/* +*qTZIXj
**SiteFileFetch.java nH?#_ 5F1
*/ Ql}#mC.>/
package NetFox; XGnC8Be{4
import java.io.*; -q-BP}r3
import java.net.*; "5sUE!)f
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public class SiteFileFetch extends Thread { &oVZ2.O#(
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SiteInfoBean siteInfoBean = null; //文件信息Bean ^!(tc=sr
long[] nStartPos; //开始位置 8Sf}z@~]
long[] nEndPos; //结束位置 M~saYJio
FileSplitterFetch[] fileSplitterFetch; //子线程对象 ))6iVgSE$
long nFileLength; //文件长度 RBeQT=B8~
boolean bFirst = true; //是否第一次取文件 |' kC9H[>
boolean bStop = false; //停止标志 Ao9=TC'v$'
File tmpFile; //文件下载的临时信息 bwjLMWEVq
DataOutputStream output; //输出到文件的输出流 b]Lp_t
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//负责整个文件的抓取,控制内部线程(FileSplitterFetch类) ^S(["6OJ(
public SiteFileFetch(SiteInfoBean bean) throws IOException V\%s)kq
{ "?
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siteInfoBean = bean; M1Th~W9l
//tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); U4y ?z
tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info");
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if(tmpFile.exists ()) u9}LvQh_6,
{ c=:A/z{
bFirst = false; S)@) @3
read_nPos(); LaIH3!M3
} 2\xEMec
else ?trqe/
{ `hl1R3nBM
nStartPos = new long[bean.getNSplitter()]; Oufdi3h
nEndPos = new long[bean.getNSplitter()]; d
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} r}XsJ$
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} `SESj)W(y
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public void run() JsQmn<Yt
{ 'y:+w{I2o
//获得文件长度 JiHk`e`
//分割文件 bQ_N^[oxQ
//实例FileSplitterFetch !pe!Z-,
//启动FileSplitterFetch线程 zlN<yZB^
//等待子线程返回 m"8Gh`Fo
try{ VTJ,;p_UH
if(bFirst) <<ifd?
{ `n`aA)|<
nFileLength = getFileSize(); <-a6'g2y
if(nFileLength == -1) ^U@Erc#d
{ w}QU;rl8q
System.err.println("File Length is not known!"); wfF0+T+IA
} T,Zfz9{n
else if(nFileLength == -2) E6y ?DXWH
{ &o*f*(C2
System.err.println("File is not access!"); 095ZZ20
} IgU65p
else ){{]3r
{ Ax;i;<md
for(int i=0;i<nStartPos.length;i++) qHQ#^jH
{ =WP`i29j9}
nStartPos = (long)(i*(nFileLength/nStartPos.length)); VWR6/,N^_
} ZAcW@xfb
for(int i=0;i<nEndPos.length-1;i++) "~zQN(sR"P
{ (# ;<iu}
nEndPos = nStartPos[i+1]; V$XCe
} 8g CQ0w<
nEndPos[nEndPos.length-1] = nFileLength; [>tyx{T Ye
} XT
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} \%D/]"@r
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//启动子线程 g` QbJ61a
fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; H6PS7g"
for(int i=0;i<nStartPos.length;i++) Pq:GvM`
{ qhiO( !jK
fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), m!-,K8
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), GGR hM1II
nStartPos,nEndPos,i); g [~"c}
Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); gM<*(=x'
fileSplitterFetch.start(); T] tG,W1>i
} $zvqjT:>
// fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), S4?N_"m9
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); !@x'?+
// Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", 6mi:%)"
nEndPos = " + nFileLength); BiUOjQC#
// fileSplitterFetch[nPos.length-1].start(); aI6fPQe
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//等待子线程结束 MH>CCT
//int count = 0; *MEDV1l_T
//是否结束while循环 )`ZTu -|
boolean breakWhile = false; .WR+)^&zz
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while(!bStop) 8W|qm;J98
{ t(|\3$z
write_nPos(); BQol>VRu
Utility.sleep(500); m};Qng]
breakWhile = true; P%6-W5<
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for(int i=0;i<nStartPos.length;i++) x*A_1_A
{ /OpVr15
if(!fileSplitterFetch.bDownOver) S;vE%
{ {/x["2a1
breakWhile = false; fBptjt_
break; qd9CKd
} }?pY~f
} (bIg6_U7\
if(breakWhile) 'Lw4jq
break; (1r.AG`g
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//count++; 2[W1EQI
//if(count>4) 38wt=0br
// siteStop(); qFo'"z`84
} cC_L4
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System.err.println("文件下载结束!"); (LW4z8e#
} b5hJaXJN
catch(Exception e){e.printStackTrace ();} %E95R8SL
} &95iGL28Q
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}*{@-v|_R
//获得文件长度 V[R33NYG
public long getFileSize() '1lr "}"Q+
{ &j\<UPn
int nFileLength = -1; h)EHaaf
try{ |fMjg'%{}
URL url = new URL(siteInfoBean.getSSiteURL()); !%' 1x2?
