/* U
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**SiteFileFetch.java bB^SD] }C
*/ D/jS4'$vA
package NetFox; @'K+
import java.io.*; e:BKdZGW
import java.net.*; CPI7&jqu
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public class SiteFileFetch extends Thread { 8#Q=CTjF
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SiteInfoBean siteInfoBean = null; //文件信息Bean 0%
long[] nStartPos; //开始位置 ((U-JeFW
long[] nEndPos; //结束位置 S> f8j?n
FileSplitterFetch[] fileSplitterFetch; //子线程对象 sQT0y(FW
long nFileLength; //文件长度 T1@]:`&
boolean bFirst = true; //是否第一次取文件 YdgaZJs
boolean bStop = false; //停止标志 j
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File tmpFile; //文件下载的临时信息 Q6cF<L`bW
DataOutputStream output; //输出到文件的输出流 #_tixg
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//负责整个文件的抓取,控制内部线程(FileSplitterFetch类) /&>6#3df-
public SiteFileFetch(SiteInfoBean bean) throws IOException HDyus5g
{ K4vl#*qn
siteInfoBean = bean; O; qerE?i`
//tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); X9f!F2x
tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); Q<y&*o3YF|
if(tmpFile.exists ()) eeuTf
{ %#rH~E
bFirst = false; 3N) bJ
read_nPos(); s!q6OVJ-
} +fd^$Qd%K
else [T;0vv8
{ O)'Bx=S4Ke
nStartPos = new long[bean.getNSplitter()]; pI>i1f=W
nEndPos = new long[bean.getNSplitter()]; mCFScT
} zY<=r.m4
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} |wKC9 O@%
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public void run() +2kJuoj:
{ d/8I&{.
//获得文件长度 -d+q +l>0
//分割文件 F/\w4T
//实例FileSplitterFetch s%nx8"
//启动FileSplitterFetch线程 M@rknq@
//等待子线程返回 (u81p
try{ ^D(N_va<
if(bFirst) yWa-iHWC
{ @N`) Z3P+
nFileLength = getFileSize(); ocCC63J
if(nFileLength == -1) V:rq}F}
{ |?CR|xqT
System.err.println("File Length is not known!"); MfhJb_q`
} i0ax`37
else if(nFileLength == -2) uI7 d?s
{ >A#wvQl7
System.err.println("File is not access!"); H gMLh*
} oagxTFh8~
else ZPWY0&9
{ =PiDZS^"
for(int i=0;i<nStartPos.length;i++) oHkF>B
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nStartPos = (long)(i*(nFileLength/nStartPos.length)); %EYh5W
} k:nR'TI
for(int i=0;i<nEndPos.length-1;i++) "q(#,,_
{ PW"G]G,
nEndPos = nStartPos[i+1]; 'v.i' 6
} .
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nEndPos[nEndPos.length-1] = nFileLength; UH1AT#?!W
} @~0kSA7
} 9"g=it2Rh6
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//启动子线程 > $0eRVL
fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; "ZDc$v:Qa
for(int i=0;i<nStartPos.length;i++) N.OC _H&
{ wkK61ah6
fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), 0[@9f1Nk4
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), c#M'Mye
nStartPos,nEndPos,i); (.,`<rXw
Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); cQ~}qE>I
fileSplitterFetch.start(); f?T6Ne'
} h4x*C=?A
// fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), E(A7D XzbR
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); mw9;LNi\D
// Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", z5PFppSQ
nEndPos = " + nFileLength); OJn g
// fileSplitterFetch[nPos.length-1].start(); S?Q4u!FC
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//等待子线程结束 R9Wh/@J]
//int count = 0; 5;5;bBo~
//是否结束while循环 $F-qqkR$
boolean breakWhile = false; _IJPZ'Hr
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while(!bStop) 7Wb:^.d
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{ ,Ju f
write_nPos(); qepsR/0M
Utility.sleep(500); l$D]*_ jc,
breakWhile = true; EotZ$O=
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for(int i=0;i<nStartPos.length;i++) %;kr%%t%
{ )NJD+yQ%
if(!fileSplitterFetch.bDownOver) z5-vx `
{ R,CFU l7Q
breakWhile = false; jPg 8>Z&D
break; EzOO6
} 2@ vSe
} -M}#-qwf
if(breakWhile) cUssF%ud]
break; ]YQ[ )
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//count++; k`Nc<nN8
//if(count>4) l`8S1~j
// siteStop(); 1a4HThDXP
} ?ihkV?;)
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System.err.println("文件下载结束!"); n5dFp%k
} @0A7d
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catch(Exception e){e.printStackTrace ();} @mBZu!,
} N*w/\|
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//获得文件长度 <CIJg*
public long getFileSize() ko\VDyt,
{ s@sRdoTdF
int nFileLength = -1; k"F5'Od
try{ b=v
URL url = new URL(siteInfoBean.getSSiteURL()); ^Ts|/+}'i
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); o5KpiibFM
httpConnection.setRequestProperty("User-Agent","NetFox"); 57IAH$n8o
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int responseCode=httpConnection.getResponseCode(); f$$l,wo
if(responseCode>=400) :&ir5xHS
{ E>f+ E8?
