/* XAxI?y[c
**SiteFileFetch.java jsi#l
*/ ~K$"PKs3
package NetFox; 7cP[o+
import java.io.*; vJAAAS
import java.net.*; G[<[#$(
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public class SiteFileFetch extends Thread { K-k.=6mS
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SiteInfoBean siteInfoBean = null; //文件信息Bean E(3+o\w
long[] nStartPos; //开始位置 &G|jzXE
long[] nEndPos; //结束位置 YEPG[W<kg
FileSplitterFetch[] fileSplitterFetch; //子线程对象 5OW8G][
long nFileLength; //文件长度 b|8>eY
boolean bFirst = true; //是否第一次取文件 ,#jhKnk2e
boolean bStop = false; //停止标志 +9
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File tmpFile; //文件下载的临时信息 #JR ,C
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DataOutputStream output; //输出到文件的输出流 &c?hJ8"
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//负责整个文件的抓取,控制内部线程(FileSplitterFetch类) q|$>H6H4b
public SiteFileFetch(SiteInfoBean bean) throws IOException W*rU,F|9
{ ,{ L;B
siteInfoBean = bean; f'`nx;@X
//tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); Re,$<9V
tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); s!;VUr\
if(tmpFile.exists ()) pg}+lYGP
{ .UhBvHH
bFirst = false; ZDkD%SCy
read_nPos(); rE{Xo:Cf
} IL[|CB1v
else E%\7Uo-
{ w]Ko/;;^2
nStartPos = new long[bean.getNSplitter()]; 90h1e7ZcC
nEndPos = new long[bean.getNSplitter()]; :_QAjU
} ['Y+z2k
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} +65~,e
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public void run() Bpm5dT;
{ Xlqz8cI
//获得文件长度 eFj6p<
//分割文件 Ad`[Rt']kI
//实例FileSplitterFetch 78a-3){
//启动FileSplitterFetch线程 /@:up+$
//等待子线程返回 nvs}r%1'5
try{ VkTlPmr
if(bFirst) DYT -#Ht
{ aa0`y
nFileLength = getFileSize(); `l gjw=
if(nFileLength == -1) )_c=mT
{ EB29vHAt~
System.err.println("File Length is not known!"); dp[w?AMhM9
} B/sBYVU
else if(nFileLength == -2) [*?_
{ rxy{a
System.err.println("File is not access!"); |:e|~sism
} ^0s\/qyqm
else J%\~<_2ny
{ 16[-3cJ T
for(int i=0;i<nStartPos.length;i++) Oa}V>a
{ \Sw+]pr~
nStartPos = (long)(i*(nFileLength/nStartPos.length)); pe!dm}!h[
} I>kiah*
for(int i=0;i<nEndPos.length-1;i++) .W@(nQ-<
{ m,@1LwBH
nEndPos = nStartPos[i+1]; &weY8\HD
} (
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nEndPos[nEndPos.length-1] = nFileLength; M)`HK
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} U7]<U-.&
} }dd k}wga
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//启动子线程 aW=By)S!Y
fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; J~iOP
for(int i=0;i<nStartPos.length;i++) f
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{ "^9[OgE:
fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), q4Oxs
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), uOG-IHuF
nStartPos,nEndPos,i); l- 1]w$
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Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); FI1THzW4J
fileSplitterFetch.start(); BLL]^qN;Y
} _}I(U?Q-C
// fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), XdGpW
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); pK6e/eC
// Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", /B,:<&_-
nEndPos = " + nFileLength); 2ec$xms
// fileSplitterFetch[nPos.length-1].start(); e}'#Xv
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//等待子线程结束 $5TepH0D
//int count = 0; Pv/Pww\
//是否结束while循环 MvFM,
boolean breakWhile = false; ]a$Wxvgq
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while(!bStop) c Ndw9?Z
{ u\{qH!?t
write_nPos(); {mNdL J
Utility.sleep(500); ; D1FAz
breakWhile = true; 5a'yXB}
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for(int i=0;i<nStartPos.length;i++) g[/^cJHQ
{ 's)fO#
if(!fileSplitterFetch.bDownOver) hlX>K
{ "$GK.MP5
breakWhile = false; {tPnj_|n<
break; Z[Wlyb0
} IuNkfBe4m
} "37*A<+f
if(breakWhile) h~ $&
break; GGH;Z WSe
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//count++; 0z/h+,
//if(count>4) x8Q~VVZr
// siteStop(); NdZ)[f:2
} S#k{e72 *
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System.err.println("文件下载结束!"); 9qEOgJ
} (wife#)~
catch(Exception e){e.printStackTrace ();} ~]&B>q
} V{!lk]p}a
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//获得文件长度 Vn'?3Eb<
public long getFileSize() 6z Ay)~
{ D3y>iQd
int nFileLength = -1; W,Ty=:qm*
try{ r&SO:#rOSM
URL url = new URL(siteInfoBean.getSSiteURL()); )!A 2>
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); Lx%:t YZ
httpConnection.setRequestProperty("User-Agent","NetFox"); HcA[QBh
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int responseCode=httpConnection.getResponseCode(); 5C B%=iL{
if(responseCode>=400) g92dw<$>
{ Hq?& Qo
processErrorCode(responseCode); yxvjg\!&
return -2; //-2 represent access is error PcB{=L
} `NQ{)N0!
