/* ~(]'ah,
**SiteFileFetch.java <.:mp1,8V
*/ '#lc?Y(pJ2
package NetFox;
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import java.io.*; MUUhg
import java.net.*; ?N]G;%3/
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public class SiteFileFetch extends Thread { |y&vMx~t
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SiteInfoBean siteInfoBean = null; //文件信息Bean ='6@^6y
long[] nStartPos; //开始位置 3j2d&*0
long[] nEndPos; //结束位置 Ls'8
FileSplitterFetch[] fileSplitterFetch; //子线程对象 R'qBG(?i
long nFileLength; //文件长度 Y8for'
boolean bFirst = true; //是否第一次取文件 ,qj M1xkL$
boolean bStop = false; //停止标志 T;v^BVn
File tmpFile; //文件下载的临时信息 Se|h]+G
DataOutputStream output; //输出到文件的输出流 |8fdhqy_
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//负责整个文件的抓取,控制内部线程(FileSplitterFetch类) +de5y]1H,|
public SiteFileFetch(SiteInfoBean bean) throws IOException 4iY
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{ Rp
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siteInfoBean = bean; lL&p?MUp
//tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); <7o@7r'0
tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); WS"v"J%
if(tmpFile.exists ()) ,{d=<j_
{ h<i.Z7F;tj
bFirst = false; 2=$ F*B>9
read_nPos(); )h1 `?q:5
} 2{S*$K[M
else .}Hs'co
{ \zzPsnFIg
nStartPos = new long[bean.getNSplitter()]; c
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nEndPos = new long[bean.getNSplitter()]; q#`;G,rs
} |#EI(W?`
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public void run() |;R-q8
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//获得文件长度 m Gx{Vpt
//分割文件 4MRN{W6
//实例FileSplitterFetch 0OBwe6*
//启动FileSplitterFetch线程 RQ,X0pS
//等待子线程返回 qWJap-hb
try{ {'cdi`
if(bFirst) %:y"o_X_
{ j#${L6
nFileLength = getFileSize(); &Qt1~#1
if(nFileLength == -1) R^rA.7T
{ ).jna`A,
System.err.println("File Length is not known!"); qot{#tk
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} Vu,:rPqI
else if(nFileLength == -2) :AyZe7:(D
{ <Ys7`e6eY
System.err.println("File is not access!"); cq9d;~q
} *oAnG:J+M
else (qDJgf4fgn
{ CFeAKjG
for(int i=0;i<nStartPos.length;i++) N|w;wF!3
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nStartPos = (long)(i*(nFileLength/nStartPos.length)); }R`}Ey|{
} '8b=4mrbH
for(int i=0;i<nEndPos.length-1;i++) _#w5hXcu
{ a]4|XJ_
nEndPos = nStartPos[i+1]; j2 jUrl
} uKo4nXVtp
nEndPos[nEndPos.length-1] = nFileLength; mWuhXY^Q
} ;(IAhWE?7
} =h}PL22
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//启动子线程 I bE Nq
fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; w^/"j_p@
for(int i=0;i<nStartPos.length;i++) ;h#CT#R2
{ $'b b)@_
fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), 94.M8
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), qGgdWDn`
nStartPos,nEndPos,i); 8\[qR_LV
Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); _RX*Ps=
fileSplitterFetch.start(); D 66!C{
} =A;79@bY
// fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), j4h?"
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); ;
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// Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", ]v.Yt/&C{
nEndPos = " + nFileLength); /!-ypIY
// fileSplitterFetch[nPos.length-1].start(); sE0,b
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//等待子线程结束 E9j(%kQ2
//int count = 0; j{P3o<l&`
//是否结束while循环 g=s2t"&
boolean breakWhile = false; X($@E!|
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while(!bStop) v9Ez0 :)
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write_nPos(); 'Y5=A!*@tf
Utility.sleep(500); a0Q\]S
breakWhile = true; CvqUaHW@
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for(int i=0;i<nStartPos.length;i++) U6 H@l#
{ O9F#gO|!
if(!fileSplitterFetch.bDownOver) Y+"Gx;F>
{ 66cPoG
breakWhile = false; }fz;La:b
break;
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} 9R4q^tGR\
} .vXe}%
if(breakWhile) 2|LkCu)~,"
break; FBrJVaF
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//count++; )>a^%V9
//if(count>4) 8wA'a'V.
