/* C\*0621
**SiteFileFetch.java 9
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*/ [ub)`-6 u
package NetFox; G%T<wKD<
import java.io.*; k;HI-v
import java.net.*; >iI_bcqF
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public class SiteFileFetch extends Thread { \F<C$cys\
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SiteInfoBean siteInfoBean = null; //文件信息Bean 70Ei<
long[] nStartPos; //开始位置 ;W3c|5CE
long[] nEndPos; //结束位置 uk3PoB^>
FileSplitterFetch[] fileSplitterFetch; //子线程对象 *enT2Q
long nFileLength; //文件长度 ki8Jl}dr
boolean bFirst = true; //是否第一次取文件 ZBjb f_M:
boolean bStop = false; //停止标志 tY60~@YO&
File tmpFile; //文件下载的临时信息 ,P X7}//X^
DataOutputStream output; //输出到文件的输出流 j#9n.i
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//负责整个文件的抓取,控制内部线程(FileSplitterFetch类) Hm_&``='
public SiteFileFetch(SiteInfoBean bean) throws IOException :V# B]:Z9
{ Bb7Vf7>
siteInfoBean = bean; rrl{3
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//tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); o'ZW
tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); 87hU#nVYh
if(tmpFile.exists ()) sd
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{ (n2=.9k!
bFirst = false; }KV)F,`
read_nPos(); )Hqn
} !lI1jb"
else z[0t%]7l
{ 8zpTCae^=7
nStartPos = new long[bean.getNSplitter()]; z*WQ=l2
nEndPos = new long[bean.getNSplitter()]; 6g"qwWZp
} nW ]T-!
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} ]GzfU'fOn|
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public void run() V/J-zH&
{ f1I/aR V:+
//获得文件长度 2XV3f$, H
//分割文件 CMYkxU
//实例FileSplitterFetch 1P/4,D@
//启动FileSplitterFetch线程 \5F
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//等待子线程返回 ?8$h%Ov-
try{ SOvo%L@
if(bFirst) }1YQ?:@
{ f:h<tlob
nFileLength = getFileSize(); xUDXg*
if(nFileLength == -1) DC=XPn/V
{ ,>3|\4/Q
System.err.println("File Length is not known!"); Y^'mBM#j
} Oy yE0
else if(nFileLength == -2) D=~3N
{ [?F]S:/i
System.err.println("File is not access!"); h\*I*I8C
} "=*
else 9w$+Qc
{ X1GM\*BE
for(int i=0;i<nStartPos.length;i++) ^-K~y
{ [K `d?&
nStartPos = (long)(i*(nFileLength/nStartPos.length)); 5}`e"X
} V Rz9;=m
for(int i=0;i<nEndPos.length-1;i++) E=l^&[dIl
{ Ve4@^Jy;
nEndPos = nStartPos[i+1]; 7R>Pk9J
} vkW]?::Cfd
nEndPos[nEndPos.length-1] = nFileLength; X=pPkgW
} GD
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} Y !AQ7F
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//启动子线程 M l9
fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; (W_U<~`t
for(int i=0;i<nStartPos.length;i++) G1/
{ K?acRi
fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), 3+iQct[
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), \m1jV>q
nStartPos,nEndPos,i); 4GqE%n+ta~
Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); f}+8m .g2
fileSplitterFetch.start(); bd3q207>
} kB;!EuL
// fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), ;.b^A
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); :faB7wduW;
// Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", !!UQ,yU
nEndPos = " + nFileLength); <^wqN!/
// fileSplitterFetch[nPos.length-1].start(); 'A9U[|
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//等待子线程结束 ?K^~(D8(
//int count = 0; 73kL>u
//是否结束while循环 B;xGTl@8
boolean breakWhile = false; ;U$EM+9
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while(!bStop) O,?aVgY
{ >X-*Hu'U#
write_nPos(); HU+zzTgI
Utility.sleep(500); /a:L"7z
breakWhile = true; :]^FTnO
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for(int i=0;i<nStartPos.length;i++) TGu]6NzyZ
{ 9aZ^m$tAt
if(!fileSplitterFetch.bDownOver) UqZ#mK i
{ d]w%zo,yr
breakWhile = false; d3K-|
break; ]~-vU{
} UIi`bbJ
} y]TNjLpo$
if(breakWhile) D!CuE7}
break; _%$(D"^j
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//count++; U~w g'
//if(count>4) MN22#G4j^w
// siteStop(); m*^|9*dIC
} 4JD 8w3u/
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System.err.println("文件下载结束!"); %V CfcM}5I
} 1xkU;no
catch(Exception e){e.printStackTrace ();} #1C~i}J1
} 9C{\=?e;
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//获得文件长度 <XHS@|
public long getFileSize() "n3i(sZ
{ ;5.o;|w?!
