/* 2`>/y
**SiteFileFetch.java vw=OGjT_>m
*/ {wMw$Fvf
package NetFox; y;A<R[|Ve
import java.io.*; WmU4~.
import java.net.*; pFi.?|6"
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public class SiteFileFetch extends Thread { w"d~R
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SiteInfoBean siteInfoBean = null; //文件信息Bean , f9V`Pz)
long[] nStartPos; //开始位置 *O-1zIlp
long[] nEndPos; //结束位置 2%4dA$H#4w
FileSplitterFetch[] fileSplitterFetch; //子线程对象 _[;>V*?zp5
long nFileLength; //文件长度 <>$`vuU
boolean bFirst = true; //是否第一次取文件 ^2E\{$J
boolean bStop = false; //停止标志 fkE4[X7f
File tmpFile; //文件下载的临时信息 p\I,P2on
DataOutputStream output; //输出到文件的输出流 %7=B?c|
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//负责整个文件的抓取,控制内部线程(FileSplitterFetch类) *(6vO{
public SiteFileFetch(SiteInfoBean bean) throws IOException dr0<K[S_
{ -=BQVJ_dK{
siteInfoBean = bean; K +n
//tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); i? 5jl&30
tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); @igGfYy
if(tmpFile.exists ()) *y[i~{7:
{ q[p+OpA
bFirst = false; *izPLM}+
read_nPos(); ({ 'I;]AQ
} j`jF{k b
else 1}+lL)-!
{ HqNM3 1)
nStartPos = new long[bean.getNSplitter()]; g a|RW0
nEndPos = new long[bean.getNSplitter()]; 3YT>3f!\
}
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} gwE#,OY*
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public void run() r0kJx$f
{ :*|%g
//获得文件长度 2u 8z>/G
//分割文件 iu!j#VO
//实例FileSplitterFetch x+Vp&
//启动FileSplitterFetch线程 @IL_
//等待子线程返回 <)n8lIK
try{ #\9sCnb
if(bFirst) #T<<{ RA
{ EIZSV>
nFileLength = getFileSize(); sLiKcR8^
if(nFileLength == -1) ',GWH:B
{ :SFcnYv0
System.err.println("File Length is not known!"); UjLZ!-}
} uk%C:4T
else if(nFileLength == -2) *Y!'3|T
{ ;M{@|z[Nv
System.err.println("File is not access!"); oc.H}Eb%Z
}
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else ! Ra.DSL
{ BR\3ij
for(int i=0;i<nStartPos.length;i++) qr>:meJy4
{ A0{ !m
nStartPos = (long)(i*(nFileLength/nStartPos.length)); Cv7FVl-I
} 3LXS}~&
for(int i=0;i<nEndPos.length-1;i++) *s4h tt
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nEndPos = nStartPos[i+1]; R
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} H^y%Bi&^
nEndPos[nEndPos.length-1] = nFileLength; ;/gH6Z?
} FPj j1U`C
} r [; .1,(
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//启动子线程 9_yO6)`
fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; pw;
for(int i=0;i<nStartPos.length;i++) -={Z::}S"
{ tMM*m
fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), L"|4
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siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), xEv]VL:
nStartPos,nEndPos,i); ?kBi9^)N4
Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); U$CAA5HV]
fileSplitterFetch.start(); 7/*Q?ic
} v:otR%yt
// fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), 72rnMHq
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); xj6ht/qq
// Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", 'iy &%?
