/* o
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**SiteFileFetch.java [hf#$Dl|
*/ Jmln*,Ol7
package NetFox; T[iwP~l
import java.io.*; \h%/Cp+p
import java.net.*; x)hp3&L
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public class SiteFileFetch extends Thread { :VPZGzK4
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SiteInfoBean siteInfoBean = null; //文件信息Bean -Kj^ l3w
long[] nStartPos; //开始位置 0ih=<@1 K
long[] nEndPos; //结束位置 o)P'H"Ki
FileSplitterFetch[] fileSplitterFetch; //子线程对象 #^- U|~,
long nFileLength; //文件长度 gE/O29Y
boolean bFirst = true; //是否第一次取文件 zkdyfl5
boolean bStop = false; //停止标志 iBy:HH
File tmpFile; //文件下载的临时信息 ]-$0?/`p8
DataOutputStream output; //输出到文件的输出流
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//负责整个文件的抓取,控制内部线程(FileSplitterFetch类) Xi'y-cV
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public SiteFileFetch(SiteInfoBean bean) throws IOException +h6cAqm]
{ "28b&pm
siteInfoBean = bean; d#N<t`
//tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); F z_SID
tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); fPs'A
if(tmpFile.exists ()) "lo:"y(u
{ ]@W.5!5H
bFirst = false; Uk u~"OGC
read_nPos(); ?qviJDD|f
} pJ6Z/3]
else a;Q6S
{ t)n!];
nStartPos = new long[bean.getNSplitter()]; eI@LVi6<b
nEndPos = new long[bean.getNSplitter()]; R=IZFwr
} M@rknq@
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} n>tYeN)F<
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public void run() igp[cFN
{ 'aQ"&GX@
//获得文件长度 -X ~VXeg
//分割文件 I3QK~ V*j)
//实例FileSplitterFetch e9;<9uX
//启动FileSplitterFetch线程 :,$:@
//等待子线程返回 y K~;LV
try{ a %"My;8
if(bFirst) dnVl;L8L3
{ )+c4n]
nFileLength = getFileSize(); K@P5]}'#
if(nFileLength == -1) )8ejT6r
{ )miY>7K
System.err.println("File Length is not known!"); 9 veq
} H/>86GG
else if(nFileLength == -2) ;E/:_DWPD
{ q/Dc*Qn
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System.err.println("File is not access!"); <@9p|[!
} +(iM]L$Fw%
else 12*'rU;*
{ cB
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for(int i=0;i<nStartPos.length;i++) iN0gvjZ
{ @Iz vObK
nStartPos = (long)(i*(nFileLength/nStartPos.length)); R9o3T)9V
} #EiOC.A=
for(int i=0;i<nEndPos.length-1;i++) [Y_6PR
{ A.<HOx
nEndPos = nStartPos[i+1]; 4oT1<n`r+
} Yxye?R-:
nEndPos[nEndPos.length-1] = nFileLength; <o^_il$W
} C`c;I7
} r>1M&Y=<
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//启动子线程 -o<L%Y<n2
fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; 9^Q:l0|
for(int i=0;i<nStartPos.length;i++) >s}bq#x
{ a;J{'PHu
fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), F gM<2$h
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), _D:#M
nStartPos,nEndPos,i); Z-`j)3Y
Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); JnCp'`
fileSplitterFetch.start(); 0[@9f1Nk4
} c#M'Mye
// fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), $:kG>R@\t
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); \TSt
// Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", eOa:%{Kj
nEndPos = " + nFileLength); :B?XNo
// fileSplitterFetch[nPos.length-1].start(); U`_(Lq%5W
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//等待子线程结束 ooY2"\o
//int count = 0; TQDb\d8,f
//是否结束while循环 %-!ruc"}
boolean breakWhile = false; 2mAXBqdm
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while(!bStop) jZu">Eh,
{ |><hdBQXX<
write_nPos(); = R|?LOEK+
Utility.sleep(500); )=TD}Xb
breakWhile = true; (.a:jL$
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for(int i=0;i<nStartPos.length;i++) Z,/BPK<e
{ u1a5Vtel
if(!fileSplitterFetch.bDownOver) rMIr&T
{ n.]K"$230
breakWhile = false; 2'_xg~
break; 5 7e'a&}e
} uj|{TV>v9
}
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if(breakWhile) WJBi#(SY
break; .a\b_[+W
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//count++; 8MgoAX,p
//if(count>4) )tGeQXVhbJ
// siteStop(); U2z1HIs
} !0:uM)_k
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System.err.println("文件下载结束!"); vwDnz/-
} ?1JVzZ4H
catch(Exception e){e.printStackTrace ();} =vLeOX
} \tTZN
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//获得文件长度 /gh=+;{
public long getFileSize() &gxRw l
{ `9rwu:3i
int nFileLength = -1; @Ong+^m|PC
try{ 5qtZ`1Hq
URL url = new URL(siteInfoBean.getSSiteURL()); Q{6Bhx *>
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); ss'#sPX
httpConnection.setRequestProperty("User-Agent","NetFox"); :U!kn b"/>
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int responseCode=httpConnection.getResponseCode(); ,<n >g;
if(responseCode>=400) xlG/$`Ab
{ YIo$
processErrorCode(responseCode); z/u;afB9q
return -2; //-2 represent access is error {Y-<#U~iH
} "1>I/CM
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String sHeader; &1Dq3%$c
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for(int i=1;;i++) T X.YTU
{ [YG\a5QK
//DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); @ SaU2
//Utility.log(in.readLine()); ]2\|<.
