/* Bh'!aip k
**SiteFileFetch.java 1rs.
*/ :!hO9ho
package NetFox; g
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import java.io.*; p3Ozfk
import java.net.*; -<9Qez)y
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public class SiteFileFetch extends Thread { fDqDU
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SiteInfoBean siteInfoBean = null; //文件信息Bean x)Zb:"
long[] nStartPos; //开始位置 8:)[.
long[] nEndPos; //结束位置 ?zQW9e
FileSplitterFetch[] fileSplitterFetch; //子线程对象 w,up`W7,
long nFileLength; //文件长度 K\xnQeS<W
boolean bFirst = true; //是否第一次取文件 QT
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boolean bStop = false; //停止标志 m.!LL]]
File tmpFile; //文件下载的临时信息 E)`0(Z:E
DataOutputStream output; //输出到文件的输出流 /KNR;n'
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//负责整个文件的抓取,控制内部线程(FileSplitterFetch类) &-{%G=5~e%
public SiteFileFetch(SiteInfoBean bean) throws IOException M$Bb,s
{ 6212*Z_Af
siteInfoBean = bean; 'n>44_7 L
//tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); %hN(79:g
tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); ]uF7HX7F
if(tmpFile.exists ()) E_I-.o|
{ pJs`/
bFirst = false; g],]l'7H
read_nPos(); $STGH
} V8nQ/9R;
else $_;rqTk]g
{ {to(?`Y
nStartPos = new long[bean.getNSplitter()]; qA\&%n^j]
nEndPos = new long[bean.getNSplitter()]; +nHr+7}
} B8?9L8M}
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} OI*ltba?
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public void run() QlV(D<
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//获得文件长度 6P}?+ Gc
//分割文件 ~k-'
//实例FileSplitterFetch r]&sXKDc
//启动FileSplitterFetch线程 @*~yVV!5
//等待子线程返回 -s!J3DB
try{ D\+x/r?-I
if(bFirst) 0Ze&GK'Hf
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nFileLength = getFileSize(); R9^vAS4t[O
if(nFileLength == -1) H\n6t-l
{ wr:W}Z@pL
System.err.println("File Length is not known!"); H ?9Bo!
} ("ix!\1K@
else if(nFileLength == -2) 38m9t'
{ qoH:_o8ClO
System.err.println("File is not access!"); {5D%<Te
} X@}7 #Vt
else .a :7|L#a
{ 1Az&BZU[
for(int i=0;i<nStartPos.length;i++) qTRP2rH,L&
{ Pv,PS.,-
nStartPos = (long)(i*(nFileLength/nStartPos.length)); j>?nL~{
} :RukW.MR
for(int i=0;i<nEndPos.length-1;i++) lK7:qo
{ pfIK9>i
nEndPos = nStartPos[i+1]; xzOvc<u
} A'7Y{oPHX
nEndPos[nEndPos.length-1] = nFileLength; EPLHw
} {fDRVnI?
} 37:tu7e~c
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//启动子线程 ?Fa$lE4
fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; Rf8ZH
for(int i=0;i<nStartPos.length;i++) IKnf
{ X_nbNql
fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), 9S17Lr*c
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), x9\{a
nStartPos,nEndPos,i); Z:,\FB_U
Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); FN/l/OSb
fileSplitterFetch.start(); k$m'ebrS.~
} M E]7e^
// fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), +PWm=;tcC
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); :|S[i('
// Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", E$4H;SN \
nEndPos = " + nFileLength); Qi dI
// fileSplitterFetch[nPos.length-1].start(); w5s&Ws
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//等待子线程结束 Fje
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//int count = 0; '_Pb\
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//是否结束while循环 4clCZ@\K^
boolean breakWhile = false; W{!5}Sh
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while(!bStop) 3hBYx@jTO
{ "QS(4yw?jg
write_nPos(); g8&& W_BI
Utility.sleep(500); 3AR'Zvn
breakWhile = true; Gw-{`<CxE
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for(int i=0;i<nStartPos.length;i++) j|o/>^ 'e
{ 6tP!(
if(!fileSplitterFetch.bDownOver) n} !')r
{ ow
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breakWhile = false; -L2 +4
break; @ YWuWF
} 2Hx*kh2
} yB*aG
if(breakWhile) /8`9SS
break; @>~S$nw/
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//count++; GmJ
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//if(count>4) zK1\InP
// siteStop(); i@WO>+iB
} 2uY:p=DxG9
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System.err.println("文件下载结束!"); }3XjP55
} I
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catch(Exception e){e.printStackTrace ();} QjJlVlp
} [a$1{[|)
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//获得文件长度 jL5O{R[
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public long getFileSize() ^tm2Duv
{ Gv 8Z
int nFileLength = -1; /i Xl]<
try{ 0L"uU3
URL url = new URL(siteInfoBean.getSSiteURL()); yJqDB$0
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); I 6<LKI/
httpConnection.setRequestProperty("User-Agent","NetFox"); R*W1<W%q=
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int responseCode=httpConnection.getResponseCode(); L7(.dO0C
if(responseCode>=400) d@cyQFX
{ _3f/lG?&-
processErrorCode(responseCode); 1uA-!T*e>
return -2; //-2 represent access is error Ly, ];
} Ssa/;O2
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String sHeader; "4smW>f:%
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for(int i=1;;i++) B@ \0b|
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//DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); aG@GJ@w
//Utility.log(in.readLine()); >/@Q7V99{
sHeader=httpConnection.getHeaderFieldKey(i); B1i'Mzm-4
if(sHeader!=null) A"+t[0$.
