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/* CB@7XUR **SiteFileFetch.java !(sn9z# */ Z%T Ajm package NetFox; 9hp&HL)BOa import java.io.*; qY_qS=H^ import java.net.*; =KRM`_QShg HDVimoOq )0{`}7X public class SiteFileFetch extends Thread { gesbt igO>)XbsM XN<SKW(H3 SiteInfoBean siteInfoBean = null; //文件信息Bean $:ush"=f8^ long[] nStartPos; //开始位置 A=|XlP$6 long[] nEndPos; //结束位置 j50vPV8m FileSplitterFetch[] fileSplitterFetch; //子线程对象 ,GbmL8P7Y long nFileLength; //文件长度 &|>@K#V8-; boolean bFirst = true; //是否第一次取文件
c{#2;k
Q, boolean bStop = false; //停止标志 \Lx=iKs< File tmpFile; //文件下载的临时信息 HB07 n4 | DataOutputStream output; //输出到文件的输出流 ^BsT>VSH6 <'y<8gpM //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) y]9R#\P/ public SiteFileFetch(SiteInfoBean bean) throws IOException 7vRtTP { ^W |YE72Y siteInfoBean = bean; }~FX!F#oU //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); yR[6s#F/h tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); 43=v2P0=Tj if(tmpFile.exists ()) k
%I83,+ { qpQ;,8X-" bFirst = false; TG2#$Bq1 read_nPos(); 2a d|v] } 0Tj,TF else /ViY:-8s { \S}/2]* 1 nStartPos = new long[bean.getNSplitter()]; D%SOX N nEndPos = new long[bean.getNSplitter()]; ;QI9 OcE@/ } m^X51,+< =NB[jQ :( .Rr^AGA4 @@d_F<Ym[ } {!,K[QwcI
a~}q]o?j U}92%W? public void run() osC?2. { F^,:p.ihm< //获得文件长度 \w9}O2lL //分割文件 CmEqo;Is //实例FileSplitterFetch |Xt G9A> //启动FileSplitterFetch线程 mhbczVw //等待子线程返回 YQ0#j'}/ try{ N8A)lYT]_u if(bFirst) Nt>^2Mv
{ Ni~IY#
' nFileLength = getFileSize(); dx%z9[8~{. if(nFileLength == -1) 9A|A@E# { :Cq73:1\B System.err.println("File Length is not known!"); jAJ='|[X\ } =VC18yA else if(nFileLength == -2) SYJO3cY { I0XJ&P% System.err.println("File is not access!"); p
fc6;K:d } '-wmY?ZFxy else H'AN osv { 91OxUVd for(int i=0;i<nStartPos.length;i++) @3`5(xwzm { b{0a/&&1O nStartPos = (long)(i*(nFileLength/nStartPos.length)); c4z&HQd } !73y(Y%TE for(int i=0;i<nEndPos.length-1;i++)
Pps$=` { N{J
1C6 nEndPos = nStartPos[i+1]; <rC%$tr } gt{kjrTv& nEndPos[nEndPos.length-1] = nFileLength; gL<n?FG4b } -K|1w'E } 9f~qD&~ T//xxH]w- ^h?fr` //启动子线程 <4rnOQ: fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; "FHJ_$! for(int i=0;i<nStartPos.length;i++) CR4O#f8\ { >n7h%c fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), M CC4' siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), [>ghs_?dZ nStartPos,nEndPos,i); 8}n<3_ Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); pRQ7rT',v fileSplitterFetch.start(); !*]i3 ,{7v } 7hJX // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), 7@@g|l] siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); ?%3dgQB' // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", n)yDep]$G nEndPos = " + nFileLength); UPtj@gtcY // fileSplitterFetch[nPos.length-1].start(); @a9.s 21TR_0g&< v_KO xV:<` //等待子线程结束 LR=Ji7 //int count = 0; f*%kHfaXgN //是否结束while循环 vyZ&%?{*R boolean breakWhile = false; WK|5:V8E ]SJ#:7 T)P)B6q while(!bStop) B*tYp { {aAd (~YZ write_nPos(); @}y. Utility.sleep(500); sVx}(J breakWhile = true; gnJ8tuS s{b\\$Rb *RkUF!)( for(int i=0;i<nStartPos.length;i++) ,HP }}K+S { .wNXvnWr if(!fileSplitterFetch.bDownOver) :M(uP e=D { NP;W=A F breakWhile = false; ?^VPO% break; t:2DB) } `D ;*.zrA } U:8[%a if(breakWhile) }Xj25` x break; mx^Ga=:
? PC9,;T&7_ {+9RJmZg //count++; I)mB]j //if(count>4) &nIu^,. // siteStop(); =}Tm8b0 } lpG%rN! 3(c-o0M k[@P526 System.err.println("文件下载结束!"); T-N>w;P } 7^><Vh"qV catch(Exception e){e.printStackTrace ();} 2 .3_FXSt } F*P0=DD f$dPDbZQ sZrVANyqb //获得文件长度 {KgA
V public long getFileSize() ^}+\ 52w { @` KYgjjH int nFileLength = -1; AJ7w_'u=@ try{ N,TV?Q5l7 URL url = new URL(siteInfoBean.getSSiteURL()); @jn&Wf? HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); C6)YZC httpConnection.setRequestProperty("User-Agent","NetFox"); M!,H0(@G `#$}P;W O|H: int responseCode=httpConnection.getResponseCode(); L('1NN2 if(responseCode>=400)
ZPZh6^cc { 0j@mzd2 processErrorCode(responseCode); E7$&:xqx return -2; //-2 represent access is error iTHwH{! } vK!`#W`X *?<N3Rr* rxyv+@~Nc String sHeader; {VAih-y *
BM|luYL !R8%C!=a for(int i=1;;i++) m[}P { :{a< ~n` //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); qA[lL( //Utility.log(in.readLine()); $0[T<]{/? sHeader=httpConnection.getHeaderFieldKey(i); .\caRb[ if(sHeader!=null) OD)X7PU { ox&5}&\ if(sHeader.equals("Content-Length")) W'4/cO { ]q"&V\b nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); &ZD@-"@ break; jC&fnt,O } !R@LC } *duG/?>P else +iC:/CJL break; b/_Zw^DPC } .,u>WIUxj } RQE]=N catch(IOException e){e.printStackTrace ();} Aits<0 catch(Exception e){e.printStackTrace ();} ^(JrOh' ^{"i eVn hwGK),?"+ Utility.log(nFileLength); Ovt]3`U9J EA~xxKq e_b,{l# return nFileLength; +Q+O$-a< } o(ow{S@=4 xVPSL#> 4$R!) //保存下载信息(文件指针位置) IRg2\Hq private void write_nPos() =G}a%)?As\ { 30HUY?'K try{ Z8=?Hu output = new DataOutputStream(new FileOutputStream(tmpFile)); M!6Fnj output.writeInt(nStartPos.length); TFkG"ev for(int i=0;i<nStartPos.length;i++) ^\v]Ltd { QD.5oS // output.writeLong(nPos); 0se%|Z|8 output.writeLong(fileSplitterFetch.nStartPos); -o+t&m output.writeLong(fileSplitterFetch.nEndPos); QjLU@?& } uL)MbM] output.close(); 3}}/,pGSc } "\*)KH`C catch(IOException e){e.printStackTrace ();} :Ak^M~6a5 catch(Exception e){e.printStackTrace ();} | +;ZC y } %ZoJu lH3.q4D
5 <l1/lm<# //读取保存的下载信息(文件指针位置) Mg\588cI private void read_nPos() k$v7@|Aw { c&T5C,] try{ *wJ$U DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); W^elzN(
int nCount = input.readInt(); W\[E nStartPos = new long[nCount]; '\{ OQH nEndPos = new long[nCount]; MLr L"I" for(int i=0;i<nStartPos.length;i++) ~"S5KroN { @Xoh@:j\ nStartPos = input.readLong(); AkW,Fp1e nEndPos = input.readLong(); 5V<6_o } ?4SYroXUX| input.close(); eQQVfEvS } 6No.2Oo catch(IOException e){e.printStackTrace ();} TJNE2 catch(Exception e){e.printStackTrace ();} I&|8
qx# } S*}GW-)oA CH+%q+I +]t9kr private void processErrorCode(int nErrorCode) 0(&uH0x { T\wOGaCW System.err.println("Error Code : " + nErrorCode); Z2{$FN } 3Dc^lfn *Iw19o-I toF6 Z //停止文件下载 % /zHL?RqJ public void siteStop() ?Zv5iI { fx 0 8>r
bStop = true; R GV{KL for(int i=0;i<nStartPos.length;i++) _BG`!3U+ fileSplitterFetch.splitterStop(); *QW.#y>"j 9^SrOW6~ w}}+8mk[ } j,,#B4b } q&ed4{H< //负责部分文件的抓取 RW>F %P **FileSplitterFetch.java dd=5`Bo9Yh */ qyyLU@hd package NetFox; s5 Fn("h]n \i~5H]?d IKp(KlA import java.io.*; 7({.kD6 import java.net.*; 'H1"z!] kH=~2rwm K6<1& public class FileSplitterFetch extends Thread { *|+ ~V/# GmGq69]J* I |D]NY^ String sURL; //File URL `).;W long nStartPos; //File Snippet Start Position $AFiPH9 long nEndPos; //File Snippet End Position Z?",+|4 int nThreadID; //Thread's ID nDC5/xB
