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**SiteFileFetch.java pz:$n_XC}
*/ 1x V~EX
package NetFox; /e!/
import java.io.*; UFyGp>/06
import java.net.*; R5H
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public class SiteFileFetch extends Thread { ?MPM@9
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SiteInfoBean siteInfoBean = null; //文件信息Bean O (tcu@vfl
long[] nStartPos; //开始位置 q(\$-Dk.Vv
long[] nEndPos; //结束位置 k&n7_[]n
FileSplitterFetch[] fileSplitterFetch; //子线程对象 pW:U|m1dS
long nFileLength; //文件长度 !,V8?3.aJn
boolean bFirst = true; //是否第一次取文件 `i9WnPRt
boolean bStop = false; //停止标志 2Qc&6-;`
File tmpFile; //文件下载的临时信息 s^AQJ{X
DataOutputStream output; //输出到文件的输出流 %$:js4
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//负责整个文件的抓取,控制内部线程(FileSplitterFetch类) !Z<GUblt
public SiteFileFetch(SiteInfoBean bean) throws IOException 'N,x=1R5
{ )tz8(S
siteInfoBean = bean; i5(_.1X<#{
//tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); t8U)za
tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); TEE$1RxV(
if(tmpFile.exists ()) RCND|X
{ Njc3X@4=
bFirst = false; YM1tP'4j@
read_nPos(); jQ4Pv`
} =3a`NO5!
else F<Z"W}I+6
{ o//N"S.)
nStartPos = new long[bean.getNSplitter()]; kVe^g]F
nEndPos = new long[bean.getNSplitter()]; *O$kF.3q
} @>ONp|}@qI
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} H-1@z$p
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public void run() vJtQ&,zG
{ YxGIv8O]
//获得文件长度 !MTm4Ls
//分割文件 3-hu'xSU
//实例FileSplitterFetch G"O%u|7
//启动FileSplitterFetch线程 $QNfy.6Tn
//等待子线程返回 }]=b%CPJh+
try{ f|m.v
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if(bFirst) Lyt6DvAp"
{ XFG]%y=/6
nFileLength = getFileSize(); \%mR*J+
if(nFileLength == -1) 8W[QV
{ B5=L</Aj
System.err.println("File Length is not known!"); v\n!Li H
} ~ Y4H)r
else if(nFileLength == -2) E@0wt^
{ E{wVf_K
System.err.println("File is not access!"); FK
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} U%t:]6d&}
else OAOG&6xu8
{ D<5gdIw
for(int i=0;i<nStartPos.length;i++) /U N%P2>^1
{ *yiJw\DRN
nStartPos = (long)(i*(nFileLength/nStartPos.length)); sN5x\9U
} NV36Q^Am[
for(int i=0;i<nEndPos.length-1;i++) HTQ.kV
{ eq(|%]a=
nEndPos = nStartPos[i+1]; |>j=#2
} rZKv:x}{6
nEndPos[nEndPos.length-1] = nFileLength; No=f&GVg
} O|4~$7
} \^|ncu:T
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//启动子线程 X'7 T" 5!
fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; cK@O)Ko}
for(int i=0;i<nStartPos.length;i++) bsP:tFw>
{ 0=t_a]+
fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), AH`tkPd
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), O JvEq@
nStartPos,nEndPos,i); uLe+1`Y5Ux
Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); dbB2/RI
fileSplitterFetch.start(); *>$'aQ
} sFC1PdSk4T
// fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), h&h]z[r R
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); }\J oE4
// Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", nITr5$f
nEndPos = " + nFileLength); va~:oA
// fileSplitterFetch[nPos.length-1].start(); _~HGMC)
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//等待子线程结束 h*_r='
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//int count = 0; ]r'b(R; S
//是否结束while循环 D 67H56[
boolean breakWhile = false; ?# ,\,
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while(!bStop) wUh'1D<(r
{ qe`W~a9x
write_nPos(); cvn,&G-`
Utility.sleep(500); [M FV:Z
breakWhile = true; P@k
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for(int i=0;i<nStartPos.length;i++) */O6cF7
{ 7QQ3IepP
if(!fileSplitterFetch.bDownOver) m4>v S
{ +&(sZFW5o
breakWhile = false; '9{H(DA
break; I/XVo2Ee
} pC_2_,6$
} $Snwx
if(breakWhile) ]2h~Db=
break; H# 2'\0u
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//count++; <0JW[m
//if(count>4) <9\_b6
// siteStop(); zh*NRN
} <:q]t6]$
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System.err.println("文件下载结束!"); \DeZY97p%
} tnRq?
