/* Cb
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**SiteFileFetch.java =EQaZ8k
*/ +8Q5[lh2]j
package NetFox; |rL#HG
import java.io.*; ?atHZLF
import java.net.*; z`2Ais@ao
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public class SiteFileFetch extends Thread { {D`_q|
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SiteInfoBean siteInfoBean = null; //文件信息Bean a?]~Sw"@
long[] nStartPos; //开始位置 W+'f|J=
long[] nEndPos; //结束位置 !vGJ7
FileSplitterFetch[] fileSplitterFetch; //子线程对象 v%4zP%4Ak[
long nFileLength; //文件长度 w1:%P36H
boolean bFirst = true; //是否第一次取文件 dCO7"/IHW
boolean bStop = false; //停止标志 Nf1&UgX
File tmpFile; //文件下载的临时信息 <uXQT$@?
DataOutputStream output; //输出到文件的输出流 3!Ca b/T
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//负责整个文件的抓取,控制内部线程(FileSplitterFetch类) -oB`v'
public SiteFileFetch(SiteInfoBean bean) throws IOException sL4+O P-
{
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siteInfoBean = bean; KF}_|~~T
//tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); ,nGZ(EBD
tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); '~n=<Y
if(tmpFile.exists ()) M|IgG:a;T
{ W&p f%?
bFirst = false; iL;{]A'0
read_nPos(); ?(E?oJ)(
} i/aj;t
else %R@&8
{ ^.u
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nStartPos = new long[bean.getNSplitter()]; K?gO]T{6
nEndPos = new long[bean.getNSplitter()]; ?a{>QyL
} l;vA"b=]
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} TQsTL2a
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public void run() =aCd,4B}
{ R~N'5#.*M
//获得文件长度 ~NBlJULS
//分割文件 !DZ4C.
//实例FileSplitterFetch 0*50uK=5
//启动FileSplitterFetch线程 mL3 Q
//等待子线程返回 *ez7Q
try{ Gn>~CoFN
if(bFirst) (tzfyZ M
{ {IT;g9x
nFileLength = getFileSize(); ;`rz ]7,*
if(nFileLength == -1) /9(8ML#E
{ *(j-jbA
System.err.println("File Length is not known!"); L,*#
} AN4(]_]
else if(nFileLength == -2) TM0DR'.
{ *@[N~:z/
System.err.println("File is not access!"); ?oulQR6:
} 0w ;#4X:m
else V<0J j
{ FXo{|z3
for(int i=0;i<nStartPos.length;i++) L;'C5#GN
{ }(v <f*7=n
nStartPos = (long)(i*(nFileLength/nStartPos.length)); R\:t
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} 02mu%|"
for(int i=0;i<nEndPos.length-1;i++) ;1L7+.A
{ (qg~l@rf
nEndPos = nStartPos[i+1]; f<l.%B
} g33Y]\
nEndPos[nEndPos.length-1] = nFileLength; @j+X>TD
} .R{+Pz D
} $Y<(~E$FX
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//启动子线程 O*-sSf
fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; vC _O!2E
for(int i=0;i<nStartPos.length;i++) "7_qB8\
{ 73tWeZ8rvx
fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), gfmaO]
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), Ps9YP B-
nStartPos,nEndPos,i); Cswa5l`af
Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); >TddKR@C
fileSplitterFetch.start(); ^9xsbv
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} (]*!`(_b
// fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), ~.f[K{h8
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); 77o&$l,A|
// Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", 6 jo+i[h
nEndPos = " + nFileLength); ~#V1Gunq
// fileSplitterFetch[nPos.length-1].start(); B)L;ja
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//等待子线程结束 AlQ
//int count = 0; E!v^j=h$u
//是否结束while循环 *r]Mn~3
boolean breakWhile = false; 7COJ.rA
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while(!bStop) >" z&KZKI
{ o= N_0.
write_nPos(); \~`qE<Q/
Utility.sleep(500); (VA:`pstP
breakWhile = true; UONW3}-
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for(int i=0;i<nStartPos.length;i++) Pw_[{ LL
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if(!fileSplitterFetch.bDownOver) Z,bv D'u
{ 8GD!]t#
breakWhile = false; hr] :bR
break; 0kB!EJ<OdG
} 8{Id+Q>Vo,
} ,0R2k `m!