nEndPos = " + nFileLength); c_$9z>$
// fileSplitterFetch[nPos.length-1].start(); gG"W~O)yv
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//等待子线程结束 &8VB{S>r
//int count = 0; b[+G+V
//是否结束while循环 Z"spua5
boolean breakWhile = false; +#qW 0g
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while(!bStop) sg@)IEg</v
{ bb<qnB
write_nPos(); _86pbr9
Utility.sleep(500); ,S"a ,}8
breakWhile = true; 5Fh?YS =
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for(int i=0;i<nStartPos.length;i++) Nb.AsIR^
{ 5?-cP?|.9
if(!fileSplitterFetch.bDownOver) }bj
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{ W)WL1@!Z
breakWhile = false; 6=ukR=]v
break; qs\O(K8
} A2Je*Gz
} 29:1crzx~
if(breakWhile) _`6fGu& W
break; [S{KGe:g
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//count++; Fa
//if(count>4) $nR1AOm}.B
// siteStop(); c\2+f7o@
} jKFypIZ4
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System.err.println("文件下载结束!"); k-;%/:Om
} qJq49}2
catch(Exception e){e.printStackTrace ();} 63hOK
} 5nq0#0Oc
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//获得文件长度
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public long getFileSize() oU }eAZj{
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int nFileLength = -1; 4F_*,_Y
try{ CiE
URL url = new URL(siteInfoBean.getSSiteURL()); g\sW2qXEw
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); |&JCf=
httpConnection.setRequestProperty("User-Agent","NetFox"); 6=V&3|"
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int responseCode=httpConnection.getResponseCode(); VCOz?Y*
if(responseCode>=400) y*ae 5=6(
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processErrorCode(responseCode); ~udi=J|
return -2; //-2 represent access is error b"U{@
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String sHeader; r>fx55dw
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for(int i=1;;i++) bZ!*s
{ :f^=~#!
//DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); 9f
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//Utility.log(in.readLine()); ;XFo:?
sHeader=httpConnection.getHeaderFieldKey(i); 4k9O6
if(sHeader!=null) f.?p"~!
{ o(~QuHOp8>
if(sHeader.equals("Content-Length")) wwnl_9a
{ *ea%KE":
nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); I@dS/
break; I!IWmU6FN
} 3QL I|VpO
} gXtyl]K:
else Q+e|;Mj
break; fIOI
} -phwzR\(t
} J!?hajw7N
catch(IOException e){e.printStackTrace ();} =rBNEd
catch(Exception e){e.printStackTrace ();} ByR%2_6&
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Utility.log(nFileLength); 8v&4eU'S
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return nFileLength; _c*0Rr
} r)$(>/[$
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//保存下载信息(文件指针位置) ^l\U6$3
private void write_nPos() &WW|! 6
{ I;dc[m
try{ cx?XJ)
output = new DataOutputStream(new FileOutputStream(tmpFile)); /A3tY"Vn
output.writeInt(nStartPos.length);
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for(int i=0;i<nStartPos.length;i++) v=4,kG
{ aa!o::;
// output.writeLong(nPos); 0pP;[7k\
output.writeLong(fileSplitterFetch.nStartPos); _8$arjx=
output.writeLong(fileSplitterFetch.nEndPos); }eA2y($N
} ~9.0:Fm<
output.close(); 2BA'Zu`
} 9F8"(
catch(IOException e){e.printStackTrace ();} f?O?2g
catch(Exception e){e.printStackTrace ();} NFT&\6!o
}
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//读取保存的下载信息(文件指针位置) #K1VPezN
private void read_nPos() Obd@#uab
{ s{v!jZ
try{ <ptZY.8N
DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); 7TCY$RcF,I
int nCount = input.readInt(); T_}9b
nStartPos = new long[nCount]; >5Vv6_CI0?
