/* !d^5mati)T
**SiteFileFetch.java ^[5yff 4
*/ $Y>LUZ)b&8
package NetFox; v k<By R
import java.io.*; ;ML21OjgN
import java.net.*; O.!|;)HQ
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public class SiteFileFetch extends Thread { s% I)+|
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SiteInfoBean siteInfoBean = null; //文件信息Bean o-49o5:1
long[] nStartPos; //开始位置 %e=BC^VW
long[] nEndPos; //结束位置 m~%IHWO'
FileSplitterFetch[] fileSplitterFetch; //子线程对象 vJK0>":G
long nFileLength; //文件长度 D4[t@*m>7
boolean bFirst = true; //是否第一次取文件 8 \%*4L'
boolean bStop = false; //停止标志 MdCEp1Z
File tmpFile; //文件下载的临时信息 1?Wk qQ
DataOutputStream output; //输出到文件的输出流 ~%>ke
#
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//负责整个文件的抓取,控制内部线程(FileSplitterFetch类) mpN|U(n
public SiteFileFetch(SiteInfoBean bean) throws IOException uh@ZHef[l
{ YJF!_kg.
siteInfoBean = bean; >u~
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//tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); TLw.rEN!;
tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); 5%uLs}{\q
if(tmpFile.exists ()) @G^
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{ Nx,.4CI
bFirst = false; w
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read_nPos(); O cd
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} #2/k^N4r
else uq{w1O5
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nStartPos = new long[bean.getNSplitter()]; U z[#t1*
nEndPos = new long[bean.getNSplitter()]; 4E<iIA\x
} 6[w_/X"
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} K+2<{qwh
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public void run() %h(J+_"L6
{ #]cO]
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//获得文件长度 AEp|#H'
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//分割文件 ~#pQWa5
//实例FileSplitterFetch p^<*v8,~7
//启动FileSplitterFetch线程 2E;UHR
//等待子线程返回 /X; [
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try{ aF]4%E
if(bFirst) w<*6pPy
{ #px74EeI\
nFileLength = getFileSize(); y)C nH4{
if(nFileLength == -1) Hj2E -RwG
{ 0z.oPV@
System.err.println("File Length is not known!"); sWa`-gc
} ko2 ?q
else if(nFileLength == -2) Pq KbG<}Y
{ )E;B'^RVR
System.err.println("File is not access!"); K!=Y4"5%
} F^fL
else Eg$ I
{ GHaD32
for(int i=0;i<nStartPos.length;i++) XOe)tz
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nStartPos = (long)(i*(nFileLength/nStartPos.length)); a9}7K/Y=d
} h/?$~OD
for(int i=0;i<nEndPos.length-1;i++) I($0&Y\De
{ *6IytWOX5
nEndPos = nStartPos[i+1]; 8Q d *OO
} @Fvp~]jCb
nEndPos[nEndPos.length-1] = nFileLength; ps[HvV"
} t<h[Lb%{T4
} {DlQTgP
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//启动子线程 m~c6b{F3Z-
fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; C&wp*
for(int i=0;i<nStartPos.length;i++) $`;1][OD
{ r}T(?KGx
fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), '1P~"P3
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), >h)D~U(H
nStartPos,nEndPos,i); &|MdBJ
Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); qca,a3k
fileSplitterFetch.start(); = j)5kY`
} "}*5'e.*
// fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), n4Xh}KtH
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); `
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// Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", ~xPU#m<
nEndPos = " + nFileLength); HV2 1=W
// fileSplitterFetch[nPos.length-1].start(); KJ (|skO
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//等待子线程结束 )?y${T
//int count = 0; ]8 vsr$E#
//是否结束while循环 OKi}aQ2R*
boolean breakWhile = false; H^sImIEUT
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while(!bStop) \gCh'3
{ W79Sz}):
write_nPos(); pGRk
Utility.sleep(500); 5FMe &
breakWhile = true; :;Xh`br
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for(int i=0;i<nStartPos.length;i++) um,G^R
{ ^vw[z2"
if(!fileSplitterFetch.bDownOver) 4$oDq
{ TTagZI$
breakWhile = false; P(xgIMc H
break; j82x$I*
} `a6AES'w$
} :P8X?C63W]
if(breakWhile) l6T^e@*
break; y0]"qB
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//count++; Xk] uXx:TN
//if(count>4) !&adO,jN+=
// siteStop(); V7<w9MM
} fnJx$PD~
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System.err.println("文件下载结束!"); #;0F-pt
} z!G?T(SpA
catch(Exception e){e.printStackTrace ();} XwZR
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} ,K15KN.'
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//获得文件长度 sK@]|9ciQ
public long getFileSize() dvcLZK
{ 50e
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int nFileLength = -1; 3~%M4(
try{ :sX4hZK=G
URL url = new URL(siteInfoBean.getSSiteURL()); 9
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HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); zI= 9
httpConnection.setRequestProperty("User-Agent","NetFox"); Z&|Dp*Z
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int responseCode=httpConnection.getResponseCode(); 7q&T2?GEN
if(responseCode>=400) )i"52!
{ G:!3X) b
processErrorCode(responseCode); uquY
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return -2; //-2 represent access is error d(YAH@
} (qw;-A
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String sHeader; GdM|?u&s"
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for(int i=1;;i++) /b]+RXvxj
{ #y8Esik
//DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); |JiN;
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//Utility.log(in.readLine()); j9/hZqo
sHeader=httpConnection.getHeaderFieldKey(i); bE!z[j]
if(sHeader!=null) b63DD(
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if(sHeader.equals("Content-Length")) ]u.)6{
{ ky{@*fg.
nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); =d$m@rc0r
break; iU|X/>k?
} x<5;#
} 4D[(X=FSU
else !jR 1!i
break; J ql$
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} 4}t$Lf_
} q}]z8 L
catch(IOException e){e.printStackTrace ();} iow"X6_l_
catch(Exception e){e.printStackTrace ();} E~S~Ld%
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Utility.log(nFileLength); zG7y$\A
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return nFileLength; je74As[
} n){u!z)Al
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//保存下载信息(文件指针位置) 0pBG^I`_
private void write_nPos() CN6b982&
{ ;73{n*a$
try{ `^)oVs
output = new DataOutputStream(new FileOutputStream(tmpFile)); v<ati c
output.writeInt(nStartPos.length); nFjaV`6`@
for(int i=0;i<nStartPos.length;i++) 2UMX%+ "J
{ >&JS-jFg
// output.writeLong(nPos); ^V"08
output.writeLong(fileSplitterFetch.nStartPos); 2E.D0E Cu
output.writeLong(fileSplitterFetch.nEndPos); z>HM$n`YD
} ^qtJcMK+hq
output.close(); [M?&JA