/* jN[P$}#b`
**SiteFileFetch.java F'~\!dNL
*/ Fv| )[>z0
package NetFox; 2LO8SJ#
import java.io.*; I34|<3t$
import java.net.*; t<F*ODn
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public class SiteFileFetch extends Thread { <"GgqyRzv
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SiteInfoBean siteInfoBean = null; //文件信息Bean 3PLYC}Jq
long[] nStartPos; //开始位置 PVC Fh$pnw
long[] nEndPos; //结束位置 q(Q$lRj/I-
FileSplitterFetch[] fileSplitterFetch; //子线程对象 yi29+T7j4S
long nFileLength; //文件长度 UrMEL;@g
boolean bFirst = true; //是否第一次取文件 n+'gVEBA
boolean bStop = false; //停止标志 IqA'Vz,lL
File tmpFile; //文件下载的临时信息 b.N$eJlQ&
DataOutputStream output; //输出到文件的输出流 Oq`CK f
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//负责整个文件的抓取,控制内部线程(FileSplitterFetch类) 6Z}8"VJr {
public SiteFileFetch(SiteInfoBean bean) throws IOException ,8tk]W[C
{ efT@A}sV
siteInfoBean = bean; _~QiQDq
//tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); 8q}955Nl
tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); 4X}.aZO&b
if(tmpFile.exists ()) =._V$:a6o
{ ~W>3EJghR,
bFirst = false; A$7j B4
read_nPos(); ;4%Co)Rw
} 3J3Yt`
else q6]T;)U&
{ 9I|D"zXn
nStartPos = new long[bean.getNSplitter()]; pO_$ 8=G+
nEndPos = new long[bean.getNSplitter()]; ;h7W(NO~z
} hI$IBf>
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} Pg''>6w>
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public void run() vWs#4JoG
{ ` P,-NVB
//获得文件长度 O>KrTK-AV
//分割文件 x+Ws lN2a
//实例FileSplitterFetch CVAX?c{
//启动FileSplitterFetch线程 2]UwIxzR
//等待子线程返回 r.JM!x8
try{ p0|PVn.^h
if(bFirst) _w.H]`C!X
{ u6t%*''
nFileLength = getFileSize(); l^cz&k=+
if(nFileLength == -1) 9OS~;9YR
{ Hz>_tA"^T
System.err.println("File Length is not known!"); "XB6k0.#
} o..iT:f;n
else if(nFileLength == -2) L!c.1Rf_
{ \z8j6 h
System.err.println("File is not access!"); F*Y]^9]
} -T8'|"g
else 0^25uAD=
{ _kZ&t_]
for(int i=0;i<nStartPos.length;i++) G'<Ie@$6l
{ <1pRAN0
nStartPos = (long)(i*(nFileLength/nStartPos.length)); HYwtGj~5
} 4;|@eN
for(int i=0;i<nEndPos.length-1;i++) d(_;@%p1X
{ j9d^8)O,
nEndPos = nStartPos[i+1]; 03?7kAI
} J?$`Tnx^
nEndPos[nEndPos.length-1] = nFileLength; x,fX mgE
} #trb4c{{5
} ;uhpo
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//启动子线程 UfNcI[xr
fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; Njmb{L]Cps
for(int i=0;i<nStartPos.length;i++) :5-t$^R
{ ;39~G T
fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), +UX~TT:
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), Htm;N2$d
nStartPos,nEndPos,i); qCI0[U@
Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); #ULzh&yO
fileSplitterFetch.start(); b(Nxk2uv
} peZ'sZ 6
// fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), *G"}m/j-
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); NcyE_T
// Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", i$g6C
nEndPos = " + nFileLength); \!Wph5wA
// fileSplitterFetch[nPos.length-1].start(); zLSha\X
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//等待子线程结束 \B
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//int count = 0; !F08F>@D
//是否结束while循环 l,k.Jo5
boolean breakWhile = false; aE2Yl
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while(!bStop) WxJV
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{ El^V[s'3
write_nPos(); +ZJ1> n
Utility.sleep(500); >*1YL)DBT\
breakWhile = true; QD;:!$Du
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for(int i=0;i<nStartPos.length;i++) e% #?B
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{ ?2<V./2F
if(!fileSplitterFetch.bDownOver)
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{ A(1WQUu j
breakWhile = false; M=sGPPj
break;
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} |H'wDw8
} H03R?S9AQ
if(breakWhile)
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break; *EF`s~
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//count++; 2rrC y C
//if(count>4) X_ (n
// siteStop(); jMP;$w
} IQyw>_~]
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System.err.println("文件下载结束!"); DoFF<LXBt
} W0LJXp-v
catch(Exception e){e.printStackTrace ();} |5(un/-C
} bmw"-W^U[
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//获得文件长度 p&lT! 5P!A
public long getFileSize() PcEE@W9
{ ,F?O} ijk
int nFileLength = -1; ;tWi4iT+.