catch(Exception e){e.printStackTrace ();} T(J&v|FK
} eHPGzNXb
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//获得文件长度 DFE?H
public long getFileSize() @@SG0YxZ
{ j><.tA~i
int nFileLength = -1; li/IKS)e$
try{ J*a`qU
URL url = new URL(siteInfoBean.getSSiteURL()); `=q)-y_C
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); <:RU,
httpConnection.setRequestProperty("User-Agent","NetFox"); NFmB ^@k
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int responseCode=httpConnection.getResponseCode(); c9r2kc3cy{
if(responseCode>=400) jUW{Z@{U
{ (Pvch!
processErrorCode(responseCode); %8S!l;\H5
return -2; //-2 represent access is error n+Fl|4
} -bZ^A~<O,
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String sHeader; Bk?M F6
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for(int i=1;;i++) oVc_(NH-
{ =]Qu"nRB
//DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); ro^Y$;G
//Utility.log(in.readLine()); ``>WFLWTn
sHeader=httpConnection.getHeaderFieldKey(i); "b-6kM
if(sHeader!=null) m(*CuM[E
{ (doFYF~w
if(sHeader.equals("Content-Length")) G>*s+
{ ywi
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nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); 6`X#<#_&
break; ugUV`5w
} j&Z:|WniK
} i>b^n+74>
else BR"*-$u0;
break; /F/`?=1<$
} i&"I/!3Q@
} 3YA !2
catch(IOException e){e.printStackTrace ();} urXM}^
catch(Exception e){e.printStackTrace ();} iwrdZLE
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Utility.log(nFileLength); T'fE4}rY
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return nFileLength; S`"IM?
} 0~an\4nh
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//保存下载信息(文件指针位置) lyv9eM
private void write_nPos() 1)%9h>F7
{ s{<rc>
try{ MEq
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output = new DataOutputStream(new FileOutputStream(tmpFile)); 1wGd5>GDA
output.writeInt(nStartPos.length); NZdQz
for(int i=0;i<nStartPos.length;i++) i aP+Vab
{ %<I0-o
// output.writeLong(nPos); ?A,gDk/#
output.writeLong(fileSplitterFetch.nStartPos); 8.]dThaq
output.writeLong(fileSplitterFetch.nEndPos); nCXIWLw
} o?/N4$&5l
output.close(); @f{)]I +f
} [4t_ 83
catch(IOException e){e.printStackTrace ();} f[h=>O
catch(Exception e){e.printStackTrace ();} ke)3*.Y%C
} "o=h /q5&
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//读取保存的下载信息(文件指针位置) }JrM!'
private void read_nPos() BD,~M*%z
{ F}i rCi47c
try{ !Y`nKC(=z
DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); 36&7J{MU
int nCount = input.readInt(); _3hCu/BV
nStartPos = new long[nCount]; kTs)u\r.
nEndPos = new long[nCount]; iK=H9j
for(int i=0;i<nStartPos.length;i++) .:_dS=ut
{ 3vVhE,1N
nStartPos = input.readLong(); F
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nEndPos = input.readLong(); ,ulTZV
} DRf~l9f
input.close(); B3XVhUP
} 4?72TBl]
catch(IOException e){e.printStackTrace ();} fN8A'p[
catch(Exception e){e.printStackTrace ();} h/eKVRGs"
} kwZC3p\\
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private void processErrorCode(int nErrorCode) HTkce,dQ
{ 6q6&N'We
System.err.println("Error Code : " + nErrorCode); Dzc 4J66
} ~''qd\.f$
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//停止文件下载 o"QpV
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public void siteStop() ^ /:]HG
{ 8>Ervi`
bStop = true; v%86JUlK.
