/* A"R(?rQi=
**SiteFileFetch.java 2 OqEyXh
*/ <'BsQHI
package NetFox; x5rLGt
import java.io.*; (T&(PCw|
import java.net.*; oiD{Z
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public class SiteFileFetch extends Thread { 'Asr,[]?
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SiteInfoBean siteInfoBean = null; //文件信息Bean o`
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long[] nStartPos; //开始位置 2U"2L^oKI
long[] nEndPos; //结束位置 CC3M7|eO3
FileSplitterFetch[] fileSplitterFetch; //子线程对象 p _3xW{I
long nFileLength; //文件长度 ~k}O"{
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boolean bFirst = true; //是否第一次取文件 7#7|+%W0
boolean bStop = false; //停止标志 wM3m'# xJ
File tmpFile; //文件下载的临时信息 N[v=;&
DataOutputStream output; //输出到文件的输出流 Kb1@ +
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//负责整个文件的抓取,控制内部线程(FileSplitterFetch类) 8U4In[4
public SiteFileFetch(SiteInfoBean bean) throws IOException L{&=SR.
{ y9=<q%Kc-
siteInfoBean = bean; (Jk[%_b>_
//tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); >$)~B4
tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); ^L8:..+:
if(tmpFile.exists ()) GaL UZviJ_
{ 6UL9+9[C
bFirst = false; \'iy(8i
read_nPos(); p{``a=
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else ?,%PemN
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nStartPos = new long[bean.getNSplitter()]; iM6(bmc.
nEndPos = new long[bean.getNSplitter()]; ^\Q%VTM
} NA`8 ^PZ
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} rR#wbDr5
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public void run() L.}sN.
{ ?C
//获得文件长度 dxtG3
//分割文件 .3cD.']%
//实例FileSplitterFetch v$g\]QS
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//启动FileSplitterFetch线程 "ctZ"*
//等待子线程返回 /q'-.-bo
try{ oEj$xm_}
if(bFirst) ,068IEs
{ |oe
nFileLength = getFileSize(); eX!yIqAR
if(nFileLength == -1) !T8sWMY
{ ZA@zs,o%
System.err.println("File Length is not known!"); 3*(><<ZC
} N S*Lv
else if(nFileLength == -2) S;%k?O7v
{ ?U1Nm~'UZ
System.err.println("File is not access!");
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} GJHJ?^%
else bT|-G2g7Z
{ I{.t-3hp
for(int i=0;i<nStartPos.length;i++) 2k&Voa
{ :C,}DyZy
nStartPos = (long)(i*(nFileLength/nStartPos.length)); ap"pQ[t;
} F}1._I`-
for(int i=0;i<nEndPos.length-1;i++) 1\)lD(J\C
{ 6BEDk!
nEndPos = nStartPos[i+1]; ,^eOwWV
} *Ue#Sade
nEndPos[nEndPos.length-1] = nFileLength; yw89*:A6
} :QXKG8^
} aMJ2bu
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//启动子线程 z92Xc
fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; 4-$kcwA
for(int i=0;i<nStartPos.length;i++) =e9<.{]S/
{ S?VKzVDB.S
fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), ej=}OH4
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), t\Qm2Q)>
nStartPos,nEndPos,i); :lmimAMt
Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); eW}-UeT
fileSplitterFetch.start(); :7(d6gEL
} %dhrXK5
// fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), wub7w#
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); N$.ls48a4-
// Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", |8GLS4.]t
nEndPos = " + nFileLength); ZU2D.Kf_:
// fileSplitterFetch[nPos.length-1].start(); ;4Xx5*E
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//等待子线程结束 'GO*6$/
//int count = 0; J{Ld)Q,^
//是否结束while循环 N.SV*G
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boolean breakWhile = false; z=8l@&hYLq
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while(!bStop) .G"T;w6d
{ `R lWhdE
write_nPos(); ,jD-fL/:
Utility.sleep(500); 0}T56aD=!
breakWhile = true; =CCddLO
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for(int i=0;i<nStartPos.length;i++)
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{ y
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if(!fileSplitterFetch.bDownOver) :r{W)(mm
{ 0TiDQ4}i[
breakWhile = false; u~mpZ"9$ 3
break; JxM32?Rm*w
} RtDTcaW/
} Wv,?xm
if(breakWhile) Vn_>c#B
break; [DTe
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//count++; zhyf}Ta'
//if(count>4) Q2Uk0:M
// siteStop(); :&E~~EUW
} wGHVq
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System.err.println("文件下载结束!"); UCo<ie\V
} +]hc!s8
catch(Exception e){e.printStackTrace ();} |47 2X&e
} p-7?S^!l
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//获得文件长度 (;HO3Z".q$
public long getFileSize() ]a:T]x6'
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int nFileLength = -1; .l,NmF9
try{ =~dsIG
URL url = new URL(siteInfoBean.getSSiteURL()); 7a.iT-*
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); 1d&Q
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httpConnection.setRequestProperty("User-Agent","NetFox"); R F;u1vEQ8
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int responseCode=httpConnection.getResponseCode(); |Y2n6gkH[
if(responseCode>=400) z34+1d
{ V9`jq$
processErrorCode(responseCode); ^[2siG
return -2; //-2 represent access is error +bWo{
} \PmM856=ms
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String sHeader; |Y(
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for(int i=1;;i++) 2k`Q+[?{q>
{ L|A1bxt
//DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); \@_?mL@=
//Utility.log(in.readLine()); 2nSz0 .
