/* [ U wi
**SiteFileFetch.java |H!9fZO
*/ 1"e)5xI
package NetFox; Z%n(O(^L
import java.io.*; .({smN,B
import java.net.*; UF@XK">
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public class SiteFileFetch extends Thread { [l8jRT=R
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SiteInfoBean siteInfoBean = null; //文件信息Bean Y)}Rb6qGW
long[] nStartPos; //开始位置 eVM/uDD
long[] nEndPos; //结束位置 l}lIi8
FileSplitterFetch[] fileSplitterFetch; //子线程对象 HX6Ma{vBk
long nFileLength; //文件长度 fa<v0vb+
boolean bFirst = true; //是否第一次取文件 "&%#!2
boolean bStop = false; //停止标志 (S
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File tmpFile; //文件下载的临时信息 I'@Ydt2
DataOutputStream output; //输出到文件的输出流 /-i!;!
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//负责整个文件的抓取,控制内部线程(FileSplitterFetch类) <fs2fTUeqF
public SiteFileFetch(SiteInfoBean bean) throws IOException 3yNU$.g
{ d`/tE?Gw
siteInfoBean = bean; 0]jA<vLR
//tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); %zOh
tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); Zt3)]sB
if(tmpFile.exists ()) \~5C7^_
{ ~D |5u\D-
bFirst = false; E.U_W
read_nPos(); pm6>_Kz
} 8zBWIi
else +/ &_v^sC;
{ "hy.GWF|*
nStartPos = new long[bean.getNSplitter()]; B)QHM+[=F
nEndPos = new long[bean.getNSplitter()]; 5j-]EJb
} %b^OeWip
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} |qoKO:B4-[
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public void run() Tdc3_<1
{ _Um d
//获得文件长度 bUY>st'
//分割文件 )nd\7|5#
//实例FileSplitterFetch h?$T!D>
//启动FileSplitterFetch线程 ~I(Hc.Q
//等待子线程返回 gp-T"l
try{ 0n/gd"M
if(bFirst) U bYEEY#
{ oQL59XOT4
nFileLength = getFileSize(); $8crN$ye
if(nFileLength == -1) 1lpwZ"
{ aIXdV2QS
System.err.println("File Length is not known!"); 0W%@gs5d&
} MJ\ eh>v&
else if(nFileLength == -2) ^xZ
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{ X.TI>90{
System.err.println("File is not access!"); W#Qmv^StZ
} ~RD+.A
else nL?oTze*p
{ ;2m<CSv!D
for(int i=0;i<nStartPos.length;i++) 9TAj) {U%'
{ q-Qxbg[>e
nStartPos = (long)(i*(nFileLength/nStartPos.length)); :h1pBEiH
} 99EXo+g
for(int i=0;i<nEndPos.length-1;i++) &'' WRgZ}
{ 9*:gr#(5
nEndPos = nStartPos[i+1]; RJeSi`19T)
} zT ZVehEe
nEndPos[nEndPos.length-1] = nFileLength; ;;)`c/$
} /Ky__l!bu
} Y\=FLO9
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! <WBCclX
//启动子线程 fKtV'/X;Q
fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; 1h7+@#<:a
for(int i=0;i<nStartPos.length;i++) A!63p$VT;
{ 8by@iQ
fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), ]P[%Mhg^
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), Yif*"oO
nStartPos,nEndPos,i); -]:GL>b
Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); tMj1~
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fileSplitterFetch.start(); Q# ?wXX47
} O3o: qly!
// fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), jtm?z c
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); a8AYcEb
// Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", },[;O^Do^{
nEndPos = " + nFileLength); +!0eu>~_&
// fileSplitterFetch[nPos.length-1].start(); gf)t)- E
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//等待子线程结束 [hRU&z;W
//int count = 0; ;PyZ?Z;
//是否结束while循环 Ei({`^
boolean breakWhile = false; ,572n[-q
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while(!bStop) (ozb%a#B
{ nF)uTk
write_nPos(); efz&@|KR
Utility.sleep(500); nkeI60
breakWhile = true; ] q~<=
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for(int i=0;i<nStartPos.length;i++) l|/:Ot
{ Z"I/ NGiU
if(!fileSplitterFetch.bDownOver) MQcr^Y_
{ |Wj;QO$C
breakWhile = false; \0FT!}
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break; f0Hq8qAF;^
} y:}sD_m0W
} {fSfq&o
if(breakWhile) 1q.(69M
break; p D=w>"
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//count++; bZipm(e
//if(count>4) ")lw9t`
// siteStop(); .+K
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} B>TSdn={>
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System.err.println("文件下载结束!"); +'03>!V
} J7i+c];!<
catch(Exception e){e.printStackTrace ();} g.Hio.fVd
} :wgfW .w
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//获得文件长度 vH?9\3
public long getFileSize() O%1/r*
{ q'(z #h,cv
int nFileLength = -1; {)K](S
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try{ FE m=w2
URL url = new URL(siteInfoBean.getSSiteURL()); =7ydk"xM*
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); eXy"^xp^
httpConnection.setRequestProperty("User-Agent","NetFox"); XrN- 2HTV
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int responseCode=httpConnection.getResponseCode(); =K$,E4*
if(responseCode>=400) _dU P7H (
{ Nf?\AK!
processErrorCode(responseCode); LAZVW</
return -2; //-2 represent access is error [>w%CY<Fd
} 5 d ;|=K
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String sHeader; O]nT>;PXX
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for(int i=1;;i++) E`@43Nz
{ F,v7ifo#f
//DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); OV5e#AOy)
//Utility.log(in.readLine()); ESDB[
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sHeader=httpConnection.getHeaderFieldKey(i); :):zNn_>`
if(sHeader!=null) VO`"<
{ bsO@2NP'
if(sHeader.equals("Content-Length")) 8sw,k
{ HcJE0-"
nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); l
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break; wq72%e
} W(&6
} 9qH[o?]
else 3ps,uozj
break; C{Blqf3V0
} 5}a"?5J^
} \f"?Tv-C'
catch(IOException e){e.printStackTrace ();} N8+P
catch(Exception e){e.printStackTrace ();} ,k*F`.[
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Utility.log(nFileLength); vR]mSX3)?
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return nFileLength; .[f;(WR
} |U=(b,
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//保存下载信息(文件指针位置) `$-lL"
private void write_nPos() dt~iw
{ :dDxxrs"
try{ aIu2>
output = new DataOutputStream(new FileOutputStream(tmpFile)); my,x9UPs
output.writeInt(nStartPos.length); j-* TXog
for(int i=0;i<nStartPos.length;i++) c$#GM57V
{ .3g&9WvN!Z
// output.writeLong(nPos); ;c)! @GoA
output.writeLong(fileSplitterFetch.nStartPos); v*L
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output.writeLong(fileSplitterFetch.nEndPos); lO&cCV;
} rv?!y8\
output.close(); !`C%Fkq
} e\~l!f'z
catch(IOException e){e.printStackTrace ();} {8ECNQ[]
catch(Exception e){e.printStackTrace ();} Uh\]?G[G
} (C~dkR?
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//读取保存的下载信息(文件指针位置) >a9l>9fyY
private void read_nPos() -kc(u1!
{ qC.i6IL
try{ 0Bu*g LY
DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); kJeu40oN
int nCount = input.readInt(); 6J;i,/ky
nStartPos = new long[nCount]; h,hL?imD
nEndPos = new long[nCount]; 1(pjVz&
for(int i=0;i<nStartPos.length;i++) +:y&{K
{ lA4hm4"i(,
nStartPos = input.readLong(); &(0N.=R
nEndPos = input.readLong(); L?.7\a@
} _3U|2(E
input.close(); l4Y1(
} "7?t)FOo
catch(IOException e){e.printStackTrace ();} !VNbj\Bp
catch(Exception e){e.printStackTrace ();} O*4gV }:G
} H%~Q?4
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private void processErrorCode(int nErrorCode) !5E9sk{)
{ .~22^k
System.err.println("Error Code : " + nErrorCode); 6puVw-X
} q]+)c2M
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//停止文件下载 TnxU/)
public void siteStop() 9C>ynH
{ qSR?,G
bStop = true; X?kPi&ru
for(int i=0;i<nStartPos.length;i++) 1!f2*m
fileSplitterFetch.splitterStop(); LK
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} `rq<jtf+
} X{s/``n
//负责部分文件的抓取 (L:`ojiU
**FileSplitterFetch.java 'XEK&Yi1
*/ #!Ze\fOC
package NetFox; ?KCxrzf
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import java.io.*; VlV)$z_
import java.net.*; <%/:w/
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public class FileSplitterFetch extends Thread { w0$R`MOR+
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String sURL; //File URL u
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long nStartPos; //File Snippet Start Position 6_Fpca3L
long nEndPos; //File Snippet End Position UMv"7~
int nThreadID; //Thread's ID 0tSA|->(
boolean bDownOver = false; //Downing is over j]#wrm
boolean bStop = false; //Stop identical 5(KG=EHj_
FileAccessI fileAccessI = null; //File Access interface $Llvp bl
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public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException G+fd.~aGE
{ (}6wAfGo
this.sURL = sURL; oq243\?Y
this.nStartPos = nStart; .?70=8{
this.nEndPos = nEnd; B0S8vU
nThreadID = id; N]V/83_
fileAccessI = new FileAccessI(sName,nStartPos);//定位 >|5XaaDa
} xdCs5ko
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public void run() z?I+u*rF6
{ Mo~ki"9.
