/* Id<O/C
**SiteFileFetch.java 9H%dK^C
*/ fpA%:V
package NetFox; .*~t2 :
import java.io.*;
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import java.net.*; \<kQ::o1y
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public class SiteFileFetch extends Thread { 4SNDKFw
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SiteInfoBean siteInfoBean = null; //文件信息Bean T/nG\WZbZn
long[] nStartPos; //开始位置 >MLPmER
long[] nEndPos; //结束位置 D6vhW:t8?
FileSplitterFetch[] fileSplitterFetch; //子线程对象 w^=uq3X?
long nFileLength; //文件长度 2SRmh!hr
boolean bFirst = true; //是否第一次取文件 CYn56eRK
boolean bStop = false; //停止标志 "x4}FQ
File tmpFile; //文件下载的临时信息 Fu\!'\6
DataOutputStream output; //输出到文件的输出流 OeYZLC(
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//负责整个文件的抓取,控制内部线程(FileSplitterFetch类) ' &<saqA
public SiteFileFetch(SiteInfoBean bean) throws IOException >mUSRf4
{ lDVw2J'p
siteInfoBean = bean; &j!q9F
//tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); Gg# 1k TK
tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); J_}Rsp ED
if(tmpFile.exists ()) a2. @Zyz
{ m_C#fR /I
bFirst = false; \L:+k `
read_nPos(); rGgP9
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} HvJ-P#
else hnTk)nq5#
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nStartPos = new long[bean.getNSplitter()]; ,UATT]>
nEndPos = new long[bean.getNSplitter()]; 6|B;C
} J}Ji /
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} YtFH@M
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public void run() ?!;i/h*{
{ f=kt0
//获得文件长度 [t+qYe8
//分割文件 P ,*yuF|bk
//实例FileSplitterFetch [{-5
//启动FileSplitterFetch线程 wCw_aXqq
//等待子线程返回 ^<`uyY))Q
try{ Nc\jA=
if(bFirst) ;uyQ R8
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nFileLength = getFileSize();
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if(nFileLength == -1) 7f]O /
{ vhz Q.>
System.err.println("File Length is not known!"); 0RGqpJxk
} CQh6;[\:
else if(nFileLength == -2) |TRl>1rv
{ 5$%CRm
System.err.println("File is not access!"); ~zcB@; :
}
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else a'|/=$
{ n|Gw?@CU7
for(int i=0;i<nStartPos.length;i++) (Nn)_caVb
{ <qjolMO`
nStartPos = (long)(i*(nFileLength/nStartPos.length)); '~n=<Y
} 8ps1Q2|
for(int i=0;i<nEndPos.length-1;i++) _[{oK G^u
{ _64<[2
nEndPos = nStartPos[i+1]; <ql:n
} .s`7n
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nEndPos[nEndPos.length-1] = nFileLength; 5O]eD84B
} |3dIq=~1"Y
} K/|qn)
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//启动子线程 nna boD
fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; 6(-c$d`C.0
for(int i=0;i<nStartPos.length;i++) ,'a[1RN
{ a{+;&j[!
fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), [9,34/i
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), my*E7[
nStartPos,nEndPos,i); ,%$Cfu
Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); fk'DJf[M
fileSplitterFetch.start(); 9YVr9BM'K
} 6UAw9
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// fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), jM;?);Dd
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); CQI\/oaO
// Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", ucX!6)Op
nEndPos = " + nFileLength); ~NZ}@J{00_
// fileSplitterFetch[nPos.length-1].start(); 7~2V5@{<
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//等待子线程结束 ,Lr}P
//int count = 0; TF-a1z
//是否结束while循环 mExJ--}
boolean breakWhile = false; #bCzWg
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while(!bStop) )g[7XB/w
{ (F'?c1
write_nPos(); 6;p"xC-
Utility.sleep(500); *#c^.4$'
breakWhile = true; cW?~]E'<
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for(int i=0;i<nStartPos.length;i++) mL]5Tnc
{ r)Fd3)e
if(!fileSplitterFetch.bDownOver) jGFDj"Y
{ jOU1F1
breakWhile = false; 3 ,
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break; ydf;g5OZ
} 2/RW( U
} !Tu4V\^~A
if(breakWhile) 'OvyQ/T
break; ^/"2s}+
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//count++; L]QBh\
//if(count>4) aT}?-CUxx
// siteStop(); P/ 7aj:h~P
} L^{wxOf&6E
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System.err.println("文件下载结束!"); &d&nsQ
} N7}yU~j^
catch(Exception e){e.printStackTrace ();} 'jjJ[16"d
} dY'>'1>P
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//获得文件长度 S\W&{+3
public long getFileSize() c*Q6k<SKR
{ 3?-2~s3gp
int nFileLength = -1; 8npjQ;%4>
try{ 5gH'CzU?
