/* d:&=|kKw
**SiteFileFetch.java VlbS\Y.
*/ NG\g_^.M
package NetFox; !Sj0! \
import java.io.*; LEn+0^hX
import java.net.*; }T1.~E
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public class SiteFileFetch extends Thread { 5!V%0EQqw
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SiteInfoBean siteInfoBean = null; //文件信息Bean efUa[XO
long[] nStartPos; //开始位置 (JI[y"2
long[] nEndPos; //结束位置 <%ba
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FileSplitterFetch[] fileSplitterFetch; //子线程对象 Zog&:]P'F
long nFileLength; //文件长度 kC8M2 |L
boolean bFirst = true; //是否第一次取文件 6i7+.#s
boolean bStop = false; //停止标志 Je &O
File tmpFile; //文件下载的临时信息 h*B7UzCg
DataOutputStream output; //输出到文件的输出流 >HL$=J_K?
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//负责整个文件的抓取,控制内部线程(FileSplitterFetch类) j[Z<|Da
public SiteFileFetch(SiteInfoBean bean) throws IOException p"tCMB
{ Zp qb0ro
siteInfoBean = bean; \6L,jSoBl
//tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); /#-zI#iK
tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); +rWcfXOHM
if(tmpFile.exists ()) ]@wKm1%v
{ G;he:Bf
bFirst = false; P0<)E
read_nPos(); a1
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} r(OH
else q#_<J1)z
{ 4`zK`bRcK#
nStartPos = new long[bean.getNSplitter()]; PfjD!=yS=h
nEndPos = new long[bean.getNSplitter()]; Lu5lpeSQ
} ~jD~_JGp
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} ,R[<+!RS
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public void run() WGA"e
{ $Y?[[>u
//获得文件长度 S5/p3;O\c
//分割文件 TH>7XK<90M
//实例FileSplitterFetch 0lLg uBW@
//启动FileSplitterFetch线程 *3# RS
//等待子线程返回 -GODM128 ^
try{ [vn"r^P
if(bFirst) w~ O)DhC
{ k2:mIp\
nFileLength = getFileSize(); siz:YRur
if(nFileLength == -1) U[G5<&Z^
{ q854k+C
System.err.println("File Length is not known!"); C:ntr=3J
} @r]1;KG
else if(nFileLength == -2) 1EQLsg`d^
{ HE@P<
System.err.println("File is not access!"); ZO&F15$P
} Sh(XFUJ
else qdxDR
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{ Lm7fz9F%
for(int i=0;i<nStartPos.length;i++) kb[+II
{ '@f#GNRT
nStartPos = (long)(i*(nFileLength/nStartPos.length)); 4\y>pXML-U
} ofuQ`g1hb
for(int i=0;i<nEndPos.length-1;i++) J5SOPG
{ 3Gt@Fo=
nEndPos = nStartPos[i+1]; rq|>z .
