/* e d=pRb
**SiteFileFetch.java MM+xm{4l
*/ gJ;
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package NetFox; @scy v@5)F
import java.io.*; X\z`S##kj
import java.net.*; AM[#AZv
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public class SiteFileFetch extends Thread { vM.Y/,7S
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SiteInfoBean siteInfoBean = null; //文件信息Bean vxey$Ir
long[] nStartPos; //开始位置 ^AI5SjOUx
long[] nEndPos; //结束位置 ];3]/b)&
FileSplitterFetch[] fileSplitterFetch; //子线程对象 oCCTRLb02
long nFileLength; //文件长度 #|ppW fZQ
boolean bFirst = true; //是否第一次取文件 <l:c O$ m
boolean bStop = false; //停止标志 (O&R-5m
File tmpFile; //文件下载的临时信息 s>RtCw3,
DataOutputStream output; //输出到文件的输出流 3@t&5UjwQ
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//负责整个文件的抓取,控制内部线程(FileSplitterFetch类) oPqWL9]
public SiteFileFetch(SiteInfoBean bean) throws IOException h^H~q<R[T
{ v$P<:M M
siteInfoBean = bean; RS8tE(
//tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); q_hkI]
tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); d*Wg>8|
if(tmpFile.exists ()) EAdr}io
{ (oftq!X2
bFirst = false; |8|_^`
read_nPos(); L"_l(<g
} ~6<'cun@x
else :EkhF6B/
{ cE|Z=}4I7
nStartPos = new long[bean.getNSplitter()]; c2tf7fkH
nEndPos = new long[bean.getNSplitter()]; ^57G]$Q
} s`Y8&e.Yr
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} ;cFlZGw
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public void run() z-J?x-<
{ #835$vOe
//获得文件长度 37F&s
//分割文件 "%mu~&Ga
//实例FileSplitterFetch cnm*&1EzV
//启动FileSplitterFetch线程 Y]9AC
//等待子线程返回 e
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try{ hB!>*AsG
if(bFirst) l2&s4ERqSm
{ VJ8"Q
nFileLength = getFileSize(); 9On0om>
if(nFileLength == -1) _#SCjFz
{ M<%g )jn_
System.err.println("File Length is not known!"); MnQ4,+ji-
} k|r+/gIV
else if(nFileLength == -2) fFSQLtm?E
{ 0bcbH9) 1q
System.err.println("File is not access!"); <%SG
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} `veq/!
else n/&}|998?
{ 4U;Zs3
for(int i=0;i<nStartPos.length;i++) b W/^2B
{ 2i4&*&A
nStartPos = (long)(i*(nFileLength/nStartPos.length)); 8Hf:yG,
} .$rt>u,8<
for(int i=0;i<nEndPos.length-1;i++) (oUh:w.]Gw
{ |([|F|"
nEndPos = nStartPos[i+1]; B5pWSS
} 8+?|4'\`
nEndPos[nEndPos.length-1] = nFileLength; >U.f`24
} w]%|^:
} /'ukeK+'
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//启动子线程 q_R^Q>ZIe
fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; 8iIz!l%O
for(int i=0;i<nStartPos.length;i++) k>'c4ay290
{ 4D4Y.g_x
fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), ` 465
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siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), 2JMMNpya
nStartPos,nEndPos,i); /_?y]Ly[r
Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); 1 p|h\H
fileSplitterFetch.start(); (H_YYZ3ZX
} B=R9K3f
// fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), 0wA?.~ L
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); b.4H4LV
// Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", {'^!S"9x
nEndPos = " + nFileLength); K,$Ro@!
// fileSplitterFetch[nPos.length-1].start(); Wifr%&t{J
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//等待子线程结束 PdkS3Hz
//int count = 0; iVQ)hsW/
//是否结束while循环 *=KX0%3
boolean breakWhile = false; G|LJOq7QB
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while(!bStop) E[nJ'h<h
{ Tp.t.Qic
write_nPos(); 5?yc*mOZ
Utility.sleep(500); F s{}bQyQ
breakWhile = true; &3:U&}I
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for(int i=0;i<nStartPos.length;i++) ]i@WZ(
{ kzb%=EI
if(!fileSplitterFetch.bDownOver) ^=1:!'*3D
{ }23#z
breakWhile = false; -!s?d5k")
break; WS7a]~3'
} 4b}94e@(N
} S*D Bzl
if(breakWhile) y?}R,5k
break; / Ml d.
