code/ajaxterm.py

   1 #!/usr/bin/env python
   2
   3 """ Ajaxterm """
   4
   5 import array,cgi,fcntl,glob,mimetypes,optparse,os,pty,random,re,signal,select,sys,threading,time,termios,struct,pwd
   6
   7 os.chdir(os.path.normpath(os.path.dirname(__file__)))
   8 # Optional: Add QWeb in sys path
   9 sys.path[0:0]=glob.glob('../../python')
  10
  11 import qweb
  12
  13 class Terminal:
  14         def __init__(self,width=80,height=24):
  15                 self.width=width
  16                 self.height=height
  17                 self.init()
  18                 self.reset()
  19         def init(self):
  20                 self.esc_seq={
  21                         "\x00": None,
  22                         "\x05": self.esc_da,
  23                         "\x07": None,
  24                         "\x08": self.esc_0x08,
  25                         "\x09": self.esc_0x09,
  26                         "\x0a": self.esc_0x0a,
  27                         "\x0b": self.esc_0x0a,
  28                         "\x0c": self.esc_0x0a,
  29                         "\x0d": self.esc_0x0d,
  30                         "\x0e": None,
  31                         "\x0f": None,
  32                         "\x1b#8": None,
  33                         "\x1b=": None,
  34                         "\x1b>": None,
  35                         "\x1b(0": None,
  36                         "\x1b(A": None,
  37                         "\x1b(B": None,
  38                         "\x1b[c": self.esc_da,
  39                         "\x1b[0c": self.esc_da,
  40                         "\x1b]R": None,
  41                         "\x1b7": self.esc_save,
  42                         "\x1b8": self.esc_restore,
  43                         "\x1bD": None,
  44                         "\x1bE": None,
  45                         "\x1bH": None,
  46                         "\x1bM": self.esc_ri,
  47                         "\x1bN": None,
  48                         "\x1bO": None,
  49                         "\x1bZ": self.esc_da,
  50                         "\x1ba": None,
  51                         "\x1bc": self.reset,
  52                         "\x1bn": None,
  53                         "\x1bo": None,
  54                 }
  55                 for k,v in self.esc_seq.items():
  56                         if v==None:
  57                                 self.esc_seq[k]=self.esc_ignore
  58                 # regex
  59                 d={
  60                         r'\[\??([0-9;]*)([@ABCDEFGHJKLMPXacdefghlmnqrstu`])' : self.csi_dispatch,
  61                         r'\]([^\x07]+)\x07' : self.esc_ignore,
  62                 }
  63                 self.esc_re=[]
  64                 for k,v in d.items():
  65                         self.esc_re.append((re.compile('\x1b'+k),v))
  66                 # define csi sequences
  67                 self.csi_seq={
  68                         '@': (self.csi_at,[1]),
  69                         '`': (self.csi_G,[1]),
  70                         'J': (self.csi_J,[0]),
  71                         'K': (self.csi_K,[0]),
  72                 }
  73                 for i in [i[4] for i in dir(self) if i.startswith('csi_') and len(i)==5]:
  74                         if not self.csi_seq.has_key(i):
  75                                 self.csi_seq[i]=(getattr(self,'csi_'+i),[1])
  76                 # Init 0-256 to latin1 and html translation table
  77                 self.trl1=""
  78                 for i in range(256):
  79                         if i<32:
  80                                 self.trl1+=" "
  81                         elif i<127 or i>160:
  82                                 self.trl1+=chr(i)
  83                         else:
  84                                 self.trl1+="?"
  85                 self.trhtml=""
  86                 for i in range(256):
  87                         if i==0x0a or (i>32 and i<127) or i>160:
  88                                 self.trhtml+=chr(i)
  89                         elif i<=32:
  90                                 self.trhtml+="\xa0"
  91                         else:
  92                                 self.trhtml+="?"
