/* oChf&W 8u
**SiteFileFetch.java q #8z%/~k
*/ !:_krLB<
package NetFox; !l9#a{#6l
import java.io.*; 6Tq2WZ}<'
import java.net.*; Pi%-bD/w
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public class SiteFileFetch extends Thread { l`:-B'WM
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SiteInfoBean siteInfoBean = null; //文件信息Bean COH.`Tv{*
long[] nStartPos; //开始位置 #S|On[Q!
long[] nEndPos; //结束位置 [eDRghK
FileSplitterFetch[] fileSplitterFetch; //子线程对象 g)<[-Q1
long nFileLength; //文件长度 / pGx!
boolean bFirst = true; //是否第一次取文件 i-sm 9K'ns
boolean bStop = false; //停止标志 TP`"x}ACa?
File tmpFile; //文件下载的临时信息 K$$%j "s
DataOutputStream output; //输出到文件的输出流 j{m{hVa
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//负责整个文件的抓取,控制内部线程(FileSplitterFetch类) /sSif0I24
public SiteFileFetch(SiteInfoBean bean) throws IOException tU8aPiUl
{ e.|t12)L "
siteInfoBean = bean; :yOJL [x
//tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); Hjy4tA7,l
tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); xfqu=z8X
if(tmpFile.exists ()) ,` $2
{ 2\Yv;J+;
bFirst = false; | fn%!d`2
read_nPos(); U71A#OD^U
} RS7J~Q
else Vl:M6d1
{ A<[w'"
nStartPos = new long[bean.getNSplitter()]; <.@w%rvG
nEndPos = new long[bean.getNSplitter()]; Sh<A936/E
} (B].ppBii
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} ;|CG9|p
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public void run() oIKuo~
{ kChCo0Q>1
//获得文件长度 uD`Z\@Z
//分割文件 =?hbi]
//实例FileSplitterFetch .R@euIva
//启动FileSplitterFetch线程 3TKl
//等待子线程返回 EmV ZqW
try{ 9lX+?m~ ~
if(bFirst) >>>MTV f
{ ,0n=*o@W
nFileLength = getFileSize(); sDy~<$l?
if(nFileLength == -1) cdfnM% `>\
{ SsIN@
System.err.println("File Length is not known!"); zOL*XZ0c
} 8w3Wy<}y
else if(nFileLength == -2) T(*A0
{ uq]E^#^
System.err.println("File is not access!"); 5=.mg6:
} @N\
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else H4e2#]*i7
{ 42
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for(int i=0;i<nStartPos.length;i++) uU8L 93
{ l{3ZN"`I
nStartPos = (long)(i*(nFileLength/nStartPos.length)); jTok1k
} l @r`NFWD@
for(int i=0;i<nEndPos.length-1;i++) N*Xl0m(Q
{ A)f/ww)Q
nEndPos = nStartPos[i+1]; 1h?:gOig
} tkhEjTZ
nEndPos[nEndPos.length-1] = nFileLength; -k3WY&9,
} &_Gu'A({J
} #U/L8
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//启动子线程 |Fzt|
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fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; &. "ltB
for(int i=0;i<nStartPos.length;i++) $K!6T
{ rK
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fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), zm^5WH
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), z%/<|`
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nStartPos,nEndPos,i); Dl=vv9
Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos);
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fileSplitterFetch.start(); bKPjxN?!9
} #r80FVwiD
// fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), rj;~SC{
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1);
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// Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", ?Q}3X-xy
nEndPos = " + nFileLength); M_F4I$V4
// fileSplitterFetch[nPos.length-1].start(); DOWZhD
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//等待子线程结束
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//int count = 0; t?_{
//是否结束while循环 `qr.@0whP
boolean breakWhile = false; lJBZ0
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while(!bStop) yI$MqR
{ unkA%x{W;
write_nPos(); X0%BE!
Utility.sleep(500); qnU$Pd
breakWhile = true; vXcgl
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for(int i=0;i<nStartPos.length;i++) qk\LfRbj
{ Z+! 96LR
if(!fileSplitterFetch.bDownOver) -<gQ>`(0
{ _1HEGX\
breakWhile = false; !o/;"'&E
break; Yk#$-"c/a
} ' ui`EL %
} &ETPYf%#
if(breakWhile) v1Jg8L=
break; SCD;(I~4
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//count++; 5lakP?
