/* dl6d!Nz*
**SiteFileFetch.java JD^(L~ n]
*/ CZS{^6Ye
package NetFox; )K4 |-<i
import java.io.*; w<|^i*
import java.net.*; ?A3pXa
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public class SiteFileFetch extends Thread { _}vD?/$L
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SiteInfoBean siteInfoBean = null; //文件信息Bean _iO,GT=J-
long[] nStartPos; //开始位置 =P<gZ-Cm
long[] nEndPos; //结束位置 Wt"fn&R}
FileSplitterFetch[] fileSplitterFetch; //子线程对象 :CNHN2 J
long nFileLength; //文件长度 a<B[~J 4i
boolean bFirst = true; //是否第一次取文件 X@*$3z#Z
boolean bStop = false; //停止标志 5P,{h
File tmpFile; //文件下载的临时信息 l(-6pP5`
DataOutputStream output; //输出到文件的输出流 .:B]
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//负责整个文件的抓取,控制内部线程(FileSplitterFetch类) \`Db|D?oy
public SiteFileFetch(SiteInfoBean bean) throws IOException ?a+tL'D[
{ &~29 %Ns
siteInfoBean = bean; *Sm$FMWQ
//tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); FYFP6ti
tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); \H!ECTI
if(tmpFile.exists ()) hyH "
{ n\Uh5P1W"
bFirst = false; %fGS< W;
read_nPos(); R+
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} ZqsI\"bj
else CLg;
{ >?ZH[A
nStartPos = new long[bean.getNSplitter()]; h3$.`
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nEndPos = new long[bean.getNSplitter()]; U
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} : |#Iw
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} UN>!#Ji:$
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public void run() 4&~ft
{ 0K <@?cI
//获得文件长度 ? "]fGp6y
//分割文件 Jtnuo]{R
//实例FileSplitterFetch Uc/MPCqZ
//启动FileSplitterFetch线程 'j6PL;~c
//等待子线程返回 ?g+0S@{i $
try{ 8l-+
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if(bFirst) j(HC^\Hi
{ (D]l/akP
nFileLength = getFileSize(); Q/o!&&
if(nFileLength == -1) Z"<aS&GH
{ kz\
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System.err.println("File Length is not known!"); j(F&*aH78
} DBANq\
else if(nFileLength == -2) 9->E$W
{ ;Oh4W<hH}
System.err.println("File is not access!"); <i``#"/
} 3P-qLbJ
else ]1>U@oK
{ :A%uXgK<k
for(int i=0;i<nStartPos.length;i++) TBHIcX
{ eN fo8xUG
nStartPos = (long)(i*(nFileLength/nStartPos.length)); b*S:wfw
} ,'?%z>RZm
for(int i=0;i<nEndPos.length-1;i++) 7^P!@o$v!
{
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nEndPos = nStartPos[i+1]; >Ip>x!wi
} Qctm"g|
nEndPos[nEndPos.length-1] = nFileLength; =|O`al
} `X'-4/Y
} !Sx}~XB<
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//启动子线程 S^?
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fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; ?}\aG3_4
for(int i=0;i<nStartPos.length;i++) |q"WJQ
{ /bv`_>
fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), -H5n>j0!{
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), Wu(6FQ`H
nStartPos,nEndPos,i); -&I%=0q
Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); w-*$gk]
fileSplitterFetch.start(); ^UHt1[
} *9M 5'
// fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), 'L4@|c~x
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); 9`yG[OA
// Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", i,=greA]"
nEndPos = " + nFileLength); x a#0y
// fileSplitterFetch[nPos.length-1].start(); ;A7HEx
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//等待子线程结束 Y0fX\6=h
//int count = 0; xZZW*d_b
//是否结束while循环 Is&z~Xy/
boolean breakWhile = false; ES p)%
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while(!bStop) ,R]hNjs-{
{ S G|``}OA
write_nPos(); Tu2BQ4\[
Utility.sleep(500); Fn.wd`'0
breakWhile = true; E,&BP$B
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for(int i=0;i<nStartPos.length;i++) Y+75}]B
{ DP **pf%j
if(!fileSplitterFetch.bDownOver) YzJ\< tkp
{ _Bm/v^(
breakWhile = false; N+%E=D>
break; :=WiT_M
} RO"c+|Py
} E:/G!1
if(breakWhile) :bFCnV`Q
break; 3qU#Rg
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//count++; ]4wyuP,up
//if(count>4) >F+Mu-^
// siteStop(); 8##-fv]
} I)Y ^_&=
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System.err.println("文件下载结束!"); 9,wd,,ta
} n*~=O '
catch(Exception e){e.printStackTrace ();} F`KA^ZI
} ,DsqKXSU
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//获得文件长度 +ptVAg+
public long getFileSize() 3;(;'5|Z
{ ?n<b:oO
int nFileLength = -1; I:l<t*
try{ 2 Pn
URL url = new URL(siteInfoBean.getSSiteURL()); /T&z
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HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); TD:NL4dm
httpConnection.setRequestProperty("User-Agent","NetFox"); l]D?S]{a
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int responseCode=httpConnection.getResponseCode(); / 4{6`
if(responseCode>=400) 'X&sH/>r
{ ov&4&v
processErrorCode(responseCode); cr Hd$~q,
return -2; //-2 represent access is error o&}!bq]
} dx}) 1%
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String sHeader; F0h`>{1%
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for(int i=1;;i++) oe,I vnt
{ `t_S uZ`V
//DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); zvv<w@rX
//Utility.log(in.readLine()); jf25Ky~
sHeader=httpConnection.getHeaderFieldKey(i); ]G.ttfC
if(sHeader!=null) SXkUtY$
{ 1vKc>+9
if(sHeader.equals("Content-Length")) (n:d
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{ _Kdqa%L
