/* l0sBXs`3b
**SiteFileFetch.java q@6Je(H
*/ by{ *R
package NetFox; "KhVS
import java.io.*; c8=@s#
import java.net.*; =I6u*$9<
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public class SiteFileFetch extends Thread { a=%QckR*
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SiteInfoBean siteInfoBean = null; //文件信息Bean g218%i
long[] nStartPos; //开始位置 BGSqfr1F
long[] nEndPos; //结束位置 5"cYZvGkJ
FileSplitterFetch[] fileSplitterFetch; //子线程对象 >_m4
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long nFileLength; //文件长度 RO9oO7S
boolean bFirst = true; //是否第一次取文件 Q&;d7A.@
boolean bStop = false; //停止标志 LqOjVQxz
File tmpFile; //文件下载的临时信息 rjJ-ZRs\
DataOutputStream output; //输出到文件的输出流 v."0igMO
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//负责整个文件的抓取,控制内部线程(FileSplitterFetch类) DP-euz
public SiteFileFetch(SiteInfoBean bean) throws IOException *K}j>A
{ I8]q~Q<-P
siteInfoBean = bean; <Ky6|&!
//tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); J@4,@+X
tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); HbUadPr
if(tmpFile.exists ()) $S(q;Y
{ ]L?DV3N
bFirst = false; (!iGQj(m
read_nPos(); rQ!X
} p#T^o]+
else "v9i;Ba>+
{ YJ[Jo3M@j0
nStartPos = new long[bean.getNSplitter()]; c~=yD:$
nEndPos = new long[bean.getNSplitter()]; FhyA_U%/nF
} 5(}Qg9%
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} {k#RWDespy
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public void run() ?{bAyh/
{ ?t{ 2y1
//获得文件长度 nOE 1bf^l
//分割文件 kl90w
//实例FileSplitterFetch "VfV;)]|w
//启动FileSplitterFetch线程 4qc0QA%
//等待子线程返回 3"pl="[*
try{ TiF2c#Q*y
if(bFirst) ;&9A
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{ |##rs
nFileLength = getFileSize(); _?IP}} jA:
if(nFileLength == -1) )ZP-t!).G#
{ >aaHN1Ca
System.err.println("File Length is not known!"); _H(:$=$Q
} HR>
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else if(nFileLength == -2) [61T$ .
{ WV8?zB1
System.err.println("File is not access!"); lW8!_h"G`n
} NL-<K
else !]v &/
{ NxyrP**j
for(int i=0;i<nStartPos.length;i++) g^qbd$ }
{ FlPPz
nStartPos = (long)(i*(nFileLength/nStartPos.length)); +l,6}tV9
} o3oAk10
for(int i=0;i<nEndPos.length-1;i++) YV 5kzq
{ ZvS|a~jO
nEndPos = nStartPos[i+1]; E{-W#}#
} KJf~9w9U
nEndPos[nEndPos.length-1] = nFileLength; 5jYZ+OB
} ny,a5zEnF
} ^:yg,cS|Be
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//启动子线程 npW1Z3n
fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; v G7aT
for(int i=0;i<nStartPos.length;i++) ^z^ UFW
{ <f'2dT@6
fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), xg>AW Q
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), jP-=x(
nStartPos,nEndPos,i); ji|`S\u#b
Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); H:DTvv8e{
fileSplitterFetch.start(); LE"t'R
} Y.<&phv
// fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), p^s k?E
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); )L%i"=<Bdy
// Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", &>Ko}?w
nEndPos = " + nFileLength); J6)&b7
// fileSplitterFetch[nPos.length-1].start(); mOUIGlv
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//等待子线程结束 SuHv{u45
//int count = 0; s|1BqoE
//是否结束while循环 k$hNibpkt
boolean breakWhile = false; ;{Sgv^A
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while(!bStop) VS:UVe
{ cVR3_e{&H
write_nPos(); =>0+BD
Utility.sleep(500); #]@<YKoV{
breakWhile = true; zP|y3`.52
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for(int i=0;i<nStartPos.length;i++) LQnkpy3A
{ jmAQ!y|W.
