/* CCX!>k]
**SiteFileFetch.java fC$~3v
*/ d\cwUXf
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package NetFox; /&+6nOP
import java.io.*; fGv`.T _d
import java.net.*; ItoSORVV
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public class SiteFileFetch extends Thread { =&-hU|ur
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SiteInfoBean siteInfoBean = null; //文件信息Bean cZ"
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long[] nStartPos; //开始位置 's]+.3">L1
long[] nEndPos; //结束位置 B) 81mcy
FileSplitterFetch[] fileSplitterFetch; //子线程对象 Oc]&1>M
long nFileLength; //文件长度 l7]$Wc[
boolean bFirst = true; //是否第一次取文件 wmNc)P4
boolean bStop = false; //停止标志 Wu
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File tmpFile; //文件下载的临时信息 x+O}R D*G
DataOutputStream output; //输出到文件的输出流 @'EP$!c
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//负责整个文件的抓取,控制内部线程(FileSplitterFetch类) Xcq9*!%o
public SiteFileFetch(SiteInfoBean bean) throws IOException -9S.G
{ O ).1>
siteInfoBean = bean; #0-!P+c[
//tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); JuGQS24
tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); *5i~N}
if(tmpFile.exists ()) c-INVA)
{ t;DZ^Z"{
bFirst = false; ':7%@2Zo
read_nPos(); Q7y6</4f
} -S=Zsr\
else 1%L* 9>e
{ 6,Q{/
nStartPos = new long[bean.getNSplitter()]; %Km_Sy[7']
nEndPos = new long[bean.getNSplitter()]; Qa,^;hZWS
} !U"1ZsO)l
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} ta+'*@V+G
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public void run() [@}{sH(#Ta
{ Ru?Ue4W^b
//获得文件长度 Av*R(d=`
//分割文件 (BC3[R@/l
//实例FileSplitterFetch 9?*BN\E5S
//启动FileSplitterFetch线程 'aB0abr|
//等待子线程返回 b; SFnZa8
try{ S.+)">buH
if(bFirst) @o+T<}kW X
{ SnbH`\U"
nFileLength = getFileSize(); (k"oV>a|
if(nFileLength == -1) N(?yOB4gt
{ %iI0JF*Ez
System.err.println("File Length is not known!"); Z6&s 6MF
} N0c+V["s
else if(nFileLength == -2) `8F%bc54iw
{ ZkYc9!anY
System.err.println("File is not access!"); D PnKr/
} {uO8VL5+Qx
else x8T5aS
{ ]{OEU]I@
for(int i=0;i<nStartPos.length;i++) XN"V{;OP1
{ ?lb1K'(
nStartPos = (long)(i*(nFileLength/nStartPos.length)); Gvt.m&_
} nzDS
for(int i=0;i<nEndPos.length-1;i++) I~S`'()J
{ 6|#^4D)
nEndPos = nStartPos[i+1]; f8! PeQ?
} \n850PS
nEndPos[nEndPos.length-1] = nFileLength; @A6\v+ih
} n@BE*I<"
} +1p>:cih
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//启动子线程 ?B %y)K
fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; 3V`K^X3
for(int i=0;i<nStartPos.length;i++) vi0% jsI
{ asR6,k
fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), XJ]MPiXj
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), w\;=3C`
nStartPos,nEndPos,i); ?ZSG4La\
Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); &a8#qv"l
fileSplitterFetch.start(); I
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} @yaBtZUp3
// fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), +[r%y,k
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); tGzYO/Zp
// Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", "zw?AC6
nEndPos = " + nFileLength); #hd<5+$U}l
// fileSplitterFetch[nPos.length-1].start(); ~GfcI:Zz&
2 <&-
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//等待子线程结束 VzpPopD,QW
//int count = 0; <_ */
//是否结束while循环 )?pin|_x
boolean breakWhile = false; hzPx8sO
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while(!bStop) }QncTw0
{ 5"y
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write_nPos(); svyC(m)'
Utility.sleep(500); K4n1#]8i
breakWhile = true; &tD`~
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for(int i=0;i<nStartPos.length;i++) xbo-~{
{ g$dL5N7
if(!fileSplitterFetch.bDownOver) Ph]e\
{ 7^KQQ([
breakWhile = false; $EviGZFAaR
break; ~<v.WP<:
} ]-%ZN+
} ]rn!+z
if(breakWhile) lIzJO$8cM
break; w}NgFrL
Eg-b5Z);
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//count++; Z6>:k,-Ot
//if(count>4) 9aZ3W<N`M
// siteStop(); r=L9x/r
}
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System.err.println("文件下载结束!"); J-?\,N1R7
} N>ct`a)BD/
catch(Exception e){e.printStackTrace ();} z8Dn<h
} !kASEjFz|f
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//获得文件长度 y13=y}dyDH
public long getFileSize() l`I]eTo)^
{ tx5_e[
int nFileLength = -1; 308w0eP
try{ nZ\,ZqV
URL url = new URL(siteInfoBean.getSSiteURL()); aE#ZTc=
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); ;S?1E:\av
httpConnection.setRequestProperty("User-Agent","NetFox"); K/\#FJno
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int responseCode=httpConnection.getResponseCode(); 6-KC[J^Xo
if(responseCode>=400) ~O1*]
{ 0^E!P>
processErrorCode(responseCode); :WA o{|&
return -2; //-2 represent access is error { tR=D_5
} @%\ANM$S
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String sHeader; 3sp*.dk
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for(int i=1;;i++) E 3I'3
{ n;Iey[7_E`
//DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); ['s_qCA[
//Utility.log(in.readLine()); mH{cGu?