// siteStop(); sg,9{R ^
} 3<HPZWc
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System.err.println("文件下载结束!"); |C;*GeyS;J
} ow,=M%x"0
catch(Exception e){e.printStackTrace ();} +#ANc;2g
} ~kPZh1n`
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//获得文件长度 3/2G~$C
public long getFileSize() r$-]NYPi
{ 6-uB[$ko
int nFileLength = -1; F%
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try{ o<%s\n
URL url = new URL(siteInfoBean.getSSiteURL()); sxQMfbN
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); S31+ j:"
httpConnection.setRequestProperty("User-Agent","NetFox"); )rv<"
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int responseCode=httpConnection.getResponseCode(); PiwI.c
if(responseCode>=400) %ck/ Z
{ <2 S?QgR,
processErrorCode(responseCode); 8BwJWxBQ
return -2; //-2 represent access is error \+sP<'~M
} :KJZo,\
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String sHeader; rfxLCiV
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for(int i=1;;i++) JZB@K6 ~dO
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//DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); X7&
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//Utility.log(in.readLine()); Y/<
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sHeader=httpConnection.getHeaderFieldKey(i); ?TVR{e:
if(sHeader!=null) /|{~GD +A&
{ z[ ml;?
if(sHeader.equals("Content-Length")) $qj||zA
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nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); o9uir"=
break; (.B+U'6
} Ndr4e?Xa,
} {H%1sI
else ;]Bkw6o
break; ~b.e9FhdA
} S4BU !
} Nb@zn0A(;
catch(IOException e){e.printStackTrace ();} %QrpFE5V5
catch(Exception e){e.printStackTrace ();} au 5qbP
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Utility.log(nFileLength); ]pP [0S
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return nFileLength; )s4a<Sc]
} z gDc=
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//保存下载信息(文件指针位置) 2DTBL:?`
private void write_nPos() ,,[pc
{ :IlJQ{=W
try{ )S6"I
output = new DataOutputStream(new FileOutputStream(tmpFile)); ^J Y]w^u
output.writeInt(nStartPos.length); w(Hio-l=
for(int i=0;i<nStartPos.length;i++) 42mZ.,<
{ F[5\
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// output.writeLong(nPos); gT~Yn~~b
output.writeLong(fileSplitterFetch.nStartPos); ;nB.f.e`
output.writeLong(fileSplitterFetch.nEndPos); /DBldL7yi
} $q~:%pQv
output.close(); s>^$: wzu
} 1ti4 ZM
catch(IOException e){e.printStackTrace ();} 3A.T_mGCs
catch(Exception e){e.printStackTrace ();} 1W
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} D/-$~u_o
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//读取保存的下载信息(文件指针位置) s5'So@L8
private void read_nPos() e[a?5,s2
{ :F`yAB3
try{ -<tfbaA
DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); xK3}zN$T
int nCount = input.readInt(); 2{E"#}/
nStartPos = new long[nCount]; B> LL
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nEndPos = new long[nCount]; Ho; bgva
for(int i=0;i<nStartPos.length;i++) |}>;wZ[7
{ o7W1sD1O
nStartPos = input.readLong(); &.}Zj*BD
nEndPos = input.readLong(); CsND:m
} =fr_` "?k
input.close(); _<i*{;kR6
} #U j~F
catch(IOException e){e.printStackTrace ();} [10;Mg
catch(Exception e){e.printStackTrace ();} UI>?"b6
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} 1]<wZV}.
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private void processErrorCode(int nErrorCode) -O?}-6,_Z
{ `Mp-4)mn
System.err.println("Error Code : " + nErrorCode); z_LN*u
} &