/* Z4Q]By:/L
**SiteFileFetch.java 0^S$_L
*/ DcBAncsK
package NetFox; O0jOI3/P%
import java.io.*; mhrF9&s
import java.net.*; s.7=!JQ#]p
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public class SiteFileFetch extends Thread { `l'T/F\
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SiteInfoBean siteInfoBean = null; //文件信息Bean QBXEM=
long[] nStartPos; //开始位置 m2^vH+wD
long[] nEndPos; //结束位置 s?;8h &]=
FileSplitterFetch[] fileSplitterFetch; //子线程对象 9soEHG=P
long nFileLength; //文件长度 *7H
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boolean bFirst = true; //是否第一次取文件 roc DO8f
boolean bStop = false; //停止标志 C~4SPCU
File tmpFile; //文件下载的临时信息 E0RqY3
DataOutputStream output; //输出到文件的输出流 {Ni]S$7
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//负责整个文件的抓取,控制内部线程(FileSplitterFetch类) Lqxhy s
public SiteFileFetch(SiteInfoBean bean) throws IOException vrb@::sy0T
{ 1_S]t[?I/
siteInfoBean = bean; nZnqXclzxn
//tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); TO89;O
tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); V~*>/2+
if(tmpFile.exists ()) (U#,;
{ G@Z%[YNw
bFirst = false; KF#^MEw%
read_nPos(); I1m[M?
} @P~%4:!Hr
else dQSO8Jf
{ Pa0W|q#?X
nStartPos = new long[bean.getNSplitter()]; k%gj
nEndPos = new long[bean.getNSplitter()]; TaSS) n
} OWrQKd
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} eik_w(xPT
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public void run() ``<#F3
{ !%M,x~H
//获得文件长度 Q/3*65
//分割文件 5B|.cOE
//实例FileSplitterFetch s"#N;
//启动FileSplitterFetch线程 &'i_A%V
//等待子线程返回 R98YGW_
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try{ w;}5B~).
if(bFirst) 'kj
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{ nG3SDL#(k
nFileLength = getFileSize(); n\D/WLv M
if(nFileLength == -1) B|a <=~
{ Dks n
System.err.println("File Length is not known!"); Drtg7v{@\
} M2ex
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else if(nFileLength == -2) G{6@]72
{ )jl@hnA
System.err.println("File is not access!"); Xj+_"0
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} I2HV{1(i
else |~%RSS~b*
{ Epp>L.?r
for(int i=0;i<nStartPos.length;i++) .S|T{DMQ[
{ ij:a+T
nStartPos = (long)(i*(nFileLength/nStartPos.length)); `q]' ^EzJ
} @mZK[*Ak<*
for(int i=0;i<nEndPos.length-1;i++) nI?*[y}
{ j?*n@'
nEndPos = nStartPos[i+1]; $!. [R}
} r4[=pfe25
nEndPos[nEndPos.length-1] = nFileLength; Tv7W)?3h
} K_Y{50#
} 2~hdJ/
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//启动子线程 Z?xaXFm_
fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; &TRKd)w d
for(int i=0;i<nStartPos.length;i++) pD[&,gV$
{ ~SBW`=aP}
fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), 9;XbyA]
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), [sG`D-\P[
nStartPos,nEndPos,i); gYN;Fu-9Z
Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); XGR63hXND
fileSplitterFetch.start(); KB~1]cYMp
} "Cxj_V@\
// fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), 16eP7s
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); [dLc+h1{B
// Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", `:Wyw<^
nEndPos = " + nFileLength); _YR#J%xa
// fileSplitterFetch[nPos.length-1].start(); eD7\ ,}O
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//等待子线程结束 bE%
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//int count = 0; 'X+aYF}Ye
//是否结束while循环 H#GR*4x
boolean breakWhile = false; pW8?EGO@
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while(!bStop) *IbDA
{ Y<POdbg
write_nPos(); z5({A2q
Utility.sleep(500); vh"';L_*37
breakWhile = true; #]+BIr`
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for(int i=0;i<nStartPos.length;i++) rMWvW(@@D
{ }`
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if(!fileSplitterFetch.bDownOver) PT,*KYF_O"
{ zx"EAF{
breakWhile = false; Bi fI.2|
break; D_<B^3w)
} < q(i(%
} yD3vq}U!
if(breakWhile) }mp`!7?>O
break; sCy.i/y
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//count++; 4`v[p4k
//if(count>4) ;;UsHhbhI
// siteStop(); u*iqwm.
