/* 0`Qs=R`OM
**SiteFileFetch.java r
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*/ iQR})=Q
package NetFox; Fi=8B&j
import java.io.*; jM@I"JZb
import java.net.*; 2"K~:Tm#w
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public class SiteFileFetch extends Thread { (c7{dYV
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SiteInfoBean siteInfoBean = null; //文件信息Bean p2?+[d
long[] nStartPos; //开始位置 zi 14]FWo
long[] nEndPos; //结束位置 uUB%I 8
FileSplitterFetch[] fileSplitterFetch; //子线程对象 8[p6C Jl)
long nFileLength; //文件长度 !8M'ms>s=
boolean bFirst = true; //是否第一次取文件 'WgwLE_
boolean bStop = false; //停止标志 ,>%r|YSJ)
File tmpFile; //文件下载的临时信息 *iN]#)3>
DataOutputStream output; //输出到文件的输出流 /9#jv]C:
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//负责整个文件的抓取,控制内部线程(FileSplitterFetch类) ^/YAokj
public SiteFileFetch(SiteInfoBean bean) throws IOException 6Z}))*3 9
{ QlXF:Gx"=
siteInfoBean = bean;
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//tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); gV>\lMc[-%
tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); i-W2!;G
if(tmpFile.exists ()) $1
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{ 'bO? =+c
bFirst = false; 8LKZ3Y|
read_nPos(); !|QeYGnq6
} [uV/ Ra*g
else No|{rYYKK
{
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nStartPos = new long[bean.getNSplitter()];
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nEndPos = new long[bean.getNSplitter()]; zNs8\
} X~4:sJ\P=
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} DKCy h`
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public void run() gJv^v`X
{ {vlh,0~
//获得文件长度 Oz7v
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//分割文件 8TvPCZ$x
//实例FileSplitterFetch i kiy>W8
//启动FileSplitterFetch线程 A84HaRlkF5
//等待子线程返回 aN3{\^
try{ {q4"x5|
if(bFirst) &zy9} 4w,
{ 6K0*?j{;"
nFileLength = getFileSize(); A1;t60z+q>
if(nFileLength == -1) nClU5
{ =Z$6+^L
System.err.println("File Length is not known!"); >D aS*r
} zvj >KF|y
else if(nFileLength == -2) Vs{sB*:
{ V(0[QA
System.err.println("File is not access!"); Or|LyQU
} )G gx
else gJ7puN
{ ;zG|llX
for(int i=0;i<nStartPos.length;i++) o(qmI/h
{ "j>0A
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nStartPos = (long)(i*(nFileLength/nStartPos.length)); \H(,'w7H
} +w5?{J
for(int i=0;i<nEndPos.length-1;i++) 2>s;xZ@/'R
{ }@4*0_g"Aw
nEndPos = nStartPos[i+1]; ?[">%^
} 5gEK$7Vp
nEndPos[nEndPos.length-1] = nFileLength; vX%gcs/@
} ZQ/5]]}3y
} $!@f{9+
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//启动子线程 O}V2>W$
fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; h]$zub
for(int i=0;i<nStartPos.length;i++) WI3!?>d
{ "bH ~CG:Y
fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), q<7n5kJ~
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), 2{N0. |5
nStartPos,nEndPos,i); `rV,<
Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); | <$O5b'
fileSplitterFetch.start(); kA0^~
} Lf9h;z>#
// fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), +\Q@7Lj
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); f*Bc`+G
// Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", Ek0.r)Nw
nEndPos = " + nFileLength); {n'}S(
// fileSplitterFetch[nPos.length-1].start(); bE"CSK#
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//等待子线程结束 ?`$4ZDM
//int count = 0; z_)$g=9$
//是否结束while循环 +L6$Xm5DAv
boolean breakWhile = false; ly@CX((W
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while(!bStop) #96a7K
{ Y*f<\z(4
write_nPos(); LTHS&3%2
Utility.sleep(500); S;~_9i]upe
breakWhile = true; I%Z&i-33y
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for(int i=0;i<nStartPos.length;i++) vvC GzOv
{ B7;MY6h#
if(!fileSplitterFetch.bDownOver) " B1' K8
{ )uP= o
breakWhile = false; b3H;Ea?^^<
break; *:(t.iL
} $fKWB5p|()
} kQ+5pFo3
if(breakWhile) HZNX1aQ|Q#
break; gqG"t@Y+
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//count++; QHK$
//if(count>4) YeVhWPn@
// siteStop(); \JchcQ
} n$QFj'
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System.err.println("文件下载结束!"); w&H7S{
} ,ic}
catch(Exception e){e.printStackTrace ();}
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} )I@iW\`7
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//获得文件长度 _>.%X45xi
public long getFileSize() (,>`\\
{ bc-"If Z&
int nFileLength = -1; H;8(y4;
try{ Qk=
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URL url = new URL(siteInfoBean.getSSiteURL()); W+vm!7wX0
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); iBQf tq7
httpConnection.setRequestProperty("User-Agent","NetFox"); /e}k7U,^
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int responseCode=httpConnection.getResponseCode(); (@ Bw@9
if(responseCode>=400) Wo&i)S<i0F
{ %zGPF
processErrorCode(responseCode); h!MT5B)r.
