/* Fo86WP}
**SiteFileFetch.java `PVr;&
*/ {u4=*>?G
package NetFox; yQ{xRtNO
import java.io.*; V( A p|I:G
import java.net.*; IS9}@5`'
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public class SiteFileFetch extends Thread { *6b$l.Vs
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SiteInfoBean siteInfoBean = null; //文件信息Bean Jfs$VGZP;
long[] nStartPos; //开始位置 Pm*N!:u
long[] nEndPos; //结束位置 q;{# ~<"+
FileSplitterFetch[] fileSplitterFetch; //子线程对象 Kf!8PR$
long nFileLength; //文件长度 ~=xS\@UY =
boolean bFirst = true; //是否第一次取文件 ?!$uMKyt
boolean bStop = false; //停止标志 >lg-j-pV
File tmpFile; //文件下载的临时信息 ,&X7D]
DataOutputStream output; //输出到文件的输出流 }&I^1BHZs
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//负责整个文件的抓取,控制内部线程(FileSplitterFetch类) ~ d!F|BH4
public SiteFileFetch(SiteInfoBean bean) throws IOException (&y~\t]H
{ )n&@`>vm
siteInfoBean = bean; Spt]<~
//tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); =5QP'Qt{O
tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); 6JYVC>i
if(tmpFile.exists ()) w?LDaSz\t
{ Np?%pB!Q
bFirst = false; 6)B6c. 5o
read_nPos(); [LHx9(,NM
} A^9RGz4=
else %1Pn;bUU!
{ !L)~*!+Gf
nStartPos = new long[bean.getNSplitter()]; as%ab[ fX
nEndPos = new long[bean.getNSplitter()]; E"|LA[o
} k Up[b~
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} ~VqDh*0
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public void run() t|ih{0
{ _ 3l ci
//获得文件长度 ,%zU5 hh
//分割文件 `?H yDny
//实例FileSplitterFetch :"pA0oB
//启动FileSplitterFetch线程 ,iQRf@#W_b
//等待子线程返回 ?C[W~m P
try{ )Uk!;b
if(bFirst) `=zlS"dQ
{ qkEre
nFileLength = getFileSize(); M!9gOAQP
if(nFileLength == -1) \.`;p
{ XmK2Xi;=b
System.err.println("File Length is not known!"); :&{:$-h!
} 4zRz U
else if(nFileLength == -2) i`Tp +e@a>
{ VJeoO)<j
System.err.println("File is not access!"); _shoh
} BXCB/:0
else r ^m8kYezQ
{ `k 5'nnyP
for(int i=0;i<nStartPos.length;i++) zree}VqD;5
{ fnwhkL#8
nStartPos = (long)(i*(nFileLength/nStartPos.length)); ~q.a<B`,t
} 9uNkd2#
for(int i=0;i<nEndPos.length-1;i++) kma)DW
{ /5l"rni
nEndPos = nStartPos[i+1]; GbLuXU
} ?OYK'p.
nEndPos[nEndPos.length-1] = nFileLength; <:,m
} ^{IF2_h"
} )H'SU_YU
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//启动子线程 907N;r
fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; VDyQv^=#
for(int i=0;i<nStartPos.length;i++) k`5jy~;
{ "x+o(jOy
fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), 1^x"P #u
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), #s\HiO$BT
nStartPos,nEndPos,i); C3XB'CL6
Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); [%);N\o2Y
fileSplitterFetch.start(); P0B`H7D
} v/fo`]zP
// fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), TQ{rg2_T
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); Vw^2TRU
// Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", Tke3X\|
nEndPos = " + nFileLength); CWTPf1?eB
// fileSplitterFetch[nPos.length-1].start(); x'4q`xDa
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//等待子线程结束 -|"[S"e
//int count = 0; y.O%
//是否结束while循环 m>H+noc^
boolean breakWhile = false;
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while(!bStop) &!xePKvO6k
{ ko2T9NI:S
write_nPos(); YKUb'D:t]
Utility.sleep(500); $j+RUelFY
breakWhile = true; 9?jD90@
}
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for(int i=0;i<nStartPos.length;i++) ?F^$4:
{ }f~:>N#
if(!fileSplitterFetch.bDownOver) + Z7 L&BI
{ ,[}
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breakWhile = false; ,R-T( <r
break; 9_h
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}
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} (mNNTMe
if(breakWhile) 0:CIM
break; a7]wPXKq
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//count++; Yq$KYB j
//if(count>4) <r@w`G
// siteStop(); xF#'+Y
} H n^)Xw
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System.err.println("文件下载结束!"); v_ U$jjO1
} >-%}'iz+
catch(Exception e){e.printStackTrace ();} @L 9C_a
} pL&
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//获得文件长度 JNJ96wnX1
public long getFileSize() N<$dbqoT|
{ V,*<E &+
int nFileLength = -1; RZ6[+Ygn
try{ (uxe<'Co|
URL url = new URL(siteInfoBean.getSSiteURL()); $ouw*|<
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); |=o)|z2