//if(count>4) ;F>I+l_X
// siteStop(); Y]HtO^T2
} )N]%cO(^
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System.err.println("文件下载结束!"); *uZ'MS
} lyrwm{&
catch(Exception e){e.printStackTrace ();} M%FKg/
} m}fY5r<<;/
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//获得文件长度 0'tm.,
public long getFileSize() Dlu]4n[LB
{ /pnQKy.
int nFileLength = -1; C)qP9uW
try{ ,DWC=:@X
URL url = new URL(siteInfoBean.getSSiteURL()); |:d:uj/
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); mi{ r7.e5I
httpConnection.setRequestProperty("User-Agent","NetFox"); jh.e&6
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int responseCode=httpConnection.getResponseCode(); 7)v`l1
if(responseCode>=400) q
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{ N`i`[ f
processErrorCode(responseCode); %c,CfhEV%&
return -2; //-2 represent access is error STQ~mFs"
} {_*$X
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String sHeader; =)y=39&;/
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for(int i=1;;i++) Kkz2N
{ AZjj71UE
//DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); I~I$/j]e`
//Utility.log(in.readLine()); &T/}|3S
sHeader=httpConnection.getHeaderFieldKey(i); vH9Gf
if(sHeader!=null) 'l3K*lck
{ {V9}W<
if(sHeader.equals("Content-Length")) (Qys`D
{ }X*.Vv A
nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); ) "Toh=x]
break; /2PsC*y
} k34!*(`q
} qfzT8-Y
else ;Cqjg.wkB
break; N?;5%pG
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} B[Fuy y?
} rSfvHO:R
catch(IOException e){e.printStackTrace ();} O1K~]Nt
catch(Exception e){e.printStackTrace ();} )Y+?)=~
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Utility.log(nFileLength); E8.xmTq
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return nFileLength; M.R]hI
} VpMPTEZ*L
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//保存下载信息(文件指针位置) ?*8HZ1m#
private void write_nPos() 5Pl~du
{ ,0Y5O?pu\
try{ 4?^t=7N
output = new DataOutputStream(new FileOutputStream(tmpFile)); F
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output.writeInt(nStartPos.length); B>&eciY
for(int i=0;i<nStartPos.length;i++) .8%mi'0ud
{ )vFZl]
// output.writeLong(nPos); (e;9,~u)
output.writeLong(fileSplitterFetch.nStartPos); P>t[35/1
output.writeLong(fileSplitterFetch.nEndPos); ZXj;ymC'
} Tse
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output.close(); X K5qE"
} =
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catch(IOException e){e.printStackTrace ();} t7p`A8&
catch(Exception e){e.printStackTrace ();} _}B:SM
} R?Or=W)i
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//读取保存的下载信息(文件指针位置) -f-2!1&<3h
private void read_nPos() :J}@*>c
{ qm)KO 4
try{ 5CsJghTw
DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); J12ZdC'O
int nCount = input.readInt(); #}A
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nStartPos = new long[nCount]; =Gq
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nEndPos = new long[nCount]; k(;c<Z{?1
for(int i=0;i<nStartPos.length;i++) ^f,('0p->
{ XHlx89v7
nStartPos = input.readLong(); vK\;CSk
nEndPos = input.readLong(); oGLSk(T&I
} K>`7f]?H*e
input.close(); )ccdfSe
} 4%I(Z'*Cx
catch(IOException e){e.printStackTrace ();} FT*
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catch(Exception e){e.printStackTrace ();} jbqhNsTNK
} :oH"
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private void processErrorCode(int nErrorCode) $bU|'}QR
{ x6ig,N~AO
System.err.println("Error Code : " + nErrorCode); \8!&XcA
} .#;;pu7W
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//停止文件下载 M9@#W"
public void siteStop() @:. 6'ji,`
{ o"x&F
bStop = true;
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for(int i=0;i<nStartPos.length;i++) j]"Yzt~u
fileSplitterFetch.splitterStop(); URW'*\Xjb
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} K`@GNT&
} i%W,Y8\uf*
//负责部分文件的抓取 `C`_2y8
**FileSplitterFetch.java OwQ 9y<v
*/ :!1B6Mc
package NetFox; qb
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import java.io.*; $2^V#GWo
import java.net.*; 'Z7oPq6
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public class FileSplitterFetch extends Thread { '7W?VipU
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String sURL; //File URL +MQf2|--
long nStartPos; //File Snippet Start Position A;h0BQm/j
long nEndPos; //File Snippet End Position I ,AI$A
int nThreadID; //Thread's ID UJ)\E
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boolean bDownOver = false; //Downing is over t9PS5O ;
boolean bStop = false; //Stop identical ?#\?&uFJ}
FileAccessI fileAccessI = null; //File Access interface hSD)|
{
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public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException r&\}E+
{ +gOCl*L
this.sURL = sURL; KTk%Np
this.nStartPos = nStart; =? x A*_^