if(!fileSplitterFetch.bDownOver) 0V:DeX$bZ
{ :jFKTG
breakWhile = false; !"dbK'jb^
break; SQZUkKfb
} u
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} ||lI_B
if(breakWhile) .o2]ndT/J
break; iZVMDJ?(Z]
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//count++; tkG0xRH
//if(count>4) bs%lMa.o
// siteStop(); C XQPbt[5
} 4@wH4H8
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System.err.println("文件下载结束!"); Y{ho[%
} \qrSJ=}t
catch(Exception e){e.printStackTrace ();} R7L:U+*V"
} +b7}R7:AFH
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//获得文件长度 ,=9e]pQ
public long getFileSize() Dm=Em-ST6
{ [U]ouh)
int nFileLength = -1; sI
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try{ [Z5Lgg&
URL url = new URL(siteInfoBean.getSSiteURL()); hm%'k~
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); 2>.2H
httpConnection.setRequestProperty("User-Agent","NetFox"); R|%R-J]
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int responseCode=httpConnection.getResponseCode(); P}%0YJ$6
if(responseCode>=400) J{gqm
{ Sd3KY9,
processErrorCode(responseCode); 4DVkycM
return -2; //-2 represent access is error u#8J`%g
} b"ypS7
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String sHeader; VK*2`Z1
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for(int i=1;;i++) U8Pnt|0 M
{ H<M
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//DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); ]U]22I'+$2
//Utility.log(in.readLine()); C*}TY)8
sHeader=httpConnection.getHeaderFieldKey(i); NX$S^Z\QI
if(sHeader!=null) ^KU:5Bn
{ i>9/vwe
if(sHeader.equals("Content-Length")) CjzfU*G
{ o|7]8K=
nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); rAdYBr=0
break; B/i`
} web=AQ5I4
} jb' hqz
else p%A(5DE
break; BX|+"AeF
} "+REv_:
} L%8>deE>;D
catch(IOException e){e.printStackTrace ();} p_$03q>oQ
catch(Exception e){e.printStackTrace ();} `eIX*R
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Utility.log(nFileLength); 5#zwdoQ
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return nFileLength; Ve,_;<F]S
} 1NO<K`
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//保存下载信息(文件指针位置) \o^M ,yI
private void write_nPos() K?_4|
{ }N_9&I
try{ _/"m0/,
output = new DataOutputStream(new FileOutputStream(tmpFile)); uc?QS~H&w
output.writeInt(nStartPos.length); k;p:P ?s5Y
for(int i=0;i<nStartPos.length;i++) H1uNlPT
{ MOJ-q3H^W
// output.writeLong(nPos); 6&=xu|M<x=
output.writeLong(fileSplitterFetch.nStartPos); ]@o p
output.writeLong(fileSplitterFetch.nEndPos); (9h{7<wD`
} fW Vd[zuD4
output.close(); D-.XSIEMu
} Ox"4 y
catch(IOException e){e.printStackTrace ();} ?aInn:FE
catch(Exception e){e.printStackTrace ();} k/vE|
} Q)}sX6TB
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//读取保存的下载信息(文件指针位置) Bv$;yR
private void read_nPos() tw8@&8"
{ yV:DR
try{ <CL0@?*i9
DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); D"F5-s7
int nCount = input.readInt(); jxL5L[
nStartPos = new long[nCount]; Ys10r-kDS
nEndPos = new long[nCount]; +XU*NAD,!
for(int i=0;i<nStartPos.length;i++) s>
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{ VdR5ZP
nStartPos = input.readLong(); CTt3W>'=+
nEndPos = input.readLong(); 06I'#:]
} $|!VP'VI
input.close(); {A4"KX(U
} A%n
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catch(IOException e){e.printStackTrace ();} M_V\mYC8I
catch(Exception e){e.printStackTrace ();} M'D;2qo
} c"%XE#D
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private void processErrorCode(int nErrorCode) 7ZHM;_
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{ -^8gZk/(W
System.err.println("Error Code : " + nErrorCode); t&u,Od
} $Q1:>i@I|g
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//停止文件下载 -p`hevRr
public void siteStop() KcVCA
{ 4E:HO\
bStop = true; ]yN]^%PYH
for(int i=0;i<nStartPos.length;i++) OWCd$c_(
fileSplitterFetch.splitterStop(); mFOuE5
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} !z X`M1J
} /ocdAW`0
//负责部分文件的抓取 +Ij>\;vM"
**FileSplitterFetch.java 8QDRlF:;<
*/ -MoI{3a
package NetFox; RX:\@c&
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import java.io.*; PdJtJqA8h\
import java.net.*; }:YS$'by
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public class FileSplitterFetch extends Thread { F<X)eO]tk
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String sURL; //File URL V@<tIui$
long nStartPos; //File Snippet Start Position 5KU}dw>*g
long nEndPos; //File Snippet End Position 13s!gwE)
int nThreadID; //Thread's ID >+R`3|o
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boolean bDownOver = false; //Downing is over q~.\NKc
boolean bStop = false; //Stop identical Q4-d2I>0
FileAccessI fileAccessI = null; //File Access interface qHg\n)R"x!
