/* oWL_Hh%-f`
**SiteFileFetch.java tnaFbmp
*/ 'St6a*
package NetFox; &:g:7l]g
import java.io.*; 3PGAUQR#"q
import java.net.*; }a$.ngP
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public class SiteFileFetch extends Thread { +x=)Kp>
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SiteInfoBean siteInfoBean = null; //文件信息Bean l@Vv%w9H
long[] nStartPos; //开始位置 '"fJA/O
long[] nEndPos; //结束位置 V-}}?c1 F
FileSplitterFetch[] fileSplitterFetch; //子线程对象 gr SF}y!3
long nFileLength; //文件长度 !CWe1Dm
boolean bFirst = true; //是否第一次取文件 @2/|rq
boolean bStop = false; //停止标志 nq]6S$3
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File tmpFile; //文件下载的临时信息 >4jE[$p]"
DataOutputStream output; //输出到文件的输出流 Q0Ft.b
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//负责整个文件的抓取,控制内部线程(FileSplitterFetch类) N
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public SiteFileFetch(SiteInfoBean bean) throws IOException a&x:_vv
{ &jHsFS
siteInfoBean = bean; U_(>eVi7F
//tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); s:}? rSI
tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); Sy|GM~
if(tmpFile.exists ()) ![\-J$
{ \4q|Qno8
bFirst = false; )Xjn:
read_nPos(); _ \6v@
} xKG7d8=
else M_};J;
{ (c(F1=K
nStartPos = new long[bean.getNSplitter()]; x/umwT,o v
nEndPos = new long[bean.getNSplitter()]; 4u6 FvN
} ::oFL#+
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} v
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public void run() 2bNOn%!
{ HeAXZA,
//获得文件长度 LpU}.
//分割文件 Q v9q~l
//实例FileSplitterFetch 3F2IL)Hn
//启动FileSplitterFetch线程 'RMUjJ-!
//等待子线程返回 ^)Hf%
try{ %+(AKZu:
if(bFirst) D*%am|QL
{ :Z//
nFileLength = getFileSize(); ( 2HM"Pd
if(nFileLength == -1) .>B'oD
{ N `|A
System.err.println("File Length is not known!"); KS$t
} u#@/^h;
else if(nFileLength == -2) VGV-t
{ $N=&D_Q
System.err.println("File is not access!"); t )zd'[
} D~6[C:m
else I\.|\^
{ zqeQ
for(int i=0;i<nStartPos.length;i++) 86r"hy~
{ k&dXK
nStartPos = (long)(i*(nFileLength/nStartPos.length)); egaX[j r
} }%_|k^t
for(int i=0;i<nEndPos.length-1;i++) ~rb0G*R>
{ |p6d]#z3
nEndPos = nStartPos[i+1]; V.GM$
} -+*h'zZ[<w
nEndPos[nEndPos.length-1] = nFileLength; i HD!v7d7
} KZppQ0
} #rlgeHG!fs
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//启动子线程 f7=MgFi
fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; C*Vm}|)
for(int i=0;i<nStartPos.length;i++) URsx>yx
{ ]cp b;UfM
fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), }_D .Hy5
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), QQl.5'PP
nStartPos,nEndPos,i); cJo%j -AM
Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); -r\jIO_
fileSplitterFetch.start(); "V|Rq]_+%
} UQl?_[G
// fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), Q0xO;20
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); C]ss'
// Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", yYCS-rF>
nEndPos = " + nFileLength); 8}'iEj^e
// fileSplitterFetch[nPos.length-1].start(); qOo4T@t3
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//等待子线程结束 7
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//int count = 0; Sy8t2lk
//是否结束while循环 !l'nX
boolean breakWhile = false; Px_8lB/;
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while(!bStop) :\;9y3
{ ,
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write_nPos(); ?@"@9na
Utility.sleep(500); 6r~9$IM
breakWhile = true; B7\4^6Tx
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for(int i=0;i<nStartPos.length;i++) j7P49{
{ lS=YnMs6a
if(!fileSplitterFetch.bDownOver) :w^:Z$-hf
{ 3p#UEH3
breakWhile = false; x?Sx cQP
break; ().C
} MfQ0O?oBp
} 2"6L\8hd2
if(breakWhile) c^|8qvS$
break; sUF$eVAT
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//count++; ZcA"HD%
//if(count>4) Ec7xwPk
// siteStop(); *JOK8[Qn
} ]yOM
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System.err.println("文件下载结束!"); HG7Qdw2+O
} ihkZs3}
catch(Exception e){e.printStackTrace ();} h#zm+( [B*
} zfU Do`V~
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//获得文件长度 hTBJ\1
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public long getFileSize() q;SD+%tI
{ &tOo[U?
int nFileLength = -1; !+$qSD,%x
try{ i7H([b<_m
URL url = new URL(siteInfoBean.getSSiteURL()); c:${qY:!
