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**SiteFileFetch.java Rm)vY}v
*/ IS]0 3_uQ
package NetFox; 7Cp>i WV
import java.io.*; !W]># Pm
import java.net.*; G:A~nv9
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public class SiteFileFetch extends Thread { fx%'7/+
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SiteInfoBean siteInfoBean = null; //文件信息Bean }B^s!y&b
long[] nStartPos; //开始位置 ZEUd?"gaR
long[] nEndPos; //结束位置 :a#]"z0
FileSplitterFetch[] fileSplitterFetch; //子线程对象 Y5cUOfYT
long nFileLength; //文件长度 4
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boolean bFirst = true; //是否第一次取文件 RAXqRP,iw
boolean bStop = false; //停止标志
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File tmpFile; //文件下载的临时信息 : gv[X
DataOutputStream output; //输出到文件的输出流 nLQ
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//负责整个文件的抓取,控制内部线程(FileSplitterFetch类) z=BX-)
public SiteFileFetch(SiteInfoBean bean) throws IOException i
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{ l
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siteInfoBean = bean; B2WPjhzD
//tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); zZki9P
tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); hH )jX`Ta
if(tmpFile.exists ()) Q gDjc'
{ PFUb\AY
bFirst = false; ~ E>D0o
read_nPos(); k;;?3)!
} zUIh8cAoE
else ZUAWSJ,s
{ sB-c'`,w`
nStartPos = new long[bean.getNSplitter()]; 0ydAdgD
nEndPos = new long[bean.getNSplitter()]; eey <:n/Z
} yTkYPx
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} @\u)k
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public void run() g%1!YvS3v
{ 91mXv Q:u
//获得文件长度 #x)G2T'?
//分割文件 V{ra,a*
//实例FileSplitterFetch H<X4R
//启动FileSplitterFetch线程 P}DrUND
//等待子线程返回 L1P]T4a@)
try{ _
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if(bFirst) ~W%A8`9
{ Wy)|-Q7
nFileLength = getFileSize(); 1fViW^l_
if(nFileLength == -1) |>jlY|
{ D:8-f3
System.err.println("File Length is not known!"); j4ypXPY``!
} s2b!Nib
else if(nFileLength == -2) ?n\~&n'C
{ q|=tt(}G
System.err.println("File is not access!"); %zb7M%dC6`
} &=X1kQG
else QbxjfW"/+
{ (@uQ>dR:
for(int i=0;i<nStartPos.length;i++) g0cCw2S
{ UyD=x(li
nStartPos = (long)(i*(nFileLength/nStartPos.length)); H,:Cg:E/^
} b;9v.MZ4>g
for(int i=0;i<nEndPos.length-1;i++) 7{v0K"E{
{ 08yTTt76t
nEndPos = nStartPos[i+1]; j)'V_@
} IC92lPM }
nEndPos[nEndPos.length-1] = nFileLength; _Dwn@{[(8
} _+z@Qn?#6h
} $J=9$.4"
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//启动子线程 f!xIMIl)+
fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; 1PjSa4
for(int i=0;i<nStartPos.length;i++) zu*0uL
{ AG/nX?u7)t
fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), w+2:eFi=/
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), 7.8ukAud
nStartPos,nEndPos,i); RTH dL
Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); [^1;8Tbk
fileSplitterFetch.start(); kxThtjgv
} wf6ZzG:
// fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), @>(l}5U5
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); 1S
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// Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", x%vt$dy*8
nEndPos = " + nFileLength); , $78\B^
// fileSplitterFetch[nPos.length-1].start(); ^^3
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//等待子线程结束 o Ep\po1
//int count = 0; =QRLKo#_
//是否结束while循环 H]}Iw5Z
boolean breakWhile = false; 8
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while(!bStop) qNC.|R
{ csH1X/3ha\
write_nPos(); qGl+KI
Utility.sleep(500); vb5tyY0c
breakWhile = true; `r+e!o
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for(int i=0;i<nStartPos.length;i++) Ij@YOt
{ r,[vXxMy(;
if(!fileSplitterFetch.bDownOver) '`/1?,=
{ dH&N<
breakWhile = false; ?!Rlp/
break; X<,sc;"b`k
} OHp 121
} ra_`NsKF}
if(breakWhile) fVb&=%e
break; g9GE0DbT`
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//count++; py
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//if(count>4) !_l W#feR
// siteStop(); ]c[80F-
} 'ZTE"KT
