/* _C&XwCIm
**SiteFileFetch.java KrzIL[;2o
*/ F=9-po
package NetFox; r J^*8C!
import java.io.*; *_,: &Ur
import java.net.*; Ce.*yO<-
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public class SiteFileFetch extends Thread { 0V!@*Z
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SiteInfoBean siteInfoBean = null; //文件信息Bean /@xL {
long[] nStartPos; //开始位置 .{t]Mc
long[] nEndPos; //结束位置 |k[hk
FileSplitterFetch[] fileSplitterFetch; //子线程对象 hha!uD~(
long nFileLength; //文件长度 dZ;rn!dg>
boolean bFirst = true; //是否第一次取文件 s^lm
81;
boolean bStop = false; //停止标志 ^a #
File tmpFile; //文件下载的临时信息 C%T$l8$
DataOutputStream output; //输出到文件的输出流 \*i[m&3;q
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//负责整个文件的抓取,控制内部线程(FileSplitterFetch类) FrL
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public SiteFileFetch(SiteInfoBean bean) throws IOException F*{1, gb
{ mO0a: i!
siteInfoBean = bean; I;rh(FMV
//tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); N&YQZ^o
tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); E!]d?t3b
if(tmpFile.exists ()) ;]I~AGH:
{ *m.4)2u=
bFirst = false; f)9{D[InM^
read_nPos(); ZD`p$:pT
} RuBL_Vi
else 7Pp~)Kq=
{ JXKo zy41
nStartPos = new long[bean.getNSplitter()]; me`|i-
nEndPos = new long[bean.getNSplitter()]; %}ASll0uq
} NxzRVsNF
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} D]B;5f
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public void run() -l i71.M
{ 3uJ>:,~r
//获得文件长度 =cKrp'
//分割文件 5lYzgt-oP
//实例FileSplitterFetch *R8qnvE\()
//启动FileSplitterFetch线程 M7.
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//等待子线程返回 1Uf8ef1,
try{ 1WJ%n;
if(bFirst) :!WKD@]
{ -h1FrDBt
nFileLength = getFileSize(); ~9h/{$
if(nFileLength == -1) ZB5u\NpcW
{ v3Xt<I=4y
System.err.println("File Length is not known!"); C#@>osC
} P%_PG%O2p
else if(nFileLength == -2) yaW HGre
{ YM4njkI7
System.err.println("File is not access!"); Q~>="Yiu
} QbG`F8dj
else b_%W*Q
{ C=!YcJ9
for(int i=0;i<nStartPos.length;i++) |p"4cG?)
{ M F_VMAq
nStartPos = (long)(i*(nFileLength/nStartPos.length)); A;e0h)F$-
} <rAWu\d;
for(int i=0;i<nEndPos.length-1;i++) 6"PwOEt
{ n^:Wc[[m
nEndPos = nStartPos[i+1]; +E8}5pDt
} e_z"<yq
nEndPos[nEndPos.length-1] = nFileLength; ^e4y:# Nu
} e,rCutA)
} QCVwslj,K
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//启动子线程 q@8j[15
fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; Yt#e[CYnu
for(int i=0;i<nStartPos.length;i++) 81&5g'
{ r5(-c]E7
fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), [2Rw)!N
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), xGVL|/?8
nStartPos,nEndPos,i); 1 6G/'Hb
Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); 9<Kc9Z
fileSplitterFetch.start(); p&<X&D
} v.pj
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// fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), }Pf7YuUZZ
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); #M5[TN!
// Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", Tt*n.HA
nEndPos = " + nFileLength);
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// fileSplitterFetch[nPos.length-1].start(); DX)T}V&mP
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//等待子线程结束 +'f38D*
//int count = 0; '@
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//是否结束while循环 pGh A
boolean breakWhile = false; 3t^r;b
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while(!bStop) ^d[s*,i?