if(breakWhile) ooPH [p
break; WxFrqUz
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//count++; ]Ak@!&hyak
//if(count>4) ^"d!(npw
// siteStop(); );.q:"
} %wp#vO-$
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System.err.println("文件下载结束!"); boR&'yX
} ,~_)Cf#CB
catch(Exception e){e.printStackTrace ();} "jUr[X2J
} S6sw)
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//获得文件长度 _~`\TS8
public long getFileSize() <E|K<}W#
{ .qioEqK8!y
int nFileLength = -1; i7[CqObzc
try{ EMe6Z!k
URL url = new URL(siteInfoBean.getSSiteURL()); X]Emz"
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); y/m^G=Q6g#
httpConnection.setRequestProperty("User-Agent","NetFox"); $e|G#mMd-
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int responseCode=httpConnection.getResponseCode(); Oifu ?f<r
if(responseCode>=400) L30x2\C
{ :ji_dQ8k
processErrorCode(responseCode); ~7!J/LHg
return -2; //-2 represent access is error b\%=mN
} KZL5>E
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String sHeader; QK\QvU2y
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for(int i=1;;i++) Lrz>0_Q
{ )Xa`LG=|
//DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); I~qS6#%r
//Utility.log(in.readLine()); Hi{c[;
sHeader=httpConnection.getHeaderFieldKey(i); yg "u^*r&
if(sHeader!=null) ]do0{I%\eq
{ ke~O+]
if(sHeader.equals("Content-Length")) 6:B[8otQ
{ {W}.z
nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); Um\Nd#=:
break; !>/U6h,_
} T IPb ]
} nD.4c-hd$q
else H!&]Di1Eh
break; KMznl=LF
}
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} @4h .?
catch(IOException e){e.printStackTrace ();} MyuFZ7Q4$
catch(Exception e){e.printStackTrace ();} $qy%Q]
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Utility.log(nFileLength); #:z.Br`
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return nFileLength; VbK| VON[
} g`gH]W
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//保存下载信息(文件指针位置) 6{}]QvR
private void write_nPos() Ve7[U_"
{ UBi0
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try{ M'HmVg4'
output = new DataOutputStream(new FileOutputStream(tmpFile)); <<v,9*h
output.writeInt(nStartPos.length); _7]* 5Pxo
for(int i=0;i<nStartPos.length;i++) lW?}jzuo
{ ar=uDb;
// output.writeLong(nPos); bKmR
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output.writeLong(fileSplitterFetch.nStartPos); c5<M=$
output.writeLong(fileSplitterFetch.nEndPos); (<(8(}x
} vz,l{0v
output.close(); Tw`^
} DK&J"0jz,
catch(IOException e){e.printStackTrace ();} Cz
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catch(Exception e){e.printStackTrace ();} =cM\o{ q
} Dx/?0F7V
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//读取保存的下载信息(文件指针位置) 7
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private void read_nPos() zm9>"(H
{ ^4O1:_|G
try{ }9aYU;9D
DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); l^%Ez?-:s
int nCount = input.readInt(); K]oFV
nStartPos = new long[nCount]; *rK}Ai
nEndPos = new long[nCount]; /^i7^
for(int i=0;i<nStartPos.length;i++) 7*M+bZ`x
{ 60*2k
nStartPos = input.readLong(); &o=
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nEndPos = input.readLong();
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} %/CCh;N#
input.close(); *ELbz}Q
} 0j7W\'!t
catch(IOException e){e.printStackTrace ();} \&`S~c V9
catch(Exception e){e.printStackTrace ();} -{>JF
} LS+ _y<v=
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private void processErrorCode(int nErrorCode) 4)!aYvaER
{ (2[tQ`~
System.err.println("Error Code : " + nErrorCode); d0"Hu^]
} ^J< I
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//停止文件下载 $5jQm,V$K
public void siteStop() ']WS@MbJ
{ 9i*t3W71]
bStop = true; WId"2W3M
for(int i=0;i<nStartPos.length;i++) L%}k.)yev
fileSplitterFetch.splitterStop(); aJ}y|+Cj
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} 7+0Kg'^+n
} 'X d_8.
//负责部分文件的抓取 !1$QNxgi
**FileSplitterFetch.java pwtB{6)VH{
*/ c
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package NetFox; RZ-=UIf
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import java.io.*; y3{'s>O6
import java.net.*; 18f!k
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public class FileSplitterFetch extends Thread {
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String sURL; //File URL e&sZ]{uD
long nStartPos; //File Snippet Start Position yB0xa%
long nEndPos; //File Snippet End Position }K':tX?
int nThreadID; //Thread's ID z*n
boolean bDownOver = false; //Downing is over .<7M4Z
boolean bStop = false; //Stop identical
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FileAccessI fileAccessI = null; //File Access interface kDbDG,O
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public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException eB%hP9=:x
{ $cjwY$6
this.sURL = sURL; W%&t[_21
this.nStartPos = nStart; t|-TG\Q X
this.nEndPos = nEnd; 7[z^0?Pygf
nThreadID = id; R9XISsM^
fileAccessI = new FileAccessI(sName,nStartPos);//定位 O&BNhuW2
} .)=T1^[hI
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public void run() "/H B#
{ "#}Uh
while(nStartPos < nEndPos && !bStop) ]JDKoA{S0
{ ~EIK
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try{ MpY/G%3
URL url = new URL(sURL); p+x}$&<|
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); ~dc
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httpConnection.setRequestProperty("User-Agent","NetFox"); xXb7/.*qE
String sProperty = "bytes="+nStartPos+"-"; ul(pp+%S
httpConnection.setRequestProperty("RANGE",sProperty); Q9T/@FX
Utility.log(sProperty); !s^[|2D_U
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InputStream input = httpConnection.getInputStream(); xWRkg$A
//logResponseHead(httpConnection); 7QSrC/e
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(1%O;D.*?{
byte[] b = new byte[1024]; !LI
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int nRead; B`<a~V
while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) o|7ztpr
{ 0*J},#ba$
nStartPos += fileAccessI.write(b,0,nRead); *ggai?
