/* 8%JxXtWW`
**SiteFileFetch.java o7VNw8Bp
*/ 1Nx.aji
package NetFox; boo,KhW'Y
import java.io.*; ~c[}%Ir>
import java.net.*; "s2?cQv{#
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public class SiteFileFetch extends Thread { vP&dvAUF
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SiteInfoBean siteInfoBean = null; //文件信息Bean i0,{*LD%^
long[] nStartPos; //开始位置 FCQoz"M
long[] nEndPos; //结束位置 -h*Yd)
FileSplitterFetch[] fileSplitterFetch; //子线程对象 <Hhl=6op
long nFileLength; //文件长度 AL! ^1hCF
boolean bFirst = true; //是否第一次取文件 lDV8<
boolean bStop = false; //停止标志 FQB)rxP
File tmpFile; //文件下载的临时信息 `LH!"M
DataOutputStream output; //输出到文件的输出流 sW+YfJT
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//负责整个文件的抓取,控制内部线程(FileSplitterFetch类) k);z}`7
public SiteFileFetch(SiteInfoBean bean) throws IOException y&9S+
{ 'T7JXV5
siteInfoBean = bean; >5wA B
//tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); KM4w{
tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); KSVIX!EsX
if(tmpFile.exists ()) O+`^]D7
{ F}0QocD
bFirst = false; %cO;{og M
read_nPos(); - t4"BD
} ?1 r@r
else PqPLy
{ qyUcjc%[
nStartPos = new long[bean.getNSplitter()]; l7aGo1TcIh
nEndPos = new long[bean.getNSplitter()]; NmST1pMk
} FR0zK=\
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} @S?.`o
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public void run() )&+_T+\
{ !W^2?pqN
//获得文件长度 E{T\51V]%
//分割文件 cAyR)Y!I
//实例FileSplitterFetch k(=\&T
//启动FileSplitterFetch线程 0o At=S
//等待子线程返回 FO_nS
try{ j6Jz
if(bFirst) |{PQ0DS
{ `m3@mJ!>\
nFileLength = getFileSize(); ="@W)"r
if(nFileLength == -1) Ou2H~3^PL
{ eN/sW!:P|
System.err.println("File Length is not known!"); z(.$>O&6H
} ?MKf=!w
else if(nFileLength == -2) huvg'Yt
{ 68FxM#xR
System.err.println("File is not access!"); .~v~~VL1NS
} rctn0*MP
else |r}%AN6+
{ Ep 5lmzg
for(int i=0;i<nStartPos.length;i++) k%hD<_:p
{ C$*`c6R
nStartPos = (long)(i*(nFileLength/nStartPos.length)); Zt lS*id_
} `6~*kCj5
for(int i=0;i<nEndPos.length-1;i++) pC8(>gV<h
{ (ZShh y8g
nEndPos = nStartPos[i+1]; v^@L?{"}8
} W U<#_by
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nEndPos[nEndPos.length-1] = nFileLength; {6 #3`
} {!N4|
} <g*rTqT'
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//启动子线程 W**=X\"'
fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; LWVO%@)w
for(int i=0;i<nStartPos.length;i++) Lj~lfO
{ 7e8hnTzl8<
fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), <(f4#BP
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), _'I9rGlx3
nStartPos,nEndPos,i); ~%<PEl|
Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); jb7=1OPD_
fileSplitterFetch.start(); ]m4LY.SQ
} Phb<##OB
// fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), 6:B5PJq
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); MO _9Yi
// Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", dtF6IdAf
nEndPos = " + nFileLength); b%oma{I=.c
// fileSplitterFetch[nPos.length-1].start(); E32z(:7M
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//等待子线程结束 :+R5"my
//int count = 0; spl*[ d
//是否结束while循环 Xrz0ch
boolean breakWhile = false; %1=W#jz
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while(!bStop) wR;l"*j
{ Z(<ul<?r
write_nPos(); gIRCJ=e[b
Utility.sleep(500); ,7QnZ=F
breakWhile = true; 3R{-\ZMd
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for(int i=0;i<nStartPos.length;i++) #zy%B
{ |hdh4P$+|
if(!fileSplitterFetch.bDownOver) "|Pl(HX
{ ^#=L?e
breakWhile = false; kEXcEF_9P
break; HhpP}9P;
} \;?\@vo<
} )T4L^^`
if(breakWhile) Gt1Up~\s
break; !e7vc[N
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//count++; 1z`,*eD7
//if(count>4) D3K`b4YV
// siteStop(); <N*>9S,}
} =3T?U_u@
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System.err.println("文件下载结束!"); C{ti>'"V
} GmHsO/
catch(Exception e){e.printStackTrace ();} oF>GWstTR
} {Q-U=me\
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//获得文件长度 wiGwN
public long getFileSize() yjr@v!o
{ KF'M4P
int nFileLength = -1; N<{`n;
try{ 3(&.[o
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URL url = new URL(siteInfoBean.getSSiteURL()); H|Nw)*.