sHeader=httpConnection.getHeaderFieldKey(i); >P0AGZ
if(sHeader!=null) ]NFDE-Jz]
{
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if(sHeader.equals("Content-Length")) M\v4{\2l0
{ /$eEj
nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); E0O{5YF^T
break; FJ U)AjS~
} ^w&TTo(
} )D[xY0Y~
else }7.q[ ^oF
break; EL}v>sC
} Tl%4L%
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} LWQ BGiJj
catch(IOException e){e.printStackTrace ();} f "&q~V4?
catch(Exception e){e.printStackTrace ();} b%PVF&C9W
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Utility.log(nFileLength); FwW%@Y
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return nFileLength; <M&]*|q>g%
} n/|/Womr
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//保存下载信息(文件指针位置) ^U`q1Pg5
private void write_nPos() <=7)t.
{ ~IqT>
try{ njq-iU
output = new DataOutputStream(new FileOutputStream(tmpFile)); X4k/7EA
output.writeInt(nStartPos.length); F_r eBPx
for(int i=0;i<nStartPos.length;i++) /uyQ>Y*-\Y
{ ix#
// output.writeLong(nPos); D$mrnm4d
output.writeLong(fileSplitterFetch.nStartPos); l:|Fs=\
output.writeLong(fileSplitterFetch.nEndPos); ):|)/ZiC'
} ?Jr<gn^D
output.close(); /N^+a-.Qd
} zp9 ?Ia
catch(IOException e){e.printStackTrace ();} o>*{5>#k'
catch(Exception e){e.printStackTrace ();} ]_pL79y
} 7>~iS@7GV
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//读取保存的下载信息(文件指针位置) n=>Gu9`
private void read_nPos() C=b5[, UCB
{ 785iY865
try{ r9t{/})A
DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); *FE<'+%
int nCount = input.readInt(); PA=BNKlH
nStartPos = new long[nCount]; *7v PU:Q[
nEndPos = new long[nCount]; WcJ{}V9
for(int i=0;i<nStartPos.length;i++) tV,zz;* Oe
{ y@Or2bO#
nStartPos = input.readLong(); 'q-h
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nEndPos = input.readLong(); .F6#s
} g Q9ff,
input.close(); 6\Z^L1973
} [T^6Kzz
catch(IOException e){e.printStackTrace ();} W&Hf}qs
catch(Exception e){e.printStackTrace ();} MmK\|CtV
} LgnGqIlx
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private void processErrorCode(int nErrorCode) Uy_=#&jg
{ 2~4C5@SxL
System.err.println("Error Code : " + nErrorCode); P>kx{^
} Tc*PDt0C
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//停止文件下载 :ox CF0Y
public void siteStop() lt4UNJ3w
{ HkN +:
bStop = true; Rta P+6'X
for(int i=0;i<nStartPos.length;i++) MDq @:t
fileSplitterFetch.splitterStop(); +vnaEy
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} :h3JDQe:.
} x V e!
