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**SiteFileFetch.java A4C+5R
*/ t.T
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package NetFox; a"N4~?US
import java.io.*; Y;4!i?el
import java.net.*; ldha|s.*
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public class SiteFileFetch extends Thread { te|?)j
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SiteInfoBean siteInfoBean = null; //文件信息Bean N;Dp~(1
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long[] nStartPos; //开始位置 %nN `|\
long[] nEndPos; //结束位置 (*}yjUYLZ
FileSplitterFetch[] fileSplitterFetch; //子线程对象 7ELMd{CD
long nFileLength; //文件长度 ^d}gpin
boolean bFirst = true; //是否第一次取文件 !oPq?lW9
boolean bStop = false; //停止标志 X cr
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File tmpFile; //文件下载的临时信息 z>sbr<doa
DataOutputStream output; //输出到文件的输出流 >~%e$a7}+
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//负责整个文件的抓取,控制内部线程(FileSplitterFetch类) **9x?s
public SiteFileFetch(SiteInfoBean bean) throws IOException L86n}+
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{ :B3[:MpL}
siteInfoBean = bean; Q!-
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//tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); lC:k7<0Ji
tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); --;@2:lg{
if(tmpFile.exists ()) C~fjWz' V
{ hfpJ+[
bFirst = false; Xq'cA9v=$J
read_nPos(); !cKz7?w
} ?
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else SJD@&m%?[
{ 4tL<q_
nStartPos = new long[bean.getNSplitter()]; 5T sU Qc
nEndPos = new long[bean.getNSplitter()]; BA\/YW @
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} (c0A.L)
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public void run() dJ$"l|$$
{ fXrXV~'8
//获得文件长度 d%l{V6
//分割文件 ^u3V
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//实例FileSplitterFetch f0Bto/,>~
//启动FileSplitterFetch线程 oIUy -|
//等待子线程返回 U(~+o
try{ 74!oe u.>
if(bFirst) 8r3A~
{
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nFileLength = getFileSize(); Ol4+_n8xj
if(nFileLength == -1) 2WUT/{:X
{ Uj&W<'I
System.err.println("File Length is not known!"); ]HpA5q1ck
} ~?B;!Csk
else if(nFileLength == -2) j
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{ (sVi\R
System.err.println("File is not access!"); nUkaz*4qU
} f~ }H
else !i=nSqW
{ 9UvXC)R1
for(int i=0;i<nStartPos.length;i++) >2#8B
{ ^CwR!I.D}4
nStartPos = (long)(i*(nFileLength/nStartPos.length)); wAnb
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} !w&kyW?e
for(int i=0;i<nEndPos.length-1;i++) 2^?:&1:
{ apE
nEndPos = nStartPos[i+1]; n3J53| %v
} C6rg<tCH
nEndPos[nEndPos.length-1] = nFileLength; NcY608C
} B"%{i-v>**
} @?h/B=56
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//启动子线程 0uBl>A7qhn
fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; 2NB L}x
for(int i=0;i<nStartPos.length;i++) i<pk6rO1
{ )BRKZQN
fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), eh"3NRrN
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), |_uaS
nStartPos,nEndPos,i); *)+ut(x|#
Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); Z@hD(MS(C
fileSplitterFetch.start(); z=$jGL
} 7FRmx4(!
// fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), IIq1\khh
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); ;5@ t[r
// Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", &+G"k~%
nEndPos = " + nFileLength); {rcnM7 S1L
// fileSplitterFetch[nPos.length-1].start(); =y=cW1TG
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//等待子线程结束 ~axjjv
//int count = 0; z0/}
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//是否结束while循环 ^e+a
boolean breakWhile = false; >[X{LI(_<<
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while(!bStop) "s\L~R.&
{ 41fJ%f`
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write_nPos(); !t i6
Utility.sleep(500); (%`QhH
breakWhile = true; k__$Q9qj(
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for(int i=0;i<nStartPos.length;i++) qc-mGmom L
{ @)K%2Y`
if(!fileSplitterFetch.bDownOver) M,ir`"s
{ C:G8c[
breakWhile = false; -,["c9'3
break; Iy }:F8F>g
} 8uA,iYD
} ]THPSw_y8
if(breakWhile) Z{H5oUk
break; bGorH=pb5R
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//count++; 8XsguC
//if(count>4) f3UXCp
// siteStop(); *3D%<kVl
} RxQh2<?
