/* !;{7-~
**SiteFileFetch.java 'sKk"bi;0
*/ m?}6)\ob
package NetFox; o#Dk&
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import java.io.*; "Gzz4D
import java.net.*; pE0Sw}A:9
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public class SiteFileFetch extends Thread { |aS.a&vwR
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SiteInfoBean siteInfoBean = null; //文件信息Bean @b%=H/5\
long[] nStartPos; //开始位置 !>o7a}?
long[] nEndPos; //结束位置 pYEMmZ?L
FileSplitterFetch[] fileSplitterFetch; //子线程对象 rXP,\ ]r+
long nFileLength; //文件长度 8kIksy
boolean bFirst = true; //是否第一次取文件 l|[N42+
boolean bStop = false; //停止标志 )2o?#8J
File tmpFile; //文件下载的临时信息 J]'zIOQ
DataOutputStream output; //输出到文件的输出流 K@]4g49A/j
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//负责整个文件的抓取,控制内部线程(FileSplitterFetch类) v ;{#Q&(
public SiteFileFetch(SiteInfoBean bean) throws IOException EME|k{W
{ d7y[0<xM
siteInfoBean = bean; Ll't>)
//tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); +\]\[6
tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); Bwxd&;E
if(tmpFile.exists ()) Ti5-6%~&
{
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bFirst = false;
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read_nPos(); XRi8Gpg
} {EQOP]
else u*`GiZAO
{ L="}ErmK
nStartPos = new long[bean.getNSplitter()]; wc4=VC"y
nEndPos = new long[bean.getNSplitter()]; h2R::/2.
} gM:".Ee
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} 4tBYR9|
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public void run() ^1.By^
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{ t{{QE:/
//获得文件长度 \4fQMG
//分割文件 5.GR1kl6
//实例FileSplitterFetch 3!]rmZ-W
//启动FileSplitterFetch线程 $!t4r
//等待子线程返回 '`Hr}
try{ JWxwJex
if(bFirst) s$j,9uRr
{ f@!.mDm]
nFileLength = getFileSize(); lThB2/tV\
if(nFileLength == -1) (4nq>;$3
{ #H~64/
System.err.println("File Length is not known!"); |sE'XT4ag
} >hIu2jm
else if(nFileLength == -2) ]Y&VT7+Z
{ 9->if/r,o
System.err.println("File is not access!"); eHUOU>&P]
} r~['VhI!;E
else (E1~H0^
{ 1'Dai `
for(int i=0;i<nStartPos.length;i++) 8}:nGK|kx
{ (ToUgVW1N
nStartPos = (long)(i*(nFileLength/nStartPos.length)); 9\(|
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} 1'8YkhQ2a
for(int i=0;i<nEndPos.length-1;i++)
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{ hhvyf^o
nEndPos = nStartPos[i+1]; JBZ@'8eqi]
} seJ^s@H5l
nEndPos[nEndPos.length-1] = nFileLength; m1A J{cs
} I>$&-i
} aN3;`~{9
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//启动子线程 jebx40TA3
fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; ^iYj[~
for(int i=0;i<nStartPos.length;i++) R4d=S4i
{ |y!A&d=xYn
fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), DtnEi4h,
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), aw> #P
nStartPos,nEndPos,i); I%Z
Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); ,hmL/K0"(5
fileSplitterFetch.start(); <OPArht
} 08{@rOr
// fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), cB&:z)i4
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); QS`]
// Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", poFg1
nEndPos = " + nFileLength); Ek}A]zC
// fileSplitterFetch[nPos.length-1].start(); e96k{C`j0
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//等待子线程结束 ovV'VcUs
//int count = 0; +ck}l2
//是否结束while循环 *8XEYZa
boolean breakWhile = false; |Q>IrT
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while(!bStop) e>7i_4(C
{ Y <qm{e
write_nPos(); "C3/T&F
Utility.sleep(500); WMP,\=6k0
breakWhile = true; <rS F*
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for(int i=0;i<nStartPos.length;i++) 61
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{ OK
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if(!fileSplitterFetch.bDownOver) CVR3
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{ 4nz 35BLr
breakWhile = false; o%*xvH*A
break; tFl"n;~T
} sUm'
} #LN`X8Wz'
if(breakWhile) j1HW._G
break; XBw)H
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//count++; FNId;
//if(count>4) mlS$>O_aX
// siteStop(); Q)z8PQl O
} ]"1DGg \A
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System.err.println("文件下载结束!"); cPc</[x[W
} w:l
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catch(Exception e){e.printStackTrace ();} $
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} jm r"D>
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//获得文件长度 -RK- Fu<e
public long getFileSize() _8agtQ:<
{ U|j`e5)
int nFileLength = -1; ?5 [=(\/.
