/* ?1Vx)j>|
**SiteFileFetch.java <|X+T,
*/ ~UQ<8`@a
package NetFox; #Yp&yi
}
import java.io.*; fO^s4gWTg
import java.net.*; _dCDT$^&r
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public class SiteFileFetch extends Thread { vfx{:3fO
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SiteInfoBean siteInfoBean = null; //文件信息Bean F s=x+8'M
long[] nStartPos; //开始位置 vkR~nIp
long[] nEndPos; //结束位置 {%^4%Eco
FileSplitterFetch[] fileSplitterFetch; //子线程对象 !;[cJbqnh
long nFileLength; //文件长度 |JWYsqJ0U
boolean bFirst = true; //是否第一次取文件 n
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boolean bStop = false; //停止标志 :AqtPV'
File tmpFile; //文件下载的临时信息 DrAIQ7Jd
DataOutputStream output; //输出到文件的输出流 a j
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//负责整个文件的抓取,控制内部线程(FileSplitterFetch类) SAf)#HXa
public SiteFileFetch(SiteInfoBean bean) throws IOException /n>vPJvz
{ G973n
siteInfoBean = bean; *14:^neoI
//tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); -O=xgvh"
tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); Y$c7uA:4
if(tmpFile.exists ()) @]}/vsI m
{ _Ye.29
bFirst = false; P0OMu/
read_nPos(); H]wP\m)
} T3SFG]H
else yENAc sv
{ T;{:a-8
nStartPos = new long[bean.getNSplitter()]; (.YSs
nEndPos = new long[bean.getNSplitter()]; EL z5P}L6
} Ars*H,9>e
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} +\&6Zbn
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public void run() ed_+bCNy
{ 'o0o.&/=
//获得文件长度 yIngenr$
//分割文件 bT
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//实例FileSplitterFetch 6biR5&Y5U&
//启动FileSplitterFetch线程 2$!,$J-<Y
//等待子线程返回 es%py~m)
try{ S<'_{u z
if(bFirst) Q2woCxB
{ Lpkx$QZ
nFileLength = getFileSize(); $XMpC{
if(nFileLength == -1) l=Pw
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{ ,2^A<IwR
System.err.println("File Length is not known!"); JTBt=u{6^
} /z`tI
else if(nFileLength == -2) S0:Oep
{ k&f/f
System.err.println("File is not access!"); ]F>#0Rdc
} eK*oV}U-k
else K4]ZVMm/*
{ 5|Z8UzL
for(int i=0;i<nStartPos.length;i++) F!/-2u5gF
{ *HGhm04F{
nStartPos = (long)(i*(nFileLength/nStartPos.length)); v+79#qWK|n
} c9CFGo?)N
for(int i=0;i<nEndPos.length-1;i++) '
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{ o.Y6(o
nEndPos = nStartPos[i+1]; CH|cK8q
} 5M5vxJ)Lh
nEndPos[nEndPos.length-1] = nFileLength; |/%5~=%7
} fB,eeT1v?h
} $ywROa]
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//启动子线程 |r)QkxdU,
fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; V,'_BUl+x
for(int i=0;i<nStartPos.length;i++) l`:u5\ rM
{ 1ZYo-a;)
fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), T:2f*!r
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), 3k(tv U+eC
nStartPos,nEndPos,i); ?K2}<H-
Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); cTRtMk%^
fileSplitterFetch.start(); QUvSeNSp
} %N(>B_t\
// fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), #9.%>1{6Y
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); t?Qbi)T=z
// Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", uW FyI"
nEndPos = " + nFileLength); ;PU'"MeB "
// fileSplitterFetch[nPos.length-1].start(); _FcTY5."S
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//等待子线程结束 xaoR\H
//int count = 0; (&r`
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//是否结束while循环 [UC_
boolean breakWhile = false; Iu`S0#+
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while(!bStop) v#<{Y'K
{ xVX:kDX
write_nPos(); 7I&o
Utility.sleep(500); 7l=Tl[n
breakWhile = true; IO=$+c
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for(int i=0;i<nStartPos.length;i++) =2QP7W3mg<
{ fR {_P
if(!fileSplitterFetch.bDownOver) 7ZyP
{ r7R.dD/.
breakWhile = false; R4JfH
break; &nI>`Q'
} Qo^(r$BD
} I_Gz~ qk6
if(breakWhile) mD&I6F[s
break; %eIaH!x:
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//count++; $M!iQ"bb
//if(count>4) w4}Q6_0v
// siteStop(); K{`R`SXD
} lA1
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System.err.println("文件下载结束!"); i4h`jFS
} 9%NobT
catch(Exception e){e.printStackTrace ();} IvY3iRq6
} AJ&j|/
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//获得文件长度 (S+/e5c)
public long getFileSize() ?nbu`K6T
{ EQd<!)HZ
int nFileLength = -1; 1ywdcg
try{ 19y,O0# _
URL url = new URL(siteInfoBean.getSSiteURL()); 3#dz6+
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); C#yRop_d]o
httpConnection.setRequestProperty("User-Agent","NetFox"); FBB<1( {A
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int responseCode=httpConnection.getResponseCode(); E"S#d&9
if(responseCode>=400) |o9`h 9i
{ u7RlxA:
processErrorCode(responseCode); sP2Uj
return -2; //-2 represent access is error ZS(%!+ M
} W}3%BWn
} eHxw+.
