/* Oz\J+
**SiteFileFetch.java bt1bTo
*/ ,V]FAIJ
package NetFox; z"7?I$NQ
import java.io.*; 2Q(ZW@0
import java.net.*; :n~Mg{j3
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public class SiteFileFetch extends Thread { X(d:!-_m *
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SiteInfoBean siteInfoBean = null; //文件信息Bean /J-.K*xKt
long[] nStartPos; //开始位置 .Gr"|uII
long[] nEndPos; //结束位置 3nhQ^zqf
FileSplitterFetch[] fileSplitterFetch; //子线程对象 9({ 9 r[U
long nFileLength; //文件长度 ={o4lFe3v(
boolean bFirst = true; //是否第一次取文件 {c?{M.R
boolean bStop = false; //停止标志 ^|h_[>
File tmpFile; //文件下载的临时信息 2.);OFk+
DataOutputStream output; //输出到文件的输出流 7?k3jDK
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//负责整个文件的抓取,控制内部线程(FileSplitterFetch类) 1=+S'_j
public SiteFileFetch(SiteInfoBean bean) throws IOException }3Ke
{ VrT-6r'Y
siteInfoBean = bean; U%1M?vT/
//tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); $ta"Ug.z
tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); h-Ks:pcR
if(tmpFile.exists ()) 1n2Pr'|s
{ b?Q$UMAbH
bFirst = false; w(+L&IBC
read_nPos(); ?en-_'}~a
} fOSJdX0e|Q
else ||cI~qg
{ ScInOPb'K
nStartPos = new long[bean.getNSplitter()]; yP-$@Ry
nEndPos = new long[bean.getNSplitter()]; [=.iJ5,{2
} "\9beK:l
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} [}Rs
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public void run() OS
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{ Y~( 8<`^
//获得文件长度 2"
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//分割文件 <|WXFjn
//实例FileSplitterFetch 33}p02#
//启动FileSplitterFetch线程 2}P{7flDY
//等待子线程返回 ~|{e"!(}
try{ 6eB~S)Ko
if(bFirst) V.Lk70 \
{ @Py'SH!-
nFileLength = getFileSize(); =VWH8w.3
if(nFileLength == -1) YyYp-0#
{ l'!_km0{d
System.err.println("File Length is not known!"); %dmQmO,
} I L&PN`#
else if(nFileLength == -2) <dS I"C<
{ ij?]fXf:)y
System.err.println("File is not access!"); QRdtr
} _iqaKYT$
else A5}N[|z
{ = =KDr0|G
for(int i=0;i<nStartPos.length;i++) ;L],i<F
{ Y?oeP^V'u
nStartPos = (long)(i*(nFileLength/nStartPos.length)); 2I=4l
} ms&5Bq+9
for(int i=0;i<nEndPos.length-1;i++) KxJDAP
{ LsMq&a-j2
nEndPos = nStartPos[i+1]; p4uObK,
} *&_(kq z'1
nEndPos[nEndPos.length-1] = nFileLength; +r"fv*g"
} 6: R1jF*eG
} ^#h ;bX#
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//启动子线程 7/=r-
fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; .q 4FGPWz
for(int i=0;i<nStartPos.length;i++) uXGAcUx(
{ loyhNT=
fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), a|dn3R>vX
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), +9;6]4
nStartPos,nEndPos,i); Ni;jMc
Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); EUPc+D3
fileSplitterFetch.start(); e/)Vx'd`+
} T%TO?[cN
// fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), oSR;Im<2
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); sw(|EZ7F
// Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", c/-'^+9
nEndPos = " + nFileLength); }mk z_P(Z
// fileSplitterFetch[nPos.length-1].start(); (
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//等待子线程结束 -?)z@Lc
//int count = 0; 0}>p)k3&A
//是否结束while循环 2tp95E`(O
boolean breakWhile = false; *u>[
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while(!bStop) c5eimA%`
{ Fe 78YDx?
write_nPos(); Og2w]B[
Utility.sleep(500); B1U7z1<
breakWhile = true; .T~Oc'wGo
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for(int i=0;i<nStartPos.length;i++) E@@XWU21;N
{ U]E~7C
if(!fileSplitterFetch.bDownOver) `y&2Bf
{ T' )l
breakWhile = false; ir;az{T#U
break; s<LYSr d
} (=Lx9-u
} N/B-u)?\:
if(breakWhile) gF|u%_y-qt
break; QIcc@PGT9a
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//count++; #/>OW2Ny
//if(count>4) 2J6(TrQ
// siteStop(); s%l^zA(
} #ChF{mh
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System.err.println("文件下载结束!"); a7fn{VU8
} _$gP-J
catch(Exception e){e.printStackTrace ();} S1*xM
} P[gYENQ
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//获得文件长度 to] ~$~Q|>
public long getFileSize() }}d,xI
{ WSx0o}
int nFileLength = -1; $?|$uMIafp
try{ ekSSqj9";
URL url = new URL(siteInfoBean.getSSiteURL()); p}a0z?
