/* -!MDYj +U
**SiteFileFetch.java Bh*~I_T a>
*/ BzA(yCu$:
package NetFox; "zw?AC6
import java.io.*; G=3/PYp
import java.net.*; H/Goaf%
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public class SiteFileFetch extends Thread { ~`hI|i<]
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SiteInfoBean siteInfoBean = null; //文件信息Bean ^lu)'z%6
long[] nStartPos; //开始位置 AnPm5i.
long[] nEndPos; //结束位置 /[[zAq{OA
FileSplitterFetch[] fileSplitterFetch; //子线程对象 O6OP{sb
long nFileLength; //文件长度 9Pd~
boolean bFirst = true; //是否第一次取文件 %@Ks<"9
boolean bStop = false; //停止标志 PZpwi?N
File tmpFile; //文件下载的临时信息 ~>D;2 S(a
DataOutputStream output; //输出到文件的输出流 d"XS;;l%<
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//负责整个文件的抓取,控制内部线程(FileSplitterFetch类) ru(Xeojv#
public SiteFileFetch(SiteInfoBean bean) throws IOException 6kT
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{ xbo-~{
siteInfoBean = bean; qPE(Lt1
//tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); VR_+/,~
tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); 7^KQQ([
if(tmpFile.exists ()) D5T\X-+]O
{ ; Z61|@Y
bFirst = false; .2
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read_nPos(); ~A8lvuw3
} vG\]xM'u
else :c)<B@NqNo
{ 30>TxL=&
nStartPos = new long[bean.getNSplitter()]; FEaf&'G]
nEndPos = new long[bean.getNSplitter()]; <4{@g]0RV
} Di *+Cz;gK
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} ]vQo^nOo
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public void run()
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{ B[4y(Im
//获得文件长度 /GM-#q
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//分割文件 Z
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//实例FileSplitterFetch J~gfMp.
//启动FileSplitterFetch线程 f`A
//等待子线程返回 T,7Y7MzF
try{ lu(G3T8
if(bFirst) G:WMocyXI'
{ K!I]/0L
nFileLength = getFileSize(); `yYgL@Zt
if(nFileLength == -1) dN |w;|M
{ //ZB B,[@
System.err.println("File Length is not known!"); GeHDc[7
} 308w0eP
else if(nFileLength == -2) ?]9uHrdsN}
{ aE#ZTc=
System.err.println("File is not access!"); h*%T2
} &1Cq+YpI
else d'[aOH4}
{ ;xB"D0~,1
for(int i=0;i<nStartPos.length;i++) :R_{tQ-WG
{ K:y q^T7
nStartPos = (long)(i*(nFileLength/nStartPos.length)); j&T/.]dX&
} Vg
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for(int i=0;i<nEndPos.length-1;i++) a
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{ ~iwEhF
nEndPos = nStartPos[i+1]; AF3t#)q
} JEHV\=
nEndPos[nEndPos.length-1] = nFileLength; zZ32K@
} oN `tZ;a
} #mkr]K8A4
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//启动子线程 7vj[ AOq3l
fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; f6|3|
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for(int i=0;i<nStartPos.length;i++) iU%Gvf^?'5
{ =l7LEkR
fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), sM5 w~R>Y
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), ^G2vA8%
nStartPos,nEndPos,i); r]HLO'<]
Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); !%s7I^f*
fileSplitterFetch.start(); "apv)xdW
} Qgx~'9
// fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), TJ;v}HSo
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); $\^]MxI
// Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", V'mpl
nEndPos = " + nFileLength); 2{V|
// fileSplitterFetch[nPos.length-1].start(); e#nTp b
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//等待子线程结束 --^D)n
//int count = 0; b%PVF&C9W
//是否结束while循环 }?fa+FQGp
boolean breakWhile = false; J$EEpL
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while(!bStop) <M&]*|q>g%
{ 6wu/6DO
write_nPos(); ]@8=e'V
Utility.sleep(500); hYWWvJ)S
breakWhile = true; %[Ds-my2
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for(int i=0;i<nStartPos.length;i++) H~G=0_S
{ ^@19cU?q
if(!fileSplitterFetch.bDownOver) =OHDp7GXO>
{ d.}rn"(z
breakWhile = false; ^|K*lI/
break; S}<
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} #TSM#Uqe
} C,<TAm
if(breakWhile) _:K}DU'6
break; jU#%@d6!#
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//count++; ]_pL79y
//if(count>4) 7>~iS@7GV
// siteStop(); 5:PZ=jPR
} 8/F2V?iT
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System.err.println("文件下载结束!"); $U0(%lIU
} uf>w* [m5
catch(Exception e){e.printStackTrace ();} @'rO=(-b
} Ucy9fM
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//获得文件长度 y]+A7|
public long getFileSize() /vV 0$vg
{ .Lp-'!i
