/* $2=-Q/lM
**SiteFileFetch.java A`|OPi)
*/ |0vV?f$
package NetFox; m"P"iK/Av(
import java.io.*; -z]v"gF?Px
import java.net.*; I^pD=1Y]
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public class SiteFileFetch extends Thread { _C3l2v'I$
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SiteInfoBean siteInfoBean = null; //文件信息Bean S&jZYq**
long[] nStartPos; //开始位置 x
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long[] nEndPos; //结束位置 I4kN4*d!N,
FileSplitterFetch[] fileSplitterFetch; //子线程对象 wV- kB4^4
long nFileLength; //文件长度 lPL>8. j
boolean bFirst = true; //是否第一次取文件 6$qn'K$
boolean bStop = false; //停止标志 c0v;r4Jo#j
File tmpFile; //文件下载的临时信息 okx~F9
DataOutputStream output; //输出到文件的输出流 Qo>VN`v
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//负责整个文件的抓取,控制内部线程(FileSplitterFetch类) Z `FqC
public SiteFileFetch(SiteInfoBean bean) throws IOException \hpD
{ ZzA4iT=KO
siteInfoBean = bean; UxZT&x3=)}
//tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); md_9bq/w
tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); 5I,5da
if(tmpFile.exists ()) ;EZ$8|
{ P+!j[X^
bFirst = false; Fj<#*2{]B
read_nPos(); SV;S`\i
} Fw!CssW
else &]gw[
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{ >'3J. FY
nStartPos = new long[bean.getNSplitter()]; "f|\":\
nEndPos = new long[bean.getNSplitter()]; qP<wf=wY
} 3-4' x2
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public void run() s^Lg*t3I
{ vzVXRX
//获得文件长度 f8u m.Xnp6
//分割文件 c`w YQUg(
//实例FileSplitterFetch N:Yjz^Jt
//启动FileSplitterFetch线程 zCxr]md
//等待子线程返回 8 ;oU{
try{ '&{`^l/MH
if(bFirst) Pl4$`Qw#y
{ ..RCR_DIp
nFileLength = getFileSize(); Op^r }7
if(nFileLength == -1) XPnN"Y"y
{ ;`IZ&m$
System.err.println("File Length is not known!"); DDh$n?2fd
} YK Nz[x$|
else if(nFileLength == -2) {Muw4DV
{ dx{ZG'@aH
System.err.println("File is not access!"); A;E7~qOG
} A<esMDX
else N<V,5
{ bgs2~50
for(int i=0;i<nStartPos.length;i++) I9GRSm;0<
{ ajFSbi)l
nStartPos = (long)(i*(nFileLength/nStartPos.length));
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} S EdNH.|I
for(int i=0;i<nEndPos.length-1;i++) o<T_Pjp
{ g:bw;6^u
nEndPos = nStartPos[i+1]; ln}2
} _bp9UJ
nEndPos[nEndPos.length-1] = nFileLength; ,<]X0;~oB
} `* !t<?$i
} S7SD$+fX
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//启动子线程 /8 /2#`3R
fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; z Qtg]@S
for(int i=0;i<nStartPos.length;i++) u'"VbW3u n
{ Z3Le?cMt^
fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), B=K&+
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), !Oj].
