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,
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3
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1
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,
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1
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51
139
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13
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1
9
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3
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1
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In
stit
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C
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A
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:
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I
NT
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O
N
R
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tim
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web
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p
licatio
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in
v
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lv
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clien
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wh
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ls
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k
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as
a
b
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th
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m
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[
1
]
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An
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Hy
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HT
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.
Af
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Dec
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3
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–
151
140
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o
r
s
er
v
er
,
W
eb
So
ck
et
h
as
b
ee
n
u
s
ed
to
d
em
o
n
s
tr
ate
an
ef
f
ec
tu
al
R
ea
ltime
web
.
W
eb
So
ck
et
p
r
o
v
id
e
a
p
er
s
is
ten
t
co
n
n
ec
tio
n
b
etwe
en
a
clien
t
a
n
d
s
er
v
er
th
at
b
o
th
p
ar
ties
ca
n
u
s
e
t
o
s
tar
t
s
en
d
in
g
d
ata
at
an
y
tim
e.
T
h
e
clien
t
estab
lis
h
es
a
W
eb
So
ck
et
co
n
n
ec
tio
n
th
r
o
u
g
h
a
p
r
o
ce
s
s
k
n
o
w
n
as
th
e
W
eb
So
c
k
et
h
an
d
s
h
ak
e.
T
h
is
p
r
o
ce
s
s
s
tar
ts
with
th
e
clien
t
s
en
d
in
g
a
r
e
g
u
lar
HT
T
P
r
e
q
u
est
to
th
e
s
er
v
er
.
T
h
e
W
eb
s
tar
ted
o
u
t
as
a
s
im
p
le
d
o
cu
m
en
t
s
h
ar
in
g
s
er
v
ice
to
m
ak
e
th
e
liv
es
o
f
r
esear
ch
er
s
s
im
p
ler
.
T
h
e
tr
an
s
itio
n
in
to
t
h
e
W
eb
o
f
to
d
ay
h
as
b
ee
n
m
a
d
e
p
o
s
s
ib
le
b
y
th
e
f
ac
t
th
at
it
b
ec
am
e
c
ap
ab
le
o
f
r
ea
l
-
tim
e
u
p
d
ates.
T
h
e
r
ea
l
-
tim
e
web
en
ab
les a
web
s
ite
to
u
p
d
ate
its
elf
d
y
n
am
ically
w
h
en
n
ew
c
o
n
te
n
t
is
av
ailab
le.
T
h
e
f
o
llo
win
g
two
ex
am
p
les illu
s
tr
ate
th
e
m
ea
n
in
g
o
f
th
e
ter
m
r
ea
l
-
tim
e:
-
A
s
to
ck
p
r
ice
a
p
p
licatio
n
wh
e
r
e
s
ev
er
al
clien
ts
co
n
n
ec
t
to
a
s
er
v
er
.
A
s
to
ck
a
p
p
licatio
n
is
a
s
y
m
b
o
l
wh
ic
h
is
u
s
ed
to
u
n
iq
u
ely
id
en
tify
co
m
p
an
y
s
to
ck
.
T
h
is
s
to
ck
p
r
ice
s
er
v
er
s
u
b
s
cr
ib
es
to
a
b
r
o
k
er
b
ac
k
en
d
f
o
r
s
to
ck
p
r
ice
u
p
d
ates.
W
h
en
th
e
s
to
ck
p
r
ice
s
er
v
er
r
ec
eiv
es
p
r
ice
u
p
d
ates
f
r
o
m
th
e
b
ac
k
e
n
d
,
it
b
r
o
ad
ca
s
ts
th
ese
to
all
clien
ts
.
-
A
ch
at
r
o
o
m
ap
p
licatio
n
wh
er
e
s
ev
er
al
clien
ts
co
n
n
ec
t
to
a
ce
n
tr
alize
d
s
er
v
er
.
T
h
e
s
er
v
er
lis
ten
s
f
o
r
clien
t
m
ess
ag
es
an
d
as
s
o
o
n
as
a
clien
t
s
en
d
s
a
m
ess
ag
e
to
th
e
s
er
v
er
,
th
e
s
er
v
er
im
m
e
d
iately
b
r
o
ad
ca
s
ts
th
e
m
ess
ag
e
to
all
o
th
er
co
n
n
ec
ted
clien
ts
.
B
o
th
ex
am
p
les
s
h
o
w
th
at
d
ata
is
h
an
d
led
an
d
d
is
tr
ib
u
t
ed
im
m
ed
iately
af
ter
it
is
r
ec
eiv
ed
,
wh
ich
is
w
h
at
is
m
ea
n
t
b
y
th
e
ter
m
r
ea
l
-
ti
m
e
in
th
is
r
esear
ch
.
T
h
e
f
ir
s
t
ex
am
p
le
r
e
q
u
ir
es
u
n
id
ir
ec
tio
n
al
m
ess
ag
in
g
,
w
ith
s
to
ck
p
r
ices
o
n
ly
g
o
in
g
s
er
v
er
-
to
-
clien
t.
T
h
e
s
ec
o
n
d
ex
am
p
le
is
b
id
ir
ec
tio
n
al,
r
e
q
u
ir
in
g
b
o
t
h
s
er
v
er
-
to
-
clien
t a
n
d
clien
t
-
to
-
s
e
r
v
er
m
ess
ag
in
g
.
E
v
en
th
o
u
g
h
r
ea
l
-
tim
e
ca
p
a
b
ilit
ies
wer
e
n
o
t
c
o
n
s
id
er
ed
wh
en
th
e
W
eb
was
d
esig
n
e
d
,
th
e
r
e
a
r
e
s
ev
er
al
way
s
to
u
s
e
tr
ad
itio
n
al
HT
T
P
in
o
r
d
e
r
to
ac
h
iev
e
n
ea
r
r
ea
l
-
ti
m
e
u
p
d
ates,
s
u
ch
as
th
e
tech
n
i
q
u
es
L
o
n
g
Po
llin
g
an
d
Stre
am
in
g
.
R
ec
en
tly
,
with
th
e
n
ew
p
r
o
to
c
o
l
W
eb
So
ck
et
an
d
th
e
n
ew
HT
T
P
-
b
ased
tech
n
o
lo
g
y
Ser
v
er
-
Sen
t
E
v
en
ts
,
a
tr
u
e
r
ea
l
-
tim
e
web
is
p
o
s
s
ib
le.
T
h
is
r
esear
ch
will
th
er
ef
o
r
e
f
o
c
u
s
o
n
W
eb
So
ck
et,
Ser
v
er
-
Sen
t
E
v
en
ts
,
an
d
HT
T
P L
o
n
g
Po
llin
g
.
Ser
v
er
-
Sen
t E
v
en
ts
an
d
L
o
n
g
Po
llin
g
ar
e
b
o
th
u
n
id
ir
ec
tio
n
al
(
s
er
v
er
-
to
-
clien
t)
wh
ile
W
eb
So
ck
et
is
b
id
ir
ec
tio
n
al
(
s
e
r
v
er
-
to
-
clien
t
an
d
clien
t
-
to
-
s
er
v
er
)
.
Fo
r
s
im
p
licity
’
s
s
ak
e,
th
is
p
ap
er
will
r
ef
er
to
th
e
r
ea
l
-
tim
e
d
eliv
er
i
n
g
tech
n
o
lo
g
ies as tr
an
s
p
o
r
ts
.
I
t is b
eli
ev
ed
th
at
W
eb
So
ck
et
p
e
r
f
o
r
m
s
b
etter
th
an
HT
T
P.
T
h
e
p
r
o
b
lem
with
all
o
f
o
ld
-
s
ty
le
r
ea
l
-
tim
e
co
m
m
u
n
icatio
n
is
th
at
th
ey
ca
r
r
y
th
e
o
v
er
h
ea
d
o
f
HT
T
P.
E
v
er
y
tim
e
y
o
u
m
a
k
e
an
HT
T
P
r
eq
u
est
a
b
u
n
c
h
o
f
h
ea
d
e
r
s
;
co
o
k
ie
d
at
a
a
r
e
tr
an
s
f
er
r
e
d
to
t
h
e
s
er
v
er
.
