/* [ME}Cv`?<E
**SiteFileFetch.java dSOlD/c
*/ I#|ocz
package NetFox; .q0218l:dF
import java.io.*; w`c0a&7
import java.net.*; \4h>2y
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public class SiteFileFetch extends Thread { @gt)P4yE
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SiteInfoBean siteInfoBean = null; //文件信息Bean [_y9"MMwn
long[] nStartPos; //开始位置 .UM<a
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long[] nEndPos; //结束位置 "s F Xl
FileSplitterFetch[] fileSplitterFetch; //子线程对象 LXHwX*`Y
long nFileLength; //文件长度 7"ylN"syZ
boolean bFirst = true; //是否第一次取文件 ,M\j%3
boolean bStop = false; //停止标志 J0^{,eY<
File tmpFile; //文件下载的临时信息 cPpu
DataOutputStream output; //输出到文件的输出流 5cD
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//负责整个文件的抓取,控制内部线程(FileSplitterFetch类) n?'d|h
public SiteFileFetch(SiteInfoBean bean) throws IOException &EAk
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{ [096CK
siteInfoBean = bean; ]>tq|R78
//tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); ;yF[2P ;
tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); 0o=!j3RjH
if(tmpFile.exists ()) FE/$(7rM
{ z>4D~HX
bFirst = false; F\>oxttS1
read_nPos(); ZlthYuJ
} K!3{M!B
else Y)$52m5rM
{ QJx9I_
nStartPos = new long[bean.getNSplitter()]; MV%Xhfk
nEndPos = new long[bean.getNSplitter()]; )-=2w-ZX
} {mNdL J
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} \% }raI;Y@
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public void run() >@^<S_KVh
{ RnHQq'J|\
//获得文件长度 hlX>K
//分割文件 ($c`s8mp
//实例FileSplitterFetch |y.zocBj
//启动FileSplitterFetch线程 r=h8oUNEJ*
//等待子线程返回 K!GUv{fp
try{ Z[Wlyb0
if(bFirst) |5W8Q|>%
{ Yt -W1vl
nFileLength = getFileSize(); @4;&hP2Z:
if(nFileLength == -1) @gNpJB]V
{ h~ $&
System.err.println("File Length is not known!"); K}
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} {5>3;.
else if(nFileLength == -2) -
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{ r,5-XB
System.err.println("File is not access!"); 7'Lp8
} aC`Li^
else Bb~5& @M|N
{ d+tj%7
for(int i=0;i<nStartPos.length;i++) ji}#MBac
{ ASR-a't6
nStartPos = (long)(i*(nFileLength/nStartPos.length)); d7E7f
} djUihcqA`
for(int i=0;i<nEndPos.length-1;i++) *2`:VFEV
{ ^%;" [r
nEndPos = nStartPos[i+1]; ?4,@,
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} 5? Wg%@
nEndPos[nEndPos.length-1] = nFileLength; s}wO7Df=+
} :AZp}
} rsWQHHkO
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//启动子线程 ^]VcxKU J
fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; h6g:(3t6m
for(int i=0;i<nStartPos.length;i++) L/BHexOB
{ !}ilN 1>
fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), P@C
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siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), zhX;6= X2
nStartPos,nEndPos,i); 0C]4~F x~
Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); _
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fileSplitterFetch.start(); K5{{:NR$
} QP:9%f>=
// fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), Rb#/qkk/
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); `$at9
// Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", mf}\s]_c
nEndPos = " + nFileLength); AP0|z
// fileSplitterFetch[nPos.length-1].start(); I] jX7.fx
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//等待子线程结束 &3I$8v|!?
//int count = 0; usy,V"{
//是否结束while循环 UeA2c_
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boolean breakWhile = false; zj{(p Z1
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while(!bStop) uoHqL IpQ
{ .U 39nd
write_nPos(); eES'}[W>
Utility.sleep(500); as(*B-_n~
breakWhile = true; jn^fgH?
