/* qGN>a[D
**SiteFileFetch.java g]h@U&`~u_
*/ OU` !c[O
package NetFox; E8PwA.
import java.io.*; *MfH\X379
import java.net.*; mEYfsO
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public class SiteFileFetch extends Thread { 7./WS,49
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SiteInfoBean siteInfoBean = null; //文件信息Bean [bKc5qp
long[] nStartPos; //开始位置 @?J7=}bzz
long[] nEndPos; //结束位置 .!^OmT,u
FileSplitterFetch[] fileSplitterFetch; //子线程对象 %n6<6t`$
long nFileLength; //文件长度 @VHstjos^V
boolean bFirst = true; //是否第一次取文件 0VQBm^$(
boolean bStop = false; //停止标志 |g \_xl
File tmpFile; //文件下载的临时信息 \kV|S=~@
DataOutputStream output; //输出到文件的输出流 #l+Rs3T:
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//负责整个文件的抓取,控制内部线程(FileSplitterFetch类) 88:YU4:l`N
public SiteFileFetch(SiteInfoBean bean) throws IOException VDv.N@)7
{ *ze/$vz-
siteInfoBean = bean; 8(-
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//tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); 4 5wqX h
tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); ,Gbc4x
if(tmpFile.exists ()) Ha]vG@?+
{ 416}# Mk
bFirst = false; #k/T\PQ0s
read_nPos(); }LS.bQKqi,
} +68age;dM
else 6qmV/DL
{ nF]E":
nStartPos = new long[bean.getNSplitter()]; %OHWGac"i
nEndPos = new long[bean.getNSplitter()]; c1i[1x%
} GMZ6 dK
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} tU Je-3,
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public void run() )mAD <y+
{ p;7wH\c
//获得文件长度 %AqI'ObC
//分割文件 O%bltNEx1
//实例FileSplitterFetch vMX\q
//启动FileSplitterFetch线程 ~mvv
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//等待子线程返回 3rZPVR$))
try{ [vuikJP>1k
if(bFirst) im+g|9@%
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nFileLength = getFileSize(); }jce5E
if(nFileLength == -1) ^wSGrV'
{ \I6F;G6
System.err.println("File Length is not known!"); I4ZbMnO
} 6^jrv [d
else if(nFileLength == -2) s!D?%
{ xh<{lZ)KJ
System.err.println("File is not access!"); `'r~3kP*NT
} 1x/ R
else 8kd):gZKZ
{ Hsov0
for(int i=0;i<nStartPos.length;i++) (6H7?nv
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nStartPos = (long)(i*(nFileLength/nStartPos.length)); P!j*4t
} ]C+PJ:CC
for(int i=0;i<nEndPos.length-1;i++) kuLur)^
{ 2YQBw,gG
nEndPos = nStartPos[i+1]; 5i{J0/'Xu)
} sm[zE/2b
nEndPos[nEndPos.length-1] = nFileLength; @o}J )
} <o|k'Y(-
} YsiH=x
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//启动子线程 ow`F 7
fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; 9T$%^H9
for(int i=0;i<nStartPos.length;i++) WSU/Z[\`H
{ c;t3I},
fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), Q9p7{^m&E
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), {#@[ttw$U
nStartPos,nEndPos,i); ~z41$~/
Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); 1S+T:n
fileSplitterFetch.start(); rK;<-RE<[:
} RxPD44jVA
// fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), J.g6<n
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); Q>\DM'{:4
// Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", d7&d
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nEndPos = " + nFileLength); Ps0<CUyI
// fileSplitterFetch[nPos.length-1].start(); eLHhfu;k
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//等待子线程结束 kDR5kDiS
//int count = 0; y fuH
//是否结束while循环 it>l?h7 I
boolean breakWhile = false; ~EQ#
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while(!bStop) |Q%nnN
{
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write_nPos(); !)J$f_88D
Utility.sleep(500); FL$S_JAw
breakWhile = true; 1B 0[dK2N
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for(int i=0;i<nStartPos.length;i++) p?