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); ^#z*
httpConnection.setRequestProperty("User-Agent","NetFox"); e6'y S81
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int responseCode=httpConnection.getResponseCode(); {=T9_c
if(responseCode>=400) 843O}v'
{ lMb&F[KJ7
processErrorCode(responseCode); -=4:qQEw
return -2; //-2 represent access is error mA\}zLw+r9
} C.=[K_
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String sHeader; B d?{ldg
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for(int i=1;;i++) 5wm(gF_t
{ &jE@i#
//DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); y-a3
//Utility.log(in.readLine()); Zopi;O J
sHeader=httpConnection.getHeaderFieldKey(i); #J*hZ(Pq
if(sHeader!=null) 6F3FcUL
{ d01]5'f?o
if(sHeader.equals("Content-Length")) t$ 3/ZTx
{ QWAtF@qTV
nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader));
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break; SH1)@K-
} Gxh1wqLR
} CdNb&Nyz
else #HmZe98[%
break; [|APMMYK1
} o Yrg;]H
} ze#r/j;sw
catch(IOException e){e.printStackTrace ();} e#|YROHf
catch(Exception e){e.printStackTrace ();} (Ujry =f
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Utility.log(nFileLength); DDp\*6y3l
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return nFileLength; Nu7lPEM
} 4)E$. F^
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//保存下载信息(文件指针位置) <,Pk
private void write_nPos() .%+y_.l
{ D[p`1$E-1v
try{ o6)U\z
output = new DataOutputStream(new FileOutputStream(tmpFile)); ]YKxJ''u
output.writeInt(nStartPos.length); FZ=xy[q]~
for(int i=0;i<nStartPos.length;i++) =nE^zY2m%
{ kuW^_BROJ
// output.writeLong(nPos); #9p|aS\
output.writeLong(fileSplitterFetch.nStartPos); r5'bt"K\>
output.writeLong(fileSplitterFetch.nEndPos); ! +XreCw
} F%G} >xn
output.close(); v8
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} I"2*}v|
catch(IOException e){e.printStackTrace ();} 0K^?QM|S
catch(Exception e){e.printStackTrace ();} K5}0!_)G
} sc$I,|d2
@ x5LrQ_`r
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//读取保存的下载信息(文件指针位置) @*-t.b2k
private void read_nPos() ;><m[ l6
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try{ P$*9Z@
DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); WSOz^]
int nCount = input.readInt(); M^ jEp
nStartPos = new long[nCount]; -qdt$jIM
nEndPos = new long[nCount]; L4or*C^3
for(int i=0;i<nStartPos.length;i++) B PG&R
{ Pd;G c@'~
nStartPos = input.readLong(); 0@kL<\u
nEndPos = input.readLong(); CX#d9
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} :*WiswMFm
input.close(); w7b\?]}@
} WlmkM?@
catch(IOException e){e.printStackTrace ();} ;2l|0:
catch(Exception e){e.printStackTrace ();} W?D-&X^ny
} nG0R1<
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private void processErrorCode(int nErrorCode) p;.M.
