/* npd:a Gx
**SiteFileFetch.java >=4('
*/ |BUgsE
package NetFox; @,j,GE%
import java.io.*; +n<W#O%
import java.net.*; "x vizvR
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public class SiteFileFetch extends Thread { @qpj0i+>*
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SiteInfoBean siteInfoBean = null; //文件信息Bean T 5F)
long[] nStartPos; //开始位置 'b0r?A~c=
long[] nEndPos; //结束位置 <F8e?xy
FileSplitterFetch[] fileSplitterFetch; //子线程对象 W*Si"s2
long nFileLength; //文件长度 o*Xfgc
boolean bFirst = true; //是否第一次取文件 9Z2 1|5
boolean bStop = false; //停止标志 JA*+F1s
File tmpFile; //文件下载的临时信息 nEUUD3a
DataOutputStream output; //输出到文件的输出流 ps;d bY*s6
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//负责整个文件的抓取,控制内部线程(FileSplitterFetch类) Y]7503J
public SiteFileFetch(SiteInfoBean bean) throws IOException ,kf.'N
{ wTD}c1J(
siteInfoBean = bean; RRXp9{x`
//tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); 51u\am'T
tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); L9<\vJ
if(tmpFile.exists ()) ?;_*8Doq-a
{ 1BEs> Sm
bFirst = false; C5~n^I|
read_nPos(); r6nnRN/S=
} 4BSqL!i(
else $}.+}'7$
{ KZTLIZxI-
nStartPos = new long[bean.getNSplitter()]; OLqV#i[K#9
nEndPos = new long[bean.getNSplitter()]; u>]3?ty`
} jo^c>ur
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public void run() d]Y;rqjue
{ 0-[naGz
//获得文件长度 Lg~C:BNF
//分割文件 0QT:@v2R
//实例FileSplitterFetch Fuzb4Df
//启动FileSplitterFetch线程 ALy7D*Z]w
//等待子线程返回 /`l;u7RD
try{ }W'4(V;:
if(bFirst) 2lO(f+
{ ^86M94k
nFileLength = getFileSize(); zPc"r$'0U
if(nFileLength == -1) x+j@YWDpG"
{ P%)r4+at
System.err.println("File Length is not known!"); 6Iqy"MQuq
} pr,,E[
else if(nFileLength == -2) hPUAm6b;
{ ^Fh*9[Zf$
System.err.println("File is not access!"); EG`6T
} k#zDY*kj
else ;Y[D#Ja-
{ ^~.AV]t|
for(int i=0;i<nStartPos.length;i++) A[8m3L#k
{ E]rXp~AZm
nStartPos = (long)(i*(nFileLength/nStartPos.length)); DnFzCJ
} eb}P/
for(int i=0;i<nEndPos.length-1;i++) *!ng)3#
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nEndPos = nStartPos[i+1]; }%8ZN :
} 0cE9O9kE
nEndPos[nEndPos.length-1] = nFileLength; p<=Lh47 =
} mf3,V|>[\
} &hO-6(^I
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//启动子线程 5h&sdzfG
fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; =T,Q7Dh
for(int i=0;i<nStartPos.length;i++) 9-/q-,
{ aTTkj\4
fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), Gk{ 'U
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), VaY#_80$s
nStartPos,nEndPos,i); k9f|R*LM
Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); (0H=f6N
fileSplitterFetch.start(); |67Jw2
} mLqqo2u
// fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), zQ|2D*W
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); fJ[ ^_,O
// Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", 3fhY+$tq
nEndPos = " + nFileLength); Q $}#&
// fileSplitterFetch[nPos.length-1].start(); \0x>#ygX
} Xo#/9
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//等待子线程结束 @T~XwJ~
//int count = 0; dazNwn
//是否结束while循环 Tc/^h4xH
boolean breakWhile = false; u"=]cBRWL6
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while(!bStop) n2bhCd]j<b
{ iR nj N
write_nPos(); \ s aV8U7B
Utility.sleep(500); pOXI*0_g.
breakWhile = true; "D
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for(int i=0;i<nStartPos.length;i++) ywAvqT,
{ dGYR
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if(!fileSplitterFetch.bDownOver) Jg;[k
{ @01.Pd
breakWhile = false; iHGVR
break; A.vAk''(}+
} Ze~P6
} Uv(R^50>
if(breakWhile)
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break; ZPmqoR[
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//count++; 94+^K=lAX
//if(count>4) }ouGxs+^[
// siteStop(); {&n- @$?
