/* qc(e3x
**SiteFileFetch.java :Wbp|:N0
*/ kqB# 9
package NetFox; SPqJ
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import java.io.*; uO4
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import java.net.*; 3eY>LWx
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public class SiteFileFetch extends Thread { lw3H
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SiteInfoBean siteInfoBean = null; //文件信息Bean i ;B^I8
long[] nStartPos; //开始位置 5WI
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long[] nEndPos; //结束位置 "|JbdI]%P
FileSplitterFetch[] fileSplitterFetch; //子线程对象 \PS]c9@,rc
long nFileLength; //文件长度 <lzC|>BG
boolean bFirst = true; //是否第一次取文件 OV{v6,>O
boolean bStop = false; //停止标志 lITd{E,+r
File tmpFile; //文件下载的临时信息 82FEl~,^E
DataOutputStream output; //输出到文件的输出流 h[dJNawL
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//负责整个文件的抓取,控制内部线程(FileSplitterFetch类) 7 7bwYKIn
public SiteFileFetch(SiteInfoBean bean) throws IOException k
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{ )2c]Z|
siteInfoBean = bean; /)[-5n{
//tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); Z"c-Ly{vEj
tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); P[fy
if(tmpFile.exists ()) |mMsU,*gB
{ R+.4|1p
bFirst = false; k2Cq9kQ q
read_nPos(); }"+"nf5h
} e/hCYoS1n
else G^{~'TZv%
{ "d<ucj
nStartPos = new long[bean.getNSplitter()]; (A=PDjP!
nEndPos = new long[bean.getNSplitter()]; EY]H*WJJ
} *
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public void run() RF*>U a
{ rOOo42YW`
//获得文件长度
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//分割文件 v8F{qT50
//实例FileSplitterFetch 62nmm/c
//启动FileSplitterFetch线程 Kz
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//等待子线程返回 !84Lvg0&
try{ yl?LXc[)
if(bFirst) W?SAa7+
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nFileLength = getFileSize(); ^+-QY\N
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if(nFileLength == -1) X8v)yDtw
{ a5Vlfx
System.err.println("File Length is not known!"); {;Hg1=cm
} !Gnm<|.
else if(nFileLength == -2) $m
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{ hpQ #`rhn
System.err.println("File is not access!"); 1q;R+65
} .@x.
else Z42q}Fhm*R
{ (~Bm\ Jn
for(int i=0;i<nStartPos.length;i++) E
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nStartPos = (long)(i*(nFileLength/nStartPos.length)); M#Z^8(
} E
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for(int i=0;i<nEndPos.length-1;i++) H.M:
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{ xY)eU;*
nEndPos = nStartPos[i+1]; pS-o*!\C.
} r;b `@
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nEndPos[nEndPos.length-1] = nFileLength; Y->sJm
} gna!Q
} q=e;P;u
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//启动子线程 8m
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fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; +Y*4/w[
for(int i=0;i<nStartPos.length;i++) c|:EMYS
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fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), y}FG5'5$13
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), xN$V(ZX4
nStartPos,nEndPos,i); fFVQu\
Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); /Gnt.%y&
fileSplitterFetch.start(); {{gd}g
} k6DJ(.n'%a
// fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), E9k%:&]vd
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); +z9BWo!{I
// Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", |Zn;O6c#L5
nEndPos = " + nFileLength); "1""1";
// fileSplitterFetch[nPos.length-1].start(); e+#Oj
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//等待子线程结束 iuqJPW^}
//int count = 0; >r)UDa+
//是否结束while循环 ;s~xS*(C
boolean breakWhile = false; ZwxEcs+UM
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while(!bStop) 6`7`herE}
{ kLs{B
write_nPos(); =}%:4
Utility.sleep(500); lpd~U 2&
breakWhile = true; o4 "HE*
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for(int i=0;i<nStartPos.length;i++) L4+R8ojG
{ J7wwM'\
if(!fileSplitterFetch.bDownOver) r_ m|?U
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breakWhile = false; ku57<kb
break; [GM!@6U
} EQ"_kJ>81Y
} rY&lx}
if(breakWhile) 6_8y Q
break; qc'KQ5w7!
