/* xaQO=[
**SiteFileFetch.java [wHGt?R
*/ [T|_J$
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package NetFox; #^|"dIZ_M
import java.io.*; @)"= b!q=
import java.net.*; tGq0f"}'J
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public class SiteFileFetch extends Thread { l_ Eeus
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SiteInfoBean siteInfoBean = null; //文件信息Bean -M{.KqyW
long[] nStartPos; //开始位置 ,OGXH2!h
long[] nEndPos; //结束位置 14U:.Q
FileSplitterFetch[] fileSplitterFetch; //子线程对象 ;"gUrcuY
long nFileLength; //文件长度 3<c_`BWu
boolean bFirst = true; //是否第一次取文件 V4~`yT?*"
boolean bStop = false; //停止标志 Ft} h&aYP
File tmpFile; //文件下载的临时信息 ?H7Ym N
DataOutputStream output; //输出到文件的输出流 tv,Z>&OM
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//负责整个文件的抓取,控制内部线程(FileSplitterFetch类) mpcO-%a
public SiteFileFetch(SiteInfoBean bean) throws IOException 6;JlA})
{ '
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siteInfoBean = bean; #`kLU:
//tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); J 'qhY'te
tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); 'aLTiF+
if(tmpFile.exists ()) luPj'd?
{ 1$A7BP
bFirst = false; ;ty08D/
read_nPos(); o8Q+hZB}A
} 6qAs$[
else hXF#KVqx
{ i'6>_,\(
nStartPos = new long[bean.getNSplitter()]; *=b#>//
nEndPos = new long[bean.getNSplitter()]; JZc"4qf@OT
} ,m"0Bu2
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} pb`!_GmB
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public void run() ZJZKCdT@
{ 7QnQ=gu
//获得文件长度 bOvMXj/HV=
//分割文件 C VyYV &U,
//实例FileSplitterFetch EKr#i}(x<
//启动FileSplitterFetch线程
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//等待子线程返回 !}+rg2
try{ udld[f.
if(bFirst) 5:T)hoF@
{ W)OoHpdw
nFileLength = getFileSize(); GM{J3O=
if(nFileLength == -1) Ho_ 2zx:8b
{ +DpiX&^h
System.err.println("File Length is not known!"); @ xBw'
} D=!e6E<>@
else if(nFileLength == -2) OS.oknzZZ
{ 3lW7auH4Y{
System.err.println("File is not access!"); @a[Y[FS
} 0/g 0=dW=
else qRX:eo
{ #("/ 1N6
for(int i=0;i<nStartPos.length;i++) XZ3)gYQi
{ p%?VW
nStartPos = (long)(i*(nFileLength/nStartPos.length)); Q^Lk^PP7
} ~8htg8CZ`
for(int i=0;i<nEndPos.length-1;i++) sz?/4tY
{
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nEndPos = nStartPos[i+1]; ~A X@o-WU
} Z(gW(O9h.V
nEndPos[nEndPos.length-1] = nFileLength; 5Vj t!%?r
} ?F!='6D}b
} uy
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//启动子线程 ar!`8"
fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; r^jiK\*
for(int i=0;i<nStartPos.length;i++) <hvVh9
{ J8>8@m6
fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), hM/:zC:
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), BB)(#yoi
nStartPos,nEndPos,i); |+|q`SwJ
Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); AfV
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fileSplitterFetch.start(); BPH-g\q
} <,Z6=M`
// fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), @h91: hb
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); P_:~!+W,
// Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", ([+u U!
nEndPos = " + nFileLength); -wi zUp
// fileSplitterFetch[nPos.length-1].start(); .8I\=+Zi
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//等待子线程结束 o;#9$j7QP!
//int count = 0; Te :4z@?
//是否结束while循环 !}[,ODJ4 d
boolean breakWhile = false; q!sazVaDp
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while(!bStop) xKZLXQ'e-
{ 7[)IP:I>
write_nPos(); ap7ZT7KW
Utility.sleep(500); "B^c
breakWhile = true; i- v PJg1
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for(int i=0;i<nStartPos.length;i++) ;#goC N.
{ t[yu3U
if(!fileSplitterFetch.bDownOver) YVpsf8R
{ @'Y^A
breakWhile = false; `wzb}"gLsM
break; 5R?[My
} |IL/F]I
} 9 K.B
if(breakWhile) YH
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break; hyPVt6Gkj
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//count++; zK5/0zMZ
//if(count>4) bJ$6[H-:
// siteStop(); 9MI~yIt`L
} a(qij&>
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System.err.println("文件下载结束!"); m4=[e!