boolean bDownOver = false; //Downing is over HSl$ U0 boolean bStop = false; //Stop identical 7f=9(Zj FileAccessI fileAccessI = null; //File Access interface .>zkS*oX4z of<>M4/g4y Dc>)j s|" public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException ;rta#pRn { cmh/a~vYaY this.sURL = sURL; Y@%6*uTLa this.nStartPos = nStart; ^_Z Qf this.nEndPos = nEnd; PzTTL=G + nThreadID = id; VA'< fileAccessI = new FileAccessI(sName,nStartPos);//定位 fs]Zw mA^ } ]O&A:Us =09j1:''<d s.dn~|a public void run()
?Ve5}N { !"J* while(nStartPos < nEndPos && !bStop) qXW2a'~ { TAJ 9Y< 4_I,wG@ -+I! (? try{ XWy
iS\ URL url = new URL(sURL); \ZDT=? HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); GrQAho httpConnection.setRequestProperty("User-Agent","NetFox"); A8eli=W String sProperty = "bytes="+nStartPos+"-"; |-aj$u%~ httpConnection.setRequestProperty("RANGE",sProperty); \&qVr1| Utility.log(sProperty); C X'E+ B
9Mwj:)} J2[QHr&tn InputStream input = httpConnection.getInputStream(); \T]"pE+8l //logResponseHead(httpConnection); !V-SV`+X R+JI?/H b~1p.J4 byte[] b = new byte[1024]; K;xW/7? int nRead; 'IW+"o while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) =L
wX+c { n0i&P9@B1 nStartPos += fileAccessI.write(b,0,nRead); o%9>elOju //if(nThreadID == 1) +@qk=]3a // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); EhUy7b,1_ } yaR; J+|ohA kL|Y-(FPo% Utility.log("Thread " + nThreadID + " is over!"); 835Upj> bDownOver = true; v_@_J!s //nPos = fileAccessI.write (b,0,nRead); R39R$\ } t(rU6miN catch(Exception e){e.printStackTrace ();} "=n8PNV/
c } _TXV{<E6 } _~(Xd@c(
Y)*lw l=]vC +mU //打印回应的头信息 O]g+z$2o public void logResponseHead(HttpURLConnection con)
E$>e<
T { zB$6e!fc for(int i=1;;i++) D5m\u$~V { kZ.3\ String header=con.getHeaderFieldKey(i); `k|nf9_ if(header!=null) )x7hhEk=^ //responseHeaders.put(header,httpConnection.getHeaderField(header)); uRy6~' Utility.log(header+" : "+con.getHeaderField(header)); 5#o,]tP else =|%T E break; RM+E } feW9>f; } PK4UdT *a%PA(%6 7:<Ed"rdE public void splitterStop() `x VA]GR4c { JrAc]= bStop = true; *]6dV' } {@$3bQ UVJ(iNK" 0cUt"(] } %p60pn[( pb
Ie)nK ix+x-G /* uP]o39b;V **FileAccess.java z0[ZO1Fo( *//文件访问(定位,写) |pR$' HO package NetFox; 8Q -F import java.io.*; l7!)#^`2_ )x &@j4, NF!1) public class FileAccessI implements Serializable{
]:fCyIE ,P@-DDJ //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 ?\M6P?tpo& RandomAccessFile oSavedFile; p'k+0= long nPos; j]"xck X2YOD2<v 3&fFIab9 public FileAccessI() throws IOException 9/(c cj { f {Z%:H this("",0); _ng= 5 } arKmc@"X O
f @#VZ p30&JJ!~" public FileAccessI(String sName,long nPos) throws IOException 8I0Tu { gCr|e}w- oSavedFile = new RandomAccessFile(sName,"rw"); cCGXB|9fYR this.nPos = nPos; f\U&M,L\' oSavedFile.seek(nPos); 8Vhck-wF } t`ceVS xcvr D _I-VWDCk public synchronized int write(byte[] b,int nStart,int nLen) $YY)g$ { _JTxm>
int n = -1; e)dWa'2< try{ yPh2P5}H> oSavedFile.write(b,nStart,nLen); vSC0D7BlG n = nLen; bH&)rn } 0/@ X!|X catch(IOException e) T)