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); M'HOw)U
httpConnection.setRequestProperty("User-Agent","NetFox"); <2Q@^
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int responseCode=httpConnection.getResponseCode(); WAa?$"U2
if(responseCode>=400) p3S c4
{ y(dS1.5F
processErrorCode(responseCode); Wk|z\OR(
return -2; //-2 represent access is error |W <:rT
} vh HMxOZ;
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String sHeader; f+920/>!Z
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for(int i=1;;i++) 2{CSH_"Z7
{ 9yh@_~rZ
//DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); v2{O67j}
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//Utility.log(in.readLine()); Wa(S20yF
sHeader=httpConnection.getHeaderFieldKey(i); [*G2wP[$
if(sHeader!=null) X W)A~wPBs
{ gp HwiFc
if(sHeader.equals("Content-Length")) Q8x{V_Pot
{ 4I*Mc%dD
nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); !`_f\
break; wDO5Zew!
} }#8uXA
} 50&F#v%YB
else b..$5
break; ^WD$
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} _zh5KP[{
} \2pFFVT
catch(IOException e){e.printStackTrace ();} L_mqC(vn
catch(Exception e){e.printStackTrace ();} =LxmzQO#
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Utility.log(nFileLength); m;f?}z_\$
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return nFileLength; bFezTl{M
} ~ fEs!hl
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//保存下载信息(文件指针位置) suFOc
private void write_nPos() AJfi,rFPg
{ )V3(nZY
try{ b:Kw_Q
output = new DataOutputStream(new FileOutputStream(tmpFile)); 2nkj;x{H$
output.writeInt(nStartPos.length); ACO4u<M)
for(int i=0;i<nStartPos.length;i++) *\KvcRMGUa
{ WG
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// output.writeLong(nPos); %D(prA_w
output.writeLong(fileSplitterFetch.nStartPos); ]A$^ l,
output.writeLong(fileSplitterFetch.nEndPos); 1lyOp
} ,'CWt]OS'
output.close(); o?K|[gNi
} 9jGuelwN
catch(IOException e){e.printStackTrace ();} Nu/Qa:H_{
catch(Exception e){e.printStackTrace ();} C'/M/|=Q#
} /Jf`x>eiH
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//读取保存的下载信息(文件指针位置) b+].Uc
private void read_nPos() c4>sE[]
{ '$h@
try{ w2N3+Tkg
DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); xPMyG);
int nCount = input.readInt(); R P:F<`DB|
nStartPos = new long[nCount]; (1AA;)`Kp
nEndPos = new long[nCount]; Ge:-|*F
for(int i=0;i<nStartPos.length;i++) }
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{ YD46Z~$
nStartPos = input.readLong(); `bZU&A(`Be
nEndPos = input.readLong(); uxC
} ]Uu(OI<)
input.close(); (Ef2
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} 8#]7`o
catch(IOException e){e.printStackTrace ();} 4ZJT[zi
catch(Exception e){e.printStackTrace ();} TdP{{&'9
} ~"q,<t
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private void processErrorCode(int nErrorCode) / }XsuH
{ VyoE5o
System.err.println("Error Code : " + nErrorCode); YKe0:cWc
} $]%<r?MUb-
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//停止文件下载 E]H
public void siteStop() c[h'`KXJf-
{ I#S~
bStop = true; ]~\SR0
for(int i=0;i<nStartPos.length;i++) yxC Ml.
fileSplitterFetch.splitterStop(); k?["F%)I
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} sm2p$3v
} !#c[~erNZ
//负责部分文件的抓取 =nvAOvP{?
