/* yz^Rm2$f9
**SiteFileFetch.java 1C<@QrT
*/ ~>>^7oq
package NetFox; )&.Zxo;q=
import java.io.*; ;a~
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import java.net.*; #-bz$w#*
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public class SiteFileFetch extends Thread { G9r~O#=gy
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SiteInfoBean siteInfoBean = null; //文件信息Bean k[]2S8K2
long[] nStartPos; //开始位置 A $W~R
long[] nEndPos; //结束位置 zEs:OOM
FileSplitterFetch[] fileSplitterFetch; //子线程对象 fnJt8Y4
long nFileLength; //文件长度 P?j ;&@$^e
boolean bFirst = true; //是否第一次取文件 YaAOP'p
boolean bStop = false; //停止标志 )EIT>u=
File tmpFile; //文件下载的临时信息 irKM?#h
DataOutputStream output; //输出到文件的输出流 9qX)FB@'i;
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//负责整个文件的抓取,控制内部线程(FileSplitterFetch类) $'93:9tg
public SiteFileFetch(SiteInfoBean bean) throws IOException F0/!+ho
{ 3?bTs =
siteInfoBean = bean; N<T@GQwkS
//tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); `clp#l.ii
tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); M. fA5rJ^
if(tmpFile.exists ()) IQQ QB
{ $9?<mP2-*
bFirst = false; hf< [$B
read_nPos(); ugS
} @k||gQqIB
else Z90]I<a~
{ Nd%j0lj
nStartPos = new long[bean.getNSplitter()]; j},3@TFh
nEndPos = new long[bean.getNSplitter()]; t-)d*|2n}o
} ygYy [IZ
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} ZFRKzPc
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public void run() 5N:IH@
{
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//获得文件长度 7,5Bur
//分割文件 CRPE:7,D
//实例FileSplitterFetch 9i+`,r
//启动FileSplitterFetch线程 FPukV^
//等待子线程返回 F $1f8U8
try{ EjP9/VG@=
if(bFirst) l9f%?<2D
{ |H>;a@2d
nFileLength = getFileSize(); 5Tq*]ZE
if(nFileLength == -1) {_~vf
{ 0?O$->t
System.err.println("File Length is not known!"); *g[MGyF"
} CO`?M,x>
else if(nFileLength == -2) [Z;ei1l
{ O9_SVXWVw
System.err.println("File is not access!"); ~9n30j%]s
} L"}tJM.d
else H7(D8.y )
{ zV8{|-2]No
for(int i=0;i<nStartPos.length;i++) z"f+;1
{ vF1Fcp.@
nStartPos = (long)(i*(nFileLength/nStartPos.length)); -9(pOwN
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} kbZpi`w
for(int i=0;i<nEndPos.length-1;i++) .Ky)Co
{ I %|;M%B
nEndPos = nStartPos[i+1]; in `|.#
} bL/DjsZ@
nEndPos[nEndPos.length-1] = nFileLength; &1ZUMc
} oqbhb1D1<
} @S1Z"%S
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//启动子线程 HYl~)O>
fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; 4`Lr^q}M+
for(int i=0;i<nStartPos.length;i++) _fS4a134R
{ 2])e}&i
fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), Sm;@MI<@/
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), `N8t2yF
nStartPos,nEndPos,i); }VeE4-p B
Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); c&C*'c-r
fileSplitterFetch.start(); z0@BBXQ`
} ox5WboL
// fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), V&7NN=
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); Q hdG(`PY~
// Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", izs=5
nEndPos = " + nFileLength); ojc.ykP$
// fileSplitterFetch[nPos.length-1].start(); YP>J'{?b*"
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//等待子线程结束 Zxh<pd25Y
//int count = 0; p}8?#5`/w
//是否结束while循环 3Uej]}c
boolean breakWhile = false; _{$<s[S
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while(!bStop) X.ecA`0
{ [,(+r7aB
write_nPos(); n;wViw
Utility.sleep(500); Q" r y@
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breakWhile = true; wHh6y? g\
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for(int i=0;i<nStartPos.length;i++) #4<=Ira5
{ 6-FM<@H{
if(!fileSplitterFetch.bDownOver) RK=Pm7L:`y
{ S0M i
breakWhile = false; 0#4A0[vV
break; z_Hkw3?
