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**SiteFileFetch.java Onw24&
*/ 'F7VM?HBfg
package NetFox; %t[K36,p
import java.io.*; [q3+$W \r
import java.net.*; >)3VbO
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public class SiteFileFetch extends Thread { !M^\f
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SiteInfoBean siteInfoBean = null; //文件信息Bean 4|f}F
long[] nStartPos; //开始位置 `)tA
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long[] nEndPos; //结束位置 HTR1)b
FileSplitterFetch[] fileSplitterFetch; //子线程对象 ~K`1
long nFileLength; //文件长度 bjzx!OCpV
boolean bFirst = true; //是否第一次取文件 Ow)R|/e/
boolean bStop = false; //停止标志 R&Ci/
File tmpFile; //文件下载的临时信息 no|Gq>Xp
DataOutputStream output; //输出到文件的输出流 TY6
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//负责整个文件的抓取,控制内部线程(FileSplitterFetch类) jyQVSQs
public SiteFileFetch(SiteInfoBean bean) throws IOException ,C:o`fQ\
{ $3#%aA!(#
siteInfoBean = bean; C{&)(#*L
//tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); K'Spbn!nC
tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); 0H+c4IW
if(tmpFile.exists ()) #8UseK
{ "i%jQL'.
bFirst = false; LS6ry,D"7
read_nPos(); -l[jEJS}
} (}jL_E
else 9I kUZW
{ jCQho-1QN
nStartPos = new long[bean.getNSplitter()]; Z
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nEndPos = new long[bean.getNSplitter()]; Y|RdzCM
} hVf^
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} |_nC6;
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public void run() PpFsp( )x
{ !
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//获得文件长度 e1uMR-Q
//分割文件 2LK]Q/WG,+
//实例FileSplitterFetch ]3+`` vL
//启动FileSplitterFetch线程 X+at%L=
//等待子线程返回 [gZDQcU
try{ k%Eh{dA
if(bFirst) i| 4_m
{ xYwkFB$$*
nFileLength = getFileSize(); 2-s 7cXs
if(nFileLength == -1) OZT^\Ky_l
{ sg$4G:l
System.err.println("File Length is not known!"); [#Fg\2bq_y
} ,LZ(^u
else if(nFileLength == -2) 5~U:@Tp
{ xlw 2g<s
System.err.println("File is not access!"); 74]a/'4
} @d)LRw.I
else ohsH 2]C
{ ,R~eY?{a
for(int i=0;i<nStartPos.length;i++) .YC;zn^
{ -|[~sj-p
nStartPos = (long)(i*(nFileLength/nStartPos.length)); ?Pnx~m{%*
} fYn{QS?
for(int i=0;i<nEndPos.length-1;i++) QS;F+cmTh
{ :H\&2/j
nEndPos = nStartPos[i+1]; :~33U)?{T
} $T/#1w P
nEndPos[nEndPos.length-1] = nFileLength; = t-fYV
} [-58Ezyr
} $?$9y^\
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//启动子线程 Ut_mrb+W
fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; !.X_/$c
for(int i=0;i<nStartPos.length;i++) @'gl~J7
{ UE;Bb*<
fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), w+Vk3c5uI)
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), v
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nStartPos,nEndPos,i); x~Agm_Tu+'
Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); 6RP+4c
fileSplitterFetch.start(); Mr.JLW
} L$}g3{
// fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), PGY9*0n
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); }$:#+
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// Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", u<kD}
nEndPos = " + nFileLength); XN(tcdCG
// fileSplitterFetch[nPos.length-1].start(); >2Ca5C
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//等待子线程结束 +f|6AeE
//int count = 0; IfB/O.;Kz
//是否结束while循环 XNlhu^jh
boolean breakWhile = false; C fSl
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while(!bStop) !o<ICHHH
{ "&Mou
write_nPos(); A;T[['
Utility.sleep(500); K7Gm-=%
breakWhile = true; }9=2g`2Q
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for(int i=0;i<nStartPos.length;i++) 8nsZ+,@+[
{ ]738Z/)^
if(!fileSplitterFetch.bDownOver) 3cHtf
{ M5 `m.n<
breakWhile = false; ^]7,1dH}M
break; Qg> 0G%cXU
} 4Cd#sQ
} 4oN${7k0
if(breakWhile) v~`*(Hh
break; s ^3[W0hL
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//count++; Of#K:`1@
//if(count>4) esteFLm`6
// siteStop(); z^3Q.4Qc6^
} CpSK(2j
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System.err.println("文件下载结束!"); ctK65h{Eo
} )2]a8JVf
catch(Exception e){e.printStackTrace ();} RF!'K
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} ZYDWv/u
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//获得文件长度 FW5}oD(H
public long getFileSize() yp?w3|`4;
{ hv{87`L'K(
int nFileLength = -1; pX^=be_
try{ [,GU5,o
URL url = new URL(siteInfoBean.getSSiteURL()); b"&E,=L
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); y<v|X2
httpConnection.setRequestProperty("User-Agent","NetFox"); T g{UK
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int responseCode=httpConnection.getResponseCode(); {=6)SBjf
if(responseCode>=400) B5
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{ Br&^09S
processErrorCode(responseCode); *:[b'D!A
return -2; //-2 represent access is error
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} 5pmQp}}R
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String sHeader;
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}>,CUz
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for(int i=1;;i++) -tMA
{ b@!:=_Mr
//DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); jJc07r']
//Utility.log(in.readLine()); F: ,#?