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); Th&*
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httpConnection.setRequestProperty("User-Agent","NetFox"); lF]cUp#<
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int responseCode=httpConnection.getResponseCode(); "T/
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if(responseCode>=400) 4WV'\R+m
{ D"WqJcDt
processErrorCode(responseCode); _~aFzM
return -2; //-2 represent access is error mC
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} ;\@co5.=
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String sHeader; rO]7g
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for(int i=1;;i++) EP.nVvuL
{ \ltA&}!
//DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); =H T:p:S
//Utility.log(in.readLine()); OI3UC=G
sHeader=httpConnection.getHeaderFieldKey(i); adG=L9
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if(sHeader!=null) bT|NZ!V
{
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if(sHeader.equals("Content-Length")) ].f28bY
{ XeD9RMT
nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); Mp=2}d%P
break; O j<.3U[C
} wYtL1D(
} <qD/ #$
else VeixwGZ.
break; 0MK|spc
} x0^O?UR
} =`f6@4H
catch(IOException e){e.printStackTrace ();} s;'XX}Y
catch(Exception e){e.printStackTrace ();} ^h+,Kn0@
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Utility.log(nFileLength); BJI}gm2y
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return nFileLength; e0O2>w
} M_tY: v
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//保存下载信息(文件指针位置) e)dPv:oK3
private void write_nPos() 6QsH?!bu
{ 1JIL6w_
try{ H`/QhE
output = new DataOutputStream(new FileOutputStream(tmpFile)); 0HUSN_3F
output.writeInt(nStartPos.length); 4`F(RweGx
for(int i=0;i<nStartPos.length;i++) fY@Y$S`Fh
{ ]M
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// output.writeLong(nPos); BKDs3?&
output.writeLong(fileSplitterFetch.nStartPos); *"V5j#F_
output.writeLong(fileSplitterFetch.nEndPos); {6%vmMbJ
} t0_o.S
output.close(); %4#,y(dO
} >jEn>H?
catch(IOException e){e.printStackTrace ();} (4_7ICFI
catch(Exception e){e.printStackTrace ();} zx"'WM*
}
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//读取保存的下载信息(文件指针位置) =[%ge{ ,t
private void read_nPos() sBP.P7u
{ s(56aE
try{ pEk^;
DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); ~ZeF5
int nCount = input.readInt(); SH>L3@Za
nStartPos = new long[nCount]; E"!I[
nEndPos = new long[nCount]; K*;e>{p
for(int i=0;i<nStartPos.length;i++) `>CHE'_
{ fE"Q:K6r2
nStartPos = input.readLong(); T^LpoN/T
nEndPos = input.readLong(); ~l$u~:4Ob
} ,KvF:xqA
input.close(); cIqk=_]
} g_lj/u]P
catch(IOException e){e.printStackTrace ();} hwF9LD~^
catch(Exception e){e.printStackTrace ();} 6<sd6SM
} 9(?9yFbj5
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private void processErrorCode(int nErrorCode) v"M5';ZS>
{ D<}z7W-
System.err.println("Error Code : " + nErrorCode); );T0n
} _ndc^OG
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//停止文件下载 i#/,Q1yEn
public void siteStop() gycjIy@t
{ Rh!B4oB4
bStop = true; dQUZ11
for(int i=0;i<nStartPos.length;i++) ^mWOQ*zi;
fileSplitterFetch.splitterStop(); v ~|~&Dwq
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} !u@XEN>/
} @tQu3Rq@
//负责部分文件的抓取 N$1ZA)M
**FileSplitterFetch.java [ kI|Thx
*/ u{#}Lo>B #
package NetFox; y/}[S@4uB
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import java.io.*; yW::`
import java.net.*; 32yGIRV
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public class FileSplitterFetch extends Thread { uTsxSkHb/
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String sURL; //File URL +NML>g#F~z
long nStartPos; //File Snippet Start Position gc~nT/lfK
long nEndPos; //File Snippet End Position bf1Tky=/
int nThreadID; //Thread's ID X.~z:W+
boolean bDownOver = false; //Downing is over Ziclw)
boolean bStop = false; //Stop identical F@m]Imn5Dx
FileAccessI fileAccessI = null; //File Access interface ?HD(EGdx
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public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException L`sg60z
{ Hzm<KQ
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this.sURL = sURL; E?\&OeAkO
this.nStartPos = nStart; @9,=|kxK
this.nEndPos = nEnd; QaAA@l
nThreadID = id; 'gBns
fileAccessI = new FileAccessI(sName,nStartPos);//定位 ^\<nOzU?
