/* w@2LFDp
**SiteFileFetch.java 5*>3(U
*/ `24:Eg6r
package NetFox; }c,}+{q
import java.io.*; 'lNl><e-
import java.net.*; -/&6}lD
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public class SiteFileFetch extends Thread { ]R{=|
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SiteInfoBean siteInfoBean = null; //文件信息Bean ,K6]Q|U@r
long[] nStartPos; //开始位置 5cQBqH]
long[] nEndPos; //结束位置 i]LK,'
FileSplitterFetch[] fileSplitterFetch; //子线程对象 \9k{"4jX\
long nFileLength; //文件长度 Xl*-A|:j
boolean bFirst = true; //是否第一次取文件 ig/716r|
boolean bStop = false; //停止标志 Gb\7W
File tmpFile; //文件下载的临时信息 |@-WC.
DataOutputStream output; //输出到文件的输出流 6YU2
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//负责整个文件的抓取,控制内部线程(FileSplitterFetch类) c\4n 7m,y
public SiteFileFetch(SiteInfoBean bean) throws IOException iVu+ct-iv
{ z?"5="D
siteInfoBean = bean; JT^E`<nn
//tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); c)E[K-u
tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); I}v'n{5(
if(tmpFile.exists ()) )3B5"b,
{ n7q-)Dv_U
bFirst = false; ?3z+|;t6C
read_nPos(); 3]Lk}0atpL
} TzL40="F
else W@$p'IBwm
{ (\/HGxv
nStartPos = new long[bean.getNSplitter()]; O\KAvoQ%s
nEndPos = new long[bean.getNSplitter()]; c)6Y.[).
} q%:Jmi>
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} sqZHk+<%
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public void run() MthThsr7
{ 47K5[R
//获得文件长度 4l`gAE$
//分割文件 \]OD pi
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//实例FileSplitterFetch o"1us75P
//启动FileSplitterFetch线程 D[#\Y+N
//等待子线程返回 MM8)yCI
try{ };!c]/,
if(bFirst) B=c^ma
{ NJtB ;
nFileLength = getFileSize(); eu:_V+
if(nFileLength == -1) N~ozyIP,
{ -5ec8m8
System.err.println("File Length is not known!"); Y)
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} .CpF0
else if(nFileLength == -2) YYvs~?bAy
{ 6Rf5
System.err.println("File is not access!"); oV!9B -<
} 5~"=Fm<uD
else zm .2L
{ 86I*
for(int i=0;i<nStartPos.length;i++) Hf-F-~E
{ (_08?cN
nStartPos = (long)(i*(nFileLength/nStartPos.length)); `WW0~Tp3
} }I`|*6Up
for(int i=0;i<nEndPos.length-1;i++) 8say"Qz
{ Q8~pIv
nEndPos = nStartPos[i+1]; q%vUEQLBp
} N+V-V-PVk
nEndPos[nEndPos.length-1] = nFileLength; &L?Dogo
} ,RHHNTB("
} A{o{o++
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//启动子线程 XN0Y#l
fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; U+i[r&{gb
for(int i=0;i<nStartPos.length;i++) rh
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{ %%>?<4t
fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), ZF/KV\Ag)
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), .e AC!R
nStartPos,nEndPos,i); I(CI')Q
Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); ,i,=LGn
fileSplitterFetch.start(); nJya1AH;
} Z7/dRc
// fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), {L eEnh-
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1);
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// Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", >dl!Ep
nEndPos = " + nFileLength); N9ufTlq
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// fileSplitterFetch[nPos.length-1].start(); ybG)=0
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//等待子线程结束 `+o.w#cl
//int count = 0; =KZ4:d5
//是否结束while循环 Vel;t<1
boolean breakWhile = false; u@EM,o
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while(!bStop) M5V1j(URE
{ g3XAs@
write_nPos(); A!kyga6F5
Utility.sleep(500); D+3Y.r9
breakWhile = true; aVYUk7_ <
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for(int i=0;i<nStartPos.length;i++) {\&"I|dpe
{ f)x}_dw%
if(!fileSplitterFetch.bDownOver) zOOX>3^
{ iFA"m;$
breakWhile = false; *La =7y:
break; S8RB0^Q7
} &3f.78a
} jQ)>XOok
if(breakWhile) 5!zvoX9
break; \G@6jn1G(
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//count++; `RcNqPY#S
//if(count>4) sriz
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// siteStop(); JY+[
} srLr~^$j[
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System.err.println("文件下载结束!"); eeZysCy+DY
} V2,WP
catch(Exception e){e.printStackTrace ();} n y)P
} YMTA`T(+
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//获得文件长度 syf"{bBe
public long getFileSize() 61/zrMPn
{ 8!GLw-kb
int nFileLength = -1; H|U/tU-
try{ ..!-)q'?
