/* s$fX
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**SiteFileFetch.java pg7~%E4
*/ SJh~4R\
package NetFox; Hd\oV^>
import java.io.*; qwJp&6
import java.net.*; UjoA$A!Od;
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public class SiteFileFetch extends Thread { ^,ISz-4
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SiteInfoBean siteInfoBean = null; //文件信息Bean ;zo|. YD
long[] nStartPos; //开始位置 Sa9VwVUE
long[] nEndPos; //结束位置 MI(#~\Y~P
FileSplitterFetch[] fileSplitterFetch; //子线程对象 *P7/ry^<F
long nFileLength; //文件长度 46e?%0(
boolean bFirst = true; //是否第一次取文件 )$i,e`T
boolean bStop = false; //停止标志 b-#{O=B
File tmpFile; //文件下载的临时信息 N *$GP3]
DataOutputStream output; //输出到文件的输出流 S ;rd0+J
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//负责整个文件的抓取,控制内部线程(FileSplitterFetch类) ;ZAwf0~
public SiteFileFetch(SiteInfoBean bean) throws IOException Il*!iX|23<
{ *U$]U0M
siteInfoBean = bean; <dD!_S6@,
//tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); ~@l4T_,k
tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); bfoTGi
if(tmpFile.exists ()) '1b)(IW
{ 9@ fSO<
bFirst = false; ;UpJ_y)n8\
read_nPos(); GwP!:p|
} 7rRI-wZ
else Q
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nStartPos = new long[bean.getNSplitter()]; _Y&.Nw
nEndPos = new long[bean.getNSplitter()]; 6=$<R4B
} Lhux~,EH
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} oNPvks dC;
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public void run() i?(cp["7
{ Q"{Dijc%
//获得文件长度 hR7uAk_?
//分割文件 .$}z</#!
//实例FileSplitterFetch 7* Y*_cH5
//启动FileSplitterFetch线程 5rck]L'
//等待子线程返回 #'>)?]tn
try{ Bx5xtJ|!
if(bFirst) #9[>
{ +3-5\t`
nFileLength = getFileSize(); /"k [T
if(nFileLength == -1) \ZV>5N3hS
{ $3p 48`.\
System.err.println("File Length is not known!"); 3'0vLi
} >]ux3F3\
else if(nFileLength == -2) I)` +:+P
{ ^VMCs/g6
System.err.println("File is not access!"); "xTVu57Z[
} TS+jDs
else yBs-bp"-
{ WLj]EsA.
for(int i=0;i<nStartPos.length;i++) #\Y`?
{ >%92,hg
nStartPos = (long)(i*(nFileLength/nStartPos.length)); H^S<bZ
} :P2!& W
for(int i=0;i<nEndPos.length-1;i++) <^5$))r
{ !xR9I0V5
nEndPos = nStartPos[i+1]; p\;8?x
} j[dZ*Jr_
nEndPos[nEndPos.length-1] = nFileLength; F::Ki4{jJ
} 3>L5TYa
} }MMKOr(
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//启动子线程 "k @[7
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fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; Pi?G:IF
for(int i=0;i<nStartPos.length;i++) 965 x_
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{ svEe@Kt`
fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), ?32~%?m
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), Myg;2 .
nStartPos,nEndPos,i); *`w>\},su
Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); m`8{arz2
fileSplitterFetch.start(); +l)t5Mg\
} JS m7-p|E
// fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), }UGSE2^1
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); )Z/w|5<
// Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", P
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nEndPos = " + nFileLength); T>(X`(
// fileSplitterFetch[nPos.length-1].start(); v8 =#1YB;
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//等待子线程结束 4V,p\$;
//int count = 0; hwe6@T.#
//是否结束while循环 $X Uck[
boolean breakWhile = false; V1d#7rP
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while(!bStop) s=jH1^
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write_nPos(); <h#W*a
Utility.sleep(500); )ej1)RU"
breakWhile = true; H"w;~;h
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for(int i=0;i<nStartPos.length;i++) 'Y
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{ x5PM]~"p
if(!fileSplitterFetch.bDownOver) s92ol0`
{ ^}vf
breakWhile = false; @UdF6:T
break; q+8de_"]
} #Pd__NV"\
} *74/I>i
if(breakWhile) jf;n*
break; b#6mUl2
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//count++; pO)EYla9
//if(count>4) i; ]0>g4
// siteStop(); uc"%uc'
} .7Yox1,
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System.err.println("文件下载结束!"); .6rbn8h
} W-r^ME
catch(Exception e){e.printStackTrace ();} ^vSSG5 :
} pV8tn!
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//获得文件长度 K>~YO~~
public long getFileSize() kUGFg{"
{ GL9'dL|
int nFileLength = -1; R%2.N!8v
try{ 7>MG8pf3a
URL url = new URL(siteInfoBean.getSSiteURL()); Z6Mjc/
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); W)f=\.7
httpConnection.setRequestProperty("User-Agent","NetFox"); NM:$Q<n
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int responseCode=httpConnection.getResponseCode(); {y5 L
if(responseCode>=400) <"p-0=IgJ
{ Zz:%KUl3
processErrorCode(responseCode); FhBV.,bU,m
return -2; //-2 represent access is error 5/U{b5
} [8Z#HjhQ
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String sHeader; 9:xs)t- _
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for(int i=1;;i++) )
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{ $E; Tj|W
//DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); 6Ktq7'Z@
//Utility.log(in.readLine()); +{;wOQ.
sHeader=httpConnection.getHeaderFieldKey(i); 1D[>oK\
if(sHeader!=null) &CXk=Wj
{ kQ&Q_FSO
if(sHeader.equals("Content-Length")) Z 369<
{ ,S(Z\[x0
nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); Hq>hnCT
break; c]U+6JH
} Jh%SenP_oP
} 9o?\*{'KT
else 3
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break; RRQv<x
} Bnwq!i!M
} JP( tf+
catch(IOException e){e.printStackTrace ();} ~bzac2Rp
catch(Exception e){e.printStackTrace ();} *m>[\)
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Utility.log(nFileLength); >tMI%r
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return nFileLength; dS Tyx#o
} wRK27=\z
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//保存下载信息(文件指针位置)
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private void write_nPos() E&t8nlTx
{ :,$"Gk
try{ E^{!B]/oP
output = new DataOutputStream(new FileOutputStream(tmpFile)); 6pC1C.
output.writeInt(nStartPos.length); Vz-q7*o$S
for(int i=0;i<nStartPos.length;i++) csJ)Pt?d
{ PC255
// output.writeLong(nPos); c,)]!{c
output.writeLong(fileSplitterFetch.nStartPos); s7:_!Nd@8
output.writeLong(fileSplitterFetch.nEndPos); y>h9:q|
} pNQ7uy
output.close(); /D|q-`*K
} s]A8C^;c
catch(IOException e){e.printStackTrace ();} ;[P>
catch(Exception e){e.printStackTrace ();} 5f0g7w =-
} xbcmvJrG
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//读取保存的下载信息(文件指针位置) bJ6C7-w:wa
private void read_nPos() >6WZSw/Hq
{ ?D9iCP~~
try{ >PQ?|Uk
DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); &K