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for(int i=0;i<nStartPos.length;i++) !Av1Leb9$
{ >yKpM }6l{
if(!fileSplitterFetch.bDownOver) EL7T'zJ$
{ .a,(pq Jg
breakWhile = false; F$h'p4$T
break; &$F[/[Ds+
} @0|nq9l1
} !lhFKb;
if(breakWhile) <GaT|Hhc=
break; kon5+g9q
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//count++; 4[1k\
//if(count>4) lUHtjr
// siteStop(); vL$|9|W(
}
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System.err.println("文件下载结束!"); zmb@*/fK
} E?Cj/o
catch(Exception e){e.printStackTrace ();} J)*8|E9P
} :_Fxy5}
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//获得文件长度 ufPCx|x~
public long getFileSize() H* /&A9("
{ <Y>3
int nFileLength = -1; ,eXFN?CB
try{ (@q3^)I4
URL url = new URL(siteInfoBean.getSSiteURL()); 1~@|eWr|
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); )~}PgbZ^
httpConnection.setRequestProperty("User-Agent","NetFox"); +9zA^0
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int responseCode=httpConnection.getResponseCode(); p+[}Hxx=
if(responseCode>=400) u s`}
{ U
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processErrorCode(responseCode); HN68!v}C|
return -2; //-2 represent access is error ;&kn"b}G;
} iNJAZ6@+
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String sHeader; qlUzr.^-
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for(int i=1;;i++) h<Wg 3o
{ ,QvYTJ{
//DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); F7T E|LZ
//Utility.log(in.readLine()); ]fE3s{y
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sHeader=httpConnection.getHeaderFieldKey(i); p=B?/Sqa
if(sHeader!=null) y(v_-6b
{ -B9S}NPo
if(sHeader.equals("Content-Length")) q-
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{ a#y{pT2 b
nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); dB3N%pB^
break; 8=F %+
} SF< [FM%1
} "PzP;Br
else DA=1KaJ .
break; B< hEx@
} gxmc|
} oZ:{@=
catch(IOException e){e.printStackTrace ();} =}R~0|^
catch(Exception e){e.printStackTrace ();} W:O0}
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Utility.log(nFileLength); s$GF 95^
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return nFileLength; C:GvP>
} fxtxu?A>
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//保存下载信息(文件指针位置)
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private void write_nPos() }OrYpZob
{ /DO'IHC.o
try{ Rla4L`X;
output = new DataOutputStream(new FileOutputStream(tmpFile)); kcS6 _l
output.writeInt(nStartPos.length); 3LW[H+k
for(int i=0;i<nStartPos.length;i++) *jF#^=
{ U$'y_}V
// output.writeLong(nPos); !O{z 3W
output.writeLong(fileSplitterFetch.nStartPos); <HQ&-j x
output.writeLong(fileSplitterFetch.nEndPos); T//S,
} Df@/cT
output.close(); yvxl_*Ds8
} |scUo~
catch(IOException e){e.printStackTrace ();} |ym%|
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catch(Exception e){e.printStackTrace ();} H/J<Pd$p
} U3F3((EYJ
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//读取保存的下载信息(文件指针位置) )ooWQ-%P
private void read_nPos() "H1:0p
{ W-D[z#)/Y
try{ QlD6i-a
DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); ~lw<799F6
int nCount = input.readInt(); U9#WN.noG
nStartPos = new long[nCount]; 5AOfp2O
nEndPos = new long[nCount]; 2OalAY6RS
for(int i=0;i<nStartPos.length;i++) J#7y<
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{ @!\K>G >9[
nStartPos = input.readLong(); -0 0}if7
nEndPos = input.readLong(); !kXeO6X@m
} G9RP^
input.close(); IKcKRw/O$
} ;fGx;D
catch(IOException e){e.printStackTrace ();} U)[ty@zyF
catch(Exception e){e.printStackTrace ();} y $V[_TN
} LC-)'Z9}5
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private void processErrorCode(int nErrorCode) s, XM9h>P4
{ Y8ehmz|g]J
System.err.println("Error Code : " + nErrorCode); ez*jjm
} iP "EA8
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//停止文件下载 H?U't
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public void siteStop() <y>:B}9'
{ )i!^]| $
bStop = true; PayV,8
for(int i=0;i<nStartPos.length;i++) 7>-yaL{
