/* x7\b-EC
**SiteFileFetch.java {\zTE1X9
*/ 3/_rbPr
package NetFox; 3-x ;_
import java.io.*; *\Z9=8yK
import java.net.*; s^f7w
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public class SiteFileFetch extends Thread { Buc{dcL/
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SiteInfoBean siteInfoBean = null; //文件信息Bean J5dwd,FQ
long[] nStartPos; //开始位置 NxY B)`~
long[] nEndPos; //结束位置 %8Eu{3
FileSplitterFetch[] fileSplitterFetch; //子线程对象 @^P<(%p
long nFileLength; //文件长度 S7pf
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boolean bFirst = true; //是否第一次取文件 8Of.n7{
boolean bStop = false; //停止标志 vH1IVF"DS
File tmpFile; //文件下载的临时信息 WH|TdU$V
DataOutputStream output; //输出到文件的输出流 %Q,6 sH#
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//负责整个文件的抓取,控制内部线程(FileSplitterFetch类) >b\{y}[
public SiteFileFetch(SiteInfoBean bean) throws IOException `Iwl\x[A
{ |5il5UP
siteInfoBean = bean; 7v'aw"~
//tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); Qa`+-Wu8
tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); 2{U5*\FhVX
if(tmpFile.exists ()) _[)f<`!g_V
{ HSwC4y}
bFirst = false; `JQw]\f4>
read_nPos(); 2P35#QI[)
} p1F{ v^
else 1S[4@rZ
{ u~rPqBT{d3
nStartPos = new long[bean.getNSplitter()]; C b4.N8
nEndPos = new long[bean.getNSplitter()]; '=AqC,\#
} ?)NgODU
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} ^%5;Sc1V
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public void run() Xsk/U++
{ CwjKz*'[g
//获得文件长度 inHlL
//分割文件 !LR9}Xon
//实例FileSplitterFetch >O]u4G!
//启动FileSplitterFetch线程 D :)HKD.
//等待子线程返回 ?_-5W9
try{ `y3*\l
if(bFirst) w`GjQIA
{ \B4f5L8k
nFileLength = getFileSize(); /9b+I/xY"
if(nFileLength == -1) KzZfpdI92
{ a#D \8;
System.err.println("File Length is not known!"); DX0#q #
} 'QSj-
else if(nFileLength == -2) &>n:7
{ ffW-R)U|3
System.err.println("File is not access!"); -!lSk?l
} Aflf]G1
else &t U&ZH
{ '2qbIYanh
for(int i=0;i<nStartPos.length;i++) [_`<<!u>-
{ AvVPPEryal
nStartPos = (long)(i*(nFileLength/nStartPos.length)); fBb:J +
} !k<k]^Z\
for(int i=0;i<nEndPos.length-1;i++) vYybQ&E/
{ FKtG
nEndPos = nStartPos[i+1]; a8YFH$Xh
} !a4`SjOgu
nEndPos[nEndPos.length-1] = nFileLength; .unlr_eA
} ~#jnkD
} T|&u?
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//启动子线程 _'|C-j`u$
fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; *V_b/Vt
for(int i=0;i<nStartPos.length;i++) z57q|
{ $a|>>?8
fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), 5g`J}@"k
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), vA{DF{S4
nStartPos,nEndPos,i); }tW1\@
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Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); wE-y4V e
fileSplitterFetch.start(); B qo#cnlG
} G%junS'zt
// fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), as73/J6
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); ujn7DBE"
// Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", 6P
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nEndPos = " + nFileLength); a$EudD#+
// fileSplitterFetch[nPos.length-1].start(); 4av
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//等待子线程结束 uF ;8B]"
//int count = 0; _}j6Pw'
//是否结束while循环 g*-}9~
boolean breakWhile = false; RT2&^9-
-
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while(!bStop) jgqeDl\=+
{ k~2FlRoC^
write_nPos(); tI
Utility.sleep(500); cpPS8V
breakWhile = true; m2l0`l~T8
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for(int i=0;i<nStartPos.length;i++) sHPlNwyy
{ +f}w+
if(!fileSplitterFetch.bDownOver) u`XZtF<vf
{ gk}.LE
breakWhile = false; LWxP}? =
break; [B^V{nUBc
} &Z}}9dd
} a
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if(breakWhile) @7t*X-P.;-
break; 4<- E0
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//count++; z<s~`
//if(count>4) 7H)tF&
// siteStop(); 1lsg|iVz
} x}f)P
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System.err.println("文件下载结束!"); >J,IxRGi
} &m`@6\N(
catch(Exception e){e.printStackTrace ();} fG<[zt\e
} #%]?e
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//获得文件长度
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public long getFileSize() BOl*. t
{ P#/s5D8
int nFileLength = -1; sDwE,f0h
try{ IFXn GDG$
URL url = new URL(siteInfoBean.getSSiteURL()); 'h>l_A
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); i7?OZh*f
httpConnection.setRequestProperty("User-Agent","NetFox"); 4)9Pgp:
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int responseCode=httpConnection.getResponseCode(); BO 3z$c1yU
if(responseCode>=400) ^C8f(
{ TrVQ]9;jWk
processErrorCode(responseCode); 6f
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return -2; //-2 represent access is error OSK:Cb.-?F
} i;J*9B_U
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String sHeader; bR=TGL&
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for(int i=1;;i++) .Pa6HA !