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nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); (XW\4msB)I
break; 6d/;GyG
} AuIb>@a
} 3\_ae2GW
else T(t@[U2^
break; kSx^Uu*
} 7x`dEi<
} T\7z87Q
catch(IOException e){e.printStackTrace ();} w@w(AFV9/
catch(Exception e){e.printStackTrace ();} i}teY{pyc
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Utility.log(nFileLength); v5STe`
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return nFileLength; mLApF5Hy
} LVNq@,s
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//保存下载信息(文件指针位置) &4 Py
private void write_nPos() / blVm1F
{ YjaEKM8*
try{ R
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output = new DataOutputStream(new FileOutputStream(tmpFile)); r}kQ<SRx
output.writeInt(nStartPos.length); xCU^4DO3p
for(int i=0;i<nStartPos.length;i++) q =sEtH=
{ Qvc "?yx8}
// output.writeLong(nPos); K;,zE6WD$$
output.writeLong(fileSplitterFetch.nStartPos); lbM)U
output.writeLong(fileSplitterFetch.nEndPos); A[lbBR
} d%1Tv1={
output.close(); ~uy{6U{&I
} [vM ksHk4
catch(IOException e){e.printStackTrace ();} xs+pCK |
catch(Exception e){e.printStackTrace ();} 0/{$5gy&
} .B2?%2S
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//读取保存的下载信息(文件指针位置) +M4X
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private void read_nPos() '
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{ {
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try{ }diB
DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); n0|oV(0FE
int nCount = input.readInt(); \Tf[% Kt x
nStartPos = new long[nCount]; ~)>O=nR
nEndPos = new long[nCount]; fik*-$V`
for(int i=0;i<nStartPos.length;i++) GIXxOea1
{ 1k-YeQNe
nStartPos = input.readLong(); VB
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nEndPos = input.readLong(); Yq~$Q4
} j8Nl'"
input.close(); wz1fx>Q
} `/ ]Th&(5
catch(IOException e){e.printStackTrace ();} #p'Xq
}]
catch(Exception e){e.printStackTrace ();} * V;L|c
} oU/CXz?H
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private void processErrorCode(int nErrorCode) YrlOvXW
{ "^sh:{
System.err.println("Error Code : " + nErrorCode); 6z;C~_BV
} u!kC+0Y
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//停止文件下载 5=<
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public void siteStop() @9-/p^n1
{ h SGI
bStop = true; ]O%wZIp\P
for(int i=0;i<nStartPos.length;i++) PL+r*M%ll
fileSplitterFetch.splitterStop(); 9A|deETa-
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} WhPwD6l>
} 3FWl_d~uD
//负责部分文件的抓取 sEBZ-qql
**FileSplitterFetch.java /u
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*/ uu08q<B5b)
package NetFox; tE&@U$0>o
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import java.io.*; w[`2t{^j
import java.net.*; Po+I!TL'
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public class FileSplitterFetch extends Thread { i%~^3/K
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String sURL; //File URL n*%o!=
long nStartPos; //File Snippet Start Position }^T7S2_Qy
long nEndPos; //File Snippet End Position Zp5;=8wa;
int nThreadID; //Thread's ID eN*=wOh
boolean bDownOver = false; //Downing is over NBLiwL37{
boolean bStop = false; //Stop identical 8:W,""
FileAccessI fileAccessI = null; //File Access interface ;ZnSWIF2
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public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException 4k}3^.#
{ )-2sk@y
this.sURL = sURL; .I~#o$6
this.nStartPos = nStart; ZkbaUIQ
this.nEndPos = nEnd; [V vTR#^
nThreadID = id; $e(]L(o;
fileAccessI = new FileAccessI(sName,nStartPos);//定位 jg2UX
} &/%A 9R,
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public void run() xZmO^F5KHj
{ x3./
while(nStartPos < nEndPos && !bStop) Cxn<#Kf\-<
{ FG-v71!h#
q_0So}
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try{ YH_mWN\Wu
URL url = new URL(sURL); |r5e#3w
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); kNC.^8ryz[
httpConnection.setRequestProperty("User-Agent","NetFox"); d!BQ%a
String sProperty = "bytes="+nStartPos+"-"; .Vohd@s9l
httpConnection.setRequestProperty("RANGE",sProperty); "nkj_pC
Utility.log(sProperty); 0D x,)C
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InputStream input = httpConnection.getInputStream(); j41)X'MgJ
//logResponseHead(httpConnection); {zTo[i
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byte[] b = new byte[1024]; ld RV
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int nRead; J[Ckz]
while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) [
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{ +[LG>
nStartPos += fileAccessI.write(b,0,nRead); Vrwy+o>:X
//if(nThreadID == 1) -4rXOmiA
// Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); :v=^-&t
} n*'i{P]
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Utility.log("Thread " + nThreadID + " is over!"); @D?KS;#
bDownOver = true; =r w60B
//nPos = fileAccessI.write (b,0,nRead); E_fH,YJ?9
} |E%i
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catch(Exception e){e.printStackTrace ();} x,U'!F
} 0_!')+
} (d>
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//打印回应的头信息 8R3x74fL
public void logResponseHead(HttpURLConnection con) kIC$ai6.