httpConnection.setRequestProperty("User-Agent","NetFox"); L&I8lG
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int responseCode=httpConnection.getResponseCode(); $ #*";b)QY
if(responseCode>=400) C8xx R~mq
{ j&
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processErrorCode(responseCode); v!>(1ROQ.=
return -2; //-2 represent access is error e}PJN6"5
} SqF `xw
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String sHeader; F=B[%4q`%
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for(int i=1;;i++) *K57($F
{ zAZ+'9LB
//DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); ' 1 }ybSG
//Utility.log(in.readLine()); S.I3m-
sHeader=httpConnection.getHeaderFieldKey(i); n&n WY+GEo
if(sHeader!=null) j6JK4{
{ .:b&$~<
if(sHeader.equals("Content-Length")) Fhk 8
{ >iKbn
nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); jO5,PTV
break; Nuebxd
} UG!528;7
} zUIh^hbFf
else [Zpx
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break; ~0 PR>QJ
} l!d |luqbA
} &>xd6-
catch(IOException e){e.printStackTrace ();} S#:yl>2
catch(Exception e){e.printStackTrace ();} TpSv7k T]
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Utility.log(nFileLength); 'bb*$T0=
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return nFileLength; +NT8dd
} 4%GwCEnS
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//保存下载信息(文件指针位置) YaT6vSz
private void write_nPos() %*A|hK+G:W
{ =-m"y~{>3
try{ &*JU
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output = new DataOutputStream(new FileOutputStream(tmpFile)); &Rp/y%9
output.writeInt(nStartPos.length); )ZQ>h{}D
for(int i=0;i<nStartPos.length;i++) gic!yhsS_
{ ]_EJ "'x
// output.writeLong(nPos); \,ko'48@
output.writeLong(fileSplitterFetch.nStartPos); JS^QfT,zE
output.writeLong(fileSplitterFetch.nEndPos); ceUhCb
} v\3
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output.close(); ,8`CsY^1
} ;S5J"1)O~
catch(IOException e){e.printStackTrace ();} +@"Ls P
catch(Exception e){e.printStackTrace ();} e*!0|#-
} g.wDg
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//读取保存的下载信息(文件指针位置) 0zHMtC1,
private void read_nPos() |lG7/\A
{ G &QG Q
try{ /7CV7=^d,
DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); EW~M,+?
int nCount = input.readInt(); b3M`vJ+{
nStartPos = new long[nCount]; ?nCo?A
nEndPos = new long[nCount]; w2(pgWed
for(int i=0;i<nStartPos.length;i++) ^Mm sja5K
{ unB`n'L
nStartPos = input.readLong(); 579<[[6~d2
nEndPos = input.readLong(); '~\\:37+
} iRIO~XVo
input.close(); )7jJ3G*
} !SPu9:
catch(IOException e){e.printStackTrace ();} =A]*r9
catch(Exception e){e.printStackTrace ();} sd,KB+)
} ;xQNa}"V
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private void processErrorCode(int nErrorCode) Py~1xf/
{ h0oe'Xov
System.err.println("Error Code : " + nErrorCode); b9Mp@I7Q-
} r^v1_u,1I
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//停止文件下载 '5xvR G
public void siteStop() 3Ow bU
{ Kk\TW1w3
bStop = true; n|N?[)^k
for(int i=0;i<nStartPos.length;i++) 8svN*`[
fileSplitterFetch.splitterStop(); oB$c-!&
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} Z'!i"Jzq|{
} ?_t_rF(?6
//负责部分文件的抓取 :lBw0{fP
**FileSplitterFetch.java Ju@8_ ?8=
*/ A:4?Jd>
package NetFox; [aF"5G
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import java.io.*; + usB$=kJ
import java.net.*; )&s9QBo{b
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public class FileSplitterFetch extends Thread { TFG0~"4Cz
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String sURL; //File URL v83@J~
long nStartPos; //File Snippet Start Position ' +f(9/
long nEndPos; //File Snippet End Position X6Q\NJ"B
int nThreadID; //Thread's ID H{4_,2h=m
boolean bDownOver = false; //Downing is over QJF_ "
boolean bStop = false; //Stop identical "DC L
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FileAccessI fileAccessI = null; //File Access interface g-4j1yJV<
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public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException @gnLY
{ Vj[hT~{f
this.sURL = sURL; W+I""I*mV
this.nStartPos = nStart; bk|?>yd
this.nEndPos = nEnd; !<vy!pXg
nThreadID = id; 0WSOA[R%[b
fileAccessI = new FileAccessI(sName,nStartPos);//定位 L _Xbca=
} nIWY<Z"
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public void run() D!V~g72j