} |6ZH+6[
catch(Exception e){e.printStackTrace ();} Xqz\%&G
} AxsTB9/
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//获得文件长度 rQuozbBb
public long getFileSize() Q^|ZoJS
{ !sJ*0
int nFileLength = -1; Rfk8trD B
try{ L355uaj
URL url = new URL(siteInfoBean.getSSiteURL());
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HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); $CXMeY{tOo
httpConnection.setRequestProperty("User-Agent","NetFox"); q$<M2
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int responseCode=httpConnection.getResponseCode(); b%TS37`^[
if(responseCode>=400) whA
{ ;VLv2J*
processErrorCode(responseCode); 0# )I:5
return -2; //-2 represent access is error kzK4i!}
} Dm")\"5\?
us_o{
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String sHeader; l$1z%|I
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for(int i=1;;i++) n'
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{ BkH- d z
//DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); YV6@SXy
//Utility.log(in.readLine()); |9Gng`)
sHeader=httpConnection.getHeaderFieldKey(i); z)Yk&;XC
if(sHeader!=null) w`N|e0G@
{ /9K,W)h_
if(sHeader.equals("Content-Length")) (Ov{gj^
{ H(JgqbFB*
nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); tfSY(cXg'T
break; >I~$h,
} WeqE9@V
} uA'S8b%C
else &pL.hM^
break; WT-BHB1
} DaA9fJ7a
} \hm;p
catch(IOException e){e.printStackTrace ();} Rr9K1io$)
catch(Exception e){e.printStackTrace ();} 015
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Utility.log(nFileLength); :jJ;&t^^
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return nFileLength; ;2NJkn9t
} MHuQGc"e+4
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//保存下载信息(文件指针位置) MRI`h.
private void write_nPos() :RxWHh3O
{ }!&Vc f
try{ V!|:rwG2
output = new DataOutputStream(new FileOutputStream(tmpFile)); w$D&LA}(M
output.writeInt(nStartPos.length); y1oQ4|KSI
for(int i=0;i<nStartPos.length;i++) L.E6~Rv
{ y7x&/2
// output.writeLong(nPos); H*gX90{!2
output.writeLong(fileSplitterFetch.nStartPos); 6t,_Xqg*
output.writeLong(fileSplitterFetch.nEndPos); DE $HF*WY
} 5t,W'a_
output.close(); LU=<?"N6
} LNA5!E
catch(IOException e){e.printStackTrace ();} V5.=08L
catch(Exception e){e.printStackTrace ();} \8KAK3i'
} g }%$VUSA
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//读取保存的下载信息(文件指针位置) "-WEUz
private void read_nPos() %u)niY-g
{ !"G|y4O
try{ cLZaQsS%
DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); ,>AA2@6zMT
int nCount = input.readInt(); N084k}io
nStartPos = new long[nCount]; "1-gMob
nEndPos = new long[nCount]; "8NhrUX
for(int i=0;i<nStartPos.length;i++) +(pFU\&U3H
{ Z [aKic
nStartPos = input.readLong(); 1 m>x5Dbk!
nEndPos = input.readLong(); 4U;Zs3
} |e]2 >NjQa
input.close(); ?}n\&|+
} ~8j4IO(
catch(IOException e){e.printStackTrace ();} k;fy8
catch(Exception e){e.printStackTrace ();} 8+?|4'\`
} L]syDn
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private void processErrorCode(int nErrorCode) KysJ3G.k\
{ k>'c4ay290
System.err.println("Error Code : " + nErrorCode); |)4aIa
} }(yX$ 3?`
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//停止文件下载 m|c5X)}-
public void siteStop() u> @Yoyc
{ ;;Y>7Kn!u
bStop = true; =8p *Ijs
for(int i=0;i<nStartPos.length;i++) 6]mFw{6qn1
fileSplitterFetch.splitterStop(); JtB]EvpL}
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} U.kTdNSp
} v=Y)
A ?
//负责部分文件的抓取 |_H{B+.