fileSplitterFetch.splitterStop(); %j{.0H
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} k/lFRi-i
} I]uhi{\C
//负责部分文件的抓取 np6HUH
**FileSplitterFetch.java ]}2Ztr)zZ
*/ nY^Nbh0
package NetFox; '[Gm8K5
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import java.io.*; @E_zR
import java.net.*; E
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public class FileSplitterFetch extends Thread { 7GZq|M_:y
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String sURL; //File URL J_xG}d
long nStartPos; //File Snippet Start Position T:!MBWYe |
long nEndPos; //File Snippet End Position 509Q0 [k
int nThreadID; //Thread's ID QnKC#
boolean bDownOver = false; //Downing is over _Bk
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boolean bStop = false; //Stop identical BUC,M:J+H
FileAccessI fileAccessI = null; //File Access interface tWD|qg_
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public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException QzthTX<
{ .>]N+:O
this.sURL = sURL; OVs wt
this.nStartPos = nStart; R^P_{_I*"
this.nEndPos = nEnd; 8$}OS-
nThreadID = id; 'b[0ci:
fileAccessI = new FileAccessI(sName,nStartPos);//定位 #*,sa
} ^7u#30,}3~
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public void run() `WlE|
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{ /f3m)pT
while(nStartPos < nEndPos && !bStop) Alz~-hqQ
{ @ {}rG8
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try{ ' G#SLqZy
URL url = new URL(sURL); A=`*r*
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); <qY5SV,
httpConnection.setRequestProperty("User-Agent","NetFox"); crn k|o
String sProperty = "bytes="+nStartPos+"-"; *fhX*e8y
httpConnection.setRequestProperty("RANGE",sProperty); kO ![X ^V
Utility.log(sProperty); 8H
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InputStream input = httpConnection.getInputStream(); NWKi
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//logResponseHead(httpConnection); :ba/W&-d
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byte[] b = new byte[1024]; 8(A{;9^g
int nRead; Q}P-$X+/ n
while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) "#S>I8d
{ e@jfIF0=}
nStartPos += fileAccessI.write(b,0,nRead); _D-Riu>#J
//if(nThreadID == 1) m6U8)!)T
// Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); s~$zWx@v
} =`p&h}h-L
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Utility.log("Thread " + nThreadID + " is over!"); %f!iHo+Z
bDownOver = true; 7~vqf3ON4J
//nPos = fileAccessI.write (b,0,nRead); ] !Zty[
} f\}22}/
catch(Exception e){e.printStackTrace ();} pFIecca w
} 1xTTJyoq
} YIOR$
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//打印回应的头信息 J}@GKNm
public void logResponseHead(HttpURLConnection con) %h+uD^^$
{ +X^4;
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for(int i=1;;i++) Efr&12YSS
{ >L[lV_M_>
String header=con.getHeaderFieldKey(i); C1QWU5c v
if(header!=null) ZvH{wt
//responseHeaders.put(header,httpConnection.getHeaderField(header)); OoaY
Utility.log(header+" : "+con.getHeaderField(header)); v~5<:0dL
else =Ahw%`/&}]
break; v*r9j8
} grbTcLSF
} "$8w.C
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public void splitterStop() 3qo e^e
{ o}~3JBnT
bStop = true; yWHne~!
} X47O l
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} ;0j*>fb\q7
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/* K-4tdC3
**FileAccess.java 0QoLS|voA/
*//文件访问(定位,写) d@>\E/zA
package NetFox; }ywi"k4>
import java.io.*; ./.=Rw
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public class FileAccessI implements Serializable{ sqG`"O4W
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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 DHzkRCM
RandomAccessFile oSavedFile; 7;xKy'B\
long nPos; bi,mM,N/
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public FileAccessI() throws IOException 1Z:R,\+L
{ +/q0Y`v
this("",0); yW>R RE;
} J3&Sj{ o
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