/* Ue)8g#
**SiteFileFetch.java A!j6JY.w
*/ @-Js)zcl q
package NetFox; Q[N6# C:(4
import java.io.*; &B5@\Hd;
import java.net.*; Jri"Toz0
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public class SiteFileFetch extends Thread { ?-IjaDC}
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SiteInfoBean siteInfoBean = null; //文件信息Bean Iz<}>J B
long[] nStartPos; //开始位置 #x;i R8^
long[] nEndPos; //结束位置 !mLYW
FileSplitterFetch[] fileSplitterFetch; //子线程对象 ]MXeWS(
long nFileLength; //文件长度 i''[u
boolean bFirst = true; //是否第一次取文件 amK.H"
boolean bStop = false; //停止标志 e8"?Qm7 J
File tmpFile; //文件下载的临时信息 ]Kb3'je
DataOutputStream output; //输出到文件的输出流 l|P(S(ikh
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//负责整个文件的抓取,控制内部线程(FileSplitterFetch类) A12 #v,
public SiteFileFetch(SiteInfoBean bean) throws IOException LMmW3W`
{ #{8n<sE
siteInfoBean = bean; `kdP)lI
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//tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); ,U#$Qb 12
tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); hDJ84$eVZ
if(tmpFile.exists ()) |?Z;tAF!
{ cR+9^DzA
bFirst = false; wv8WqYV
read_nPos(); P]4C/UDS-~
} ,nELWzz%{
else 420cJ{;A
{ 6R+m;'
nStartPos = new long[bean.getNSplitter()]; U`es
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nEndPos = new long[bean.getNSplitter()]; *hp3w
} 8N|y
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} (@H'7 ,
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public void run() 1}{bHj
{ DV(^h$1_
//获得文件长度 OA??fb,b
//分割文件 85<zl|ZD
//实例FileSplitterFetch 0\*6UH
//启动FileSplitterFetch线程 e?%Qv+)W
//等待子线程返回 4%TY`
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try{ OYEL` !Q
if(bFirst) at@B>Rb
{ FL+^r6DQ
nFileLength = getFileSize(); 'G!w0yF
if(nFileLength == -1) h5-<2B|
{ gu[3L
System.err.println("File Length is not known!"); %.kJ@@_e
} ?\C7.of
else if(nFileLength == -2) ]e?cKC\"e
{ oW*e6"<R7
System.err.println("File is not access!"); Cebl"3Q
} 6e6~82t8/
else ,[rh7_
{ 6@TGa%:G
for(int i=0;i<nStartPos.length;i++) OchIEF"N
{ G'/36M@
nStartPos = (long)(i*(nFileLength/nStartPos.length)); E"e <9
} iEG`+h'
for(int i=0;i<nEndPos.length-1;i++) _e<3 g9bj
{ ,4hQ#x
nEndPos = nStartPos[i+1]; UwuDs2
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} >z*2Og#1
nEndPos[nEndPos.length-1] = nFileLength; Zs
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} _q >>]{5
} B1]dub9
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//启动子线程 Ij_Y+Mnl4:
fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; \e%H5Wx
for(int i=0;i<nStartPos.length;i++) K~p\B
{ \K+LKa)
fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), i?uJ<BdU[
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), ^zPa^lo-
nStartPos,nEndPos,i); "oX@Z^
Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); n22k<@y
fileSplitterFetch.start(); E\2|
} 0GW(?7ZC
// fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), =k#SQ/@
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); Yb8o`j+t
// Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", 6$TE-l
nEndPos = " + nFileLength); _{ z.Tu
// fileSplitterFetch[nPos.length-1].start(); ZzA4iT=KO
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//等待子线程结束 Pa PQ|Pwz
//int count = 0; [U_Su,
//是否结束while循环 +Z0@z^6\
boolean breakWhile = false; ZOGH.`
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while(!bStop) ?[>+'6
{ 1df}gG
write_nPos(); V_JM@VN}Kk
Utility.sleep(500); 9V*h:[6a(
breakWhile = true;
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for(int i=0;i<nStartPos.length;i++) _
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{ ;C=C`$Q
if(!fileSplitterFetch.bDownOver) FBpf_=(_1
{ 1*aw~nY0
breakWhile = false; zmvF#o
break; }ie\-V
}
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} Td%[ -
if(breakWhile) MY11 5%
break; ?5d7J,"<h
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//count++; / $7E
//if(count>4) jRP.Je@t
// siteStop(); p`ai2`qC`
} J{"<Hgb
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System.err.println("文件下载结束!"); dLQV>oF
} HY[eo/nM1d
catch(Exception e){e.printStackTrace ();} Y@'ug N|[C
} $y~!ePKh
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//获得文件长度 gZQ,br*
public long getFileSize() |7XV!D!\g
{ tkrRdCq
int nFileLength = -1; .\1{>A
try{ 7XLz Ewa
URL url = new URL(siteInfoBean.getSSiteURL()); L=zt\L
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); v^_OX$=,
httpConnection.setRequestProperty("User-Agent","NetFox"); -z%|
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int responseCode=httpConnection.getResponseCode(); 4#H~g
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if(responseCode>=400) (~t/8!7N
{ @m14x}H
processErrorCode(responseCode); /8 /2#`3R
return -2; //-2 represent access is error ,1+AfI
} I6}ineps
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String sHeader; NbyVBl0=
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for(int i=1;;i++) ~x`BV+R
{ r@;n \
//DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); 1muB*
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//Utility.log(in.readLine()); 9Tbi_6[
sHeader=httpConnection.getHeaderFieldKey(i); ^Y"c1f2
if(sHeader!=null) ]<\FtH
{ C^>txui8
if(sHeader.equals("Content-Length")) Ik_u34U
{ m4FT^^3yE
nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); +[$d9
break; "W:#4@
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} EN^C'n
} cTW3\S=
else 5v:c@n
break;
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} MH;5gC@
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} R{zAs?j
catch(IOException e){e.printStackTrace ();} Hk)IV"[R
catch(Exception e){e.printStackTrace ();} md8r"
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Utility.log(nFileLength); {ir8n731p
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return nFileLength; ,A`.u \f(:
} y8/
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//保存下载信息(文件指针位置) HFV4S]U=
private void write_nPos() IBYRuaEB
{ M~ =Bln5
try{ $GI2rzh
output = new DataOutputStream(new FileOutputStream(tmpFile)); ROZOX$XM
output.writeInt(nStartPos.length); R7xKVS_MP
for(int i=0;i<nStartPos.length;i++) _&0_@
{ >^vyp!