T
h
is
ca
n
ad
d
u
p
to
a
r
ea
s
o
n
a
b
ly
lar
g
e
a
m
o
u
n
t o
f
d
ata
th
at
n
ee
d
s
to
b
e
tr
an
s
f
er
r
ed
,
wh
ich
in
tu
r
n
in
cr
ea
s
es
laten
cy
wh
en
d
ev
elo
p
in
g
a
r
ea
l
tim
e
a
p
p
lica
tio
n
,
r
e
d
u
cin
g
laten
cy
is
cr
u
ci
al
to
k
ee
p
in
g
th
in
g
s
r
u
n
n
i
n
g
s
m
o
o
th
ly
.
T
h
e
wo
r
s
t
p
ar
t o
f
t
h
is
is
th
at
a
lo
t o
f
th
es
e
h
ea
d
er
s
an
d
co
o
k
ies ar
e
n
o
t
ac
tu
ally
n
ee
d
ed
to
f
u
l
f
il th
e
clien
t’
s
r
eq
u
est.
Fo
r
d
ev
el
o
p
in
g
a
f
in
an
cial
s
to
ck
ap
p
licatio
n
th
at
cr
ea
te
a
p
e
r
s
is
ten
t,
lo
w
laten
cy
c
o
n
n
ec
ti
o
n
th
at
ca
n
s
u
p
p
o
r
t
tr
a
n
s
ac
tio
n
s
in
itiated
b
y
eith
er
th
e
clien
t
o
r
s
er
v
e
r
,
W
eb
So
ck
et
will
b
e
ap
p
lied
to
illu
s
tr
ate
ef
f
icien
t
r
ea
ltime
web
.
W
eb
So
ck
et
p
r
o
v
id
e
a
p
er
s
is
ten
t
co
n
n
ec
tio
n
b
etwe
en
a
clien
t
an
d
s
er
v
er
th
at
b
o
th
p
ar
ties
ca
n
u
s
e
to
s
tar
t
s
en
d
in
g
d
ata
at
an
y
tim
e.
T
h
e
clien
t
estab
lis
h
es
a
W
eb
So
ck
et
co
n
n
ec
tio
n
th
r
o
u
g
h
a
p
r
o
ce
s
s
k
n
o
wn
as
th
e
W
eb
So
ck
et
h
an
d
s
h
a
k
e.
T
h
is
p
r
o
ce
s
s
s
tar
ts
with
th
e
clien
t
s
en
d
in
g
a
r
eg
u
lar
HT
T
P r
eq
u
est to
th
e
s
er
v
er
.
W
eb
So
ck
et
Pro
to
co
l,
s
im
ilar
to
So
ck
et
wh
o
s
e
co
m
m
u
n
icatio
n
is
b
ased
o
n
T
C
P/IP
is
a
f
u
ll
d
u
p
le
x
co
m
m
u
n
icatio
n
p
r
o
to
co
l
[
4
]
.
T
h
e
m
ajo
r
a
d
v
an
ta
g
e
o
f
W
eb
So
ck
et
is
th
at
in
f
o
r
m
atio
n
ca
n
b
e
s
en
t
b
etwe
en
clien
t
an
d
s
er
v
er
at
an
y
tim
e.
Ajax
co
m
m
u
n
icatio
n
d
o
es
n
o
t
r
estra
in
W
eb
So
ck
et
b
ec
au
s
e
in
Ajax
tech
n
o
lo
g
y
,
it
is
r
eq
u
ir
ed
th
at
th
e
clien
t
i
n
itiate
th
e
r
eq
u
est.
C
o
n
tem
p
o
r
a
r
y
b
r
o
wser
f
u
lly
s
u
p
p
o
r
ts
W
eb
So
ck
et
p
r
o
to
co
l
s
o
W
eb
So
ck
et
clien
t c
an
p
u
s
h
d
a
ta
to
th
e
s
er
v
er
[
5
].
T
h
e
estab
lis
h
m
en
t
o
f
W
eb
So
c
k
et
co
n
n
ec
tio
n
is
in
th
is
m
a
n
n
er
,
th
e
b
r
o
wser
f
ir
s
t
s
en
d
s
a
W
eb
S
o
ck
et
co
n
n
ec
tio
n
r
eq
u
est,
in
wh
ich
t
h
e
b
r
o
wser
r
esp
o
n
d
s
to
th
e
r
eq
u
est
s
en
t
b
y
th
e
clien
t
,
th
e
p
r
o
c
ess
d
escr
ib
ed
ab
o
v
e
is
k
n
o
wn
as
‘
h
an
d
s
h
ak
e
’
.
T
h
e
d
ata
tr
an
s
m
is
s
io
n
at
th
is
p
h
as
e
is
b
ased
o
n
tex
t
an
d
u
s
e
ASC
I
I
en
co
d
in
g
a
n
d
is
co
m
p
atib
le
with
ex
is
tin
g
HT
T
P
/1
.
1
p
r
o
t
o
co
ls
[
2
]
W
eb
So
ck
et
is
co
n
n
ec
tio
n
o
r
ie
n
ted
wh
ich
im
p
lies
th
at
if
a
b
r
o
ad
ca
s
t
m
ess
ag
e
is
s
en
t
f
r
o
m
t
h
e
s
er
v
er
,
th
ey
ar
e
in
s
tan
tly
d
is
p
er
s
ed
to
all
clien
t.
T
h
is
f
ea
tu
r
e
m
a
k
es
web
s
o
ck
et
co
n
tain
i
n
g
o
n
ly
o
n
e
co
m
p
o
n
en
t
f
o
r
b
o
th
clien
t n
d
s
er
v
er
c
o
m
m
u
n
ic
atio
n
.
[6
]
Evaluation Warning : The document was created with Spire.PDF for Python.
I
n
t J I
n
f
&
C
o
m
m
u
n
T
ec
h
n
o
l
I
SS
N:
2252
-
8
7
7
6
F
in
a
n
cia
l sto
ck
a
p
p
lica
tio
n
u
s
in
g
w
eb
s
o
ck
et
in
r
ea
l time
a
p
p
lica
tio
n
(
Yin
ka
-
B
a
n
jo
C
h
ika
)
141
T
h
e
aim
o
f
th
is
p
ap
er
is
to
cr
ea
te
a
f
in
an
cial
s
to
ck
ap
p
licatio
n
u
s
in
g
W
eb
So
ck
et.
T
h
e
d
etailed
o
b
jectiv
es a
r
e:
-
C
r
ea
tin
g
a
web
-
b
ased
s
y
s
tem
f
in
an
cial
s
to
ck
ap
p
licatio
n
-
I
n
teg
r
atio
n
o
f
W
eb
So
ck
et
f
r
a
m
ewo
r
k
s
y
s
tem
in
f
in
an
cial
s
to
ck
ap
p
licatio
n
s
y
s
t
em
T
h
is
p
r
o
ject
h
as
f
o
cu
s
ed
o
n
r
e
al
-
tim
e
co
m
p
u
tin
g
f
r
o
m
a
s
o
f
twar
e
an
d
web
ap
p
licatio
n
p
er
s
p
ec
tiv
e
in
im
p
lem
en
tin
g
web
s
o
ck
et
p
r
o
t
o
co
l w
ith
a
f
in
a
n
cial
ap
p
licati
o
n
s
y
s
tem
f
o
r
p
r
esen
tin
g
r
ea
l t
im
e
m
ar
k
et
d
ata.
T
h
is
p
r
o
ject
is
lim
ited
d
u
e
to
t
h
e
f
ac
t
th
at
W
eb
So
ck
et
is
n
o
t
f
u
lly
s
u
p
p
o
r
ted
b
y
cu
r
r
en
t
b
r
o
wser
,
an
d
d
if
f
e
r
en
t
b
r
o
wser
s
u
p
p
o
r
t
d
if
f
er
en
t
p
o
r
ti
o
n
o
f
th
e
W
eb
So
ck
et
s
p
ec
if
ic
atio
n
.
Fo
r
th
is
d
r
i
v
e
to
m
a
k
e
r
e
al
tim
e
ap
p
licatio
n
s
ca
p
ab
le
o
f
r
u
n
n
in
g
an
y
w
h
er
e,
th
e
clien
t
s
id
e
s
h
o
u
ld
co
m
p
r
is
e
s
o
m
e
W
eb
So
ck
e
t
s
im
u
latio
n
f
r
am
ewo
r
k
s
u
ch
as
Sig
n
alR
,
wh
ich
p
r
o
v
i
d
es C
#
lib
r
ar
y
T
h
e
m
eth
o
d
o
l
o
g
ies
u
s
ed
f
o
r
im
p
lem
en
tin
g
th
e
f
in
a
n
cial
s
to
ck
ap
p
licatio
n
p
r
o
ject
is
W
eb
So
ck
et.
