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/* YuuG:Kk **SiteFileFetch.java $CV'p/^En */ \r&@3a.> package NetFox; \?IwR]@y import java.io.*; uw&,pq import java.net.*; 0X6o _\6(4a`, @_Oe`j^ public class SiteFileFetch extends Thread { \d`Sz
* fXQRsL8
] $+N^ s^ SiteInfoBean siteInfoBean = null; //文件信息Bean )x s, long[] nStartPos; //开始位置 NGzqiu"J long[] nEndPos; //结束位置 1Ac1CsK* FileSplitterFetch[] fileSplitterFetch; //子线程对象 x/^zNO\1 long nFileLength; //文件长度 ${2fr&Tp boolean bFirst = true; //是否第一次取文件 u{d` boolean bStop = false; //停止标志 (pg9cM]NA File tmpFile; //文件下载的临时信息 =l9#/G#R DataOutputStream output; //输出到文件的输出流 CT`X~y10 32/P(- //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) cW%O- public SiteFileFetch(SiteInfoBean bean) throws IOException jg/<"/E { .k(_j.v siteInfoBean = bean; i)DXb //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); 9D21e(7X tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); AXI:h"so if(tmpFile.exists ()) <us{4% { ' 1nU[,Wj bFirst = false; I-hhHm<@ read_nPos(); a^,RbV/ } m$g^On else 8B9zo& { A4x3TW? nStartPos = new long[bean.getNSplitter()]; n-Y'LK40Os nEndPos = new long[bean.getNSplitter()]; 0&~u0B{ } >c eU!=> 3!W&J RkM! BcB b>WT-.b0 } ) P])0Y- I-"{m/PEdg n5/Q)*e0'# public void run() (v}: { z`SkKn0f
Y //获得文件长度 b<7f:drVC //分割文件 _Ohq'ZgXm //实例FileSplitterFetch h='=uj8o5 //启动FileSplitterFetch线程 !HYqM(|{. //等待子线程返回 ;;5i'h~?]J try{ UJ:B:hh'' if(bFirst) m6D4J=59 { H2vEFn V nFileLength = getFileSize(); kF .b) if(nFileLength == -1) dPId=
w) { 7(Kc9sJC%% System.err.println("File Length is not known!"); %|>i2 } `314.a6S else if(nFileLength == -2) ,~#hHhR_ { J)o%83// System.err.println("File is not access!"); ,?+yu6eLb } `R RORzXoS else P9vROzXK { [G*mQ@G9 for(int i=0;i<nStartPos.length;i++) ;U&VPIX$ { Z)%p,DiNM nStartPos = (long)(i*(nFileLength/nStartPos.length)); $)!Z"2T } (n\
cs$ for(int i=0;i<nEndPos.length-1;i++) ix;8S=eP~{ { QR4o j nEndPos = nStartPos[i+1]; ;nE}%lT } 9 pn1d. nEndPos[nEndPos.length-1] = nFileLength; ;f
Gi5=- } sTDBK!9I } ~m7+^c@, f&'md ZUycJ-[ //启动子线程 z~qQ@u| fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; $.Ni'U for(int i=0;i<nStartPos.length;i++) \=)h6AG { S%2qB;uw fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), mD!imq%= siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), 9EEHLx" nStartPos,nEndPos,i); `F#KXk Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); $)3/N&GXR fileSplitterFetch.start(); .;'xm_Gw< } ryN-d%t? // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), j*"s~8u4 siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); <Vim\ // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", 4/b#$o<I? nEndPos = " + nFileLength); IF=rD-x // fileSplitterFetch[nPos.length-1].start(); ?4_;9MkN ^:BRbp37i :.<&Y=^ //等待子线程结束 r"+
WUU //int count = 0; S<TfvQ\,"@ //是否结束while循环 o9/P/PZ\X boolean breakWhile = false; x{m)I<.: (<12&=WxE wZ^/- while(!bStop) 99 ["I: { sb1/4u/W write_nPos(); \ys3&<;b Utility.sleep(500); W6pS.} breakWhile = true; &IcDUr]L A)xI.Q6 ;(XSw%Y