} ~i"=:D
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System.err.println("文件下载结束!"); (Lgea
} v:P]o9Oj8
catch(Exception e){e.printStackTrace ();} +d6onO{8
} v1,#7sAW'
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//获得文件长度 ;DuVb2~+
public long getFileSize() '#f<wfn
{ Iw`tbN
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int nFileLength = -1; .D
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try{ x"Ky_P~
URL url = new URL(siteInfoBean.getSSiteURL()); <R]m(
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); {s
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httpConnection.setRequestProperty("User-Agent","NetFox"); u2oS Ci
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int responseCode=httpConnection.getResponseCode(); lg aSIXDK
if(responseCode>=400) #"N60T@
{ $pES>>P
processErrorCode(responseCode); LL#REK|lm8
return -2; //-2 represent access is error _ p\L,No
} [[ie
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String sHeader; uvbVb"\"Yk
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for(int i=1;;i++) CT[9=wV)m%
{ r tuaU=U
//DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); y(J~:"}7)
//Utility.log(in.readLine()); e]RzvWq
sHeader=httpConnection.getHeaderFieldKey(i); o pTXI*QA
if(sHeader!=null) |fgUW.
{ Y)1/fEM
if(sHeader.equals("Content-Length")) )%K<pIk
{ !zX()V
nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); #hxYB
break; 5skN'*oG
} 9-;-jnDy
} 4aS}b3=n
else Z\nDR|3
break; A9.TRKb=8
} vha9,5_
} xsH1)
catch(IOException e){e.printStackTrace ();} #dZs[R7h
catch(Exception e){e.printStackTrace ();} 1C<cwd;9
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Utility.log(nFileLength); [7vV#s3kJ
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return nFileLength; j}^w:W76
} o]<Z3)
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//保存下载信息(文件指针位置) axnlI*!
private void write_nPos() aJ+V]WmA
{ pp@
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try{ V'i-pn2gyu
output = new DataOutputStream(new FileOutputStream(tmpFile)); H>CbMz1u
output.writeInt(nStartPos.length); =Wcvb?;*
for(int i=0;i<nStartPos.length;i++) 7_I83$p'
{ l8oaDL\f
// output.writeLong(nPos); ^p3GT6
output.writeLong(fileSplitterFetch.nStartPos); "W7|Xp
output.writeLong(fileSplitterFetch.nEndPos); `WayR^ 9
} ab6I*DbF
output.close(); e$~[\
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} d6J/)nl
catch(IOException e){e.printStackTrace ();} ' h7Faj
catch(Exception e){e.printStackTrace ();} QF>T)1&J[7
} 8qyEHUN2q
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//读取保存的下载信息(文件指针位置) ]*=4>(F[
private void read_nPos() /.SG? 5t4
{ '`2KLO>!
try{ %>m.Z#R(
DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); AQ'%}(#0
int nCount = input.readInt(); I){4MoH.
nStartPos = new long[nCount]; ,P a*; o\
nEndPos = new long[nCount]; X!]v4ma`
for(int i=0;i<nStartPos.length;i++) O <Rh[Aqn
{ `==l2AX
nStartPos = input.readLong(); XO
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nEndPos = input.readLong(); h5P_kZJ
} ;XN|dq
input.close(); "8f4s|@3
} P6v ANL-B
catch(IOException e){e.printStackTrace ();} { M**a
catch(Exception e){e.printStackTrace ();} 4m0^
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} +hN>Q$E
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private void processErrorCode(int nErrorCode) RDdnOzx
{ 3}|[<^$
System.err.println("Error Code : " + nErrorCode); ,\M77V
} Y^+x<
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//停止文件下载 p\&O;48=
public void siteStop() D4L&6[W
{ Bv<g Vt
bStop = true; %,@pV%2
for(int i=0;i<nStartPos.length;i++) _*o<<C\E
fileSplitterFetch.splitterStop(); Xz^nm\
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} V%8(zt
} mUg :<.^
//负责部分文件的抓取 dxX`\{E
**FileSplitterFetch.java ]hS:0QE
*/ m4/qxm"Dx:
package NetFox; qZd*'ki<
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import java.io.*; u9"=t
import java.net.*;
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public class FileSplitterFetch extends Thread { P73GH
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String sURL; //File URL %/A>'p,~
long nStartPos; //File Snippet Start Position KfiSQ!{
long nEndPos; //File Snippet End Position ?#z$(upQ
int nThreadID; //Thread's ID Py; 5z
boolean bDownOver = false; //Downing is over 6}6Q:V|
boolean bStop = false; //Stop identical ?06gu1z/
FileAccessI fileAccessI = null; //File Access interface 5Y *4a%"
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public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException ozRO:*51
{ +YvF+E
this.sURL = sURL; #tV1?q
this.nStartPos = nStart; M/W"M9u
this.nEndPos = nEnd; o|@0.H|
nThreadID = id; =o9s?vOJ
fileAccessI = new FileAccessI(sName,nStartPos);//定位 s;vt2>;q+e
} =Kkqk
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public void run() j.&dHtp
{ t(3f} ?