  93         def reset(self,s=""):
  94                 self.scr=array.array('i',[0x000700]*(self.width*self.height))
  95                 self.st=0
  96                 self.sb=self.height-1
  97                 self.cx_bak=self.cx=0
  98                 self.cy_bak=self.cy=0
  99                 self.cl=0
 100                 self.sgr=0x000700
 101                 self.buf=""
 102                 self.outbuf=""
 103                 self.last_html=""
 104         def peek(self,y1,x1,y2,x2):
 105                 return self.scr[self.width*y1+x1:self.width*y2+x2]
 106         def poke(self,y,x,s):
 107                 pos=self.width*y+x
 108                 self.scr[pos:pos+len(s)]=s
 109         def zero(self,y1,x1,y2,x2):
 110                 w=self.width*(y2-y1)+x2-x1+1
 111                 z=array.array('i',[0x000700]*w)
 112                 self.scr[self.width*y1+x1:self.width*y2+x2+1]=z
 113         def scroll_up(self,y1,y2):
 114                 self.poke(y1,0,self.peek(y1+1,0,y2,self.width))
 115                 self.zero(y2,0,y2,self.width-1)
 116         def scroll_down(self,y1,y2):
 117                 self.poke(y1+1,0,self.peek(y1,0,y2-1,self.width))
 118                 self.zero(y1,0,y1,self.width-1)
 119         def scroll_right(self,y,x):
 120                 self.poke(y,x+1,self.peek(y,x,y,self.width))
 121                 self.zero(y,x,y,x)
 122         def cursor_down(self):
 123                 if self.cy>=self.st and self.cy<=self.sb:
 124                         self.cl=0
 125                         q,r=divmod(self.cy+1,self.sb+1)
 126                         if q:
 127                                 self.scroll_up(self.st,self.sb)
 128                                 self.cy=self.sb
 129                         else:
 130                                 self.cy=r
 131         def cursor_right(self):
 132                 q,r=divmod(self.cx+1,self.width)
 133                 if q:
 134                         self.cl=1
 135                 else:
 136                         self.cx=r
 137         def echo(self,c):
 138                 if self.cl:
 139                         self.cursor_down()
 140                         self.cx=0
 141                 self.scr[(self.cy*self.width)+self.cx]=self.sgr|ord(c)
 142                 self.cursor_right()
 143         def esc_0x08(self,s):
 144                 self.cx=max(0,self.cx-1)
 145         def esc_0x09(self,s):
 146                 x=self.cx+8
 147                 q,r=divmod(x,8)
 148                 self.cx=(q*8)%self.width
 149         def esc_0x0a(self,s):
 150                 self.cursor_down()
 151         def esc_0x0d(self,s):
 152                 self.cl=0
 153                 self.cx=0
 154         def esc_save(self,s):
 155                 self.cx_bak=self.cx
 156                 self.cy_bak=self.cy
 157         def esc_restore(self,s):
 158                 self.cx=self.cx_bak
 159                 self.cy=self.cy_bak
 160                 self.cl=0
 161         def esc_da(self,s):
 162                 self.outbuf="\x1b[?6c"
 163         def esc_ri(self,s):
 164                 self.cy=max(self.st,self.cy-1)
 165                 if self.cy==self.st:
 166                         self.scroll_down(self.st,self.sb)
 167         def esc_ignore(self,*s):
 168                 pass
 169 #               print "term:ignore: %s"%repr(s)
 170         def csi_dispatch(self,seq,mo):
 171         # CSI sequences
 172                 s=mo.group(1)
 173                 c=mo.group(2)
 174                 f=self.csi_seq.get(c,None)
 175                 if f:
 176                         try:
 177                                 l=[min(int(i),1024) for i in s.split(';') if len(i)<4]
 178                         except ValueError:
 179                                 l=[]
 180                         if len(l)==0:
 181                                 l=f[1]
 182                         f[0](l)
 183 #               else:
 184 #                       print 'csi ignore',c,l
 185         def csi_at(self,l):
 186                 for i in range(l[0]):
 187                         self.scroll_right(self.cy,self.cx)
 188         def csi_A(self,l):
 189                 self.cy=max(self.st,self.cy-l[0])
 190         def csi_B(self,l):
 191                 self.cy=min(self.sb,self.cy+l[0])
 192         def csi_C(self,l):
 193                 self.cx=min(self.width-1,self.cx+l[0])