H for(int i=0;i<nStartPos.length;i++) G 6][@q { z, OMR`W if(!fileSplitterFetch.bDownOver) &5B+8> { Y !`H_Qo breakWhile = false; Z1Ms~tch break; eu#| | } @t_<oOI2 } \R~Lf+q if(breakWhile) dgO2fI break; !o`al` q' vOqT Ld j1BYSfX' //count++; ?}W:DGudZ //if(count>4) ?B-aj // siteStop(); ,yB-jk? } D!:Qy@Zw <Sz9: hg- (vY10W{ System.err.println("文件下载结束!"); LE7o[<> } *@O;IiSE catch(Exception e){e.printStackTrace ();} l!oU9 } b&LhydaJ O".#B U8moVj8w1 //获得文件长度 !XK p_v public long getFileSize() #oHHKl=M { Wjj'yqBO^ int nFileLength = -1; .9`.\v6R try{ il:+O08_ URL url = new URL(siteInfoBean.getSSiteURL()); W] RxRdY6[ HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); +jHL==W& httpConnection.setRequestProperty("User-Agent","NetFox"); U7{,
* >:Rc%ILym b+w|3bQa int responseCode=httpConnection.getResponseCode(); #KiRH* giU if(responseCode>=400) ^fRA$t { U2G\GU1 X processErrorCode(responseCode); ]Fa VKC~3 return -2; //-2 represent access is error GLEGyT?~ } {~Phc 2z %R}}1 Rrs z{a
String sHeader; v=|ahsYC r l!c\ ,UY],;ib for(int i=1;;i++) {uq { ."9v1kW //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); @*F
NWT6 //Utility.log(in.readLine()); 1,Y-_e) sHeader=httpConnection.getHeaderFieldKey(i); *ozeoX'5D if(sHeader!=null) \vKMNk;kz { Zsaz#z|xW if(sHeader.equals("Content-Length")) y+@7k3" { FLi)EgZXt nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); N{f RZN break; {D$#m } j:rGFd } X5=Dc+ else u PjJ>v break; l\a 0 k4 } *V5R[ } $5:j" )$, catch(IOException e){e.printStackTrace ();} waldLb>7D catch(Exception e){e.printStackTrace ();} mI@]{K}Q% @MTm8E6au ShFSBD\M# Utility.log(nFileLength); GJU84Xn7 m%l\EE G|v{[>tr return nFileLength; 1%t9ic } GVe[)R X&pK#= Z_Hc":4i //保存下载信息(文件指针位置) b<NI6z8\ private void write_nPos() Bk*AO?3p { NO8)XJ3s try{ >`SIB; &>j output = new DataOutputStream(new FileOutputStream(tmpFile)); W/L~&.' output.writeInt(nStartPos.length); +.:- : for(int i=0;i<nStartPos.length;i++) |-%[Z {
I4,C-D // output.writeLong(nPos); L
slI!.( output.writeLong(fileSplitterFetch.nStartPos); :[?hU}9 output.writeLong(fileSplitterFetch.nEndPos); ?V3e;n } QJjqtOf> output.close(); h%9#~gJ}) } ZG"_M@S. catch(IOException e){e.printStackTrace ();} 5L'X3g
catch(Exception e){e.printStackTrace ();} s,)Z8H } .k|8nNj s sUWr=mD Cj#$WZga% //读取保存的下载信息(文件指针位置) >$j?2,Za(V private void read_nPos() !8(:G6Ne { |>Qj] try{ %77v'Pz1 DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); :q/%uca9 int nCount = input.readInt(); Q30AaG}f nStartPos = new long[nCount]; ]yiwdQ nEndPos = new long[nCount]; Ru9QQaHE for(int i=0;i<nStartPos.length;i++) yY_Zq\ { ZxFRE#y~2 nStartPos = input.readLong(); SfLZVB nEndPos = input.readLong(); D,b'1= } n** W input.close(); dZK/v } -fKo~\Pr catch(IOException e){e.printStackTrace ();}
T)?:q catch(Exception e){e.printStackTrace ();} h fZY5+Z< } la+RK P|%uB'|H <[Oe.0SGu private void processErrorCode(int nErrorCode) ia6%>^ { 6}4?,r System.err.println("Error Code : " + nErrorCode); ?5-Y'(r } ]-]K4*{ H3CG'?{ _ "NWILZwEV //停止文件下载 v"ZNS public void siteStop() ^,O%E;g^# { rO4R6A bStop = true; wX<w)@ for(int i=0;i<nStartPos.length;i++) [}:;B$, fileSplitterFetch.splitterStop(); DXA<m2&64N Z$jqB~=^e 5,dKha } c[VVCN8dA } 6)=`&>9 //负责部分文件的抓取 +guCTGD: **FileSplitterFetch.java 3ScOJo */ ^IW5c>;| package NetFox; r)<c
~\0 7 gOb"-;Zw M]|tXo$? import java.io.*; x