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System.err.println("文件下载结束!"); `%j~|i)4
} S(7ro]U9
catch(Exception e){e.printStackTrace ();} . BiCBp<
} Ux+Q
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//获得文件长度 T6~_Q}6
public long getFileSize() JAI)Eqqv]
{ 'TAUE{{
int nFileLength = -1; S/ibb&
try{ M?;y\vS?.
URL url = new URL(siteInfoBean.getSSiteURL()); +&["HoKg}&
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); ~@kU3ZGJZ
httpConnection.setRequestProperty("User-Agent","NetFox"); [xKd7"d/n
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int responseCode=httpConnection.getResponseCode();
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if(responseCode>=400) \o';"Q1H
{ hI( SOsKs
processErrorCode(responseCode); M'!U<Y
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return -2; //-2 represent access is error Y F*OU"2U
} ^gFqRbuS
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String sHeader; y_.!!@,
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for(int i=1;;i++) ){Ob,LEU&
{ @9&P~mo/
//DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); Y \:0Ev
//Utility.log(in.readLine()); SI8%M=P>
sHeader=httpConnection.getHeaderFieldKey(i); gsn)Wv$h
if(sHeader!=null) WAn'kA
{ |c`w'W?C6
if(sHeader.equals("Content-Length")) n-TQ*&h]3S
{ ;.bm6(;
nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); lvp8z)G
break; =V^.}WtO
} K!KMQr`
} n!qV> k9Y
else \.g\Zib )
break; @UdfAyL
} lqb/eN9(t
} sUYxT>R
catch(IOException e){e.printStackTrace ();} ,<2DLp%%D
catch(Exception e){e.printStackTrace ();} w/L `
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Utility.log(nFileLength); o`.R!wm:W
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return nFileLength; i9=&;_z
} $O^v]>h
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//保存下载信息(文件指针位置) ti &J
private void write_nPos() q5L51KP2
{ 5?Wto4j
try{ gI8Bx ]
output = new DataOutputStream(new FileOutputStream(tmpFile)); TYA~#3G)
output.writeInt(nStartPos.length); lKgKtQpi
for(int i=0;i<nStartPos.length;i++) ~l2aNVv;
{ LF0sH)e]
// output.writeLong(nPos); WlYs~(=9
output.writeLong(fileSplitterFetch.nStartPos); >YUoh-]`
output.writeLong(fileSplitterFetch.nEndPos); rhL" i^
} ]
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output.close(); M,5"b+mX[~
} sZLT<6_B
catch(IOException e){e.printStackTrace ();} ?,yj")+
catch(Exception e){e.printStackTrace ();} .Udj@{
} VS&TA>
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//读取保存的下载信息(文件指针位置) WYc7aciJ
private void read_nPos() d`1I".y
{ b]a@
try{ 6 K-5g/hL
DataInputStream input = new DataInputStream(new FileInputStream(tmpFile));
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int nCount = input.readInt(); jg&E94}+
nStartPos = new long[nCount]; c`fG1s
nEndPos = new long[nCount]; ",)Qc!^P$
for(int i=0;i<nStartPos.length;i++) aTzjm`F0
{ hkOsm6
nStartPos = input.readLong(); jP~Z`yf
nEndPos = input.readLong(); 4Bl{WyMJ |
} 1bw{q.cmD
input.close(); P4T h_B7
} C.kxQ<
catch(IOException e){e.printStackTrace ();} ~n/
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catch(Exception e){e.printStackTrace ();} *SO{\bu
} `EtS!zD~b
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private void processErrorCode(int nErrorCode) sN("+ sZ.n
{ iZZ (4
System.err.println("Error Code : " + nErrorCode); -WQ^gcO=7
} ?2Kt'1s#
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//停止文件下载 S"wg2X<
public void siteStop() +1~Z#^{&
{ K\)Td+~jc
bStop = true; S1U@UC
for(int i=0;i<nStartPos.length;i++) s[gKc '
fileSplitterFetch.splitterStop(); XW?b\!@ $
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}
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