**FileSplitterFetch.java m0a <~
*/ #K4lnC2qz
package NetFox; oE;SZ"$x
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import java.io.*; - /
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import java.net.*; Z'V"nhL
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public class FileSplitterFetch extends Thread { h=7eOK]
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String sURL; //File URL s7(I
long nStartPos; //File Snippet Start Position 8YLS/dN0 w
long nEndPos; //File Snippet End Position <:YD.zAh|
int nThreadID; //Thread's ID _]/&NSk
boolean bDownOver = false; //Downing is over @8$3Q,fF(
boolean bStop = false; //Stop identical ;/-X;!a>
FileAccessI fileAccessI = null; //File Access interface h{BO\^6x
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public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException b- FJMY
{ Qk_Mx"
this.sURL = sURL; n#fc=L1U
this.nStartPos = nStart; U*R
this.nEndPos = nEnd; ZBf9Upg
nThreadID = id; !J%m 7A
fileAccessI = new FileAccessI(sName,nStartPos);//定位 n~e#Y<IP\1
} d$O)k+j
}8\"oA6
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public void run() C\d5t4s
{ \~{b;$N}
while(nStartPos < nEndPos && !bStop) h5>38Kd
{ ,TdL-a5
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try{ 9>1
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URL url = new URL(sURL); Ts~)0
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); ,2y" \_
httpConnection.setRequestProperty("User-Agent","NetFox"); 9tZ+?O5
String sProperty = "bytes="+nStartPos+"-"; Hc"FW5R
httpConnection.setRequestProperty("RANGE",sProperty); (9X>E+0E
Utility.log(sProperty); KDmzKOl
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InputStream input = httpConnection.getInputStream(); ^ 1 P@BRh
//logResponseHead(httpConnection); q&y9(ZvI
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byte[] b = new byte[1024]; hG3p"_L
int nRead; #ivN-WKCl
while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) HxXCxI3
{ ncy? w
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nStartPos += fileAccessI.write(b,0,nRead); _?IP}} jA:
//if(nThreadID == 1) C6neZng
// Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); g\n0v~T+
} 5{@Hpj/B
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Utility.log("Thread " + nThreadID + " is over!"); #P''+$5,
bDownOver = true; Oy `2ccQ#
//nPos = fileAccessI.write (b,0,nRead); yN Bb(!u
} 1D pRm(
catch(Exception e){e.printStackTrace ();} t ;~H6
} k\J 6WT
} \1p_6U7
;J)8#|
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//打印回应的头信息 D#~S<>u@
public void logResponseHead(HttpURLConnection con) I}@m6D|\
{ c_33.i"I}
for(int i=1;;i++) \~YyY'J
{ @fVCGV?'
String header=con.getHeaderFieldKey(i); LE"t'R
if(header!=null) o5 fXe}pl@
//responseHeaders.put(header,httpConnection.getHeaderField(header)); J:c]z9&!
Utility.log(header+" : "+con.getHeaderField(header)); \AT]$`8@_
else VgSk\:t
break; V=C@ocyZ
} #78P_{#!
} >^ E
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public void splitterStop() (;11xu
{ .skR4f,h
bStop = true; :IZ(9=hs
} dX58nJ4u
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} B3P#p^
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/* UI*^$7z1 +
**FileAccess.java mh#dnxeR
*//文件访问(定位,写) Z(8'ki
package NetFox; G$5N8k[2
import java.io.*; f|*vWHSM
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public class FileAccessI implements Serializable{ oH/4opV
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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 $Yr'`(Cbc
RandomAccessFile oSavedFile; yW$ja|^E
long nPos; r~sx]=/
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public FileAccessI() throws IOException Q}J'S5%
{ U#O6l-xe]
this("",0); _u`NIpXSP
}
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public FileAccessI(String sName,long nPos) throws IOException ~h~K"GbC?
{ H<M
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oSavedFile = new RandomAccessFile(sName,"rw"); -$(,&qyk
this.nPos = nPos; K)Nbl^6x
oSavedFile.seek(nPos); i>9/vwe
} uA?_\z?
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public synchronized int write(byte[] b,int nStart,int nLen) }57wE$9K
{ t5z6{`
int n = -1; T,72I
try{ Jlw
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oSavedFile.write(b,nStart,nLen); <}RU37,W
n = nLen; -R,[/7zj
} 2&E1) ^
catch(IOException e) 1NO<K`
{ *v'&i) J
e.printStackTrace ();
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} Gd)@PWK
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return n; IKM=Q.
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} ]@o p
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} v7O&9a;
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/* J{=by]-rD,
**SiteInfoBean.java br"p D-}
*/ tvptawA.
package NetFox; ,cs`6Bd4
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Cw]Q)rX{
public class SiteInfoBean { fmH$1C<
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private String sSiteURL; //Site's URL 2.Ym
private String sFilePath; //Saved File's Path xtKWh`[&
private String sFileName; //Saved File's Name 4J2NIFZ
private int nSplitter; //Count of Splited Downloading File $Q1:>i@I|g
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public SiteInfoBean() w,]cFT
{//nSplitter的缺省值为5 h\KQ{-Bl
//default value of nSplitter is 5 ;$(a+?
this("","","",5); i\G@ kJNnF
} ^;GJ7y&,d
in -/
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public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) e J>(SkR:[
{ ghJ81
sSiteURL= sURL; >t u3m2
sFilePath = sPath; RX:\@c&
sFileName = sName; Ul OoMGg
this.nSplitter = nSpiltter; l%lkDh!$"
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} noa?p&Y1m
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public String getSSiteURL() It!%/Y5
{ {hK$6bD3^
return sSiteURL; `N}<lg(0#
} ?)-*&1cv
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public void setSSiteURL(String value) JAen=%2b
{ Fs<kMT
sSiteURL = value; Bm"jf]
} k&ujr:)5Y5
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public String getSFilePath() d~uK/R-KD
{ e`'O!
return sFilePath; 4VSIE"8e
} {w}PV5<
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public void setSFilePath(String value) w<&Nn`V
{ `,Q
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sFilePath = value; 3>yb$ZU"-
} c'&