int nFileLength = -1; 8)tyn'~i
try{ .cabw+&7
URL url = new URL(siteInfoBean.getSSiteURL()); b;O+QRa
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); 8&;dR
httpConnection.setRequestProperty("User-Agent","NetFox"); co@8w!W
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int responseCode=httpConnection.getResponseCode(); <|_Ey)1
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if(responseCode>=400) %51pf uL
{ >I!(CM":s$
processErrorCode(responseCode); Uy_=#&jg
return -2; //-2 represent access is error 2~4C5@SxL
} gJ7$G3&oZg
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String sHeader; C,]Ec2
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for(int i=1;;i++) @gj5'
{ (BGipX4
//DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); w}i.$Qt
//Utility.log(in.readLine()); ={Hbx>p
sHeader=httpConnection.getHeaderFieldKey(i); P}I*SV0
if(sHeader!=null) [KKoEZ
{ `Q hh{
if(sHeader.equals("Content-Length")) p(8\w-6
{ :Rn9rdX
nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); xle29:?l
break; wf4Q}l2,d
} F)IP~BE-k
} Uoe?5Of(*
else A^7!+1*K+
break; b2Hpuej
} d]^i1
} AK!G#ug
catch(IOException e){e.printStackTrace ();} S=2,jPX2r
catch(Exception e){e.printStackTrace ();} 0#7dm9
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Utility.log(nFileLength); x9e
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return nFileLength; <b\urtoJ
} MI }D%n*
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//保存下载信息(文件指针位置) $3ILVT
private void write_nPos() Vh8uE
{ 5-*]PAC
try{ [ n2udV
output = new DataOutputStream(new FileOutputStream(tmpFile)); \);rOqh
output.writeInt(nStartPos.length); ?1uAY.~ZZB
for(int i=0;i<nStartPos.length;i++) 2~<0<^j/]
{ _biJch
// output.writeLong(nPos); #L)rz u
output.writeLong(fileSplitterFetch.nStartPos); LcXMOT)s
output.writeLong(fileSplitterFetch.nEndPos); 'w2;oO
} Z:_y,( 1Q
output.close(); ?zEF?LJoK
} 2YyZiOMSc
catch(IOException e){e.printStackTrace ();} d#\n)eGr
catch(Exception e){e.printStackTrace ();} :9b RuUm
} >g&`g}xZQ
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//读取保存的下载信息(文件指针位置) )R4<*
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private void read_nPos() Nt8(
{ "x)DE,
try{ .vO.g/o
DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); Y"qY@`
int nCount = input.readInt(); |@BN+o;`Om
nStartPos = new long[nCount]; tp<V OUa
nEndPos = new long[nCount]; [P/gM3*'
for(int i=0;i<nStartPos.length;i++) &; \v_5N6
{ v,&2!Zv
nStartPos = input.readLong(); ho1F8TG=
nEndPos = input.readLong(); b5Pn|5AVj
} d%3BJ+J
input.close(); Ie"R,,c
} L
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catch(IOException e){e.printStackTrace ();} 6{'6_4;Fv(
catch(Exception e){e.printStackTrace ();} ^|C|=q~:
} F0Hbklr
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private void processErrorCode(int nErrorCode) N6;Z\\&0^q
{ 7&4,',0VL
System.err.println("Error Code : " + nErrorCode); L|LTsRIq
} :!$z1u8R
"> 3@<f>
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//停止文件下载 Zi)b<tM
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public void siteStop() 919g5f`
{ QGd- 9UEA]
bStop = true; =f!M=D
for(int i=0;i<nStartPos.length;i++) ]aNnY?qW5
fileSplitterFetch.splitterStop(); nY)Pxahm 7
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} F]YKYF'1I
} t5h_Q92N
//负责部分文件的抓取
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**FileSplitterFetch.java E6:p
*/ ^A`(
package NetFox; ItADO'M
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import java.io.*; jm\#($gl=
import java.net.*; Wi^rnr'Ss
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public class FileSplitterFetch extends Thread { *a!!(cZZ
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String sURL; //File URL 2-aYqMmT;
long nStartPos; //File Snippet Start Position sv"mba.J
long nEndPos; //File Snippet End Position I})t
int nThreadID; //Thread's ID #~;8#!X
boolean bDownOver = false; //Downing is over 2<Bv=B
boolean bStop = false; //Stop identical @88i/ Z_
FileAccessI fileAccessI = null; //File Access interface v v/,Rgv
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public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException X vMG09
{ PU5mz.&0'
this.sURL = sURL; ]0 RX o3
this.nStartPos = nStart; Hs=N0Sk]j
this.nEndPos = nEnd; tr8Cx~<
nThreadID = id; 4iqmi<[("
fileAccessI = new FileAccessI(sName,nStartPos);//定位 Z4ioXl
} Y&