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String sHeader; MI\]IQU
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for(int i=1;;i++) ailG./I+
{ P{cos&X|
//DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); .Vmtx
//Utility.log(in.readLine()); eQ<xp A
sHeader=httpConnection.getHeaderFieldKey(i); /ERNS/w
if(sHeader!=null) 3p_b8K_bG
{ Jn*Nao_)
if(sHeader.equals("Content-Length")) uf]Y^,2
{ B9*Sfw%
nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); p.C1 nh
break; jn$j^51`C
} vL$|9|W(
} f>niFPW"
else )|RZa|`-G
break; A*F9\mjI5
} Hd0Xx}3&
} c4 5?St
catch(IOException e){e.printStackTrace ();} @+&'%1
catch(Exception e){e.printStackTrace ();} 2:'lZQ
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Utility.log(nFileLength); O&V[g>x"U
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return nFileLength; TEWAZVE*
} M"(6&M=?
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//保存下载信息(文件指针位置) JYV\oV{
private void write_nPos() v459},!P
{ TatMf;?h&
try{ F;kvH
output = new DataOutputStream(new FileOutputStream(tmpFile)); V#J"c8n
output.writeInt(nStartPos.length); (6R4 \8z2
for(int i=0;i<nStartPos.length;i++) dB3N%pB^
{ nU17L6'$
// output.writeLong(nPos); JZ=5Bpw
output.writeLong(fileSplitterFetch.nStartPos); iBoEZEHjw
output.writeLong(fileSplitterFetch.nEndPos); jdM=SBy7q
} j Nc<~{/
output.close(); 2-mQt_
i
} cPuHLwwYf
catch(IOException e){e.printStackTrace ();} CH;;V3
catch(Exception e){e.printStackTrace ();} 4AHL3@x
} tU:FX[&?R
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//读取保存的下载信息(文件指针位置) 3cC }'j
private void read_nPos() D|Si)_
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{ uyT/Xzo3
try{ >a=d;
DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); *Jt8
int nCount = input.readInt(); &fSTR-8ev#
nStartPos = new long[nCount]; Df@/cT
nEndPos = new long[nCount]; TyOH`5D
for(int i=0;i<nStartPos.length;i++) |scUo~
{ r)b<{u=]
nStartPos = input.readLong(); <&U!N'CE
nEndPos = input.readLong(); JJ5C}`(
} 0JXqhc9'
input.close(); )ooWQ-%P
} D1Yh,P<CF\
catch(IOException e){e.printStackTrace ();} kG^dqqn6
catch(Exception e){e.printStackTrace ();} I=[cZ;t
} #C\4/g?=,
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private void processErrorCode(int nErrorCode) I7mG/
{ 9+Nw/eszO
System.err.println("Error Code : " + nErrorCode); *{5>XH{
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} "^%Z'ou
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s, XM9h>P4
//停止文件下载 5f{|"LG&
public void siteStop() CLN+I'uX0
{ AyTx' u
bStop = true; Z@J.1SaB
for(int i=0;i<nStartPos.length;i++) <4mQ*6
fileSplitterFetch.splitterStop(); DJP6TFT&G
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} *^h_z;{,
} @J vZ[T/
//负责部分文件的抓取 l`gTU?<xd
**FileSplitterFetch.java \9/1L?@
*/ 0ar=cuDm
package NetFox; Kt
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import java.io.*; N5 n>
import java.net.*; /#t&~E_|
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public class FileSplitterFetch extends Thread { 7Dt"]o"+
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String sURL; //File URL zWIeHIt
long nStartPos; //File Snippet Start Position "=|t ~`
long nEndPos; //File Snippet End Position T[.[
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int nThreadID; //Thread's ID QzthTX<
