gRPC and Swagger annotation differences
I have a protocol buffer definition, which includes google.protobuf.Timestamp
as part of a message. The Timestamp message is pretty simple and has the following definition:
message Timestamp {
int64 seconds = 1;
int32 nanos = 2;
}
So the gRPC payload comes out as a simple tuple of values as expected. However I also wanted to generate some swagger annotations for REST API for the same message, but it seems to convert the Timestamp into an RFC 3339 style string:
"timestamp": {
"type": "string",
"format": "date-time",
"title": "timestamp"
}
I recently started working with protocol buffers and gRPC, so I am not sure if I am missing something here, but it seems to be an inconsistency with grpc-gateway implementation. Why would REST be a different format than the gRPC payload? Or am I missing some way to tell protoc-gen-swagger not to convert the message into a string?
go swagger protocol-buffers grpc-gateway
add a comment |
I have a protocol buffer definition, which includes google.protobuf.Timestamp
as part of a message. The Timestamp message is pretty simple and has the following definition:
message Timestamp {
int64 seconds = 1;
int32 nanos = 2;
}
So the gRPC payload comes out as a simple tuple of values as expected. However I also wanted to generate some swagger annotations for REST API for the same message, but it seems to convert the Timestamp into an RFC 3339 style string:
"timestamp": {
"type": "string",
"format": "date-time",
"title": "timestamp"
}
I recently started working with protocol buffers and gRPC, so I am not sure if I am missing something here, but it seems to be an inconsistency with grpc-gateway implementation. Why would REST be a different format than the gRPC payload? Or am I missing some way to tell protoc-gen-swagger not to convert the message into a string?
go swagger protocol-buffers grpc-gateway
add a comment |
I have a protocol buffer definition, which includes google.protobuf.Timestamp
as part of a message. The Timestamp message is pretty simple and has the following definition:
message Timestamp {
int64 seconds = 1;
int32 nanos = 2;
}
So the gRPC payload comes out as a simple tuple of values as expected. However I also wanted to generate some swagger annotations for REST API for the same message, but it seems to convert the Timestamp into an RFC 3339 style string:
"timestamp": {
"type": "string",
"format": "date-time",
"title": "timestamp"
}
I recently started working with protocol buffers and gRPC, so I am not sure if I am missing something here, but it seems to be an inconsistency with grpc-gateway implementation. Why would REST be a different format than the gRPC payload? Or am I missing some way to tell protoc-gen-swagger not to convert the message into a string?
go swagger protocol-buffers grpc-gateway
I have a protocol buffer definition, which includes google.protobuf.Timestamp
as part of a message. The Timestamp message is pretty simple and has the following definition:
message Timestamp {
int64 seconds = 1;
int32 nanos = 2;
}
So the gRPC payload comes out as a simple tuple of values as expected. However I also wanted to generate some swagger annotations for REST API for the same message, but it seems to convert the Timestamp into an RFC 3339 style string:
"timestamp": {
"type": "string",
"format": "date-time",
"title": "timestamp"
}
I recently started working with protocol buffers and gRPC, so I am not sure if I am missing something here, but it seems to be an inconsistency with grpc-gateway implementation. Why would REST be a different format than the gRPC payload? Or am I missing some way to tell protoc-gen-swagger not to convert the message into a string?
go swagger protocol-buffers grpc-gateway
go swagger protocol-buffers grpc-gateway
edited Nov 13 at 8:56
Grokify
7,23822237
7,23822237
asked Nov 13 at 8:14
pinkstone
348
348
add a comment |
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1 Answer
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I am not that familiar with protoc-gen-swagger itself, but I believe this is happening because of the json-proto format defined here:
https://developers.google.com/protocol-buffers/docs/proto3#json
It's done this way to make it more "natural" for JSON-based APIs.
I don't know of any way to avoid this except by using your own type to hold the timestamp instead of google.protobuf.Timestamp
. However, JSON conversion is expected to work correctly in both directions, so when the JSON is converted back to a proto message by the library, it should not cause any problems.
Hey @DougFawley, you are right, that seems to be the way it is. Code in protoc-gen-swagger literally checks for "google.protobuf.Timestamp" type and builds a string. It's great to have a consistent rfc3339-type string, but from the code efficiency point of view, it's a conversion of a string back and forth from secs/nanosecs format. But again, what am I talking about when discussing REST and json payload anyways - everything is a string! our sdk on the other side is C++, so the conversion back is not as straightforward, so I ended up defining my own "Timestamp" message and that helped.
– pinkstone
Nov 19 at 22:32
add a comment |
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1 Answer
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votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
I am not that familiar with protoc-gen-swagger itself, but I believe this is happening because of the json-proto format defined here:
https://developers.google.com/protocol-buffers/docs/proto3#json
It's done this way to make it more "natural" for JSON-based APIs.