for(int i=0;i<nStartPos.length;i++) &AOw(?2
fileSplitterFetch.splitterStop(); P%B1dRa
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} j!:U*}f
} #@lr$^M
//负责部分文件的抓取 -v >BeVF
**FileSplitterFetch.java iT9cw`A^%
*/ YN"102CK
package NetFox; ?aO%\<b
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import java.io.*; .yg"!X
import java.net.*; ,MOB+i(3*u
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public class FileSplitterFetch extends Thread { ukq9Cjs
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String sURL; //File URL EX8]i,s|E
long nStartPos; //File Snippet Start Position Mk,8v],-Tj
long nEndPos; //File Snippet End Position kDO6:sjR7
int nThreadID; //Thread's ID .B#Lt,m
boolean bDownOver = false; //Downing is over C'7W50b
boolean bStop = false; //Stop identical :qgdn,Me
FileAccessI fileAccessI = null; //File Access interface wrGd40
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public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException /x-Ja[kL
{ :Q$3P+6 a
this.sURL = sURL; f_.1)O'83
this.nStartPos = nStart; |(XV '-~
this.nEndPos = nEnd; fa5($jJ&
nThreadID = id; hO{@!H$l
fileAccessI = new FileAccessI(sName,nStartPos);//定位 xH3SVn(I
} jCKRoao
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public void run() ecf<(Vl}
{ >[
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while(nStartPos < nEndPos && !bStop) 3^1)W!n/
{ HzH_5kVW
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try{ {
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URL url = new URL(sURL); 0Xk;X1Xl
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); w[4SuD
httpConnection.setRequestProperty("User-Agent","NetFox"); R&PQ[ Xc
String sProperty = "bytes="+nStartPos+"-"; a7#Eyw^H{
httpConnection.setRequestProperty("RANGE",sProperty); Hvor{o5|tB
Utility.log(sProperty); ,u~\$Az6
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InputStream input = httpConnection.getInputStream(); mn0QVkb}lc
//logResponseHead(httpConnection); 4_r8ynq{z
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byte[] b = new byte[1024]; hw~cS7
int nRead; nwcT8b87J
while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) B#EF/\5
{ r<C^hs&]
nStartPos += fileAccessI.write(b,0,nRead); o~es>;
//if(nThreadID == 1) z{!wQ~
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// Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); tEP^w
} Kau*e8
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Utility.log("Thread " + nThreadID + " is over!"); a[9;Okm#
bDownOver = true; Wuc,Cjm9(!
//nPos = fileAccessI.write (b,0,nRead); ]*zF#Voc
} NG5H?hVN=
catch(Exception e){e.printStackTrace ();} 5bZ`YO
} >(%im:_
} K<+AJ(C
* k=L
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//打印回应的头信息 j#!J
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public void logResponseHead(HttpURLConnection con) _DJ0MR~3
{ 5l(;+#3y/
for(int i=1;;i++) OtQKDpJq
{ UK&E#i
String header=con.getHeaderFieldKey(i); G ROl9xp2
if(header!=null) b[RBp0]x
//responseHeaders.put(header,httpConnection.getHeaderField(header)); ch :428
Utility.log(header+" : "+con.getHeaderField(header)); %@pTEhpF
else g08=D$P
break; k"Sw,"e>+
} #"7:NR^H^
} Y71b
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public void splitterStop() rt~X(S
{ pF"z)E|^
bStop = true; by8d18:it
} xYwbbFGrG
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} ?pQ, 5+8
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/* tbOe,-U-@
**FileAccess.java R9=,T0Y
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*//文件访问(定位,写) jv_sRV
package NetFox; xR1g
import java.io.*; 09x\i/nb
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public class FileAccessI implements Serializable{ %
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[;I.aT}R!;
//RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 ~r=TVHjqi
RandomAccessFile oSavedFile; |:
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long nPos; :;??!V
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public FileAccessI() throws IOException m+uh6IqN./
{ F ^E(AE
this("",0); u)Y#&q