►
From YouTube: Building async public APIs using HTTP/2+ and the Mercure protocol by Kévin Dunglas | #asyncapiconf
Description
This talk was part of AsyncAPI Online Conference:
- AsyncAPI Initiative website - https://www.asyncapi.com/
- You can also watch this talk as part of full conference recording with audience questions in the LiveChat - https://youtu.be/oMSzGc5bDr4?t=4431
TALK ABSTRACT
Mercure.rocks is a new protocol allowing to push data updates to web browsers and other HTTP clients in a convenient, fast, reliable and battery-efficient way. It is especially useful to publish real-time updates of resources served through web APIs, to reactive web and mobile apps.
From the ground up, Mercure has been designed to work with technologies not able to maintain persistent connections. It's especially relevant in serverless environments, but is also convenient when using PHP or FastCGI scripts.
Mercure is basically a higher-level replacement for WebSockets. But unlike WebSockets, it leverages the new capabilities of HTTP/2 and HTTP/3.
It has been designed with hypermedia APIs in mind, is auto-discoverable through the Web Linking RFC and is also compatible with GraphQL.
It natively supports authorization, reconnection in case of network issue (with refetching of missed events), subscribing to several topics, topics patterns (using templated URIs)...
Because it is built on top of Server-sent Events and plain old HTTP requests, it is already compatible with all modern browsers, and requires 0 client-side dependencies.
The protocol is open (available as an Internet Draft), and a reference open source implementation of the server written in Go is available. Integrations with popular web frameworks are already available!
During this talk, you'll learn everything you need to get started with the Mercure protocol!
SLIDES:
https://speakerdeck.com/dunglas/2-plus-and-mercure
A
A
Our
body
to
day
as
we
speak
about
mercury
protocol,
mercury
dawn
when
you
protocol
to
build
racing
ait
said
that
will
be
controlled
by
wide
web
brothers
and
mobile
apps
kevin
dans
glace
m
sorry
for
my
tho
ribérac
cet
battle
conforme,
france
and
the
founders
company,
les
tilleuls
point
coop
and
fighter
of
10
protocol.
Mercury
boots
owls
of
few
other
things,
including
de
vulcan
protocol,
il
sogno
protocol
at
times,
triplet
shakes.
Currently
we
leave
two
ears
platform
frameworks:
x1
open-source
dead
leaves
or
bide
webhelp
live.
A
A
A
10
professional
services
and
a
druid
to
the
consultants:
it's
so
if
you
want
to
build
nice
web
and
maize
eyes
helsinki
eyes,
if
you
want
some
help
to
build
project
using
symphony,
iri
and
then
platform,
your
eye
sogo
cuban
and
isabelle
chicas.
Only
to
your
sheets
sleep.
We
can
do
that
and
will
do
that
west.
A
So
if
you
are
here,
we
think
that
you
already
know
what
I
think
I'll
be
our
time:
eyed
peas,
where
times
esteem,
caip
eyes,
are
used
for
server
all
server
communication.
Winston.
The
way
you
lie
fart
kafka
to
the
web.
I
thank
you
to
send
me
just
done
to
the
different
services
and
zinio
frmh
insists,
but
it
can
be
very
useful
to
say
think
I'll
take
that
will
be
cool
tube.
I'm
black
and
white
brothers,
all
au,
il
se
dit
ferrone
topic,
dit
claude
de
messages,
messaging
will
be
center's.
A
Internet
constraint
will
say
that
in
a
few
minutes
of
art
and
stones,
tout
cas,
c'est
une
10
videos,
anaïs
think
I'll,
be
used
in
helsinki
bildt,
using
the
march
of
protocol
daily
news
with
typical
rest
to
buy
in
10
exa
mple
everytime.
Someone
is
connected
to
wed
page
icahn
motion
button
to
dispatch
tout
broadcast
est,
née
moggi
to
hold
you
there
connected
devices
that,
as
en
200
pages
to
do
that,
we
need
the
server
to
push
de
delta
both
claim
mindadze.
First,
we,
the
post,
request
comme
from
first
device
to
from
servers
from
that.