URL url = new URL(siteInfoBean.getSSiteURL()); I uj=d~|>
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); /AW>5r]
httpConnection.setRequestProperty("User-Agent","NetFox"); B7MW" y
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int responseCode=httpConnection.getResponseCode(); %UQB?dkf$
if(responseCode>=400) 'kvFU_)
{ N-9gfG
processErrorCode(responseCode); ^&H=dYcV>/
return -2; //-2 represent access is error A'1AU:d
} R?~h7 d
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String sHeader; jYX9;C;J
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for(int i=1;;i++) \{zAX~k6
{ bV*zMoD#
//DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); A9Wqz"[
//Utility.log(in.readLine()); vfUfrk@D~
sHeader=httpConnection.getHeaderFieldKey(i); Gc!8v}[7J
if(sHeader!=null) s;7qNwYO
{ :V~*vLvR
if(sHeader.equals("Content-Length"))
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{ dMmka
nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); -QPWi2:k
break; u7&'3 ef
} 5MY}(w
} ;nKHm
else B8AzN9v&"N
break; SM+fG: 4d
} kdh9ftm*\
} Df~p'N-$
catch(IOException e){e.printStackTrace ();} (Q8?)
catch(Exception e){e.printStackTrace ();} |p -R9A*>h
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Utility.log(nFileLength); asN
}
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return nFileLength; hdtnC29$
} \41)0,sEy
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//保存下载信息(文件指针位置) C%_
private void write_nPos() (}1v^~FXj
{ `m3QT3B
try{ +^ DRto=
output = new DataOutputStream(new FileOutputStream(tmpFile)); +1Rrkok
output.writeInt(nStartPos.length); eSX[J6
for(int i=0;i<nStartPos.length;i++) !x$:8R
{ JkDPuTXD
// output.writeLong(nPos); #;LMtDaL
output.writeLong(fileSplitterFetch.nStartPos); L\m !8o4
output.writeLong(fileSplitterFetch.nEndPos); <cv2-?L{
} 'gZbNg=&[
output.close(); H<Kkj
} #} ~p^ 0
catch(IOException e){e.printStackTrace ();} ).}k6v[4)
catch(Exception e){e.printStackTrace ();} ,0uo&/Y4L
} [AX"ne#M*
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//读取保存的下载信息(文件指针位置) I\rZk9F
private void read_nPos() xR|eye R
{ D<bU~Gd,P
try{ vDW&pF_eI>
DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); ;eW'}&|LV
int nCount = input.readInt(); H*{k4
nStartPos = new long[nCount]; K@jSr*\'
nEndPos = new long[nCount]; G?1x+H;o5
for(int i=0;i<nStartPos.length;i++) ;4kx >x*H
{ ,V33v<|wc
nStartPos = input.readLong(); IQw
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nEndPos = input.readLong(); r'd:SaU+
} $35,\ZO>
input.close(); }*.:Hv"
} 1]>$5 1Q
catch(IOException e){e.printStackTrace ();} nGx ~)T
catch(Exception e){e.printStackTrace ();} chO'Q+pw
} gj[ >p=Wn
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C}
private void processErrorCode(int nErrorCode) G}P)vfcH
{ ,TF<y#wed
System.err.println("Error Code : " + nErrorCode); 7sud/*+F
} 9V=<| 2
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//停止文件下载 ^V<J69ny|9
public void siteStop() yX7CN5vVl
{ e{fZ}`=7y
bStop = true; W>Mse[6`c
for(int i=0;i<nStartPos.length;i++) \;-=ODC
fileSplitterFetch.splitterStop(); J4gI=@e
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} t7|MkX1
} OgEUq''
//负责部分文件的抓取 S9G8aea/
**FileSplitterFetch.java v#<\:|XAg
*/ 2q"_^deI5*
package NetFox; =MTj4VXh"
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import java.io.*; ]`zjRRd
import java.net.*; b
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public class FileSplitterFetch extends Thread { |`w$|pm=
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String sURL; //File URL fd?bU|I_2
long nStartPos; //File Snippet Start Position h'B9|Cm
long nEndPos; //File Snippet End Position _Fy4DVCg
int nThreadID; //Thread's ID #04{(G|~+E
boolean bDownOver = false; //Downing is over ,'FD}yw4v
boolean bStop = false; //Stop identical $Q8P@L)[
FileAccessI fileAccessI = null; //File Access interface _qY`KP"
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public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException lq1[r~
{ tgO+*q5B
this.sURL = sURL; PSW#^o
this.nStartPos = nStart; R'G'&H{N
this.nEndPos = nEnd; xik`W!1S
nThreadID = id; <9@&oN+T
fileAccessI = new FileAccessI(sName,nStartPos);//定位 "0|BoG
} m9#}X_&x
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public void run() ?N4A9W9
{ ]dd[WHA
while(nStartPos < nEndPos && !bStop)
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{ $!a?i@