{ 0n*D](/NK
System.err.println("Error Code : " + nErrorCode); !TLJk]7uC
} )F,z pGG
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//停止文件下载 dK>sHUu
public void siteStop() v:]z-zU
{ S9dXkd
bStop = true; W}@IUCRs
for(int i=0;i<nStartPos.length;i++) q@vqhE4
fileSplitterFetch.splitterStop(); jR>`Xz
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} 5Kw?#
} i7%`}t
//负责部分文件的抓取 U;t1 K
**FileSplitterFetch.java %BF,;(P
*/ nB6 $*'
package NetFox; O2"5\@HfE
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import java.io.*; 61](a;Di
import java.net.*; 8yk4#CZ
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public class FileSplitterFetch extends Thread { H`1q8}m
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String sURL; //File URL __}ut+H^5p
long nStartPos; //File Snippet Start Position l"/E,X
long nEndPos; //File Snippet End Position HJJ;gTj
int nThreadID; //Thread's ID O~mQ\GlW
boolean bDownOver = false; //Downing is over 2WC$r8E
boolean bStop = false; //Stop identical 17-B'Gl!<%
FileAccessI fileAccessI = null; //File Access interface ;
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public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException RoNE7|gF:
{ 6B+?X5-6DH
this.sURL = sURL; nWA>u J5
this.nStartPos = nStart; w@pJ49
this.nEndPos = nEnd; _ Y7Um
nThreadID = id; g)7@EU2
fileAccessI = new FileAccessI(sName,nStartPos);//定位 X0]{8v%
} k/1S7X[
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public void run() vIf-TQw
{ MV]`[^xQ5
while(nStartPos < nEndPos && !bStop) U9jdb9 |
{ {.ypZ8JU
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try{ \>x1#Vr>#V
URL url = new URL(sURL); RK=Pm7L:`y
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); Iw?*y.z|
httpConnection.setRequestProperty("User-Agent","NetFox"); 0#4A0[vV
String sProperty = "bytes="+nStartPos+"-"; \>||
httpConnection.setRequestProperty("RANGE",sProperty); 2_}oOt?qiM
Utility.log(sProperty); 3)I]bui
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InputStream input = httpConnection.getInputStream(); Gn<0Fy2
//logResponseHead(httpConnection); 5p6/dlN-a
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byte[] b = new byte[1024]; o`G6!
int nRead; -ijzo%&qA
while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) q;*'V9#
{ ESUO I
nStartPos += fileAccessI.write(b,0,nRead); "Mz#1Laby`
//if(nThreadID == 1) =cO5Nt
// Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); IwRP,MQ~
} [5tvdW6Z&
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Utility.log("Thread " + nThreadID + " is over!"); K+"3He
bDownOver = true; ;A4j_8\[
//nPos = fileAccessI.write (b,0,nRead); N3N~z1x0h
} gu:vf/
catch(Exception e){e.printStackTrace ();} F{^\vFp
} Z_fwvcZ?05
} P^!g0K
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//打印回应的头信息 :{4C2qK>
public void logResponseHead(HttpURLConnection con) \;KSx3o
{ [ r
for(int i=1;;i++) $41<ldJ
{ "?<(-,T
String header=con.getHeaderFieldKey(i); /GX>L)
if(header!=null) ^4NRmlb
//responseHeaders.put(header,httpConnection.getHeaderField(header)); .)=*Yr M
Utility.log(header+" : "+con.getHeaderField(header)); 9yaTDxB>
else TQb@szp:|
break; rIb~@cR)
} y4l-o
} +~
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public void splitterStop() d2d8,Vg
{ &n6L;y-
bStop = true; E0/>E
} #-PMREgO
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} WrcmC$ff
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/* 5*+DN
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**FileAccess.java 'J3yJ{
*//文件访问(定位,写) !Z |_3
package NetFox; 4_ypFuS ^
import java.io.*; _>n)HG
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public class FileAccessI implements Serializable{ a6cU<(WDeh
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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 .c&&@>m@.
RandomAccessFile oSavedFile; tzfyS#E
long nPos; M$.bC0}T
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public FileAccessI() throws IOException wN10Drc
{ SvQ|SKE':
this("",0); SjpCf8Z(
} *aC[Tv[-P
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public FileAccessI(String sName,long nPos) throws IOException -G@uB_C s
{ 6P}?+ Gc
oSavedFile = new RandomAccessFile(sName,"rw"); ~k-'
this.nPos = nPos; %rJDpB{
oSavedFile.seek(nPos); @*~yVV!5
} A,t g268
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public synchronized int write(byte[] b,int nStart,int nLen) GD)paTwO<
{ xb%Q[V_m
int n = -1; 7w" !"W#
try{ vea{o35!
oSavedFile.write(b,nStart,nLen); lR7;{zlSf'
n = nLen; _
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} H! 5Ka#B
catch(IOException e) 8+dsTX`|S
{ JP0aNu
e.printStackTrace (); -^yc<%U
} fZr{x$]N0
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return n; uL-kihV:-
} &=*1[ j\
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} re/u3\S
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/* #<B?+gzFM{
**SiteInfoBean.java H.]V-|U
*/ T^v o9~N*
package NetFox; E;4B!"Q8
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public class SiteInfoBean { r>|S4O
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private String sSiteURL; //Site's URL Sin)]zG~0
private String sFilePath; //Saved File's Path UMBeY[?
private String sFileName; //Saved File's Name xi.?@Lff
private int nSplitter; //Count of Splited Downloading File #:yAi_Ct
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public SiteInfoBean() 3!@&7@p
{//nSplitter的缺省值为5 #y7 MB6-
//default value of nSplitter is 5 +PLJ
this("","","",5); RA!m,"RM
} mt0v (
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