return -2; //-2 represent access is error ETtR*5Y 5
} w[XW>4xK
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String sHeader; tB[K4GNSQ
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for(int i=1;;i++) V+ Z22
{ Uvp?HZ\Z
//DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); `&o|=
//Utility.log(in.readLine()); 'EQAG' YV
sHeader=httpConnection.getHeaderFieldKey(i); =vWnqF:
if(sHeader!=null) ^U1;5+2G+~
{ shD$,!
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if(sHeader.equals("Content-Length")) >z2{D7
{ -v:Y\=[\
nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); *m7e>]-
break; ZISR]xay
} UCQL~
} ,AJd2i x
else @U}UC G7+
break; ny}?+&K
} wGB'c's*
} ^m~=<4eX
catch(IOException e){e.printStackTrace ();} C]k\GlhB
catch(Exception e){e.printStackTrace ();} >U17BGJ.
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Utility.log(nFileLength); 8n56rOW!
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return nFileLength; @{bf]Oc
} ,yC~{H
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//保存下载信息(文件指针位置) _*+M'3&=
private void write_nPos() pG
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{ vO\CPb
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try{ FIuKX"XR
output = new DataOutputStream(new FileOutputStream(tmpFile)); Gce![<|ph
output.writeInt(nStartPos.length); :%0Z
for(int i=0;i<nStartPos.length;i++) U_:/>8})d
{ d00r&Mc
// output.writeLong(nPos); 9O|m#&wa]
output.writeLong(fileSplitterFetch.nStartPos);
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output.writeLong(fileSplitterFetch.nEndPos); b_B4
} Aam2Y,B
output.close(); v>,XJ 7P
} % $J^dF_0
catch(IOException e){e.printStackTrace ();} -v]7}[
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catch(Exception e){e.printStackTrace ();} Q>|<R[.7
} Dd*C?6
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//读取保存的下载信息(文件指针位置) %rf<YZ.\
private void read_nPos() ^*ZO@GNL
{ 0_ ;-QAd
try{ J^u{7K,
DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); H.YntFtD'
int nCount = input.readInt(); [ [Z*n/tr
nStartPos = new long[nCount]; $+Xohtt
nEndPos = new long[nCount]; J~~WV<6
for(int i=0;i<nStartPos.length;i++) Alrk3I3{
{ zfS`@{;F`|
nStartPos = input.readLong(); H#f
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nEndPos = input.readLong(); ,i'>+Ix<
} ?O28Q DUI
input.close(); |d{4_o90
} ZN.
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catch(IOException e){e.printStackTrace ();} (u~@@d"
catch(Exception e){e.printStackTrace ();} +] FdgmK:
} N^O.P
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private void processErrorCode(int nErrorCode) gI[xOK#
{ .(! $j-B
System.err.println("Error Code : " + nErrorCode); Ygg+*z
} ?8`b
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//停止文件下载 -(Yq$5Zc&
public void siteStop() aC;OFINK
{ y3d`$'7H>
bStop = true; C}7Sh6
for(int i=0;i<nStartPos.length;i++) @xmL?wz
fileSplitterFetch.splitterStop(); 7%C6gU!r
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} B
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} ?xIwQd0
//负责部分文件的抓取 aCQAh[T
**FileSplitterFetch.java "I
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*/ -_B*~M/vV`
package NetFox; &kh-2#E
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import java.io.*; K1jE_]@Z
import java.net.*; iOw'NxmY
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public class FileSplitterFetch extends Thread { L_Z>*s&
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String sURL; //File URL L )kwMk
long nStartPos; //File Snippet Start Position ?nE<Aig
long nEndPos; //File Snippet End Position uq'T:d
int nThreadID; //Thread's ID A3MVNz$wo"
boolean bDownOver = false; //Downing is over 86oa>#opU
boolean bStop = false; //Stop identical ?m0|>[j
FileAccessI fileAccessI = null; //File Access interface Nvw'[?m
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public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException CnN PziB
{ "luMz;B
this.sURL = sURL; uvi+#4~G
this.nStartPos = nStart; ,-D3tleu`
this.nEndPos = nEnd; `StlG=TB8
nThreadID = id; T=%,^
fileAccessI = new FileAccessI(sName,nStartPos);//定位 it \3-
} oUoDj'JN{
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public void run() |<gYzbq
{ V_^p?Fi#
while(nStartPos < nEndPos && !bStop) M]
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{ /GRkQ",
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try{ ^z)p@sk#
URL url = new URL(sURL); t[VA|1gG
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); '| WY 2>/(
httpConnection.setRequestProperty("User-Agent","NetFox"); ,#m:U5#h
