/* -02cI}e
**SiteFileFetch.java }la\?I
*/ m`CcU`s
package NetFox; 4UD<g+|
import java.io.*; :#W40rUb
import java.net.*; }z:g}".4
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public class SiteFileFetch extends Thread { Sn=|Q4ZN
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SiteInfoBean siteInfoBean = null; //文件信息Bean _ #]uk&5a
long[] nStartPos; //开始位置 ^*(*tS|M
long[] nEndPos; //结束位置 V)#se"GV
FileSplitterFetch[] fileSplitterFetch; //子线程对象 lj0"2@z3"E
long nFileLength; //文件长度 6p`AdDV
boolean bFirst = true; //是否第一次取文件 [mX/]31
boolean bStop = false; //停止标志 2>BWu
File tmpFile; //文件下载的临时信息 )7@f{E#w
DataOutputStream output; //输出到文件的输出流 1sx@Nvlb
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//负责整个文件的抓取,控制内部线程(FileSplitterFetch类) epM;u
public SiteFileFetch(SiteInfoBean bean) throws IOException /.{4
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{ .U|irDO
siteInfoBean = bean; N"Y)
//tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); =>nrU8x
tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); jf25Ky~
if(tmpFile.exists ()) ]G.ttfC
{ :ad
bFirst = false; 1vKc>+9
read_nPos(); (n:d
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} 0gdFXh$!e
else (XW\4msB)I
{ 6d/;GyG
nStartPos = new long[bean.getNSplitter()]; G q%q x4
nEndPos = new long[bean.getNSplitter()]; P__JN\{9
} iq'hel
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} *ue-
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public void run() g-`HKoKe
{ C
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//获得文件长度 G|eY$5!i
//分割文件 rMRM*`Q2
//实例FileSplitterFetch ^<X+t&!z
//启动FileSplitterFetch线程 N~7xj?
//等待子线程返回 !$&k@#v:
try{ jo 0
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if(bFirst) 'z$ BgXh\
{ u[nx?!
nFileLength = getFileSize(); xCU^4DO3p
if(nFileLength == -1) q =sEtH=
{ Qvc "?yx8}
System.err.println("File Length is not known!"); K;,zE6WD$$
} lbM)U
else if(nFileLength == -2) A[lbBR
{ d%1Tv1={
System.err.println("File is not access!"); ~uy{6U{&I
} Ip#BR!$n
else xs+pCK |
{ 0/{$5gy&
for(int i=0;i<nStartPos.length;i++) .B2?%2S
{ Q72}V9I9
nStartPos = (long)(i*(nFileLength/nStartPos.length)); HKu? J
} fZ8%Z
for(int i=0;i<nEndPos.length-1;i++) '
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{ {
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nEndPos = nStartPos[i+1]; }diB
} n0|oV(0FE
nEndPos[nEndPos.length-1] = nFileLength; \Tf[% Kt x
} _dOR-<
} fik*-$V`
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//启动子线程 VB
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fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; <T] BSQk
for(int i=0;i<nStartPos.length;i++) ZlaU+Y(_[
{ 7ux0|l
fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), {OFbU
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), cp D=9k!*K
nStartPos,nEndPos,i); 0($@9k4!/
Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); \@G
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fileSplitterFetch.start(); X!=E1TL
} )P&>Tc?;z
// fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), @J J,$?
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); hcWYz
// Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", #4hxbRN
nEndPos = " + nFileLength); tA#7Xr+
// fileSplitterFetch[nPos.length-1].start(); :cDhqBMNr`
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//等待子线程结束 ^{z@=o<o
//int count = 0; ]O%wZIp\P
//是否结束while循环 E=N44[`.G
boolean breakWhile = false; $P<T`3Jg
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while(!bStop) K@uUe3
{ {+D
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write_nPos(); E?$|`<o{|`
Utility.sleep(500); %:61@<
breakWhile = true; tE&@U$0>o
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for(int i=0;i<nStartPos.length;i++) w[`2t{^j
{ Po+I!TL'
if(!fileSplitterFetch.bDownOver) #<_gY
{ sK1YmB :~a
breakWhile = false; 5Q_T=TL
break; QGv$ ~A[h
}
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} Kob i!
