/* cu+FM
**SiteFileFetch.java I!^O)4QRx
*/ QY= = GfHt
package NetFox; Y3Q9=u*5
import java.io.*; $ImrOf^qt
import java.net.*; Y))NK'B5
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public class SiteFileFetch extends Thread { 4*$G & TX
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SiteInfoBean siteInfoBean = null; //文件信息Bean rx}r~0i
long[] nStartPos; //开始位置 GgKEP,O
long[] nEndPos; //结束位置 )p*}e8L
FileSplitterFetch[] fileSplitterFetch; //子线程对象 .1LCXW=
long nFileLength; //文件长度 $8BPlqBIZ
boolean bFirst = true; //是否第一次取文件 i~r l o^
boolean bStop = false; //停止标志 z;y:9l
File tmpFile; //文件下载的临时信息 3po:xMY
DataOutputStream output; //输出到文件的输出流 IsR!'%Pu
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//负责整个文件的抓取,控制内部线程(FileSplitterFetch类) Kv~U6_=1O
public SiteFileFetch(SiteInfoBean bean) throws IOException XC+A_"w)
{ S{3nM<
siteInfoBean = bean; /&4U6a
//tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); G}p\8Q}'
tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); 'F3)9&M
if(tmpFile.exists ()) qgrg CJ
{ V*~Zs'L'E
bFirst = false; mkR2i>
read_nPos(); #KO,~]k5|e
} 2it?$8#i
else 3h<,
{ ]kboG%Dl?9
nStartPos = new long[bean.getNSplitter()]; RD.V'`n"
nEndPos = new long[bean.getNSplitter()]; fum0>tff
}
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public void run() k?7 X3/O
{ )rixMl &[
//获得文件长度 edPUG
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//分割文件 IY*EA4>
//实例FileSplitterFetch B-r0"MX&
//启动FileSplitterFetch线程 M>/Zbnq
//等待子线程返回 aCL!]4K84$
try{ jq!tT%o*B
if(bFirst) 4
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{ YX#-nyK
nFileLength = getFileSize(); I"`M@ %
if(nFileLength == -1) 9VbOQ {8
{ /Ju;MeE9
System.err.println("File Length is not known!"); zL J/5&
} y a_<^O
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else if(nFileLength == -2) 3g6j?yYqb
{ ()H:Uv M=t
System.err.println("File is not access!"); Km^&<3ch#
} '{B!6|"X
else 5+wAzVA
{ |ely|U. Tf
for(int i=0;i<nStartPos.length;i++) vEn4L0D
{ M4W5f#C5Ee
nStartPos = (long)(i*(nFileLength/nStartPos.length)); jkvgoxY
} tzh1s
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for(int i=0;i<nEndPos.length-1;i++) nb>7UN.9
{ ,tg0L$qC
nEndPos = nStartPos[i+1]; {+@bZ}57
} ~_!F01s
nEndPos[nEndPos.length-1] = nFileLength; L/z),#
} o-Ga3i 8
} ZR'H\Z
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//启动子线程 RG4 sQ0
fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; O
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for(int i=0;i<nStartPos.length;i++) ]H1I,`=@
{ 9cj9SB4
fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), LA)[ip4
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), %?Ev|:i`@
nStartPos,nEndPos,i); ~T89_L
Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); @qHNE,K
fileSplitterFetch.start(); 6!(@@^7{*
} Q0ON9gqqv
// fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), ,zT y?OQ
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); (zFi$
// Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", k Zq!&
nEndPos = " + nFileLength); L5\WpM=
// fileSplitterFetch[nPos.length-1].start(); eET}r24
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//等待子线程结束 $81*^
//int count = 0; )d>!"JB-
//是否结束while循环 L:'J
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boolean breakWhile = false; 5hy""i
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while(!bStop) 9\DQ>V TQ
{ eh5gjSqx
write_nPos(); 0p\@!Z H
Utility.sleep(500); (/j); oSK
breakWhile = true; W!&vul5
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for(int i=0;i<nStartPos.length;i++) |x-S&-
{ Mwr"~?\\
if(!fileSplitterFetch.bDownOver) .uk>QMs1
{ 82DmG@"s2
breakWhile = false; KkE9KwZ]W
break; ;/rXQe1
} I}vmU^Y>
} !dC<4qZ\C
if(breakWhile) x3"#POp
break; }x
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//count++; 1OF&
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//if(count>4) E3iW-B8u8
// siteStop(); 4BKI-;v$
} \<)9?M :
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System.err.println("文件下载结束!"); M%0C_=zg
} JQ@E>o7_
catch(Exception e){e.printStackTrace ();} [Yc G(^^
} X]dwX%:Z!j
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//获得文件长度 K]0JC/R6(@
public long getFileSize() LmnymcH
{ V:c;-)(
int nFileLength = -1; "PpN0Rr
try{ mA=i)Ga
URL url = new URL(siteInfoBean.getSSiteURL()); Oal3rb
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); Q{lpKe0
httpConnection.setRequestProperty("User-Agent","NetFox"); z21|Dhiw&
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int responseCode=httpConnection.getResponseCode(); >b{q.
