/* J)_42Z
**SiteFileFetch.java hGLBFe#3
*/ V7<}
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package NetFox; ~Gza$ K
import java.io.*; (A_9;uL^_
import java.net.*; >E# 4mm
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public class SiteFileFetch extends Thread { UWp(3FQ
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SiteInfoBean siteInfoBean = null; //文件信息Bean o/#e
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long[] nStartPos; //开始位置 j~0hAKHG
long[] nEndPos; //结束位置 lDzVc`c
FileSplitterFetch[] fileSplitterFetch; //子线程对象 d!cx%[
long nFileLength; //文件长度 li?Gb1
boolean bFirst = true; //是否第一次取文件 GzX@Av$
boolean bStop = false; //停止标志 S6uBk"V!
File tmpFile; //文件下载的临时信息 lK0coj1+
DataOutputStream output; //输出到文件的输出流 coBxZyM 1}
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//负责整个文件的抓取,控制内部线程(FileSplitterFetch类) L
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public SiteFileFetch(SiteInfoBean bean) throws IOException Wk?XlCj
{ nBd;d}LD
siteInfoBean = bean; uWSG+
//tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); "cZ.86gG`:
tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); *!r8HV/<
if(tmpFile.exists ()) 3-0Y<++W3>
{ vnE,}(M
bFirst = false; 3mWN?fC
read_nPos(); OLq/OO,w
} H4U;~)i
else [&$z[/4:8c
{
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nStartPos = new long[bean.getNSplitter()]; *KNR",.
nEndPos = new long[bean.getNSplitter()]; %O-wMl
} G7u7x?E:B`
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} '`n\YO.N
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public void run() l\H9Io3
{ Z=ho7i
//获得文件长度 TAP/gN'
//分割文件 Rh39x-`Z
//实例FileSplitterFetch
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//启动FileSplitterFetch线程 a,X3=+_K
//等待子线程返回 `y4+OXZ^
try{ C M(g4fh
if(bFirst) iIg_S13
{ Z"A:^jZ<s
nFileLength = getFileSize(); !HFwQGP.Y
if(nFileLength == -1) 1cPi>?R:
{ Z|u_DaSrr|
System.err.println("File Length is not known!"); w] VvH"?
} OF)X(bi4j
else if(nFileLength == -2) *<KY^;
{ Li}yK[\]
System.err.println("File is not access!"); nG2RBeJV
} <=p"ck@
else lPjgBp{/
{ w!Z3EA ;`
for(int i=0;i<nStartPos.length;i++) GerZA#
{ 0=~Ji_5mB
nStartPos = (long)(i*(nFileLength/nStartPos.length)); <I7UyCAF
} & )Z JT.S
for(int i=0;i<nEndPos.length-1;i++) P;h/)-q8
{ QJxcH$
nEndPos = nStartPos[i+1]; ~*&_zPTN
} Mb-C DPT
nEndPos[nEndPos.length-1] = nFileLength; 27)$;1MT:
} hsi#J^n{
} f"/NY6
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//启动子线程 tP`,Egf"g
fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; N52N ^X>
for(int i=0;i<nStartPos.length;i++) p<
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{ H}A67J9x
fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), !r$/-8b
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), ~s+\Y/@A
nStartPos,nEndPos,i); kIQMIL0+
Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); B<i1UJ5
fileSplitterFetch.start(); GZ9XG">
} o)w'w34FCT
// fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), =*t)@bn
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); Dp>/lkk.
// Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", 8I
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nEndPos = " + nFileLength); ?'^xO:
// fileSplitterFetch[nPos.length-1].start(); a93Aj
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//等待子线程结束 ^,,|ED\M{m
//int count = 0; *PD7H9m
//是否结束while循环 |ML|P\1&V
boolean breakWhile = false; B\BP:;"
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while(!bStop) 0&zp9(G5
{ -K PbA`j+
write_nPos(); ,9=5.+AJ
Utility.sleep(500); ZfoI7<?33
breakWhile = true; @r=O~x
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for(int i=0;i<nStartPos.length;i++) TtlZum\
{ 90(JP-
if(!fileSplitterFetch.bDownOver) tK1P7pbC8r
{ kowBB0
breakWhile = false; _A1r6
break; Z+JPxe#7
} _>0I9.[5
} @} qMI
if(breakWhile) qo/`9%^E?