{ O\3
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for(int i=1;;i++) |4$.mb.
{ 8OS@gpz
String header=con.getHeaderFieldKey(i); ,M4G_U[
if(header!=null) lpjeEawo4
//responseHeaders.put(header,httpConnection.getHeaderField(header)); Ri<7!Y?l
Utility.log(header+" : "+con.getHeaderField(header)); fX
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else .Yw
break; }9Th`
} iMT[sb
} "aU)
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public void splitterStop() `u<\
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{ G_vcuCHm
bStop = true; @3^D[
} ?%|w?Fdx-
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} 9\QeH'A
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/* e9LP!"@EY
**FileAccess.java S'%|40U
*//文件访问(定位,写) -qbx:Kk(
package NetFox; F
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import java.io.*; v>XAzA
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public class FileAccessI implements Serializable{ pmWt7 }
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//RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 9}[UZN6
RandomAccessFile oSavedFile; tj'xjX
long nPos; VRb+-T7"
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public FileAccessI() throws IOException R&-Vm3mc3
{ &x":
this("",0); ?Z0NHy;5
} \80W?9qj
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public FileAccessI(String sName,long nPos) throws IOException #JAy
{ wHT]&fZ
oSavedFile = new RandomAccessFile(sName,"rw"); {4y#+[
this.nPos = nPos; ?W3l
oSavedFile.seek(nPos); #VvU8"u
} } SNZl`>
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public synchronized int write(byte[] b,int nStart,int nLen) 9hTzi+'S
{ Z!& u_
int n = -1; /<R[X>]<F
try{ mA?fCs
oSavedFile.write(b,nStart,nLen); 8|"26UwD/
n = nLen; t=;P1d?E;
} 1_jd1UT
catch(IOException e) NimW=X;c
{ G<$N*3
e.printStackTrace (); {f(RY j
} .eHOG]H
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return n; J#*%r)
} <2V:tj)?P
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} 2.2G79U,
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/* Q1'4xWu
**SiteInfoBean.java W^k|*Y|
*/ *}P=7TuS
package NetFox; 3F gTM(
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public class SiteInfoBean { JQ%D6b
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private String sSiteURL; //Site's URL lDX\"Fq
private String sFilePath; //Saved File's Path _/5#A+ ?
private String sFileName; //Saved File's Name SjL&\),
private int nSplitter; //Count of Splited Downloading File ?/1Eu47
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public SiteInfoBean() | zyO;
{//nSplitter的缺省值为5 vve L|j
//default value of nSplitter is 5 nJhaI
this("","","",5); (3Dz'X
} o()No_.8H
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public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) Fz {T;
{ i}gsxq%
sSiteURL= sURL; 'Z8=y[l
sFilePath = sPath; #8/pYQ;
sFileName = sName; V^%P}RFMc
this.nSplitter = nSpiltter; 7t3ps
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} \(&UDG$
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public String getSSiteURL() G -V~6
{ va[r~
return sSiteURL; T&nIH[}v
} ".7\>8A#a
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public void setSSiteURL(String value) ?`/DFI'_G
{ &e\UlM22
sSiteURL = value; X.GK5Phd
} uZml.#@4
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public String getSFilePath() E*"oA1/I
{ >/+R~ n
return sFilePath; 6hiWgbE
} 1d 1
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public void setSFilePath(String value) mMw--Gc?
{ ECk*
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sFilePath = value; #Dp]S,e
} K"jS,a?s 6
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public String getSFileName() uE,g|51H/
{ |c[= V?AC
return sFileName; )?{jD
} `hf`lq^
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public void setSFileName(String value) -<l2 $&KS
{ Wi@YJ
sFileName = value; oV'G67 W
} I+/fX0-Lib
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public int getNSplitter() 9~{,Hj1xE
{ zG)vmysJf
return nSplitter; aen0XiB6~^
} l kW5<s_
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