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nStartPos,nEndPos,i); G5~ Jp#uA
Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); Z~O1$,Z
fileSplitterFetch.start(); P)he3
} z)$X/v
// fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), }r`m(z$z
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); Ys |n9pW
// Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", Ic_>[E?k
nEndPos = " + nFileLength); 0&!,+
// fileSplitterFetch[nPos.length-1].start(); Ik_u34U
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//等待子线程结束 uzA"+cV5
//int count = 0; (gd+-o4
//是否结束while循环 l_
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boolean breakWhile = false; Ra%" +=
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while(!bStop) R{zAs?j
{ Hk)IV"[R
write_nPos(); md8r"
Utility.sleep(500); `/en&l
breakWhile = true; biZwxP3
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for(int i=0;i<nStartPos.length;i++) FM\yf]'
{ @"[xX}xK;
if(!fileSplitterFetch.bDownOver) yEm[C(gZ
{ L~nVoKY*V
breakWhile = false; *m_B#~4
break; 1&_93
} vMBF7Jfx
} [gK (x%
if(breakWhile) C(( 7
break; ,dhSc<:LT
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//count++; +S!gS|8P
//if(count>4) 6|q\ M
// siteStop(); {Vy2uow0
} &p>VTD
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System.err.println("文件下载结束!"); :q6j{C(
} 3<:(Eda}
catch(Exception e){e.printStackTrace ();} FbxrBM
} eJWcrVpn
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//获得文件长度 ^HpUbZpat)
public long getFileSize() 2)O-EAn
{ JO*}\Es
int nFileLength = -1; S!*wK-
try{ ;|(_;d
URL url = new URL(siteInfoBean.getSSiteURL()); RzPqtN
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); ~j}7Fre
httpConnection.setRequestProperty("User-Agent","NetFox"); ^Fmp"[q
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int responseCode=httpConnection.getResponseCode(); 83rtQ;L
if(responseCode>=400) ["N{6d&Q
{ DI/yHs
processErrorCode(responseCode); U-uBz4Gha
return -2; //-2 represent access is error R $vo
} XE/K|o^Hp
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String sHeader; lPA:aHcj
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for(int i=1;;i++) nJEm&"AI
{ IhIPy~Hgt
//DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); ~N2<-~=si
//Utility.log(in.readLine()); tS1(.CRk
sHeader=httpConnection.getHeaderFieldKey(i); #=>t6B4af
if(sHeader!=null) \\\%pBT7]\
{ @qC](5|TQ
if(sHeader.equals("Content-Length")) *{}Y
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{ {yPJYF_l
nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); Xi^#F;@sU
break; %<4ZU!2L
} HzdtR
} FQc8j:'
else *|Cmm>z"7
break; %XIPPEHU
} !1g2'
} hrLPyV:
catch(IOException e){e.printStackTrace ();} l$j/Ye]
catch(Exception e){e.printStackTrace ();} 3+[R !
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Utility.log(nFileLength); )U>JFgpIW
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return nFileLength; ^U[c:Rz
} ;cye
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//保存下载信息(文件指针位置) hB]\vA7
private void write_nPos() ]!v:xjzT
{ Sdk:-Zuv
try{ F;I % 9-R
output = new DataOutputStream(new FileOutputStream(tmpFile)); _{d0Nm
output.writeInt(nStartPos.length); /hNZ7\|P
for(int i=0;i<nStartPos.length;i++) x)+3SdH
{ _[eAA4h
// output.writeLong(nPos); y":Y$v,P
output.writeLong(fileSplitterFetch.nStartPos); !|SVRaS
output.writeLong(fileSplitterFetch.nEndPos); R~=_,JUW
} @k"Q e&BQ
output.close(); nPAVrDg
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} h3}gg@Fm
catch(IOException e){e.printStackTrace ();} z2EZ0vZ
catch(Exception e){e.printStackTrace ();} ( !K?^si
} b.Yl0Y
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//读取保存的下载信息(文件指针位置) F4Jc7k2
private void read_nPos() n0/H2>I[
{ R]s\s[B
try{ 0`{3|g
DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); qUZm6)p6[a
int nCount = input.readInt(); Y?1
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nStartPos = new long[nCount]; c^4^z"Mo`
nEndPos = new long[nCount]; qHAZ)Tz
for(int i=0;i<nStartPos.length;i++) (wMiXi
{ fV 6$YCf
nStartPos = input.readLong(); R{GT?