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System.err.println("文件下载结束!"); Ax=Rb
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} !Lk|eGd*
catch(Exception e){e.printStackTrace ();} DE."XSni
} M!!W>A@T[g
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//获得文件长度 QmT]~4PqS
public long getFileSize() 5<,}^4wWZ
{ :E@"4O?<Y)
int nFileLength = -1; -]W AB9
try{ c<pr1g
URL url = new URL(siteInfoBean.getSSiteURL()); [M
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HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); IUbYw~f3
httpConnection.setRequestProperty("User-Agent","NetFox"); 2[qO;js
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int responseCode=httpConnection.getResponseCode(); LPO3B W
if(responseCode>=400) `)1_^# k
{ Z fL\3Mn
processErrorCode(responseCode); <CzH'!FJN
return -2; //-2 represent access is error .OX.z~":y
} B~caHG1b
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String sHeader; <M7@JgC &
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for(int i=1;;i++) [fxAj]
{ ;W'y^jp]"
//DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); v&xk?F?WU,
//Utility.log(in.readLine()); d]0fgwwGC
sHeader=httpConnection.getHeaderFieldKey(i); wu/]M~XwI
if(sHeader!=null) "'^#I_*Mf
{ Z[ZqQ` 7N
if(sHeader.equals("Content-Length")) D(@#Gd\Z@
{ Nt$/JBB[$
nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); u6awcn
break; azS"*#r6}
} 7t0\}e
} 2oGl"3/p
else f,)[f M4
break; j42U|CuK
} LXJ"ct
} ?h<I:[oZ
catch(IOException e){e.printStackTrace ();} {y`afuiB
catch(Exception e){e.printStackTrace ();} Jc-0.^]E}
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Utility.log(nFileLength); n/=&?#m}d
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return nFileLength; 4u"V52
} [`6|~E"F
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//保存下载信息(文件指针位置) '<^%>R2
private void write_nPos() 13'tsM&
{ /H: '(W_b;
try{ ;B:'8$j$
output = new DataOutputStream(new FileOutputStream(tmpFile)); J&@[=zBYw
output.writeInt(nStartPos.length); 4[ "$}O5
for(int i=0;i<nStartPos.length;i++) 15)=>=1mR.
{ K9mL1 [B
// output.writeLong(nPos); 2(\~z@g
output.writeLong(fileSplitterFetch.nStartPos); s4@AK48
output.writeLong(fileSplitterFetch.nEndPos); #?@k=e\
} >wNE!Oa*B
output.close(); 8;5 UO,`T
} 3R
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catch(IOException e){e.printStackTrace ();} Y@c!\0e$
catch(Exception e){e.printStackTrace ();} >dUnk)7
} WID4 {>G2
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//读取保存的下载信息(文件指针位置) HH&`f3
private void read_nPos() ((SN We
{ w[^s)1
try{ 2ZNTj u7h
DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); nBgksB*A
int nCount = input.readInt(); Dr^#e
nStartPos = new long[nCount]; |O%`-2p]p
nEndPos = new long[nCount]; 7i`@`0
for(int i=0;i<nStartPos.length;i++) ]uI#4t~
{ q=M!YWz
nStartPos = input.readLong(); Hq?-e?Nc
nEndPos = input.readLong(); ]S[M]-I
} <Qe30_<K
input.close(); 7{
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} *r6+Vz
catch(IOException e){e.printStackTrace ();} 8`EzvEm
catch(Exception e){e.printStackTrace ();} f]tc$`vb
} T$U,rOB"
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private void processErrorCode(int nErrorCode) ;?"]S/16,
{ Smzy EMT
System.err.println("Error Code : " + nErrorCode); Wsyq
} lEL&tZ}
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//停止文件下载 GS_'&Yj
public void siteStop() H4ml0SS^
{ +Em+W#i%?
bStop = true; |QHDg(
for(int i=0;i<nStartPos.length;i++) 2 1.;lj
fileSplitterFetch.splitterStop(); `rzgC \
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} yANk(
} )R.y>Ucb0
//负责部分文件的抓取 vY&[=2=
**FileSplitterFetch.java n@<+D`[.V
*/ ]|ew!N$ar=
package NetFox; 8Ux3,X=
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import java.io.*; A0Pg|M
import java.net.*; Ea#wtow|-
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public class FileSplitterFetch extends Thread { 8R<2I1xn2
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String sURL; //File URL 9aky+
long nStartPos; //File Snippet Start Position &~Qi+b0!