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try{ mYjf5
URL url = new URL(sURL); 5\VxXiy0
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); %z1{Kus
httpConnection.setRequestProperty("User-Agent","NetFox"); z8b
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String sProperty = "bytes="+nStartPos+"-"; +``>,O6
httpConnection.setRequestProperty("RANGE",sProperty); d2ohW|
Utility.log(sProperty); &c20x+
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InputStream input = httpConnection.getInputStream(); j,}4TDWa
//logResponseHead(httpConnection); [FB&4>V/
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byte[] b = new byte[1024]; q1UBKhpnH
int nRead; --Oprl
while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) c+1vqbqHG
{
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nStartPos += fileAccessI.write(b,0,nRead); '#H&:Htm;L
//if(nThreadID == 1) {b(rm,%
// Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); ?LM:RADCm
} h>dxBN
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Utility.log("Thread " + nThreadID + " is over!"); b 1cd&e
bDownOver = true; V{KjRSVf=
//nPos = fileAccessI.write (b,0,nRead); O8gfiQqF&
} 1x{XE*%;
catch(Exception e){e.printStackTrace ();} Mz93
} _O$tuC%
} -zprNQW
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//打印回应的头信息 PDhWFF
public void logResponseHead(HttpURLConnection con) r9?o$=T
{ n-d:O\]
for(int i=1;;i++) NNgK:YibD
{ }bp.OV-+
String header=con.getHeaderFieldKey(i); NP "ylMr7P
if(header!=null) 6?O}Q7G
//responseHeaders.put(header,httpConnection.getHeaderField(header)); L4~
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Utility.log(header+" : "+con.getHeaderField(header)); M]1;
else GN0duV
break; N. jA 8X
} rrAqI$6
} +B# qu/By
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public void splitterStop() +1x)z~q=
{ zFOL(s.h|0
bStop = true; !Pw$48cg
} 1ADv?+j)A/
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} wajZqC2yg
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/* o,J^ e_
**FileAccess.java s*f1x N<
*//文件访问(定位,写) qT$)Rb&
package NetFox; Y5n>r@)m
import java.io.*; c88_}%h?(
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public class FileAccessI implements Serializable{ b )Tl*
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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 B_cgWJ*4
RandomAccessFile oSavedFile; :Z[(A"dA
long nPos; 6i| ~7md,
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public FileAccessI() throws IOException :b5XKv^
{ W]zwghxH
this("",0); .ots?Ns
} w
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public FileAccessI(String sName,long nPos) throws IOException {a.
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oSavedFile = new RandomAccessFile(sName,"rw"); T~h.=5
this.nPos = nPos; t?HF-zQ
oSavedFile.seek(nPos); # v+;:
} FJ}gUs{m
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public synchronized int write(byte[] b,int nStart,int nLen) <W2ZoqaV
{ xdqK.Z%
int n = -1; 7C?E z%a@
try{ QAi1,+y]7w
oSavedFile.write(b,nStart,nLen); u3ST;
n = nLen; L@?e:*h
} 12 -EDg/1
catch(IOException e) }Bi@?Sb
{ >C*4_J7
e.printStackTrace (); nSHNis
} \WX@PfL
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return n; -zdmr"CA
} PV(4$I}
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} oBC]UL;8xJ
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/* i&*<lff
**SiteInfoBean.java 50*@.!^*
*/ cf\&No?-p
package NetFox; G1/Gq.<
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public class SiteInfoBean { ~2(]ZfO?>H
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private String sSiteURL; //Site's URL LZa%
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private String sFilePath; //Saved File's Path ~?d>fR:X
private String sFileName; //Saved File's Name E<k^S{
private int nSplitter; //Count of Splited Downloading File {!r#f(?uT
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public SiteInfoBean() ntZ~m
{//nSplitter的缺省值为5 x9D/s`!
//default value of nSplitter is 5 DN<M?u]
this("","","",5); _JA:.V^3gm
} j_V/GnEQ
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public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) TRy^hr8~
{ gH'3 dS!{
sSiteURL= sURL; c 6q/X*
sFilePath = sPath; wPgDy
sFileName = sName; UKj`_a6
this.nSplitter = nSpiltter; V:>`*tlh
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} ST%
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