{ `4-N@h
while(nStartPos < nEndPos && !bStop) RpwDOG
{ U'LPaf$O
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try{ fb[? sc
URL url = new URL(sURL); b#(X+I
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); tTbfyI
httpConnection.setRequestProperty("User-Agent","NetFox"); UCo`l~K)qg
String sProperty = "bytes="+nStartPos+"-"; rV
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httpConnection.setRequestProperty("RANGE",sProperty); {8"Uxj_6V
Utility.log(sProperty); 8[H bg
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InputStream input = httpConnection.getInputStream(); jbe_r<{
//logResponseHead(httpConnection); TDX~?>P
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byte[] b = new byte[1024]; ^fj30gw7\5
int nRead; A_Y5{6@
while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) XzBlT( `w
{ #sE:xIR
nStartPos += fileAccessI.write(b,0,nRead); #y
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//if(nThreadID == 1) &ZL4/e
// Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); aA]wFZ
} :W#?U yo
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Utility.log("Thread " + nThreadID + " is over!"); a1shP};pK
bDownOver = true; OkMAqS
//nPos = fileAccessI.write (b,0,nRead); Gi\Z"MiBZ
} SB`xr!~A]
catch(Exception e){e.printStackTrace ();} P2F8[o!<
} d~q7!
} X!6$<8+1OV
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//打印回应的头信息 _BoA&Ism
public void logResponseHead(HttpURLConnection con) ]:}7-;$V
{ p]qz+Z/
for(int i=1;;i++) !ScEA=
{ p}e| E!
String header=con.getHeaderFieldKey(i); 1'H!S%fS
if(header!=null) QT=i>X
//responseHeaders.put(header,httpConnection.getHeaderField(header)); qIxe)+.
Utility.log(header+" : "+con.getHeaderField(header)); .O SQ8W}
else o$ #q/L
break; t$b5,"G1
} b3ys"Vyn
} Z>~7|vl
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public void splitterStop() d4) 0G-|
{ MkWbPm)
bStop = true; p^w_-(p
} H`,t "I
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} K1w:JA6(
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/* hW` o-'
**FileAccess.java j
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*//文件访问(定位,写) 89{`GKWX
package NetFox; zYM0?O8pJ~
import java.io.*; -XnOj2
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public class FileAccessI implements Serializable{ gX|\O']6
>vXS6`;
//RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 [
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RandomAccessFile oSavedFile; 6Ilj7m*
long nPos; 4wWfaL5"
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public FileAccessI() throws IOException xZ(d*/6E
{ 53?Ati\Y)
this("",0); iba8G]2
} z/nW;ow
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public FileAccessI(String sName,long nPos) throws IOException h
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{ wYDdy gS
oSavedFile = new RandomAccessFile(sName,"rw"); Lt
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this.nPos = nPos; |{RCvm
oSavedFile.seek(nPos); 9v1 Snr
} {;Oj
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public synchronized int write(byte[] b,int nStart,int nLen) WXG0Z
{ s#(7D3Pr#
int n = -1; L* ScSxw
try{ p.H`lbVY
oSavedFile.write(b,nStart,nLen); IJC]Al,df
n = nLen; ]=59_bkD:s
} 5H, (\Xd
catch(IOException e) i^8w0H<-@v
{ /B|"<`-H
e.printStackTrace (); CAmIwAx6;
} ff=RKKnN
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return n; 7%G&=8tq
} _#uRKy<`N
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} q29d=
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/* 1~j,A[&|<
**SiteInfoBean.java U ,!S1EiBs
*/ 1bHQB$%z
package NetFox; {:KPEN
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public class SiteInfoBean { 0_,un^
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private String sSiteURL; //Site's URL qQ1D }c@
private String sFilePath; //Saved File's Path _ q
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private String sFileName; //Saved File's Name ~f( #S*Ic
private int nSplitter; //Count of Splited Downloading File s>[Oe|`
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public SiteInfoBean() ~#)9Kl7<X
{//nSplitter的缺省值为5 bJkFCI/
//default value of nSplitter is 5 1lJ^$U
this("","","",5); k(v &+v
} Do5{t'm3
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