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nEndPos = input.readLong(); FEd We\E
} `oDs]90
input.close(); H(MCY3t
} x]1G u
catch(IOException e){e.printStackTrace ();} BdK2I!mm
catch(Exception e){e.printStackTrace ();} $r>\y (W
} MS_@
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private void processErrorCode(int nErrorCode) |=dmxfj@
{ "0,d)L0,"
System.err.println("Error Code : " + nErrorCode); c
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} `|Ll
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//停止文件下载 u-31$z<<5}
public void siteStop() Ps0g
{ j.'Rm%@u
bStop = true; N33{vx
for(int i=0;i<nStartPos.length;i++) sSh=Idrx
fileSplitterFetch.splitterStop(); r`; "
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} T:/68b*H\:
} &_DRrp0CN
//负责部分文件的抓取 ~JU
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**FileSplitterFetch.java l7.W2mg
*/ x[ sSM:
package NetFox; L>,j*a_[
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import java.io.*; z_Nw%V4kr
import java.net.*; f;Iaf#V_
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public class FileSplitterFetch extends Thread { c]pO'6]
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String sURL; //File URL V4('}Q!
long nStartPos; //File Snippet Start Position :sMc}k?9S
long nEndPos; //File Snippet End Position -:5]*zVp+-
int nThreadID; //Thread's ID K3c(c%$<R
boolean bDownOver = false; //Downing is over \Oku<5
boolean bStop = false; //Stop identical :%#(<@ {
FileAccessI fileAccessI = null; //File Access interface @.4e^Km
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public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException NwK(<dzG
{ xJ;DkPh
this.sURL = sURL; WIe2j
this.nStartPos = nStart; GM5s~,
this.nEndPos = nEnd; wbC'SOM
nThreadID = id; [M^ur%H
fileAccessI = new FileAccessI(sName,nStartPos);//定位 w
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} 9Q!X~L|\S
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public void run() \Z +O9T%
{ lS`hJ:
while(nStartPos < nEndPos && !bStop) ;'\{T#5)
{ E&?z-,-o@
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try{ 7VP[U,
URL url = new URL(sURL); Lv;R8^n
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); `.0QY<;
httpConnection.setRequestProperty("User-Agent","NetFox"); t^|+|>S
String sProperty = "bytes="+nStartPos+"-"; c`'2
httpConnection.setRequestProperty("RANGE",sProperty); {y{&tzZ
Utility.log(sProperty); 0FDfB;
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InputStream input = httpConnection.getInputStream(); ODGOWw0
//logResponseHead(httpConnection); Ax#$z
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byte[] b = new byte[1024]; 5"f')MKUV9
int nRead; 1 :xN )M,s
while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) YpFh_Zr[
{ |eEcEu?/b
nStartPos += fileAccessI.write(b,0,nRead); 0NY2Kw;
//if(nThreadID == 1) xh7#\m_U8
// Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); 49o5"M(
} NqsIMCl
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Utility.log("Thread " + nThreadID + " is over!"); 0Ey*ci^ue
bDownOver = true; 8:j8>K*6
//nPos = fileAccessI.write (b,0,nRead); * /S=9n0
} 2
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catch(Exception e){e.printStackTrace ();} ^]He]FW':G
} OzFA>FK0f;
} ~E2xIhV
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//打印回应的头信息 J$)lYSNE
public void logResponseHead(HttpURLConnection con) Qrt[MJ+#
{ 5feCA ,v7
for(int i=1;;i++) -[kbHrl&
{ ,UFr??ZKm
String header=con.getHeaderFieldKey(i); \R>!HY
if(header!=null) ?#F}mOVAa
//responseHeaders.put(header,httpConnection.getHeaderField(header)); )'{:4MX
Utility.log(header+" : "+con.getHeaderField(header)); @u./VK
else +DwyMzeE
break; Z8??+d=
} ^(p}hSLAfQ
} pKrol]cth8
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public void splitterStop() 4Fr0/="H
{ \lVX~r4
bStop = true; |V2+4b,
} x\vb@!BZ
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} X0X!:gX
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/* v*Qr(4
**FileAccess.java SSANt?\Z<
*//文件访问(定位,写) v%|()Z0
package NetFox; 28L3"c
import java.io.*; RHo|&.B;+
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public class FileAccessI implements Serializable{ )1H$5h
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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 /8baJ+D"4\
RandomAccessFile oSavedFile; 36D-J)-Z
long nPos; ;b:Ct <
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