// output.writeLong(nPos); 4{!7T
output.writeLong(fileSplitterFetch.nStartPos); L`v7|! X
output.writeLong(fileSplitterFetch.nEndPos); rdK=f<I]
} 0<3)K[m~H
output.close(); [v7)xV@c
} `Mj>t(
catch(IOException e){e.printStackTrace ();} ^{L/) Xy5
catch(Exception e){e.printStackTrace ();} 2%0J/]n\A"
} Eg&oAY.U
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//读取保存的下载信息(文件指针位置) y#%*aV}|B
private void read_nPos() ILsw'
{ {9(#X]'
try{ Kh{C$b
DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); v6r,2Va/
int nCount = input.readInt(); BEn,py7
nStartPos = new long[nCount]; |etA2"r&
nEndPos = new long[nCount]; k%UE^
for(int i=0;i<nStartPos.length;i++) 19.+"H
{ y7)s0g>%H
nStartPos = input.readLong(); v;=F$3
nEndPos = input.readLong(); l/|bU9o /u
} $LxfdSa
input.close(); fTn
} eBw6k09C+
catch(IOException e){e.printStackTrace ();} r*e<`Is
catch(Exception e){e.printStackTrace ();} lFHj]%Y
} I)@b#V=
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private void processErrorCode(int nErrorCode) Ns^[Hb[b'
{ '`.bmiM
System.err.println("Error Code : " + nErrorCode); (_2;}eg
} sn.Xvk%75
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//停止文件下载 Aw]W- fx
public void siteStop() aTJs.y-I~
{ #dcf Q
bStop = true; xp+Z%0D
for(int i=0;i<nStartPos.length;i++) Tyc`U&
fileSplitterFetch.splitterStop(); }jF67c->
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} z:
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} <$#;J>{WV
//负责部分文件的抓取 x>Hg.%/c[
**FileSplitterFetch.java n\l$R!zr
*/ 9eA2v{!S
package NetFox; 5~AK+6Za
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import java.io.*; @"B"*z-d
import java.net.*; t-, =sV
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public class FileSplitterFetch extends Thread { /hx|KC&:e
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String sURL; //File URL }ioHSkCD
long nStartPos; //File Snippet Start Position 6xFvu7L_c;
long nEndPos; //File Snippet End Position s<}d)L(
int nThreadID; //Thread's ID "JHdF&
boolean bDownOver = false; //Downing is over @wzzI 7}C
boolean bStop = false; //Stop identical m[k@\xS4e
FileAccessI fileAccessI = null; //File Access interface U{^~X_?
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public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException UK{6Rh ;
{ 1Wz -Z
this.sURL = sURL; Stw%OP@?
this.nStartPos = nStart; -!p +^wC
this.nEndPos = nEnd; :P!"'&gCL
nThreadID = id; Qxw?D4/Y
fileAccessI = new FileAccessI(sName,nStartPos);//定位 SCXH{8SS
} X4- _l$j
7Nw}
}
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public void run() A7|CG[wZ
{ W.B;Dy,Y
while(nStartPos < nEndPos && !bStop) v2vPfb
{ |oYqkP|
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try{ v,=[!=8!
URL url = new URL(sURL); 'dkKBLsx
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); V>8)1)dF
httpConnection.setRequestProperty("User-Agent","NetFox"); 3G4N0{i
String sProperty = "bytes="+nStartPos+"-"; ZQ&A'(tt4
httpConnection.setRequestProperty("RANGE",sProperty); s8/sH];
Utility.log(sProperty); ,KM-DCwcG
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InputStream input = httpConnection.getInputStream(); Ezvm5~<
//logResponseHead(httpConnection); ?PMF]ah
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byte[] b = new byte[1024]; $p(,Qz(.8
int nRead; efK3{
while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) H
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{ x_C#ALq9
nStartPos += fileAccessI.write(b,0,nRead); w<m)T
//if(nThreadID == 1) cz2guUu
// Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); qtqTLl@u
} 8 |@WuD
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Utility.log("Thread " + nThreadID + " is over!"); e)(m0m\
bDownOver = true; shjq4#9
//nPos = fileAccessI.write (b,0,nRead); zW,Nv>Ac5
} @,Re<%\
catch(Exception e){e.printStackTrace ();} R5y+bMZ
} ))pp{X2m
} TAkM-iyH]
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*=6,}rX"I
//打印回应的头信息 E(0(q#n
public void logResponseHead(HttpURLConnection con) Ap{2*o
{ __FhuP P
for(int i=1;;i++) A7/
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{ af:wg]g
String header=con.getHeaderFieldKey(i); [i8,rOa7
if(header!=null) C*S%aR
//responseHeaders.put(header,httpConnection.getHeaderField(header)); 5i 6*$#OM_
Utility.log(header+" : "+con.getHeaderField(header)); HjX!a29Wf
else _?5$ST@5
break; 'G.^g}N1
} l&