/* A+@&"
**SiteFileFetch.java UR:aD_h
*/ 4|A>b})H
package NetFox; v}WR+)uFQ
import java.io.*; }68i[v9Njk
import java.net.*; Nn>'^KZNG
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public class SiteFileFetch extends Thread { 0"~i^
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SiteInfoBean siteInfoBean = null; //文件信息Bean O25lLNmO
long[] nStartPos; //开始位置 R^{)D3
long[] nEndPos; //结束位置 =4d (b ;
FileSplitterFetch[] fileSplitterFetch; //子线程对象 HF|oBX$_
long nFileLength; //文件长度 w+1Gs
;
boolean bFirst = true; //是否第一次取文件 Y8flrM2CwG
boolean bStop = false; //停止标志 J>d.dq>r
File tmpFile; //文件下载的临时信息 5zON}"EC
DataOutputStream output; //输出到文件的输出流 8p[)MiC5W^
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//负责整个文件的抓取,控制内部线程(FileSplitterFetch类) 1CLL%\V
public SiteFileFetch(SiteInfoBean bean) throws IOException 5nbEf9&
{ )O:0]=#))
siteInfoBean = bean; 26CS6(sn
//tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); 6(PM'@i
tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); @{Gncy|
if(tmpFile.exists ()) E7-@&=]v
{
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bFirst = false; A!^q
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read_nPos(); &^4++
} z3?o|A }/W
else w3jO6*_ M
{ vq34/c^
nStartPos = new long[bean.getNSplitter()]; r(gXoq_w
nEndPos = new long[bean.getNSplitter()]; !?Wp+e6
} }@.|?2b +
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} 7gRgOzWfV
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public void run() YuB+k^
{ Ar~"R4!
//获得文件长度 HaIM#R32T
//分割文件 qWw\_S
//实例FileSplitterFetch $AHQmyg<
//启动FileSplitterFetch线程 EqI(|bFwy
//等待子线程返回 k{t`|BnPKB
try{ I}R0q
if(bFirst) P;4w*((} ~
{ 37}D9:#5C
nFileLength = getFileSize(); w3$
if(nFileLength == -1) #c2ymQm
{ utr:J
System.err.println("File Length is not known!"); Y))NK'B5
} J=/5}u_gw
else if(nFileLength == -2) *2jK#9"MP
{ r&FDEBh
System.err.println("File is not access!"); 6-O_\Cq8
} bJs9X/E
else @B}aN@!/
{ _YRE (YZ/
for(int i=0;i<nStartPos.length;i++) 43=,yz2Ef
{ ,a#EW+" Z
nStartPos = (long)(i*(nFileLength/nStartPos.length)); 5atYOep
} 8_N]e'WUh
for(int i=0;i<nEndPos.length-1;i++) ;| 1$Q!4
{ $8BPlqBIZ
nEndPos = nStartPos[i+1]; i~r l o^
} z;y:9l
nEndPos[nEndPos.length-1] = nFileLength; 3do)Vg4
} |fo0
} 5eWwgA
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//启动子线程 p)+k=b
fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; n0is\ZK 0
for(int i=0;i<nStartPos.length;i++) m)oJFF
{ ^Ox3XC
fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), zl`h~}I
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), Wl}&?v&@
nStartPos,nEndPos,i); 7F'`CleU
Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); j)q\9#sI/(
fileSplitterFetch.start(); &4_qF^9J
} i&n'N8D@
// fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), CD8}I85K
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); mx=BD'
// Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", vhhC>
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nEndPos = " + nFileLength); U,LTVYrO
// fileSplitterFetch[nPos.length-1].start(); !kC*g
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//等待子线程结束 Fgh]KQ/5
//int count = 0; QPq7R
//是否结束while循环 b6*!ACY
boolean breakWhile = false; ]~Z6;
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while(!bStop) %'T #pz
{ =)7s $
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write_nPos(); 2@
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Utility.sleep(500); "]G\9b)
breakWhile = true; AQ='|%
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for(int i=0;i<nStartPos.length;i++) >+[&3u
{ 2;?I>~
if(!fileSplitterFetch.bDownOver) L{c q, jk
{ FLY
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breakWhile = false; ,`aq+K
break; FKmFo^^0
} Sr?#S
} LlSZr)X
if(breakWhile) `[n("7,
break; %$DI^yS
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//count++; &@3H%DP}Ql
//if(count>4) 5+wAzVA
// siteStop(); |ely|U. Tf
} vEn4L0D
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System.err.println("文件下载结束!"); jkvgoxY
} tzh1s
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catch(Exception e){e.printStackTrace ();} 2r ZxSg
} ,tg0L$qC
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//获得文件长度 L/z),#
public long getFileSize() o-Ga3i 8
{ ZR'H\Z
int nFileLength = -1; i _%Q`i
try{ h3;bxq!q
URL url = new URL(siteInfoBean.getSSiteURL()); RG4 sQ0
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); O
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httpConnection.setRequestProperty("User-Agent","NetFox"); ]H1I,`=@
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int responseCode=httpConnection.getResponseCode(); %?Ev|:i`@
if(responseCode>=400) qQH]`#P
{ ,#kIr
processErrorCode(responseCode); pt}X>ph{
return -2; //-2 represent access is error wLH] <k
} nxl[d\ap+n
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String sHeader; d09k5$=gJ
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for(int i=1;;i++) f-71~
{ x UD-iSY
//DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); 0/oyf]HR
//Utility.log(in.readLine()); 9,"L^W8"k
sHeader=httpConnection.getHeaderFieldKey(i); Y(cGk#0
if(sHeader!=null) ,YMp<C
{ NSDv;|f
if(sHeader.equals("Content-Length")) _zwUE
{ 'uxX5k/D@t
nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); )
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break; Ck|8qUz-
} Ht4;5?/y
} 5kz)5,KjM
else ,c)uX#1
break; 4%3Mb-#Y]
} >cCR2j,r
} go<W( ,O
catch(IOException e){e.printStackTrace ();} =>! Y{:
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catch(Exception e){e.printStackTrace ();} '^"6+ k
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Utility.log(nFileLength); BV[ 5}
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return nFileLength; ;{%\9nS
} {b
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//保存下载信息(文件指针位置) ut I"\1hQ
private void write_nPos() Aj4T"^fv
{ UTH_^HAN#G
try{ Sh8"F@P8
output = new DataOutputStream(new FileOutputStream(tmpFile)); d|yAs5@
output.writeInt(nStartPos.length); }-6)gWe
for(int i=0;i<nStartPos.length;i++) vt9)pMs
{ e;[F\ov%
// output.writeLong(nPos); L-k@-)98
output.writeLong(fileSplitterFetch.nStartPos); ynhmMy%
output.writeLong(fileSplitterFetch.nEndPos); V:c;-)(
} "PpN0Rr
output.close(); c. 2).Jt,
} &@yo;kB
catch(IOException e){e.printStackTrace ();} W!>.$4Q9
catch(Exception e){e.printStackTrace ();} k|H:
} 9c6gkt9eB
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//读取保存的下载信息(文件指针位置) &E=>Hj(dTG
private void read_nPos() UaB @
{ 8{X"h#
try{ 3^6
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DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); 9B7^lR
int nCount = input.readInt(); SV~~Q_U9
nStartPos = new long[nCount]; PJL=$gBgKk
nEndPos = new long[nCount];
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for(int i=0;i<nStartPos.length;i++) Gnq?"</
{ }=]M2}
nStartPos = input.readLong(); 3S}Pm2D2
nEndPos = input.readLong();
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} /
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input.close(); ^*Yh@4\{JH
} ^kB8F"X
catch(IOException e){e.printStackTrace ();} Evjj"h&0J
catch(Exception e){e.printStackTrace ();} 7G>dTO
} Q{5kxw1ZF
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private void processErrorCode(int nErrorCode) n$ou- Q
{ 4s*ZS}]
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System.err.println("Error Code : " + nErrorCode); u;/ Vyu
} x}"uZ$g
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//停止文件下载 5X:*/FuS@
public void siteStop() xM&Wgei]10
{ 8;+B*+%@n
bStop = true; 'GS"8w~j
for(int i=0;i<nStartPos.length;i++) @dPTk"P
fileSplitterFetch.splitterStop(); |* ;B
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} 6U R2IxbE
} [c|]f_ZdK
//负责部分文件的抓取 &bfA.&
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**FileSplitterFetch.java Pf\D-1gi
*/ m4l&
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package NetFox; 5?F__Hx*2
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import java.io.*; ([m
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import java.net.*; Lja>8m
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public class FileSplitterFetch extends Thread { 2bkX}FWd;
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String sURL; //File URL ^Uf]Q$uCjE
long nStartPos; //File Snippet Start Position G'ei/Me6{
long nEndPos; //File Snippet End Position .@@?Pj?)
int nThreadID; //Thread's ID K)DDk9*
boolean bDownOver = false; //Downing is over j;-1J_e5
boolean bStop = false; //Stop identical ^5h]Y;tx
FileAccessI fileAccessI = null; //File Access interface ;E3>ay6m8
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public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException [nrYpb4
{ dE4L=sTEsy
this.sURL = sURL; sE Q=dcK
this.nStartPos = nStart; yEhTNBa*h{
this.nEndPos = nEnd; bj>v|#r^
nThreadID = id; rzm:Yx
fileAccessI = new FileAccessI(sName,nStartPos);//定位 fj;y}t1E]
} n O\"HLM
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public void run() P'Ux%Q+B>
{ /7|V+6jV
while(nStartPos < nEndPos && !bStop) yl7&5)b#9
{ <~n"m
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try{ Wp!%-vzy&
URL url = new URL(sURL); XH}\15X
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); NnDxq%l%
httpConnection.setRequestProperty("User-Agent","NetFox"); 10q'Z}34
String sProperty = "bytes="+nStartPos+"-"; $ us]35Z3
httpConnection.setRequestProperty("RANGE",sProperty); QD:{U8YbF$
Utility.log(sProperty); LXC9I/j/
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InputStream input = httpConnection.getInputStream(); GS a[
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//logResponseHead(httpConnection); )GM41t1i
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byte[] b = new byte[1024]; r0+6evU2
int nRead; SEGri#s
while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) @,cowar*
{ ,D]QxbwZ
nStartPos += fileAccessI.write(b,0,nRead); DVB{2~7 4
//if(nThreadID == 1) -ZRO@&tMD
// Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); N343qU
} Q;43[1&3w
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Utility.log("Thread " + nThreadID + " is over!"); x7jC)M<k0
bDownOver = true; Rn9m]x
//nPos = fileAccessI.write (b,0,nRead); (`c
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} -bT)]gA2
catch(Exception e){e.printStackTrace ();} 'E/^8md>
} D(AXk8Vub
} C/vIEYG4
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//打印回应的头信息 'rO!AcdLU
public void logResponseHead(HttpURLConnection con) WaVtfg$!