while(nStartPos < nEndPos && !bStop) 2_wue49-l
{ dL0Q8d\^T
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try{ _pTcSp3
URL url = new URL(sURL); ps<Ef
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); XM:BMd|
httpConnection.setRequestProperty("User-Agent","NetFox"); 0f@+o}i=)
String sProperty = "bytes="+nStartPos+"-"; uY5|Nmiu
httpConnection.setRequestProperty("RANGE",sProperty); )V1xL_hx/
Utility.log(sProperty); .
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InputStream input = httpConnection.getInputStream(); G=cRdiy`C
//logResponseHead(httpConnection); t<v.rb
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byte[] b = new byte[1024]; hQ|mow@Zmz
int nRead; 5k0iVpjQ
while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) _m9k2[N!
{ oLoc jj~T
nStartPos += fileAccessI.write(b,0,nRead); @6"MhF
//if(nThreadID == 1) liS'
// Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); b=EI?XwJ
} !P{ /;Q
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Utility.log("Thread " + nThreadID + " is over!"); NZ1B#PG,c
bDownOver = true; {bXN[=j
//nPos = fileAccessI.write (b,0,nRead); q1VKoKb6\:
} T~xVHk1
catch(Exception e){e.printStackTrace ();} |qX?F`
} a[K&;)
} L/u|90)L
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//打印回应的头信息 >>{):r
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public void logResponseHead(HttpURLConnection con) R[m-jUL
{ ?^~ZsOd8B
for(int i=1;;i++) Pl B3"{}0Q
{ *O$|,EsY
String header=con.getHeaderFieldKey(i); A"7YkOfwH
if(header!=null) XCI
//responseHeaders.put(header,httpConnection.getHeaderField(header)); D|5mNX%e
Utility.log(header+" : "+con.getHeaderField(header)); A$wC!P|;
else Y!M0JSaM
break; %G!!0V!
} *P' X[z
} p7YYAh@x\
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public void splitterStop() "e-Y?_S7R8
{ .JKH=?~\
bStop = true; JzEg`Sn^
} E{V?[HcWq
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} &0T.o,&y
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/* ^KbR@Ah
**FileAccess.java Vs"b
*//文件访问(定位,写) P.YT/
package NetFox; 5mAb9F8@
import java.io.*; CG%bZco((
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public class FileAccessI implements Serializable{ Kz;Ar&^`N
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//RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 W7!Rf7TK
RandomAccessFile oSavedFile; - egTZW-
long nPos; uYeb RCdR
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public FileAccessI() throws IOException qq!ZYWy2
{ wp~}1]g
this("",0); l=xG<)Okb
} c7+6[y DVE
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public FileAccessI(String sName,long nPos) throws IOException <7y/)b@
{ o+x%q<e;c
oSavedFile = new RandomAccessFile(sName,"rw"); pS8\ B
this.nPos = nPos; ]n4PM=hz
oSavedFile.seek(nPos); ;C-ds
} }h1BAKg
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public synchronized int write(byte[] b,int nStart,int nLen) ,xU#uyB
{ iU+SXsXLR4
int n = -1; 3sV$#l P
try{ =RUy4+0>F
oSavedFile.write(b,nStart,nLen); 6`2i'flv
n = nLen; FqJd
} qVU<jt
catch(IOException e) Q7u|^Gu,5
{ &</)k|.A6\
e.printStackTrace (); =H7p&DhD