T
h
e
web
s
o
ck
et
s
er
v
er
will
also
b
e
im
p
lem
en
ted
u
s
in
g
C
#
L
ib
r
a
r
y
.
T
h
e
co
d
e
will
b
e
wr
itten
u
s
in
g
s
tan
d
ar
d
lib
r
a
r
ies
av
ailab
le
in
b
o
th
W
in
d
o
ws
an
d
L
in
u
x
f
o
r
m
ax
im
u
m
p
o
r
tab
i
lity
.
T
h
ir
d
p
ar
t
y
lib
r
a
r
ies
m
u
s
t
o
n
ly
b
e
u
s
ed
i
f
th
e
licen
s
in
g
is
p
er
m
is
s
iv
e.
So
f
tw
ar
e
d
ev
elo
p
m
en
t
will
b
e
co
n
d
u
cted
in
an
iter
ativ
e
way
.
W
o
r
k
will
f
o
llo
w
a
b
asic
p
lan
an
d
allo
w
f
o
r
ch
an
g
es
d
u
r
in
g
th
e
im
p
lem
e
n
tatio
n
if
a
d
d
itio
n
al
f
ea
tu
r
es
ar
e
r
e
q
u
ir
e
d
o
r
if
p
er
f
o
r
m
a
n
ce
is
s
u
es with
th
e
s
elec
ted
d
esig
n
s
u
r
f
ac
e.
2.
RE
S
E
ARCH
M
E
T
H
O
D
Sy
n
ch
r
o
n
o
u
s
co
m
m
u
n
icatio
n
s
y
s
tem
also
k
n
o
w
n
as
r
ea
l
-
tim
e
co
m
m
u
n
icatio
n
s
y
s
tem
alwa
y
s
in
clu
d
es
a
lar
g
e
n
u
m
b
er
o
f
p
ass
iv
e
r
ec
i
p
ien
ts
[
7
].
W
eb
clien
ts
is
ab
le
to
p
o
ll
s
er
v
er
-
s
id
e
e
v
en
ts
b
ec
a
u
s
e
o
f
th
e
L
ig
h
t
co
m
f
o
r
t
p
r
o
v
id
ed
b
y
A
J
AX
to
th
e
HT
T
P
co
m
m
u
n
icatio
n
m
o
d
e
l.
C
o
m
et
p
r
esen
te
d
a
b
etter
ap
p
r
o
ac
h
b
y
d
e
v
iatin
g
f
r
o
m
HT
T
P
m
o
d
el
o
f
C
o
m
m
u
n
icatio
n
an
d
p
e
r
m
itti
n
g
co
m
m
u
n
icatio
n
o
v
er
HT
T
P
with
p
u
s
h
-
s
ty
le.
W
ith
th
e
ad
v
en
t
o
f
HT
ML
5
,
web
s
o
ck
et
b
r
in
g
s
a
b
o
u
t
a
h
i
g
h
er
d
e
v
elo
p
m
e
n
t
th
a
n
Ajax
a
n
d
C
o
m
et.
T
h
e
co
n
d
itio
n
o
f
HT
ML
5
W
e
b
So
ck
et
d
ef
i
n
es
a
s
in
g
le
s
o
ck
e
t
f
u
ll
d
u
p
lex
(
b
i
-
d
ir
ec
tio
n
al)
c
o
n
n
ec
tio
n
wh
ich
is
u
s
ed
to
p
u
ll
an
d
p
u
s
h
d
ata
b
et
wee
n
a
clien
t
(
b
r
o
wser
)
an
d
a
s
er
v
er
,
th
er
e
b
y
d
eliv
er
in
g
a
b
etter
r
esu
l
t
th
an
co
m
et
an
d
Ajax
p
o
llin
g
[
3
].
2
.
1
.
P
rio
r
m
et
ho
ds
f
o
r
re
a
l t
im
e
da
t
a
co
m
m
un
ica
t
io
n
HT
T
P
ca
n
s
im
u
late
r
ea
l
tim
e
c
o
m
m
u
n
icatio
n
en
v
ir
o
n
m
en
t.
T
h
e
HT
T
P
lo
n
g
p
o
llin
g
a
n
d
HT
T
P
p
o
llin
g
ca
n
b
e
co
n
s
id
er
ed
as th
e
g
o
o
d
s
o
lu
tio
n
f
o
r
d
eliv
e
r
in
g
r
ea
l tim
e
in
f
o
r
m
atio
n
[
4
]:
2
.
1
.
1
.
H
TTP
po
llin
g
A
co
m
m
o
n
f
ea
tu
r
e
o
f
HT
T
P
Po
llin
g
is
its
s
eq
u
en
ce
in
r
eq
u
est
r
esp
o
n
s
e
m
ess
ag
es.
A
r
eq
u
est
is
s
en
t
b
y
th
e
clien
t to
th
e
s
er
v
e
r
,
wh
en
th
e
s
er
v
er
r
ec
eiv
e
t
h
e
m
ess
ag
e,
it r
etu
r
n
s
a
n
ew
m
ess
ag
e
if
th
er
e
is
a
m
ess
ag
e
to
s
en
d
o
th
er
wis
e
an
em
p
ty
r
esp
o
n
s
e
is
r
et
u
r
n
ed
if
th
er
e
is
n
o
m
ess
ag
e
av
ailab
le.
Af
ter
a
s
m
all
in
ter
m
is
s
io
n
s
ay
t,
ca
lled
as
p
o
llin
g
in
ter
v
al,
th
e
s
er
v
er
is
p
o
lled
ag
ain
b
y
c
lien
t
to
r
ea
l
ize
if
th
er
e
is
a
v
a
ca
n
t
n
ew
m
ess
ag
e.
E
x
am
p
les o
f
a
p
p
licatio
n
wh
ic
h
u
s
e
HT
T
P Po
llin
g
ar
e
ch
at
r
o
o
m
s
an
d
g
am
es
in
Fig
u
r
e
1
.
Fo
r
HT
T
P
Po
llin
g
to
b
e
ad
eq
u
ate
in
p
r
o
v
id
in
g
r
ea
l
tim
e
d
etails,
th
e
in
ter
v
al
o
f
d
eliv
er
in
g
th
e
m
ess
ag
e
m
u
s
t
b
e
k
n
o
wn
wh
ic
h
im
p
lies
th
at
th
e
r
ate
o
f
tr
a
n
s
m
itti
n
g
th
e
d
ata
m
u
s
t
b
e
s
tab
le.
T
h
u
s
,
th
e
clien
t
will
o
n
ly
b
e
s
y
n
ch
r
o
n
ize
d
b
y
th
e
a
p
p
licatio
n
d
e
v
elo
p
er
to
r
e
q
u
est
f
o
r
d
ata
wh
en
it
is
ce
r
tain
to
b
e
a
v
ailab
le.
Ho
wev
er
,
laten
cy
is
ac
cu
m
u
lated
w
h
en
t
h
e
r
ate
o
f
d
ata
r
eq
u
est
g
r
o
ws
wh
ich
i
s
ca
u
s
ed
d
u
e
to
th
e
co
n
s
tan
t
r
ep
etitio
n
o
f
im
p
o
r
tan
t h
ea
d
er
d
etails
b
y
th
e
o
v
er
h
ea
d
i
n
tr
in
s
ic
to
HT
T
P p
o
llin
g
.
D
u
e
to
th
e
c
o
m
p
lex
it
y
o
f
r
ea
l
-
tim
e
HT
T
P
W
eb
ap
p
licatio
n
s
,
it
h
as
b
ee
n
p
r
o
p
o
s
ed
in
ea
r
ly
r
esear
ch
th
at
HT
T
P
was
n
o
t
co
n
ce
i
v
ed
f
o
r
r
ea
l
tim
e
f
u
ll
d
u
p
lex
co
m
m
u
n
icatio
n
.
T
h
u
s
,
th
e
HT
T
P
s
o
lu
tio
n
ca
n
s
im
u
late
th
e
r
ea
l
tim
e
co
m
m
u
n
icatio
n
with
h
ig
h
tag
in
p
r
ice
,
in
cr
ea
s
ed
n
etwo
r
k
tr
af
f
ic
a
n
d
i
n
cr
ea
s
ed
laten
cy
.