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); Wi$?k{C
httpConnection.setRequestProperty("User-Agent","NetFox"); 6UIS4_
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int responseCode=httpConnection.getResponseCode(); $(&uaDYv
if(responseCode>=400) ~Dg:siw
{ Z@q1&}D!
processErrorCode(responseCode); .UxkTads
return -2; //-2 represent access is error }ll&EB
} ,5 ,r.
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String sHeader; hbXm Ist
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for(int i=1;;i++) s\.r3U&6
{ 2zo>`;l
//DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); c%<81Y=
//Utility.log(in.readLine()); , wk}[MF
sHeader=httpConnection.getHeaderFieldKey(i); hj=n;,a9
if(sHeader!=null) covCa )kf
{ z%fjG} z
if(sHeader.equals("Content-Length")) i(rYc
{ ?(s9dS,7wZ
nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); Jn(|.eT|
break; O-AC$C[d
} aeMj4|{\
} E:}s6l
else Njo.-k
break; L `2{H%J`
} dsEvpa$?
} F, =WfM\
catch(IOException e){e.printStackTrace ();} xqT} 9,
catch(Exception e){e.printStackTrace ();} b#709VHm
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Utility.log(nFileLength); 6hcs)X7m
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return nFileLength; N]BH6 7<
} w&U28"i>
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//保存下载信息(文件指针位置) 5G<`c
private void write_nPos() *<9M|H~
{ SOD3MsAK
try{ 1\TkI=N3
output = new DataOutputStream(new FileOutputStream(tmpFile)); B
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output.writeInt(nStartPos.length); c3fd6Je5
for(int i=0;i<nStartPos.length;i++) x}C$/ 7^
{ (>Sy,
// output.writeLong(nPos); 1\jj3Y'i'
output.writeLong(fileSplitterFetch.nStartPos); $SLyI$<gP
output.writeLong(fileSplitterFetch.nEndPos); [CnoMN
} ubl
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output.close(); j%!xb><
} IFSIQ
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catch(IOException e){e.printStackTrace ();} 0s4]eEXH
catch(Exception e){e.printStackTrace ();} gYL#} ) g
} &S^a_L:
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//读取保存的下载信息(文件指针位置) GyE5jh2
private void read_nPos() dDe$<g5L4
{ qE^u{S4Z@
try{ 8LtkP&Wx
DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); Lz-(1~o
int nCount = input.readInt(); 17rg!'+
nStartPos = new long[nCount]; 5Shc$Awc!
nEndPos = new long[nCount]; (i)O@Jve
for(int i=0;i<nStartPos.length;i++) \a:-xwUu<
{ u_=>r_J[b
nStartPos = input.readLong(); t-FrF </0
nEndPos = input.readLong(); \n0Gr\:
} ZYl*-i&~?
input.close(); QswFISch
} uCFpH5>
catch(IOException e){e.printStackTrace ();} 'kCr1t
catch(Exception e){e.printStackTrace ();} *xKY>E+
} f<DqA/$
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private void processErrorCode(int nErrorCode) M/6q
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{ `?"[u"*
System.err.println("Error Code : " + nErrorCode); *=QWx[K|
} U_0"1+jbq
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//停止文件下载 &-.2P!t
public void siteStop() !"^//2N+,
{ +_fxV|}P
bStop = true; kEdAt5/U{
for(int i=0;i<nStartPos.length;i++) 62OZj%CXN
fileSplitterFetch.splitterStop(); &ZPyZj
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} gDsb~>rb|
} /9u12R*<
//负责部分文件的抓取 \g;-q9g;O
**FileSplitterFetch.java [M.!7+$o
*/ _%aJ/Y0Cy
package NetFox; P_c9v/
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import java.io.*; z!\)sL/"
import java.net.*; &q[`lIV, L
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public class FileSplitterFetch extends Thread { ~LN
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String sURL; //File URL ~d6zpQf7>
long nStartPos; //File Snippet Start Position y[:xGf]8@
long nEndPos; //File Snippet End Position #ruL+-8!<
int nThreadID; //Thread's ID +,ZQ(
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boolean bDownOver = false; //Downing is over z)y{(gR
boolean bStop = false; //Stop identical (ft$ R?
