/* $'L(}gNv5
**SiteFileFetch.java lk6mu
*/ }`5%2iG
package NetFox; *N\U{)b\
import java.io.*; [NeOd77y
import java.net.*; ~;UK/OZ
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public class SiteFileFetch extends Thread { */nb%QV
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SiteInfoBean siteInfoBean = null; //文件信息Bean d";+8S
long[] nStartPos; //开始位置 ghbxRnU}
long[] nEndPos; //结束位置 #OJ^[Zi<
FileSplitterFetch[] fileSplitterFetch; //子线程对象 vq( @B
long nFileLength; //文件长度 0RtqqNFD
boolean bFirst = true; //是否第一次取文件 )P:TVe9`
boolean bStop = false; //停止标志 egx(N
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File tmpFile; //文件下载的临时信息 J%j#gyTU
DataOutputStream output; //输出到文件的输出流 Z7k {7
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//负责整个文件的抓取,控制内部线程(FileSplitterFetch类) 7k+UCiu>
public SiteFileFetch(SiteInfoBean bean) throws IOException U>:CX
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{ qZKU=HM
siteInfoBean = bean; uO,90g[C/R
//tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); cQ*:U@
tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); L)8;96
if(tmpFile.exists ()) Wf0ui1@
{ `o/tpuI
bFirst = false; [ {lF1+];@
read_nPos(); 9p2"5x
} {r[*}Bv
else mOGcv_L
{ JY9Hqf
nStartPos = new long[bean.getNSplitter()]; sw{EV0&>m
nEndPos = new long[bean.getNSplitter()]; c!{.BgGN
} FT `y3~
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} y'2K7\>E
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public void run() .LnXKRd{
{ qZ`@Ro
//获得文件长度 6M+~{9(S
//分割文件 lG fO
//实例FileSplitterFetch qi7dcn@d
//启动FileSplitterFetch线程 isWB)$q
//等待子线程返回 gOgG23 x
try{ 1MfRFv
if(bFirst) s8@f Z4
{ 47`{ e_YP0
nFileLength = getFileSize(); akJ{-
if(nFileLength == -1) pOIFO=k
{
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System.err.println("File Length is not known!"); GdL\
} *=^_K`y
else if(nFileLength == -2) .?!{. D
{ ik7#Og~3
System.err.println("File is not access!"); MI',E?#yB
} yq6!8OkF
else ,dZ
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{ [OH>NpL
for(int i=0;i<nStartPos.length;i++) \
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{ 7D9R^\K
nStartPos = (long)(i*(nFileLength/nStartPos.length)); GlQ=M )E
} ]y.,J
for(int i=0;i<nEndPos.length-1;i++) 2=F_<Jh|+
{ ;PG'em
nEndPos = nStartPos[i+1]; f=}u;^
} rAP+nh ans
nEndPos[nEndPos.length-1] = nFileLength; mUcHsCszH
} Dih~5
} `1M_rG1/+
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//启动子线程 *DDfdn
fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; D!qtb6<.
for(int i=0;i<nStartPos.length;i++) WYEvW<Hv
{ <XCH{Te1
fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), MW'z*r|,
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), O!Mm~@MoA
nStartPos,nEndPos,i); #z~D1Zl
Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); YwB5Zqr
fileSplitterFetch.start(); .}Bb
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} K8284A8v
// fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), g.F{yX]
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); (z^2LaM `8
// Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", b$rBxe\
nEndPos = " + nFileLength); t M A
// fileSplitterFetch[nPos.length-1].start(); #'$CC<*vy
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//等待子线程结束 EMJio\
//int count = 0; @Q TG
//是否结束while循环 QWfwoe&;R:
boolean breakWhile = false; &Sc0l/
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while(!bStop) Fda<cS]
{ Q7`zrCh
write_nPos(); 2t#9ih"9
Utility.sleep(500); scN}eg:5
breakWhile = true; &X +@,!
