/* *"Ipu"G5?
**SiteFileFetch.java #kV`G.EX
*/ 9\i,3:Qc
package NetFox; Tc`LY/%Od
import java.io.*; UGPD5wX?
import java.net.*; Tp`by
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public class SiteFileFetch extends Thread { ^=wG#!#V"1
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SiteInfoBean siteInfoBean = null; //文件信息Bean #uT-_L}sw
long[] nStartPos; //开始位置 ?iUAzM8
long[] nEndPos; //结束位置
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FileSplitterFetch[] fileSplitterFetch; //子线程对象 L;'+O
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long nFileLength; //文件长度 r$6z{Na\[
boolean bFirst = true; //是否第一次取文件
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boolean bStop = false; //停止标志 fdCsn:
File tmpFile; //文件下载的临时信息 .Lp0_R@
DataOutputStream output; //输出到文件的输出流 a$FELlMv
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//负责整个文件的抓取,控制内部线程(FileSplitterFetch类) Sg0 _ l(
public SiteFileFetch(SiteInfoBean bean) throws IOException Y=4 ,d4uu
{ }$;T.[ ~
siteInfoBean = bean; l9q
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//tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); \sF}NBNT@
tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); v.,C"^W
if(tmpFile.exists ()) {JzX`Z30l
{ 8Hs>+Udl
bFirst = false; yU*j{>%RsK
read_nPos(); lyx
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} 6pQ#Zg()vp
else ^[8e|,U
{ ^ow[XEB%
nStartPos = new long[bean.getNSplitter()]; 8sg8gBt
nEndPos = new long[bean.getNSplitter()]; .dV o[m;
} JB'q_dS}
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} g{f1JTJ7
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public void run() q=}Lm;r
{ j46fQ
//获得文件长度 c:51In|~{C
//分割文件 ZQnJTS+ Rd
//实例FileSplitterFetch 2anx]QV4
//启动FileSplitterFetch线程 #=b_!~:%
//等待子线程返回 (( Ec:(:c
try{ I
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if(bFirst) ]{nFB3vtB
{ Y1Bj++?2
nFileLength = getFileSize(); Sy'/%[+goJ
if(nFileLength == -1) ev#d1s|<S
{ M{:gc7%
System.err.println("File Length is not known!"); WUdKj
} ]ODC+q1
else if(nFileLength == -2) .F?yt5{5No
{ pR&cdORsP
System.err.println("File is not access!"); _ts0@Z_:
} netKt_
else HPCgv?E3
{ 7J,W#Ql)5
for(int i=0;i<nStartPos.length;i++) }!& w<wR
{ /^#k/z
nStartPos = (long)(i*(nFileLength/nStartPos.length)); @"kA&=0;|J
} i,S%:0c7)
for(int i=0;i<nEndPos.length-1;i++) r NqJL_!
{ nV
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nEndPos = nStartPos[i+1]; HQaKG4Z
} [lQp4xgxi
nEndPos[nEndPos.length-1] = nFileLength; ,ye>D='
} %g0"Kj5
} }`IN5NdYp
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//启动子线程 nPfVZGt
fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; <hdR:k@#
for(int i=0;i<nStartPos.length;i++) //e.p6"8h
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fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), M[R, m_p
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), 5gGYG]*l
nStartPos,nEndPos,i); Vs8os+
Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); =@binTC4
fileSplitterFetch.start(); AT+|}B!
} A,lcR:@w
// fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), @p|[7'
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); aAu
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// Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", E`XUK,b
nEndPos = " + nFileLength); 3l`yy])t
// fileSplitterFetch[nPos.length-1].start(); [G[HQ)A
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//等待子线程结束 <3
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//int count = 0; idPkJf/
//是否结束while循环 i{ T0[\4
boolean breakWhile = false; 2*Z~JM
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while(!bStop) ]Vl*!,(i
{ MrLDe{^C2
write_nPos(); Y$Js5K@F
Utility.sleep(500); #g{ZfO[#
breakWhile = true; KTBsH; 6
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for(int i=0;i<nStartPos.length;i++) YANg2L>MK
{ x
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if(!fileSplitterFetch.bDownOver) /qo. Z
{ /_x?PiL
breakWhile = false; +%?_1bGX>
break; Bu>srX9f
} )f(#Fn
} -:a
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if(breakWhile) 4rwfY<G
break; @ L% 3}
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//count++; uzho>p[ae
//if(count>4) H `),PY2
// siteStop(); +X
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} _
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System.err.println("文件下载结束!"); s#)fnNQ,
} @]Iku 6d-
catch(Exception e){e.printStackTrace ();} 46Nl];g1`
} *1ku2e]z
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//获得文件长度 opte)=]J
public long getFileSize() }j+ZF'#
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int nFileLength = -1; ="d}:Jl
try{ )(PA:j
URL url = new URL(siteInfoBean.getSSiteURL()); r$=iM:kERC
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); P9G c)$6{p
httpConnection.setRequestProperty("User-Agent","NetFox"); a&.8*|w3
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int responseCode=httpConnection.getResponseCode(); EXS
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if(responseCode>=400) ^Ml)g=Fq
{ ;5PXPpJ
processErrorCode(responseCode); ::9U5E;!
