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**SiteFileFetch.java 7T``-:`[
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package NetFox; pD"vRbYF
import java.io.*; f8 /'%$N
import java.net.*; $aCd/&
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public class SiteFileFetch extends Thread { -F&U
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SiteInfoBean siteInfoBean = null; //文件信息Bean }TRAw#h
long[] nStartPos; //开始位置 8eIUsI.o
long[] nEndPos; //结束位置 +'@+x'/{^
FileSplitterFetch[] fileSplitterFetch; //子线程对象 h!@|RW&}qX
long nFileLength; //文件长度 <^.=>Q0S\
boolean bFirst = true; //是否第一次取文件 !2\ r LN
boolean bStop = false; //停止标志 gyHHoZc3
File tmpFile; //文件下载的临时信息 :nHKl
DataOutputStream output; //输出到文件的输出流 /StTb,
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//负责整个文件的抓取,控制内部线程(FileSplitterFetch类) p=GWq(S6
public SiteFileFetch(SiteInfoBean bean) throws IOException MiT}L
{ v dbO(
siteInfoBean = bean; .9*wY0:
//tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); -hcS]~F
tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); ] G.%Ty
if(tmpFile.exists ()) p?[Tm*r
{ (GnuWc\p
bFirst = false; `J<*9dq%
read_nPos(); +[@z(N-h
} j| Wv7
else ?PA$Ur21lw
{ K`&oC8p
nStartPos = new long[bean.getNSplitter()]; N/YWb y=H
nEndPos = new long[bean.getNSplitter()]; 75nNh~?)\
} v`J*ixZ7t
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public void run() v$~QCtc
{ w&$d* E
//获得文件长度 #&<)! YY5
//分割文件 #
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//实例FileSplitterFetch [P zv4+
//启动FileSplitterFetch线程 rD?L
//等待子线程返回 2n><RZ/9
try{ ~"pKe~h
if(bFirst) R2etB*k6[
{ c0c|z
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nFileLength = getFileSize(); 7g=2Z[o
if(nFileLength == -1) lPH%Do>K
{ VUTacA Y>L
System.err.println("File Length is not known!"); O1%pxX'`S
} kp?w2+rz
else if(nFileLength == -2) AL/?,%F
{ 7*j
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System.err.println("File is not access!"); M)*\a/6?{
} ~DO4,
else 4%WzIzRb
{ s?8<50s
for(int i=0;i<nStartPos.length;i++) G6VF>2
{ 4?N8R$
nStartPos = (long)(i*(nFileLength/nStartPos.length)); jR=s#Xz
} T|&[7%F3"
for(int i=0;i<nEndPos.length-1;i++) jF`BjxrG
{ ob+euCuJ
nEndPos = nStartPos[i+1]; RMO,ZVq
} 6nhMP$h
nEndPos[nEndPos.length-1] = nFileLength; xI,2LGO
} yx V:!gl
} 80A.<=(=.
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//启动子线程 W\1i,ew>
fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; (E,T#uc{
for(int i=0;i<nStartPos.length;i++) zf3v5Hk
{ Y*_)h\f
fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), J0zn-
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), +C7 ~b~ %
nStartPos,nEndPos,i); zMIT}$L
Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); **69rN
fileSplitterFetch.start(); {M,,npl
} ^Rm
// fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), No2b"G@
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); !lo/xQ<
// Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", }b 1cLchl
nEndPos = " + nFileLength); CJ}5T]WZ
// fileSplitterFetch[nPos.length-1].start(); :JlP[I
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//等待子线程结束 P`r55@af4
//int count = 0; d[rv1s>i
//是否结束while循环 9@Cv5L?p\
boolean breakWhile = false; bINvqv0v
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while(!bStop) Wg`R_>qQSm
{ oyo(1>
write_nPos(); [qsEUc+Z.'
Utility.sleep(500); SkU9ON
breakWhile = true; 0M\D[mg
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for(int i=0;i<nStartPos.length;i++) 8Lw B
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{ mf'V)
if(!fileSplitterFetch.bDownOver) /VG2.:
{ A'P(a`
breakWhile = false; \h8 <cTQ
break; tHLrhH<w
} A!^q
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} Z|}G6]h
if(breakWhile) HSq}7S&U
break; "`N-* ;*W
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//count++; uslQ*7S[^
//if(count>4) 4@xE8`+bG
// siteStop(); E!S 78z:
} |JCU<_<
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System.err.println("文件下载结束!"); HV<Lf
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} 4j)tfhwd8
catch(Exception e){e.printStackTrace ();} l&?ii68/
} Yw0[[N<SW
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//获得文件长度 jlxpt)0i
public long getFileSize() Y".RPiTL
{ r7qh>JrO
int nFileLength = -1; kBN+4Dr/$
try{ TsTPj8GAl[
URL url = new URL(siteInfoBean.getSSiteURL()); g:EVhuK
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); /&4U6a
httpConnection.setRequestProperty("User-Agent","NetFox"); ++E3]X|
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int responseCode=httpConnection.getResponseCode(); W6Y@U$P#G
if(responseCode>=400) ]kboG%Dl?9
{ j1(D]Z=\
processErrorCode(responseCode); "Iix
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return -2; //-2 represent access is error 71l%MH
} ~zw]5|
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String sHeader; z<5m
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for(int i=1;;i++) Qa.uMq
{ jq!tT%o*B
//DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); 4
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//Utility.log(in.readLine()); YX#-nyK
sHeader=httpConnection.getHeaderFieldKey(i); @$z<i `4
if(sHeader!=null) e>AE8T
{ {`w;39$+
if(sHeader.equals("Content-Length")) R=KQ
{ vI@%Fg+D
nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); |n] d34E
break; FJd]D[h
} qcT'nZ:
} y\x+
else 3*@5S]]
break; [n/hkXa$\
} bAx?&$
} iya"ky~H
catch(IOException e){e.printStackTrace ();} s8h-,@p
catch(Exception e){e.printStackTrace ();} )K2HK&t:
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Utility.log(nFileLength); ?y!E-&
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return nFileLength; ^k\e8F/
} nak Yn
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//保存下载信息(文件指针位置) LWt&3
private void write_nPos() c?@T1h4
{ OiP!vn}k
try{ n-@j5w+k4
output = new DataOutputStream(new FileOutputStream(tmpFile)); u#@Q:tnN_
output.writeInt(nStartPos.length); q?ix$nKOv
for(int i=0;i<nStartPos.length;i++) "V}[':fen
{ ny54XjtG,
// output.writeLong(nPos); H8On<C=
output.writeLong(fileSplitterFetch.nStartPos); Z@$8I{}G
output.writeLong(fileSplitterFetch.nEndPos); l(#)WWr+
} `F>O; >i''
output.close(); fX|Y;S-@+
} _hk.2FV:3m
catch(IOException e){e.printStackTrace ();} ~appY Av
catch(Exception e){e.printStackTrace ();} mtjh`
} f^.AD-
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