processErrorCode(responseCode); B9pro%R1Bo
return -2; //-2 represent access is error j+AAhn
} n;8[WR)
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String sHeader; (&R/ns~
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for(int i=1;;i++) 3jQy"9f
{ Sc'z vlq
//DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); : xI SS
//Utility.log(in.readLine()); (#GOXz
sHeader=httpConnection.getHeaderFieldKey(i); OW1i{
if(sHeader!=null) I\E`xkbBu
{ !Kr|04Qp#x
if(sHeader.equals("Content-Length")) <6g{vNA
{ NNSHA'F,.\
nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); C o v,#j j
break; [sJ f)<
} P3X;&iT
} O?e38(
else %LeG.~?
break; $,$bZV
} K|nh`r
} =TKu2
catch(IOException e){e.printStackTrace ();} yq+'O&+
catch(Exception e){e.printStackTrace ();} bb}zn'xC
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Utility.log(nFileLength); N9hs<b+N_
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return nFileLength; 0o~? ]C
} KDr?<"2L
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//保存下载信息(文件指针位置) 6L[ Yn?;
private void write_nPos() u;p.:{'
{ o))z8n?b
try{ m
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output = new DataOutputStream(new FileOutputStream(tmpFile)); d_s=5+Yj
output.writeInt(nStartPos.length); L+,p#w
for(int i=0;i<nStartPos.length;i++) %+gYZv-
{ =Hplg>h)
// output.writeLong(nPos); AsJN~<0h
output.writeLong(fileSplitterFetch.nStartPos); I3`WY-uv
output.writeLong(fileSplitterFetch.nEndPos); 5%,5Xe4p
} E~vM$$O$
output.close(); tY~gn|M
} .vsrZ_y?
catch(IOException e){e.printStackTrace ();} o1C1F}gxU
catch(Exception e){e.printStackTrace ();} QND{3Q
} 5(RFkZn4[
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//读取保存的下载信息(文件指针位置) -xs@rV`
private void read_nPos() q5C(/@)^
{ 0Oy.&C T
try{ |Iei!jm
DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); x=>B 6o-f
int nCount = input.readInt(); ybLl[K(D=
nStartPos = new long[nCount]; 2F*spu
nEndPos = new long[nCount]; 278:5yC
for(int i=0;i<nStartPos.length;i++) kN (*.Q|VZ
{ o2M+=O@
nStartPos = input.readLong(); ~ 8L]!OQ9=
nEndPos = input.readLong(); T
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} k4:$LFw@
input.close(); K|JpkEw
} U-~cVk+LI
catch(IOException e){e.printStackTrace ();} 52Sq;X
catch(Exception e){e.printStackTrace ();} N$>.V7H&
} $yxwB/ O(
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private void processErrorCode(int nErrorCode) /+^7lQo\]
{ /}+VH_N1
System.err.println("Error Code : " + nErrorCode); \Ps}1)wT
} UrtA]pc3L
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//停止文件下载 sa 8JN.B
public void siteStop() +tO mKY
{ j9Qd
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bStop = true; `pr$l
for(int i=0;i<nStartPos.length;i++) 7#/->Y
fileSplitterFetch.splitterStop(); a#3+PB#
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} wW2b?b{*Z
} "&h{+DHS
//负责部分文件的抓取 co!o+jP
**FileSplitterFetch.java s<3cvF<
*/ Hq<Sg4nz
package NetFox; SURbH;[
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import java.io.*; Z;M}.'BE
import java.net.*; FuqMT`
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public class FileSplitterFetch extends Thread { QuFzj`(
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String sURL; //File URL q!UN<+k\h
long nStartPos; //File Snippet Start Position =NJ:%kvF
long nEndPos; //File Snippet End Position z!`aJE/
int nThreadID; //Thread's ID I*h%e,yIO
boolean bDownOver = false; //Downing is over $D;/b+a
boolean bStop = false; //Stop identical n^}M*#
FileAccessI fileAccessI = null; //File Access interface a'zXLlXgGd
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public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException
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{ KD TG9KC
this.sURL = sURL; * AsILK0
this.nStartPos = nStart; ~|y$^qy?U
this.nEndPos = nEnd; W`^euBr7R>
nThreadID = id; ad
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fileAccessI = new FileAccessI(sName,nStartPos);//定位 dU4 h
} 9gWR djK:
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public void run() tj ONN(K`
{ 3K)12x$.K
while(nStartPos < nEndPos && !bStop) (29h{=P'
{ qH1k
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try{ ,[gu7z^|
URL url = new URL(sURL); %IAZU c
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); k[_)5@2
httpConnection.setRequestProperty("User-Agent","NetFox"); vI84=n
String sProperty = "bytes="+nStartPos+"-"; W~" 'a9H/
httpConnection.setRequestProperty("RANGE",sProperty); gteG*p i
Utility.log(sProperty); 8]G
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InputStream input = httpConnection.getInputStream(); whH_<@!