Fig
u
r
e
1
.
C
lien
t
u
s
in
g
HT
T
P
p
o
llin
g
Evaluation Warning : The document was created with Spire.PDF for Python.
I
SS
N
:
2
2
5
2
-
8
7
7
6
I
n
t J I
n
f
&
C
o
m
m
u
n
T
ec
h
n
o
l
,
Vo
l.
8
,
No
.
3,
Dec
2
0
1
9
:
1
3
9
–
151
142
2
.
1
.
2
.
H
T
T
P
lo
ng
po
llin
g
A
f
law
in
p
o
llin
g
is
th
e
lar
g
e
a
m
o
u
n
t
o
f
f
u
tile
r
e
q
u
est
it
s
en
t
to
th
e
s
er
v
er
wh
e
n
it
d
o
es
n
o
t h
av
e
n
ew
m
ess
ag
e
f
o
r
a
clien
t.
T
h
er
ef
o
r
e,
th
e
d
etails wh
ich
ar
e
p
u
s
h
ed
f
o
r
m
s
er
v
er
s
to
clien
t a
r
e
we
ll h
an
d
led
b
y
HT
T
P
L
o
n
g
p
o
llin
g
w
h
ich
is
a
v
ar
iat
io
n
o
f
p
o
lli
n
g
[8
]
.
W
ith
HT
T
P
lo
n
g
p
o
llin
g
as
s
h
o
w
n
as
Fig
u
r
e
2
,
wh
en
th
e
r
e
is
n
o
n
ew
m
ess
ag
e
to
b
e
s
en
t
to
th
e
clien
t,
th
e
s
er
v
er
d
o
es
r
e
p
ly
with
an
em
p
t
y
m
ess
ag
e
b
u
t
in
s
tead
k
ee
p
th
e
r
eq
u
est
u
n
til
a
f
r
esh
m
ess
ag
e
is
av
ailab
le
t
o
b
e
s
en
t
to
th
e
clien
t
o
r
tim
eo
u
t
o
cc
u
r
s
t
h
er
eb
y
d
ec
r
ea
s
in
g
th
e
n
u
m
b
er
o
f
p
o
in
tles
s
r
eq
u
est
t
o
th
e
s
er
v
er
b
u
t
s
till
HT
T
P
L
o
n
g
p
o
llin
g
d
id
n
o
t
s
o
lv
e
t
h
e
p
r
o
b
lem
in
tr
ad
itio
n
al
p
o
llin
g
as th
er
e
is
s
till
in
cr
ea
s
ed
laten
cy
an
d
o
v
er
h
ea
d
.
Fig
u
r
e
2
.
C
lien
t
u
s
in
g
lo
n
g
p
o
l
lin
g
2
.
1
.
3
.
H
TTP
s
t
re
a
m
ing
HT
T
P
Stre
am
in
g
wh
ich
was
f
i
r
s
t
m
ad
e
k
n
o
wn
to
th
e
web
b
y
Netscap
e
in
1
9
9
2
o
r
ig
in
ates
in
two
k
in
d
s
n
am
ely
p
ag
e
s
tr
ea
m
in
g
an
d
s
er
v
ice
s
tr
ea
m
in
g
.
T
h
e
co
n
ten
t
o
f
th
e
s
er
v
er
s
tr
ea
m
in
g
in
a
lo
n
g
-
liv
e
d
HT
T
P
C
o
n
n
ec
tio
n
is
co
n
tain
ed
in
p
a
g
e
s
tr
ea
m
in
g
as we
ll a
s
s
er
v
ice
s
tr
ea
m
in
g
[
9
]
.
W
ith
HT
T
P S
tr
ea
m
in
g
,
th
e
s
er
v
er
d
o
es
n
o
t
clo
s
e
th
e
co
n
n
ec
tio
n
b
u
t
k
ee
p
s
it
o
p
en
th
r
o
u
g
h
o
u
t
a
clien
t
s
ess
io
n
b
y
r
u
n
n
in
g
a
lo
n
g
lo
o
p
.
A
ch
an
g
e
in
s
tate
is
d
etec
ted
b
y
th
e
s
er
v
er
s
cr
ip
t
u
s
in
g
s
o
m
e
m
eth
o
d
s
l
ik
e
ev
en
t
r
eg
is
tr
atio
n
.
O
n
ce
a
ch
an
g
e
is
d
etec
te
d
,
th
e
n
ew
d
ata
is
s
tr
ea
m
ed
a
n
d
f
lu
s
h
ed
wh
ile
th
e
co
n
n
ec
tio
n
r
e
m
ain
s
o
p
en
.
Fo
r
th
e
m
ea
n
tim
e
,
th
e
n
ew
d
ata
m
u
s
t
b
e
d
is
p
lay
ed
in
th
e
u
s
er
in
ter
f
ac
e
wh
ile
awa
itin
g
th
e
s
er
v
er
’
s
r
esp
o
n
s
e
[
9
]
.
A
d
if
f
er
en
ce
b
etwe
en
th
e
f
o
r
m
s
o
f
s
tr
ea
m
in
g
is
th
at
s
er
v
ice
s
tr
ea
m
in
g
is
in
itialized
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s
r
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est
wh
ich
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X
HR
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s
tr
ea
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ile
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ag
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ea
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th
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r
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e
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t
o
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itial
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ic
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ilit
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u
r
atio
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co
n
n
ec
tio
n
[
4
]
.
An
e
x
am
p
le
o
f
HT
T
P
Stre
am
in
g
im
p
lem
en
t
atio
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Fo
r
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er
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r
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tain
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s
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ip
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a
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a
n
ev
er
last
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g
r
esp
o
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e)
w
h
ich
is
s
h
o
wn
in
Fig
u
r
e
3
.
C
o
d
es
ar
e
im
p
lem
en
te
d
in
s
cr
ip
t
tag
s
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en
it
is
b
ee
n
r
ea
d
b
y
a
b
r
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wser
,
th
er
e
f
o
r
e
th
e
d
at
a
r
ec
eiv
ed
b
y
a
clien
t
f
r
o
m
th
e
s
er
v
er
ar
e
en
cl
o
s
ed
as
J
av
aScr
ip
t
f
u
n
ctio
n
s
[
5
].
C
o
m
p
ar
is
o
n
b
etwe
en
HT
T
P
lo
n
g
p
o
llin
g
an
d
HT
T
P
s
tr
ea
m
in
g
p
r
o
to
co
ls
as
s
h
o
w
in
T
ab
le
1
.
Fig
u
r
e
3
.
HT
T
P st
r
ea
m
in
g
Evaluation Warning : The document was created with Spire.PDF for Python.
I
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&
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ec
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SS
N:
2252
-
8
7
7
6
F
in
a
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l time
a
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Yin
ka
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a
n
jo
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143
T
ab
le
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C
o
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TTP
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t
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A
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t
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st
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a
t
i
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n
c
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a
c
h
a
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s
d
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a
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f
l
u
s
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e
d
w
h
i
l
e
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e
c
o
n
n
e
c
t
i
o
n
r
e
m
a
i
n
s
o
p
e
n
2
.
1
.
4
.
C
o
m
et
C
o
m
et
s
ch
em
e
wh
ich
ex
is
t
d
u
e
to
t
h
e
p
er
s
is
ten
ce
attr
ib
u
te
o
f
HT
T
P/1
.
1
u
s
es
th
e
m
eth
o
d
s
p
r
ac
ticed
b
y
lo
n
g
p
o
llin
g
to
ac
co
m
p
lis
h
r
ea
l
tim
e
b
eh
av
io
r
[
1
0
]
.
B
ef
o
r
e
th
e
ad
v
en
t
o
f
p
er
s
is
ten
ce
co
n
n
ec
tio
n
,
d
if
f
er
e
n
t
UR
L
S
ar
e
b
ee
n
f
etch
ed
b
y
d
i
f
f
er
en
t
T
C
P
co
n
n
ec
tio
n
wh
ic
h
ca
u
s
e
co
n
g
esti
o
n
o
n
th
e
in
t
er
n
et
b
ec
au
s
e
o
f
t
h
e
w
eig
h
t
b
ein
g
p
u
t
o
n
th
e
s
er
v
er
b
u
t
with
p
e
r
s
is
ten
ce
co
n
n
e
ctio
n
th
e
co
n
n
ec
tio
n
b
etwe
en
th
e
clien
t
an
d
th
e
b
r
o
wser
ar
e
alwa
y
s
o
p
en
till
it
is
clo
s
ed
b
y
eith
er
o
n
e
o
f
th
e
p
ar
ty
s
en
d
in
g
a
p
r
ec
is
e
clo
s
e
co
n
n
ec
tio
n
m
ess
ag
e
o
r
a
tim
e/n
etwo
r
k
er
r
o
r
ta
k
e
p
lace
.