break; ZE#A?5lb
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//count++; ,x&T8o/a
//if(count>4) V-IXtQR
// siteStop(); ?`lIsd
} )$XcO]
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System.err.println("文件下载结束!"); "`s{fy~mV
} Bz!SZpW(M
catch(Exception e){e.printStackTrace ();} M*$#j|
} 6C7|e00v
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//获得文件长度 K+p7yZJ
public long getFileSize() \2#7B8
{ ~nDbWv"
int nFileLength = -1; bdbTK8-
try{ Lk#8G>U
URL url = new URL(siteInfoBean.getSSiteURL()); a'r8J~:jy
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); EIug)S~
httpConnection.setRequestProperty("User-Agent","NetFox"); clyZD`*
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int responseCode=httpConnection.getResponseCode(); OiI29
if(responseCode>=400)
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{ 'ioX,KD
processErrorCode(responseCode); yGj'0c::
return -2; //-2 represent access is error Z}$wvd
} 2Kwr=t
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String sHeader; #:[^T,YD0
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for(int i=1;;i++) 4fSGc8
{ x<d2/[(}mT
//DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); cb82k[L6
//Utility.log(in.readLine()); q[}W&t,
sHeader=httpConnection.getHeaderFieldKey(i); q!f'?yFYK
if(sHeader!=null) uidoz
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{ vLI'Z)\
if(sHeader.equals("Content-Length")) CT{mzC8
{ A9Kt^HR
nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); o3C GG
break; xlIVLv6dO
} "*8>` 6 E
} &a8%j+j
else R/EpfYOX
break; JIatRc?g
} Fa0Fl}L
} Fe L !%z
catch(IOException e){e.printStackTrace ();} s+0n0C
catch(Exception e){e.printStackTrace ();} adY ,Nz
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Utility.log(nFileLength); 1$_|h@
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return nFileLength; _J&IL!S2
} ROi_k4Fj
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//保存下载信息(文件指针位置) o)WzZ,\F^J
private void write_nPos() F]GX;<`
{ `D $ "K1u
try{ kF-7OX0)
output = new DataOutputStream(new FileOutputStream(tmpFile));
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output.writeInt(nStartPos.length); yYH>~,
for(int i=0;i<nStartPos.length;i++) 3w&Z:<
{ _a\$uVZ
// output.writeLong(nPos); d1}cXSQ1T
output.writeLong(fileSplitterFetch.nStartPos); yk0^m/=C(
output.writeLong(fileSplitterFetch.nEndPos); -&h<t/U
} @yNCWa~N
output.close(); (j&7`9<5
} \2 Yo*jE}
catch(IOException e){e.printStackTrace ();} &ox5eX(
catch(Exception e){e.printStackTrace ();} .R^q$U~v3
} a(_3271
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//读取保存的下载信息(文件指针位置) W~& QcSWqD
private void read_nPos() (V>/[Ev
{ 'tDVSj
try{ DD'RSV5]
DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); ,8.zbr
int nCount = input.readInt(); LIRL`xU7
nStartPos = new long[nCount]; Og1Hg
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nEndPos = new long[nCount]; wV q4DE
for(int i=0;i<nStartPos.length;i++) H<Zs2DP`
{ v*&WqVg
nStartPos = input.readLong(); #]2,1dJ
nEndPos = input.readLong(); "y-/ 9C
} i\zN1T_
input.close(); PEMuIYm$
} Z8:'_#^@a[
catch(IOException e){e.printStackTrace ();} DI\^&F)3T2
catch(Exception e){e.printStackTrace ();} e@ DVf
} qf*e2"~v
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private void processErrorCode(int nErrorCode) /mQ9}E4X
{ Mb+CtI_'
System.err.println("Error Code : " + nErrorCode); \eCQL(_
} pAH9
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//停止文件下载 jN%+)Kj0C)
public void siteStop() KV|ywcGhT
{ pW5PF)([
bStop = true; yb-/_{Y
for(int i=0;i<nStartPos.length;i++) "uU[I,h
fileSplitterFetch.splitterStop(); TnLblkX
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} v]m#+E
} Ip*[H#h
//负责部分文件的抓取 ~p$ncIr2Q
**FileSplitterFetch.java 2KSt4oa
*/ GI/4<J\
package NetFox; }J] P`v
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import java.io.*; l 5z8]/
import java.net.*; D}K/5iU]a
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public class FileSplitterFetch extends Thread { fZt3cE\
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String sURL; //File URL .iH#8Z