{ 436SIh
if(sHeader.equals("Content-Length")) )F'hn+(B|G
{ 7A<}JaE!,
nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); c-@EHv
break; pAN$c"
} T%}x%9VO7
} +{)V%"{u:
else ,(c'h:@M
break; l~kxK.Ru
} u6\W"LW
} \vj xCkg{
catch(IOException e){e.printStackTrace ();} s\3ZE11L
catch(Exception e){e.printStackTrace ();} P8CIKoKCV
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Utility.log(nFileLength); b%X}{/ n
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return nFileLength; \jkDRR[
} 4=* ml}RP
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//保存下载信息(文件指针位置) _1$+S0G;
private void write_nPos() | 8n,|%e
{ yAel4b/}
try{ 0b,{4DOD
output = new DataOutputStream(new FileOutputStream(tmpFile)); :KRe==/
output.writeInt(nStartPos.length); 63i&e/pv
for(int i=0;i<nStartPos.length;i++) dUceZmAl
{
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// output.writeLong(nPos); E@="n<uS
output.writeLong(fileSplitterFetch.nStartPos); wLQM]$O
output.writeLong(fileSplitterFetch.nEndPos); (%M:=zm
} `5~<)
output.close(); /dVcNo3"
} D%'rq
catch(IOException e){e.printStackTrace ();} n^epC>a" b
catch(Exception e){e.printStackTrace ();} (G"/C7q
} [vCZD8"Y8
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//读取保存的下载信息(文件指针位置) 3_ =:^Z
private void read_nPos() qRZLv7X*j
{ ,76nDXy`
try{ mO\=#Q>
DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); a>nV!b\n5
int nCount = input.readInt(); r3Ih]|FK#
nStartPos = new long[nCount]; ve=1y)
nEndPos = new long[nCount]; D2#.qoP #
for(int i=0;i<nStartPos.length;i++) =1F F2#zS
{ ."v&?o
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nStartPos = input.readLong(); ou&7v<)x4
nEndPos = input.readLong(); g[xn0rG
} y {Mh ?H
input.close(); $4TawFf"nc
} 2 BwpxV8
catch(IOException e){e.printStackTrace ();} v|>'m#Ln2
catch(Exception e){e.printStackTrace ();} @ j4~`~8
} eJ$ {`&J
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private void processErrorCode(int nErrorCode) VoUAFEcs
{ X_I.f6v{
System.err.println("Error Code : " + nErrorCode); |<7nf7 5c}
} \6Hu&WHy
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//停止文件下载 a,p7l$kK
public void siteStop() !1?Nc}T0Q&
{ z#|tl/aP9
bStop = true; ( KG>lTdN
for(int i=0;i<nStartPos.length;i++) `\S~;O
fileSplitterFetch.splitterStop(); )'?@raB!