if(breakWhile) Af*e:}}
break; rByC6HV"
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//count++; w5j6RQml
//if(count>4) *g0} pD;r
// siteStop(); %V40I{1
} a4'KiA2r
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System.err.println("文件下载结束!"); $bf&ct*$h
} )C?bb$
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catch(Exception e){e.printStackTrace ();} $e(]L(o;
} jg2UX
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//获得文件长度 px|y_.DB2x
public long getFileSize() 6??o(ziK$
{ d4y?2p ?3
int nFileLength = -1; 5U%J,W
try{ b=V"$(Q
URL url = new URL(siteInfoBean.getSSiteURL()); , 7` /D
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); !Q-h#']~L
httpConnection.setRequestProperty("User-Agent","NetFox"); &ZkY9XO
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int responseCode=httpConnection.getResponseCode(); /(/Z~J[
if(responseCode>=400) d!BQ%a
{ C!]R0L*
processErrorCode(responseCode); .Vohd@s9l
return -2; //-2 represent access is error "nkj_pC
} 0D x,)C
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String sHeader; j41)X'MgJ
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for(int i=1;;i++) bfjC: "!H
{ s& INcjC
//DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); X#625h
//Utility.log(in.readLine()); 7(ni_|$|
sHeader=httpConnection.getHeaderFieldKey(i); [w0@7p"7
if(sHeader!=null) ,r=9$i_
{ Iq76JJuCb
if(sHeader.equals("Content-Length")) hW^*b:v{
{ YY!Lv:.7>
nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); [r[IWy(}
break; .f1
} }OQaQf9V{
} sj;n1t}$S
else Qs38VlR_m
break; tl:V8sYTP
} d|P,e;m-
} _*tU.x|DP
catch(IOException e){e.printStackTrace ();} K-_XdJ\
catch(Exception e){e.printStackTrace ();} 74[wZDW|(
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Utility.log(nFileLength); x.5!F2$
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return nFileLength; 4tQ~Z6Jn;
} J$aE:g6'
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//保存下载信息(文件指针位置) 4AIo,{(
private void write_nPos() 5%qq#;[n
{ X.q,
try{ TFfV?rBI
output = new DataOutputStream(new FileOutputStream(tmpFile)); cO8':P5Q
output.writeInt(nStartPos.length); :.k1="H~@
for(int i=0;i<nStartPos.length;i++) {V8yJ{.G
{ 3"*tP+H
// output.writeLong(nPos); fbTq?4&Q
output.writeLong(fileSplitterFetch.nStartPos); )S:,q3gxJ
output.writeLong(fileSplitterFetch.nEndPos); eD(;Wn
} bvay7
output.close(); O/(QLgUr
} :V9%R~h/
catch(IOException e){e.printStackTrace ();} D(E3{\*R
catch(Exception e){e.printStackTrace ();} ~pZ<VH;h
} _/Sqw
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//读取保存的下载信息(文件指针位置) 0[# zn
private void read_nPos() _#dBcEH[
{ s%&/Zt
try{ VW$a(G_h
DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); Gu#Vc.e
int nCount = input.readInt(); O(R1D/A[
nStartPos = new long[nCount]; TR<M3,RG#%
nEndPos = new long[nCount]; G!u+~{g
for(int i=0;i<nStartPos.length;i++) {Vw\#/,
{
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nStartPos = input.readLong(); >U~{WM$"Y
nEndPos = input.readLong(); `{Jo>L.
} a-cLy*W,~
input.close(); Lhts4D/V7
} rIh"MQvi[
catch(IOException e){e.printStackTrace ();} g3Xa b
catch(Exception e){e.printStackTrace ();} PeX^aEc
} H|.cD)&eYy
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private void processErrorCode(int nErrorCode) F3?PlH:Y
{ kS7`g A
System.err.println("Error Code : " + nErrorCode); QX`T-)T e
} nxjP4d>
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//停止文件下载 ^t$xR_
public void siteStop() @^2?97i
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{ O x),jc[/
bStop = true; =d*5TyAcu
for(int i=0;i<nStartPos.length;i++) t=;P1d?E;
fileSplitterFetch.splitterStop(); 8ofKj:W]
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} hr/H vB
} 0|}]=XN^
//负责部分文件的抓取 W"v"mjYud
**FileSplitterFetch.java z@8W
*/ +_T`tmQ
package NetFox; lz [s
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import java.io.*; 8Y,imj\(v
import java.net.*; xU!eT'Y
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public class FileSplitterFetch extends Thread { ;ztt*py
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String sURL; //File URL 3F gTM(
long nStartPos; //File Snippet Start Position CX}==0od
long nEndPos; //File Snippet End Position fP KFU
int nThreadID; //Thread's ID bzWWW^kNL
boolean bDownOver = false; //Downing is over aGml!N5'
boolean bStop = false; //Stop identical Pm/Rc
FileAccessI fileAccessI = null; //File Access interface u85dG7
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public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException b6?&h:{k
{ K(3_1*e
this.sURL = sURL; )j+G4
this.nStartPos = nStart; | zyO;
this.nEndPos = nEnd; JC.nfxG@:
nThreadID = id; f.G"[p
fileAccessI = new FileAccessI(sName,nStartPos);//定位 Js'j}w
} tJvs
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public void run() KK';ho,W
{ O63:t$Yx#
while(nStartPos < nEndPos && !bStop) m>9j dsqB
{ 9SQcChG~j
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try{ ' 4.T1i,
URL url = new URL(sURL); tyU'[LF?
