/* G, }Yl
**SiteFileFetch.java 7Kr*P<-G
*/ {g'(~ qv
package NetFox; c?(4t67|
import java.io.*; vONasD9At
import java.net.*; p,EQ#Ik
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public class SiteFileFetch extends Thread { L4@K~8j7
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SiteInfoBean siteInfoBean = null; //文件信息Bean lZd(emH@
long[] nStartPos; //开始位置 !{+,B5 Hc
long[] nEndPos; //结束位置 t>L2
FileSplitterFetch[] fileSplitterFetch; //子线程对象 sNbxI|B
long nFileLength; //文件长度 JinUV6cr
boolean bFirst = true; //是否第一次取文件 \0^Kram>
boolean bStop = false; //停止标志 $P >
File tmpFile; //文件下载的临时信息 fF!Yp iI"
DataOutputStream output; //输出到文件的输出流 h/QXPdV
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//负责整个文件的抓取,控制内部线程(FileSplitterFetch类) poc`q5i+
public SiteFileFetch(SiteInfoBean bean) throws IOException -mbt4w
{ w1FcB$
siteInfoBean = bean; +r
//tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); u4*BX&
tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); U45e2~1!O
if(tmpFile.exists ()) Yj<a"
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{ k90YV(
bFirst = false; iOf<$f
read_nPos(); vOH4#
} XnH05LQ
else 3p$?,0ELH
{ i7CX65&b
nStartPos = new long[bean.getNSplitter()]; 0.Q
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nEndPos = new long[bean.getNSplitter()]; %HhBt5w
} pN,u`[
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} F0m-23[H
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public void run() .y'>[
{ 3xy<tqfr
//获得文件长度 V%t.l
//分割文件 DcS+_>a\{l
//实例FileSplitterFetch lwR<(u31e
//启动FileSplitterFetch线程 _f7 9wx\B
//等待子线程返回 ,=uD^n:
try{ mn'A9er
if(bFirst) c rQ8q;:
{ h!,v/7=
nFileLength = getFileSize(); 8:q1~`?5"b
if(nFileLength == -1) %6t:(z
{ OMky$d#
System.err.println("File Length is not known!"); Qry@
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} ;'gWu
else if(nFileLength == -2) xW+6qtG`
{ p0]=QH
System.err.println("File is not access!"); mwO6g~@`
} ^23~ZHu
else 1wii8B6
{ 3h]g}&k
for(int i=0;i<nStartPos.length;i++) mupT<_Y
{ ~EW(Gs!=C
nStartPos = (long)(i*(nFileLength/nStartPos.length)); t"sBPLU\
} a6ekG YW
for(int i=0;i<nEndPos.length-1;i++) PgAf\.48a
{ XjB W9a
nEndPos = nStartPos[i+1]; ,S\CC{!
} S0$8@"~=
nEndPos[nEndPos.length-1] = nFileLength; MnmVl"(/
} hy9\57_#
} 1l9G[o
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//启动子线程 _OYasJUMG
fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; l#&8x
for(int i=0;i<nStartPos.length;i++) j<u pRS,$
{ v6|RJt?
fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), g%o(+d
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), OUE(I3_
nStartPos,nEndPos,i); REQ\>UO_
Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); xexaQuK
fileSplitterFetch.start(); )',R[|<
} {.`vs;U
// fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), $Ph|e)p
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); 2'l'8
// Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", pR<`H'
nEndPos = " + nFileLength); SV4E0c>
// fileSplitterFetch[nPos.length-1].start(); $+Z[K.2J
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//等待子线程结束 7lTC{7C57
//int count = 0; gE-tjoJ
//是否结束while循环 eNh39er
boolean breakWhile = false; EZgwF=lO
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while(!bStop) _r#Z}HK
{ qyb?49I
write_nPos(); '(6z.
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Utility.sleep(500); I]|Pq
breakWhile = true; ;T\%|O=Ke
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for(int i=0;i<nStartPos.length;i++) _1X!EH"
{ BX/8O<s0
if(!fileSplitterFetch.bDownOver) ?JbilK}a
{ +D6YR$_<
breakWhile = false; P.se'z)E
break; W<{h,j8
} PxX4[ P
} LG0;#3YwH
if(breakWhile) h#I>M`|
break; $V;i
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//count++; Mc
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//if(count>4) W_293["lS
// siteStop(); R>|{N9
} Ng&%o
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System.err.println("文件下载结束!"); @)F )S7
} eSn+ B;
catch(Exception e){e.printStackTrace ();} Vsr.=Nd=
} 1NFsb-<u
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//获得文件长度 > tS'Q`R
public long getFileSize() =HK!(C
{ J`Q>3]wL
int nFileLength = -1; $GV7o{"&
try{ 3m[vXr?