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String sHeader; <rK[ &JlJ
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for(int i=1;;i++) }d>.Nj#zh
{ QKq4kAaJ!
//DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); |%ZJN{!R
//Utility.log(in.readLine()); :3D6OBkB
sHeader=httpConnection.getHeaderFieldKey(i); &QW&K
if(sHeader!=null) _6r[msH"
{ 9s[
if(sHeader.equals("Content-Length")) 0!ZaR6
{ `O0Qtq.
nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); c^pQitPv
break; "Ueq
} _,aFQ^]'9
} P!IA;i
else ob2_=hQnC
break; 6D2ot&5WW
} +75"Q:I
} .[1 f$
catch(IOException e){e.printStackTrace ();} D&uaA-;s
catch(Exception e){e.printStackTrace ();} &S66M2
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Utility.log(nFileLength); oQmXKV+[v
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return nFileLength; )8#-IXxp
} #5{xWMp/0
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//保存下载信息(文件指针位置) X`WS&!C<
private void write_nPos() \mJR^t
{ ~1}fL 1~5
try{ j$/#2%OVN
output = new DataOutputStream(new FileOutputStream(tmpFile)); $t}W,?
output.writeInt(nStartPos.length); (}>)X]
for(int i=0;i<nStartPos.length;i++) <8kCmuGlk
{ LAlX|b
// output.writeLong(nPos); >Ovz;
output.writeLong(fileSplitterFetch.nStartPos); %$Py @g
output.writeLong(fileSplitterFetch.nEndPos); H'/V<%
} /j$pV
output.close(); @sZ7Ka
} X@tA+
catch(IOException e){e.printStackTrace ();} F
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catch(Exception e){e.printStackTrace ();} ocK4Nxs
} ]S@T|08b
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//读取保存的下载信息(文件指针位置) lemV&$WN|
private void read_nPos() XXA'B{@Y)
{ 9e>2kd
try{ 3gVU#T[[
DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); +2 oZML
int nCount = input.readInt(); cl&?'`
)
nStartPos = new long[nCount]; ~uZ9%UB_m
nEndPos = new long[nCount]; _xi&%F/
for(int i=0;i<nStartPos.length;i++) j#P4&
{ OAW_c.)5D
nStartPos = input.readLong(); B]<N7NYn1
nEndPos = input.readLong(); =FIZh}JD
} HDzeotD
input.close(); @jMo/kO/A
} -X7x~x-
catch(IOException e){e.printStackTrace ();} uaKbqX
catch(Exception e){e.printStackTrace ();} V(0Y
} `RE>gX
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private void processErrorCode(int nErrorCode) BxlhCu
{ PHIc7*_
System.err.println("Error Code : " + nErrorCode); *?uUP
} ;'V[8`Z@
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//停止文件下载 Ti0kfjhX7
public void siteStop() !.O[@A\.-
{ K,|3?CjS
bStop = true; GIpYx`mHi
for(int i=0;i<nStartPos.length;i++) y&8`NS#_p?
fileSplitterFetch.splitterStop(); -@#],s7
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} V?x&\<;,
} A&v Qtd
//负责部分文件的抓取 9IG<9uj
**FileSplitterFetch.java (0LA.aBIf
*/ 'sa)_?Hy
package NetFox; #Y-_kQV*
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import java.io.*; {6qxg _{
import java.net.*; :PY8)39@K
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public class FileSplitterFetch extends Thread { @zi0:3`#0\
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String sURL; //File URL ,H/O"%OJ
long nStartPos; //File Snippet Start Position rOEBL|P0
long nEndPos; //File Snippet End Position z4(\yx
int nThreadID; //Thread's ID Yqo @
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boolean bDownOver = false; //Downing is over r<srTHGLo
boolean bStop = false; //Stop identical ^*$!9~
FileAccessI fileAccessI = null; //File Access interface IV':sNV
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public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException zIS ,N '
{ 06.8m;{N
this.sURL = sURL; w^nA/=;r
this.nStartPos = nStart; `VGw5o
this.nEndPos = nEnd; Th\T$T`X$
nThreadID = id; '4u/ g
fileAccessI = new FileAccessI(sName,nStartPos);//定位 &X`
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} d*k5h<jM
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public void run() oVbs^sbRH
{ A(`Mwh+
while(nStartPos < nEndPos && !bStop) |+sAqx1IF
{ p}gA8o
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try{ 5i'?oXL
URL url = new URL(sURL); L5KcI
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); KY%qzq,n
httpConnection.setRequestProperty("User-Agent","NetFox"); a#CjGj)
String sProperty = "bytes="+nStartPos+"-"; Ow5VBw(
httpConnection.setRequestProperty("RANGE",sProperty); ?g@X+!RB
Utility.log(sProperty); =<aFkBX-
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InputStream input = httpConnection.getInputStream(); })uyq_nz
//logResponseHead(httpConnection); t&5 Ne ?
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byte[] b = new byte[1024]; ""N~##)8
int nRead; 0/7.RpX,.
while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) u`(yT<>H
{ $*_79F2zN
nStartPos += fileAccessI.write(b,0,nRead); ObreDv^,
//if(nThreadID == 1) \{a5]G(4s
// Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); Wk/Q~o
} &><b/,]
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Utility.log("Thread " + nThreadID + " is over!"); 1LvR,V<