/* T=YVG@fm?
**SiteFileFetch.java &X:;B'
*/ >D u=(pB
package NetFox; yC$m(Y12FN
import java.io.*; [(Z(8{3i
import java.net.*; =_BHpgL
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public class SiteFileFetch extends Thread { b%MZfaU
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SiteInfoBean siteInfoBean = null; //文件信息Bean a6vej
long[] nStartPos; //开始位置 |Io:D:
long[] nEndPos; //结束位置 }&/>v' G
FileSplitterFetch[] fileSplitterFetch; //子线程对象 55s5(]`d
long nFileLength; //文件长度 [c=P)t7
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boolean bFirst = true; //是否第一次取文件 nG4ZOx.*1g
boolean bStop = false; //停止标志 3);P!W4>
File tmpFile; //文件下载的临时信息 roc DO8f
DataOutputStream output; //输出到文件的输出流 Y _`JS;
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//负责整个文件的抓取,控制内部线程(FileSplitterFetch类) Lqxhy s
public SiteFileFetch(SiteInfoBean bean) throws IOException D)x^?!
{ rK'Lvt@w
siteInfoBean = bean; \{ | GK
//tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); L}{3_/t
tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); :@jctH~
if(tmpFile.exists ()) @P~%4:!Hr
{ ?3K~4-!?/
bFirst = false; F-zIzzb&O
read_nPos(); OWrQKd
} y'`7zJ
else GdUsv
{ bvh#Q_
nStartPos = new long[bean.getNSplitter()]; [err$
nEndPos = new long[bean.getNSplitter()]; ]/Nt
} *#>(P
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} bP-(N14x+
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public void run() OEl;R7aOB&
{ M2ex
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//获得文件长度 kOo Vqu
//分割文件 TYD( 6N
//实例FileSplitterFetch _4)
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//启动FileSplitterFetch线程 e0y.J
//等待子线程返回
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try{ FVl,
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if(bFirst) e eN`T&cI
{ ~l:Cj*6x8
nFileLength = getFileSize(); 1Q
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if(nFileLength == -1) X=-= z5
{ yLLA:5Q1
System.err.println("File Length is not known!"); Zs/-/C|
} Pi=FnS
else if(nFileLength == -2) >WZ%Pv*
{ MF.!D;s
System.err.println("File is not access!"); *A!M0TK?i,
} TJRp/BP
else R5QW4i9
{ N)cODy([
for(int i=0;i<nStartPos.length;i++) t)8crX}P
{ z =H?@z
nStartPos = (long)(i*(nFileLength/nStartPos.length)); EwG+' nlE
} d(t)8k$
for(int i=0;i<nEndPos.length-1;i++) X~m57bj
{ "24d:vf\
nEndPos = nStartPos[i+1]; }Y.@:v
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} j,].88H
nEndPos[nEndPos.length-1] = nFileLength; }P%gwgPK
} 4J,6cOuW4
} @>U9CL"
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//启动子线程 yg}L,JJU<
fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; {=I,+[(
for(int i=0;i<nStartPos.length;i++) 'p[6K'Uq5
{ _6.@^\;
fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), `::j\3B&Y-
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), h\#4[/
nStartPos,nEndPos,i); 6C.!+km
Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); Vt zSM%=
fileSplitterFetch.start(); UE_>@_T
} ;QuxTmWp^
// fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), tZ=|1lM
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); }T902RL0
// Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", ~qb?#IY]`
nEndPos = " + nFileLength); O+XQP!T
// fileSplitterFetch[nPos.length-1].start(); uq:'`o-1
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//等待子线程结束 "OUY^ cM
//int count = 0; cQh{z8Bf?<
//是否结束while循环 "[A&S!
boolean breakWhile = false; &C,]c#-+
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while(!bStop) jvd3_L-@E<
{ !5m~qet.