A
Actually,
if
from
clint
easwood
bother,
you
can
not
use
arrhythmia
or
participate
in
it
to
connect
from
servers
via
web
to
habits,
capabilities
for
security
reasons,
mostly
nf2
clienti
rights
in
web
browser,
then
you
have
to
use
and
throw
teepee
soa
from
beginning
of
the
web
at
least
de
only
way
you
have
to
made
delta
server
form
1
to
using
servers.
Such
de
klein
diaries
something
new
and
3
pauline.
A
So
when
you
use
pauline
huge
street
view
at
omn,
ium
server
and
in
javascript
or
quicktime
her
and
from
time
to
time,
you
will
send
the
request
to
know
any
cat
that
feed
you
something
10
is
not
hollywood
solution,
because
you
will
you,
you
will
self
conditions
chills.
Six
servers
live
for
nothing
by
kostoff
of
cables
will
be
done.
Why
do
with
nothing
new
and
it
will
be
useless
n
2
in
Serbian,
viktor
orban,
as
they
say,
approach
and
our
hearing
all
time
will
have
to
wait
for
de
timer.
A
Everything
you
forget
finish
everything
check
if
there
is
something
you
so
I
can
be.
The
large
latency
can
be
used
il
est.
So
it's
not
very,
very
good
solo.
There
is
another
wyman
solutions
that
is,
he
is
also
need
to
have
store.
Websocket
is
not
the
way
studio
photo
coop,
ozzie,
troc,
balsillie
de
clients'
wilfrid
united,
who
collects
everything
the
web
serve
and
then
of
specific,
clients'
using
and
chipie
and
of
will
ask
the
server
to
upgrade
from
connection
to
another
code.
Protocol
date
is
not
and
chippis
votes
to
thizy
websocket
10
protocol.
A
It
interesting
bought
a
zoo
lot
of
the
back
soon,
we'll
see
that
in
the
next
states
inside
thing
capabilities
date
is
full
duplex
protocol.
It
means
server
date,
kahn,
touch
of
aita
all
of
caion
and
fly
and
can
say
die
tote
of
servers
to
and
finally,
we
have
the
third
auction,
exact,
all
its
of
heaven
source
protocol
of
servers
cents,
yvette
10
tiny
protocol
is
bilton
top
office.
A
Qui
dit
butt
hitfix
is
the
problem
of
the
exciting
polling,
basic
strategy,
the
two
clients,
wilfrid
entity,
connection
of
servers
boots
disconnection
will
stay
open,
drill,
an
expert
anthem,
600
server
connections
will
be
able
to
push
his
message:
cheese,
an
indie
stein
and
protocols
to
doc
link
a
message:
urbi
proust
server
lease,
both
javascript
clients,
jahres-
that
call
back
will
be
triggered
by
the
wood
brothers
big
other
web
browser.
I'm
eighteen
supporter,
ford,
10
protocol
says
this
protocol.
It
notes
full
duplex
protocol
only
of
servers.
They
touch
h,
its
all
from
kate.
A
A
A
Sauce
the
lot
of
native
capabilities
adverline
tourist
strong
in
this
sense,
because
it
is
built,
au,
profil
type-
I
it
has
authorization
supports,
so
you
can
use
cookies.
You
can
use
authorized
scheiber
and
will
work
because
it
be
tough,
8000,
websocket
de
with
nothing
like
that.
If
you
want
some
good
is
kind
of
people
who
will
have
to
do
that
by
also
diaries
will
support
connection.
A
Will
we
look
at
you
will
have
to
do
that
by
on
sais
with
the
state
reconciliation
mechanism,
bildt
writing
to
serve
at
this
service
door
event
and
even
protocol.
It
mean
that
if
there
is
a
network
fire
and
that
some
messaging
aalst
den
of
bowser
will
keep
in
memory
of
heidi
of
aft
message
of
asthma
and
said
it
was
and
when
the
network
will
be
back,
it
will
cents
or
servers
size
of
the
latte
off,
but
must
de
l'ast
message
I
have
and
server
will
be
played
with
all
the
mist
message
is
with
websocket.
A
If
you
want
some
things
like
that,
you
have
to
bill
date,
barrios,
bayonnais
and
finally,
servers.
This
event
at
the
night
is
history
of
all
the
event
that
have
been
seen
and
you
can
ask
for
not
steven.