URL url = new URL(siteInfoBean.getSSiteURL()); QIu!o,B
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); %tZ[wwt
httpConnection.setRequestProperty("User-Agent","NetFox"); ;7bY>zc(w
/*hS0xN*
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int responseCode=httpConnection.getResponseCode(); ~_W>ND
if(responseCode>=400) Jec<1|
{ 'Z`fZ5q
processErrorCode(responseCode); _VI3b$
return -2; //-2 represent access is error ~=9]M.$
} )ioIn`g^-
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String sHeader; ]R6Z(^XT,E
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for(int i=1;;i++) A:YWXcg
{ <PTi>C8;r
//DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); g].v
//Utility.log(in.readLine()); Mp)|5<%
sHeader=httpConnection.getHeaderFieldKey(i); uW^ W/S%'
if(sHeader!=null) |
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{ ,7*-%05[\
if(sHeader.equals("Content-Length")) ) kK" 1\m
{ Ps9YP B-
nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); Wkc^?0p
break; VO+3@d:
} ["XS|"DM
} C^!ej"
else E K#ib
break; ^9xsbv
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} 8`;3`lZ
} -[-Ry6G
catch(IOException e){e.printStackTrace ();} &$hT27A>k
catch(Exception e){e.printStackTrace ();} C 8qVYrw
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Utility.log(nFileLength); 6Rc%P)6
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return nFileLength; OCYC
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} B)L;ja
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//保存下载信息(文件指针位置) j aq/]I7
private void write_nPos() ljRR{HOl
{ NZ?| #53
try{ .47tj`L
output = new DataOutputStream(new FileOutputStream(tmpFile)); 4Q
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output.writeInt(nStartPos.length); .Wq"
for(int i=0;i<nStartPos.length;i++) ~L=Idt!9
{ jj*e.t:F
// output.writeLong(nPos); M}W};~V2ng
output.writeLong(fileSplitterFetch.nStartPos); tx{tIw^2;
output.writeLong(fileSplitterFetch.nEndPos); i=8){GX4
} `-[+(+["
output.close(); LTt|"D
} 1$adX
catch(IOException e){e.printStackTrace ();} sKuPV
catch(Exception e){e.printStackTrace ();} 7{:g|dX
} 5N4[hQrVJ
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//读取保存的下载信息(文件指针位置) (VA:`pstP
private void read_nPos() SK_i 3?
{ b1`(f"&l
try{ 4<QSot
DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); lg!{?xM
int nCount = input.readInt(); Pw_[{ LL
nStartPos = new long[nCount]; #3o]Qo[Sc
nEndPos = new long[nCount]; 13:0%IO
for(int i=0;i<nStartPos.length;i++) 1F_ 1bAh$
{ B)`^/^7
nStartPos = input.readLong(); &.t|&8-
nEndPos = input.readLong(); ;Z(~;D
} =\l7k<
input.close(); |xQq+e}l<
} Uv"GG:
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catch(IOException e){e.printStackTrace ();} niIjatT
catch(Exception e){e.printStackTrace ();} 1GL@t?S
} $S0eERga
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private void processErrorCode(int nErrorCode) !^*I?9P
{ <r{ )*]#l
System.err.println("Error Code : " + nErrorCode); k(v8zDq*
} ET7(n0*P}]
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//停止文件下载 -O=a"G=
public void siteStop() (iZE}qf7g
{ X@ Gm:6
bStop = true; );.q:"
for(int i=0;i<nStartPos.length;i++) ;qF#!Kb5
fileSplitterFetch.splitterStop(); (~>L \]!
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} t"@:a
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} _,M:"3;Z
//负责部分文件的抓取 (mJqI)m8
**FileSplitterFetch.java H.ZmLB
*/ Sh_ =dzM
package NetFox; ?"no~(EB
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import java.io.*; g(0
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import java.net.*; $LF
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public class FileSplitterFetch extends Thread { KR6*)?c`
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String sURL; //File URL T$'GFA
long nStartPos; //File Snippet Start Position ?wR;"
long nEndPos; //File Snippet End Position wxg`[c$:
int nThreadID; //Thread's ID RJ_ratKN*g
boolean bDownOver = false; //Downing is over <(Wa8PY2(
boolean bStop = false; //Stop identical <M1XG7_I
FileAccessI fileAccessI = null; //File Access interface g&*pk5V>
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public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException !(hP{k ^g
{ cmIAWFj-)e
this.sURL = sURL; Hiz e
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this.nStartPos = nStart; 7FVu[Qu
this.nEndPos = nEnd; ^#R-_I
nThreadID = id; nNIV(
fileAccessI = new FileAccessI(sName,nStartPos);//定位 _ID2yJ
} Oifu ?f<r
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public void run() nzTzc5
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{ 9_rNJLj8y
while(nStartPos < nEndPos && !bStop) 8E /]k\
{ SrN;S kS
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try{ $;_'5`xs
URL url = new URL(sURL); ,$habq=;
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); m%$z&<!
httpConnection.setRequestProperty("User-Agent","NetFox"); ^b`}g
String sProperty = "bytes="+nStartPos+"-"; 1WPDMLuN
httpConnection.setRequestProperty("RANGE",sProperty); qB_MDA
Utility.log(sProperty); <