String sProperty = "bytes="+nStartPos+"-"; {W,&jC
httpConnection.setRequestProperty("RANGE",sProperty); *d b,N'rK
Utility.log(sProperty); fgdqp8~
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InputStream input = httpConnection.getInputStream(); \xR1|M
//logResponseHead(httpConnection); /6 QwV->
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byte[] b = new byte[1024]; $b OiP
int nRead; 3RJsH:u8
while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) vq/3a
{ (l}W\iB'd
nStartPos += fileAccessI.write(b,0,nRead); /fv;`?~d*
//if(nThreadID == 1) #TS:|=
// Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); \SKobO?qI
} @L0xU??"|
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Utility.log("Thread " + nThreadID + " is over!"); *MC+i$
bDownOver = true; RzhAXI=
//nPos = fileAccessI.write (b,0,nRead); wNl{,aH@
} wwaw|$
catch(Exception e){e.printStackTrace ();} mBN+c9n/
} :J6 xYy$
} $raq,SP
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//打印回应的头信息 RqB 8g
public void logResponseHead(HttpURLConnection con) A{|^_1
{ 17la/7l<
for(int i=1;;i++) ]-g9dV_[>j
{ e|>
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String header=con.getHeaderFieldKey(i); &Ql$7:r
if(header!=null) bY&!d.
//responseHeaders.put(header,httpConnection.getHeaderField(header)); 8n??/VDRl
Utility.log(header+" : "+con.getHeaderField(header)); X)Zc*9XA
else |r['"6
break; XCvL`
} _3%eIyk4T
} uHeKttR-
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public void splitterStop() AdD,94/
{ J~}sQ{ 0
bStop = true; ANWfRtiU#
} z>]P_E~`}
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} R`KlG/Tk
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/* Y#[xX2z9
**FileAccess.java D,\hRQ
*//文件访问(定位,写) T_)G 5a
package NetFox; *(E]]8o
import java.io.*; )s N}ClgJ
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public class FileAccessI implements Serializable{ +R"Y~
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//RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 o4U0kiI@
RandomAccessFile oSavedFile; 8B!MgNKV
long nPos; C&HN#Q_
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public FileAccessI() throws IOException *Za'^ Z2
{ AcP d(Pc
this("",0); ?k`UQi]Q
} 'D'H)J
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public FileAccessI(String sName,long nPos) throws IOException b|pp}il
{ u.ej<Lo
oSavedFile = new RandomAccessFile(sName,"rw"); +\-cf,WkI
this.nPos = nPos; :'2h0
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oSavedFile.seek(nPos); +I3j2u8L
} nT
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public synchronized int write(byte[] b,int nStart,int nLen) ?U+nR/H:6
{ DGbEQiX$\
int n = -1; !?)aZ |r
try{ I;Pd}A_}=_
oSavedFile.write(b,nStart,nLen); yXQ 28A
n = nLen; 6t=)1T
} .WLwAL
catch(IOException e) u-M Td
{ #+&"m7
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e.printStackTrace (); tH=jaFJ
} ZZ>F ^t
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return n; [}I|tb>Pg
} 9zl-C*9vj
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} (QTQxZ
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/* {>UT'fa-
**SiteInfoBean.java .On3ZN
*/ h<G7ocu !
package NetFox; ; GEr8_7
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public class SiteInfoBean { G/ H>M%M
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private String sSiteURL; //Site's URL E|3[$?=R
private String sFilePath; //Saved File's Path </pt($
private String sFileName; //Saved File's Name @HE<\Z{ KI
private int nSplitter; //Count of Splited Downloading File .P#t"oW}
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public SiteInfoBean() 5/R
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{//nSplitter的缺省值为5 O03F@v
//default value of nSplitter is 5 >9y!M'V
this("","","",5); %?3$~d\n
} jx'hxC'3
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public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) dVMLn4[,MA
{ OaKr_m
sSiteURL= sURL; tkQrxa|
sFilePath = sPath; oT|:gih5
sFileName = sName; @~&|BvK% \
this.nSplitter = nSpiltter; 1:RK~_E
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} Wo Z@
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public String getSSiteURL() kZ;Y/DH
{ cqaq~
return sSiteURL; OepQ Z|2
} <sn,X0W
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public void setSSiteURL(String value) tkmzOc H
{ 3e>U(ES
sSiteURL = value; e~SRGyIww
} r)B55;*Fh
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public String getSFilePath() 3lbGG42:
{ WD5jO9Oai
return sFilePath; :)y3&