They
sum
things
that
it
is
not
available
in
the
what,
in
de
websocket
pole
left
of
reese
another
big
problem
for
modern
application,
this
list
with
websockets
date
websocket,
it
has
been
obsolete,
teambuy
from
typical
aichi
all
photo
co.
A
So
from
rational
binda
this,
that
is
to
be
to
ease
of
our
ivankovic
protocol,
and
now
I
tahiti
valid
capabilities.
Both
servers
key
are
veritate
where
client,
so
we
don't
need
another
obscure
alan
protocol.
Wyse
du
tpiy.
We
can
just
use
planes,
auld
is
stupid
and
they
sting
everything
to
cysts
all
alone
purpose
to
a
bump.
Wade
sow.
A
Until
they
want
to
know
brothers
world
to
use
websocket
when
using
anesthesia,
picchu
connection,
a
style
now,
firefox
is
not
able
to
use.
Wysocka
type
of
connection
is
using
typical
x
by
design,
because,
if
you
like
it
easy
to
you,
don't
millwood
socket,
annie
moore
and
steve
juhasz
capabilities
similar
to
websocket
built
in
finally,
a
friend
websocket
yves
hard
to
secure
and
suspicious
areas
of
five
boxes
and
security.
A
Mothers
of
wood
brothers
forum,
stearns,
coors
iron
tour
respectively,
websocket,
its
lower
the
greens
protocol
level
protocol
to
ivry
hard
to
secure
and
stones
ce
one
of
the
most
dangerous
security
vulnerability.
Funding,
schubert
netease
last
year,
watts
because
they
were
unable
to
secure
potter.
Liberals
websocket,
implement
hln,
gallardo
qb1,
useful
stib.
A
B
A
Mai,
au
smi/sli,
two
things:
first
x,
ris
screaming
specs,
ing,
2
protocols,
india,
diaries,
yes
farm,
vitamin
supplementation
go
that
she
is
the
free
and
open
source
software
that
you
can
use.
There
is
no
training
system
to
treat
isync
y
ait
using
opening
post
beauce
can
be
found,
tons
of
mercury
d,
'or
touax
website
and
hum
de
mercury
repositories.
Young
inc.
A
Fort
mercury
is
to
add,
is
ync
and
we
all
time
capabilities
to
you
exist
him
or
new,
stay
off
graft
on
the
axes
it
as
the
night
yves
authorization
mechanism,
bilton
top
of
the
beauty,
10
mechanized
m
alosi,
all
and
private
update
data
secure.
It
has
supports
force
serving
the
five
pieces.
Chili
stacks
108
isabelle
to
handle
he
wouldn't
offer
persists
a
connection
without
paul
your
thing
you
application
server.
Without
the
thing
that
to
you
server
applications,
1u
taznakht.
He
strongly
supports
a
crypt.
B
A
Important
concept,
one
of
mercury
protocol,
if
the
hub
glasses-
I
want
you-
want
to
podcast
message
all
the
client
of
will
be
domain,
compote
the
take
that
you
and
pricked
on
the
server
at
the
foot
of
the
tracks,
server,
sql
server.
That
will
serve
your
way.
You
want
accents
punk
to
send
sleep
sim
data
in
real
time
to
de
claims.
To
do
that.
A
Two
servers
just
had
to
scene
of
singles
poste
request
to
mercury
n
single
poste,
requests
very
easy
to
meet.
You
up
will
take
care
of
dispatching
broadca
sting,
dc26
hall,
2
kg
aurélie,
connected
devices
that
will
use
saint-yves
servers.
This
jump
hall
of
devices
connect
or
connect
where
the
mercury
around
6
tons
connection
between
the
us
and
devices.
Every
time
flies,
it
can
be
observed.
Sharon
stone
this
one
to
one
caste
message
to
all
the
devices
I
just
had
to
send
single
post
west
the
concept
and
verizon.
A
A
A
Dominique
willaeys
chipie
one
for
every
single
and
chippis
connection.
You
need
to
quit
newtee
cipi
connection,
xnote
de
kyle,
any
more
waity
type
I
do
without
you
keep
it
to.
There
will
be
un
nor
single.
This
hippie
connection
audio
said
peewees
x
type
is
for
all
2
http
request
and
all
the
request
and
responses
will
be
seen
in
parallel
texts
or
multiplexing
mechanism.