while(nStartPos < nEndPos && !bStop) sb`&bA;i
{ P~o@9RV-
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try{ _qEWu Do
URL url = new URL(sURL); 5a8JVDLX^
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); p[_Yi0U
httpConnection.setRequestProperty("User-Agent","NetFox"); p EY>A_F
String sProperty = "bytes="+nStartPos+"-"; M9h<}mh\
httpConnection.setRequestProperty("RANGE",sProperty); HUK"OH
Utility.log(sProperty); (K<Z=a
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InputStream input = httpConnection.getInputStream(); _F3KFQ4,S-
//logResponseHead(httpConnection); `B:B7Cpvn
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byte[] b = new byte[1024]; Jk%'mEGE
int nRead; umqLKf=x!
while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) o; 6fvn
{ ~v^%ze
nStartPos += fileAccessI.write(b,0,nRead); Ri9Kr
//if(nThreadID == 1) id3)6}
// Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); ^}>zYt
} / *AJ+K._
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Utility.log("Thread " + nThreadID + " is over!"); -3u@hp_
bDownOver = true; /rn"
//nPos = fileAccessI.write (b,0,nRead); Gg'<Q.H
} <>SR 4
catch(Exception e){e.printStackTrace ();} Zlr{L]c
} Sb'N];
} U LV)0SB
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//打印回应的头信息 +SAk:3.#CV
public void logResponseHead(HttpURLConnection con) ~*jsB=XM/
{ @gH(/pFX
for(int i=1;;i++) @X3 gBGY)
{ 2f`WDL
String header=con.getHeaderFieldKey(i); @][ a8:Y9I
if(header!=null) "xL;(Fqu
//responseHeaders.put(header,httpConnection.getHeaderField(header)); f37ji
Utility.log(header+" : "+con.getHeaderField(header)); 20$F$YYuk
else c*Eok?O
break; @47[vhE
} )>-77\
} J'I1,5(
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public void splitterStop() tx2Vyu
{ dDsjPM;2
bStop = true; mrK,Ql
} i_[^s:*T
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} sI^@A=.@
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/* c-[Q,c
**FileAccess.java aQl?d<|+lk
*//文件访问(定位,写) MZ;"J82p
package NetFox; ,Wz[tYL*
import java.io.*; 6U;Jg_zS
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public class FileAccessI implements Serializable{ = 4BLc
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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 $
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RandomAccessFile oSavedFile; (eCF>Wh^m
long nPos; 9
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public FileAccessI() throws IOException +^/Nil
{ R88(dEK
this("",0); ,maAw}=
} "[%;B0J
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public FileAccessI(String sName,long nPos) throws IOException >P<k[vF
{ Ymwx(Pm
oSavedFile = new RandomAccessFile(sName,"rw"); Sf+(1_^`t
this.nPos = nPos; zF[3%qZE:T
oSavedFile.seek(nPos); 4]Un=?)I
} Paae-EmC
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public synchronized int write(byte[] b,int nStart,int nLen) :6 Hxxh
{ o 8~f
int n = -1; I
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try{ &