sHeader=httpConnection.getHeaderFieldKey(i); L
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if(sHeader!=null) j#d=V@=a
{ {_QXx
if(sHeader.equals("Content-Length")) tZmo= 3+:
{ <a7y]Py
nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); \xG>>A%
break; 8 hx4N
} @Z> {/
} ]TQ2PVN2
else R=P=?U.
break; Y`jvza%
} : xI SS
} (#GOXz
catch(IOException e){e.printStackTrace ();} 7K3S\oPej
catch(Exception e){e.printStackTrace ();} -b+VzVJZ
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Utility.log(nFileLength); X@KF}x's
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return nFileLength; x`K<z
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} ?t++IEoP
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//保存下载信息(文件指针位置) h^R EBPe
private void write_nPos() JVbR5"+.
{ I$!rNfrs
try{ zhtNL_
output = new DataOutputStream(new FileOutputStream(tmpFile)); a;JB8
output.writeInt(nStartPos.length); cM%I5F+n
for(int i=0;i<nStartPos.length;i++) }&A!h
{ :N$^x /{
// output.writeLong(nPos); DXu915
output.writeLong(fileSplitterFetch.nStartPos); FrBoE#
output.writeLong(fileSplitterFetch.nEndPos); |PR8P!'
} l"^'uGB'
output.close(); GlkTpX^b
} NrH2U Jm
catch(IOException e){e.printStackTrace ();} ^=:e9i3u
catch(Exception e){e.printStackTrace ();} _u TaN
} -t~l!!N(
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//读取保存的下载信息(文件指针位置)
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private void read_nPos() c,nE@~ul2
{ I3`WY-uv
try{ 5%,5Xe4p
DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); Hhx"47:
int nCount = input.readInt(); 3V~871:-~
nStartPos = new long[nCount]; dbM~41C6
nEndPos = new long[nCount]; ssaEAm:
for(int i=0;i<nStartPos.length;i++) \6o%gpUkD
{ pw|f4c7AH
nStartPos = input.readLong(); =@(&xfTC
nEndPos = input.readLong(); J%ng8v5ex
} kt?G\H!}
input.close(); y%%D="
} aphfzo
catch(IOException e){e.printStackTrace ();} )D'SfNx#{
catch(Exception e){e.printStackTrace ();} eV:I :::
} MH@=Qqx#=t
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private void processErrorCode(int nErrorCode) GaV6h|6_
{ iAD'MB
System.err.println("Error Code : " + nErrorCode); 6.%M:j00E
}
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//停止文件下载 iUDN m|e
public void siteStop() U-~cVk+LI
{ 52Sq;X
bStop = true; N$>.V7H&
for(int i=0;i<nStartPos.length;i++) $yxwB/ O(
fileSplitterFetch.splitterStop(); 3
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} ipzv]c&
} 8~*<s5H
//负责部分文件的抓取 x!5b"
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**FileSplitterFetch.java ;
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*/ 8@;|x2=y
package NetFox; k1Z"Qmz
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import java.io.*; eS(hLXE!7
import java.net.*; <12 ia"}
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public class FileSplitterFetch extends Thread { g7\MFertR^
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String sURL; //File URL matW>D;J
long nStartPos; //File Snippet Start Position t&scvXh
long nEndPos; //File Snippet End Position Fg` P@hC
int nThreadID; //Thread's ID [+,%T;d;
boolean bDownOver = false; //Downing is over :
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boolean bStop = false; //Stop identical aumWU{j=
FileAccessI fileAccessI = null; //File Access interface ~N
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public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException !O|d,)$q
{ bloe|o!