int nFileLength = -1; 6!3Jr
try{ I:qfB2tL)O
URL url = new URL(siteInfoBean.getSSiteURL()); n6a*|rE
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); T"GuE[?a
httpConnection.setRequestProperty("User-Agent","NetFox"); joN}N }U
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int responseCode=httpConnection.getResponseCode(); ;Q]j"1c
if(responseCode>=400) %YaUc{.%
{ ^3-Wxn9&
processErrorCode(responseCode); iZy`5
return -2; //-2 represent access is error L8~nx}UP5
} O&:0mpRZ
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String sHeader; _uO#0
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for(int i=1;;i++) >Ufjmm${
{ ;
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//DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); Y"uFlHN&i
//Utility.log(in.readLine()); Jb~ -)n2
sHeader=httpConnection.getHeaderFieldKey(i); E00zf3Jgv'
if(sHeader!=null) UEq;}4Bo
{ I>27U<PX
if(sHeader.equals("Content-Length")) >t"]gQHtx
{ (Jw[}&+
nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); !k&~|_$0@
break; [LonY49
} axY-Vj
} Hr$oT=x[
else LaZF=<w(
break; k:4?3zJI
} bmAgB}Ior
} sK:,c5^
catch(IOException e){e.printStackTrace ();} t#y
catch(Exception e){e.printStackTrace ();} xX'Uq_Jv
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Utility.log(nFileLength); r<oI4px
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return nFileLength; 0;)6ZU
} z#!xqIg0
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//保存下载信息(文件指针位置) (oxe\Qk
private void write_nPos() 'D-#,X
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{ &F}1\6{fL
try{ 6QRfju'
output = new DataOutputStream(new FileOutputStream(tmpFile)); =3=KoH/'
output.writeInt(nStartPos.length); zJMKgw,i*
for(int i=0;i<nStartPos.length;i++) l\^q7cXG
{ LeW.uh3.
// output.writeLong(nPos); e![Q1!r
output.writeLong(fileSplitterFetch.nStartPos); lq@Vb{Z
output.writeLong(fileSplitterFetch.nEndPos); AEwb'
} 4(4JQ(5
output.close(); =tcPYYD
} *eXO?6f%s^
catch(IOException e){e.printStackTrace ();} $UjSP
catch(Exception e){e.printStackTrace ();} 2LYd
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} ZZC=
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//读取保存的下载信息(文件指针位置) YeJ95\jf
private void read_nPos() g]xZ^M+
{ ~,e!t.339
try{ t%z7#}9$
DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); IQ{Xj3;?y
int nCount = input.readInt(); V8&/O)} o
nStartPos = new long[nCount]; L1Q QU
nEndPos = new long[nCount]; bT-G<h*M
for(int i=0;i<nStartPos.length;i++) (?\ZN+V)
{ gE=~.P[ZX
nStartPos = input.readLong(); fnnwe2aso
nEndPos = input.readLong(); vP}K(' (
} oQ;f`JC^
input.close(); /^[)JbgB
} ):78GVp
catch(IOException e){e.printStackTrace ();} 5 J|;RtcR
catch(Exception e){e.printStackTrace ();} gSj-~kP
} CHpDzG>]4
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private void processErrorCode(int nErrorCode) %Y Rg1UKY
{ *Kzs(O
System.err.println("Error Code : " + nErrorCode); @@|E1'c7
} s*CKFEb#
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//停止文件下载 !P Gow
public void siteStop() G^mk<pH
{ z3*G(,
bStop = true; C6"!'6 W
for(int i=0;i<nStartPos.length;i++) w78Ius,
fileSplitterFetch.splitterStop(); &<Gq-IN
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} RO.(k!J .
} vWkKNB
//负责部分文件的抓取 "(efd~.]