{ p@x1B
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write_nPos(); hp6%zUR
Utility.sleep(500); wU =@,K
breakWhile = true; 2 bQC2
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for(int i=0;i<nStartPos.length;i++) vJE>H4qPmD
{ JJe?Zu\
if(!fileSplitterFetch.bDownOver) %U$PcHOo
{ J;S@Q/s
breakWhile = false; is,r:
break; ]/C1pG*o
} yg-uL48q
} `fUem,$)1F
if(breakWhile) <D!\"C
break; $xU5vCwAo
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//count++; |[]"{Eo"}
//if(count>4) 2n`OcXCh/
// siteStop(); #Kp/AN5YC
} oztfr<cUH
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System.err.println("文件下载结束!"); WF{rrU:
} Gj}P6V_
catch(Exception e){e.printStackTrace ();} BHW8zY=F
} XCTee
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//获得文件长度 RO1xcCp
public long getFileSize() 9G'Q3?
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int nFileLength = -1; e2?7>?
try{ !SFF 79$c
URL url = new URL(siteInfoBean.getSSiteURL()); R;*3";+v|:
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); N>$Nw<wV
httpConnection.setRequestProperty("User-Agent","NetFox"); t6)wR
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int responseCode=httpConnection.getResponseCode(); Y:0SrB!\
if(responseCode>=400) fEl,jA
{ 4Fr\=TX
processErrorCode(responseCode); fem>WPvG
return -2; //-2 represent access is error ~Z'3(n*9
} |<n+6
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String sHeader; W&U
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for(int i=1;;i++) M)U 32gI:
{ HZ1e~IIw
//DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); @qfVt
//Utility.log(in.readLine()); )&j4F)
sHeader=httpConnection.getHeaderFieldKey(i); 7O)U(<70
if(sHeader!=null) [8VB"{{&
{ TuBl9 p'6
if(sHeader.equals("Content-Length")) ]tVU$9D
{ tCk;tu!d
nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); ">G|\_ZF
break; Vc!;O9dP
} 'j)xryw
} 0.~Pzg
else L{)e1 p]q
break; !6pOY*> j
} FX FTf2*T
} xsx
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catch(IOException e){e.printStackTrace ();} 62&(+'$n
catch(Exception e){e.printStackTrace ();} Ew=8"V`C
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Utility.log(nFileLength); \S)\~>.`y!
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return nFileLength; >C`b4xQ
} 1A4!zqT;
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//保存下载信息(文件指针位置) 1Z +3=$P
private void write_nPos() [=Y @Ul
{ g3%Xh0007{
try{ k;w1y(
output = new DataOutputStream(new FileOutputStream(tmpFile)); `4RraJj>0~
output.writeInt(nStartPos.length); @N,EoSb :
for(int i=0;i<nStartPos.length;i++) $#g1Mx{
{ <|NP!eMsw8
// output.writeLong(nPos); 4eym$UWw
output.writeLong(fileSplitterFetch.nStartPos); X=Q)R1~6v
output.writeLong(fileSplitterFetch.nEndPos); :!M/9D*}0
} #ra~Yb-F
output.close(); V fJYYR
} vs/.'yD/C
catch(IOException e){e.printStackTrace ();} vr|9NP]v
catch(Exception e){e.printStackTrace ();} !_VKJZuH
} Lt+ Cm$3
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//读取保存的下载信息(文件指针位置) Ji_3*(
private void read_nPos() 3[E3]]OVa
{ u=h:d+rq@
try{ kzG mDi
DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); {$,e@nn
int nCount = input.readInt(); :A\8#]3
nStartPos = new long[nCount]; ~a:0Q{>a
nEndPos = new long[nCount]; 8.
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for(int i=0;i<nStartPos.length;i++) 8,p nm
{ hBf0kl
nStartPos = input.readLong(); Fu0 dYN
nEndPos = input.readLong(); NKD<VMcqw
} :?s~,G_*l
input.close(); M-3kF"
} d0y
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catch(IOException e){e.printStackTrace ();} CA)DQYp{
catch(Exception e){e.printStackTrace ();} "P<IQx
} gnW`|-:\
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private void processErrorCode(int nErrorCode) #5xK&qA
{ Y
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System.err.println("Error Code : " + nErrorCode); ~6z<tyD^
} {OP[Rrm
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//停止文件下载 3~~Kt H=
public void siteStop() DIH|6R
{ =7@N'xX
bStop = true; {ZiJnJX
for(int i=0;i<nStartPos.length;i++) bI
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fileSplitterFetch.splitterStop(); :c@v_J6C&
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} i>YD_#w
} fr$E'+l)
//负责部分文件的抓取 }{Ab:+aNd
**FileSplitterFetch.java
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*/ T u>5H`
package NetFox; DT`TA#O
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import java.io.*; 0b%"=J2/p.