{ 17oa69G
for(int i=1;;i++) Q@<S[Qh[.
{ S+atn]eU@
String header=con.getHeaderFieldKey(i); VC\ S'z
if(header!=null) \n8]M\<
//responseHeaders.put(header,httpConnection.getHeaderField(header)); T|7}EAR=b
Utility.log(header+" : "+con.getHeaderField(header)); .<x&IJ /
else gv)P]{%^
break; lOuHVa*}
} \{Z;:,S
} pb
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public void splitterStop() 5q;GIw^L
{
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bStop = true; GqaDL3Niqs
} 7=TF.TW)
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} zr+zhpp
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/* ;#xmQi'`
**FileAccess.java 4'`{H@]tb
*//文件访问(定位,写) 6K-_pg]
package NetFox; '=nQ$/!q
import java.io.*; % NA9{<I
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/ ';0H_
public class FileAccessI implements Serializable{ juka0/
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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 Y;@>b{s
RandomAccessFile oSavedFile; 1zm ulj%&
long nPos; Z~oo;xE
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public FileAccessI() throws IOException B$ajK`x&I
{ .aAL]-Rj
this("",0); u frW\X
} i'H/ZwU
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public FileAccessI(String sName,long nPos) throws IOException Hv
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{ &]e'KdXF
oSavedFile = new RandomAccessFile(sName,"rw"); b J=Jg~&
this.nPos = nPos; TUV&vz{
oSavedFile.seek(nPos); ,SynnE68
} iYORu3
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public synchronized int write(byte[] b,int nStart,int nLen) Bg5Wba%NK
{ PP;}e
int n = -1; +BVym~*^
try{ zVXC1u9B
oSavedFile.write(b,nStart,nLen); Ir`eL
n = nLen; /<@SFF.
} *c~T@m~DR
catch(IOException e) !46RGU:I
{ k9 "[H'
e.printStackTrace (); uD1e!oU
} D7lK30
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return n; '(f&P=[b
} <3xyjX'NE
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} uw[<5
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/* LR.Hh
**SiteInfoBean.java 6+.uU[x@
*/ N^HUijw<
package NetFox; 2^mJ+v<
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public class SiteInfoBean { g!$!F>[
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private String sSiteURL; //Site's URL Ge-CY
private String sFilePath; //Saved File's Path tk!t
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private String sFileName; //Saved File's Name TD'L'm|2
private int nSplitter; //Count of Splited Downloading File aGJC1x
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public SiteInfoBean() :`-,Lbg
{//nSplitter的缺省值为5 OTGofd2zf
//default value of nSplitter is 5 <KE 1f7c
this("","","",5); )~+E[|
} +=q$ x Ia
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public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) MHh~vy'HB5
{ Wc,~ {
sSiteURL= sURL; 0~ZFv Wv
sFilePath = sPath; X9p.gXF
sFileName = sName; 9z}uc@#D=m
this.nSplitter = nSpiltter; M)eO6oX|
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} JRSSn] pw
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public String getSSiteURL() =+U `-J}g
{ ue4Vcf
return sSiteURL; 0J?~N`#O|
} -R57@D>j\
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public void setSSiteURL(String value) ~i~7na|
{ E=e*VEjy
sSiteURL = value; l^|UCgRn
} ]8Q4BW
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public String getSFilePath() 6^]!gR#B
{ E"+QJ~!
return sFilePath; Svondc
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} LXbP 2
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public void setSFilePath(String value) 7on.4/;M
{ ?Cl%{2omO
sFilePath = value; |K.mP4CKY
} Qa.<K{m#?
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public String getSFileName() f!s=(H;
{ Zb1<:[
return sFileName; 2^^`n1?'
} X:6c}p%,!
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public void setSFileName(String value) _59huC.
{ g=QDu7Ux
sFileName = value; LL2=& VK
} 8g&?
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public int getNSplitter() S-k8jm
{ '7+4`E
return nSplitter; cIav&