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//count++; tnn,lWu|
//if(count>4) zNo(|;19
// siteStop(); 'y?
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} KsG>,#
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System.err.println("文件下载结束!"); {<k}U;uiO
} p&O-]o8
catch(Exception e){e.printStackTrace ();} [? 1m6u;
} YZHqy++x
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//获得文件长度 J=OWXL!<a
public long getFileSize() 6tDCaB
{ @:M?Re`L
int nFileLength = -1; F VVpyB|
try{ '-?t^@
URL url = new URL(siteInfoBean.getSSiteURL()); q@6Je(H
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); yrgb6)]nm@
httpConnection.setRequestProperty("User-Agent","NetFox"); HEMq4v4
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int responseCode=httpConnection.getResponseCode(); ZBf9Upg
if(responseCode>=400) *9?T?S|^$F
{ (F.vVldBy
processErrorCode(responseCode); jaOt"iU.B
return -2; //-2 represent access is error $(PWN6{\r^
} zB@@Gs>
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String sHeader; V!3.MQM
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for(int i=1;;i++) Jemb0Qv
{ Z^?Y TykH
//DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); ~p'DPg4
//Utility.log(in.readLine()); S^/:O.X)c,
sHeader=httpConnection.getHeaderFieldKey(i); Z9+xB"q2
if(sHeader!=null) h=`1sfz
{ UZqQ|3
if(sHeader.equals("Content-Length")) :
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{ y9@DlK
nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); ,x.2kb
break; 8g!C'5
} ]B'H(o
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} yS2[V,vS7
else SB<09|2
break; <e%~K4KH
} H5'Le{
} ?\J.Tv$$$
catch(IOException e){e.printStackTrace ();} Pqc+p E
catch(Exception e){e.printStackTrace ();} ;[[GA0
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Utility.log(nFileLength); _hy<11S;
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return nFileLength; R{hq1-
} |!=KLJUA
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//保存下载信息(文件指针位置) Q x]zz4jD
private void write_nPos() dreEe s`|
{ 6?X)'
try{ ue~?xmZg
output = new DataOutputStream(new FileOutputStream(tmpFile)); Jjgy;*hM
output.writeInt(nStartPos.length); x(UOt;
for(int i=0;i<nStartPos.length;i++) J91O$szA
{ M^$liS.D
// output.writeLong(nPos); w' gKE'c
output.writeLong(fileSplitterFetch.nStartPos); ~l=Jx*
output.writeLong(fileSplitterFetch.nEndPos); |##rs
} _?IP}} jA:
output.close(); )ZP-t!).G#
} >aaHN1Ca
catch(IOException e){e.printStackTrace ();} i H^Gv *
catch(Exception e){e.printStackTrace ();} HR>
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} wV,l }Xb-
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//读取保存的下载信息(文件指针位置)
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private void read_nPos() nYv`{0S+m
{ Oy `2ccQ#
try{ (fYrb#]!y
DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); a=!I(50
int nCount = input.readInt(); n~wNee
nStartPos = new long[nCount]; L9FijF7
nEndPos = new long[nCount]; R>YDn|cWI
for(int i=0;i<nStartPos.length;i++) \B<A.,i4
{ .eSMI!Y=
nStartPos = input.readLong(); nU6WT |
nEndPos = input.readLong(); @}^eyS$|!
} f/VrenZ_
input.close(); dLtn,qCX0^
} "Y7
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catch(IOException e){e.printStackTrace ();} Q.N, Q`P
catch(Exception e){e.printStackTrace ();} YVEin1]
} f4k\hUA
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private void processErrorCode(int nErrorCode) u,rieKYF
{ o.Jq1$)~y
System.err.println("Error Code : " + nErrorCode); 6a=Y_fma
} I'NE>!=Q
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//停止文件下载 LT5rLdn
public void siteStop() Yom,{;Bv
{ MDo4{7
bStop = true; #1v>3H(
for(int i=0;i<nStartPos.length;i++) N]k(8K
fileSplitterFetch.splitterStop(); ^uy2qO4Yw
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} oo:(GfO}
} d/Z258
//负责部分文件的抓取 8w[nY.#T
**FileSplitterFetch.java _Q:739&
*/ q hPvU(
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package NetFox; V@(7K0
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import java.io.*; "?lm`3W"
import java.net.*; l u^fKQ
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public class FileSplitterFetch extends Thread { jmAQ!y|W.