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); ?p'DgL{
httpConnection.setRequestProperty("User-Agent","NetFox"); w(oi6kg
String sProperty = "bytes="+nStartPos+"-"; mXOY,g2w
httpConnection.setRequestProperty("RANGE",sProperty); U}R(
Utility.log(sProperty); K"/3/`T
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InputStream input = httpConnection.getInputStream(); XI\P#"
//logResponseHead(httpConnection); >e^^YR^
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byte[] b = new byte[1024]; Y[rRz6.*(
int nRead; FaLc*CU
while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) s4[PwD
{ <lgX=wx L
nStartPos += fileAccessI.write(b,0,nRead);
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//if(nThreadID == 1) n09P!],Xa
// Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); [ 0z-X7=e
} )?;+<,
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Utility.log("Thread " + nThreadID + " is over!"); 2C AR2V|
bDownOver = true; .$ X|96~$
//nPos = fileAccessI.write (b,0,nRead); FEA t6
} }u]7 x:lh
catch(Exception e){e.printStackTrace ();} KP&$Sl
} a];1)zVA6
} %W^Zob
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//打印回应的头信息 -sxu7I
public void logResponseHead(HttpURLConnection con) ^Rb*mI
{ >0JCu^9
for(int i=1;;i++) ;R]~9Aan
{ k`BS{,=
String header=con.getHeaderFieldKey(i); q.bxnta"
if(header!=null) $kBcnk
//responseHeaders.put(header,httpConnection.getHeaderField(header)); <~zPt&C]V
Utility.log(header+" : "+con.getHeaderField(header)); :n,x?bM
else ?|Ey WAL
break; UaB2vuL*=
} j@R"AP}
} DN;|?oNZ
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public void splitterStop() gu"@*,hL
{ yRR[M@Y
bStop = true; Z~]G+(
} 'fYF1gR4
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} ~? :>=x
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/* "?^#+@LV
**FileAccess.java M<r]a{Yv
*//文件访问(定位,写) Gkm{b[
package NetFox; W~FU!C?]
import java.io.*; +~"(Wooi
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public class FileAccessI implements Serializable{ _UV_n!R
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//RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 mD%IHzbn
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RandomAccessFile oSavedFile; [Z^26/5a
long nPos; sB5@6[VDI
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public FileAccessI() throws IOException &crR nv?
{ K >Q6
this("",0); OAaLCpRp
} Dq-[b+bm
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public FileAccessI(String sName,long nPos) throws IOException WmkCV+thA
{ J:@yG1VIp
oSavedFile = new RandomAccessFile(sName,"rw"); %2\6.c=c
this.nPos = nPos; b94+GLU8b
oSavedFile.seek(nPos); c-"vQ>ux+
} 4K
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public synchronized int write(byte[] b,int nStart,int nLen) BIEq(/-
{ 5,+fM6^V
int n = -1; `FwE^_9d
try{ AH?[K,3
oSavedFile.write(b,nStart,nLen); KquuM ]5S
n = nLen; .Rt~d^D@
} 5uV_Pkb?8
catch(IOException e) w'9!%mr
{ 7\N }QP0"u
e.printStackTrace (); Y`3\Z6KlV
} >7r%k,`
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return n; egAYJK-,!
} S f6%A
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} 3
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/* _5S||TuNS
**SiteInfoBean.java G7i0P j
*/ N) PkE>%X
package NetFox; 9z`72(
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public class SiteInfoBean { !MVf(y$
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private String sSiteURL; //Site's URL @urZ
private String sFilePath; //Saved File's Path N 'n0I^Y1A
private String sFileName; //Saved File's Name ^j2ve's:
private int nSplitter; //Count of Splited Downloading File 4 Dy1M}7
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public SiteInfoBean() ~dzD7lG6
{//nSplitter的缺省值为5 &3J^z7kU
//default value of nSplitter is 5 )!U@:x\K
this("","","",5); B`||4*
} ex^9 l b
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public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) =k,?+h~
{ X,Rl&K\b"
sSiteURL= sURL; #;5Qd'
sFilePath = sPath; hk$I-
sFileName = sName; O hRf&5u$
this.nSplitter = nSpiltter; g7^|(!Y%
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} ]')y(_{
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public String getSSiteURL() 3t9CN
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{ cucmn*o?
return sSiteURL; V7`vLs-
} sAPQbTSM
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public void setSSiteURL(String value) \B:k|Pw6~
{ We\i0zUU
sSiteURL = value; s: iBl/N}
} c`&g.s@N\
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public String getSFilePath() P{BW^kAdH
{ D?UURUR f
return sFilePath; J"@X>n
} ';!-a]N
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public void setSFilePath(String value) bBV03_*
{ q#I'@Jbj
sFilePath = value; iBtG@M
} TvS<;0~K
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public String getSFileName() }_F:]lI*R
{ G Y.iCub
return sFileName; &