I don't know of any way to avoid this except by using your own type to hold the timestamp instead of google.protobuf.Timestamp
. However, JSON conversion is expected to work correctly in both directions, so when the JSON is converted back to a proto message by the library, it should not cause any problems.
Hey @DougFawley, you are right, that seems to be the way it is. Code in protoc-gen-swagger literally checks for "google.protobuf.Timestamp" type and builds a string. It's great to have a consistent rfc3339-type string, but from the code efficiency point of view, it's a conversion of a string back and forth from secs/nanosecs format. But again, what am I talking about when discussing REST and json payload anyways - everything is a string! our sdk on the other side is C++, so the conversion back is not as straightforward, so I ended up defining my own "Timestamp" message and that helped.
– pinkstone
Nov 19 at 22:32
add a comment |
I am not that familiar with protoc-gen-swagger itself, but I believe this is happening because of the json-proto format defined here:
https://developers.google.com/protocol-buffers/docs/proto3#json
It's done this way to make it more "natural" for JSON-based APIs.
I don't know of any way to avoid this except by using your own type to hold the timestamp instead of google.protobuf.Timestamp
. However, JSON conversion is expected to work correctly in both directions, so when the JSON is converted back to a proto message by the library, it should not cause any problems.
Hey @DougFawley, you are right, that seems to be the way it is. Code in protoc-gen-swagger literally checks for "google.protobuf.Timestamp" type and builds a string. It's great to have a consistent rfc3339-type string, but from the code efficiency point of view, it's a conversion of a string back and forth from secs/nanosecs format. But again, what am I talking about when discussing REST and json payload anyways - everything is a string! our sdk on the other side is C++, so the conversion back is not as straightforward, so I ended up defining my own "Timestamp" message and that helped.
– pinkstone
Nov 19 at 22:32
add a comment |
I am not that familiar with protoc-gen-swagger itself, but I believe this is happening because of the json-proto format defined here:
https://developers.google.com/protocol-buffers/docs/proto3#json
It's done this way to make it more "natural" for JSON-based APIs.
I don't know of any way to avoid this except by using your own type to hold the timestamp instead of google.protobuf.Timestamp
. However, JSON conversion is expected to work correctly in both directions, so when the JSON is converted back to a proto message by the library, it should not cause any problems.
I am not that familiar with protoc-gen-swagger itself, but I believe this is happening because of the json-proto format defined here:
https://developers.google.com/protocol-buffers/docs/proto3#json
It's done this way to make it more "natural" for JSON-based APIs.
I don't know of any way to avoid this except by using your own type to hold the timestamp instead of google.protobuf.Timestamp
. However, JSON conversion is expected to work correctly in both directions, so when the JSON is converted back to a proto message by the library, it should not cause any problems.
answered Nov 14 at 19:35
Doug Fawley
1613
1613
Hey @DougFawley, you are right, that seems to be the way it is. Code in protoc-gen-swagger literally checks for "google.protobuf.Timestamp" type and builds a string. It's great to have a consistent rfc3339-type string, but from the code efficiency point of view, it's a conversion of a string back and forth from secs/nanosecs format. But again, what am I talking about when discussing REST and json payload anyways - everything is a string! our sdk on the other side is C++, so the conversion back is not as straightforward, so I ended up defining my own "Timestamp" message and that helped.
– pinkstone
Nov 19 at 22:32
add a comment |
Hey @DougFawley, you are right, that seems to be the way it is. Code in protoc-gen-swagger literally checks for "google.protobuf.Timestamp" type and builds a string. It's great to have a consistent rfc3339-type string, but from the code efficiency point of view, it's a conversion of a string back and forth from secs/nanosecs format. But again, what am I talking about when discussing REST and json payload anyways - everything is a string! our sdk on the other side is C++, so the conversion back is not as straightforward, so I ended up defining my own "Timestamp" message and that helped.
– pinkstone
Nov 19 at 22:32
Hey @DougFawley, you are right, that seems to be the way it is. Code in protoc-gen-swagger literally checks for "google.protobuf.Timestamp" type and builds a string. It's great to have a consistent rfc3339-type string, but from the code efficiency point of view, it's a conversion of a string back and forth from secs/nanosecs format. But again, what am I talking about when discussing REST and json payload anyways - everything is a string! our sdk on the other side is C++, so the conversion back is not as straightforward, so I ended up defining my own "Timestamp" message and that helped.
– pinkstone
Nov 19 at 22:32
Hey @DougFawley, you are right, that seems to be the way it is. Code in protoc-gen-swagger literally checks for "google.protobuf.Timestamp" type and builds a string. It's great to have a consistent rfc3339-type string, but from the code efficiency point of view, it's a conversion of a string back and forth from secs/nanosecs format. But again, what am I talking about when discussing REST and json payload anyways - everything is a string! our sdk on the other side is C++, so the conversion back is not as straightforward, so I ended up defining my own "Timestamp" message and that helped.
– pinkstone
Nov 19 at 22:32
add a comment |
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