OJ
} )s7bJjT0=X
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String sHeader; 4otl_l(`yv
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for(int i=1;;i++) !\^jt%e&
{ n@
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//DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); +'|{1gB
//Utility.log(in.readLine()); AYcgi
sHeader=httpConnection.getHeaderFieldKey(i); 6B#('gxO
if(sHeader!=null) 1Ao6y.S
{ 8h|M!/&2
if(sHeader.equals("Content-Length")) OkpwhkPL5
{ 7{pIPmJ
nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); !tU'J"Zy
break; JWWYVl VC
} T7{<arL$
} thuRNYv<
else S ZlC4=6c
break; y;nvR6)
} Ry z?v<)h
} ?6f7ld5
catch(IOException e){e.printStackTrace ();} w$j{Hp6m
catch(Exception e){e.printStackTrace ();} D+sQP ymI
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Utility.log(nFileLength); llq*T"7
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return nFileLength; CvK3H\.&;k
} abi[jxCG
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//保存下载信息(文件指针位置) )JhT1j Qc
private void write_nPos() *%\mZ,s"
{ #6=MKpR
try{ ]78!!G[`
output = new DataOutputStream(new FileOutputStream(tmpFile)); cJDd0(tD!
output.writeInt(nStartPos.length); ~~nqU pK?v
for(int i=0;i<nStartPos.length;i++) NvJV</l6A
{ I{ ryD -!
// output.writeLong(nPos); 1u~ MXGF
output.writeLong(fileSplitterFetch.nStartPos); R,t$"bOd
output.writeLong(fileSplitterFetch.nEndPos); @g-G
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} pJBg?D
output.close(); /=)L_
} `G!M>h@
catch(IOException e){e.printStackTrace ();} XF*.Jg]
catch(Exception e){e.printStackTrace ();} c2 A ps
} Gb2L }
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//读取保存的下载信息(文件指针位置) Pbn!KX~F~
private void read_nPos() pKT2^Q}-h
{ M`7y>Ud
try{ 6na^]t~ncm
DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); 8Pmdk1 ~
int nCount = input.readInt(); v.&>Ih/L
nStartPos = new long[nCount]; YoKs:e2/:
nEndPos = new long[nCount]; Xg7|JS!
for(int i=0;i<nStartPos.length;i++) < zOi4v0
{ 65TfFcQ<S
nStartPos = input.readLong(); 7
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nEndPos = input.readLong(); PuL<^aJ
} <a(}kk}
input.close(); H8{ol6wc)6
} Y32 "N[yw
catch(IOException e){e.printStackTrace ();} //f
catch(Exception e){e.printStackTrace ();} u92^(|
} h-#1U3d
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private void processErrorCode(int nErrorCode) x,n,Qlb
{ r'GP$0rr9!
System.err.println("Error Code : " + nErrorCode); ?6^|ZtB
}
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//停止文件下载 )e|=mtp
public void siteStop() 9X$ma/P[
{ Wb}c=hZv
bStop = true; eE
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for(int i=0;i<nStartPos.length;i++) fHRMu:q
fileSplitterFetch.splitterStop(); oU*45B`"
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} 457\&
} c0&Rg#
//负责部分文件的抓取 QX4ai3v
**FileSplitterFetch.java 4JGtI*%5lq
*/ (Qo I<j""
package NetFox; EJ@p-}I!
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import java.io.*; ?iI4x%y
import java.net.*; jRSUp
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public class FileSplitterFetch extends Thread { scLn=
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String sURL; //File URL J_x13EaV0
long nStartPos; //File Snippet Start Position .qMOGbd?