**FileSplitterFetch.java x#8=drh.:C
*/ ,t+ATaOF
package NetFox; r3j8[&B"
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import java.io.*; H+5]3>O-$
import java.net.*; aY:(0en]&
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public class FileSplitterFetch extends Thread { 6$6NVq
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String sURL; //File URL *Ra")(RnDK
long nStartPos; //File Snippet Start Position n&C9f9S
long nEndPos; //File Snippet End Position zRJy3/>
int nThreadID; //Thread's ID k(qQvn
boolean bDownOver = false; //Downing is over Wq9s[)F"Z
boolean bStop = false; //Stop identical ?^ErrlI_
FileAccessI fileAccessI = null; //File Access interface #P9VX5Tg
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public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException =h_gj >
{ &\X;t|
this.sURL = sURL; {H+?DMh
this.nStartPos = nStart; BkZ%0rw%
this.nEndPos = nEnd; KncoIw
nThreadID = id; 'j)eqoj
fileAccessI = new FileAccessI(sName,nStartPos);//定位 `2fuV]FW
} E7h}0DX
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public void run() 3QHZC0AY
{ &V:dcJ^Q
while(nStartPos < nEndPos && !bStop) ]czy8n$+
{ )[K3p{4
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try{ U KJY.W!w4
URL url = new URL(sURL); Q]7Q
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); 2DC#PX)i
httpConnection.setRequestProperty("User-Agent","NetFox"); `P5"5N\h
String sProperty = "bytes="+nStartPos+"-"; .~U9*5d
httpConnection.setRequestProperty("RANGE",sProperty); l46F3C|
Utility.log(sProperty); 0/gcSW
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InputStream input = httpConnection.getInputStream(); ~/x42|t
//logResponseHead(httpConnection); /<
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byte[] b = new byte[1024]; VxFy[rP
int nRead; ``<1Lo@
while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) ^"l$p,P+
{ Qm.kXlsDI
nStartPos += fileAccessI.write(b,0,nRead); 0\#Q;Z2
//if(nThreadID == 1) @
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// Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); `@eH4}L*
} (
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Utility.log("Thread " + nThreadID + " is over!"); 9vbh5xX
bDownOver = true; 7xc<vl#:q7
//nPos = fileAccessI.write (b,0,nRead); Xdq,
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} *YtNt5u
catch(Exception e){e.printStackTrace ();} B~NC
} ~/U0S.C
} dc>y7$2
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//打印回应的头信息 :65HMWy.
public void logResponseHead(HttpURLConnection con) f$>orVm%.
{
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for(int i=1;;i++) cBI)?
{ %8L<KJd
String header=con.getHeaderFieldKey(i); 0uz"}v)
if(header!=null) Rpk`fxAO
//responseHeaders.put(header,httpConnection.getHeaderField(header)); `"H?nf0
Utility.log(header+" : "+con.getHeaderField(header)); Ds87#/Yfv
else rxK0<pWJhx
break; QC4T=E]`j
} Vi#im`@
} '| }}og
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public void splitterStop() ]K7 64}
{
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bStop = true; +*J4q5;E[?
} c2^7"`
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} I{zE73
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/* MI(i%$R-A
**FileAccess.java 5G!U'.gr
*//文件访问(定位,写) f4S@lyYF
package NetFox; {{3H\
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import java.io.*; S7a6ntei
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public class FileAccessI implements Serializable{ kkBU<L2
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//RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 @'*#]YU8
RandomAccessFile oSavedFile; CLfb`rF
long nPos; !)3s <{k#
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public FileAccessI() throws IOException UWp8I)p!\O
{ l _O~v?
this("",0); DH9?2)aR
} ~Ls I<z
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public FileAccessI(String sName,long nPos) throws IOException xD#I&.
{ o'7ju~0L
oSavedFile = new RandomAccessFile(sName,"rw"); ;CMC`h9,
this.nPos = nPos; 23$hwr&G\
oSavedFile.seek(nPos); |u"R(7N*
} #>jH[Q
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public synchronized int write(byte[] b,int nStart,int nLen) pMp9O/u%
{ 3Z:!o$
int n = -1; htYrv5q=M
try{ j{R|]SjW2H
oSavedFile.write(b,nStart,nLen); |/^aLj^u
n = nLen; 1vs>2` DLa
} WlQ=CRY
catch(IOException e) Kw0V4UF
{ 0~b6wuFl
e.printStackTrace (); !7`=rT&