nEndPos = new long[nCount]; H+&c=~D\_
for(int i=0;i<nStartPos.length;i++) 7hPiPv
{ > %5<fK2
nStartPos = input.readLong(); +o]DT7W
nEndPos = input.readLong(); -3
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} b(8#*S!U
input.close(); Yj+p^@{S2P
} eR,ePyA;
catch(IOException e){e.printStackTrace ();} 5[Sa7Mk
catch(Exception e){e.printStackTrace ();} }?zy*yL
} Ba$&4?8
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private void processErrorCode(int nErrorCode) *n$=2v^A
{ 2"`R_q
System.err.println("Error Code : " + nErrorCode); \XaKq8uE
} qKX3Npw
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//停止文件下载 EHByo[
public void siteStop() (=n {LMa
{ 2l5>>yY
bStop = true; 0fhz7\a^_<
for(int i=0;i<nStartPos.length;i++) x9UF
fileSplitterFetch.splitterStop(); +Tnn'^4
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} s+{)K
} APydZ
//负责部分文件的抓取 +C4UM9
**FileSplitterFetch.java 2H7b2%
*/ #l kv&.)x
package NetFox; IbFS8 *a\
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import java.io.*; -%8*>%
import java.net.*; L4bx [
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public class FileSplitterFetch extends Thread { +AGI)uQQ
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String sURL; //File URL |KF_h^
long nStartPos; //File Snippet Start Position )erI3?k
long nEndPos; //File Snippet End Position QMUmPx&
int nThreadID; //Thread's ID (* WO<V
boolean bDownOver = false; //Downing is over ~ ;CnwG
boolean bStop = false; //Stop identical B(+J?0Dj
FileAccessI fileAccessI = null; //File Access interface N"A863>
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public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException 6M({T2e
{ zo!e<>o
this.sURL = sURL; A.0eeX{
this.nStartPos = nStart; |Tn+Aq7
this.nEndPos = nEnd; VKI`@rY4
nThreadID = id; {G _ :#cep
fileAccessI = new FileAccessI(sName,nStartPos);//定位 m0*bz5
} XxXMtiZ6
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public void run() (^x ,
{ /l o;:)AiP
while(nStartPos < nEndPos && !bStop) KxZup\\:v
{ hzG+s#
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try{ $\:;N]Cs~0
URL url = new URL(sURL); BhJag L ^o
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); tWD5Yh>.?$
httpConnection.setRequestProperty("User-Agent","NetFox"); 6|h~pH
String sProperty = "bytes="+nStartPos+"-"; 46p%y
httpConnection.setRequestProperty("RANGE",sProperty); 2`2S94'
Utility.log(sProperty); ;3~+M:{2
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InputStream input = httpConnection.getInputStream(); ,OGXH2!h
//logResponseHead(httpConnection); uvbXsO"z]]
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byte[] b = new byte[1024]; puE!7:X7
int nRead; {,kA'Px)
while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) ZboY]1L[j
{ VZ69s{/.B
nStartPos += fileAccessI.write(b,0,nRead);
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//if(nThreadID == 1) ~yrEB:w`_
// Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); yL ?dC"c
} xA?(n!{P
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Utility.log("Thread " + nThreadID + " is over!"); _ML`Vh]
bDownOver = true; @Kl'0>U
//nPos = fileAccessI.write (b,0,nRead); jv<C#0E^
} "9>.,nzt
catch(Exception e){e.printStackTrace ();} )21yD1"6
} m]XG7:}V0
} 5
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//打印回应的头信息 -OvzEmI"
public void logResponseHead(HttpURLConnection con) w-2?|XvDmf
{ .(2Zoa
for(int i=1;;i++) VMa\?`fT
{ iLvzoQ
String header=con.getHeaderFieldKey(i); (fSpY\JPI
if(header!=null) -UTTJnu^
//responseHeaders.put(header,httpConnection.getHeaderField(header)); 86_`Z$ s
Utility.log(header+" : "+con.getHeaderField(header)); C71\9K*X
else yu^n;gWH
break; "2J$~2{N
} Hi V7
} qj$6/V|D
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*=b#>//
public void splitterStop() Py}] {?
{ f`^\v
bStop = true; e\ Igc.
} .|Ee,Un
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} vv 7T/C
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/* OVy ZyZ#
**FileAccess.java {y>o6OTITR
*//文件访问(定位,写) E:!qncL:
package NetFox; [*{G,=tF`Y
import java.io.*; dc]D 8KX
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public class FileAccessI implements Serializable{ R=/^5DZ}
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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 !%8|R]d
RandomAccessFile oSavedFile; =~|:93]k
long nPos; 8M5a&