if(responseCode>=400) %eO0wa$a
{ .ODR ]7{
processErrorCode(responseCode); q*7VqB
return -2; //-2 represent access is error c>)Yt^q&K
} Aw5HF34J
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String sHeader; yLQ*"sw\
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for(int i=1;;i++) dKxyA"@
{ _`:1M2=
//DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); PU1Qsb5
//Utility.log(in.readLine()); trp0V4b8
sHeader=httpConnection.getHeaderFieldKey(i); [S>2ASj
if(sHeader!=null) ~"kb7Fxp
{ Ot6aRk
if(sHeader.equals("Content-Length")) pv Gf\pu
{
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nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); D5*q7A6
break; `,(,tn_
} ZGKu>yM
} q;][5
else :dQ B R
break; G%W8S
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} /Y7<5!cS
} j4uvS!
catch(IOException e){e.printStackTrace ();} --c"0,7
catch(Exception e){e.printStackTrace ();} sv&;Y\2c
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Utility.log(nFileLength); tE`u(B,
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return nFileLength; u*ObwcI/Bn
} u /\EtSH
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//保存下载信息(文件指针位置) O4V.11FnW
private void write_nPos() KQg]0y
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{ 9|gr0~j
try{ 2h1vVF3
output = new DataOutputStream(new FileOutputStream(tmpFile)); t_$2CRG#
output.writeInt(nStartPos.length); Pn>Xbe
for(int i=0;i<nStartPos.length;i++) 'DL`Ee\
{ r'HtZo$^R
// output.writeLong(nPos); G#u6Am)T
output.writeLong(fileSplitterFetch.nStartPos); e3nYbWBy]
output.writeLong(fileSplitterFetch.nEndPos); !FElW`F
} [k;\S XDZo
output.close(); AN/;)wc
} :lPb.UCY
catch(IOException e){e.printStackTrace ();} n
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catch(Exception e){e.printStackTrace ();} Ne[7gxpu
} < v@9#c
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//读取保存的下载信息(文件指针位置) 'z%o16F)L
private void read_nPos() YH\OFg@7
{ )\J+Kiy)
try{ pH"#8O&
DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); \b?" b
int nCount = input.readInt(); vnM@QfN
nStartPos = new long[nCount]; P;qN(2L/=<
nEndPos = new long[nCount]; q#,f 4P
for(int i=0;i<nStartPos.length;i++) 7G}2,ueI
{ ;
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nStartPos = input.readLong(); 'kL#]
nEndPos = input.readLong(); <~n"m
} $JMXV
input.close(); %&w3;d;c
} Wp!%-vzy&
catch(IOException e){e.printStackTrace ();} sP;nGQ.eN
catch(Exception e){e.printStackTrace ();} NnDxq%l%
} x:7b/j-
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private void processErrorCode(int nErrorCode) !O:y@
{ y}My.c
System.err.println("Error Code : " + nErrorCode); 8o'_`{ba
} :+z4~%
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//停止文件下载 `Nb[G)Xh
public void siteStop() I+[>I=ewa
{ T>2[=J8U
bStop = true; X[&Wkr8x '
for(int i=0;i<nStartPos.length;i++) ymx>i~>7J
fileSplitterFetch.splitterStop(); ,^w?6?,&l}
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} zxbpEJzpn
} 8&?s#5zA
//负责部分文件的抓取 i]6`LqlO
**FileSplitterFetch.java hRrn$BdLX
*/ XINu=N(g
package NetFox; ZjQ
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import java.io.*; 2.l Z:VLN
import java.net.*; ^Eb.:}!D6
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public class FileSplitterFetch extends Thread { |
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String sURL; //File URL BGD8w2
long nStartPos; //File Snippet Start Position ]
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long nEndPos; //File Snippet End Position |"/8XA
int nThreadID; //Thread's ID %_RQx2
boolean bDownOver = false; //Downing is over D#il*
boolean bStop = false; //Stop identical /H(?