return -2; //-2 represent access is error +QtK
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} ojT TYR{
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String sHeader; Y71io^td~j
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for(int i=1;;i++) ,kpkXK
{ Zh{Pzyp
//DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); yJppPIW^
//Utility.log(in.readLine()); dE.R$SM
sHeader=httpConnection.getHeaderFieldKey(i); &h`s:Y
if(sHeader!=null) [Sg1\UTl
{ &Jk0SUk MP
if(sHeader.equals("Content-Length")) 8JJqEkQ
{ s34{\/'D+
nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); Gi6sl_"q
break; 3-lJ] 7OT
} S'9T>&<Kn
} 9=ns.r
else U;`N:~|p#
break; ?`uY*+u
} Eu l,1yR
} R',Q)<
catch(IOException e){e.printStackTrace ();} ,=Xr'7w,
catch(Exception e){e.printStackTrace ();} *6df|q
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Utility.log(nFileLength); !X`
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return nFileLength; ;v^tUyhCb
} 1}Tbp_
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//保存下载信息(文件指针位置) P5P:_hr
private void write_nPos() l"W9uS;\T
{ ]EnB`g(4;
try{ E<:XHjm
output = new DataOutputStream(new FileOutputStream(tmpFile)); #@w8wCj
output.writeInt(nStartPos.length); +j1s*}8
for(int i=0;i<nStartPos.length;i++) VY<$~9a&1
{ 9 ]c2ub7
// output.writeLong(nPos); FWq+'GkSV
output.writeLong(fileSplitterFetch.nStartPos); Q]S~H+eRy
output.writeLong(fileSplitterFetch.nEndPos); l<ag\ d
} 2RFYnDN
output.close(); s+#gH@c
} IGV @tI
catch(IOException e){e.printStackTrace ();} Nv,1F
catch(Exception e){e.printStackTrace ();} -=H*(M
} yS[:C
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//读取保存的下载信息(文件指针位置) n;@PaE^8=
private void read_nPos() s )POtJ<
{ +0{m(%i
try{ 6NPCp/
DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); MCZTeYnx
int nCount = input.readInt(); EcxPbRg
nStartPos = new long[nCount]; <1YINkRz
nEndPos = new long[nCount]; q6bi{L@/R
for(int i=0;i<nStartPos.length;i++) LBq~?Q.e
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nStartPos = input.readLong(); (dd+wx't
nEndPos = input.readLong(); 5=WzKM
} 12`q9Io"
input.close(); 'W(+rTFf!
} cfBq/2I
catch(IOException e){e.printStackTrace ();}
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catch(Exception e){e.printStackTrace ();} 0"ksNnxK
} E
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private void processErrorCode(int nErrorCode) x$Y44v'>
{ 2BZYC5jy
System.err.println("Error Code : " + nErrorCode); sD H^l)4h
} ROlef;/A
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//停止文件下载 <o@&I "
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public void siteStop() ajC'C!"^Ty
{ W/!M
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bStop = true; R4"*<%1
for(int i=0;i<nStartPos.length;i++) @}eEV[Lli
fileSplitterFetch.splitterStop(); ^,*ED Yz
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} a8ya5EO
} I@Pp[AyG
//负责部分文件的抓取 U_i%@{
**FileSplitterFetch.java K&Ner(/X`6
*/ ZG[P?fM
package NetFox; @ x_.
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import java.io.*; 5b> -t#N,
import java.net.*; yY_(o]k
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public class FileSplitterFetch extends Thread { GKT2x '(e
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String sURL; //File URL G&=4@pLY5
long nStartPos; //File Snippet Start Position yHhx- `
long nEndPos; //File Snippet End Position Le;;Yd}f
int nThreadID; //Thread's ID x93h{Kf
boolean bDownOver = false; //Downing is over z"#iG&>a,
boolean bStop = false; //Stop identical )3K# ${p
FileAccessI fileAccessI = null; //File Access interface Z/-9G
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public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException p7et>;WRx
{ :btb|^C
this.sURL = sURL; lS@0 $
this.nStartPos = nStart; ha[c<e]uo[
this.nEndPos = nEnd; qE B3Y54+
nThreadID = id; e_RLKFv7
fileAccessI = new FileAccessI(sName,nStartPos);//定位 DrI"YX
} TL&