} b *|?7
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System.err.println("文件下载结束!"); moVf(7
} #|769=1
catch(Exception e){e.printStackTrace ();} ;w%g*S
} q{*[uJ}Xc"
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//获得文件长度 :/?
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public long getFileSize() /:A239=+ ?
{ gjT`<CW
int nFileLength = -1; wMF1HT<*
try{ 2\$<&]q
URL url = new URL(siteInfoBean.getSSiteURL()); }1CO>a<
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); hHw1<! M
httpConnection.setRequestProperty("User-Agent","NetFox"); aAoAjV NkK
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int responseCode=httpConnection.getResponseCode(); {3vm]
if(responseCode>=400) 6"?#s/fk
{ &C,]c#-+
processErrorCode(responseCode); H!y@.W{_
return -2; //-2 represent access is error @AG=Eq9<o
} yF` (GU
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String sHeader; 0~<t :q!
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for(int i=1;;i++) q{,yas7}
{ :1iXBG\
//DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); <9=RLENmY"
//Utility.log(in.readLine()); (o6u^#6
sHeader=httpConnection.getHeaderFieldKey(i); W#b++}S
if(sHeader!=null) mMhe,8E&
{ OB,T>o@
if(sHeader.equals("Content-Length")) AsZyPybq
{ /$vX1T
nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); QBoX3w=
break;
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} K1<l/
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} OZObx
else <
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break; 2(D&jL
} U_B`SS
} A^c5CJ_
catch(IOException e){e.printStackTrace ();} ; zy;M5l5.
catch(Exception e){e.printStackTrace ();} mOjl0n[To]
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Utility.log(nFileLength); 0XIrEwm@%
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return nFileLength; DUm/0q&
} QQ,w:OjA0
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//保存下载信息(文件指针位置) ~>$(5s2
private void write_nPos() ER$~kFE2yP
{ kS7T'[d
try{ }>j1j^c1='
output = new DataOutputStream(new FileOutputStream(tmpFile)); ?~Vev D
output.writeInt(nStartPos.length); T5U(B3j_
for(int i=0;i<nStartPos.length;i++) H
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{ 8J9o$Se
// output.writeLong(nPos); {24Pv#ZG#^
output.writeLong(fileSplitterFetch.nStartPos); .Qj`_q6=
output.writeLong(fileSplitterFetch.nEndPos); 0Zl1(;hx@
} i%B$p0U<
output.close(); ]Otl(\v(h
} \=~<I
catch(IOException e){e.printStackTrace ();} 1hp@.Fv
catch(Exception e){e.printStackTrace ();} @1[LD[<
} 9=~jKl%\vJ
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//读取保存的下载信息(文件指针位置) lu.2ZQE
private void read_nPos() Ki@8
{ Ix5yQgnB}j
try{ C[$<7Mi|;
DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); l}c<eEfOy"
int nCount = input.readInt(); `wG&Cy]v
nStartPos = new long[nCount]; 55|$Imnf
nEndPos = new long[nCount]; g(;ejKSR
for(int i=0;i<nStartPos.length;i++) ln!KL'T]
{ }mJ)gK5b 6
nStartPos = input.readLong(); B "}GAk}V
nEndPos = input.readLong(); DFjkp;`1
} tbk9N( R
input.close(); )Zm E"
} +V\NMW4d
catch(IOException e){e.printStackTrace ();} )'<zC
catch(Exception e){e.printStackTrace ();} (/Y
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} &q` =xF
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private void processErrorCode(int nErrorCode) RMrt4:-DI
{ gA) F
System.err.println("Error Code : " + nErrorCode); uTJ?@^nq
} \S2'3SDd/
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//停止文件下载 >"nk}@
public void siteStop() j+ys&pDczm
{ 1X9sx&5H
bStop = true; n2O7n@8
for(int i=0;i<nStartPos.length;i++) C,z]q$4
fileSplitterFetch.splitterStop(); wLUmRo56aR
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} ZmHl~MR@
} /iQ>he~fy
//负责部分文件的抓取 bKaV]Uy
**FileSplitterFetch.java @+!d@`w:z2
*/ 9_/1TjrDN
package NetFox; D 7E^;W)H
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