/* n>U5R_T
**SiteFileFetch.java z,%$+)K
*/ 2SR: FUV/
package NetFox; d4z/5Oa
import java.io.*; X+]G-
import java.net.*; 3%=~)7cF
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public class SiteFileFetch extends Thread { y Fq&8 x<X
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SiteInfoBean siteInfoBean = null; //文件信息Bean _``=cc
long[] nStartPos; //开始位置 >t_6B~x9
long[] nEndPos; //结束位置 ?=fyc1
FileSplitterFetch[] fileSplitterFetch; //子线程对象 F`]2O:[
long nFileLength; //文件长度 WQO) =n
boolean bFirst = true; //是否第一次取文件 G9<X_
boolean bStop = false; //停止标志 4)o
File tmpFile; //文件下载的临时信息 h;NYdX5
DataOutputStream output; //输出到文件的输出流 @bP)406p
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//负责整个文件的抓取,控制内部线程(FileSplitterFetch类) vd4ytC
public SiteFileFetch(SiteInfoBean bean) throws IOException PXNh&N
{ WVvvI9
siteInfoBean = bean; (7=9++uU
//tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); %vi<Aseg
tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); As<bL:>dE
if(tmpFile.exists ()) Jo23P.#<
{ 1|-Dj|
bFirst = false; \=0Vi6!Mc
read_nPos(); x{WD;$J
} "wh ,Ue
else fPW@{~t
{ "OnGE$
nStartPos = new long[bean.getNSplitter()]; -_eLf#3
nEndPos = new long[bean.getNSplitter()]; $5Ff1{
} ))'<_nD
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} N_[*H
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public void run() O/(xj2~$J
{ vTw>JNVI
//获得文件长度 GYUn6P
//分割文件 yd`mG{Z
//实例FileSplitterFetch 'u<juFr
//启动FileSplitterFetch线程 y;@:ulv[
//等待子线程返回 [RTs[3E^
try{ =P
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if(bFirst) Aj+F
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{ 1Nd2{(
nFileLength = getFileSize(); 7g}w+p>
if(nFileLength == -1) gQ1;],_
{ t" Z6[XG
System.err.println("File Length is not known!"); :${HQd+
} .];=Pu^
else if(nFileLength == -2) (n9gkO&8"
{
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System.err.println("File is not access!"); HJYScwjQ;`
} ]1pIj
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else 3fQuoQuD"}
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for(int i=0;i<nStartPos.length;i++) 6MdiY1Lr!K
{ agW@{c
nStartPos = (long)(i*(nFileLength/nStartPos.length)); ysf~|r4s
} W'+:'_{ j:
for(int i=0;i<nEndPos.length-1;i++) n3
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nEndPos = nStartPos[i+1]; G?/DrnK:
} u.Tcg^ v
nEndPos[nEndPos.length-1] = nFileLength; v^iL5y!
} yFlm[K5YD
} 9.B
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//启动子线程 PGV/ h
fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; qE3UO<FA
for(int i=0;i<nStartPos.length;i++) %m$Sp47
{ ?|B&M\}g
fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), P:]^rke~&
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), _?0}<kQ&
nStartPos,nEndPos,i); Ob&<]
Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); h6`6tk
fileSplitterFetch.start(); UVIKQpA]A
} uT7B#b7
// fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), 1 \6D '/G
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); KE3;V2Ym f
// Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", eHNyNVz
nEndPos = " + nFileLength); r/6o \-
// fileSplitterFetch[nPos.length-1].start(); _#8RSr8'y
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//等待子线程结束 6wECo
//int count = 0; !.(P~j][
//是否结束while循环 I(7NQ8Hx
boolean breakWhile = false; VYImI>.t{
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while(!bStop) :; fHDU|
{ 1rF]yi:X
write_nPos(); mahJSz(3
Utility.sleep(500); c?&X?<
breakWhile = true; s6.M \^
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for(int i=0;i<nStartPos.length;i++) ^mO~W!"
{ V"G*N<q
if(!fileSplitterFetch.bDownOver) WQL\y3f5
{ !SdSE^lz`
breakWhile = false; E+g@M8D
break; n!xt5=xP{
} /Uy"M:|V1
} 9}F*P669f
if(breakWhile) Vi]W |bP
break; kbMWGB%;
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//count++; k=JrLfD4
//if(count>4) T1Z;r*}
// siteStop(); ={d>iB yq
} [)zP6\I
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System.err.println("文件下载结束!"); ,-d0b0
} /-+xQn]
catch(Exception e){e.printStackTrace ();} MUREiL9L|
} 4UvZ)^r
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//获得文件长度 pRIhFf
public long getFileSize() {NFr]LGOp
{ @l jA
int nFileLength = -1; "wnzo,
try{ h"_;IUZ!