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} iW<B1'dp
} ^S`c-N
//负责部分文件的抓取 Ibl==Irk
**FileSplitterFetch.java j6$_U@)%O
*/ b*qC
package NetFox; K<tkNWasQ
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import java.io.*; FY]z*=
import java.net.*; 30/(
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public class FileSplitterFetch extends Thread { !ly]{DTmm
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String sURL; //File URL $X;fz)u
long nStartPos; //File Snippet Start Position X<"W@
long nEndPos; //File Snippet End Position |"a%S,I'
int nThreadID; //Thread's ID o%tvwv
boolean bDownOver = false; //Downing is over $PNIuC?=
boolean bStop = false; //Stop identical kQm\;[R
FileAccessI fileAccessI = null; //File Access interface enJE#4Z5&s
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public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException @7';bfsix
{ ojd/%@+u+Y
this.sURL = sURL; R|AGN*.
this.nStartPos = nStart; O ijG@bI8
this.nEndPos = nEnd; *tT}y(M
nThreadID = id; L$FLQyDR
fileAccessI = new FileAccessI(sName,nStartPos);//定位 r0\cgCn
} 'rdg
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public void run() t1
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{ GVp2|\-L
while(nStartPos < nEndPos && !bStop) t=ry\h{Pc
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try{ m:~s6c6H
URL url = new URL(sURL); iwfv t^
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); b-+iL
httpConnection.setRequestProperty("User-Agent","NetFox"); KdOy3O_5N
String sProperty = "bytes="+nStartPos+"-"; q-}J0vu\K
httpConnection.setRequestProperty("RANGE",sProperty); hQgi--Msw'
Utility.log(sProperty); BY$%gIB6>
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InputStream input = httpConnection.getInputStream(); ~z!U/QR2
//logResponseHead(httpConnection); _,;c2
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byte[] b = new byte[1024]; &`63"^y
int nRead; X Jy]d/
while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) _A\c 6#
{ (byFr9z
nStartPos += fileAccessI.write(b,0,nRead); '5eW"HGU]`
//if(nThreadID == 1) vV|u+v{
// Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); 9oY%v7
} h7
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Utility.log("Thread " + nThreadID + " is over!"); U:xr['
bDownOver = true; lG;sDR|)(
//nPos = fileAccessI.write (b,0,nRead); nMXSpX>!|
} =2{ ^qvP
catch(Exception e){e.printStackTrace ();} D{/GjFO
} C(_xqn
} u*&wMR>Crf
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//打印回应的头信息 nlK"2/W
public void logResponseHead(HttpURLConnection con) -`B|$ W
{ uV *&a~
for(int i=1;;i++) #2&_WM!
{ jQ_j#_Vle
String header=con.getHeaderFieldKey(i); @QMMtfeLj
if(header!=null) 0=&Hm).
//responseHeaders.put(header,httpConnection.getHeaderField(header)); ek#{!9-
Utility.log(header+" : "+con.getHeaderField(header)); jO$3>q
else Xi1/wbC
break; WrL&$dEJ?M
} F\&R nDJ
} [*#ms=Zdc
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public void splitterStop() _y),C
{ p}}o#a~V),
bStop = true; icHc!m?
} 4RNB\D
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} Qg9 N?e{z
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/* o|AV2FM)
**FileAccess.java +=^10D
*//文件访问(定位,写) a4L8MgF&$-
package NetFox; $v+Q~\'
import java.io.*; L*1C2EL/q
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public class FileAccessI implements Serializable{ 3xh~xE
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//RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 \:\rkc9LI
RandomAccessFile oSavedFile; sUcx;<|BC
long nPos; 9dr\=e6) C
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public FileAccessI() throws IOException ZPY#<^WOzr
{ _CBG?
this("",0); [L"(flY(E
} Edc< 8-
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public FileAccessI(String sName,long nPos) throws IOException jX!,xS%(
{ vz*QzVk1
oSavedFile = new RandomAccessFile(sName,"rw"); iXMs*GcK
this.nPos = nPos; ,l#Ev{
oSavedFile.seek(nPos); G0|j3y9$
} cWP34;NNM
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public synchronized int write(byte[] b,int nStart,int nLen) [ K;3Qf)
{ {xp/1?Mo*
int n = -1; vZmM=hW ~
try{ U|={LU
oSavedFile.write(b,nStart,nLen); ogH{
n = nLen; Lk6UT)C
} f3]Z22Yq
catch(IOException e) r:2G 11[
{ DDyeNuK
e.printStackTrace (); V.6h6B!vB
} p@y?xZS
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return n; ?`,<l#sj
} >fPa>[_1
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