{ rjH W
//DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); Tt{ft?H71
//Utility.log(in.readLine()); +H_ /
sHeader=httpConnection.getHeaderFieldKey(i); 3H5<w4yk
if(sHeader!=null) 7':<I-Fm
{ <*opVy^
if(sHeader.equals("Content-Length")) %%Wn: c>
{ 1k)`C<l
nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); O.?q8T)n82
break; s3)T}52
} >kV=h?]Y
} H"rIOoxf
else Bs-MoT!
break; ^p~ 3H
} (!<G` ;}u
} =YR+`[bfI
catch(IOException e){e.printStackTrace ();} EkP(]F
catch(Exception e){e.printStackTrace ();} &^ =Y76
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Utility.log(nFileLength); %U$%x
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return nFileLength; 5{#ya2
} ~
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//保存下载信息(文件指针位置) g@S?5S.Av
private void write_nPos() Va\?"dH>M
{ LYS[qLpf
try{ Q#I?nBin
output = new DataOutputStream(new FileOutputStream(tmpFile)); O:X|/g0Y
output.writeInt(nStartPos.length); gd ; e-.
for(int i=0;i<nStartPos.length;i++) wk6tdY{&s
{ u=B,i#>s
// output.writeLong(nPos); _lG\_6oJ,
output.writeLong(fileSplitterFetch.nStartPos); .w~zW*M0
output.writeLong(fileSplitterFetch.nEndPos); ,:3Di (
} MtK5>mhZI`
output.close(); -MeO|HWm
} nB ,&m&
catch(IOException e){e.printStackTrace ();} JZ0u/x5
catch(Exception e){e.printStackTrace ();} 9/50+2F
} (2%z9W
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//读取保存的下载信息(文件指针位置) qgsKbsl
private void read_nPos() 4 Yl:1rz
{ AlT04H
try{ rxAb]~MMp
DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); 1)h+xY
int nCount = input.readInt(); p"/B3
nStartPos = new long[nCount]; sm @Ot~;
nEndPos = new long[nCount]; n&}ILLc
for(int i=0;i<nStartPos.length;i++) }5Pzen
{ qn@:A2ed
nStartPos = input.readLong(); 2;=xHt
nEndPos = input.readLong(); ,46k8%WW
} !4
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input.close(); nK|WzUtp
} ZIM 5$JdCv
catch(IOException e){e.printStackTrace ();} =ZN~*HLl}
catch(Exception e){e.printStackTrace ();} ]+i~Cbj
} fmq9u(!R
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private void processErrorCode(int nErrorCode) eI*o9k$Qs
{ : w 4Sba3
System.err.println("Error Code : " + nErrorCode); NX:i]t
} 2M+'9+k~
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//停止文件下载 Sj<WiQ%<
public void siteStop() gEU|Bx/!=
{ sYb( g'W*'
bStop = true; O9]+Jd4W
for(int i=0;i<nStartPos.length;i++) + %07J6
fileSplitterFetch.splitterStop(); ln6Hr^@5
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} P ||:?3IH
} K PSHBv-#
//负责部分文件的抓取 ];1Mg
**FileSplitterFetch.java pe$l'ur
*/ |\MgE.N
package NetFox; mVuZ}`
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import java.io.*; ?ydqmj2[F
import java.net.*; m|w-}s,
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public class FileSplitterFetch extends Thread { $.2#G"|
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String sURL; //File URL 5u-jjUO
long nStartPos; //File Snippet Start Position >FabmIcC
long nEndPos; //File Snippet End Position 89[5a
int nThreadID; //Thread's ID (}u2) 9
boolean bDownOver = false; //Downing is over C.[abpc
boolean bStop = false; //Stop identical @Js^=G2
FileAccessI fileAccessI = null; //File Access interface af<R.