} 9d8U@=
nEndPos[nEndPos.length-1] = nFileLength; ]~7xq)28
} uO4R5F|tL
} kY#sQz}8
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//启动子线程 Nrzg>WQa
fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; Y|L]#
for(int i=0;i<nStartPos.length;i++) W <M\b#
{ `g'z6~c7n
fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), [t"#4[
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), QA#Jx
nStartPos,nEndPos,i); w%eEj.MI|i
Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); $}.#0c8I
fileSplitterFetch.start(); w"OeS;#e:
} 7vEZb.~4z
// fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), .`+N+B(4
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); X_#,5t=7
// Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", +A<7:`sO
nEndPos = " + nFileLength); <v$yXA
// fileSplitterFetch[nPos.length-1].start(); ;w^{PZBg
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//等待子线程结束 &u0on)E
//int count = 0; g/OL^A
//是否结束while循环 ;\gHFG}
boolean breakWhile = false; S/Gy:GIf
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while(!bStop) B2)SNhF2Y
{ ~%u;lr
write_nPos(); 7_ao?}g
Utility.sleep(500); |"k+j_/+
breakWhile = true; z>O =. Ku6
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for(int i=0;i<nStartPos.length;i++) (zhi/>suG
{ wj|[a,(r
if(!fileSplitterFetch.bDownOver) 'L ]k\GO
{ uOQl;}Lk5
breakWhile = false; Y1L7s H 9
break; @ \JoICz
} n]snD1?KX
} IGcYPL\&
if(breakWhile) j4!oBSp
break; dS~#Lzm
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//count++; k+y>xI,
//if(count>4) 1|3{.Ed
// siteStop(); afj[HJbY
} ~"i4"Op&
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System.err.println("文件下载结束!"); KPB^>,T2{
} ^HI}bS1+|
catch(Exception e){e.printStackTrace ();} [E4#|w
} h-=lZ~W~
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//获得文件长度 Q*l_QnfG
public long getFileSize() 9{XC9\~
{ br_D
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int nFileLength = -1; zIh`Vw ,t0
try{ ^{w]r5d
URL url = new URL(siteInfoBean.getSSiteURL()); 6qkMB|@Ix
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); Tq`rc"&7u
httpConnection.setRequestProperty("User-Agent","NetFox"); P xiJ R[a
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int responseCode=httpConnection.getResponseCode();
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if(responseCode>=400) $ru()/pI)z
{ |%xgob
processErrorCode(responseCode); ^E`SR6_cmj
return -2; //-2 represent access is error k\`~v$R3
} C6cEt5
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String sHeader; (2fWJ% 7VG
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for(int i=1;;i++) y?*4SLy
{ *='J>z.]
//DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); v6q oH)n
//Utility.log(in.readLine()); ^P
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sHeader=httpConnection.getHeaderFieldKey(i); w5tcO%+k1
if(sHeader!=null) k x26nDT(
{ MeXGE
if(sHeader.equals("Content-Length")) -VVJf5/
{ sAec*Q(R
nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); K:\db'``
break; N5\]VCX
} }:2GD0Ru
} smTPca)7s
else
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break; WfF~\DlrD
} 896oz>
} #`(-Oj2hH
catch(IOException e){e.printStackTrace ();} C`LHFqv
catch(Exception e){e.printStackTrace ();} c. ;}e:)s
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Utility.log(nFileLength); N,M[Opm
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return nFileLength; 0M_~@E*&
} oYn|>`+6:y
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//保存下载信息(文件指针位置) 3+>;$
private void write_nPos() ?f\ ~:Gm/
{ 48 n5Y~YS
try{ #'&&&_Hu3
output = new DataOutputStream(new FileOutputStream(tmpFile)); zm7IkYF
output.writeInt(nStartPos.length); )J<VDO:_YA
for(int i=0;i<nStartPos.length;i++) ta'{S=^j
{ 6b6rM%B.oD
// output.writeLong(nPos); `: R7jf
output.writeLong(fileSplitterFetch.nStartPos); ]W9 {<+&
output.writeLong(fileSplitterFetch.nEndPos); v3q.,I_
} .Fe_Z)i>h
output.close(); %{*A@jQsg
} n |e=7?H8
catch(IOException e){e.printStackTrace ();} 2YV*U_\L
catch(Exception e){e.printStackTrace ();} 6*uWRjt
} ,N`cH\
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//读取保存的下载信息(文件指针位置) ~p* \|YC
private void read_nPos() Y:-O/X
{ nA)KRCi
try{ $YztLcn
DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); )U5Ba^"fI
int nCount = input.readInt(); L $ki>._i\
nStartPos = new long[nCount]; L63B# H"
nEndPos = new long[nCount]; $ctpg9 7
for(int i=0;i<nStartPos.length;i++) px>g
{ ];63QJU