this.sURL = sURL; 2gP^+.
this.nStartPos = nStart; Dp1FX"a)
this.nEndPos = nEnd; VpmwN`
nThreadID = id; ivTx6-]
fileAccessI = new FileAccessI(sName,nStartPos);//定位 wJ.?u]f@
} 6.#5Ra
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public void run() : jgvg$fd
{ n^}M*#
while(nStartPos < nEndPos && !bStop) a'zXLlXgGd
{ 2rxZN\gyL
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try{ ng,64(wOY
URL url = new URL(sURL); =Sjr*)<@j
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); 87&BF)]
httpConnection.setRequestProperty("User-Agent","NetFox"); +
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String sProperty = "bytes="+nStartPos+"-"; @34Z/%A
httpConnection.setRequestProperty("RANGE",sProperty); !+bLhW`
Utility.log(sProperty); m.:2G
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InputStream input = httpConnection.getInputStream(); Y9}5&#
//logResponseHead(httpConnection); ~vL7$-:
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byte[] b = new byte[1024]; IZ9L
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int nRead; Cd Bsd
while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) s,z$Vt"h*K
{ ^)i5.o\
nStartPos += fileAccessI.write(b,0,nRead); :eHD{=
//if(nThreadID == 1) A(Tqf.,G
// Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); 4c})LAwd&
} *:r6E
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Utility.log("Thread " + nThreadID + " is over!");
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bDownOver = true; QmHj=s:x\
//nPos = fileAccessI.write (b,0,nRead); vw.rkAGY
} yM_ta '^$
catch(Exception e){e.printStackTrace ();} F+!w[}0
} U3UKu/Z
} K[,d9j`^
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//打印回应的头信息 "c+j2f'f
public void logResponseHead(HttpURLConnection con) jRn5)u
{ ~ShoU
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for(int i=1;;i++) N*^iOm]Y
{ ?$chO|QY
String header=con.getHeaderFieldKey(i); MC'2;,
if(header!=null) ejFGeR
//responseHeaders.put(header,httpConnection.getHeaderField(header)); {pWb*~!k
Utility.log(header+" : "+con.getHeaderField(header)); E \p Qh
else Xl/SDm_p
break; rofGD9f
} ~8oti4
} 8D
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public void splitterStop() 6np
{ rT#2'-f
bStop = true; L- '{
} k vuSE
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} ce&Q}_
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/* YK{E=<:
**FileAccess.java l-v(~u7
*//文件访问(定位,写) (GCe D-
package NetFox; e>zv+9'Q
import java.io.*; eb` !
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public class FileAccessI implements Serializable{ $~;h}I
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//RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 RV=Z$
RandomAccessFile oSavedFile; uY_vX\;67z
long nPos; V7gv@<1<y
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public FileAccessI() throws IOException yIq.
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{ %"jp':
this("",0); [X&VxTxr
} I$y6N"|
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public FileAccessI(String sName,long nPos) throws IOException !
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{ id?B<OM
oSavedFile = new RandomAccessFile(sName,"rw"); h>a/3a$g
this.nPos = nPos; W'xJh0o
oSavedFile.seek(nPos); #Fwf]{J
} *.,G;EC^
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public synchronized int write(byte[] b,int nStart,int nLen) llE_-M2gH
{ P}re"<MD
int n = -1; L|`(u
try{ E9bc pup
oSavedFile.write(b,nStart,nLen); v<AFcY
n = nLen; AE@N:a
} `zP{E T_Y
catch(IOException e) }\?]uNH
{ ?= RC?K
e.printStackTrace (); 2mt
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} {/2
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return n; *dpKo&y
} xm*6I
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} 1
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/* &_o.:SL|
**SiteInfoBean.java tj1M1s|a
*/ Nu[0X
package NetFox; &a9Y4~e::
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public class SiteInfoBean { v*lj>)L
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private String sSiteURL; //Site's URL JW2~
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private String sFilePath; //Saved File's Path ]w5j?h"b
private String sFileName; //Saved File's Name 17ol %3 M
private int nSplitter; //Count of Splited Downloading File HxnWM\ p
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public SiteInfoBean() -VafN
{//nSplitter的缺省值为5 \(4kEB2s$
//default value of nSplitter is 5 ;56mkP
this("","","",5); "~,3gNTzV
} %SC%#_7
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public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) GS qt:<Qs
{ V+>.Gf
sSiteURL= sURL; B4RP~^
sFilePath = sPath; /DxeG'O
sFileName = sName; ;a9`z+ K
this.nSplitter = nSpiltter; ;NPbEPL[5
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} =2&