As
s
o
o
n
as
th
e
co
n
n
ec
tio
n
is
clo
s
ed
,
th
e
s
er
v
e
r
ca
n
n
o
t
s
tar
t
it
b
ac
k
to
g
ai
n
a
co
n
n
ec
tio
n
to
th
e
b
r
o
wser
[
5
].
W
ith
p
er
s
is
ten
ce
co
n
n
ec
tio
n
,
C
PU
tim
e
i
s
s
av
ed
in
b
o
th
h
o
s
ts
an
d
r
o
u
ter
s
,
f
ewe
r
T
C
P
co
n
n
ec
tio
n
s
ar
e
o
p
en
ed
an
d
cl
o
s
ed
an
d
t
h
e
m
e
m
o
r
y
u
s
e
in
th
e
co
n
tr
o
l b
l
o
ck
s
o
f
th
e
T
C
P Pr
o
to
co
l c
a
n
b
e
s
a
v
ed
in
h
o
s
ts
.
2
.
1
.
5
.
Serv
er
-
s
ent
ev
ent
s
Ser
v
er
s
en
t E
v
en
t
u
s
es th
e
tex
t
/ev
en
t stre
am
f
ea
t
u
r
e
o
f
HT
T
P/1
.
1
c
o
n
ten
t t
y
p
e
t
o
s
en
d
m
ess
ag
e
to
th
e
b
r
o
wser
(
clien
t)
.
T
h
e
ch
an
n
el
in
wh
ich
s
er
v
er
-
s
en
t
ev
en
t u
s
e
to
co
m
m
u
n
icate
to
th
e
clien
t f
r
o
m
th
e
s
er
v
er
is
a
one
-
way
co
m
m
u
n
icatio
n
ch
an
n
el.
Ho
wev
er
,
th
e
clien
t
h
as
to
s
u
b
s
cr
ib
e
to
th
e
ch
an
n
el
b
y
f
ir
s
t
co
n
n
ec
tin
g
,
th
e
n
wh
en
th
er
e
is
a
f
r
esh
in
f
o
r
m
a
tio
n
av
ailab
le
th
e
s
er
v
er
p
o
s
t
ev
en
ts
.
T
h
e
co
n
n
ec
tio
n
is
alwa
y
s
o
p
en
u
n
til
it
is
clo
s
ed
b
y
a
p
r
o
x
y
o
r
th
e
clien
t
its
elf
.
T
h
e
co
n
n
ec
tio
n
ca
n
also
b
e
co
n
f
ig
u
r
ed
to
clo
s
e
af
ter
a
d
u
r
atio
n
o
f
tim
e,
s
am
e
as
th
e
clien
t
r
ec
o
n
n
ec
tio
n
tim
e
[
3
]
.
As
s
h
o
wn
in
Fig
u
r
e
4
,
Ser
v
er
s
en
t
E
v
en
ts
b
e
h
av
es
q
u
ite
lik
e
lo
n
g
-
p
o
llin
g
.
Ser
v
er
-
s
en
t
ev
e
n
ts
ca
n
b
e
u
s
ed
b
y
d
ev
el
o
p
er
s
to
ac
ce
s
s
API
s
.
E
v
en
t
So
u
r
ce
in
ter
f
ac
e
r
ec
eiv
e
ac
ce
s
s
f
r
o
m
t
h
e
API
t
h
er
eb
y
p
r
o
v
id
in
g
a
d
ir
ec
t
J
av
aScr
ip
t
co
d
e,
allo
win
g
e
v
en
ts
to
b
e
tr
i
g
g
er
ed
b
y
th
e
s
er
v
e
r
to
th
e
b
r
o
wser
an
d
u
p
d
at
in
g
t
h
e
co
n
ten
t
o
n
th
e
clien
t
[
1
0
]
.
W
h
en
an
I
D
is
s
et
o
n
m
ess
a
g
es
s
en
t,
th
e
clien
t
r
ec
o
n
n
ec
ts
a
n
d
co
n
tin
u
e
wh
er
e
it st
o
p
s
af
ter
a
lo
o
k
u
p
is
b
ee
n
d
o
n
e
b
y
th
e
s
er
v
er
o
n
its
I
D.
T
h
is
f
ea
tu
r
e
m
a
k
es
s
er
v
er
s
en
t e
v
en
t r
o
b
u
s
t.
Fig
u
r
e
4
.
C
lien
t
u
s
in
g
s
er
v
e
r
s
en
t e
v
en
ts
T
h
e
m
o
d
el
in
wh
ic
h
clien
t
-
s
i
d
e
ev
en
ts
ar
e
tr
an
s
m
itted
to
th
e
s
er
v
er
(
i.e
.
a
u
s
er
click
s
o
n
a
lin
k
to
r
eq
u
est
a
n
ew
p
ag
e
f
r
o
m
t
h
e
s
e
r
v
er
)
ca
n
b
e
r
ef
er
r
ed
to
as
“c
lien
t
-
s
en
t
ev
en
ts
”.
Ser
v
er
-
s
en
t
ev
en
ts
p
er
m
its
s
er
v
er
s
to
p
ass
in
f
o
r
m
atio
n
to
th
e
clie
n
t
as
it
b
ec
o
m
es
ac
ce
s
s
ib
le,
wi
th
o
u
t
clien
t
p
o
llin
g
.
T
o
u
s
e
Ser
v
er
Sen
t
E
v
e
n
ts
,
an
ap
p
licatio
n
im
p
lem
en
ts
an
E
v
en
t So
u
r
ce
API
in
th
e
b
r
o
wser
an
d
p
u
s
h
es d
ata
f
r
o
m
th
e
s
er
v
er
with
Ser
v
er
Sen
t
E
v
en
t’
s
ev
en
t stre
am
d
ata
f
o
r
m
at.
2
.
2
.
Dra
wba
ck
s
o
f
re
a
l
t
im
e
web
wit
h H
T
T
P
-
O
v
er
hea
d
Ach
iev
in
g
r
ea
l
tim
e
with
HT
T
P
is
a
n
aïv
e
ap
p
r
o
ac
h
b
ec
au
s
e
HT
T
P
h
ea
d
er
s
co
n
s
u
m
e
e
x
ce
s
s
d
ata
wh
ich
is
in
m
o
s
t
ca
s
e
n
o
t
u
s
ef
u
l
f
o
r
r
ea
l
tim
e
a
p
p
licatio
n
wh
ile
W
eb
So
ck
et
p
r
o
to
co
l
is
in
te
n
d
ed
f
o
r
it b
ec
au
s
e
it
m
ak
es
av
ailab
l
e
a
b
id
ir
ec
tio
n
al,
f
u
ll
-
d
u
p
lex
co
m
m
u
n
icatio
n
ch
an
n
el
f
o
r
u
s
e
wh
ich
is
ca
r
r
y
o
u
t
with
a
s
in
g
le
s
o
ck
et
lead
in
g
to
a
s
ca
lab
le
r
e
al
tim
e
W
eb
ap
p
licatio
n
.
Evaluation Warning : The document was created with Spire.PDF for Python.
I
SS
N
:
2
2
5
2
-
8
7
7
6
I
n
t J I
n
f
&
C
o
m
m
u
n
T
ec
h
n
o
l
,
Vo
l.
8
,
No
.