write_nPos(); 3 5-FD{
Utility.sleep(500); Jz;`L3m
breakWhile = true; QKz2ONV=)
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for(int i=0;i<nStartPos.length;i++) AsZyPybq
{ nYRD>S?uz
if(!fileSplitterFetch.bDownOver) Vyx&MU.-J
{ `~=Is.V[
breakWhile = false; f}FJR6VO
break; U_B`SS
} gJOswN;([
} nzYFa J +
if(breakWhile) +xmZK<{<
break; ^eYJ7&t
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//count++; \v9<L'NP)
//if(count>4) hi]\M)l&x
// siteStop(); kS7T'[d
} QPF[D7\
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System.err.println("文件下载结束!"); 1G8t=IA%D
} RzSN,bLR
catch(Exception e){e.printStackTrace ();} LyXABQ]
} tX}Fb0y
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//获得文件长度 .^1=*j(;
public long getFileSize() f.r-,%^6{
{ Nb{oH +$b
int nFileLength = -1; /L[:C=u
try{ 2Z..~1r
URL url = new URL(siteInfoBean.getSSiteURL()); 4'; ['
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); veE8
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httpConnection.setRequestProperty("User-Agent","NetFox"); K<_H`k*x
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int responseCode=httpConnection.getResponseCode(); N4mQN90t
if(responseCode>=400) |s`q+ U -
{ ]g+(#x_.?
processErrorCode(responseCode); D{z=)'/F
return -2; //-2 represent access is error ~d5{Q?T)
} T
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String sHeader; n2O7n@8
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for(int i=1;;i++) K|1^?#n
{ (c*Dvpo1
//DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); ,zyrBO0 Eq
//Utility.log(in.readLine()); \)"qN^we
sHeader=httpConnection.getHeaderFieldKey(i); Ua3ERBX{
if(sHeader!=null) %E!0,y,:
{ XF$C)id2p
if(sHeader.equals("Content-Length")) q
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{ =gqZ^v&5U
nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); &boBu^,94
break; nz&JG~Qfm
} tE>:kx0*3
} &\K#UVDyhh
else K^vMIo h
break; sR0nY8@F
} ^b.J z}
} Zj0&/S
catch(IOException e){e.printStackTrace ();} eK@Y] !lz
catch(Exception e){e.printStackTrace ();} 1|89-Ii]
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Utility.log(nFileLength); pVY.&XBZ$
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return nFileLength; +$'/!vN
} :4Vt
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//保存下载信息(文件指针位置) 'mM5l*{
private void write_nPos() btE+.V
{ M/qiA.C@W
try{ {Q"<q`c
output = new DataOutputStream(new FileOutputStream(tmpFile)); zYNJF>^<
output.writeInt(nStartPos.length); s5dh]vNN
for(int i=0;i<nStartPos.length;i++) 5*r6#[S\
{ "8I4]'
// output.writeLong(nPos); wtKh8^:YD
output.writeLong(fileSplitterFetch.nStartPos); Ww~0k!8,t
output.writeLong(fileSplitterFetch.nEndPos); 90!Ib~7zH
} 6M9rC[h\
output.close(); %Z?
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} !|/fVWH
catch(IOException e){e.printStackTrace ();} XTJ>y@
catch(Exception e){e.printStackTrace ();} AQ5v`xE4
} T_-MSXhA
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//读取保存的下载信息(文件指针位置) _<7FR:oBZ
private void read_nPos() YovY0nO
{ 4@I]PG
try{ O#\>j
DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); 96avgyc
int nCount = input.readInt(); (YOgQ)},
nStartPos = new long[nCount]; d8#j@='a*
nEndPos = new long[nCount]; !)=o,sVA
for(int i=0;i<nStartPos.length;i++) Dhoj|lc
{ +q$|6?
nStartPos = input.readLong(); Tjqn::~D
nEndPos = input.readLong(); Cs{f'I
} P>-,6a>
input.close(); `,Gk1~Wv
} O@rb4(
catch(IOException e){e.printStackTrace ();} ]Yex#K
catch(Exception e){e.printStackTrace ();} Hi9z<l=$
} |Y11sDa9h
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private void processErrorCode(int nErrorCode) v_0!uT5~NE
{ l0{DnQA>I
System.err.println("Error Code : " + nErrorCode); dk/*%a
+
} sBnPS[Oo
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//停止文件下载 H)Ge#=;ckQ
public void siteStop() (?y2@I}
{ c^IEj1@}'?
bStop = true; 17oxD
for(int i=0;i<nStartPos.length;i++) zQ}N
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fileSplitterFetch.splitterStop(); ,v_r$kh^
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} {2^@jD
} C:MGi7f
//负责部分文件的抓取 jqWvLBU!
