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**SiteFileFetch.java , >S7c
*/ ,&WwADZ-s
package NetFox; =urGs`\
import java.io.*; |?2fq&2
import java.net.*; \rzMgR$/rj
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public class SiteFileFetch extends Thread { ektU,Oo
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SiteInfoBean siteInfoBean = null; //文件信息Bean &k%>u[Bo
long[] nStartPos; //开始位置 /G'3!S
long[] nEndPos; //结束位置 3U+FXK#6
FileSplitterFetch[] fileSplitterFetch; //子线程对象 E KV[cq
long nFileLength; //文件长度 ">z3i`#C'
boolean bFirst = true; //是否第一次取文件 tMX$8W0
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boolean bStop = false; //停止标志 QR'# ]k;>%
File tmpFile; //文件下载的临时信息 pF8 #H~
DataOutputStream output; //输出到文件的输出流 xi(\=LbhY
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//负责整个文件的抓取,控制内部线程(FileSplitterFetch类) Lm2)3;ei
public SiteFileFetch(SiteInfoBean bean) throws IOException &tAYF_}
{ -R:_o1"
siteInfoBean = bean; cS9jGD92
//tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); 3}8o 9
tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); 0~^RHb.NA8
if(tmpFile.exists ()) mQ"uG?NE
{ pLtw|S'4
bFirst = false; ud$-A
read_nPos(); E6 -*2U)k+
} ufL<L;Z\;
else R~k`KuY@!
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nStartPos = new long[bean.getNSplitter()]; * /n8T]s
nEndPos = new long[bean.getNSplitter()]; ebQgk
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public void run() R/ZScOW[
{ 2]]v|Z2M4
//获得文件长度 PVBz~rG
//分割文件 ~E7IU<B
//实例FileSplitterFetch C'#)mo_@t
//启动FileSplitterFetch线程 Ct w <-'
//等待子线程返回 UgC65O2
try{ \}?X5X>
if(bFirst) w&aZ 97{
{
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nFileLength = getFileSize(); wc4BSJa,19
if(nFileLength == -1) ]2wxqglh)
{ ]$[sfPKA
System.err.println("File Length is not known!"); ujX;wGje
} $}gMJG
else if(nFileLength == -2) k_=yb^6[U
{ jfY7ich
System.err.println("File is not access!"); Ey|_e3Lf[
} Qw}1q!89
else !ka* rd
{ *(?Wzanh
for(int i=0;i<nStartPos.length;i++) 3uqhYT;
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nStartPos = (long)(i*(nFileLength/nStartPos.length)); Lz'VQO1U=
} MxIa,M<
for(int i=0;i<nEndPos.length-1;i++) QS&B"7;g
{ rTIu'
nEndPos = nStartPos[i+1]; 6(f'P_*
} Yg^ &4ZF
nEndPos[nEndPos.length-1] = nFileLength; LZRg%3.E
} xf]K
} ]$@D=g,r
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//启动子线程 `x`[hJ?i
fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; +O.-o/
for(int i=0;i<nStartPos.length;i++) 2M-[x"\1/
{ >5t%_/yeB
fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), 64zOEjra
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), 5*pzL0,Y
nStartPos,nEndPos,i); tg/UtE`V
Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); TJO$r6&
fileSplitterFetch.start(); %M@K(Qu
} U%nkPIFm
// fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), l}))vf=i
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); 27e!KG[&
// Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", YB5"i9T2
nEndPos = " + nFileLength); FvxM
// fileSplitterFetch[nPos.length-1].start(); _s=H|#l
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//等待子线程结束 ,twx4r^
//int count = 0; esqmj#G
//是否结束while循环 @Nek;xJ
boolean breakWhile = false; /*mF:40M;
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while(!bStop) aixX/se
{ JL1ajlm~
write_nPos(); WEimJrAn
Utility.sleep(500); ::|~tLFu
breakWhile = true; 8b2 =n
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for(int i=0;i<nStartPos.length;i++) "jFf}"
{ )D,KG_7l
if(!fileSplitterFetch.bDownOver) t~) P1Lof\
{ A9$x8x*Lt
breakWhile = false; o$rjGa l
break; k {*QU(
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} &]nx^C8V;
if(breakWhile) h Jb2y`,q
break; z%82Vt!a5
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//count++; }e?H(nZS7h
//if(count>4) /<J(\;Jr6
// siteStop(); .-KI,IU
} $5R2QNg n
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System.err.println("文件下载结束!"); m9 h '!X<
} >
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catch(Exception e){e.printStackTrace ();} 35<A:jKS
} r
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//获得文件长度 k?+ 7%A]
public long getFileSize() l|P"^;*zq
{ B*(]T|ff<
int nFileLength = -1; p)y5[HX
try{ j/O~8o&
URL url = new URL(siteInfoBean.getSSiteURL()); [FO4x`
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); c|&3e84U
httpConnection.setRequestProperty("User-Agent","NetFox"); 7n8nJTU{4j
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int responseCode=httpConnection.getResponseCode(); Re$h6sh
if(responseCode>=400) G;Li!H
{ (Rw<1q`,
processErrorCode(responseCode); KGz Nj%
return -2; //-2 represent access is error 1/.BP
} A~?M`L>B
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String sHeader; o*cu-j3
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for(int i=1;;i++) <xI<^r'C9e
{ X?5{2ulrI
//DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); 8 #_pkVQw:
//Utility.log(in.readLine()); O=B=0
sHeader=httpConnection.getHeaderFieldKey(i); De?VZ2o9"
if(sHeader!=null) fF@w:;u
{ ;qshd'?*
if(sHeader.equals("Content-Length")) Bn}woyJdx
{ \T7Mt|f:5
nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); a>wCBkD
break; Y6` xb`
} rq+_[!