long nStartPos; //File Snippet Start Position l&m'?.gf
long nEndPos; //File Snippet End Position Clzz!v
int nThreadID; //Thread's ID ppPzI,
boolean bDownOver = false; //Downing is over >Av%[G5=h#
boolean bStop = false; //Stop identical }$1Aw%p^
FileAccessI fileAccessI = null; //File Access interface ^g*/p[
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public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException ^<nN~@j
{ \ /6m
this.sURL = sURL; eO=!(
this.nStartPos = nStart; U-GV^j
this.nEndPos = nEnd;
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nThreadID = id; pd
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fileAccessI = new FileAccessI(sName,nStartPos);//定位 ?u8vK<2h
} 8v']>5S]#
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public void run() b{Kw.?85
{ 7<c&)No;
while(nStartPos < nEndPos && !bStop) {T[/B"QZG
{ -Fs^^={Q
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try{ B^G{k3]t
URL url = new URL(sURL); ?#X`Eu
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); nW
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httpConnection.setRequestProperty("User-Agent","NetFox"); i iZK^/P$
String sProperty = "bytes="+nStartPos+"-"; P=9Zm
httpConnection.setRequestProperty("RANGE",sProperty); dSBW&-p
Utility.log(sProperty); n"{oj7E0a
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InputStream input = httpConnection.getInputStream(); o$r]Z1
//logResponseHead(httpConnection); Zm@
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UW}
byte[] b = new byte[1024]; Cz_chK4
int nRead; 6\9 9WQ
while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) ;{inhiySN
{ ')w*c
nStartPos += fileAccessI.write(b,0,nRead); mckrR$>
//if(nThreadID == 1) S,,3h0$X
// Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); <P3r}|K
} %.R_[.W
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Utility.log("Thread " + nThreadID + " is over!"); {q:o}<-L+
bDownOver = true; 0Fh*8a}?b
//nPos = fileAccessI.write (b,0,nRead); bMD'teJ
} %?EOD=e=
catch(Exception e){e.printStackTrace ();} 8D:{05
} #={L!"3?e
} 0ZV)Y<DJ
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//打印回应的头信息 hqY9\,.C
public void logResponseHead(HttpURLConnection con) (r.{v@h,dV
{ 5 b[:B~J
for(int i=1;;i++) 6Bp{FOj:Ss
{ L&'0d$Tg8
String header=con.getHeaderFieldKey(i); K`FgU7g{
if(header!=null) k[Iwxl;/
//responseHeaders.put(header,httpConnection.getHeaderField(header)); ~&~%q u
Utility.log(header+" : "+con.getHeaderField(header)); D.<CkDB
else 0{Kl5>Z9M
break; dTaR8i
} 7`tnoTUv
} 9kP!O_
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public void splitterStop() @WU_GQas3
{ 2ezuP F
bStop = true; $YSD%/c
} );z}T0C
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} ojVpw4y.
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/* 0m`7|80#P
**FileAccess.java z[v5hhI)4
*//文件访问(定位,写) n/?5[O-D]
package NetFox; B;;D(NH
import java.io.*; &J hN&Ur
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public class FileAccessI implements Serializable{ G>mgoN
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//RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 Pz|qy,
RandomAccessFile oSavedFile; &"tce6&
long nPos; r$v?[x>+K
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public FileAccessI() throws IOException <YeF?$S}
{ G<jpJ
this("",0); U-FA^c;
} 6@XutciK
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@L<[38
public FileAccessI(String sName,long nPos) throws IOException DQlaSk4hF_
{ b7AuKY{L
oSavedFile = new RandomAccessFile(sName,"rw"); HnP;1Gi
this.nPos = nPos; oLr"8R\d>t
oSavedFile.seek(nPos); !W%HAlUAG[
} X^|oY]D
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public synchronized int write(byte[] b,int nStart,int nLen) 0= 'DDy
{ : l>Ue&
int n = -1; @>9p2u)=
try{ TLSy+x_gX
oSavedFile.write(b,nStart,nLen); B?0{=u
n = nLen; u\e#_*>
} j^%i?BWw
catch(IOException e) btOTDqG`a
{ =H,cwSE+%
e.printStackTrace (); 7t04!dD}
} CMBW]b|
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return n; 4[J3HLQ
} ,#wVqBEk
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} {-Y_8@&