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{ wJgH15oB
if(!fileSplitterFetch.bDownOver) +>Y]1IlI
{ #4nBov3d
breakWhile = false; e !w{ap8u
break; tk 5p@l
} .k
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} Y)GU{
if(breakWhile) 5YI6$ZdQ
break; L"T :#>
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//count++; |hDN$By
//if(count>4) FKf2Q&2I
// siteStop(); x>4p6H{]0'
} 3RlNEc%)
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System.err.println("文件下载结束!"); mZ?QtyljT
} vQoZk,
catch(Exception e){e.printStackTrace ();} 931GJA~g
} r4?|sAK
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//获得文件长度 7coVl$_Zl
public long getFileSize() zqXDD; w3
{ r#}o
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int nFileLength = -1; HYJEz2RF
try{ O
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URL url = new URL(siteInfoBean.getSSiteURL()); _3g!_
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); "-IF_Hid
httpConnection.setRequestProperty("User-Agent","NetFox"); .%0a
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int responseCode=httpConnection.getResponseCode(); j(pe6
if(responseCode>=400) Lo)T
{ h]Gvt 5
processErrorCode(responseCode); egWfKL&iy
return -2; //-2 represent access is error Kb/qM}jS
} $(yi+v
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@!!5el {
String sHeader; Smh=Q4,W
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for(int i=1;;i++) }1a(*s,s-^
{ XZTH[#MqeI
//DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); KfC{/J\
//Utility.log(in.readLine()); mZnsr@KF
sHeader=httpConnection.getHeaderFieldKey(i); >V%.=})K
if(sHeader!=null) NXS$w{^
{ h>z5m
if(sHeader.equals("Content-Length")) P+e {,~o
{ )2jH&}K
nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); wr>6Go%
break; 'OU3-K
} :$XlYJrjK
} -<u_fv
else gEgd/Le
break; 5RF*c,cNq
} BISH34
} =""5
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catch(IOException e){e.printStackTrace ();} je>mAQKi\
catch(Exception e){e.printStackTrace ();} G}]'}FUp
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Utility.log(nFileLength); M@pF[J/
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return nFileLength; <c,iu{:
} ?. L]QU
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//保存下载信息(文件指针位置) ,s,AkH
private void write_nPos() [_C([o'\KY
{ Ubwmn!~
try{ w[^lxq
output = new DataOutputStream(new FileOutputStream(tmpFile)); `0 u)/s$
output.writeInt(nStartPos.length); 530Kk<%^}8
for(int i=0;i<nStartPos.length;i++) S}
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{ BG1hk!
// output.writeLong(nPos); MTbCL53!-
output.writeLong(fileSplitterFetch.nStartPos); y8v0>V0)
output.writeLong(fileSplitterFetch.nEndPos); kWCxc0
} h6:|RGF
output.close(); BGstf4v>A<
} P;IM -]
catch(IOException e){e.printStackTrace ();} l5enlYH
catch(Exception e){e.printStackTrace ();} k/Q8:qA
} sv!6zJs
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//读取保存的下载信息(文件指针位置) E7<l^/<2S+
private void read_nPos() 9SU/86|N
{ &~=d;llkT
try{ LO%OH
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DataInputStream input = new DataInputStream(new FileInputStream(tmpFile));
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int nCount = input.readInt(); BMn`t@ !x
nStartPos = new long[nCount]; , LqfwA|
nEndPos = new long[nCount]; pA\"Xe&
for(int i=0;i<nStartPos.length;i++) L*{E-m/
{ Yg;7TKy
nStartPos = input.readLong(); ;;432^jD
nEndPos = input.readLong(); $o
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} J[\8:qE
input.close(); qMd4awB
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} @A-E
catch(IOException e){e.printStackTrace ();} Saks~m7,
catch(Exception e){e.printStackTrace ();} QC1\Sn /
} 0"mr*hyj
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private void processErrorCode(int nErrorCode) T4;gF6(0]
{ 78IY&q:v&0
System.err.println("Error Code : " + nErrorCode); ]1q`N7
} \.=,}sV2Z
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//停止文件下载 byk9"QeY\
public void siteStop() {@t6[g++
{ 0.^67'
bStop = true; q9nQ/]rkHF
for(int i=0;i<nStartPos.length;i++) MX|@x~9W
fileSplitterFetch.splitterStop(); _u#r;h[