URL url = new URL(siteInfoBean.getSSiteURL()); PN%zIkbo
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); ^S<Y>Nm]
httpConnection.setRequestProperty("User-Agent","NetFox"); ho{*Cjv
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int responseCode=httpConnection.getResponseCode(); D>r&}6<
if(responseCode>=400) &A/]pi-\
{ .Z`R^2MU
processErrorCode(responseCode); >~rTqtKd
return -2; //-2 represent access is error O^PKn_OJ
} ?5__oT
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String sHeader; _%Bi: HG0
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for(int i=1;;i++) cU (D{~
{ Y|m+dT6
//DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); ;LfXi 8)
//Utility.log(in.readLine()); %Qgw7p4
sHeader=httpConnection.getHeaderFieldKey(i); hW')Sp
if(sHeader!=null) P;y45b
{ RU{twL.B
if(sHeader.equals("Content-Length")) yF:1( 4
{ 0JS?; fk
nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); bRDYGuC
break; e
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} OKZV{Gja
} 234p9A@
else GMx&y2. Z
break; ;>hO+Wo
} `RT>}_j
} iXkF1r]i
catch(IOException e){e.printStackTrace ();} )* : gqN
catch(Exception e){e.printStackTrace ();} ]#<4vl\
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Utility.log(nFileLength); eIF5ZPSZi
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return nFileLength; y1 DL,%j
} tFn)aa~L
+ 480 l}
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//保存下载信息(文件指针位置) )m+W
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private void write_nPos() +^ac'Y)A
{ P:S .~Jq
try{ A 'be8
output = new DataOutputStream(new FileOutputStream(tmpFile)); @s&71a
output.writeInt(nStartPos.length); Q} JOU
for(int i=0;i<nStartPos.length;i++) BVQqY$>
{ |i*37r6]=
// output.writeLong(nPos); u#fM_>ML
output.writeLong(fileSplitterFetch.nStartPos); /62!cp/F/D
output.writeLong(fileSplitterFetch.nEndPos); ,KZ~?3$yj
} !n!*/[}X
output.close(); /HEw-M9z
} s[*rzoA
catch(IOException e){e.printStackTrace ();} 7WqH&vU|
catch(Exception e){e.printStackTrace ();} VCfl`Aq'l
} s)t@ol
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//读取保存的下载信息(文件指针位置) q q`4<0 I>
private void read_nPos() nPtuTySG
{ bs&43Ae
try{ }K>d+6qk5
DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); @{e}4s?7od
int nCount = input.readInt(); ]q[D>6_
nStartPos = new long[nCount]; l'1pw
nEndPos = new long[nCount]; ~/U1xk%
for(int i=0;i<nStartPos.length;i++) [aLI
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{ @bLy,Xr&
nStartPos = input.readLong(); B@))8.h]
nEndPos = input.readLong(); 2.y-48Nz
} dQX6(Jj
input.close(); :=V[7n])
} nF:4}qy\
catch(IOException e){e.printStackTrace ();} 4@gG<QJW
catch(Exception e){e.printStackTrace ();} U>SShpmZA
} }6~hEc*/"
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private void processErrorCode(int nErrorCode) Qljpx?E
{ V &T~zh1
System.err.println("Error Code : " + nErrorCode); MJ)RvNF
} D)P ._?