3,
Dec
2
0
1
9
:
1
3
9
–
151
144
-
Unid
irec
t
io
na
l
HT
T
P
is
u
n
id
ir
ec
tio
n
al
s
o
wh
en
u
s
in
g
r
ea
l
tim
e
a
p
p
licatio
n
with
HT
T
P,
s
ev
er
al
T
C
P
co
n
n
ec
tio
n
is
u
s
ed
to
ac
h
iev
e
a
r
ep
licated
bi
-
d
ir
ec
tio
n
al
co
m
m
u
n
icatio
n
[
1
1
]
,
e
v
en
with
s
er
v
e
r
s
en
t
ev
en
t
,
a
c
o
n
n
ec
tio
n
will
s
till
b
e
n
ee
d
ed
to
p
u
s
h
ev
e
n
ts
f
r
o
m
th
e
s
er
v
er
to
t
h
e
clien
t
an
d
also
to
s
en
d
m
ess
ag
e
to
th
e
s
er
v
er
b
u
t
W
eb
So
ck
et
p
r
o
to
co
l
wh
ich
b
r
i
n
g
im
p
r
o
v
em
en
t
t
o
r
ea
l
tim
e
a
p
p
licat
io
n
s
is
p
u
r
p
o
s
ely
f
o
r
th
e
ai
m
o
f
b
i
-
d
ir
ec
tio
n
al
co
m
m
u
n
icatio
n
wh
ich
r
ea
l
tim
e
ap
p
licatio
n
is
all
ab
o
u
t.
2
.
3
.
W
eb
s
o
ck
et
C
o
m
m
u
n
icatio
n
o
v
er
h
ea
d
ca
n
b
e
in
ten
s
if
ied
b
y
th
e
u
s
e
o
f
c
o
n
tin
u
o
u
s
p
o
llin
g
in
an
ap
p
licatio
n
.
T
h
e
W
eb
So
ck
et
p
r
o
t
o
co
l
allo
ws
f
o
r
a
r
o
b
u
s
t
r
ea
l
tim
e
web
a
p
p
licatio
n
b
ec
au
s
e
it
p
r
o
v
id
e
s
a
f
u
ll
-
d
u
p
lex
b
i
-
d
ir
ec
tio
n
al
co
m
m
u
n
icatio
n
ch
an
n
el
wh
ich
is
d
o
n
e
with
a
s
in
g
le
s
o
ck
et
[
7
].
2
.
3
.
1
.
Web
s
o
ck
et
a
rc
hite
ct
ure
Fig
u
r
e
5
d
ep
icts
th
e
ar
ch
itectu
r
e
o
f
W
eb
So
ck
et.
W
eb
So
c
k
e
t
p
r
o
to
c
o
l
co
n
s
is
t
o
f
two
ca
te
g
o
r
ies;
th
e
f
ir
s
t
p
ar
t
is
th
e
Han
d
s
h
ak
e
w
h
ich
co
n
tain
s
th
e
h
an
d
s
h
a
k
e
r
esp
o
n
s
e
f
r
o
m
th
e
s
er
v
er
a
n
d
th
e
m
ess
ag
e
f
r
o
m
th
e
clien
t,
th
e
s
ec
o
n
d
o
f
t
h
e
ca
teg
o
r
y
is
d
ata
tr
an
s
f
er
.
T
h
e
W
eb
s
o
ck
et
also
p
r
o
v
id
e
a
s
o
ck
et
th
at
is
in
n
ate
to
th
e
b
r
o
wser
wh
ich
elim
in
ate
m
o
s
t
o
f
th
e
p
r
o
b
lem
s
with
u
s
in
g
HT
T
P
th
er
e
b
y
b
u
ild
in
g
a
s
ca
lab
le
r
ea
l tim
e
ap
p
licatio
n
.
Fo
r
a
W
eb
So
ck
et
co
n
n
ec
tio
n
to
b
e
estab
lis
h
ed
,
b
o
th
t
h
e
s
er
v
er
an
d
clien
t
h
as
to
b
e
u
p
g
r
a
d
ed
f
r
o
m
HT
T
P
p
r
o
to
co
l
to
web
s
o
ck
et
p
r
o
to
co
l
at
th
e
ea
r
ly
s
tag
e
o
f
h
a
n
d
s
h
ak
e.
W
h
en
th
e
c
o
n
n
ec
tio
n
h
as
b
ee
n
estab
lis
h
ed
,
W
eb
So
ck
et
d
ata,
t
ex
t
an
d
b
in
ar
y
f
r
am
e
ca
n
b
e
s
en
t
at
th
e
s
am
e
tim
e
in
a
n
y
d
ir
e
ctio
n
in
f
u
ll
d
u
p
le
x
m
o
d
e.
R
ep
licatin
g
th
e
W
eb
So
ck
et
b
i
-
d
ir
ec
tio
n
al
c
o
m
m
u
n
icatio
n
with
HT
T
P
co
m
es
with
h
ig
h
p
r
ice
to
p
ay
in
s
lo
w
C
PU
p
er
f
o
r
m
an
ce
,
in
cr
e
ased
laten
cy
an
d
n
etwo
r
k
tr
af
f
ic
an
d
ca
n
b
e
v
e
r
y
d
if
f
icu
lt
an
d
is
er
r
o
r
p
r
o
n
e
b
ec
au
s
e
o
f
th
e
co
m
p
lex
ity
ass
o
ciate
d
with
r
ea
l
tim
e
ap
p
licat
io
n
[
1
2
]
.
An
o
th
er
b
en
e
f
it
o
f
W
eb
So
ck
et
is
th
at
it
h
as
th
e
ab
ilit
y
to
t
r
a
n
s
v
er
s
e
p
r
o
x
y
an
d
f
ir
ewa
ll
wh
ic
h
is
an
ar
ea
d
if
f
icu
lt
f
o
r
m
an
y
ap
p
licatio
n
s
.
W
eb
So
ck
et
p
ass
b
y
p
r
o
x
y
b
y
s
p
o
n
tan
eo
u
s
l
y
s
ettin
g
u
p
a
t
u
n
n
el
wh
e
n
it d
etec
ts
th
e
p
r
esen
ce
o
f
a
p
r
o
x
y
s
er
v
er
.
Fig
u
r
e
5
.
W
eb
s
o
ck
et
a
r
ch
itectu
r
e
3.
RE
SU
L
T
S
A
ND
D
I
SCU
SS
I
O
N
3
.
1
.
F
ea
t
ures o
f
t
he
s
y
s
t
em
T
h
e
u
s
er
in
ter
f
ac
e
o
f
th
e
a
p
p
li
ca
tio
n
in
clu
d
es
th
e
f
in
an
cial
a
p
p
licatio
n
d
ash
b
o
ar
d
,
th
is
p
ag
e
co
n
tain
s
an
ea
s
y
ac
ce
s
s
lin
k
to
s
o
m
e
f
u
n
ctio
n
al
p
a
g
e
s
u
ch
as
th
e
co
m
p
a
n
y
h
o
ld
in
g
m
o
d
u
le,
t
h
e
f
in
a
n
cial
s
to
ck
ap
p
licatio
n
lis
t
m
o
d
u
le
a
m
o
n
g
o
th
er
s
.
T
h
e
lis
t
o
f
f
u
n
ctio
n
ali
ties
an
d
f
ea
tu
r
es
th
at
a
r
e
u
s
ed
in
th
is
a
p
p
licatio
n
ar
e
d
is
cu
s
s
ed
b
elo
w.
3
.
1
.
1
.
F
ina
ncia
l
s
t
o
ck
a
pp
lica
t
io
n da
s
hb
o
a
rd
T
h
is
f
in
an
cial
s
to
ck
ap
p
licatio
n
d
ash
b
o
ar
d
co
n
tain
s
th
e
s
h
o
r
t
cu
t
m
en
u
f
o
r
m
o
s
t
o
f
th
e
m
o
d
u
le
in
th
e
ap
p
licatio
n
.
T
h
e
m
o
d
u
les th
at
ex
is
ts
in
th
is
d
ash
b
o
ar
d
ar
e
lis
ted
an
d
e
x
p
lain
ed
b
elo
w:
-
T
h
er
e
is
th
e
d
ash
b
o
ar
d
ic
o
n
w
h
ich
co
n
tain
s
h
y
p
er
lin
k
f
o
r
th
e
d
ash
b
o
ar
d
an
d
th
u
s
r
ed
i
r
ec
ts
b
ac
k
.
-
T
h
e
d
ash
b
o
ar
d
also
co
n
tain
s
an
ico
n
wh
ich
r
ed
ir
ec
t
to
th
e
m
o
d
if
y
Sto
ck
a
p
p
lic
atio
n
m
o
d
u
le
wh
en
click
ed
o
n
.
Evaluation Warning : The document was created with Spire.PDF for Python.