URL url = new URL(siteInfoBean.getSSiteURL()); {rH@gz|@i
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); :L RYYw
httpConnection.setRequestProperty("User-Agent","NetFox"); LzXmb 7A
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int responseCode=httpConnection.getResponseCode(); p#?7w
if(responseCode>=400) ?Unb?
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{ GyIT{M}KV
processErrorCode(responseCode); *|C^=*j9
return -2; //-2 represent access is error xLWwYK
} $oU*9}}Rn
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String sHeader; s!c`=
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for(int i=1;;i++) p~^D\jR.
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//DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); ]#l/2V1
//Utility.log(in.readLine()); o(LFh[
sHeader=httpConnection.getHeaderFieldKey(i); PHXZ=A+
if(sHeader!=null) &cHV7
{ `c5"d
if(sHeader.equals("Content-Length")) Q$1bWUS&
{ X=!^] 3zH
nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); G{ sOR
break; vss(twg
} : $Y9jR
} m)v"3ib
else Nj
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break; bE#,=OI$
} zHL@i0>^
} ICs\
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catch(IOException e){e.printStackTrace ();} PQnF
catch(Exception e){e.printStackTrace ();} !^=*Jq>
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Utility.log(nFileLength); 1[qLA!+
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return nFileLength; O[s{ Gk'>
} s'a/j)^
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//保存下载信息(文件指针位置) 9XyYHi
private void write_nPos() P'*)\faw
{ V=qwwYz~
try{ pP?MWe
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output = new DataOutputStream(new FileOutputStream(tmpFile)); cc&axc7I
output.writeInt(nStartPos.length); ^xHTW g%9
for(int i=0;i<nStartPos.length;i++) v'qG26
{ jR22t`4
// output.writeLong(nPos); ^ZhG>L*
output.writeLong(fileSplitterFetch.nStartPos); V |/NB
output.writeLong(fileSplitterFetch.nEndPos); ') gi%
} :xD=`ib
output.close(); v!P b`LCqK
} u7[ykyV
catch(IOException e){e.printStackTrace ();} %Nhx;{
catch(Exception e){e.printStackTrace ();} ,TPISs
} SAK!z!t
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//读取保存的下载信息(文件指针位置) ,M6Sy]Aj
private void read_nPos() #qI= Z0Y
{ (TwnkXrR,
try{ "@d[h ,TM
DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); wsN?[=l{s
int nCount = input.readInt(); }YMy6eW4
nStartPos = new long[nCount]; t!x5 fNo)
nEndPos = new long[nCount]; C\nhqkn
for(int i=0;i<nStartPos.length;i++) 6morum
{ 4%}*&nsI-Z
nStartPos = input.readLong();
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nEndPos = input.readLong(); `V"sOTb
} [}8|R0KF
input.close(); 2?,EzBeal
} Y"Ql!5=
catch(IOException e){e.printStackTrace ();} ,(?po(']
catch(Exception e){e.printStackTrace ();} W#BM(I
} x~{;TZa[I
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private void processErrorCode(int nErrorCode) H nUYqhZS
{ Eu-RNrYh#
System.err.println("Error Code : " + nErrorCode); Xn,v]$M!
} \X&H;xnC5
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//停止文件下载 gO,25::")
public void siteStop() .I'o
{ c`WHNky%j
bStop = true; (v|}\?L
for(int i=0;i<nStartPos.length;i++) WxJf{=-
fileSplitterFetch.splitterStop(); DrBUe'RH:M
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} ]Xf% ,iu
} @`Eg(
//负责部分文件的抓取 x-<)\L&
**FileSplitterFetch.java .YnFH$;$
*/ [],1lRYI9_
package NetFox; 13%t"-@bh
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import java.io.*; t|!j2<e
import java.net.*; E)7F\ w
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public class FileSplitterFetch extends Thread { $w0lrh[+
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String sURL; //File URL f7~9|w&
long nStartPos; //File Snippet Start Position I,VH=Yn5,
long nEndPos; //File Snippet End Position 3a 1 u
int nThreadID; //Thread's ID Cc<,z*T
boolean bDownOver = false; //Downing is over d,tU#N{Q6
boolean bStop = false; //Stop identical ]f: v,a
FileAccessI fileAccessI = null; //File Access interface TsUOpEuX
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public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException k`9)=&zX+
{ g'u?Rn7*J
this.sURL = sURL; <[J[idY1he
this.nStartPos = nStart; pM&YXb?