nStartPos = input.readLong(); Mr6 q7
nEndPos = input.readLong(); (S)jV0
} VTIRkC
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input.close(); XKQ\Ts2<k
} *MM8\p_PuT
catch(IOException e){e.printStackTrace ();} y|Vwy4tK9
catch(Exception e){e.printStackTrace ();} sb"h:i>O4
} 7~
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private void processErrorCode(int nErrorCode) k,0lA#>
{ g3Z"ri~!G
System.err.println("Error Code : " + nErrorCode); U6K!FOND
} t*dd/a
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/)/>/4O
//停止文件下载 7S.E,\Tws
public void siteStop() 7:$zSj#y
{ ]rMHO
bStop = true; 'eDV-cB
for(int i=0;i<nStartPos.length;i++) :211T&B%A_
fileSplitterFetch.splitterStop(); >m'n#=yap
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} hreG5g9{
} sRaTRL2
//负责部分文件的抓取 </-aG[Fi
**FileSplitterFetch.java ibL
*/ XZH\HK)K-]
package NetFox; Q8?:L<A
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import java.io.*; rfHAz
import java.net.*; F$nc9x[S
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public class FileSplitterFetch extends Thread { =QJI_veUG`
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String sURL; //File URL _,bDv`>Ra
long nStartPos; //File Snippet Start Position 'Fr"96C$
long nEndPos; //File Snippet End Position w7`09oJm
int nThreadID; //Thread's ID \Jm^XXgS
boolean bDownOver = false; //Downing is over #CTeZ/g
boolean bStop = false; //Stop identical Xcw6mpLt
FileAccessI fileAccessI = null; //File Access interface 'wd&O03&
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public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException xjH({(/B>a
{ [/GCy0jk
this.sURL = sURL; T))F
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this.nStartPos = nStart; "fOxS\er
this.nEndPos = nEnd; g\A kf
nThreadID = id; $9rQ w1#e
fileAccessI = new FileAccessI(sName,nStartPos);//定位 k4+ Q$3"
} Sgq" 3(+%,
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public void run() 7QM1E(cMg
{ Wo+^R%K'4
while(nStartPos < nEndPos && !bStop) q:<vl^<j
{ E@CK.-N|
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try{ 6~tj"34_
URL url = new URL(sURL); gtRVXgI
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); q"Th\? }%
httpConnection.setRequestProperty("User-Agent","NetFox"); P]<15l
String sProperty = "bytes="+nStartPos+"-"; Kdr}7#c
httpConnection.setRequestProperty("RANGE",sProperty); > K s.
Utility.log(sProperty); 3S{3AmKj?
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InputStream input = httpConnection.getInputStream(); V#TNv0&0
//logResponseHead(httpConnection); Xz\ X 8I
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byte[] b = new byte[1024]; "w{$d&+?ag
int nRead; nQ08(8
while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) CS\8ej}y
{ ",P?jgs^g5
nStartPos += fileAccessI.write(b,0,nRead); &}!AjA)
//if(nThreadID == 1) 7=a=@D[
// Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); g>;"Fymc'
} F!zGk(Pu
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Utility.log("Thread " + nThreadID + " is over!"); EL(BXJrx{
bDownOver = true; I|.
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//nPos = fileAccessI.write (b,0,nRead); x\aCZ
} &/8B(0<
catch(Exception e){e.printStackTrace ();} V?"1&m&E
} He1~27+99
} Wn&9R
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//打印回应的头信息 *0x!C8*`Xe
public void logResponseHead(HttpURLConnection con) &"d
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{ JfRqOEP4Y
for(int i=1;;i++) A9y@v{txN
{ %J+k.UrM
String header=con.getHeaderFieldKey(i); &neB$m3y
if(header!=null) L~*nI d
//responseHeaders.put(header,httpConnection.getHeaderField(header)); A u"BDP
Utility.log(header+" : "+con.getHeaderField(header)); 9qm'qx
else J3hhh(
break; 6W9lKD_i
} ';LsEI[
} y\Wp}}
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public void splitterStop() # blh9.V&F
{ @ 1FWBH~
bStop = true; DI[
} HpS1(%d"
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} c=<^pCa9t1
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/* 5")BCA
**FileAccess.java ~*L@|?
*//文件访问(定位,写) S+l>@wa)|
package NetFox; O@>{%u
import java.io.*; z8
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public class FileAccessI implements Serializable{ u?KG%
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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 -v=tM6
RandomAccessFile oSavedFile; Vu,:rPqI
long nPos; ?uXY 6J"
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