//负责部分文件的抓取 CP'-CQ\Q
**FileSplitterFetch.java 7.t$#fzi
*/ wf4Q}l2,d
package NetFox; dWUu3
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import java.io.*; 6{~I7!m"
import java.net.*; f1{ckHAY55
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public class FileSplitterFetch extends Thread { O`=Uq0Vv
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String sURL; //File URL 40E[cGz$*
long nStartPos; //File Snippet Start Position neBkwXF!
long nEndPos; //File Snippet End Position <*+MBF
int nThreadID; //Thread's ID ivq4/Y]-X
boolean bDownOver = false; //Downing is over pDLo`F}A
boolean bStop = false; //Stop identical @RP|?Xc{?
FileAccessI fileAccessI = null; //File Access interface J\*d4I<(Rt
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public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException Uww^Sq
{
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this.sURL = sURL; b+hY^$//
this.nStartPos = nStart; .<B1i
this.nEndPos = nEnd; hTm}j,H
nThreadID = id; I}WJ0}R
fileAccessI = new FileAccessI(sName,nStartPos);//定位 \);rOqh
} X@)lPr$a
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public void run() Xwi&uyvU&
{ TG9)x|!
while(nStartPos < nEndPos && !bStop) p1nA7;B-m
{ 2&m7pcls
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try{ -ZB"Yg$l
URL url = new URL(sURL); Exr7vL
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); 7E95"B&w
httpConnection.setRequestProperty("User-Agent","NetFox"); R;o_ *
String sProperty = "bytes="+nStartPos+"-"; dc)Gk
httpConnection.setRequestProperty("RANGE",sProperty); _+En%p.m
Utility.log(sProperty); )R4<*
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InputStream input = httpConnection.getInputStream(); hqPn~Tq
//logResponseHead(httpConnection); q*OKA5
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byte[] b = new byte[1024]; Q\76jD`m\
int nRead; iIFQRnpu;3
while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) <B`V
{ 4lA+V,#
nStartPos += fileAccessI.write(b,0,nRead); K^Ht$04
//if(nThreadID == 1) z"3c+?2
// Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); (zBQ^97]
} Z3dd9m#.]
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Utility.log("Thread " + nThreadID + " is over!"); )a\h5nQI)
bDownOver = true; +b+sQ<w?.
//nPos = fileAccessI.write (b,0,nRead); D;]%
} 7&4,',0VL
catch(Exception e){e.printStackTrace ();} L|LTsRIq
} WIm7p1U#V
} +QX>:z
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//打印回应的头信息 &pm{7nH
public void logResponseHead(HttpURLConnection con) ` qTY
{ >9`ep7
for(int i=1;;i++) vXbT E$
{ aTsfl
String header=con.getHeaderFieldKey(i); J|-HZ-Wk|J
if(header!=null) sFK<:ka
//responseHeaders.put(header,httpConnection.getHeaderField(header)); DOe KW
Utility.log(header+" : "+con.getHeaderField(header)); W#j,{&KVn
else @3YuV=QfH
break; U[l%oLra
} ItADO'M
} l #Q`f.
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public void splitterStop() sE6J:m(
{ s~
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bStop = true; Tm\[q
} OU@x1G{Cy
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} =joXP$n^
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/* \F~Cbj+'Nu
**FileAccess.java G4' U;
*//文件访问(定位,写) cg00t+
package NetFox; YS~t d+*
import java.io.*; 9Z'eBp
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public class FileAccessI implements Serializable{ T+R I8.#o
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//RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 bK\WdG\;
RandomAccessFile oSavedFile; b6&NzUt34V
long nPos; !"%sp6Wc
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public FileAccessI() throws IOException ;bZ*6-\!-
{ 1Uk~m
this("",0); JyC&L6[]Z
} Z&jb,eh2
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public FileAccessI(String sName,long nPos) throws IOException wg<|@z5
{ m,C,<I|'d
oSavedFile = new RandomAccessFile(sName,"rw"); 3]n@c?lw
this.nPos = nPos; FJ8@b
oSavedFile.seek(nPos); I0+wczW,^
} 1xAFu+
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public synchronized int write(byte[] b,int nStart,int nLen) w/5^R
{ yr2L
int n = -1; \&&(ytL
try{ ) Zo_6%
oSavedFile.write(b,nStart,nLen); 9,f<Nb(\
n = nLen; 7G(f1Y
} V}fKV6 v9
catch(IOException e) > '
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{ 6h6?BQSE
e.printStackTrace (); 1] Q2qs
} #0hNk%X=
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return n; nVn|$ "r
} ywynx<Wg
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} t-*|Hfp*^
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/* E\~ KVn
**SiteInfoBean.java ITIj=!F*
*/ %M#?cmt
package NetFox; C]yQ "b
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public class SiteInfoBean { Nv?-*&