/* `5x,N%9{
**SiteFileFetch.java "ebn0<cZ
*/ c5U1N&k5&
package NetFox; '"I"D9;9
import java.io.*; B{zIW'Ld
import java.net.*; _&yQW&vH#
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public class SiteFileFetch extends Thread { 1)k))w 9
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SiteInfoBean siteInfoBean = null; //文件信息Bean 3fBq~ Q
long[] nStartPos; //开始位置 smk0 *m4
long[] nEndPos; //结束位置 sba0Q[IY
FileSplitterFetch[] fileSplitterFetch; //子线程对象 +y -:(aP
long nFileLength; //文件长度 @Wdnc/o]
boolean bFirst = true; //是否第一次取文件 bv|v9_i
boolean bStop = false; //停止标志 L V9\
File tmpFile; //文件下载的临时信息 Ph-3,cC
DataOutputStream output; //输出到文件的输出流 }_u)3X.O
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//负责整个文件的抓取,控制内部线程(FileSplitterFetch类) qf
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public SiteFileFetch(SiteInfoBean bean) throws IOException /@on=~
{ c?wFEADn
siteInfoBean = bean; <$ '#@jW
//tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); Xr':/Qjf
tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); mz/KGZ5t
if(tmpFile.exists ()) pW!]
{ 3{,Mpb@
bFirst = false; <y!6HJ"
read_nPos(); ZP?](RV>xg
} qB"y'UW8
else _"z#I
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{ W>s<&Vb
nStartPos = new long[bean.getNSplitter()]; HaLEQ73
nEndPos = new long[bean.getNSplitter()]; XjL( V1
} m@"!=CTKd
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} <sd
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public void run() o1YhYA
{ R-Uj\M>
//获得文件长度 2R.YHj
//分割文件 RkC?(p
//实例FileSplitterFetch 92eS*x2@
//启动FileSplitterFetch线程 T*LbZ"A
//等待子线程返回 %M~Ugv_4v
try{ D*_ F@}=
if(bFirst) 5tQffo8t
{ iSHNt0Nl
nFileLength = getFileSize(); ZH/|L?Q1U
if(nFileLength == -1) b>;5#OQfn
{ OB5(4TY
System.err.println("File Length is not known!"); +U@P+;
} /V:%}Z
else if(nFileLength == -2) .LV=Z0ja
{ {}vW=
System.err.println("File is not access!"); DR^mT$
} (S1$g ~t;
else L"#Tas\5
{ 0vDP-qJV-
for(int i=0;i<nStartPos.length;i++) D[yaAG<
{ F;`es%8
nStartPos = (long)(i*(nFileLength/nStartPos.length)); l{Xsh;%=
} (r:WG!I,
for(int i=0;i<nEndPos.length-1;i++) oM QH-\(}
{ 9?l(
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nEndPos = nStartPos[i+1]; C+O`3wPZp
} >q4nQ/eP
nEndPos[nEndPos.length-1] = nFileLength; =yfr{5}R
} nM\Wa
} dYk)RX`}7!
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//启动子线程 m6aoh^I
fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; r'w5i1C+
for(int i=0;i<nStartPos.length;i++) />)>~_-3
{ Za4 YD
fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), ! X*L<)=nh
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), !|,=rM9x
nStartPos,nEndPos,i); }+ I
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Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); wf<uG|90
fileSplitterFetch.start(); 6WI_JbT~
} R+rHa#M_
// fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), ?Q:se
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); R0-ARq#0<
// Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", SAly~(r?/
nEndPos = " + nFileLength); (47jop0RDQ
// fileSplitterFetch[nPos.length-1].start(); 0Rrz
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//等待子线程结束 c-z=(Z
//int count = 0; GsE?<3
//是否结束while循环 oKzV!~{0M;
boolean breakWhile = false; m <aMb
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while(!bStop) A7~)h}~
{ T|ZT&x$z
write_nPos(); ;,@3bu>r
Utility.sleep(500); LP#CA^*S
breakWhile = true;
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for(int i=0;i<nStartPos.length;i++) 7A3e-51>
{ m6+2rD
if(!fileSplitterFetch.bDownOver) QO%>RG
{ %Xkynso~
breakWhile = false; y)Ip\.KV\
break; NM[w =
} 1[u{3lQ
} VO. Y\8/
if(breakWhile) C
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break; C@hnT<e
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//count++; _S@s
//if(count>4) wz>j>e6k`
// siteStop(); tul5:}x3
} \muyL?
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System.err.println("文件下载结束!"); HPtaW:J
} q+|Dm<Ug
catch(Exception e){e.printStackTrace ();} O_(J',++
} tv\P$|LV`8
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//获得文件长度 3P I{LU
public long getFileSize() _pjpPSV6J
{ H)t8d_^|j
int nFileLength = -1; w}oH]jVKL6
try{ g&riio7lx
URL url = new URL(siteInfoBean.getSSiteURL()); wyvs#T
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); U%w?muJW
httpConnection.setRequestProperty("User-Agent","NetFox"); yd`.Rb&V
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int responseCode=httpConnection.getResponseCode(); JF24~Q4P
if(responseCode>=400) =Lp0i9c
{ G)'cd D1
processErrorCode(responseCode); {Qlvj.Xw
return -2; //-2 represent access is error /$+ifiFT
} W#-M|
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String sHeader; a8A8?:
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for(int i=1;;i++) *hFT,1WE=+
{ 1w1(FpQO.
//DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); g0_8:Gs}^
//Utility.log(in.readLine()); l,,5OZw
sHeader=httpConnection.getHeaderFieldKey(i); 2Hy $SSH
if(sHeader!=null) H }</a%y
{ -DU[dU*~
if(sHeader.equals("Content-Length")) /38^N|/Zr
{ T9N /;3
nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); OC"W=[Myl
break; 0'VwObq
} jJ|O]v$N
} 9J0m
else '1/uf;OXIH
break; kAf2g
} >qAQNX
} F9-xp7T
catch(IOException e){e.printStackTrace ();} S%g`X
catch(Exception e){e.printStackTrace ();} #Z (B4YO
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Utility.log(nFileLength); tb{l(up/a
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return nFileLength; n#bC,
} ks:Z=%o
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//保存下载信息(文件指针位置) y$K!g&lGA
private void write_nPos() o;_v'
{ 1r|'n aiZ
try{ NR^z!+oSR
output = new DataOutputStream(new FileOutputStream(tmpFile)); BWfsk/lej
output.writeInt(nStartPos.length); m7g; psg
for(int i=0;i<nStartPos.length;i++) ZU7,=B=
{ ON]
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// output.writeLong(nPos); gKn"e|A
output.writeLong(fileSplitterFetch.nStartPos); K7U`
output.writeLong(fileSplitterFetch.nEndPos); ?psvhB{O
} 7`|$uIM`
output.close(); !1w=_
} @/E5$mX`
catch(IOException e){e.printStackTrace ();} kd9hz-*
catch(Exception e){e.printStackTrace ();} 8u!!a^F
} x.xfMM2n
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//读取保存的下载信息(文件指针位置) WENPS*0oS]
private void read_nPos() al(t-3`<
{ w8%<O^wN,
try{ NYm2fFPc
DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); O*`] ]w]
int nCount = input.readInt();
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nStartPos = new long[nCount]; #t>w)`bA-
nEndPos = new long[nCount]; Gp6|M2Vu_5
for(int i=0;i<nStartPos.length;i++)
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{ j7?53e
nStartPos = input.readLong(); /608P:U
nEndPos = input.readLong(); \/xWsbG\
} 2E9Cp
input.close(); "\Zsr6y
} ogtKj"a
catch(IOException e){e.printStackTrace ();} 2,{m>fF
catch(Exception e){e.printStackTrace ();} "M3R}<Vt
} b*+Od8r
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private void processErrorCode(int nErrorCode) NldeD2~H
{ +[<|TT
System.err.println("Error Code : " + nErrorCode); NuRxk eEO
} %AwR 4"M
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//停止文件下载 Ghs{B8
public void siteStop() _DnZ=&=MA
{ ,_,Z<X/
bStop = true; {dM18;
for(int i=0;i<nStartPos.length;i++) "g;^R/sfq
fileSplitterFetch.splitterStop(); 8=Xy19<;t
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} 3J%(2}{y
} se(ZiyHp
//负责部分文件的抓取 +Wrj%}+
**FileSplitterFetch.java +F=j1*'&
*/ rtd&WkU
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package NetFox; l*V]54|ON3
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import java.io.*; -'ePx f
import java.net.*; 'id]<<F
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public class FileSplitterFetch extends Thread { Eh/B[u7T[
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String sURL; //File URL lJ1_Zs `
long nStartPos; //File Snippet Start Position ++=t|ZS
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long nEndPos; //File Snippet End Position E_k<EQ%r
int nThreadID; //Thread's ID ElLDSo@WvR
boolean bDownOver = false; //Downing is over g$$i WC!S<
boolean bStop = false; //Stop identical TN!8J=sx.
FileAccessI fileAccessI = null; //File Access interface 6^_:N1@
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public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException BSU%.tmI
{ .H;[s
this.sURL = sURL; $3.hZx>
this.nStartPos = nStart; [HNWM/ff7+
this.nEndPos = nEnd; H809gm3(Z
nThreadID = id; 0*7N=
fileAccessI = new FileAccessI(sName,nStartPos);//定位 {6}H}_(]
} P|c[EUT
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public void run() =SMI,p&
{ $hv o^$
while(nStartPos < nEndPos && !bStop) O.OPIQ=?:w
{ g>].m8DZ'
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try{ MC=pN(l
URL url = new URL(sURL); .%Pt[VQ
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); YKCd:^u
httpConnection.setRequestProperty("User-Agent","NetFox"); |KH9 81
String sProperty = "bytes="+nStartPos+"-"; Qy< ~{6V
httpConnection.setRequestProperty("RANGE",sProperty); Js{X33^Ju
Utility.log(sProperty); Q)vf>LwC2S
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InputStream input = httpConnection.getInputStream(); &?[uY5Mk
//logResponseHead(httpConnection); V!^5#A<
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byte[] b = new byte[1024]; C|or2
int nRead; 6d%V=1^F
while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) Xx)PyO
{ 0 Z{;sW
nStartPos += fileAccessI.write(b,0,nRead); FR5P;Yz%H
//if(nThreadID == 1) i"4&UJu1;
// Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); ONr}{T%@/
} `?M?WaP
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Utility.log("Thread " + nThreadID + " is over!"); uu5L9.i9
bDownOver = true; (j>a?dKDS
//nPos = fileAccessI.write (b,0,nRead); 3fdx&}v/
} w^/jlddF
catch(Exception e){e.printStackTrace ();} o=%pR|
} DAvF ND$=
} <Sn;k[M}d
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7
//打印回应的头信息 8l<