 194                 self.cl=0
 195         def csi_D(self,l):
 196                 self.cx=max(0,self.cx-l[0])
 197                 self.cl=0
 198         def csi_E(self,l):
 199                 self.csi_B(l)
 200                 self.cx=0
 201                 self.cl=0
 202         def csi_F(self,l):
 203                 self.csi_A(l)
 204                 self.cx=0
 205                 self.cl=0
 206         def csi_G(self,l):
 207                 self.cx=min(self.width,l[0])-1
 208         def csi_H(self,l):
 209                 if len(l)<2: l=[1,1]
 210                 self.cx=min(self.width,l[1])-1
 211                 self.cy=min(self.height,l[0])-1
 212                 self.cl=0
 213         def csi_J(self,l):
 214                 if l[0]==0:
 215                         self.zero(self.cy,self.cx,self.height-1,self.width-1)
 216                 elif l[0]==1:
 217                         self.zero(0,0,self.cy,self.cx)
 218                 elif l[0]==2:
 219                         self.zero(0,0,self.height-1,self.width-1)
 220         def csi_K(self,l):
 221                 if l[0]==0:
 222                         self.zero(self.cy,self.cx,self.cy,self.width-1)
 223                 elif l[0]==1:
 224                         self.zero(self.cy,0,self.cy,self.cx)
 225                 elif l[0]==2:
 226                         self.zero(self.cy,0,self.cy,self.width-1)
 227         def csi_L(self,l):
 228                 for i in range(l[0]):
 229                         if self.cy<self.sb:
 230                                 self.scroll_down(self.cy,self.sb)
 231         def csi_M(self,l):
 232                 if self.cy>=self.st and self.cy<=self.sb:
 233                         for i in range(l[0]):
 234                                 self.scroll_up(self.cy,self.sb)
 235         def csi_P(self,l):
 236                 w,cx,cy=self.width,self.cx,self.cy
 237                 end=self.peek(cy,cx,cy,w)
 238                 self.csi_K([0])
 239                 self.poke(cy,cx,end[l[0]:])
 240         def csi_X(self,l):
 241                 self.zero(self.cy,self.cx,self.cy,self.cx+l[0])
 242         def csi_a(self,l):
 243                 self.csi_C(l)
 244         def csi_c(self,l):
 245                 #'\x1b[?0c' 0-8 cursor size
 246                 pass
 247         def csi_d(self,l):
 248                 self.cy=min(self.height,l[0])-1
 249         def csi_e(self,l):
 250                 self.csi_B(l)
 251         def csi_f(self,l):
 252                 self.csi_H(l)
 253         def csi_h(self,l):
 254                 if l[0]==4:
 255                         pass
 256 #                       print "insert on"
 257         def csi_l(self,l):
 258                 if l[0]==4:
 259                         pass
 260 #                       print "insert off"
 261         def csi_m(self,l):
 262                 for i in l:
 263                         if i==0 or i==39 or i==49 or i==27:
 264                                 self.sgr=0x000700
 265                         elif i==1:
 266                                 self.sgr=(self.sgr|0x000800)
 267                         elif i==7:
 268                                 self.sgr=0x070000
 269                         elif i>=30 and i<=37:
 270                                 c=i-30
 271                                 self.sgr=(self.sgr&0xff08ff)|(c<<8)
 272                         elif i>=40 and i<=47:
 273                                 c=i-40
 274                                 self.sgr=(self.sgr&0x00ffff)|(c<<16)
 275 #                       else:
 276 #                               print "CSI sgr ignore",l,i
 277 #               print 'sgr: %r %x'%(l,self.sgr)
 278         def csi_r(self,l):
 279                 if len(l)<2: l=[0,self.height]
 280                 self.st=min(self.height-1,l[0]-1)
 281                 self.sb=min(self.height-1,l[1]-1)
 282                 self.sb=max(self.st,self.sb)
 283         def csi_s(self,l):
 284                 self.esc_save(0)
 285         def csi_u(self,l):
 286                 self.esc_restore(0)
 287         def escape(self):
 288                 e=self.buf
 289                 if len(e)>32:
 290 #                       print "error %r"%e
 291                         self.buf=""
 292                 elif e in self.esc_seq:
 293                         self.esc_seq[e](e)
 294                         self.buf=""