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//停止文件下载 >6-`}G+|
public void siteStop() hfB%`x#akQ
{ Uc>lGo1j
bStop = true; Z\rwO>3
for(int i=0;i<nStartPos.length;i++) 4"ZP 'I;
fileSplitterFetch.splitterStop(); LOYk9m
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} VQ@
} e%M;?0j
//负责部分文件的抓取 Y|qTyE%
**FileSplitterFetch.java wQf-sk#
*/ ?j.,Nw4FC
package NetFox; {YC@T(
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import java.io.*; 1GRCV8"Z^
import java.net.*; >R_&Ouh:
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public class FileSplitterFetch extends Thread { q
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String sURL; //File URL _f,C[C[e&
long nStartPos; //File Snippet Start Position djZqc5t
long nEndPos; //File Snippet End Position c6]U E@A
int nThreadID; //Thread's ID s8Q 5ui]
boolean bDownOver = false; //Downing is over 0mVNQxHI
boolean bStop = false; //Stop identical qR{=pR
FileAccessI fileAccessI = null; //File Access interface V0YZp
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public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException gQuw1
{ J;e2&gB
this.sURL = sURL; C )
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this.nStartPos = nStart; 0+ '&`Q!u
this.nEndPos = nEnd; 5tkAFb4P
nThreadID = id; =qIp2c}Rx
fileAccessI = new FileAccessI(sName,nStartPos);//定位 Zi
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} Q&;9x? e
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public void run() w9imKVry
{ *^4"5X@
while(nStartPos < nEndPos && !bStop) 33q}CzK
{ ^
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try{ J8(lIk:e
URL url = new URL(sURL); &z3o7rif$
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); 0d&6lqTo
httpConnection.setRequestProperty("User-Agent","NetFox"); NI]N4[8(
String sProperty = "bytes="+nStartPos+"-"; aXYY:;
httpConnection.setRequestProperty("RANGE",sProperty); Y.UFbrv
Utility.log(sProperty); Vb_4f"
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InputStream input = httpConnection.getInputStream(); x9g#<2w8
//logResponseHead(httpConnection); p6@)-2^
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byte[] b = new byte[1024]; xp{tw$
int nRead; q9_OGd|P
while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) "8MF_Gu):
{ 7$=InK
nStartPos += fileAccessI.write(b,0,nRead); 0S~rgq|O
//if(nThreadID == 1) 2ilQXy
// Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); vE?G7%,
} HV|,}Wks6s
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Utility.log("Thread " + nThreadID + " is over!"); n>YKa)|W`
bDownOver = true; NLqzi%s
//nPos = fileAccessI.write (b,0,nRead); da(<K}
} PZ9I`P!C
catch(Exception e){e.printStackTrace ();} R 9\*#c
} Yq
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} %u'ukcL7
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//打印回应的头信息 ZE}}W_
public void logResponseHead(HttpURLConnection con) :I#V.
{ &QgR*,5eo
for(int i=1;;i++) Rm( "=(
{ }7Q% 6&IR
String header=con.getHeaderFieldKey(i); 5b*C1HS@X
if(header!=null) T~e.PP
//responseHeaders.put(header,httpConnection.getHeaderField(header)); |{ip T SH
Utility.log(header+" : "+con.getHeaderField(header)); L8B!u9%
else 77Y/!~kd
break; w?[u pn:K
} 7.oM J
} fHFE){
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public void splitterStop() |L ev.,,Ph
{ %ET+iIhK
bStop = true; g7H(PF?
} 1qA;/-Zr<o
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} })%{AfDRF
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/* 5H^(2w
**FileAccess.java o]V^};B
*//文件访问(定位,写) F^:3?JA_
package NetFox; t6c4+D'{].
import java.io.*; l/5
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public class FileAccessI implements Serializable{
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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 9(Xn>G'iT
RandomAccessFile oSavedFile; Di{de`
long nPos; wCBplaojJ
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public FileAccessI() throws IOException }SZd
{ ~}
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this("",0); Vurqt_nb
} %cn<ych
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public FileAccessI(String sName,long nPos) throws IOException #'`{Qv0,
{ KI.hy2?e
oSavedFile = new RandomAccessFile(sName,"rw"); vY3h3o
this.nPos = nPos; n@3>6_^rwT
oSavedFile.seek(nPos); V7/Rby Q
} [}m[ )L\
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public synchronized int write(byte[] b,int nStart,int nLen) {!`6zBsP
{ #vlgwA
int n = -1; lOp`m8_=
try{ 8@R|Km5h
oSavedFile.write(b,nStart,nLen); Fr-SvsNFB
n = nLen; 7tp36 TE
} l[J8!u2Xp
catch(IOException e) P+}h$_x
{ j~MI<I+l[
e.printStackTrace (); WIGi51yC.x
} rJB}qYD
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return n; eMzk3eOJ
} ar,7S&s