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for(int i=0;i<nStartPos.length;i++) {s_0[>
{ X9zTz2 Fy
if(!fileSplitterFetch.bDownOver) 'p Z~3q
{ m,]Tl;f
breakWhile = false; $c f?`k
break; dI'C[.zp[
} )M^;6S
} #`}g?6VHo
if(breakWhile) 0D0 #*J
break; ;?%2dv2d
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//count++; bNIT 1'v
//if(count>4) H+_oK
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// siteStop(); %3"3OOT7
} 9.PY49|
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System.err.println("文件下载结束!"); nef-xxXC^I
} 28Q`O$=v
catch(Exception e){e.printStackTrace ();} 5F&i/8Ib
} JEFW}M)UGv
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//获得文件长度 _VR4|)1g
public long getFileSize() x7{,4js
{ } vcr71u
int nFileLength = -1; 0Wv9K~F
try{ hFQC%N.'
URL url = new URL(siteInfoBean.getSSiteURL()); KGK8;Q,O
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); +$8hTi,
httpConnection.setRequestProperty("User-Agent","NetFox"); "B)DX*-\?
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int responseCode=httpConnection.getResponseCode(); @RT yCr
if(responseCode>=400) Fd|:7NRA<
{ "fz-h
processErrorCode(responseCode); c WK@O>
return -2; //-2 represent access is error 4+l7v?:Pr
} 9H P)@66
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String sHeader; .%~
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for(int i=1;;i++) ;zz"95X7
{ `Gsh<.w!7
//DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); x2|DI)J1'
//Utility.log(in.readLine()); Mzxz- cE
sHeader=httpConnection.getHeaderFieldKey(i); /R@(yT=t
if(sHeader!=null) x1A^QIuxO
{ ,{zvGZ|
if(sHeader.equals("Content-Length")) Z AZQFr'*
{ Nnv&~D>
nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); rKi)VVkx_
break; j-yD;N
} a$9UUH-|
} ,9W 0fm\t
else j:{<
break; wiwJD}3h'
} ocL
} 5O)Z}
catch(IOException e){e.printStackTrace ();} G-,PsXSwe
catch(Exception e){e.printStackTrace ();} TD\QX2m
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Utility.log(nFileLength); _);1dcnR
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return nFileLength; n7{1m$/
} QKHm OVh]
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//保存下载信息(文件指针位置) (S9"(\A
private void write_nPos() ts9N$?0:V
{ i<%(Z[9Lk
try{ /vU9eh"%
output = new DataOutputStream(new FileOutputStream(tmpFile)); Do2y7,jv
output.writeInt(nStartPos.length); bM;tQ38*
for(int i=0;i<nStartPos.length;i++) ZO0_:T#Z
{ rEddX
// output.writeLong(nPos); mP:mzmUw
output.writeLong(fileSplitterFetch.nStartPos); 94K;=5h
output.writeLong(fileSplitterFetch.nEndPos); dcXtT3,kpX
} guFR5>-L
output.close(); C'zMOR6c
} p8F|]6Z
catch(IOException e){e.printStackTrace ();} H<1C5-
catch(Exception e){e.printStackTrace ();} tK8\Ib J
} +Pa!pj/< z
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//读取保存的下载信息(文件指针位置) ^!kvgm<{$
private void read_nPos() b[BSUdCB
{ drb_GT
try{ q:?g?v
DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); %iJ6;V4
int nCount = input.readInt(); h ]MSjC.X
nStartPos = new long[nCount]; ?$r+#'asd(
nEndPos = new long[nCount]; ! '2'db
for(int i=0;i<nStartPos.length;i++) ]~a!O
{ ;>Z#1~8
nStartPos = input.readLong(); hXMC!~Th
nEndPos = input.readLong(); SkPv.H0Id
} ?(g kkYI
input.close(); av`b8cGg
} qTffh{q V
catch(IOException e){e.printStackTrace ();} %*jpQOw
catch(Exception e){e.printStackTrace ();} EH,uX{`e
} I
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private void processErrorCode(int nErrorCode) QjQJ "
{ B]]M?pS
System.err.println("Error Code : " + nErrorCode); ?*4]LuK6
} zIdQ^vm8Q
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//停止文件下载 ~zRW*pd
public void siteStop() qqkZbsN
{ V8,$<1Fi;-
bStop = true; "KFCA9u-
for(int i=0;i<nStartPos.length;i++) 7:1Hgj(
fileSplitterFetch.splitterStop(); z<AQ;b
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} .Hgiru&
} OSSMIPr
//负责部分文件的抓取 5[Q44$a{
**FileSplitterFetch.java 8PQ$X2)
*/ PE4{;|a }
package NetFox; e?f[t*td
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import java.io.*; j" YJ1R-5
import java.net.*; >,~JQ%1
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public class FileSplitterFetch extends Thread { Ebq5P$
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String sURL; //File URL (:hPT-1
