/* QzS=oiL
**SiteFileFetch.java ~Z' /b|x<3
*/ X8y :=k,E
package NetFox; 6G7+&g`
import java.io.*; jwmPy)X|s\
import java.net.*; {$Z
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public class SiteFileFetch extends Thread { M}]4tAyT
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SiteInfoBean siteInfoBean = null; //文件信息Bean X3'd~!a)
long[] nStartPos; //开始位置 {9vMc
long[] nEndPos; //结束位置 31cZ6[
FileSplitterFetch[] fileSplitterFetch; //子线程对象 T_[
long nFileLength; //文件长度 X 4\V4_
boolean bFirst = true; //是否第一次取文件 }kSP p
boolean bStop = false; //停止标志 %k @4}M>
File tmpFile; //文件下载的临时信息 S
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DataOutputStream output; //输出到文件的输出流 g%okYH?
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//负责整个文件的抓取,控制内部线程(FileSplitterFetch类) YmD~&J
public SiteFileFetch(SiteInfoBean bean) throws IOException w5=<}1`St
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siteInfoBean = bean; .|@2Uf
//tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); +I +RNXR/{
tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); cZ3A~dTOR
if(tmpFile.exists ()) pnUL+UYeM
{ a:KL{e[
bFirst = false; -Gjz+cRns
read_nPos(); eoJ*?v
} P| ftEF
else #vc!SI
{ udPLWrPF\
nStartPos = new long[bean.getNSplitter()]; bnN&E?{hF1
nEndPos = new long[bean.getNSplitter()]; XB a^
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} nfh<3v|kvR
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} <pM6fI6BD
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public void run() 7!;zkou
{ k"E|E";B
//获得文件长度 _Td#C1g3
//分割文件 KN&|&51p}
//实例FileSplitterFetch J!">L+Zcx
//启动FileSplitterFetch线程 QcX&q%*0
//等待子线程返回 MRT<hB
try{ HkY#i;%N
if(bFirst) ru|*xNXKgC
{ Hs6Kki1
nFileLength = getFileSize(); -j1]H"-
if(nFileLength == -1) 7>F [7_
{ ( X+2vN
System.err.println("File Length is not known!"); uX%$3k
} 4UND;I&
else if(nFileLength == -2) B~b
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{
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System.err.println("File is not access!"); x$FcF8
} TD78&a#
else "U$](k.<VA
{ x:h)\%Dg<
for(int i=0;i<nStartPos.length;i++) qyh]v [
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nStartPos = (long)(i*(nFileLength/nStartPos.length)); gSf> +|
} Sggl*V/q
for(int i=0;i<nEndPos.length-1;i++) TX7dwmt)N
{ &VcO,7 A|
nEndPos = nStartPos[i+1]; OX?E3 <8`
} F!w|5,)
nEndPos[nEndPos.length-1] = nFileLength; JB=L{P J
} irP*:QM
} y\[q2M<
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//启动子线程 j?g#8L;W\w
fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; d(Hqj#`-31
for(int i=0;i<nStartPos.length;i++) ` k(Q:
{ G:`So
fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), E,cQ9}/
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), RD;A
nStartPos,nEndPos,i); }J2f$l>R
Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); ^(@]5$^Z
fileSplitterFetch.start(); Ps;4 ]=c
} xMa9o
// fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), nZG
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siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); 9[lk=1.qN
// Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", @ScC32X
nEndPos = " + nFileLength); de[NIDA;`
// fileSplitterFetch[nPos.length-1].start(); .[1@wW&L
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//等待子线程结束 sGpAaGY>
//int count = 0; t2|0no
//是否结束while循环 )J2UNIgN
boolean breakWhile = false; DF-.|-^9I
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while(!bStop) Zv?"1Y< L
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write_nPos(); ] ;HCt=I~
Utility.sleep(500); ps:E(\
breakWhile = true; "9N;&^I
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for(int i=0;i<nStartPos.length;i++) qv|}>wU
{ 6\.LG4@LO
if(!fileSplitterFetch.bDownOver) _::ssnG3jT
{ ikb77?.
breakWhile = false; OKk"S_`
break; aSgKh
} Vock19P
} &5[+p{2
if(breakWhile)
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break; r`RLDN!`
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//count++; /s+S\
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//if(count>4) +Hp`(^(
// siteStop(); e@/' o/
} 6Ypc]ym=J
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System.err.println("文件下载结束!"); A>HCX 4i
} /FC(d5I
catch(Exception e){e.printStackTrace ();} 7KJ0>0~Et
} oTcf[<
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//获得文件长度 #\ysn|!J,
public long getFileSize() (Jk[%_b>_
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int nFileLength = -1; `U>2H4P
try{ 'C#[iRG4
URL url = new URL(siteInfoBean.getSSiteURL()); G%=
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HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); s#")hMJQ
httpConnection.setRequestProperty("User-Agent","NetFox"); >.G#\w
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int responseCode=httpConnection.getResponseCode(); uY/CiTWr
if(responseCode>=400) h^''ue"
{ '*
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processErrorCode(responseCode); >m{>0k(^`
return -2; //-2 represent access is error 'iDkAmvD
} RZ ?SiwE
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String sHeader; -z
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for(int i=1;;i++) 9>`dB
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//DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); vz1I/IdTd
//Utility.log(in.readLine()); `~41>mM%
sHeader=httpConnection.getHeaderFieldKey(i); R\/tKZJjb
if(sHeader!=null) NmF8BmIj
{ &fU48n1Uh
if(sHeader.equals("Content-Length")) YIb7y1\UM
{ `9P`f4x
nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader));
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break; ,Z! I ^
} vGI)c&C>
} K,*-Y)v2W
else W ,v0~
break; zG^$-L.n
} I
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} }Gx@1)??