boolean bDownOver = false; //Downing is over .>]N+:O
boolean bStop = false; //Stop identical OVs wt
FileAccessI fileAccessI = null; //File Access interface dZ2`{@AYY
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public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException t(?<#KUB-
{ 7+XM3
this.sURL = sURL; gfo}I2"
this.nStartPos = nStart; p|VcMxT9-
this.nEndPos = nEnd; )5yj/0oT
nThreadID = id; "mZ.V
fileAccessI = new FileAccessI(sName,nStartPos);//定位 G)7)]yBL
} 9
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public void run() 9]$`)wZ
{ Y}.Ystem
while(nStartPos < nEndPos && !bStop) /iC_!n u
{ WE.Tuo5L
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try{ wO!u!I
URL url = new URL(sURL); +1@AGJU3
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); ~_ P YNY`"
httpConnection.setRequestProperty("User-Agent","NetFox"); {ZqQ!!b
String sProperty = "bytes="+nStartPos+"-"; Hj~O49%j&
httpConnection.setRequestProperty("RANGE",sProperty); ?`P2'i<b
Utility.log(sProperty); #T%zfcUj
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InputStream input = httpConnection.getInputStream(); z="L4
//logResponseHead(httpConnection); $D_HZ"ytu
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byte[] b = new byte[1024]; E`)Qs[?Gk
int nRead; dlD}Ub
while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) 7rIlTrG
{ 6k9Lx C:M
nStartPos += fileAccessI.write(b,0,nRead); UqtHxEI%R~
//if(nThreadID == 1) /`+7_=-
// Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); *K)0UKBr
} 4e9E'
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Utility.log("Thread " + nThreadID + " is over!"); zM59UQU;
bDownOver = true; abWl ut
//nPos = fileAccessI.write (b,0,nRead); Sdc*rpH"(
} Yx1 D)
catch(Exception e){e.printStackTrace ();} RvW.@#EH0
} aZgNPw
} )w"0w(
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//打印回应的头信息 ']?=[`#NL
public void logResponseHead(HttpURLConnection con) Y6VQ:glDT-
{ \cZfg%PN
for(int i=1;;i++) 8p=>?wG
{ iz`jDa Q|1
String header=con.getHeaderFieldKey(i); V^En8
if(header!=null) cU+>|'f&
//responseHeaders.put(header,httpConnection.getHeaderField(header)); d8:C3R
Utility.log(header+" : "+con.getHeaderField(header)); Bp3L>AcVu
else SDc"
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break; &=zU611,
} sXB+s
} 3w'W~
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public void splitterStop() i<iXHBs
{ ou6j*eSN
bStop = true; [g|Hj)(
} v@_in(dk
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} AZwa4n}"
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/* Cef7+fa
**FileAccess.java z%};X$V`J
*//文件访问(定位,写) EcW1;wH
package NetFox; *V|zx#RN
import java.io.*; p7UTqKi
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public class FileAccessI implements Serializable{ t w!.%_1^
:t>Q:mX(N
//RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 }17bV, t
RandomAccessFile oSavedFile; m!Af LSlwm
long nPos; /*P7<5n0
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public FileAccessI() throws IOException GP]TnQ<*;
{ o+^Eu}[.
this("",0); vYzVY\
} `M rBav
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public FileAccessI(String sName,long nPos) throws IOException A&
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{ stXda@y<p
oSavedFile = new RandomAccessFile(sName,"rw"); o<J5!
this.nPos = nPos; [&daG