try{ %GIr&V4|
URL url = new URL(siteInfoBean.getSSiteURL()); mUx+Y ]Ep
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); _2 osV[e
httpConnection.setRequestProperty("User-Agent","NetFox"); ;mKb]
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int responseCode=httpConnection.getResponseCode(); {P#|zp 4C{
if(responseCode>=400) ',5ky{
{ ^D-/`d
processErrorCode(responseCode); n>U5R_T
return -2; //-2 represent access is error U_c *6CK
} QoH6
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String sHeader; .Rf_Cl
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for(int i=1;;i++) 0NX,QD
{ _``=cc
//DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); J`1rJ
//Utility.log(in.readLine()); D*|Bb?
sHeader=httpConnection.getHeaderFieldKey(i); x.R4%Z
if(sHeader!=null) K8Y=S12Ti
{ \mlqO[ S
if(sHeader.equals("Content-Length")) R]*K:~DM
{ OY@ %p}l
nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); P\)iZiGc
break; ijx0gh`~
} (7=9++uU
} n#_$\
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else Vj>8a)"B5a
break; 1|-Dj|
} 8 uwq-/$
} \6*I'|5d
catch(IOException e){e.printStackTrace ();} /FEVmH?
catch(Exception e){e.printStackTrace ();} aPbE;"
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Utility.log(nFileLength); h2;F
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return nFileLength; oIj#>1~c%
} A
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//保存下载信息(文件指针位置) (mt k 4
private void write_nPos() C/6V9;U
{ PdtvU-(
try{
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output = new DataOutputStream(new FileOutputStream(tmpFile)); r#]WI|
output.writeInt(nStartPos.length); 6 3,H{
for(int i=0;i<nStartPos.length;i++) !^Y(^RS@
{ =h73s0]
// output.writeLong(nPos); "d5n \@[t
output.writeLong(fileSplitterFetch.nStartPos); ,f;}|d:r
output.writeLong(fileSplitterFetch.nEndPos); T@&K-UQ
} <<BQYU)Ig
output.close(); n^Au*'
} :+pPrGj"
catch(IOException e){e.printStackTrace ();} :A$wX$H01
catch(Exception e){e.printStackTrace ();} &(\@sxAyZ
} s#Q_Gu
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//读取保存的下载信息(文件指针位置) n1`T#%e
private void read_nPos() <d<RK@2-
{ AuM:2N2
try{ K-Y*T}?
DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); +wjlAqMQ
int nCount = input.readInt(); iDvpXn
nStartPos = new long[nCount]; IHfSkFz`j
nEndPos = new long[nCount]; 0kz7 >v
for(int i=0;i<nStartPos.length;i++) =tP$re";o
{ G32_FQ$b
nStartPos = input.readLong(); H!^C 2
nEndPos = input.readLong(); ~)!VV)
} 6 cr^<]v !