 295                 else:
 296                         for r,f in self.esc_re:
 297                                 mo=r.match(e)
 298                                 if mo:
 299                                         f(e,mo)
 300                                         self.buf=""
 301                                         break
 302 #               if self.buf=='': print "ESC %r\n"%e
 303         def write(self,s):
 304                 for i in s:
 305                         if len(self.buf) or (i in self.esc_seq):
 306                                 self.buf+=i
 307                                 self.escape()
 308                         elif i == '\x1b':
 309                                 self.buf+=i
 310                         else:
 311                                 self.echo(i)
 312         def read(self):
 313                 b=self.outbuf
 314                 self.outbuf=""
 315                 return b
 316         def dump(self):
 317                 r=''
 318                 for i in self.scr:
 319                         r+=chr(i&255)
 320                 return r
 321         def dumplatin1(self):
 322                 return self.dump().translate(self.trl1)
 323         def dumphtml(self,color=1):
 324                 h=self.height
 325                 w=self.width
 326                 r=""
 327                 span=""
 328                 span_bg,span_fg=-1,-1
 329                 for i in range(h*w):
 330                         q,c=divmod(self.scr[i],256)
 331                         if color:
 332                                 bg,fg=divmod(q,256)
 333                         else:
 334                                 bg,fg=0,7
 335                         if i==self.cy*w+self.cx:
 336                                 bg,fg=1,7
 337                         if (bg!=span_bg or fg!=span_fg or i==h*w-1):
 338                                 if len(span):
 339                                         r+='<span class="f%d b%d">%s</span>'%(span_fg,span_bg,cgi.escape(span.translate(self.trhtml)))
 340                                 span=""
 341                                 span_bg,span_fg=bg,fg
 342                         span+=chr(c)
 343                         if i%w==w-1:
 344                                 span+='\n'
 345                 r='<?xml version="1.0" encoding="ISO-8859-1"?><pre class="term">%s</pre>'%r
 346                 if self.last_html==r:
 347                         return '<?xml version="1.0"?><idem></idem>'
 348                 else:
 349                         self.last_html=r
 350 #                       print self
 351                         return r
 352         def __repr__(self):
 353                 d=self.dumplatin1()
 354                 r=""
 355                 for i in range(self.height):
 356                         r+="|%s|\n"%d[self.width*i:self.width*(i+1)]
 357                 return r
 358
 359 class SynchronizedMethod:
 360         def __init__(self,lock,orig):
 361                 self.lock=lock
 362                 self.orig=orig
 363         def __call__(self,*l):
 364                 self.lock.acquire()
 365                 r=self.orig(*l)
 366                 self.lock.release()
 367                 return r
 368
 369 class Multiplex:
 370         def __init__(self):
 371                 self.proc={}
 372                 self.lock=threading.RLock()
 373                 self.thread=threading.Thread(target=self.loop)
 374                 self.thread.daemon=True
 375                 self.alive=1
 376                 # synchronize methods
 377                 for name in ['create','fds','proc_read','proc_write','dump','die','run']:
 378                         orig=getattr(self,name)
 379                         setattr(self,name,SynchronizedMethod(self.lock,orig))
 380                 self.thread.start()
 381         def create(self,cmd,w=80,h=25):
 382                 pid,fd=pty.fork()
 383                 if pid==0:
 384                         try:
 385                                 fdl=[int(i) for i in os.listdir('/proc/self/fd')]
 386                         except OSError:
 387                                 fdl=range(256)
 388                         for i in [i for i in fdl if i>2]:
 389                                 try:
 390                                         os.close(i)
 391                                 except OSError:
 392                                         pass
 393                         env={}
 394                         env["COLUMNS"]=str(w)
 395                         env["LINES"]=str(h)
 396                         env["TERM"]="linux"
 397                         env["PATH"]=os.environ['PATH']
 398                         os.execvpe(cmd[0],cmd,env)
 399                 else:
 400                         fcntl.fcntl(fd, fcntl.F_SETFL, os.O_NONBLOCK)
 401                         # python bug http://python.org/sf/1112949 on amd64
 402                         fcntl.ioctl(fd, struct.unpack('i',struct.pack('I',termios.TIOCSWINSZ))[0], struct.pack("HHHH",h,w,0,0))
 403                         self.proc[fd]={'pid':pid,'term':Terminal(w,h),'buf':'','time':time.time()}
 404                         return fd
 405         def die(self):
 406                 self.alive=0
 407         def run(self):
 408                 return self.alive
 409         def fds(self):
 410                 return self.proc.keys()
 411         def proc_kill(self,fd):
 412                 if fd in self.proc:
 413                         self.proc[fd]['time']=0
 414                 t=time.time()
 415                 for i in self.proc.keys():
 416                         t0=self.proc[i]['time']
 417                         if (t-t0)>120:
 418                                 try:
 419                                         os.close(i)
 420                                         os.kill(self.proc[i]['pid'],signal.SIGTERM)
 421                                 except (IOError,OSError):
 422                                         pass
 423                                 del self.proc[i]
 424         def proc_read(self,fd):
 425                 try:
 426                         t=self.proc[fd]['term']
 427                         t.write(os.read(fd,65536))
 428                         reply=t.read()
 429                         if reply:
 430                                 os.write(fd,reply)
 431                         self.proc[fd]['time']=time.time()
 432                 except (KeyError,IOError,OSError):
 433                         self.proc_kill(fd)
 434         def proc_write(self,fd,s):
 435                 try:
 436                         os.write(fd,s)
 437                 except (IOError,OSError):
 438                         self.proc_kill(fd)
 439         def dump(self,fd,color=1):
 440                 try:
 441                         return self.proc[fd]['term'].dumphtml(color)
 442                 except KeyError:
 443                         return False
 444         def loop(self):
 445                 while self.run():
 446                         fds=self.fds()
 447                         i,o,e=select.select(fds, [], [], 1.0)
 448                         for fd in i:
 449                                 self.proc_read(fd)
 450                         if len(i):
 451                                 time.sleep(0.002)
 452                 for i in self.proc.keys():
 453                         try:
 454                                 os.close(i)
 455                                 os.kill(self.proc[i]['pid'],signal.SIGTERM)
 456                         except (IOError,OSError):
 457                                 pass
 458
 459 class AjaxTerm:
 460         def __init__(self,cmd=None,index_file='ajaxterm.html'):
 461                 self.files={}
 462                 for i in ['css','html','js']:
 463                         for j in glob.glob('*.%s'%i):
 464                                 self.files[j]=file(j).read()
 465                 self.files['index']=file(index_file).read()
 466                 self.mime = mimetypes.types_map.copy()
 467                 self.mime['.html']= 'text/html; charset=UTF-8'
 468                 self.multi = Multiplex(cmd)
 469                 self.session = {}
 470         def __call__(self, environ, start_response):
 471                 req = qweb.QWebRequest(environ, start_response,session=None)
 472                 if req.PATH_INFO.endswith('/u'):
 473                         s=req.REQUEST["s"]
 474                         k=req.REQUEST["k"]
 475                         c=req.REQUEST["c"]
 476                         w=req.REQUEST.int("w")
 477                         h=req.REQUEST.int("h")
 478                         if s in self.session:
 479                                 term=self.session[s]
