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bor
Commits
d9efaf75
Commit
d9efaf75
authored
Jul 3, 2015
by
Bas van Kervel
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simplified implementation and improved performance
parent
f0e94b4d
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Changes
1
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1 changed file
rpc/codec/json.go
+20
-103
20 additions, 103 deletions
rpc/codec/json.go
with
20 additions
and
103 deletions
rpc/codec/json.go
+
20
−
103
View file @
d9efaf75
...
...
@@ -15,129 +15,46 @@ const (
MAX_RESPONSE_SIZE
=
1024
*
1024
)
var
(
// No new requests in buffer
EmptyRequestQueueError
=
fmt
.
Errorf
(
"No incoming requests"
)
// Next request in buffer isn't yet complete
IncompleteRequestError
=
fmt
.
Errorf
(
"Request incomplete"
)
)
// Json serialization support
type
JsonCodec
struct
{
c
net
.
Conn
reqBuffer
[]
byte
bytesInReqBuffer
int
reqLastPos
int
d
*
json
.
Decoder
}
// Create new JSON coder instance
func
NewJsonCoder
(
conn
net
.
Conn
)
ApiCoder
{
return
&
JsonCodec
{
c
:
conn
,
reqBuffer
:
make
([]
byte
,
MAX_REQUEST_SIZE
),
bytesInReqBuffer
:
0
,
reqLastPos
:
0
,
}
}
// Indication if the next request in the buffer is a batch request
func
(
self
*
JsonCodec
)
isNextBatchReq
()
(
bool
,
error
)
{
for
i
:=
0
;
i
<
self
.
bytesInReqBuffer
;
i
++
{
switch
self
.
reqBuffer
[
i
]
{
case
0x20
,
0x09
,
0x0a
,
0x0d
:
// allow leading whitespace (JSON whitespace RFC4627)
continue
case
0x7b
:
// single req
return
false
,
nil
case
0x5b
:
// batch req
return
true
,
nil
default
:
return
false
,
&
json
.
InvalidUnmarshalError
{}
}
}
return
false
,
EmptyRequestQueueError
}
// remove parsed request from buffer
func
(
self
*
JsonCodec
)
resetReqbuffer
(
pos
int
)
{
copy
(
self
.
reqBuffer
,
self
.
reqBuffer
[
pos
:
self
.
bytesInReqBuffer
])
self
.
reqLastPos
=
0
self
.
bytesInReqBuffer
-=
pos
}
// parse request in buffer
func
(
self
*
JsonCodec
)
nextRequest
()
(
requests
[]
*
shared
.
Request
,
isBatch
bool
,
err
error
)
{
if
isBatch
,
err
:=
self
.
isNextBatchReq
();
err
==
nil
{
if
isBatch
{
requests
=
make
([]
*
shared
.
Request
,
0
)
for
;
self
.
reqLastPos
<=
self
.
bytesInReqBuffer
;
self
.
reqLastPos
++
{
if
err
=
json
.
Unmarshal
(
self
.
reqBuffer
[
:
self
.
reqLastPos
],
&
requests
);
err
==
nil
{
self
.
resetReqbuffer
(
self
.
reqLastPos
)
return
requests
,
true
,
nil
}
}
return
nil
,
true
,
IncompleteRequestError
}
else
{
request
:=
shared
.
Request
{}
for
;
self
.
reqLastPos
<=
self
.
bytesInReqBuffer
;
self
.
reqLastPos
++
{
if
err
=
json
.
Unmarshal
(
self
.
reqBuffer
[
:
self
.
reqLastPos
],
&
request
);
err
==
nil
{
requests
:=
make
([]
*
shared
.
Request
,
1
)
requests
[
0
]
=
&
request
self
.
resetReqbuffer
(
self
.
reqLastPos
)
return
requests
,
false
,
nil
}
}
return
nil
,
true
,
IncompleteRequestError
}
}
else
{
return
nil
,
false
,
err
d
:
json
.
NewDecoder
(
conn
),
}
}
//
Serialize obj to JSON
and
writ
e it to
conn
//
Read incoming request
and
pars
e it to
RPC request
func
(
self
*
JsonCodec
)
ReadRequest
()
(
requests
[]
*
shared
.
Request
,
isBatch
bool
,
err
error
)
{
if
self
.
bytesInReqBuffer
!=
0
{
req
,
batch
,
err
:=
self
.
nextRequest
()
if
err
==
nil
{
return
req
,
batch
,
err
}
if
err
!=
IncompleteRequestError
{
return
nil
,
false
,
err
}
}
// no/incomplete request in buffer -> read more data first
deadline
:=
time
.
Now
()
.
Add
(
READ_TIMEOUT
*
time
.
Second
)
if
err
:=
self
.
c
.
SetDeadline
(
deadline
);
err
!=
nil
{
return
nil
,
false
,
err
}
var
retErr
error
for
{
n
,
err
:=
self
.
c
.
Read
(
self
.
reqBuffer
[
self
.
bytesInReqBuffer
:
])
if
err
!=
nil
{
retErr
=
err
break
}
self
.
bytesInReqBuffer
+=
n
requests
,
isBatch
,
err
:=
self
.
nextRequest
()
var
incoming
json
.
RawMessage
err
=
self
.
d
.
Decode
(
&
incoming
)
if
err
==
nil
{
return
requests
,
isBatch
,
nil
isBatch
=
incoming
[
0
]
==
'['
if
isBatch
{
requests
=
make
([]
*
shared
.
Request
,
0
)
err
=
json
.
Unmarshal
(
incoming
,
&
requests
)
}
else
{
requests
=
make
([]
*
shared
.
Request
,
1
)
var
singleRequest
shared
.
Request
if
err
=
json
.
Unmarshal
(
incoming
,
&
singleRequest
);
err
==
nil
{
requests
[
0
]
=
&
singleRequest
}
if
err
==
IncompleteRequestError
||
err
==
EmptyRequestQueueError
{
continue
// need more data
}
retErr
=
err
break
return
}
self
.
c
.
Close
()
return
nil
,
false
,
retE
rr
return
nil
,
false
,
e
rr
}
func
(
self
*
JsonCodec
)
ReadResponse
()
(
interface
{},
error
)
{
...
...
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