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//count++; MC-Z6l2
//if(count>4) =.J>'9 Q
// siteStop(); -q)|I|y*7
} U3aM^
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System.err.println("文件下载结束!"); e?XGv0^qu
} U1yspHiZ
catch(Exception e){e.printStackTrace ();} -hF!_);{
} oQVm)Bn'R
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//获得文件长度 -'oxenu
public long getFileSize() Ss{5'SF)$c
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int nFileLength = -1; .GYdC'
try{ \'w.<)(GI
URL url = new URL(siteInfoBean.getSSiteURL()); w4^$@GtN
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); ^eV K.
httpConnection.setRequestProperty("User-Agent","NetFox"); }f{5-iwD}
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int responseCode=httpConnection.getResponseCode(); ~y 2joStx
if(responseCode>=400) vPZ0?r_5W
{ 7k#>$sY+
processErrorCode(responseCode); HWL? doM
return -2; //-2 represent access is error 0|hOoO]?q&
} v-F|#4Q=ut
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String sHeader; Efd@\m:~>
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for(int i=1;;i++) X)TZ S
{ 8BY`~TZO$q
//DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); /K,@{__JP
//Utility.log(in.readLine()); |e+r~).4B
sHeader=httpConnection.getHeaderFieldKey(i); T/%k1Hsa4H
if(sHeader!=null) EcR[b@YI
{ t1#f*G5
if(sHeader.equals("Content-Length")) vl`St$$|
{ \WUCm.w6\%
nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); *=%`f=
break; /byF:iYI
} bL:+(/:
} ldKLTO*&
else )C$Ij9<A
break; Py9:(fdS
} m KKa0"
} N>j*{]OY+{
catch(IOException e){e.printStackTrace ();} I$TD[W
catch(Exception e){e.printStackTrace ();} s,laJf
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Utility.log(nFileLength); >^f]Lgp
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return nFileLength; !$-QWKD4
}
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//保存下载信息(文件指针位置) "LZv\c~v,%
private void write_nPos() esv<b>`R
{ `1
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try{ }V+&o\4
output = new DataOutputStream(new FileOutputStream(tmpFile)); M7gqoJM'Q
output.writeInt(nStartPos.length); m}m|(;T
for(int i=0;i<nStartPos.length;i++) {X\FS
{ |z)7XK
// output.writeLong(nPos); O4W2X@
output.writeLong(fileSplitterFetch.nStartPos); XQ Si
output.writeLong(fileSplitterFetch.nEndPos); M%eTNsbNm
} H M\}C.u
output.close(); [}l
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} ?zXlLud8
catch(IOException e){e.printStackTrace ();} rqM_#[Y?
catch(Exception e){e.printStackTrace ();} ${UH!n{
} k~1{|HxrE
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//读取保存的下载信息(文件指针位置) #/K71Y
private void read_nPos() ?l
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{ Nu; 9
try{ cl'qw##
DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); 0te[i*G
int nCount = input.readInt(); $O9#4A;
nStartPos = new long[nCount]; I]~UOl
nEndPos = new long[nCount]; i:^
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for(int i=0;i<nStartPos.length;i++) *pGbcBQ
{ Js,.$t
nStartPos = input.readLong(); `b5pa `\4
nEndPos = input.readLong(); Ed"p|5~
} G7HvA46
input.close(); .!1E7\
} oPA m*
catch(IOException e){e.printStackTrace ();} s.!gsCQme
catch(Exception e){e.printStackTrace ();} V#-8[G6Ra
} 4L2TsuLw
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private void processErrorCode(int nErrorCode) )}\J
{ n6GB2<y
System.err.println("Error Code : " + nErrorCode); z0tm3ovp
} {,o 0N\(
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//停止文件下载 *i7|~q/u
public void siteStop() rge/qUr/^
{ :LR>U;2
bStop = true; )G|'PXI@,
for(int i=0;i<nStartPos.length;i++) @(e/Y/
fileSplitterFetch.splitterStop(); cfW;gFf
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} ?w "zW6U
} Mg{=(No
//负责部分文件的抓取 1&YkRCn0
**FileSplitterFetch.java h\OMWJ~
*/ @w[HXb
package NetFox; 0qo:M3
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import java.io.*; HS
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import java.net.*; 1:q5h*
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public class FileSplitterFetch extends Thread { @avG*Mr^
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String sURL; //File URL ,A!0:+
long nStartPos; //File Snippet Start Position p+1kU1F0
long nEndPos; //File Snippet End Position 'di(5
int nThreadID; //Thread's ID Eg#WR&Uq"
boolean bDownOver = false; //Downing is over ksli-Px
boolean bStop = false; //Stop identical e:RgCDWL
FileAccessI fileAccessI = null; //File Access interface XRWy#Pj
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public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException T
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{ yK:b$S
this.sURL = sURL; hxuc4C\J
this.nStartPos = nStart; :pgpE0
this.nEndPos = nEnd; &qae+p?
nThreadID = id; rIWQD%Afm
fileAccessI = new FileAccessI(sName,nStartPos);//定位 m3 W
} 7F wot&