FileAccessI fileAccessI = null; //File Access interface [,ns/*f3R
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public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException Hk|wO:7Be
{ g~$cnU
this.sURL = sURL; GZqy.AE,
this.nStartPos = nStart; xrl!$xE
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this.nEndPos = nEnd; b\Gw|?Rv
nThreadID = id; DlbNW& V
fileAccessI = new FileAccessI(sName,nStartPos);//定位 w57D qG>
} L(qQ,1VY
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public void run() Wi{ jC?2Q
{ EJ`"npU
while(nStartPos < nEndPos && !bStop) wtnC^d$
{ Bgj^n{9x
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try{ a{7'qmN1
URL url = new URL(sURL); V17SJSC-
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); $4&e{fLt|v
httpConnection.setRequestProperty("User-Agent","NetFox"); Vu_QwWXO
String sProperty = "bytes="+nStartPos+"-"; ;sn]Blpq
httpConnection.setRequestProperty("RANGE",sProperty); S U$U
Utility.log(sProperty); leJ\
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InputStream input = httpConnection.getInputStream(); N3g\X
//logResponseHead(httpConnection); 5ki<1{aVtZ
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byte[] b = new byte[1024]; +&h<:/ V
int nRead; vCS D1~V_
while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) P<A_7Ho
{ /V@9!
nStartPos += fileAccessI.write(b,0,nRead); R<n'v.~"A
//if(nThreadID == 1) xF8^#J6>
// Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); m_g2Cep
} Sr?2~R0&
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Utility.log("Thread " + nThreadID + " is over!"); i j+)U`
bDownOver = true; L1J~D?q
//nPos = fileAccessI.write (b,0,nRead); &;]KntxB
} Doj>Irj?7
catch(Exception e){e.printStackTrace ();} U sS"WflB
} YA[\|I33
} V 0M&D,
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//打印回应的头信息 !5XH.DYq!
public void logResponseHead(HttpURLConnection con) +l) [A{
{ jC}2>_#m(
for(int i=1;;i++) eN{ewn#0.
{ #<*=) [
String header=con.getHeaderFieldKey(i); VY|'7in"M
if(header!=null) D@
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//responseHeaders.put(header,httpConnection.getHeaderField(header)); ?)V?6"fFP
Utility.log(header+" : "+con.getHeaderField(header)); DO{Lj#@
else |Jpi|'
break; tR`^c8gD
} UOYhz.
} [wv;CUmgc
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public void splitterStop() %("WoBPH`
{ cfhiZ~."T
bStop = true; ' |Ia-RbX
} G'IRqO*]
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} s9F{UN3
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/*
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**FileAccess.java G{]tB w
*//文件访问(定位,写) >\4"k4d}
package NetFox; sX[k}=HCK
import java.io.*; (t_%8Eu
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public class FileAccessI implements Serializable{ q>f|1Pf
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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 ,0\Pr
RandomAccessFile oSavedFile; mZ0'-ax
long nPos; BBDt^$
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public FileAccessI() throws IOException |{ TVW
{ %@'[g]hk
this("",0); wrm
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} (,^jgv|I
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public FileAccessI(String sName,long nPos) throws IOException Q/]t$
{ u{8:VX
oSavedFile = new RandomAccessFile(sName,"rw"); wn/Y5
this.nPos = nPos; #,CK;h9jy!
oSavedFile.seek(nPos); AR3v,eOs
} ;/ASl<t,
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public synchronized int write(byte[] b,int nStart,int nLen) uy rS6e0
{ nA#N ,^Rr
int n = -1; sh)[|?7z
try{ oef]
oSavedFile.write(b,nStart,nLen); )MeeF-Ad6
n = nLen; /pQUu(~h_
} Ef\&