} &OA6Zw/A
} 3)I]bui
if(breakWhile) q1v7(`O
break; 29cx(
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//count++; GL~
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//if(count>4) -fp/3-
// siteStop(); 5)A[NTNJx
} .5);W;`X
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System.err.println("文件下载结束!"); (4?^X
} e=3C*+lq\
catch(Exception e){e.printStackTrace ();} ?d+ri
} X ]W)D
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//获得文件长度 p=3t!3
public long getFileSize() HJBGxyw
{ {Qc,Nl
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int nFileLength = -1; xojt s;n
try{ Uz~B`
URL url = new URL(siteInfoBean.getSSiteURL()); Kwi+}B!
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); UA4c4~$S
httpConnection.setRequestProperty("User-Agent","NetFox"); @ qi|}($
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int responseCode=httpConnection.getResponseCode(); 8!YQ9T [
if(responseCode>=400) 'n=bQ"bQu
{ yEk|(6+^
processErrorCode(responseCode); =CO) Q2
return -2; //-2 represent access is error vG7Mk8mIr
} l(Dr@LB~
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String sHeader; )Ly~\*
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for(int i=1;;i++) d2d8,Vg
{ &n6L;y-
//DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); dm]g:KWg
//Utility.log(in.readLine()); RN|Bk
sHeader=httpConnection.getHeaderFieldKey(i); u})*6 l.
if(sHeader!=null) 7r^Cs#b+I
{ (>E/C^Tc%
if(sHeader.equals("Content-Length")) #d*0
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{ ({@"{
nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); 5D2mZ/
break; q*5L",
} DBG0)=SHy
} LT>_Y`5>
else hW'b'x<
break; ''D7Bat@
} ."gq[0_YS
} 4f~sRubK
catch(IOException e){e.printStackTrace ();} DaJ,(DJY
catch(Exception e){e.printStackTrace ();} wEwRW
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Utility.log(nFileLength); cvo+{u$s
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return nFileLength; ~5h4 Gy)
} $MGKGWx@E
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//保存下载信息(文件指针位置) |vm-(HY!
private void write_nPos() SvQ|SKE':
{ SjpCf8Z(
try{ *aC[Tv[-P
output = new DataOutputStream(new FileOutputStream(tmpFile)); [s`B0V`04
output.writeInt(nStartPos.length); [[]yQ
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for(int i=0;i<nStartPos.length;i++) -G@uB_C s
{ he/rt#
// output.writeLong(nPos); G[]%1
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output.writeLong(fileSplitterFetch.nStartPos); r]&sXKDc
output.writeLong(fileSplitterFetch.nEndPos); V= p"1!(
} -s!J3DB
output.close(); TB?'<hD:
} 0Ze&GK'Hf
catch(IOException e){e.printStackTrace ();} .>}I/+n
catch(Exception e){e.printStackTrace ();} R9^vAS4t[O
} H\n6t-l
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//读取保存的下载信息(文件指针位置) ;dMr2y`6
private void read_nPos() jA;b2A]G
{ W1<*9O
try{ ^|6#Vx
DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); YpXd5;'
int nCount = input.readInt(); `GBJa k
nStartPos = new long[nCount]; ,jeHL@>w[
nEndPos = new long[nCount]; 74:( -vS
for(int i=0;i<nStartPos.length;i++) Te~jYkCd
{ <}A6 )=T
nStartPos = input.readLong(); N\&VJc
nEndPos = input.readLong(); 2;*G!rE&*`
} 0tL5t7/Gr
input.close(); ks("(
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} wJJ|]^0.
catch(IOException e){e.printStackTrace ();} =liyd74%`
catch(Exception e){e.printStackTrace ();} /m;Bwu
} A^+k A)8
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private void processErrorCode(int nErrorCode) u/wX7s
{ W`JI/
System.err.println("Error Code : " + nErrorCode); 1 oKY7i$
} &&52ji<3
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//停止文件下载 !`7evV:
public void siteStop() x1`(Z|RJ
{ o6|-
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bStop = true; lH`c&LL-=!
for(int i=0;i<nStartPos.length;i++) l{.PyU5)
fileSplitterFetch.splitterStop(); *0@Z+'M?