long nEndPos; //File Snippet End Position u!"t!2I
int nThreadID; //Thread's ID ~cTN~<{dq
boolean bDownOver = false; //Downing is over R}^~^#
boolean bStop = false; //Stop identical QnZcBXI8
FileAccessI fileAccessI = null; //File Access interface a,2'+Tlo
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public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException e/0<[s*#Q
{ =R*qP ;#
this.sURL = sURL; ]o cWt3|
this.nStartPos = nStart; P"B0_EuR<T
this.nEndPos = nEnd; }:X*7 n(&
nThreadID = id; ^*P%=>zO
fileAccessI = new FileAccessI(sName,nStartPos);//定位 K+;e4_\
} rM'=_nmi
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public void run() v?KC%
{ ;\f gF@
while(nStartPos < nEndPos && !bStop) S30?VG9U0f
{ U2bjFLd"
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try{ /YZr~|65
URL url = new URL(sURL); -$\+'
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HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); .zi_[
httpConnection.setRequestProperty("User-Agent","NetFox"); "?V0$-DR
String sProperty = "bytes="+nStartPos+"-"; 0aG ni|
httpConnection.setRequestProperty("RANGE",sProperty); Ney/[3 A
Utility.log(sProperty); q@[QjGj@
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InputStream input = httpConnection.getInputStream(); a(l29>
//logResponseHead(httpConnection); ;M)QwF1
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byte[] b = new byte[1024]; 3B84^>U<
int nRead; '.:z&gSqx0
while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) 7pe\M/kl
{ <
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nStartPos += fileAccessI.write(b,0,nRead); "N`[r iq{
//if(nThreadID == 1) wOU_*uY@6'
// Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); jPUwSIP
} }H^+A77v
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Utility.log("Thread " + nThreadID + " is over!"); #d6)#:uss
bDownOver = true; h&KO<>
//nPos = fileAccessI.write (b,0,nRead); 5>[u `
} gEy?s8_,
catch(Exception e){e.printStackTrace ();} N sXHO
} 45@^L's
} >T^;MS
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//打印回应的头信息 hgPa6Kd
public void logResponseHead(HttpURLConnection con) {*G9|#[/@
{ Ayxkv)%:@)
for(int i=1;;i++) b,7k)ND1F
{ T&6l$1J
String header=con.getHeaderFieldKey(i); `dq,>HdW
if(header!=null) k\5c|Wq|g
//responseHeaders.put(header,httpConnection.getHeaderField(header)); >;e~ WF>+K
Utility.log(header+" : "+con.getHeaderField(header)); H#,W5EJzM
else 'jWr<]3
break; *4\:8
} TM%|'^)
}
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public void splitterStop() p`olCp'
{ $V-~Bu-
bStop = true; BC^ :=
} rV ` #[d
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} fK>L!=Q
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/* ,LHn90S
**FileAccess.java \V;F/Zy(
*//文件访问(定位,写) P)Jgs
package NetFox; - YEZ]:"
import java.io.*; ,0M_Bk"
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public class FileAccessI implements Serializable{ g];!&R-
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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 .]8ZwAs=&
RandomAccessFile oSavedFile; Cjn#00
long nPos; qU \w=
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public FileAccessI() throws IOException ?g_3 [Fk
{ {:/#Nc$5
this("",0); j`{?OYD
} $o+j
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public FileAccessI(String sName,long nPos) throws IOException /2&c$9=1
{ )v'WWwXY>
oSavedFile = new RandomAccessFile(sName,"rw"); ahusta
this.nPos = nPos; )*$lp'~7N
oSavedFile.seek(nPos); ^
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} /!0={G
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public synchronized int write(byte[] b,int nStart,int nLen) 3/P1!:g9
{ aS>u,=C
int n = -1; ]_)yIi"
try{ " s,1%Ltt
oSavedFile.write(b,nStart,nLen); x`mG<Yt
n = nLen; l|u>Tb|V
} CT&|QH{
catch(IOException e) Pd8![Z3
{ {B~QQMEow
e.printStackTrace (); 4VHn \
} kXViWOXU^
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return n; Usvl}{L[
} jVi) Efy
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} 5%"V[lDx@
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/* hDDn,uzpd
**SiteInfoBean.java /'SNw?&
*/ }PlRx6r@
package NetFox; 7g^]:3f!
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public class SiteInfoBean { ./Xz}<($8
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private String sSiteURL; //Site's URL g _9C*
private String sFilePath; //Saved File's Path X0HZH?V+
private String sFileName; //Saved File's Name D\v+wp.
private int nSplitter; //Count of Splited Downloading File Z-%\
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public SiteInfoBean() 'ms-*c&
{//nSplitter的缺省值为5 VD*6g%p
//default value of nSplitter is 5 ~12EQacOT
this("","","",5); fgTg7 m
} bL`TySX
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public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) J3V=
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{ tAd%#:K
sSiteURL= sURL; h8q[1"a:
sFilePath = sPath; 5vQHhwO50k
sFileName = sName; au(D66VO
this.nSplitter = nSpiltter; n&4N[Qlv,
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} U+jOTq8 M
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public String getSSiteURL() lN)C2 2
{ F~vuM$+d
return sSiteURL; C[AqFo
} "S]0
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public void setSSiteURL(String value) *KF#'wi
{ ]jQutlg|
sSiteURL = value; .hb:s,0mP
} hh%-(HaLX3
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public String getSFilePath() H2 {+)
{ SHxNr(wJ<Q
return sFilePath; Y] _ruDIW
} H|<[YYk
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public void setSFilePath(String value) ^)S;xb9
{
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sFilePath = value; 2wg5#i
} :r,pqnH_
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public String getSFileName() IPKbMlV#d
{ XEp{VC@=
return sFileName; lv<*7BCp
} ek\ xx
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public void setSFileName(String value) b5I I/Y
{ 7IH@oMvE
sFileName = value; 2#]#sZmk
} l/GGCnO/
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public int getNSplitter() ]@c+]{
{ =[{i{x|Qz
return nSplitter; iN\4gQ!
} LgU_LcoM*
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