**FileSplitterFetch.java u$8MVP
*/ g"S+V#R
package NetFox; -<]_:Kf{;&
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import java.io.*; [)>8z8'f
import java.net.*; +lJ]-U|P
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public class FileSplitterFetch extends Thread { Zb;$ZUWQX
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String sURL; //File URL :~R
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long nStartPos; //File Snippet Start Position 4^_Au^8R(
long nEndPos; //File Snippet End Position 5G;^OI!g
int nThreadID; //Thread's ID [(EH
boolean bDownOver = false; //Downing is over |o=ST
boolean bStop = false; //Stop identical luk2fi<$
FileAccessI fileAccessI = null; //File Access interface F{~r7y;0
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public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException FKnQwX.0
{ -01 1U!
this.sURL = sURL; 6-14Htsk6
this.nStartPos = nStart; y"p-8RVk{
this.nEndPos = nEnd; )h_7 2
nThreadID = id; X]U"ru{1q
fileAccessI = new FileAccessI(sName,nStartPos);//定位 4eL54).1O
} >@"3Q`
o\;"|O}
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public void run() !_H8Q}a
{ tSc>@Q_|
while(nStartPos < nEndPos && !bStop) A6 y~_dt
{ C"Q=(3
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try{ Yn]yd1
URL url = new URL(sURL); I+j|'=M
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); 4\SBf\ c
httpConnection.setRequestProperty("User-Agent","NetFox"); )F#<)Evw
String sProperty = "bytes="+nStartPos+"-"; r2F
httpConnection.setRequestProperty("RANGE",sProperty); t,1! `/\
Utility.log(sProperty); qb&NS4#
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InputStream input = httpConnection.getInputStream(); .Jat^iFj0
//logResponseHead(httpConnection); y_4krY|Zx
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byte[] b = new byte[1024]; s.I1L?s1w?
int nRead; K9O,7h:x
while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) BOiz ~h6
{ NuS|X
nStartPos += fileAccessI.write(b,0,nRead); iraRB~
//if(nThreadID == 1) h[ZN >T
// Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); 0B$7S,2
} EfBVu
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Utility.log("Thread " + nThreadID + " is over!"); JfP\7
bDownOver = true; _`X#c-J
//nPos = fileAccessI.write (b,0,nRead); @U
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} Y0u'@l_[F
catch(Exception e){e.printStackTrace ();} m~j\?mb{+
} l@Eq|y,
} Ij6Wz.*
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//打印回应的头信息
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public void logResponseHead(HttpURLConnection con) X#kjt)W
{ `l gjw=
for(int i=1;;i++) ,y8I)+
{ rTsbP40
String header=con.getHeaderFieldKey(i); ^`jZKh8)h
if(header!=null) |DFvZ6}
//responseHeaders.put(header,httpConnection.getHeaderField(header)); H?`)[#
Utility.log(header+" : "+con.getHeaderField(header)); QLB1:O>
else # +QWi0B
break; -#S)}NEn
} C7jc 6(>m
} yK&*,J
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public void splitterStop() s=nVoc{Yt
{ /[20e1 w!
bStop = true; gP%|:"
} X@yr$3vC
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} `dgM|.w5=
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/* ib(>vp$V
**FileAccess.java L8bI0a]r"*
*//文件访问(定位,写) _^6|^PT.
package NetFox; ]<8B-D?Z
import java.io.*; @@%i(>4Z
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public class FileAccessI implements Serializable{ jF38kj3O7
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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 HBh` 2Q
RandomAccessFile oSavedFile; f=:3! k,S
long nPos; 1jH7<%y
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public FileAccessI() throws IOException Gh]_L+
{ )YzH k ;(
this("",0); \Y!T>nWn)I
} *<*0".#
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public FileAccessI(String sName,long nPos) throws IOException Si?$\H*:
{ a
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oSavedFile = new RandomAccessFile(sName,"rw"); ]Q6+e(:~ZH
this.nPos = nPos; )p$\gwr=2
oSavedFile.seek(nPos); QU^/[75Ea0
} *2JH_Cj`
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public synchronized int write(byte[] b,int nStart,int nLen) I86e&"40
{ "s F Xl
int n = -1; e#>tM
try{ iD>G!\&