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public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException r2]KP(T8|
{ Gd8FXk,.!
this.sURL = sURL; \' gb{JO
this.nStartPos = nStart; ~S, R`wo
this.nEndPos = nEnd; d/O~"d
nThreadID = id; |99/?T-QW
fileAccessI = new FileAccessI(sName,nStartPos);//定位 eZMDt B
} V6C*d:
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public void run() +I {ZW}rA
{ D 1Q@4
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while(nStartPos < nEndPos && !bStop) TUQ+?[
{ ,MxTT!9Su
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try{ 5QjM,"`mp
URL url = new URL(sURL); |ZAR!u&0
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); 5DEK`#*
httpConnection.setRequestProperty("User-Agent","NetFox"); 0 xUw}T6
String sProperty = "bytes="+nStartPos+"-"; VM1`:1Z:$
httpConnection.setRequestProperty("RANGE",sProperty); ebSG|F
Utility.log(sProperty); TM1isZ
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InputStream input = httpConnection.getInputStream(); ;p!|E3o.
//logResponseHead(httpConnection); 0'IV"eH2
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byte[] b = new byte[1024]; CHeU?NtFps
int nRead; 78}QaE
while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) pu:Ie#xTDf
{ jo8hVWJ7V*
nStartPos += fileAccessI.write(b,0,nRead); <,r|*pkhp~
//if(nThreadID == 1) %MQU&H9[
// Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); =r3 %jWH6
} O]\6Pv@N
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Utility.log("Thread " + nThreadID + " is over!"); QgZwU$`p0
bDownOver = true; o"te7nBI
//nPos = fileAccessI.write (b,0,nRead); "%o,P/<X
} :ub 4p4h*
catch(Exception e){e.printStackTrace ();} &Hb;; Ic(
} 7*9a`p3w
} eD4qh4|u.
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//打印回应的头信息 L9| 55z
public void logResponseHead(HttpURLConnection con) Ho}"8YEXNV
{ J4yL"iMt
for(int i=1;;i++) Ry@QJn I<
{ UE-<
String header=con.getHeaderFieldKey(i); kK27hfsw
if(header!=null) h%9>js^~
//responseHeaders.put(header,httpConnection.getHeaderField(header)); ;"}yVV/4
Utility.log(header+" : "+con.getHeaderField(header)); >tUi ;!cQ
else M.|cl#
break; ,f4VV\
} Q]9+-p(=
} U7)#9qS4
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public void splitterStop() [1-1^JY
{ -YXNB[C
bStop = true; }e7os0;s
} o$*aAgS+
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} 'pCZx9*c
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/* |[)k5nUQ|
**FileAccess.java
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*//文件访问(定位,写) V`/E$a1&
package NetFox; UlG8c~p
import java.io.*; =cwQG&as
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public class FileAccessI implements Serializable{ U9<AL.
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//RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 !cLdoX
RandomAccessFile oSavedFile; Vs[A
long nPos; ;Av=/hU
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public FileAccessI() throws IOException }ZQ)]Mr
{ Ic 5TtN~/>
this("",0); |fL|tkGEa
} mH1T|UI
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public FileAccessI(String sName,long nPos) throws IOException PykVXZ7j;
{ ;6 ?a8t@
oSavedFile = new RandomAccessFile(sName,"rw"); @q98ac*{
this.nPos = nPos; o1kTB&E4B
oSavedFile.seek(nPos); IhIz 7.|
} %DK0s(*w0
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public synchronized int write(byte[] b,int nStart,int nLen) q 9e(YX>
{ &d%\&fCm(
int n = -1; X#ZQpo'h
try{ *^ZJ&.
oSavedFile.write(b,nStart,nLen); J!{t/_aw
n = nLen; eD|p1+76
} f`$F^=
catch(IOException e) ,4Q1[K35B
{ 3WVH8S b
e.printStackTrace (); TpAE 9S
} fH@P&SX