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public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException mgX0@#wFn
{ `DO`c>>K
this.sURL = sURL; YEAiL C+q
this.nStartPos = nStart; uXW<8(
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this.nEndPos = nEnd; |4pE"6A
nThreadID = id; Fs<kMT
fileAccessI = new FileAccessI(sName,nStartPos);//定位 -DhF> 4f
} '0U+M{
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public void run() S1wt>}w0$
{ Nqp%Z7G
while(nStartPos < nEndPos && !bStop) / O6n[qj|
{ z}yntY]n
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try{ 3zY"9KUN
URL url = new URL(sURL); ?s #DD,
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); "P.7FD
httpConnection.setRequestProperty("User-Agent","NetFox"); VR2BdfKU,
String sProperty = "bytes="+nStartPos+"-"; ,\4@Ao
httpConnection.setRequestProperty("RANGE",sProperty); \TkBV?W
Utility.log(sProperty); pNr3u
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InputStream input = httpConnection.getInputStream(); SQWwxFJ
//logResponseHead(httpConnection); EU
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byte[] b = new byte[1024]; 2X;,s`)
int nRead; BgJ;\NV
while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) /A[AHJ<[?
{ ' ~ lC85
nStartPos += fileAccessI.write(b,0,nRead); YN9ug3O+
//if(nThreadID == 1) FVT_%"%C9
// Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); ]pl g@
} T/MbEqAf
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Utility.log("Thread " + nThreadID + " is over!"); c^}gJ
bDownOver = true; yAG4W[
//nPos = fileAccessI.write (b,0,nRead); :)t1>y>3
} Qr1%"^4
catch(Exception e){e.printStackTrace ();} nsij;C
} i*..]!7e
} z<ptrH
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//打印回应的头信息 ueZ `+g~gg
public void logResponseHead(HttpURLConnection con) 5[]7baO)h1
{ \=v7'Hp
for(int i=1;;i++) XUfj 0
{ "]JE]n}Ulg
String header=con.getHeaderFieldKey(i); N-]h+Cnyu
if(header!=null) x&+/da-E/5
//responseHeaders.put(header,httpConnection.getHeaderField(header)); ~0>g 4
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Utility.log(header+" : "+con.getHeaderField(header)); iW+ZI6@
else
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break; {6~v oVkj
} C^K?"800
} Q?L-6]pg
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public void splitterStop() 4&!`Yi_1L
{ }I}Rq D:`
bStop = true; x,@cU}D
} Jj*XnL*
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} 2Prr:k
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/* &sh
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**FileAccess.java 0SwWLq
*//文件访问(定位,写) J1YP-:
package NetFox; ,m{Zn"?kS
import java.io.*; ]L^X}[SH
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public class FileAccessI implements Serializable{ 1&ZG6#16q
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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 BOrfKtG\
RandomAccessFile oSavedFile; ~zi6wu(3
long nPos; @ >%I\
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public FileAccessI() throws IOException 1mwb&j24n3
{ @E{c P%fv
this("",0); vK!,vKa.
} F/tBr%RV
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public FileAccessI(String sName,long nPos) throws IOException ={~`0,
{ Z`o}xV
oSavedFile = new RandomAccessFile(sName,"rw"); [~`;
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this.nPos = nPos; A 7'dD$9
oSavedFile.seek(nPos); J)oa:Q
} cT`x,2
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public synchronized int write(byte[] b,int nStart,int nLen) eY"y[
{ `E8m>q Ss
int n = -1; ]QJLES
try{ L}P<iB
oSavedFile.write(b,nStart,nLen); 2shr&Mfp[
n = nLen; m@;X%wf<U
} UN'hnqC
catch(IOException e) CtTG`)"|
{ _FeLSk.
e.printStackTrace (); 4>uz'j<
} @C0{m7q
) 2wof(
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return n; 4 C/
} 1u:OzyJy
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} :iD([V
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/* R;.zS^LL
**SiteInfoBean.java sEt5!&