/* x^y'P<ypw
**SiteFileFetch.java 2.l:O2<
*/ 4rLL[??
package NetFox; ]@phF _
import java.io.*; 5yP\I+Fm
import java.net.*; )v.=jup[
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public class SiteFileFetch extends Thread { a6uJYhS~
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SiteInfoBean siteInfoBean = null; //文件信息Bean vkri+:S3
long[] nStartPos; //开始位置 Zcx`SC-0
long[] nEndPos; //结束位置 e]zBf;9J
FileSplitterFetch[] fileSplitterFetch; //子线程对象 C$XU%5qi
long nFileLength; //文件长度 PamO8^!G
boolean bFirst = true; //是否第一次取文件 67Th;h*sh
boolean bStop = false; //停止标志 OWg(#pZk
File tmpFile; //文件下载的临时信息 QC}CRkp
DataOutputStream output; //输出到文件的输出流 'Wmx)0)
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//负责整个文件的抓取,控制内部线程(FileSplitterFetch类) 5Ou`z5S\k
public SiteFileFetch(SiteInfoBean bean) throws IOException woK&q 7Vn
{ RO'7\xvn
siteInfoBean = bean; Al}B34.uh
//tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); Yp^rR }N
tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); +[\FD; >
if(tmpFile.exists ()) a6) BqlJ
{ ]1#e#M]#
bFirst = false; Yfzl%wc
read_nPos(); ~E2KZm
} lww!-(<ww
else Ng~FEl
{ 7%x[q}
nStartPos = new long[bean.getNSplitter()]; ',JinE95
nEndPos = new long[bean.getNSplitter()]; Ws|j#X<
} m8d!<
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} f'EuY17w
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public void run() Z8K?
{ 42$VhdG
//获得文件长度 Ch<[l8;K
//分割文件 "&G/T ?4
//实例FileSplitterFetch Ku5\]
//启动FileSplitterFetch线程
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//等待子线程返回 #P0&ewy
try{ nxnv,AZG
if(bFirst) W{6|tx)
{ Y5- F@(
nFileLength = getFileSize(); $5aV:Z3P
if(nFileLength == -1) z[L8$7L
{ !Prg_6
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System.err.println("File Length is not known!"); v$?+MNks
} |
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else if(nFileLength == -2) "n(hfz0y%
{ >UiYL}'br6
System.err.println("File is not access!"); ^
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} rWa2pO
else !Qu"BF
{ 9PXFRxGA
for(int i=0;i<nStartPos.length;i++) -#u=\8
{ %)zodf
nStartPos = (long)(i*(nFileLength/nStartPos.length)); r!_-"~`7E
} Ug>~Rq]
for(int i=0;i<nEndPos.length-1;i++) `ZYoA
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{ u8&Z!p\
nEndPos = nStartPos[i+1]; saBVgSd
} +hg3I8q:
nEndPos[nEndPos.length-1] = nFileLength; . qO@Q =
} 2_HNhW
} qkDI](4
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//启动子线程 O_oPh] x)
fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; `u3EU*~W
for(int i=0;i<nStartPos.length;i++) BC&S> #\
{ N{9v1`B
fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), *2pt%eav
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), Gp?a(-K5
nStartPos,nEndPos,i); [B\h$IcRv
Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); o=1Uh,S3R
fileSplitterFetch.start(); B+P(M!m3
} 4gI/!,J(b
// fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), jS]ru-5.
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); p& y<I6a,
// Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", AYqX|
nEndPos = " + nFileLength); ey7 f9
// fileSplitterFetch[nPos.length-1].start(); +h|`/ &,
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//等待子线程结束 P+@/O
//int count = 0; 0L2 F[TN
//是否结束while循环 DR5\45v
boolean breakWhile = false; sBj(Qd
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while(!bStop) 'f!8DGix
{ Pr':51(
write_nPos(); Q{s H3Y#l
Utility.sleep(500); #xsE3Wj-X
breakWhile = true; wN_Vfb
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for(int i=0;i<nStartPos.length;i++) EH+"~-v)ae
{ gX@HO|.t
if(!fileSplitterFetch.bDownOver) >?2M
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{ h5*JkRm
breakWhile = false; 1gL2ia
break; b|l:fT?&
} j/323Za+
} `uv2H$
if(breakWhile) W#9BNKL
break; tU }h~&M
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//count++; Si2k"<5U
//if(count>4) @>r._~
// siteStop(); 7OcWC-<
} q<xCb%#Jl
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System.err.println("文件下载结束!"); YqhAZp<
} 'nzg6^I7g
catch(Exception e){e.printStackTrace ();} >N^Jj:~l
} $Xv* ,Bq
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//获得文件长度 bn|I>e
public long getFileSize() F&4rO\aC"/
{ L*Tj^q!t+
int nFileLength = -1; 27eooY1
try{ Ci@o|Y }tP
URL url = new URL(siteInfoBean.getSSiteURL()); MK%9:wZ
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); "@e3EX7h
httpConnection.setRequestProperty("User-Agent","NetFox"); =_.l8IYX$%
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int responseCode=httpConnection.getResponseCode(); J{.{f
if(responseCode>=400) 0.`/X66;V
{ so,t
processErrorCode(responseCode); NO*u9YH?