this.nEndPos = nEnd; V8wKAj
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nThreadID = id; B Ma)O
fileAccessI = new FileAccessI(sName,nStartPos);//定位 @81Vc<dJ
} >'xGp7}y
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public void run() ,i6RE
{ V&|Ed
while(nStartPos < nEndPos && !bStop) ?EpSC&S\
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try{ ,7)C"
URL url = new URL(sURL); RQB]/D\BO
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); Gqcz<=/
httpConnection.setRequestProperty("User-Agent","NetFox"); j.ldaLdG
String sProperty = "bytes="+nStartPos+"-"; kR@Yl Yo
httpConnection.setRequestProperty("RANGE",sProperty); 7Irau_
Utility.log(sProperty); B_l{<
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InputStream input = httpConnection.getInputStream(); p,<&zHb>K
//logResponseHead(httpConnection); `)h6j)xiQ
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byte[] b = new byte[1024]; Hiv!BV|
int nRead; w pt='(
while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) %?hsoj&k
{ m8JR@!t7
nStartPos += fileAccessI.write(b,0,nRead); Ty@=yA17
//if(nThreadID == 1) ,j ',x\
// Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); ).HDru-2
} \[>9UC%
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Utility.log("Thread " + nThreadID + " is over!"); hv$m4,0WB
bDownOver = true; H,<7G;FPT
//nPos = fileAccessI.write (b,0,nRead); g3sUl&K
} %F9{EXJy
catch(Exception e){e.printStackTrace ();} o}'bv
} )|<_cwz
} 4YMX|1wd)
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//打印回应的头信息 #W2[
public void logResponseHead(HttpURLConnection con) |nk3^;Yf
{ l\!-2 T6Y
for(int i=1;;i++) ]G}B 0u3
{ Q2%QLM:.,
String header=con.getHeaderFieldKey(i); O:/yAc`
if(header!=null) 0l#)fJo
//responseHeaders.put(header,httpConnection.getHeaderField(header)); RF!1oZ
Utility.log(header+" : "+con.getHeaderField(header)); :9Y$'+ <&H
else =}fd6ea(o
break; @C-dG7U.P
} R,!Q
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} Ld,5iBiO:
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public void splitterStop() x2#qg>`l
{ s&{Qdf
bStop = true; Lj%{y.Rj
} q 'a
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} F{\gc|!i
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/* oXt,e
**FileAccess.java >Dg#9
*//文件访问(定位,写) =`C4qC_
package NetFox; DV]7.Bm
import java.io.*; l??;3kh1
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public class FileAccessI implements Serializable{ 8Chu"PM%-J
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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 I5);jgb
RandomAccessFile oSavedFile; m>e3vu
long nPos; dYojm1MQ
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public FileAccessI() throws IOException l t]B#, '
{ F X1ZG!
this("",0); f|a DTWF
} Y"eEkT\
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public FileAccessI(String sName,long nPos) throws IOException fd8#Ng"1
{ %xyX8c{sP
oSavedFile = new RandomAccessFile(sName,"rw"); -#A:`/22
this.nPos = nPos; c;I, O
oSavedFile.seek(nPos); x@cN3O
} 88a<{5
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public synchronized int write(byte[] b,int nStart,int nLen) s3lwu :4f
{ @#b0T:+v'
int n = -1; mg+k'Myo+
try{ ~HUZ#rUHm>
oSavedFile.write(b,nStart,nLen); 9 K
n = nLen; P-JfV 7(O8
} +ydm,aKk
catch(IOException e) WA.\*Nqz e
{ kJ: 2;t=
e.printStackTrace (); ZAg;q#z j
} 3On
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return n; dNVv4{S
} dTD5(}+J
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} CYB=Uq,
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/* ~' =lou
**SiteInfoBean.java voRfjsS~
*/ <qiICb)~
package NetFox; DB&SOe
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public class SiteInfoBean { g^o_\hp
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private String sSiteURL; //Site's URL 5&4F,v[zp
private String sFilePath; //Saved File's Path yCM{M
private String sFileName; //Saved File's Name <~%t$:
private int nSplitter; //Count of Splited Downloading File zw:/!MS
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public SiteInfoBean() gB CC
{//nSplitter的缺省值为5 {>.>7{7
//default value of nSplitter is 5 S+*cbA{J|
this("","","",5); 4IGxI7~27#
} T=?
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