catch(IOException e){e.printStackTrace ();} 2pP"dX
catch(Exception e){e.printStackTrace ();} Hc8!cATQk
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Utility.log(nFileLength); ;ZP!:,
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return nFileLength; :/t_5QN
} :2:%
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//保存下载信息(文件指针位置) -mLu!32I<
private void write_nPos() 1|:;~9n<t
{ +[$Td%6
try{ aOsc_5XDR;
output = new DataOutputStream(new FileOutputStream(tmpFile)); ;sz _W%-;@
output.writeInt(nStartPos.length); &SPr#OkW
for(int i=0;i<nStartPos.length;i++) ^BW8zu@=O
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// output.writeLong(nPos); ?MFXZ/3(ba
output.writeLong(fileSplitterFetch.nStartPos); \nL@P6X
output.writeLong(fileSplitterFetch.nEndPos); l\d[S]
} ^$RpP+d
output.close(); #c'}_s2F[
} D}-HWJQA3
catch(IOException e){e.printStackTrace ();} \{ C
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catch(Exception e){e.printStackTrace ();} <dz_7hR"
} `FX?P`\@I
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//读取保存的下载信息(文件指针位置) 57;(
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private void read_nPos() %?8.UW\m
{ vVsaGW
try{ <7/7+_y
DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); r'XWt]B+[
int nCount = input.readInt(); .v9i|E=<~
nStartPos = new long[nCount]; C/ ]Bx
nEndPos = new long[nCount]; |O"Pb`V+
for(int i=0;i<nStartPos.length;i++) 2+R]q35-
{ -Q ];o~
nStartPos = input.readLong(); 5p3:8G7
nEndPos = input.readLong(); F#qc#s
} l
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input.close(); zhyf}Ta'
} 6k+tO%{~
catch(IOException e){e.printStackTrace ();} i=fhK~Jd
catch(Exception e){e.printStackTrace ();} h_g"F@
} {~ w!
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private void processErrorCode(int nErrorCode) VwXR,(
{ D?H|O[
System.err.println("Error Code : " + nErrorCode); X6?Gxf,
} `1FNs?j
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//停止文件下载 v)*eLX$
public void siteStop() i/C0
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{ ma`sv<f4-!
bStop = true; f
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for(int i=0;i<nStartPos.length;i++)
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fileSplitterFetch.splitterStop(); |I.5]r-EK
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} GzT?I
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} Q"oJhxS
//负责部分文件的抓取 X{h[
**FileSplitterFetch.java dcE(uf
*/ KF`mOSP
package NetFox; |Y(
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import java.io.*; mx2Ov u
import java.net.*; RF\h69]:I
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public class FileSplitterFetch extends Thread { hXx:D3h
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String sURL; //File URL xQqZi b5I
long nStartPos; //File Snippet Start Position |j$$0N
long nEndPos; //File Snippet End Position \6/!{D,
int nThreadID; //Thread's ID }jNVR#D:
boolean bDownOver = false; //Downing is over \T;(k?28HN
boolean bStop = false; //Stop identical R>,_C7]u
FileAccessI fileAccessI = null; //File Access interface 3C#Sr6
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public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException zR}vR9Ls
{ 3X1
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this.sURL = sURL; }y%mG&KSz
this.nStartPos = nStart; =jRC4]M})
this.nEndPos = nEnd; ?"p.Gy)
nThreadID = id; v=YI%{tx)
fileAccessI = new FileAccessI(sName,nStartPos);//定位 /J&_ZDNV~
} }wGy#!CSza
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public void run() #-g2p?+i&
{ *47%|bf`
while(nStartPos < nEndPos && !bStop) MAgoxq~;V
{ TnPx.mwK\
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try{ 8fQXif\z
URL url = new URL(sURL); ` =I@W
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); AH#Dk5#G
httpConnection.setRequestProperty("User-Agent","NetFox"); -$(2Z[
String sProperty = "bytes="+nStartPos+"-"; -p20UP 1I
httpConnection.setRequestProperty("RANGE",sProperty); G 2FD'Sf
Utility.log(sProperty); ^FK-e;J
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InputStream input = httpConnection.getInputStream(); N-Sjd%Z
//logResponseHead(httpConnection); jp#/]>(9Z
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byte[] b = new byte[1024]; Opf^#6'mq
int nRead;
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while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) I<$m%
{ F3<Ip~K
nStartPos += fileAccessI.write(b,0,nRead); r-c1_
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//if(nThreadID == 1) 8"J6(KS
// Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); ROr| <
} ~|=G3(I[
^ V8?6E
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Utility.log("Thread " + nThreadID + " is over!"); ag"Nf-o/Y
bDownOver = true; )|L#i2?:
//nPos = fileAccessI.write (b,0,nRead); $R/@%U)-o
} m7,;Hr(
catch(Exception e){e.printStackTrace ();} v^1n.l %E
} >SHW
} (^LR9 CW
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//打印回应的头信息 "o$)z'q
public void logResponseHead(HttpURLConnection con) F;)qM|7
{ .jbT+hhM
for(int i=1;;i++) txemu*
{ e><