long nEndPos; //File Snippet End Position #\U;,r
int nThreadID; //Thread's ID ANh7`AUuO
boolean bDownOver = false; //Downing is over N=R|s$,Oy9
boolean bStop = false; //Stop identical k`ulDQu
FileAccessI fileAccessI = null; //File Access interface 4d~Sn81xW
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public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException C{AVV<
{ Sxo9y0K8-
this.sURL = sURL; l'TM^B)`c
this.nStartPos = nStart; |t](4
this.nEndPos = nEnd; Plpt7Pa_
nThreadID = id; OtK=UtVI
fileAccessI = new FileAccessI(sName,nStartPos);//定位 Q v=F'
} g*]Gc%
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public void run() Bs7/<$9K/
{ 6bj.z
while(nStartPos < nEndPos && !bStop) IjJO;
{ !##OQ
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try{ rq=D[vX\N(
URL url = new URL(sURL); |oCE7'BaP
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); 6XU1w
httpConnection.setRequestProperty("User-Agent","NetFox"); lxsBXX Zg
String sProperty = "bytes="+nStartPos+"-"; |-kU]NJFR
httpConnection.setRequestProperty("RANGE",sProperty); VsLlPw{
Utility.log(sProperty); x%<oeM3U
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InputStream input = httpConnection.getInputStream(); wCT. (d_
//logResponseHead(httpConnection); yc ize2>q
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byte[] b = new byte[1024]; -1^dOG6*
int nRead; 9k5$rK`
while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) %p? +r
{ ~ti{na4W<
nStartPos += fileAccessI.write(b,0,nRead); 0A$x'pU)
//if(nThreadID == 1) 3eOwy~
// Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); ~cHpA;x9<^
} /"$A?}V
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Utility.log("Thread " + nThreadID + " is over!"); 7-p9IFcA
bDownOver = true; j A/xe
//nPos = fileAccessI.write (b,0,nRead); fC1PPgQ\
} i6)7)^nG
catch(Exception e){e.printStackTrace ();} iv3=J
}
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} LI`L!6^l
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//打印回应的头信息 &35 6
public void logResponseHead(HttpURLConnection con) `TugtzRU
{ wOfx7D
for(int i=1;;i++) w4 R!aWLd
{ m6'VMW
String header=con.getHeaderFieldKey(i); ):LgZ4h
if(header!=null) "t[9EbFL
//responseHeaders.put(header,httpConnection.getHeaderField(header)); Zq,[se'nh"
Utility.log(header+" : "+con.getHeaderField(header)); R8Kj3wp
else pb>TUKvT&
break; &Nzq/~uqP
} b#h}g>l
} Wc6Jgpl
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public void splitterStop() G[;GP0\N
{ >v
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bStop = true; n\X'2
} PTt#Ixn,
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} E ISgc {s
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/* bSG}I|
**FileAccess.java /Qa'\X,f3
*//文件访问(定位,写) O_gr{L}
package NetFox; pZVT:qFF
import java.io.*; .el&\Jt
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public class FileAccessI implements Serializable{ Za"m;+H<E
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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 [Dzd39aKr
RandomAccessFile oSavedFile; j3W)
long nPos; \/wbk`2
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public FileAccessI() throws IOException 6h?v/\
{ 80'!XKSP
this("",0); E]aQK.
} ?3duW$`
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public FileAccessI(String sName,long nPos) throws IOException 0=:]tSD\F
{ 4\#b@1]}
oSavedFile = new RandomAccessFile(sName,"rw"); O
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this.nPos = nPos; dE_d.[!
oSavedFile.seek(nPos); I:l/U-b7h
} 7NFRCCXHQ
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public synchronized int write(byte[] b,int nStart,int nLen) D#.N)@\
{ \>G :mMk/
int n = -1; \nzaF4+$
try{ ii)DOq#2
oSavedFile.write(b,nStart,nLen); ,UveH` n-
n = nLen;
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} 2[V9`r8*
catch(IOException e) qQ{i2D%)?f
{ VoGyjGt&
e.printStackTrace (); o-}q|tD$<
} =/Lwprj
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return n; s(?A=JJ
} 4nz$Ja)
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} jE#&u DfI
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/* V,?BVt
**SiteInfoBean.java 6?(Z f
*/ PF+SHT'4}#
package NetFox; [
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public class SiteInfoBean { 8Buus
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private String sSiteURL; //Site's URL dBeZx1Dy
private String sFilePath; //Saved File's Path |bM?Q$>~
private String sFileName; //Saved File's Name Cvgk67C=$
private int nSplitter; //Count of Splited Downloading File y88lkV4a
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public SiteInfoBean() `at>X&Ce,
{//nSplitter的缺省值为5 *ak"}s
//default value of nSplitter is 5 d^:(-2l-
this("","","",5); ?AlTQL~c
} )*m#RqLQ8
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713)D4y}
public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) ixjhZk i<
{ FG{45/0We
sSiteURL= sURL; `9vCl@"IV
sFilePath = sPath; WWtksi,
sFileName = sName; ([Da*Tk*
this.nSplitter = nSpiltter; h4,S/n
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} VUbg{Rb)
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public String getSSiteURL() wF.S ,|
{ *D:"I!Ho
return sSiteURL; SQhw |QdG
} WvVf+|Km
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public void setSSiteURL(String value) "l7))>lL
{ |\#6?y[o
sSiteURL = value; -6yFE- X/
} D/<;9hw
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public String getSFilePath() cpJ(77e
{ 5a^b{=#Y
return sFilePath; --'!5)U
} bKb}VP
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