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} -]:1zU
} r
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//负责部分文件的抓取 l~x
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**FileSplitterFetch.java E/C3t2@-
*/ \"+}-!wr
package NetFox; 8?hj}}H
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import java.io.*; Ge*N%=MX8
import java.net.*; "l(<<Ha/
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public class FileSplitterFetch extends Thread { 58PL@H~@0
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String sURL; //File URL r<$"T
long nStartPos; //File Snippet Start Position ;4*mUD6
long nEndPos; //File Snippet End Position lt{"N'Gw6
int nThreadID; //Thread's ID S\@U3|Q5
boolean bDownOver = false; //Downing is over xHlO~:Lc
boolean bStop = false; //Stop identical X D\;|
FileAccessI fileAccessI = null; //File Access interface q)RTy|NJ^
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public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException %eJE@$
{ vZ|Wj] ;o
this.sURL = sURL; 0w6"p>s>c
this.nStartPos = nStart; 2-rfFqpe
this.nEndPos = nEnd; |1m2h]];Q
nThreadID = id; xp]_>WGq
fileAccessI = new FileAccessI(sName,nStartPos);//定位 -g4 {:!*D
} W'Y#(N[ktP
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public void run() _TVKvRh
{ 'c$)}R
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while(nStartPos < nEndPos && !bStop) Ne}x(uRn
{ mzn#4;m$
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try{ er2# h
URL url = new URL(sURL); vgKdhN2kI
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); >2#F5c67
httpConnection.setRequestProperty("User-Agent","NetFox"); v<gve<]
String sProperty = "bytes="+nStartPos+"-"; BBj>ML\X
httpConnection.setRequestProperty("RANGE",sProperty); 69zMWuY
Utility.log(sProperty); w[/m:R?eX
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InputStream input = httpConnection.getInputStream(); 'CvV Ktk
//logResponseHead(httpConnection); E7@m& R
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byte[] b = new byte[1024]; uL=FK
int nRead; k}e~xbh-y
while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) sE\Cv2Gx
{ Tuy5h5
nStartPos += fileAccessI.write(b,0,nRead); OJ<V<=MYZ
//if(nThreadID == 1) l' Uj"9r,
// Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); {\n?IGP?wd
} uiaZ@
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Utility.log("Thread " + nThreadID + " is over!"); }%S#d&wh$_
bDownOver = true; w!52DBOe+
//nPos = fileAccessI.write (b,0,nRead); ] U.*KkQ
} _O`s;oc
catch(Exception e){e.printStackTrace ();} '-rRD\"q
} P u,JR
} +?GsIp@>jh
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//打印回应的头信息 e0`5PVJ
public void logResponseHead(HttpURLConnection con) Vv*](iM
{ Gg5+Ap D
for(int i=1;;i++) Z<[:v2
{ f
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String header=con.getHeaderFieldKey(i); dEPLkv
if(header!=null) x+W,P
//responseHeaders.put(header,httpConnection.getHeaderField(header)); ^8
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Utility.log(header+" : "+con.getHeaderField(header)); ulNMqz\.
else J,t`ilT
break; Lwkl*
} SF[}suL
} :[ll$5E.
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public void splitterStop() =8Gpov1!V~
{ c6MMI]+8
bStop = true; ;AJ6I*O@+
} x]~&4fp
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} p4z
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/* ,(z"s8N
**FileAccess.java h|OWtf4
*//文件访问(定位,写) `"y:/F"{
package NetFox; M^.>UZKyl
import java.io.*; lF3wTf/j
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public class FileAccessI implements Serializable{ g\G}b
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//RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 !Mj28
RandomAccessFile oSavedFile; 3%
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long nPos; Fq'Ds[wd5
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public FileAccessI() throws IOException -mG ,_}F
{ z(1`Iy
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this("",0); |F&02f!]@
} pSodTG$E
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