try{ _53NuEM1
URL url = new URL(siteInfoBean.getSSiteURL()); K[[ 5H
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); wF)g@cw
httpConnection.setRequestProperty("User-Agent","NetFox"); t/c)[l hV
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int responseCode=httpConnection.getResponseCode(); '&F
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if(responseCode>=400) -f=4\3y3p
{ d$PQb9Q+f
processErrorCode(responseCode); Df}3^J~JX
return -2; //-2 represent access is error "[2D&\$
} znNv;-q
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String sHeader; DC,]FmWs!+
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for(int i=1;;i++) PHg(O:3WG
{ o(Q='kK
//DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); */ok]kX'
//Utility.log(in.readLine()); 43/!pW
sHeader=httpConnection.getHeaderFieldKey(i); BF(Kaf;<t.
if(sHeader!=null) SAUG+{Uq
{ dk@iAL*v
if(sHeader.equals("Content-Length")) Rqun}v}
{ [OwrIL
nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); f4+}k GJN
break; zF_aJ+i:~
} 86ml.VOR
} )"&\S6*!
else .!Q?TSQ+{!
break; "/zDcZbL;
} Kc{~Q
} 4 moVS1
catch(IOException e){e.printStackTrace ();} Wf9K+my
catch(Exception e){e.printStackTrace ();} kg()C%#u
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Utility.log(nFileLength); DTM
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return nFileLength; !K/zFYl
} z1~FE
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//保存下载信息(文件指针位置) k4BiH5\hA
private void write_nPos() Kv#TJn
{ $6yr:2Xvt
try{ <dX7{="&
output = new DataOutputStream(new FileOutputStream(tmpFile)); ZO!)G
output.writeInt(nStartPos.length); zXT[}J VV
for(int i=0;i<nStartPos.length;i++) _|KeB(W
{ )!C|DSw
// output.writeLong(nPos); (#VF>;;L
output.writeLong(fileSplitterFetch.nStartPos); Bt1&C?_$T
output.writeLong(fileSplitterFetch.nEndPos); "(^1Dm$(
} Iw;J7[hJ&$
output.close(); Avo"jN*<d
} M{M?#Q
catch(IOException e){e.printStackTrace ();} =RQ\i6Y
catch(Exception e){e.printStackTrace ();} uJ>_
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} = ms
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//读取保存的下载信息(文件指针位置) 6)Dp2
private void read_nPos() '/K-i.8F
{ Tz 2<# pLR
try{ JnBg;D|)@
DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); y3)R:h4AH
int nCount = input.readInt(); e!|T Tap
nStartPos = new long[nCount]; 6>;dJV
nEndPos = new long[nCount]; x2 m
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for(int i=0;i<nStartPos.length;i++) Odj4)
{ o _DZ
nStartPos = input.readLong(); "T'?Ah6
nEndPos = input.readLong(); 'X1fb:8m8
} `B7 1 `
input.close(); cb9q0sdf
} Q.`O;D}x
catch(IOException e){e.printStackTrace ();} 09C[B+>h
catch(Exception e){e.printStackTrace ();} 8A3!XA
} eWwI@ASaA
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private void processErrorCode(int nErrorCode) !mtX*;b(e
{ *Wmn!{\g
System.err.println("Error Code : " + nErrorCode); tx01*2]pX
} RB `<Zw
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//停止文件下载 VLfE3i4Vwl
public void siteStop() )4/227b/(
{ @Zd/>'
bStop = true; ZsikI@?