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} frm[<-~ w0
} LgX2KU"
//负责部分文件的抓取 8YE4ln
**FileSplitterFetch.java YU0pWM
*/ ^`dMjeF
package NetFox; 4clCZ@\K^
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import java.io.*; !Sy9v
import java.net.*; ".Q]FE@>
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public class FileSplitterFetch extends Thread { \24'iYtqW
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String sURL; //File URL .Jg<H %%f
long nStartPos; //File Snippet Start Position n#WOIweInf
long nEndPos; //File Snippet End Position {wt9/IlG1
int nThreadID; //Thread's ID N4-Y0BO
boolean bDownOver = false; //Downing is over .Wp(@l'Hd
boolean bStop = false; //Stop identical dc~vQDNw[X
FileAccessI fileAccessI = null; //File Access interface K%BFR,)g
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public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException -{JReplc
{ K iXD1Zpz
this.sURL = sURL; _C1u}1hW#
this.nStartPos = nStart; ]Hi1^Y<
this.nEndPos = nEnd; qFDy)4H)
nThreadID = id; #')]~Xa
fileAccessI = new FileAccessI(sName,nStartPos);//定位 U
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} tRc3<>
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public void run() ZJGIib
{ S\sy^Kt~4:
while(nStartPos < nEndPos && !bStop) -gC%*S5&
{ ho~WD'i
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try{ x~8R.Sg
URL url = new URL(sURL); <?8cVLW}O
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); d/3&3>/
httpConnection.setRequestProperty("User-Agent","NetFox"); wod{C !
String sProperty = "bytes="+nStartPos+"-"; ~
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httpConnection.setRequestProperty("RANGE",sProperty); r
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Utility.log(sProperty); v[x 5@$
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InputStream input = httpConnection.getInputStream(); l,A\]QDvl
//logResponseHead(httpConnection); hhylsm
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byte[] b = new byte[1024]; F/A)2 H_
int nRead; CnY dj~
while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) 4U)%JK.ta
{ n
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nStartPos += fileAccessI.write(b,0,nRead); T?u*ey~Tv
//if(nThreadID == 1) /Z#AHfKF
// Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); {BA Z`I
} Of-gG~
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Utility.log("Thread " + nThreadID + " is over!"); 98<^!mwF
bDownOver = true; WwSyw?T
//nPos = fileAccessI.write (b,0,nRead); @.`HvS
} hdM?Uoo(4a
catch(Exception e){e.printStackTrace ();} *x2u
} Pj8Vl)8~NV
} }gX4dv
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//打印回应的头信息 Mwj7*pxUh
public void logResponseHead(HttpURLConnection con) {Y]3t9!\
{ N;m62N
for(int i=1;;i++) p<@+0Uw2
{ GBd
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String header=con.getHeaderFieldKey(i); &w%%^ +n
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if(header!=null) Pm24;'
//responseHeaders.put(header,httpConnection.getHeaderField(header)); J(XK%e[8
Utility.log(header+" : "+con.getHeaderField(header)); (@\0P H0
else zCwb>v
break; F>@z&a}(
} d+eb![fi
} 4HXNu, T'
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public void splitterStop() g@>y`AFnr
{ %-!:$ 1;
bStop = true; /h&>tYVio
}
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} tjm@+xs
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/* 5M3)7
**FileAccess.java zfml^N
*//文件访问(定位,写) gp{P _
package NetFox; etP`q:6^c
import java.io.*; FFF7f 5F
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public class FileAccessI implements Serializable{ P(zquKm
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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 iF+50d
RandomAccessFile oSavedFile; 1
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long nPos; 0L7^Vr)
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public FileAccessI() throws IOException YjG:ECj}
{ T=cb:PD{%
this("",0); nQ'AB~ Do
} Dw2$#d
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public FileAccessI(String sName,long nPos) throws IOException iJu$&