All
say
single,
this
hippie
connection
it
mean
that
there
are
no
limits
any
more
of
aesthetic
connection.
This
can
be
burning
parallel
from
claims
to
server.
It
was
de
pied.
A
It
was
the
case
with
the
deep
in
one,
that's
not
de
kate,
and
it
means
that,
because
hall
de
connection
to
a
part
in
the
line
of
its
multiple
connections,
around
7
p.m.
head
of
cruelty,
many
hefti
fi
connection
un
hic
be
mercury
shads
to
bill
of
full
duplex
protocol
at
the
top
at
the
festi
tipi.
It
will
work
varnish
well
on
top
of
ecstasy,
pitou,
sp
shalit
and
the
nifff
they
check
can
work
with
each
day,
one
with
some
limited.
A
And
justifies
everything
he
said:
white
lies
with
level
actually
la
inti.
Five
ghosts
of
all
in
internet
users
are
device,
beautiful,
all
sealed
fold
type
it's
so
you
can
use
team
I
to
it
production
rig
htnow,
so
you
can
benefit
of
multiplexing
m2
capabilities
of
mercury
protocol
right
now
and
for
files
person,
file,
mining
people,
new
kind
falls.
Mercury
will
automatically
fullback
in
haiti
type.
I
was
so
it
will
be
les
fastes
fort
de
tous,
les
biopics,
slower
Monday
and
where
they
absolvent
dresses
strong
axes
of
five
people.
A
A
A
A
Yo?
U
must
auto
rising
bergie
de
gilles
bonutti
token
empires
is
that
they
find
in
de
10
bureaus
stoidis
bearer
raider
bastard.
He
fixes
d'attin
de
slide.
Hindus
pass
de
topic,
un
de
delta,
corresponding
doggy
de
messages,
rights
form,
dayton,
solidarity,
revisit
this
simpl
post
with
forman
coding,
22
topic,
x2
channel
in
from
helsinki
and
specifications
ndiaye
text
from
compton
top
dogs,
and
that's
all
when
you
do
that
from
diomède
gilles
bosquet
il
brush
captive,
rosberg
plastic,
ou
de
bail
from
up
to
all
the
cure
includes
connected
use,
saubi
cozic,
this
simpl
estipouy
quest.
A
A
Just
loop,
the
schwahn
we7
of
consult
of
the
west
side
story,
rich
wilson,
jason
and
we
use
of
2.2
capabilities
of
symfony
leaves
dead
or
broadcast
d
isney
sic
to
subscribe.
It's
also
supported
right
in
the
browser.
You
don't
need
some
plugin
for
some
software
development
kit.
You
don't
mean
anything.
You
can
use
de
heaven
source
class
that
if,
in
all
modern
bronze,
so
you
connect
by
johann
roques
de
mercury
wayne.
Newell
dress
a
new
pass
to
score
by
list
of
topix
lover
of
list
of
china.
We
are
all
who
all
cross
one.
A
Every
time
he
said,
dystopian
matching
will
be
cents,
it
will
be
gone.
Jahres
colbac
will
be
able
to
call
you
enjoy
vasco
de
colle
en
forme
en
stand
by
example,
heidi
col
de
jason,
1
hi
hi
display
et
in
de
consoles,
but
for
you
applied
chain
you
will
probably
dewsbury
wrongly
viewer,
something
like
that
to
be
notified
when
the
new
ventures
and
do
something
is
the
gates.
A
You
can't
stop
crying
all
and
the
topix
rail
using
the
same
connection
and
ayew.
This
mourning
or
asset
classes
built
in
most
modern
brothers
to
build
your
way.
A
night
of
tribe,
ayad,
serval
topic
by
listener,
socke
se
ra
bintou,
is
really
the
top
picks
and
death
of
every
time.
There
will
be
e
book
by
new
beau
corniaud
review.
Michael
bach
will
be
cool.
A
Do
is
also
support
for
patterns
of
using
by
juraj
topix,
like
just
at
sindelfingen
specifications.
By
the
way,
using
your
eyes
template
ford,
chanel
snakes.
We
used
by
template
fort
il
mercury
two
for
another
new
skies.