sHeader=httpConnection.getHeaderFieldKey(i); 5ai$W`6
if(sHeader!=null) !B#tJD
{ @ZcI]G%
if(sHeader.equals("Content-Length")) 8%b-.O:_$
{ Uz`OAb
nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); |j$$0N
break; YD5mJ[1t"2
} EDA6b]
} krXU*64
else R~#&xfMd.
break; 2y9$ k\<xV
} [?)He} _L
} 4&B|rf
catch(IOException e){e.printStackTrace ();} h<BTu7a`r
catch(Exception e){e.printStackTrace ();} cvV8;
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Utility.log(nFileLength); $oi8<8Y
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return nFileLength; Gn%k#
} ,k,+UisG
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//保存下载信息(文件指针位置) tLGNYW!K
private void write_nPos() 9]a!1
{ V:1_k"zQ
try{ 8oP"?ew#
output = new DataOutputStream(new FileOutputStream(tmpFile)); FF30VlJ
output.writeInt(nStartPos.length); RM!VAFH
for(int i=0;i<nStartPos.length;i++) <!~NG3KW[>
{ !7Z?VEZ
// output.writeLong(nPos); 8fQXif\z
output.writeLong(fileSplitterFetch.nStartPos); s&-dLkis{u
output.writeLong(fileSplitterFetch.nEndPos); G5$YXNV
} 3O?[Yhk`.
output.close(); zUJPINDb
} y~rtYI
catch(IOException e){e.printStackTrace ();} ztV%W6
catch(Exception e){e.printStackTrace ();} H`jvT]
} HhB'
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//读取保存的下载信息(文件指针位置) uBo~PiJ2"
private void read_nPos() ?qczMck_
{ `xFgYyiQd
try{ \l/<[ZZ
DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); "'U]4Z%q!
int nCount = input.readInt(); ;)!);q+
nStartPos = new long[nCount]; X"v)9p
nEndPos = new long[nCount]; jN sM&s,
for(int i=0;i<nStartPos.length;i++) $Q56~AP
{ 1h&_Q}DM
nStartPos = input.readLong(); ?xzDz
nEndPos = input.readLong(); 8"J6(KS
} 8|IlJiJ~v
input.close(); AF"XsEt.e
} 3>G"&T{
catch(IOException e){e.printStackTrace ();} HmRmZ3~
catch(Exception e){e.printStackTrace ();} 3qwSm<
} ag"Nf-o/Y
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private void processErrorCode(int nErrorCode) 78FK{Cr
{ MK, $#
System.err.println("Error Code : " + nErrorCode); Ve\P ,.
} LKu
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//停止文件下载 NpF)|Ppb{
public void siteStop() =42NQ{%@;
{ lxOUV? m^N
bStop = true; @z7$1pl}
for(int i=0;i<nStartPos.length;i++) fZrB!\Q
fileSplitterFetch.splitterStop(); 3("E5lI(g:
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} ,HfdiGs}j
} hquN+eIDH
//负责部分文件的抓取 &W-1W99auE
**FileSplitterFetch.java Y .\<P*iO
*/ #l-/!j
package NetFox; >d5L4&r
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import java.io.*; -bQi4
import java.net.*; D 13bQ&\B-
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public class FileSplitterFetch extends Thread { F}=O Mo:.
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String sURL; //File URL Z^ }4bR]
long nStartPos; //File Snippet Start Position a3[lZPQe
long nEndPos; //File Snippet End Position ]`_eaW?Ua
int nThreadID; //Thread's ID
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boolean bDownOver = false; //Downing is over xY1@Ja
boolean bStop = false; //Stop identical $5Tjo
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FileAccessI fileAccessI = null; //File Access interface HWi: CDgm
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public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException m15> ^i^W
{ Q@? {|7:
this.sURL = sURL; v!%VH?cA8
this.nStartPos = nStart; Ai.^~#%X
this.nEndPos = nEnd; [,|;rt\o>
nThreadID = id; @RFJe$%
fileAccessI = new FileAccessI(sName,nStartPos);//定位 5{O9<~,
}
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public void run() @sLB
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{ C9"yu&l
while(nStartPos < nEndPos && !bStop) :ej`]yK |
{ !:9s>0';N
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try{ H"J>wIuGX
URL url = new URL(sURL); -%6Y&_5VK
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); <;':'sW
httpConnection.setRequestProperty("User-Agent","NetFox"); LXx`Vk>ky
String sProperty = "bytes="+nStartPos+"-"; K:8.
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httpConnection.setRequestProperty("RANGE",sProperty); Wc!.{2
Utility.log(sProperty); `Uy'YfYF
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InputStream input = httpConnection.getInputStream(); D}A>`6W<