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String sURL; //File URL :jFKTG
long nStartPos; //File Snippet Start Position !"dbK'jb^
long nEndPos; //File Snippet End Position SQZUkKfb
int nThreadID; //Thread's ID -%U 15W;
boolean bDownOver = false; //Downing is over % 1+\N
boolean bStop = false; //Stop identical iE|qU_2Y
FileAccessI fileAccessI = null; //File Access interface S!<1CFh
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public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException sp0j2<$a
{ CFW\
this.sURL = sURL; b83__i
this.nStartPos = nStart; w
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this.nEndPos = nEnd; +!I7(gL
nThreadID = id; xz+Y 1fYT
fileAccessI = new FileAccessI(sName,nStartPos);//定位 $=c79Al(
} tp3>aNj
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public void run() 9\/T #EP
{ @[qGoai
while(nStartPos < nEndPos && !bStop) ,u^S(vxyz
{ V0gk8wD
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try{ 5PJB<M_m:
URL url = new URL(sURL); &?@gUk74"
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); yW$ja|^E
httpConnection.setRequestProperty("User-Agent","NetFox"); pX:FXzYQ
String sProperty = "bytes="+nStartPos+"-"; fC_dSM[{c
httpConnection.setRequestProperty("RANGE",sProperty); ERW>G{+
Utility.log(sProperty); 93Yo}6>
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InputStream input = httpConnection.getInputStream(); \;?=h
//logResponseHead(httpConnection); H(^O{JC]y!
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byte[] b = new byte[1024]; _l&`*
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int nRead; 8QeM6;^/5
while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) gz K"'4`
{ VWlOMqL995
nStartPos += fileAccessI.write(b,0,nRead); FTy`#*7Ul
//if(nThreadID == 1) x9#>0
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// Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); +$#YW5wy
} '8NKrI
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Utility.log("Thread " + nThreadID + " is over!"); _jw A_
bDownOver = true; kF9T 9
//nPos = fileAccessI.write (b,0,nRead); ,KlTitJl\+
} |5wuYG
catch(Exception e){e.printStackTrace ();} yJaQcGxE"
} wl{Fx+<^3
} U}xQUFT|
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//打印回应的头信息 E6SGK,f0D
public void logResponseHead(HttpURLConnection con) J~5VL |ca
{ !A"`jc~x:
for(int i=1;;i++) rSIb1zJ
{ 8@)/a
String header=con.getHeaderFieldKey(i); Hp_3BulS<
if(header!=null) ~RVx~hh
//responseHeaders.put(header,httpConnection.getHeaderField(header)); J?XEF@?'G
Utility.log(header+" : "+con.getHeaderField(header)); Ve,_;<F]S
else 1NO<K`
break; C7(kV{h$d
} j:%~:
} @L%9NqE`O
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public void splitterStop() D<[4}og&]
{ \A\a=A[
bStop = true; U9;C#9E
} 5|ih>? C/(
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} pa&*n=&cL
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/* Ox"4 y
**FileAccess.java ?aInn:FE
*//文件访问(定位,写) +]Oq{v:e
package NetFox; oy!W$ ?6
import java.io.*; m:<cLc :.
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public class FileAccessI implements Serializable{
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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 _9E7;ew
RandomAccessFile oSavedFile; o/9(+AA>
long nPos; Hw34wQX
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public FileAccessI() throws IOException dL<okw
{ cpB$b C](
this("",0); M:c^[9)y
} WKZ9i2hcdf
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public FileAccessI(String sName,long nPos) throws IOException M'D;2qo
{ tFvti5
oSavedFile = new RandomAccessFile(sName,"rw"); :8U=L'4
this.nPos = nPos; 0-EhDGa]r
oSavedFile.seek(nPos); |b'fp1<