input.close(); v @_?iC"`
} >T$7{
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catch(IOException e){e.printStackTrace ();} <X9T-b"$h
catch(Exception e){e.printStackTrace ();} >fhSaeN
} 7j{Te)"
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private void processErrorCode(int nErrorCode) P|yGx)'^P
{ j `w;z: G
System.err.println("Error Code : " + nErrorCode); y`T--v3mI
} u_hE7#i
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//停止文件下载 _-YL!oP
public void siteStop() LJ:mJ#
{ R'jUS7]Y
bStop = true; {EZFx,@t
for(int i=0;i<nStartPos.length;i++) GC,vQ\
fileSplitterFetch.splitterStop(); B=r]_&u-u
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} V7Vbl?*n
} n$}R/*
//负责部分文件的抓取 r|u6O F>
**FileSplitterFetch.java MxFt;GgE8
*/ V!j K3vc
package NetFox; 58a)&s[+
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import java.io.*; d;*OO xQV
import java.net.*; @+QYWh'
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public class FileSplitterFetch extends Thread { Rh05W_?Js
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String sURL; //File URL
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long nStartPos; //File Snippet Start Position @U 7#, G
long nEndPos; //File Snippet End Position v '"1/% L
int nThreadID; //Thread's ID fwar8
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boolean bDownOver = false; //Downing is over P22y5z~
boolean bStop = false; //Stop identical XSL
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FileAccessI fileAccessI = null; //File Access interface xIq"[?m
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public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException 3thG*^C5
{ c)n0D=
this.sURL = sURL; 7><*
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this.nStartPos = nStart; x3p;H02i\
this.nEndPos = nEnd; %Hl:nT2M
nThreadID = id; _dJVnC1 !
fileAccessI = new FileAccessI(sName,nStartPos);//定位 z_[3IAZ
} m,"cbJ
/
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public void run() k7Be'E
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{ y<Z#my$`|n
while(nStartPos < nEndPos && !bStop) -h^} jP8
{ Jte:l:yjtA
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try{ 66Cj=n5
URL url = new URL(sURL); 04T*\G^:=
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); 2Xq!'NrS
httpConnection.setRequestProperty("User-Agent","NetFox"); VUg~[
String sProperty = "bytes="+nStartPos+"-"; n<Xm%KH.
httpConnection.setRequestProperty("RANGE",sProperty); VE S4x%r=
Utility.log(sProperty); yg]nS<K~4
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InputStream input = httpConnection.getInputStream(); vSHIl"h
//logResponseHead(httpConnection); zdpLAr
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byte[] b = new byte[1024]; lDX&v$
int nRead; lLwQridFXh
while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) <=GzK:4L
{ z6>ZV6(d2^
nStartPos += fileAccessI.write(b,0,nRead); V
n!az}
//if(nThreadID == 1) 6@_@nlA<1
// Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); X7B)jH%N
} Xk9r"RmiOb
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Utility.log("Thread " + nThreadID + " is over!"); F~0%j}ve
bDownOver = true; fKK-c9F
//nPos = fileAccessI.write (b,0,nRead); Z?j='/u>@
} fylA0{
catch(Exception e){e.printStackTrace ();} )V =K#MCK
} ]bU'G$Qm&s
} {p_vR/yN
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//打印回应的头信息 f8_UIdM7
public void logResponseHead(HttpURLConnection con) c+K=pp@
{ kG7,1teMk
for(int i=1;;i++) QRG)~
{ {O,M}0Eg
String header=con.getHeaderFieldKey(i); DP'Dg /D
if(header!=null) ?%fZvpn -
//responseHeaders.put(header,httpConnection.getHeaderField(header)); `m0Uj9)#
Utility.log(header+" : "+con.getHeaderField(header)); 9h0,L/;\
else "Ohpb!J9
break; 3 BhA.o
} v+_Y72h*a
} oX~$'/2v
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public void splitterStop() w\;9&;;
{ (<~R[sT|
bStop = true; v2X0Px_
} _*B~ESC0
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} 7tO$'q*h
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/* ^* v{t?u
**FileAccess.java $P9$ ,w4
*//文件访问(定位,写) f<:SdtG5
package NetFox; naCI55Wx
import java.io.*; &UH z
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public class FileAccessI implements Serializable{ >w;W&[
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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 L"<Eov6
RandomAccessFile oSavedFile; bjX$idL
long nPos; }ucg!i3C
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public FileAccessI() throws IOException qinQ5 t
{ yj9gN}+
this("",0); {!bJ.O
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} ,qqV11P]
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public FileAccessI(String sName,long nPos) throws IOException 6_><W"r:]
{ q)i(wEdUZ
oSavedFile = new RandomAccessFile(sName,"rw"); I<-"J^2
this.nPos = nPos; u;1NhD<n
oSavedFile.seek(nPos); I+Cmj]M s0
} Ci:QIsu*
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public synchronized int write(byte[] b,int nStart,int nLen)
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{ &<