return -2; //-2 represent access is error @6Y?\Wx$w
} v [wb~uw\
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String sHeader; +SP{hHa^
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for(int i=1;;i++) ep!Rf:
{ H[6:_**?o
//DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); ]~Rho_mq#
//Utility.log(in.readLine()); JrJo|0Q
sHeader=httpConnection.getHeaderFieldKey(i); kKaE=H-x
if(sHeader!=null) Vh'P&W?[
{ F%@A6'c
if(sHeader.equals("Content-Length")) E-T)*`e
{ EuZ<quwWg
nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); iw3FA4{(
break; >nJ\BPx
} F~,Mw8
} &Qf/>@ l}
else A=$04<nP8!
break; W>${zVu
} %^?fMeI|Y
} Y@;CF
catch(IOException e){e.printStackTrace ();} &C`Gg<
catch(Exception e){e.printStackTrace ();} E(*0jAvO[z
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Utility.log(nFileLength); U\g/ 2dM
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return nFileLength; C'>|J9~Gz
} ()Y~Q(5ji
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//保存下载信息(文件指针位置) e),q0%5
private void write_nPos() ahJ`T*)HY
{ J9\Cm!H
try{ 2]z8:a
output = new DataOutputStream(new FileOutputStream(tmpFile)); X2#2C/6#u
output.writeInt(nStartPos.length); ,1y@Z 5wy
for(int i=0;i<nStartPos.length;i++) {kA0z2Fe
{ Yk'XGr)
// output.writeLong(nPos); y`L>wq,KU
output.writeLong(fileSplitterFetch.nStartPos); 8EZ$g<}
output.writeLong(fileSplitterFetch.nEndPos);
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} Xe3U`P7(
output.close(); R4[N:~Z$|
}
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catch(IOException e){e.printStackTrace ();} S(k3 `;K
catch(Exception e){e.printStackTrace ();} ^%d\qd`
} OC_+("N
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//读取保存的下载信息(文件指针位置) %41m~Wh2
private void read_nPos() Me r/G2#&
{ $[Sc0dzJ
try{ +cJL7=V&
DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); 8+~
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int nCount = input.readInt(); wy<\Tg^J
nStartPos = new long[nCount]; b(,M1.[qt
nEndPos = new long[nCount]; zN[hkmh
for(int i=0;i<nStartPos.length;i++) LGq'WU31:)
{ DF&(8NoX~
nStartPos = input.readLong(); oK9( /v
nEndPos = input.readLong(); >
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} Z-$[\le
input.close(); TYy?KG>:'
} eVEV}`X
catch(IOException e){e.printStackTrace ();} 4n#M
catch(Exception e){e.printStackTrace ();} 3$9s\<j
} O\
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private void processErrorCode(int nErrorCode) >1.X*gi?-
{ dph{74Dc
System.err.println("Error Code : " + nErrorCode); '3R`lv
} $By<$
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//停止文件下载 u0}vWkn\4
public void siteStop() L 8c0lx}Nn
{ sG(~^hJ_
bStop = true; 9Uh"iMB
for(int i=0;i<nStartPos.length;i++) g1;:KzVv
fileSplitterFetch.splitterStop(); zv|2:4H
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} Z|&MKG24
} `vU%*g&R
//负责部分文件的抓取 V )3KS-
**FileSplitterFetch.java ^\hG"5#
*/ \q>bs|2
package NetFox; DRSr%d
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import java.io.*; |-b#9JQ[A
import java.net.*; 4`lLf
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public class FileSplitterFetch extends Thread { $r^GE
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String sURL; //File URL +UC G0D
long nStartPos; //File Snippet Start Position '<gI8W</
long nEndPos; //File Snippet End Position HNb/-e ,"
int nThreadID; //Thread's ID ~Sdb_EZ
boolean bDownOver = false; //Downing is over ^NLmgwQ
boolean bStop = false; //Stop identical 9d>-MX'
FileAccessI fileAccessI = null; //File Access interface n|6Ic,:[
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public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException 2\)xpOj
{ mWv3!i;G<s
this.sURL = sURL; hM_lsc
this.nStartPos = nStart; 99]R$eT8
this.nEndPos = nEnd; 'HO$C,1]
nThreadID = id; kF3k7,.8&
fileAccessI = new FileAccessI(sName,nStartPos);//定位 d.[8c=$
} #?RU;1)Cw
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public void run() @tF\p
{ \|n-
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while(nStartPos < nEndPos && !bStop) gGR"Z]DBk
{ EHSlK5bD,
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try{ 2kqu p)82e
URL url = new URL(sURL); a f6M,{F
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); |e=,oV"
httpConnection.setRequestProperty("User-Agent","NetFox"); a y4 %
String sProperty = "bytes="+nStartPos+"-"; ]v?@g:iE
httpConnection.setRequestProperty("RANGE",sProperty); #./fY;:cj
Utility.log(sProperty); -Sqz5lo
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InputStream input = httpConnection.getInputStream(); J;S
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//logResponseHead(httpConnection); &PL8