Zp` import java.net.*; |xYr0C[Pq k4T`{s}e HE!"3S2S&+ public class FileSplitterFetch extends Thread { ,i RUR8 qh9d.Q+n zH|YVg String sURL; //File URL D*=.;Rq long nStartPos; //File Snippet Start Position nIZ;N!r=i long nEndPos; //File Snippet End Position V_\9t8 int nThreadID; //Thread's ID ~cr##Ff5 boolean bDownOver = false; //Downing is over 2P,%}Ms boolean bStop = false; //Stop identical d!57`bVOd FileAccessI fileAccessI = null; //File Access interface L0\~K~q +-X
68` ?i{/iH~Sf public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException LO;7NK { Uv) B this.sURL = sURL; E4N/or this.nStartPos = nStart; 1u8 k} this.nEndPos = nEnd; =0t<:-?.- nThreadID = id; :_8Nf1B+T fileAccessI = new FileAccessI(sName,nStartPos);//定位 t1`.M$ } Talmc|h O,PTY^ +-r ~-b s public void run() gCV+amP { eC{St0 while(nStartPos < nEndPos && !bStop) 6n A/LW\x { yQcIfl]f N&yr?b'!-* 1,7 try{ 8-B6D~i URL url = new URL(sURL); 70<{tjyc HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); "l 8YD&q httpConnection.setRequestProperty("User-Agent","NetFox"); "T@9#7Obu String sProperty = "bytes="+nStartPos+"-"; 'pnOHT httpConnection.setRequestProperty("RANGE",sProperty); K+\2cf?bU Utility.log(sProperty); dL]wu!wE eC3 ~| G_O LzTdi%u$0| InputStream input = httpConnection.getInputStream(); QXu[<V //logResponseHead(httpConnection); !$NQF/Ol WJJmM*>JW Z'UhJu D5 byte[] b = new byte[1024]; }Uu#N H int nRead; hnimd~E52k while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) g4 3(N!@g { &gF9VY nStartPos += fileAccessI.write(b,0,nRead); [*J?TNk //if(nThreadID == 1) :85QwN]\ // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); TKp2C5bX } '':MhRb $[g#P^ JU#m?4g Utility.log("Thread " + nThreadID + " is over!"); I5@8=rFk bDownOver = true; B.C:06E5 //nPos = fileAccessI.write (b,0,nRead); cd|/4L6 } IISdC(5 catch(Exception e){e.printStackTrace ();} Vx{
} WMa`!Q } ||L^yI~_d &5[B\yv nAC>']K4$ //打印回应的头信息 mp)+wZAN& public void logResponseHead(HttpURLConnection con) v\@pZw=x { dT0>\9ZNr for(int i=1;;i++) vb|
d { D\Y,2!I String header=con.getHeaderFieldKey(i); S5kD|kJ if(header!=null) LzxO=+=9!q //responseHeaders.put(header,httpConnection.getHeaderField(header)); 8|(],NyEJ Utility.log(header+" : "+con.getHeaderField(header)); ~{GTL_w else :p%#U$S4 break; +z[+kir } D |=L)\ } UhJ{MUH` SOZs!9oi )PkW,214# public void splitterStop() @?jtB { )FSEHQ bStop = true; t,n2N13 } XG!6[o; c39j|/!;Y l<p<\,nV$ } ~MP |L?my S.{
,!, tU7-H /* Sl-9im1 **FileAccess.java r\cY R}v *//文件访问(定位,写) -k@1#c+z package NetFox; 6$0<&')Yb import java.io.*; 5dhy80|g] `!spi=f rW090Py public class FileAccessI implements Serializable{ [?hvx} xXc>YTK' //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 rHM^_sYRb RandomAccessFile oSavedFile; |N^"?bSt long nPos; SQhVdYU1' <f`n[QD2z BU4IN$d0Po public FileAccessI() throws IOException g$jT P#%b { &AOGg\ this("",0); [& Z-
*a } ;c>"gW8 {%CW!Rc <R+?>kz6 public FileAccessI(String sName,long nPos) throws IOException Q"B8l[ { wViTMlq oSavedFile = new RandomAccessFile(sName,"rw"); nu7 R this.nPos = nPos; FZO&r60$E oSavedFile.seek(nPos); N$=9R } t$%<eF@w u