I
n
t J I
n
f
&
C
o
m
m
u
n
T
ec
h
n
o
l
I
SS
N:
2252
-
8
7
7
6
F
in
a
n
cia
l sto
ck
a
p
p
lica
tio
n
u
s
in
g
w
eb
s
o
ck
et
in
r
ea
l time
a
p
p
lica
tio
n
(
Yin
ka
-
B
a
n
jo
C
h
ika
)
145
-
T
h
er
e
is
also
an
ico
n
f
o
r
My
h
o
ld
in
g
p
ag
e
wh
ich
lis
t th
e
co
m
p
an
y
s
to
ck
.
-
T
h
e
in
d
ex
p
ag
e
w
h
ich
co
n
tain
s
all
th
e
co
m
p
an
y
an
d
t
h
eir
s
to
ck
ico
n
is
also
in
clu
d
e
d
in
th
e
d
ash
b
o
ar
d
.
-
T
h
e
d
ash
b
o
ar
d
h
as th
e
s
id
e
b
a
r
wh
ich
co
n
tain
th
e
f
o
llo
win
g
ac
tio
n
lin
k
s
:
-
Dash
b
o
ar
d
lin
k
-
My
h
o
ld
in
g
s
-
Sto
ck
Ap
p
licatio
n
L
is
t
-
Mo
d
if
y
s
to
ck
-
T
h
er
e
is
th
e
Sear
ch
in
p
u
t f
ield
lo
ca
ted
in
th
e
to
p
p
ar
t o
f
t
h
e
s
id
e
b
ar
wh
ich
allo
ws s
ea
r
ch
es.
W
h
en
a
wo
r
d
is
in
p
u
tted
in
th
e
in
p
u
t
f
ield
f
o
r
th
e
p
u
r
p
o
s
e
o
f
s
ea
r
ch
in
g
,
th
e
r
esu
lt
s
h
o
u
ld
b
e
ab
le
to
b
e
f
ilter
ed
ac
co
r
d
i
n
g
to
d
escr
ip
tio
n
o
f
th
e
u
s
er
s
ea
r
ch
.
3
.
1
.
2
.
M
o
dify
s
t
o
ck
m
o
du
le
I
n
th
is
m
o
d
u
le,
t
h
e
p
r
e
v
io
u
s
s
t
o
ck
o
f
a
c
o
m
p
an
y
ca
n
b
e
u
p
d
ated
,
th
e
p
ag
e
c
o
n
tain
s
th
e
co
m
p
an
y
n
a
m
e,
th
e
cu
r
r
e
n
t
s
to
ck
p
r
ice,
th
e
c
o
m
p
an
y
i
n
itial
o
p
en
in
g
p
r
ice
,
th
e
s
y
m
b
o
l
wh
ich
is
u
s
ed
in
id
e
n
tify
in
g
th
e
c
o
m
p
a
n
y
,
th
e
last
p
r
ev
io
u
s
p
r
ice
o
f
th
e
c
o
m
p
an
y
,
th
e
n
et
ch
an
g
e
an
d
th
e
p
er
ce
n
tag
e
c
h
an
g
e
.
T
h
e
co
m
p
an
y
d
etails
an
d
n
ec
e
s
s
ar
y
in
f
o
r
m
atio
n
ar
e
f
etch
in
g
wh
en
th
e
u
s
er
lo
g
in
with
th
e
c
r
ed
en
tials
in
to
a
f
o
r
m
in
p
u
t
f
ield
th
at
h
as
m
atch
in
g
f
ield
s
with
th
e
d
atab
ase.
T
o
u
p
d
ate
th
e
co
m
p
an
y
’
s
n
ew
s
to
ck
,
th
e
u
s
er
en
ter
s
th
e
n
ew
p
r
ice
in
th
e
s
to
ck
f
ield
s
ec
tio
n
,
th
e
n
et
ch
an
g
e
an
d
p
er
ce
n
tag
e
ch
a
n
g
e
ar
e
u
p
d
ated
im
m
ed
iately
.
T
h
e
m
o
d
u
le
s
h
o
ws
th
e
s
to
ck
an
d
co
m
p
an
y
d
ep
en
d
en
cy
an
d
u
s
er
s
s
h
o
u
ld
b
e
ab
le
t
o
m
an
ag
e
th
eir
s
to
ck
ef
f
ec
tiv
ely
.
Af
ter
t
h
e
u
s
er
s
en
ter
th
e
p
r
ice,
th
e
n
e
w
p
r
ice
is
im
m
ed
iately
ca
p
tu
r
ed
b
y
th
e
Pre
v
C
lo
s
e
(
Pre
v
io
u
s
clo
s
e)
f
ield
a
n
d
ca
lc
u
latio
n
s
ar
e
m
ad
e
with
b
o
th
v
alu
es.
E
ac
h
f
ield
(
Net
ch
an
g
e
an
d
%
ch
an
g
e)
ar
e
g
o
tten
f
r
o
m
th
e
ca
lcu
latio
n
s
o
f
th
e
n
ew
s
to
ck
v
alu
e
an
d
th
e
Pre
v
C
lo
s
e
v
alu
e.
T
h
e
Net
ch
a
n
g
e
an
d
%
ch
an
g
e
s
h
o
ws
a
m
o
n
ito
r
as
to
th
e
p
o
s
itiv
e
o
r
n
e
g
ativ
e
ch
an
g
e
o
f
th
e
co
m
p
an
y
s
to
ck
,
c
o
lo
r
r
ed
w
h
ich
in
d
icate
lo
w
s
to
ck
an
d
g
r
ee
n
d
en
o
tes
p
o
s
itiv
e.
W
h
en
th
e
u
s
er
s
av
es
th
e
n
ew
v
alu
es,
th
e
f
in
a
n
cial
s
to
ck
in
d
ex
p
ag
e
is
u
p
d
ated
im
m
e
d
iately
.
3
.
2
.
T
ec
hn
o
lo
g
y
o
v
er
v
iew
Mic
r
o
s
o
f
t’
s
.
NE
T
f
r
am
ewo
r
k
(
Mic
r
o
s
o
f
t,
2
0
1
7
)
was
u
s
ed
t
o
i
m
p
lem
en
t
th
e
f
in
a
n
cial
s
to
ck
s
y
s
tem
an
d
th
e
ch
o
ice
o
f
lan
g
u
ag
e
was
C
#
.
T
h
e
p
latf
o
r
m
.
NE
T
f
r
am
ew
o
r
k
m
ain
tar
g
et
is
Mic
r
o
s
o
f
t
win
d
o
ws
b
u
t
o
th
e
r
p
latf
o
r
m
also
in
clu
d
es
L
in
u
x
,
Mo
n
o
wh
ich
is
f
r
e
e
an
d
an
o
p
en
s
o
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lem
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tatio
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.
NE
T
f
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r
k
(
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,
2
0
1
3
)
,
with
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n
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d
if
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er
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p
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r
th
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b
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im
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2
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)
an
d
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o
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icatio
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ch
as C
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it su
p
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W
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p
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to
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is
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teg
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ies;
th
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ir
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t
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ar
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Han
d
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wh
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o
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th
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ca
te
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o
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is
d
ata
tr
a
n
s
f
er
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h
e
W
eb
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et
also
p
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et
th
at
is
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n
ate
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ich
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with
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g
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lab
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ap
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licatio
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.
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na
lR
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r
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eb
/ASP
.
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tech
n
o
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u
s
ed
in
ca
r
r
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in
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o
u
t Web
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o
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e
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atio
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s
.
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N
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wh
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k
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o
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a
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tai
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er
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b
ein
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im
p
l
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o
n
a
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er
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w
h
ich
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tial
wh
e
n
u
s
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g
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n
alR
.
T
h
e
c
o
m
m
u
n
ic
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p
atter
n
u
s
ed
in
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eb
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ck
et
h
as
alr
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y
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ch
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p
ter
two
;
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h
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f
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c
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a
b
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wn
as
‘
h
an
d
s
h
ak
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T
h
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d
ata
tr
a
n
s
m
is
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at
th
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p
h
ase
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ased
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ASC
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RE
SU
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3
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1
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o
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a
pp
lica
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rd
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h
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p
licatio
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ief
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h
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wh
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Evaluation Warning : The document was created with Spire.PDF for Python.
I
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in
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wh
ich
is
a
lin
k
to
th
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v
iew
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etail
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u
r
e
6
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Dash
b
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3
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2
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o
g
in pa
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e
Fig
u
r
e
7
s
h
o
ws th
e
lo
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in
p
a
g
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wh
er
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th
e
u
s
er
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r
ed
en
tials
ar
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en
ter
ed
to
ac
ce
s
s
th
e
ap
p
licatio
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.