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FileAccessI fileAccessI = null; //File Access interface a!<8\vzg
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public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException Crho=RJPR
{ %|g>%D3Z?
this.sURL = sURL; TDFkxB>
this.nStartPos = nStart; #h8Sq~0
this.nEndPos = nEnd; zF8dKFE~
nThreadID = id; :Q $K<)[
fileAccessI = new FileAccessI(sName,nStartPos);//定位 7VqM$I
} /%}*Xh
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public void run() 6K-_pg]
{ r@+ri1c
while(nStartPos < nEndPos && !bStop) OWjk=u2Lz
{ `e}bdj
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try{ 2Ga7$q
URL url = new URL(sURL); hb zC#@q
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); \ 3wfwu.q
httpConnection.setRequestProperty("User-Agent","NetFox"); 7\$qFF-y
String sProperty = "bytes="+nStartPos+"-"; 75"f2;
httpConnection.setRequestProperty("RANGE",sProperty); -:2$ %
Utility.log(sProperty); dJ2Hr;Lc
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InputStream input = httpConnection.getInputStream(); 7n8~K3~;
//logResponseHead(httpConnection); _=Z,E.EN
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byte[] b = new byte[1024]; ~$:|VHl
int nRead; &x[E;P*Fg
while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) }!"A! ~&
{ P&9Gga^I
nStartPos += fileAccessI.write(b,0,nRead); v 1z
//if(nThreadID == 1) \K@'Z
// Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); Cjqklb/
} iop2L51eJ
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Utility.log("Thread " + nThreadID + " is over!"); e+$p9k~
bDownOver = true; +$C4\$t
//nPos = fileAccessI.write (b,0,nRead); 8jd;JPz@\
} P
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catch(Exception e){e.printStackTrace ();} %QH)' GJQ
} |Y$uqRdV
} *)ardZV${
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s} UjGFP
//打印回应的头信息 UDL!43K
public void logResponseHead(HttpURLConnection con) +Z7th7W/,
{ hd>aZ"nm1
for(int i=1;;i++) _/uFsYC
{ K/tRe/t}
String header=con.getHeaderFieldKey(i); 6-yd]("
if(header!=null) "U!AlZ`g
//responseHeaders.put(header,httpConnection.getHeaderField(header)); WG N=Y~E
Utility.log(header+" : "+con.getHeaderField(header)); d
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else !>{G,\^=pT
break; TH; R
} & -{DfNK c
} ]h>_\9qO
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public void splitterStop() QrB@cK]
{ KM}f:_J*lg
bStop = true; qfL~Wp2E;
} Ge-CY
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} aGJC1x
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/* mQCeo}7N5
**FileAccess.java WFO4gB*
*//文件访问(定位,写) }4Tc
package NetFox; YVYu:}e3)
import java.io.*; $}J5xG,}$
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public class FileAccessI implements Serializable{ {Or;
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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 lJu;O/
RandomAccessFile oSavedFile; J?Ra bYd ~
long nPos; KNS.Nw7
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public FileAccessI() throws IOException (8Bk;bd
{ x^kp^
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this("",0); &