 480                         else:
 481                                 if not (w>2 and w<256 and h>2 and h<100):
 482                                         w,h=80,25
 483                                 term=self.session[s]=self.multi.create(w,h)
 484                         if k:
 485                                 self.multi.proc_write(term,k)
 486                         time.sleep(0.002)
 487                         dump=self.multi.dump(term,c)
 488                         req.response_headers['Content-Type']='text/xml'
 489                         if isinstance(dump,str):
 490                                 req.write(dump)
 491                                 req.response_gzencode=1
 492                         else:
 493                                 del self.session[s]
 494                                 req.write('<?xml version="1.0"?><idem></idem>')
 495 #                       print "sessions %r"%self.session
 496                 else:
 497                         n=os.path.basename(req.PATH_INFO)
 498                         if n in self.files:
 499                                 req.response_headers['Content-Type'] = self.mime.get(os.path.splitext(n)[1].lower(), 'application/octet-stream')
 500                                 req.write(self.files[n])
 501                         else:
 502                                 req.response_headers['Content-Type'] = 'text/html; charset=UTF-8'
 503                                 req.write(self.files['index'])
 504                 return req
 505
 506 def main():
 507         parser = optparse.OptionParser()
 508         parser.add_option("-p", "--port", dest="port", default="8022", help="Set the TCP port (default: 8022)")
 509         parser.add_option("-c", "--command", dest="cmd", default=None,help="set the command (default: /bin/login or ssh localhost)")
 510         parser.add_option("-l", "--log", action="store_true", dest="log",default=0,help="log requests to stderr (default: quiet mode)")
 511         parser.add_option("-d", "--daemon", action="store_true", dest="daemon", default=0, help="run as daemon in the background")
 512         parser.add_option("-P", "--pidfile",dest="pidfile",default="/var/run/ajaxterm.pid",help="set the pidfile (default: /var/run/ajaxterm.pid)")
 513         parser.add_option("-i", "--index", dest="index_file", default="ajaxterm.html",help="default index file (default: ajaxterm.html)")
 514         parser.add_option("-u", "--uid", dest="uid", help="Set the daemon's user id")
 515         (o, a) = parser.parse_args()
 516         if o.daemon:
 517                 pid=os.fork()
 518                 if pid == 0:
 519                         #os.setsid() ?
 520                         os.setpgrp()
 521                         nullin = file('/dev/null', 'r')
 522                         nullout = file('/dev/null', 'w')
 523                         os.dup2(nullin.fileno(), sys.stdin.fileno())
 524                         os.dup2(nullout.fileno(), sys.stdout.fileno())
 525                         os.dup2(nullout.fileno(), sys.stderr.fileno())
 526                         if os.getuid()==0 and o.uid:
 527                                 try:
 528                                         os.setuid(int(o.uid))
 529                                 except:
 530                                         os.setuid(pwd.getpwnam(o.uid).pw_uid)
 531                 else:
 532                         try:
 533                                 file(o.pidfile,'w+').write(str(pid)+'\n')
 534                         except:
 535                                 pass
 536                         print 'AjaxTerm at http://localhost:%s/ pid: %d' % (o.port,pid)
 537                         sys.exit(0)
 538         else:
 539                 print 'AjaxTerm at http://localhost:%s/' % o.port
 540         at=AjaxTerm(o.cmd,o.index_file)
 541 #       f=lambda:os.system('firefox http://localhost:%s/&'%o.port)
 542 #       qweb.qweb_wsgi_autorun(at,ip='localhost',port=int(o.port),threaded=0,log=o.log,callback_ready=None)
 543         try:
 544                 qweb.QWebWSGIServer(at,ip='localhost',port=int(o.port),threaded=0,log=o.log).serve_forever()
 545         except KeyboardInterrupt,e:
 546                 sys.excepthook(*sys.exc_info())
 547         at.multi.die()
 548
 549 if __name__ == '__main__':
 550         main()
 551