sHeader=httpConnection.getHeaderFieldKey(i); >"b[r
if(sHeader!=null) 8(^
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{ kJ__:rS(T_
if(sHeader.equals("Content-Length")) hm6pxFkX_
{ 'mUI-1GkT
nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); jNIUsM8e
break; j6}$+!E
} %!yxC
} D$mf5G &
else @C07k^j=U
break; ", QPb3
} >HX)MwAP
} _<3r'Y,
catch(IOException e){e.printStackTrace ();} M_; w%FV
catch(Exception e){e.printStackTrace ();} $Ba`VGP>)3
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Utility.log(nFileLength); 58PKx5`D
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return nFileLength; 4/f[`].#W
} l<Lz{)OR
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//保存下载信息(文件指针位置) wM0E%6
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private void write_nPos() =nw0# '
{ u
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try{ '(XW$D
output = new DataOutputStream(new FileOutputStream(tmpFile)); 4Lw'v: (
output.writeInt(nStartPos.length); 5c)<'EP
for(int i=0;i<nStartPos.length;i++) YMK>+y[+4
{ 9GaL0OWo
// output.writeLong(nPos); {n6\g]p3
output.writeLong(fileSplitterFetch.nStartPos); mgxz1d
output.writeLong(fileSplitterFetch.nEndPos); p8_2y~!
} juXC?2c
output.close(); 1P \up
} /XN*)m
catch(IOException e){e.printStackTrace ();} n-W?Z'H{r
catch(Exception e){e.printStackTrace ();} [{?;c+[
} *n,UOHlO
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//读取保存的下载信息(文件指针位置) D*qzNT@`LR
private void read_nPos() v23TL
{ y6\ [1nZ
try{ {aT92-D3
DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); FJW`$5?
int nCount = input.readInt(); -h=c=P
nStartPos = new long[nCount]; tfsh!)u?
nEndPos = new long[nCount]; &`m~o/
for(int i=0;i<nStartPos.length;i++) tgc@7
{ ea>[BB3#
nStartPos = input.readLong(); wD}EW
nEndPos = input.readLong(); bIq-1
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} <jg8y'm@0
input.close(); |fx#KNPf]
} +H[Q~P8'[
catch(IOException e){e.printStackTrace ();} H8(C>w-'
catch(Exception e){e.printStackTrace ();} 1ZKz3)K
} C9G U6Ao
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private void processErrorCode(int nErrorCode) A7.JFf>
{ rpx0|{m
System.err.println("Error Code : " + nErrorCode); f x%z|K
} EmF]W+!z%
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//停止文件下载 cj`#Tg.
public void siteStop() JE/l#Q!
{ O3!Ouh&
bStop = true; 2YaTT& J
for(int i=0;i<nStartPos.length;i++) ~>4@;
fileSplitterFetch.splitterStop(); t&8<k+m
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} tnA_!$Y
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} -aC!0O y`
//负责部分文件的抓取 *1R##9\jU7
**FileSplitterFetch.java {V{0^T-
*/ xh=FkY&d
package NetFox; gD,A9a(3
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import java.io.*; >t2]Ssi(
import java.net.*; M^Q&A R'F
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public class FileSplitterFetch extends Thread { 4V!1/w
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String sURL; //File URL Qfwwh`;
long nStartPos; //File Snippet Start Position ;L#LDk{Za
long nEndPos; //File Snippet End Position zojuH8
int nThreadID; //Thread's ID |2WxcW]U.%
boolean bDownOver = false; //Downing is over &@-1"-H
boolean bStop = false; //Stop identical ,<`|-oa
FileAccessI fileAccessI = null; //File Access interface pg5@lC]J
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public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException QJ[(Y@ O6a
{ C]aOgt/U
this.sURL = sURL; h9,wiT
this.nStartPos = nStart; l2z`<2mp
this.nEndPos = nEnd; AM1/\R
nThreadID = id; }G"r3*
fileAccessI = new FileAccessI(sName,nStartPos);//定位 Q>cL?ie
} #nxER
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public void run() /h{go]&Nb
{ *>?):-9"6N
while(nStartPos < nEndPos && !bStop) ;LwFbkOuU
{ fRZUY<t
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try{ ?6_"nT*}
URL url = new URL(sURL); ~gSF@tz@
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); MYur3lj%_
httpConnection.setRequestProperty("User-Agent","NetFox"); FKDamHL<
String sProperty = "bytes="+nStartPos+"-"; t;Fbt("]:
httpConnection.setRequestProperty("RANGE",sProperty); COxZ
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Utility.log(sProperty); @n5;|`)\
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InputStream input = httpConnection.getInputStream(); Qi(e`(,'
//logResponseHead(httpConnection); /1[}G!
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byte[] b = new byte[1024]; 9q@z[+X
int nRead; !UUmy% 9
while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) awj} K
{ xfbK eS8
nStartPos += fileAccessI.write(b,0,nRead); bxPY'&