//logResponseHead(httpConnection); JXT%@w>I
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byte[] b = new byte[1024]; /Kw}R5l
int nRead; Kp]\r-5UD>
while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) z2.9l?"rfQ
{ .8.4!6~@
nStartPos += fileAccessI.write(b,0,nRead); Ai*R%#
//if(nThreadID == 1) ^4G%*-
// Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); G`;YB
} Pn?,56SD=
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Utility.log("Thread " + nThreadID + " is over!"); +ConK>;
bDownOver = true; &XvSAw+D@
//nPos = fileAccessI.write (b,0,nRead); @%FLT6MY
} Q4;%[7LU
catch(Exception e){e.printStackTrace ();} T
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} OV~]-5gau
} tVUC@M>'
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//打印回应的头信息 \zx &5a
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public void logResponseHead(HttpURLConnection con) ~]w|ULNa3|
{ yuef84~
for(int i=1;;i++) E%.w6-
{ i(Xz3L#(
String header=con.getHeaderFieldKey(i); v0aV>-v
if(header!=null) H\>0jr`
//responseHeaders.put(header,httpConnection.getHeaderField(header)); rd
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Utility.log(header+" : "+con.getHeaderField(header)); yG v7^d
else 5YV3pFz$)
break; vk1E!T9X
} B@+&?%ub:
} /r8'stRzv
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public void splitterStop() $.5f-vQp
{ c4Leh"ry
bStop = true; ~[N"Q|D3Y
} B2kKEMdGg
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} ,P>xpfdK
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/* vvi[+$M
**FileAccess.java @$*LU:[
*//文件访问(定位,写) &s{" Vc9]
package NetFox; yIq.
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import java.io.*; %"jp':
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public class FileAccessI implements Serializable{ w7d<Ky_C
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//RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 !
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RandomAccessFile oSavedFile; id?B<OM
long nPos; W'xJh0o
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public FileAccessI() throws IOException pYBY"r
{ c e\|eN[
this("",0); llE_-M2gH
} P}re"<MD
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public FileAccessI(String sName,long nPos) throws IOException 0XzrzT"&
{ O;6am++M@
oSavedFile = new RandomAccessFile(sName,"rw"); qib4DT$v-6
this.nPos = nPos; _!ITCkBj
oSavedFile.seek(nPos); W1!Nq`
} j*fs [4
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public synchronized int write(byte[] b,int nStart,int nLen) Z(|'zAb^
{ 3 q^^Os
int n = -1; X+%5q =N
try{ s[n*fV']A
oSavedFile.write(b,nStart,nLen); K\VL[HP-
n = nLen; wfMtWXd;KB
} ]n
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catch(IOException e) L5RBe
{ 1
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e.printStackTrace (); uLq%Nu
} S2\|bs7;J,
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return n; *RllKP Y)
} KB5<)[bs
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} -L6V)aK&
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/* 0K:3?Ik
**SiteInfoBean.java "/g\?Nce
*/ DlF6tcoI
package NetFox; 8`Iz%rw&(J
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public class SiteInfoBean { ',l}$]y5
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private String sSiteURL; //Site's URL vwIP8z~<
private String sFilePath; //Saved File's Path +\s&v!
private String sFileName; //Saved File's Name cKe{ ]a
private int nSplitter; //Count of Splited Downloading File ZD#{h J-
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public SiteInfoBean() Z[%vO?,
{//nSplitter的缺省值为5 wqE+hKs,
//default value of nSplitter is 5 _!C M
this("","","",5); ;hZ^zL
} x*a^msY%
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