long nStartPos; //File Snippet Start Position q.g!WLiI
long nEndPos; //File Snippet End Position 9Y/c<gbY
int nThreadID; //Thread's ID *,
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boolean bDownOver = false; //Downing is over 0~FX!1;
boolean bStop = false; //Stop identical ?rv+ydR/q
FileAccessI fileAccessI = null; //File Access interface G=b`w;oL:
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public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException [IHT)%>E8&
{ J 0s8vAs
this.sURL = sURL; 8, WQ}cC
this.nStartPos = nStart; F<^,j7@
this.nEndPos = nEnd; 8`^I.tD
nThreadID = id; ,q:6[~n
fileAccessI = new FileAccessI(sName,nStartPos);//定位 31bKgU{
} 1x\%VtO>\b
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public void run() <89js87
{ R)<>} y
while(nStartPos < nEndPos && !bStop) ;Y)?6^"
{ zlXkD~GV
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try{ YjsaTdZ!&
URL url = new URL(sURL); 9|OQHy
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); qkR.{?x
httpConnection.setRequestProperty("User-Agent","NetFox"); Tl25t^Y
String sProperty = "bytes="+nStartPos+"-"; 5g/WQo\
httpConnection.setRequestProperty("RANGE",sProperty); y`\/eX
Utility.log(sProperty); O'!k$iJNb
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InputStream input = httpConnection.getInputStream(); ,a?em'=
//logResponseHead(httpConnection); %VwB
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byte[] b = new byte[1024]; ;GvyL>|-~
int nRead; hz )L+
while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) (6.0gB$aTu
{ 6o{anHBB
nStartPos += fileAccessI.write(b,0,nRead); ,@ [Q:fY
//if(nThreadID == 1) gp$+Qd
// Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); )6!SFj>.O
} N;ssO,
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Utility.log("Thread " + nThreadID + " is over!"); ch< zpo:
bDownOver = true; C\}m_`MR
//nPos = fileAccessI.write (b,0,nRead); Ebp8})P/~
} 3xj<ATSe
catch(Exception e){e.printStackTrace ();} gA.G:1v
} +z9;BPw%
} g fO.Ky6
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//打印回应的头信息 g]d@X_ &D
public void logResponseHead(HttpURLConnection con) 6,oi(RAf
{ kQ4%J,7e4
for(int i=1;;i++) 5oORwOP
{ .8wR;^
String header=con.getHeaderFieldKey(i); }*?e w
if(header!=null) N%>/
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//responseHeaders.put(header,httpConnection.getHeaderField(header)); (o e;pa
Utility.log(header+" : "+con.getHeaderField(header)); Iy e
else ?(ks=rRK
break; 5"@<7/2qI
} g#Yqw
} `uGX/yQ#=
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public void splitterStop() qjTz]'^BpM
{ '+-R 7#
bStop = true; dJCu`34Y'|
} t}TtWI
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} t6js@Ih
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/* S
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**FileAccess.java ;'cv?3Y
*//文件访问(定位,写) ^\_`0%`>
package NetFox; 1!=$3]l0Lj
import java.io.*;
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public class FileAccessI implements Serializable{ r+
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in B}ydk
//RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 5t0i/&zX
RandomAccessFile oSavedFile; <2,@rYe/
long nPos; ]4hXK!^Uu
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public FileAccessI() throws IOException )Cx8?\/c=x
{ kqHh@]Z0'
this("",0); RV&2y=eb
} m<OxO\ Mpf
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public FileAccessI(String sName,long nPos) throws IOException :G}tvFcOAF
{ t,MK#Ko
oSavedFile = new RandomAccessFile(sName,"rw"); a>s v
this.nPos = nPos; }rGDM
oSavedFile.seek(nPos); u1nv'\*
} b6NttY!3
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public synchronized int write(byte[] b,int nStart,int nLen) 6"%[s@C
{ '^P
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int n = -1; R]ppA=1*_l
try{ RRq*CLj
oSavedFile.write(b,nStart,nLen); E$Ge#
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n = nLen; /=Xen
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} iUl{_vb
catch(IOException e)
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{ Jl5<9x
e.printStackTrace (); rJNf&x%6
} hefV0)4K
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return n; q
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} _&B