There
is
a
17th
pole,
dance,
both
robberies,
syntax,
we
say
evry
topic
matching
10
patterns.
A
A
A
The
discovery
mechanism
sort,
if
you
want
existing,
remained
pia
on
the
a10
one
you
can
adlink
and
of
hours
to
tell
of
claims
that
if
I
want
to
subscribe
to
the
u
pdate
for
this
day,
that
has
been,
we
try
to
dry
planning
and
treat
mercury
connection.
Both
virtues
dress
using
de
you
well
of
say,
yes,
source,
slash
books
loose
one
for
one
stop
cim-10
example
as
de
topic:
c'est,
xavier
simpl,
but
it's
very
binding
nicosia
talos
of
customers'
or
auto-
discover
that
it
can.
A
Software
update
of
the
other
chen
mechanism,
solix
bilton,
top
10
of
beauty,
is
how
does
to
mark
smith.
She
has
intended
for
their
right
or
get
it
can
be
of
username
dead.
Two
groups,
alstom
publishes
shirt
ou
send
to
publish
object,
must
be
you
tomczyk
haiti.
Six
hairdressers
can
be
anonymus,
but
most
beautiful
thing
to
be
able
to
resign
private
top
10.
A
So
french
town
et
ouiils,
n',
have
example
we7
cookies
with
objects
from
rio
tinto.
She
continues
to
target
n
10
because
of
brothers
will
send
that
tool.
Why
try
to
from
hub
wath
review
from
same
sources?
Connection?
That's
how
we
need
for
authorization.
Mecha
nisme
de
hub
will
win
the
cookie
extract
de
target
fondacci
de
beauty,
and
when
I
will
resize
an
update
with
you
give
and
target
it
will
boc
caste
it
only
to
day
use
of
having
de
la
owner
gets
in
der
gino
bonutti
tokyo.
A
Ce
mercury
à
bize
wikango
is
open
source.
It
fast
in
very
easy
to
use
le
calme
rabbit
hole,
github
to
run
it.
It
just
single
come,
and
so
you
have
to
specified
gino
bonutti
key
to
run
it
in
production
unit,
avec,
titi,
piece,
annie,
darisse,
bulting,
hating
bear
the
risk
is
difficult,
just
have
to
7
days
domain
name
and.
A
If
you
are
using
cube
and
renée,
think
you
can
dance
talent,
mercuryy,
bonior,
schubert
native
cluster,
just
by
taiping
disco,
music
from
provided
m
chat,
darrat
native
implement
scale,
this
actually
a
cane
a
playmate
from
mercury
protocol
without
club.
If
you
are
using
or
not
just,
you
can't
handle
de
persiste
a
e
direct
connection,
the
bayous
room
fix
you
want
to
have
go,
live
to
have
hugo
to
our
youth.
The
city
is
beautiful.
It
takes
between
itunes,
hobbes,
underwood
manager,
young
people
with
our
ability
supports
that
is
provided
in
mercury.
A
B
A
A
A
Email
pillay
platform
rolls
hawk
eye
and,
to
that
to
mrs
may,
tive
supports
strong
mercury
protocol
seals
to
have
co
generators
ucanews
to
generate
as
of
kayhan
specification,
fort
oui
act
where
the
cnps
haiti
view
quazal
toxic
water,
but
single
trap,
place
ayel,
something
like
dat
using
application
aurillac
and
will
james
statesman
le
postollec
ouest
two
text
server
servers
date,
my
en
titi
as
been
modified,
anwyl
broadcast
of
new
verge
of
duty
thai
to
hold
up
your
own
cli
connected
devices
using
opening
protocol.
You,
as
you
can
see,
and
stories
of
mobiles
he
confessed.
A
Merci,
au
site
caster
des
is
supported
by
day
china
taipei
specifications,
so
you
can
message
document
is
that
are
cents
tulio
mercurial
using
simply
to
do
that?
It's
very
very
easy.
You
just
have
to
set
in
de
helsinki
iamal
file
de.
You
are
well
of
your
makers
de
photos,
collages
bertieaux
and
disk,
while
using
jason,
ce
qui,
m'a
de
constraints,
au
fjord,
bates,
option
messaging
and
that's
all
it
works
will
try.
Murder
show
that
you
fields
in
fine
said
stop
interest
in
m.