tZU? { auTTvJ e.printStackTrace (); kefv=n*]l } !FO^:V<|5 qJXsf M6 N46$EsO!h return n; fCf#zV[ } @U3foL2\ W({TC A9l})_~i } WCmNibj B5,QJ W* \btR^;_\A /* Hn9F
gul& **SiteInfoBean.java Z\=04[ */ =PFR{=F package NetFox;
SU%rWH "4ozlWx k/_8!^:' public class SiteInfoBean { u2-@?yt leES YSY: CI!Eq&D, private String sSiteURL; //Site's URL 2@3.xG private String sFilePath; //Saved File's Path vf'cx:m private String sFileName; //Saved File's Name -<51CD w, private int nSplitter; //Count of Splited Downloading File )0U3w#,JQ w~$c= JO# Uc&6=5~Ys\ public SiteInfoBean() d]7|v
r] {//nSplitter的缺省值为5 Dpdn%8+Z //default value of nSplitter is 5 hk@`N;dn this("","","",5); LGo2^Xx } \U!@OX.R'M X$- boe? S?Bc~y public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) ?{"XrQw { P^8^1-b sSiteURL= sURL; &gA6+b' sFilePath = sPath; WjY{rM,K sFileName = sName; rmPne8D=c( this.nSplitter = nSpiltter; A-a17}fta [arTx^ -v;n"Zy1 } , G[r+4|h vXyuEEe C{UF~ public String getSSiteURL() ~JwpNJs { /`+Hwdk return sSiteURL; W&+y(Z-t } TsaW5ho<p 9Qzjqq:"Li U#;51_ public void setSSiteURL(String value) NqJ<!q)
{ w0 Fwd sSiteURL = value; 01LZE,. } r]k*7PK ~~C6)N~1 2Vp>" public String getSFilePath() /[a|DUoHO { E tJ~dL) return sFilePath; 45x,|h[F{5 } @J-plJ4e 8yE!7$Mj 5%<TF.;-J public void setSFilePath(String value) >vlQ|/C { H<`^w)? sFilePath = value; ?^LG
hdR } {UB%(E[Mr ~TYbP ;#3ekl{-g public String getSFileName() .Qd}.EG { 89zuL18V return sFileName; )fNGB]% } ZV!R#Xv RK?jtb=&A / ^w"' ' public void setSFileName(String value) \).Nag + { XjX 2[*l sFileName = value; 5pO]vBT } o
g_Ri$x8 D899gGe ,#
]+HS^B public int getNSplitter() T3=(` { ytEQ` return nSplitter; MzcB3pi } V
{p*z neF8V"-u& aZ$/<|y~:_ public void setNSplitter(int nCount) >GgE,h { cI5N"U@yN nSplitter = nCount; {Jrf/p9w } 5`"iq
"5Cf } $Jc q7E~ @9aGz6k+ ?fV?|ZGZI /* +vf:z?I8 **Utility.java y>`5Kyj3-@ */ J<rlz5': package NetFox; yX`#s]M Hoj8okP 975
_d_U public class Utility { avg4K*v v )Bo]=ZTJ^ guU=NQZ public Utility() Yr=8!iR$ { rS4%$p" JRXRi*@ 7{4w2) } d.p'pGL ;`+`#h3-V //线程睡眠 uxb:^d?D! public static void sleep(int nSecond) >VP5vkv= { pl|h>4af try{ yplG18 Thread.sleep(nSecond); W2hA-1 } 6lsEGe catch(Exception e) afx' { z3W3=@ e.printStackTrace (); ?_%u)S*g } J1X~vQAe } NO2(vE TdFT];: //日志 pM9yOY public static void log(String sMsg) >g]ON9CGH { P#MK System.err.println(sMsg); O[FZq47 } i $C-)d] Rk A8 *C7F2o public static void log(int sMsg) at|
\FOKj { 1'Rmg\( System.err.println(sMsg); Zj!Abji=O } :^#vxdIC? } s6n`?,vw hF>u)%J/S UV@0gdy[ /* `eR 7H>I **TestMethod.java Gq1)1 */ "}zt`3 package NetFox; ^_W40/c3 to> VD[pZ2;4 public class TestMethod { )+EN$*H p0VUh! cU8x Upq public TestMethod() Ee)xnY%( { ///xx/weblogic60b2_win.exe +qy6d7^ try{ }`_(<H SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); RB$
z]/= //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); p$XKlg& SiteFileFetch fileFetch = new SiteFileFetch(bean); ?JXa~.dA fileFetch.start(); wxdyF&U
n } B(,:h aAr catch(Exception e){e.printStackTrace ();} !MV@)
(. !Z|($21W i=rH7k } H
M:r0_ L'E^c,-x~ }r3~rG<D71 public static void main(String[] args) ,H[SI0]; { q-_' W, new TestMethod(); G5Yk bw# } /XbW<dfl } {/ 2E*|W~I 点击下载更多相关资料
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