//if(nThreadID == 1) xg(*j[ff3
// Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); \u4`6EYF?
} pNFVa<D
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Utility.log("Thread " + nThreadID + " is over!"); c`Q#4e]%_
bDownOver = true; R6cd;| fan
//nPos = fileAccessI.write (b,0,nRead); x@*RF:\}
} F_I.=zQr
catch(Exception e){e.printStackTrace ();} YMG~k3Yb
} #i;y[dQ
} ~o8
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//打印回应的头信息 >,6%Y3
public void logResponseHead(HttpURLConnection con) $V870
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{ SX)o0v+
for(int i=1;;i++) vu@@!cT6e
{ <dWms`QcO
String header=con.getHeaderFieldKey(i); 4k_y;$4WN
if(header!=null) W0+m A
//responseHeaders.put(header,httpConnection.getHeaderField(header)); <SKzCp\
Utility.log(header+" : "+con.getHeaderField(header)); Oh=E!
else A.+Qa
break; 1v~1?+a\2
} 9,jFQb(),
} ~ugyUpY"
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public void splitterStop() ,p' ;Xg6ez
{ 4^GIQEjx
bStop = true; PfN[)s4F{R
} rM0Idc.$&&
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} rI#,FZ
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/* _ SJFuv/
**FileAccess.java ;;
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*//文件访问(定位,写) 7r{159&=
package NetFox; p~yGp]yJ9
import java.io.*; /_mU%fl
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public class FileAccessI implements Serializable{ 4 3G2{
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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 .#{m1mr
RandomAccessFile oSavedFile; b *Ca*!
long nPos; 534DAhpD=.
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public FileAccessI() throws IOException JIXZI\Fk
{ 85rjM#~
this("",0); G O[u
} *6wt+twH
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public FileAccessI(String sName,long nPos) throws IOException 7g.3)1
{ )sLXtV)nm6
oSavedFile = new RandomAccessFile(sName,"rw"); .zo>,*:t
this.nPos = nPos; S\0?~l"}
oSavedFile.seek(nPos); Rg7~?b-
} zt2#6v
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public synchronized int write(byte[] b,int nStart,int nLen) 1q/Q@O
{ AEo
int n = -1; I`q"
try{ M,g$
oSavedFile.write(b,nStart,nLen); @i(;}rx
n = nLen; ~y>N JM>1
} /{!?e<N>
catch(IOException e) w0,rFWS
{ eVRjU
e.printStackTrace (); ,IRy.
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} '7UIzk|
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return n; dCO)"]
} :\KJw
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} ,2]a<0m
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/* p_qJI@u8
**SiteInfoBean.java A;gU@8m
*/ E&>=
package NetFox; /XXy!=1J
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public class SiteInfoBean { %Mr^~7nN
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private String sSiteURL; //Site's URL x"{WLZ
private String sFilePath; //Saved File's Path 4(TR'_X(
private String sFileName; //Saved File's Name ':DLv{R
private int nSplitter; //Count of Splited Downloading File 2)(ynrCe
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public SiteInfoBean() $kd9^lj#[
{//nSplitter的缺省值为5 eY8rm
//default value of nSplitter is 5 ,g:\8*Y>'
this("","","",5); 4x2,X`pe3
} abkt&981K+
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public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) s> JWNP
{ 5?XIp6%x
sSiteURL= sURL; m.w.h^f$&
sFilePath = sPath; ?V' zG&n@
sFileName = sName; `
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this.nSplitter = nSpiltter; }N0v_Nas;v
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} .A
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public String getSSiteURL() mY&(&'2T"
{ fzjAP7 y
return sSiteURL; B3'-:
} m#`1.5%
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public void setSSiteURL(String value) DE!c+s_g4
{ dzs(sM=
sSiteURL = value; THY=8&x)
} xP-\)d-.aN
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public String getSFilePath() >b2wFo/em
{ P@FE3g
return sFilePath; #D-Ttla
} <g1=jG:7k
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public void setSFilePath(String value) Jsf"h-)P
{ r mJ`^6V
sFilePath = value; 8:fq!m
} 3gs!ojG
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public String getSFileName() `rb}"V+
{ <