for(int i=0;i<nStartPos.length;i++) CkA
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fileSplitterFetch.splitterStop(); 4Js9"<w
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} YQk<1./}I
} -jOCzp
//负责部分文件的抓取 >"q~9b
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**FileSplitterFetch.java .}zpvr8YP
*/ M,nLPHgK
package NetFox; e.:S BXZ
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import java.io.*; 9x0Ao*D<t
import java.net.*; 60u}iiC@
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public class FileSplitterFetch extends Thread { *K1GX
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String sURL; //File URL ]jL`*tI\S
long nStartPos; //File Snippet Start Position 3d0Yq
long nEndPos; //File Snippet End Position a;$'A[hq
int nThreadID; //Thread's ID dJ0qg_ U&
boolean bDownOver = false; //Downing is over M&5;Qeoiv
boolean bStop = false; //Stop identical y8.(filNB
FileAccessI fileAccessI = null; //File Access interface ,awp)@VG7
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public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException KoPhPH
{ `]xot8
this.sURL = sURL; v<qiu>sbz}
this.nStartPos = nStart;
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this.nEndPos = nEnd; EL[N%M3
nThreadID = id; 9O/l{
fileAccessI = new FileAccessI(sName,nStartPos);//定位 M;i4ss,}!
} z
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public void run() + ^9;<>P
{ i+z;tF`
while(nStartPos < nEndPos && !bStop) 0$9I.%4jAJ
{ CdN,R"V0$@
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try{ K(M@#t1_&
URL url = new URL(sURL); &sRjs
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); V\V:uo(C
httpConnection.setRequestProperty("User-Agent","NetFox"); ]EzX$T
String sProperty = "bytes="+nStartPos+"-"; 'r5[tK}
httpConnection.setRequestProperty("RANGE",sProperty); m8|&z{
Utility.log(sProperty); )@]Y1r4U
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InputStream input = httpConnection.getInputStream(); +'NiuN
//logResponseHead(httpConnection); @fH?y Z=>
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byte[] b = new byte[1024]; 'e(`2
int nRead; ?*~Pgh >uL
while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) .7HnWKUV
{ x>@+lV'O
nStartPos += fileAccessI.write(b,0,nRead); 2_4m}T3
//if(nThreadID == 1) &@dWd
// Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); &x(^=sTHI
} J6H3X;vxQw
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Utility.log("Thread " + nThreadID + " is over!"); 7Lr}Y/1=
bDownOver = true; $^2 j#]uX
//nPos = fileAccessI.write (b,0,nRead); T&2aNkuG
} 2_ x~y|<9
catch(Exception e){e.printStackTrace ();} MO{6B#(<F
} Ij_VO{]G'l
} VS#i>nlT
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# Z*nc0C
//打印回应的头信息 4K@`>Y5g*
public void logResponseHead(HttpURLConnection con) Z81{v<c;
{ ]byj[Gd
for(int i=1;;i++) q >9F21 W
{ aeESS;JxJj
String header=con.getHeaderFieldKey(i); A|BvRZd
if(header!=null) K%: :
//responseHeaders.put(header,httpConnection.getHeaderField(header)); LW;UL}av
Utility.log(header+" : "+con.getHeaderField(header)); E6-alBi%
else ZU&I`q|Y6
break; ?^F#}>C
} 1f 0"z1
} G}tq'#]E{z
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public void splitterStop() -L/5Nbup
{ Sdc;jK 9d!
bStop = true; $+Hv5]/hb
} 5Dy800.B2
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} 2w=0&wG4K
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/* `A\
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**FileAccess.java y?-wjJS>
*//文件访问(定位,写) T|p$Ddt`+
package NetFox; 'iN8JO>
import java.io.*; 877>=Tp|
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* xs8/?
public class FileAccessI implements Serializable{ Ed|7E_v
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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 xA nAW
RandomAccessFile oSavedFile; g]C+uj^
long nPos; GA6)O-^G
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public FileAccessI() throws IOException $-VW)~Sl
{ SvH=P!`+
this("",0); E'LkoyI
} l}X3uyS
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public FileAccessI(String sName,long nPos) throws IOException F!VC19<1O8
{ 17G7r\iNYq
oSavedFile = new RandomAccessFile(sName,"rw"); $Q|66/S^
this.nPos = nPos; Nuk\8C
oSavedFile.seek(nPos); FuaGr0]
} |pr~Ohz
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public synchronized int write(byte[] b,int nStart,int nLen) `3r *Ae
{ p&bQ_ XOH
int n = -1; 4qjY,QJ
try{ G%anot
oSavedFile.write(b,nStart,nLen); 9VIsLk54^
n = nLen; ;W#G<M&n'
} x>5#@SX
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catch(IOException e) Hux#v>e
{ 8T
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e.printStackTrace (); 3}$L4U
} ltHC+8aZ
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return n; ?S!lX[#v
} F1?@tcr'
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