} --S1p0
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public void run() k2bjBAT
{ U}#3LFr.?
while(nStartPos < nEndPos && !bStop) _H{6{!=y
{ 0.pZlv
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try{ MP/@Mf\<E
URL url = new URL(sURL); &Hz{
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); %@L[=\
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httpConnection.setRequestProperty("User-Agent","NetFox"); o7gYj\
String sProperty = "bytes="+nStartPos+"-"; {oXU)9vj
httpConnection.setRequestProperty("RANGE",sProperty); 9Wu c1#
Utility.log(sProperty); BE0Ov{'
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InputStream input = httpConnection.getInputStream(); EF>vu+YK
//logResponseHead(httpConnection); wDQ@$T^vh
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byte[] b = new byte[1024]; [c^!;YBp)
int nRead; G_m $?0\
while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) kC,=E9)O
{ v9,<2
nStartPos += fileAccessI.write(b,0,nRead); us5<18M5
//if(nThreadID == 1) }}Zwdpo
// Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); -/V,<@@T
} kk`K)PESi
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Utility.log("Thread " + nThreadID + " is over!"); cp:U@Nh(
bDownOver = true;
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//nPos = fileAccessI.write (b,0,nRead); %nS(>X<B
} Z5j\ M
catch(Exception e){e.printStackTrace ();} =:M/hM)#
} ybC0Ee@
} +P &S0/
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//打印回应的头信息 D_N0j{E
public void logResponseHead(HttpURLConnection con) 8aqH;|fG}
{ .9u0WP95
for(int i=1;;i++) :@RX}rKG
{ \y(ZeNs
String header=con.getHeaderFieldKey(i); %A3ci[$g
if(header!=null) B:>>D/O
//responseHeaders.put(header,httpConnection.getHeaderField(header)); qyKI.X3n*
Utility.log(header+" : "+con.getHeaderField(header)); <Fi*wV
else Gw$Y`]ipy
break; Q\nIU7:bZ
} /HE{8b7n3F
} SIZ&0V
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public void splitterStop() R0#'t+7^
{ o(gV;>I
bStop = true; Rb_%vOM
} p[K!.vOt+
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} UL.YDU)
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/* nh]HEG0CZJ
**FileAccess.java `J$7X
*//文件访问(定位,写) +,_%9v?3
package NetFox; <c&Nm_)
import java.io.*; Hva/C{Y
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public class FileAccessI implements Serializable{ ]P96-x
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//RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 xC9?Wt'
RandomAccessFile oSavedFile; U/A
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long nPos; r3+
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public FileAccessI() throws IOException X.V4YmZ-;
{ UZ1Au;(|
this("",0); RgVnx] IF
} h!7Lvh`o
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public FileAccessI(String sName,long nPos) throws IOException Fd#Zu.Np
{ ? ph>:M
oSavedFile = new RandomAccessFile(sName,"rw"); <cFj-Ys(T
this.nPos = nPos; 8H,k0~D
oSavedFile.seek(nPos); ]QQeUxi
} |_hIl(6F5N
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public synchronized int write(byte[] b,int nStart,int nLen) J(SGa Hm@
{ Z^J7r&\V
int n = -1; BDCyeC,Q3
try{ z 'V$)U$f
oSavedFile.write(b,nStart,nLen); rN,T}M=2
n = nLen; n7|,b-
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} O"#/>hmv-
catch(IOException e) Ed+jSO0
{ SX&Q5:
e.printStackTrace (); T!i$nI&
} Hzz v 6k
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return n; L4ZB0PmN'
} S%e)br}
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