Fig
u
r
e
7
.
L
o
g
in
p
ag
e
3
.
3
.
3
.
Reg
is
t
er
co
m
pa
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a
pp
lica
t
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n m
o
du
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T
h
is
m
o
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as sh
o
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F
ig
u
r
e
8
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r
eg
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tr
atio
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o
f
u
s
er
s
,
t
h
er
e
a
r
e
t
h
r
ee
r
o
les co
n
tain
ed
i
n
th
is
p
r
o
ject,
wh
ich
ar
e
lis
ted
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d
ex
p
lai
n
ed
b
el
o
w:
Fig
u
r
e
8
.
R
eg
is
ter
co
m
p
an
y
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I
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f
&
C
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m
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N:
2252
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8
7
7
6
F
in
a
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cia
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a
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p
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s
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147
3
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M
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As f
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u
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lects
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ef
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u
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.
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d
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h
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p
p
licatio
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3
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5
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Sto
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ate
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Evaluation Warning : The document was created with Spire.PDF for Python.
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SS
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2
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2
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8
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7
6
I
n
t J I
n
f
&
C
o
m
m
u
n
T
ec
h
n
o
l
,
Vo
l.
8
,
No
.
3,
Dec
2
0
1
9
:
1
3
9
–
151
148
b)
Sy
m
b
o
l
T
h
is
in
p
u
t
f
ield
c
o
n
tain
s
th
e
s
y
m
b
o
l
th
e
u
s
er
c
h
o
o
s
es
as
th
e
ap
p
licatio
n
f
o
r
its
co
m
p
an
y
,
o
n
r
e
g
is
tr
atio
n
o
f
th
e
co
m
p
an
y
,
th
e
in
p
u
t
f
ield
is
also
m
ad
e
b
lan
k
f
o
r
th
e
u
s
e
r
to
p
u
t
in
its
ap
p
licatio
n
c
h
o
ic
e
b
u
t
o
n
l
o
g
in
,
th
e
in
p
u
t
f
ield
is
n
o
t
ed
itab
le
b
u
t d
is
p
lay
ed
o
n
th
e
u
s
er
p
ag
e,
th
e
p
r
o
p
er
ty
o
f
th
e
s
y
m
b
o
l o
n
th
e
d
atab
ase
is
also
o
f
ty
p
e
v
ar
c
h
ar
to
allo
w
f
o
r
a
lar
g
er
f
ield
.
c)
Sto
ck
p
r
ice
T
h
is
f
ield
co
n
tain
s
th
e
s
to
ck
p
r
ice
o
f
th
e
co
m
p
an
y
,
th
e
f
ield
p
r
o
p
er
ty
o
n
th
e
d
ata
b
ase
is
o
f
ty
p
e
v
ar
ch
ar
.
On
r
eg
is
ter
in
g
th
e
co
m
p
an
y
is
allo
wed
to
in
p
u
t
th
e
p
r
ice
o
f
th
e
s
to
ck
,
th
e
f
ield
is
also
m
ad
e
ed
itab
le
o
n
u
p
d
atin
g
o
f
th
e
s
to
ck
p
r
ice.
d)
Pre
v
io
u
s
c
lo
s
e
T
h
e
p
r
ev
io
u
s
clo
s
e
f
ield
is
an
in
p
u
t
f
iel
d
th
at
co
n
tain
s
th
e
p
r
ev
io
u
s
p
r
ice
th
e
s
to
ck
o
f
a
co
m
p
an
y
was
s
o
ld
,
o
n
r
eg
is
ter
in
g
th
e
f
ield
i
s
m
ad
e
in
-
ed
itab
le
as
th
e
s
to
ck
p
r
ice
will
b
e
u
s
ed
as
th
e
p
r
e
v
io
u
s
clo
s
e
p
r
ice
o
f
th
e
co
m
p
a
n
y
,
o
n
u
p
d
atin
g
o
f
s
to
ck
,
th
e
p
r
ev
io
u
s
clo
s
e
f
ield
i
s
also
m
ad
e
in
-
ed
itab
le,
t
h
e
p
r
o
p
er
ty
u
s
ed
o
n
t
h
e
d
atab
ase
f
o
r
th
is
f
ield
is
v
a
r
ch
ar
.
e)
Net
c
h
an
g
e
T
h
e
NetCh
an
g
e
f
ield
o
n
th
e
d
atab
ase
is
o
f
p
r
o
p
er
ty
v
ar
c
h
ar
,
th
is
is
th
e
ca
lcu
lat
io
n
o
f
th
e
co
m
p
an
y
cu
r
r
en
t
s
to
ck
p
r
ice
an
d
th
e
p
r
ev
io
u
s
clo
s
e,
o
n
r
eg
is
ter
in
g
,
t
h
is
f
ield
is
m
ad
e
in
-
ed
itab
le
a
s
th
e
ca
lcu
lat
io
n
i
s
m
ad
e
b
y
s
y
s
tem
b
ased
o
n
t
h
e
in
p
u
t
f
ield
o
f
th
e
cu
r
r
e
n
t
s
to
ck
p
r
ice
an
d
th
e
p
r
ev
io
u
s
clo
s
e,
s
am
e
m
eth
o
d
is
ap
p
lied
o
n
th
e
u
p
d
ate
s
to
ck
m
o
d
u
le.
f)
Per
ce
n
tag
e
c
h
an
g
e
T
h
is
is
th
e
ca
lcu
latio
n
in
p
er
ce
n
tag
e
o
f
t
h
e
ch
an
g
e
in
th
e
p
r
e
v
io
u
s
p
r
ice
a
n
d
cu
r
r
en
t sto
ck
p
r
ice.
T
h
is
is
s
to
r
ed
in
v
a
r
ch
ar
i
n
t
h
e
d
atab
ase
an
d
also
m
a
d
e
i
n
-
ed
itab
le
an
d
ca
lcu
lated
b
y
th
e
s
y
s
tem
b
o
th
o
n
r
eg
is
ter
in
g
o
f
a
n
ew
co
m
p
an
y
an
d
o
n
u
p
d
atin
g
o
f
th
e
s
to
ck
.
3
.
4
.
Netwo
r
k
test
Fig
u
r
e
1
2
s
h
o
ws th
e
n
etwo
r
k
test
d
is
p
lay
ed
in
th
e
clien
t sid
e,
it sh
o
ws th
at
W
eb
So
ck
et
p
r
o
t
o
co
l w
as
u
s
ed
at
th
e
tr
an
s
p
o
r
t la
y
er
o
f
t
h
e
Sto
ck
ap
p
licatio
n
ap
p
licati
o
n
.
Fig
u
r
e
1
2
.
Netwo
r
k
test
3
.
5
.
Co
m
pa
ra
t
iv
e
re
s
ult
a
na
ly
s
is
o
f
webso
ck
et
wit
h o
t
her
re
a
l
t
im
e
m
et
ho
ds
3
.
5
.
1
.
L
ess
o
v
er
hea
d
An
is
s
u
e
ass
o
ciate
d
with
HT
T
P
m
eth
o
d
s
is
th
e
h
u
g
e
v
o
lu
m
e
o
f
h
ea
d
er
d
ata
ac
c
u
m
u
lated
wh
en
s
en
d
in
g
m
esag
es
b
u
t
d
u
e
to
th
e
f
ac
t
th
a
t
W
eb
s
o
ck
et
is
s
tatef
u
l,
m
ess
ag
s
ca
n
b
e
s
en
t
in
s
m
all
s
izes.
I
n
th
e
f
i
n
an
cial
s
to
ck
,
Up
d
atin
g
th
e
ap
p
licatio
n
p
r
ice
is
d
en
o
ted
w
ith
a
5
8
b
y
tes
J
S
ON
o
b
ject
wh
ich
h
as
s
ev
en
at
tr
ib
u
tr
es
(
co
m
p
a
n
y
n
am
e,
s
to
ck
tick
er
,
s
to
c
k
p
r
i
ce
,
o
p
en
in
g
p
r
ice,
p
r
ev
clo
s
e,
n
et
ch
an
g
e,
%
ch
an
g
e
)
,
T
h
e
b
elo
w
s
h
o
ws
th
e
d
if
f
er
en
ce
with
o
th
er
m
eth
o
s
a
r
e
co
m
p
a
r
ed
with
W
eb
So
ck
et
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