this.nEndPos = nEnd; B{|P}fN5}
nThreadID = id;
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fileAccessI = new FileAccessI(sName,nStartPos);//定位 _-Aw`<_*-
} fZXJPy;n
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public void run() a'Qy]P}'Ug
{ LIVVb"V|,
while(nStartPos < nEndPos && !bStop) /PIU@$DV
{ A"C%.InZ
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try{ \nx^=4*yk
URL url = new URL(sURL); Xt8;Pl
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); 1(!!EcU_
httpConnection.setRequestProperty("User-Agent","NetFox"); o)?"P;UhJX
String sProperty = "bytes="+nStartPos+"-"; q[q#cY:0
httpConnection.setRequestProperty("RANGE",sProperty); KI$?0O
Utility.log(sProperty); |zvxKIW;wd
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InputStream input = httpConnection.getInputStream(); N:clwmo
//logResponseHead(httpConnection); [ WZ<d^L
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byte[] b = new byte[1024]; $Kb-mFR
int nRead; FWdSpaas Q
while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) >9=Y(`
{ TRAs5I%
nStartPos += fileAccessI.write(b,0,nRead); q?Q"Ab
//if(nThreadID == 1) n\*>mp)
// Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); ` /]8C&u
} =X>3C"]
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Utility.log("Thread " + nThreadID + " is over!"); 8{JTR|yB
bDownOver = true; :
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//nPos = fileAccessI.write (b,0,nRead); _:M6~XHo
} pLBp[GQ
catch(Exception e){e.printStackTrace ();} J*,Ed51&7
} c1CP12
} Z5-"a?{Y
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//打印回应的头信息 f;pR8
public void logResponseHead(HttpURLConnection con) ~?-U
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{ {*t'h?b
for(int i=1;;i++) \p@,+ -gX
{ ahS*YeS7
String header=con.getHeaderFieldKey(i); }PyAmh$@
if(header!=null) >}O1lsjW:z
//responseHeaders.put(header,httpConnection.getHeaderField(header)); X'jEI{1w
Utility.log(header+" : "+con.getHeaderField(header)); nf/iZ &
else [CRy>hfV
break; cGsxfwD
} 6l [TQ
} lbT<HWzNH
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public void splitterStop() xJ>hN@5}i
{ c2?(.UV
bStop = true; 52l|
} MY9?957F
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} z=>]E1'RL
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/* #B`"B
**FileAccess.java ?*,N
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*//文件访问(定位,写) %~^R Iwm
package NetFox; wxo(
import java.io.*; w:'$Uf8]
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public class FileAccessI implements Serializable{ 5[X^1
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//RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 ]ueq&|
RandomAccessFile oSavedFile; [:g6gAuh,
long nPos; Sqc*u&W
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public FileAccessI() throws IOException :;{U2q+
{ qdZn9i
this("",0); Iy|]U&`
} .yi.GRk
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public FileAccessI(String sName,long nPos) throws IOException X_Y$-I$qd
{ i0p"q p
oSavedFile = new RandomAccessFile(sName,"rw"); MV9{>xX
this.nPos = nPos; .__X[Mzth3
oSavedFile.seek(nPos); b*dRNu
} c0!bn b
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public synchronized int write(byte[] b,int nStart,int nLen) 0~Yg={IKhK
{ |`qur5h`
int n = -1; ?PyI#G
try{ /o8`I
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oSavedFile.write(b,nStart,nLen); [^ 7^&/0
n = nLen; <&l3bL
} A8c'CMEm
catch(IOException e) D9#e2ex]
{ <po(7XB
e.printStackTrace (); )]>=Uo
} ]Z<{
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return n; Om>6<3n
} JWMIZ{/M
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} T{sw{E*
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/* &z1r$X.AW
**SiteInfoBean.java !c(B^E
*/ 7:M%w'oR
package NetFox; qx0J}6+NlU
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public class SiteInfoBean { Ms^Y:,;Hi
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private String sSiteURL; //Site's URL |P5?0{
private String sFilePath; //Saved File's Path 86IAAO`#
private String sFileName; //Saved File's Name eSa ]6
private int nSplitter; //Count of Splited Downloading File xiA9X]FB
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public SiteInfoBean() ^Y #?@
{//nSplitter的缺省值为5 0qJ(3N
//default value of nSplitter is 5 bG.aV#$FIg
this("","","",5); N1#*~/sXh
} $D9JsUij
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public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) YroKC+4"i
{ zUwz[^d<C
sSiteURL= sURL; %I6iXq#
sFilePath = sPath; )vuxy
sFileName = sName; fKrOz!b
this.nSplitter = nSpiltter; jew?cnRmd
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} iCl,7$[*
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public String getSSiteURL() 1!vR
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{ (O&