z7|!G!43 Lui6;NY public synchronized int write(byte[] b,int nStart,int nLen) 1Ml<> { +uSp3gE" int n = -1; CQNMCYjg(R try{ <tBT?#C9+ oSavedFile.write(b,nStart,nLen); 9 " t;6 n = nLen; z@,(^~C_ } Z$g'h1,zW catch(IOException e) ?d3FR! { u<uc"KY= e.printStackTrace (); \Cu=Le^ } i+qg*o$ 05k'TqT{c >\^oCbqF}~ return n; Pj]^p{> } (3mL!1\ p<(a);<L @'}2xw[eU } ]7cciob .%{B=_7 Y,v9o /* S*=^I2; **SiteInfoBean.java LdH1sHy*d` */ 3o[(pfcU package NetFox; >qB`03> ?g{[U0) pP1DR' public class SiteInfoBean { ?wPTe^Qtv i8k} B
o C5-u86F private String sSiteURL; //Site's URL \t1#5 private String sFilePath; //Saved File's Path n]Yz<# private String sFileName; //Saved File's Name eu" m0Q private int nSplitter; //Count of Splited Downloading File oNe:<YT
iB(?}SaAZ w-ald?` public SiteInfoBean() fcEm:jEZ* {//nSplitter的缺省值为5 &WBpd}|+Y //default value of nSplitter is 5 &! h~UZ this("","","",5); )L6
it }
..E_M$} 9ybR+dGm+ Z(c
SM public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) PdVx&BL* { ?i0+h7=6 sSiteURL= sURL; :t!J
9 sFilePath = sPath; PvV\b<Pe+ sFileName = sName; rgCC3TX this.nSplitter = nSpiltter; /klo),|& ~y"R{-%uS ?]Hs~n- } (^FMm1@T [[^r;XKQ 0@b<?Ms9 public String getSSiteURL() $peL1'Evo { XrTc5V return sSiteURL; h ChO } 9C,gJp}P NpZ'pBl 9ThsR&h3 public void setSSiteURL(String value) QxE%C { guYP| sSiteURL = value; -M6vg4gf } EiC["M'} g]HxPq+O A\rY~$Vr public String getSFilePath() *!y04'p`< { N?{Zrff2"O return sFilePath; vb0Ca+}} } y~#5!:Be <ZZfN@6 SGZYDxFC@ public void setSFilePath(String value) c/bT5TIEWs { xC _3&. sFilePath = value; |>j^$^l~ } [7`S`\_NK uv$5MwKU /rD9) public String getSFileName() OI)k0t^;D { wjX0r7^@ return sFileName; n~`jUML2d } 8cY5:plK
qfFa" a !?i9fYu public void setSFileName(String value) ;MYK TE>m { jK6dI
7h sFileName = value; }W " i{s/ } r\b$/:y<e ]OKKR/: U/U_q-z] public int getNSplitter() [C
7X#| { DP*V|) return nSplitter; ,bzgjw+R5 } Q"pZPpl& k~<ORnda !_o1;GzK public void setNSplitter(int nCount) QB*AQ5- { P1TTaYu nSplitter = nCount; q,Nqv[va } !C' Y
7 } }236{)DuN 2+(SR.oGq [F *hjGLc} /* "wV7PSbM **Utility.java 8.`5"9Vh */
3=L5Y/ package NetFox; SV2\vby}C LGRhCOP: C0e oV} public class Utility { y3'K+?4 viS7+E|O ir)~T0 public Utility() ap|V}jC { >?X(,c x2]chN .a]av } _32 o7}!x L|2WTyMU //线程睡眠 <M3&\ public static void sleep(int nSecond) &ujq6~# { pvqbk2BO try{ ?O
e, Thread.sleep(nSecond); ~ln96*)M; } ^MZ9Zu_ catch(Exception e) g>f_'7F& { +-:G+9L@ e.printStackTrace (); +u7nx } FVHR } a*@4W3;7 b;(BMO,( //日志 G?yG|5.pU public static void log(String sMsg) !='&#@7u { ATU] KL!{ System.err.println(sMsg); 0(!=N1l } gtb,}T=1 F,
p~O{
Q _/[(&}M public static void log(int sMsg) }W R?n { _Nq7_iT0 System.err.println(sMsg); iX'#~eK*< } 3HmJixy } RV+0C&0ff 7(= 09z 6/ thhP3`- /* SA16Ng **TestMethod.java Z\M8DZW8Y */ A 4|a{\|$ package NetFox; gkDlh{ `~3y[j]kO !
.|\}= [e public class TestMethod { ZiOL7#QWX d>NM4n[h8 8L*P!j9`EY public TestMethod() pO_L,~< { ///xx/weblogic60b2_win.exe C_DXg-a2lu try{ S+(-k0 SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); ]p2M!N,? //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); {m+(j (6- SiteFileFetch fileFetch = new SiteFileFetch(bean); &ahZ_9Q fileFetch.start(); ^.@BD4/RPt } 9Iod[ x catch(Exception e){e.printStackTrace ();} (AnM_s $R[ggH& ]2P*Z6Az } &qP&=( $ 36U
zfBa 2,X~a;+ public static void main(String[] args) #A2)]XvY { Xr@]7: , new TestMethod(); u/BCl!` } zLxO\R!d } @dzO{) 点击下载更多相关资料
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