} xe@1H\7:
else y>I2}P
break; l5[5Y6c>
} 2Ez<Iw
} w'S,{GW
catch(IOException e){e.printStackTrace ();} >>U>'}@Q
catch(Exception e){e.printStackTrace ();} LOh2eZ"n
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Utility.log(nFileLength); 50,'z?-_
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return nFileLength; B
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} Z(mUU]
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//保存下载信息(文件指针位置) 1[FN: hm
private void write_nPos() bZqTT~'T
{ J=g)rd[`
try{ =RoG?gd{R
output = new DataOutputStream(new FileOutputStream(tmpFile)); eV9U+]C`
output.writeInt(nStartPos.length); pv_o4qEN
for(int i=0;i<nStartPos.length;i++) -`O{iHfM|P
{ f1 ;
// output.writeLong(nPos); VD;*UkapZx
output.writeLong(fileSplitterFetch.nStartPos); m'o dVZ7
output.writeLong(fileSplitterFetch.nEndPos); .wfydu)3
} $O"ss>8Se
output.close(); YF%gs{
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catch(IOException e){e.printStackTrace ();} dWAt#xII
catch(Exception e){e.printStackTrace ();} kf,
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} Iy<>-e"|
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//读取保存的下载信息(文件指针位置) LEb$Fd
private void read_nPos() s,z~qL6&
{ 19!?oeOU
try{ PX:#+bq1
DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); ;Qi:j^+P)
int nCount = input.readInt(); =pH2V^<<#
nStartPos = new long[nCount]; DIC*{aBf
nEndPos = new long[nCount]; a<cwrDZ
for(int i=0;i<nStartPos.length;i++) amBg<P`'_
{ JcAsrtrG]
nStartPos = input.readLong(); \J'}CX*aQ
nEndPos = input.readLong(); kDmm
} R9XU 7_3B
input.close(); t{md&k4
} YQMWhC,8hy
catch(IOException e){e.printStackTrace ();} 0vY_
catch(Exception e){e.printStackTrace ();} (3Db}Hnn
} I2[U #4n
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private void processErrorCode(int nErrorCode) MIMC(<
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System.err.println("Error Code : " + nErrorCode); `#""JTA"
} [doEArwn
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//停止文件下载 wJp<ZL
public void siteStop() hnj\|6L
{ u]p21)m$x
bStop = true; waMF~#PJlt
for(int i=0;i<nStartPos.length;i++) WAu>p3
fileSplitterFetch.splitterStop(); NxP(&M(
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} 'zyw-1
} }(EH5jZ'
//负责部分文件的抓取 !fOPYgAGKn
**FileSplitterFetch.java epy2}TI
*/ zsL@0]e&
package NetFox; 9+ 'i(q
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import java.io.*; 6VW*8~~Xy
import java.net.*; uibmQ|AQ
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public class FileSplitterFetch extends Thread { I)rnF
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String sURL; //File URL ImXYI7PL
long nStartPos; //File Snippet Start Position \&"C
long nEndPos; //File Snippet End Position \xYVnjG,
int nThreadID; //Thread's ID 4Aj~mA
boolean bDownOver = false; //Downing is over "@V yc6L
boolean bStop = false; //Stop identical YxF@1_g
FileAccessI fileAccessI = null; //File Access interface sd%j&Su#4
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public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException 0 R6:3fV6R
{ 8Qv s\TY
this.sURL = sURL; `v*HH}aDO
this.nStartPos = nStart; 5`h$^l/
this.nEndPos = nEnd; lM-9 J?j
nThreadID = id; J%"BCbxW~B
fileAccessI = new FileAccessI(sName,nStartPos);//定位 0|&@)`
} @MSmg3&
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public void run() c^}y9% 4c
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while(nStartPos < nEndPos && !bStop) '*J+mZt N
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try{ r:*G{m-
URL url = new URL(sURL); ON2o^-%=
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); j=r1JV
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httpConnection.setRequestProperty("User-Agent","NetFox"); IeYYG^V<A
String sProperty = "bytes="+nStartPos+"-"; g~hMOI?KK^
httpConnection.setRequestProperty("RANGE",sProperty); omE- c
Utility.log(sProperty); I&-r^6Yx
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InputStream input = httpConnection.getInputStream(); vJWBr:`L
//logResponseHead(httpConnection); JR!-1tnc
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