import java.net.*; {.=089`{
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public class FileSplitterFetch extends Thread { vt@5Hb)
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String sURL; //File URL
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long nStartPos; //File Snippet Start Position '\8gY((7
long nEndPos; //File Snippet End Position k%|7H,7
int nThreadID; //Thread's ID *Y"Kbn6
boolean bDownOver = false; //Downing is over o2
boolean bStop = false; //Stop identical XKD0n^L[
FileAccessI fileAccessI = null; //File Access interface h.PVR Awk
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public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException f%fD>a
{ `yYo Vu*
this.sURL = sURL; U.]5UP:a
this.nStartPos = nStart; -`nQa$N-
this.nEndPos = nEnd; LT7C>b
nThreadID = id; qdkhfm2(K
fileAccessI = new FileAccessI(sName,nStartPos);//定位 Bw
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} 'B dZN
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public void run() IE7%u92
{ }71a3EUK
while(nStartPos < nEndPos && !bStop) \ng!qN
{ ~9%L)nC2'
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try{ `@%hz%8Y
URL url = new URL(sURL); "Sm'TZx
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); xNlxi
httpConnection.setRequestProperty("User-Agent","NetFox"); {nvF>
String sProperty = "bytes="+nStartPos+"-"; ctI=|K
httpConnection.setRequestProperty("RANGE",sProperty); \*x'7c/qg
Utility.log(sProperty); rCt8Q&mzf
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InputStream input = httpConnection.getInputStream(); Er /:iO)_
//logResponseHead(httpConnection); :;Z?2P5i
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byte[] b = new byte[1024]; qiEw[3Za]'
int nRead; I'6wh+
while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) Z:>)5Z{'
{ t}FwS6u
nStartPos += fileAccessI.write(b,0,nRead); n
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//if(nThreadID == 1) mhh^kwW
// Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); P/%5J3_,
} yN-o?[o
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Utility.log("Thread " + nThreadID + " is over!"); "[A]tklP
bDownOver = true; ^j~CYzmt
//nPos = fileAccessI.write (b,0,nRead); =CBY_
} MZJ@qIg[Y
catch(Exception e){e.printStackTrace ();} v_U+wga
} i2bkgyzB.
} Xy(8}
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//打印回应的头信息 6:\0=k5
public void logResponseHead(HttpURLConnection con) PB[Y^q
{ a -[:RJW
for(int i=1;;i++) ENoGV;WG
{ -/^a2_d[
String header=con.getHeaderFieldKey(i); [f ._w~
if(header!=null) 3[_zz;Y*d
//responseHeaders.put(header,httpConnection.getHeaderField(header)); HNXMM
Utility.log(header+" : "+con.getHeaderField(header)); LVHIQ9
else <!qN<#$y
break; PMOyZ3
} YCBp]xuE
} {3)^$F=T
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public void splitterStop() oItEGJ|
{ <GdQ""X
bStop = true; %Z.!T
} yj<j>JtN
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} 8PRKS J[@K
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/* BYuoeN!
**FileAccess.java ^RIDC/B=V6
*//文件访问(定位,写) s?Wkh`b
package NetFox; rjaG{ i
import java.io.*; OYYk[r
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public class FileAccessI implements Serializable{ {zNFp#z
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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 Q[6<Y,}(pd
RandomAccessFile oSavedFile;
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long nPos; 7my7|s[
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public FileAccessI() throws IOException cXDG(.!n7B
{ K?J?]VCw
this("",0); f.e4 C,
} }LA7ku
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public FileAccessI(String sName,long nPos) throws IOException &YpWfY&V