**FileSplitterFetch.java iM/*&O}
*/ r%y;8$/-
package NetFox; 68p\WheCal
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import java.io.*; MdVCD^B
import java.net.*; 'HQ7
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public class FileSplitterFetch extends Thread { V#gF*]q
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String sURL; //File URL iHE0N6%q
long nStartPos; //File Snippet Start Position POqRHuFq
long nEndPos; //File Snippet End Position ]]J#7L#
int nThreadID; //Thread's ID 'R4>CZ%jV
boolean bDownOver = false; //Downing is over t+=1 2{9;f
boolean bStop = false; //Stop identical y:g7'+c
FileAccessI fileAccessI = null; //File Access interface T6h;Y
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public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException ,J~,ga~
{ tC2 )j7@
this.sURL = sURL; WFU?o[k-O
this.nStartPos = nStart; 5i!V}hE
this.nEndPos = nEnd; vp\PYg;x
nThreadID = id; pu/m8
fileAccessI = new FileAccessI(sName,nStartPos);//定位 v!<PDw2'
} M1AZ}bc0]
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public void run() )"(V*Z
{ c;c:Ea5
while(nStartPos < nEndPos && !bStop) x @1px&^
{ 5TXg;v#Z
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try{ Ey r5jXt%;
URL url = new URL(sURL); 0zeUP{MQ
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); b%Wd<N2
httpConnection.setRequestProperty("User-Agent","NetFox"); [ 3$.*
String sProperty = "bytes="+nStartPos+"-"; M*d-z
httpConnection.setRequestProperty("RANGE",sProperty); L7SEswMti
Utility.log(sProperty); )-0[ra]
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InputStream input = httpConnection.getInputStream(); "#*Nnt
//logResponseHead(httpConnection); 0-*Z<cu%l
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byte[] b = new byte[1024]; 3H1Pp*PH
int nRead; E;9Z\?P
while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) 'eqiYY|
{ ,/~[S
nStartPos += fileAccessI.write(b,0,nRead); O[; +i
//if(nThreadID == 1) 6dF$?I&
// Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); ;!'qtw"CB
} ows^W8-w
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Utility.log("Thread " + nThreadID + " is over!"); &kb\,mQ
bDownOver = true; mRCHrw?WG
//nPos = fileAccessI.write (b,0,nRead); F#6cF=};@
} ?p(kh^ z
catch(Exception e){e.printStackTrace ();} /4yOs@#
} H \ 3M
} pP3U,n
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//打印回应的头信息 F@9Y\. ,
public void logResponseHead(HttpURLConnection con) +Z > <
{ T0r<O_ubOA
for(int i=1;;i++) w5,6$#
{ U M@naU
String header=con.getHeaderFieldKey(i); /M:H9Z8!
if(header!=null) \4aKLr
//responseHeaders.put(header,httpConnection.getHeaderField(header)); N*f^Z#B]
Utility.log(header+" : "+con.getHeaderField(header)); L.kD,'G}>
else .?f:Nb.O
break; ^+M><jE9
} u)7*Rj^
} e[}],W
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public void splitterStop() $:e)$Xnn-
{ x:qr \Rz
bStop = true; mY`@'
} 9Fk4|+OJ
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} Wk}D]o0^@
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/* dhW<p5
**FileAccess.java .liyC~YW
*//文件访问(定位,写) l~['[Ub0)
package NetFox; Jh?z=JY
import java.io.*; x<@kjfm5
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public class FileAccessI implements Serializable{ 5qRc4d'
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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 yb?{LL-uy
RandomAccessFile oSavedFile; U*qNix
long nPos; J\{$ot
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public FileAccessI() throws IOException ?q!FG(
{ zKxvN3!
this("",0); \?&Au
} bDWeU}
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public FileAccessI(String sName,long nPos) throws IOException LN^UC$[tk
{ q^*6C[G B
oSavedFile = new RandomAccessFile(sName,"rw"); ~{M@?8wi
this.nPos = nPos;
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oSavedFile.seek(nPos); N_G4_12(
} ax_YKJ5#P
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public synchronized int write(byte[] b,int nStart,int nLen) ],[)uTZc
{ Obo _YE
int n = -1; 94{)"w]
try{ s4$X
oSavedFile.write(b,nStart,nLen); T4r5s
n = nLen; :}9j^}"c3
} sx5r(0Z
catch(IOException e) kXwi{P3D$
{ =IHje;s
e.printStackTrace (); 3wC
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} hD
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return n; b/<mRQ{
} R#qI(V
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} 73
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/* _]|Qec)
**SiteInfoBean.java <m-.aK{9
*/ y
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package NetFox; D.*>;5:0'
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public class SiteInfoBean { ?`AGF%zp
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private String sSiteURL; //Site's URL ]V<-J
private String sFilePath; //Saved File's Path 8_xLl2
private String sFileName; //Saved File's Name /P+q}L%
private int nSplitter; //Count of Splited Downloading File aB"xqh)a}T
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public SiteInfoBean() KcXpH]>!9
{//nSplitter的缺省值为5 v01#>,R
//default value of nSplitter is 5 :a3xvN-l
this("","","",5); S "
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} GGnp Pp
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public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) ;>ozEh#8w
{ x(~<