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89 lines
2.7 KiB
Go
89 lines
2.7 KiB
Go
// Package jsonrpc provides JSON RPC utilities for serialization of AWS
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// requests and responses.
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package jsonrpc
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//go:generate go run -tags codegen ../../../models/protocol_tests/generate.go ../../../models/protocol_tests/input/json.json build_test.go
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//go:generate go run -tags codegen ../../../models/protocol_tests/generate.go ../../../models/protocol_tests/output/json.json unmarshal_test.go
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import (
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"github.com/aws/aws-sdk-go/aws/awserr"
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"github.com/aws/aws-sdk-go/aws/request"
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"github.com/aws/aws-sdk-go/private/protocol/json/jsonutil"
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"github.com/aws/aws-sdk-go/private/protocol/rest"
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)
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var emptyJSON = []byte("{}")
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// BuildHandler is a named request handler for building jsonrpc protocol
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// requests
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var BuildHandler = request.NamedHandler{
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Name: "awssdk.jsonrpc.Build",
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Fn: Build,
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}
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// UnmarshalHandler is a named request handler for unmarshaling jsonrpc
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// protocol requests
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var UnmarshalHandler = request.NamedHandler{
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Name: "awssdk.jsonrpc.Unmarshal",
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Fn: Unmarshal,
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}
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// UnmarshalMetaHandler is a named request handler for unmarshaling jsonrpc
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// protocol request metadata
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var UnmarshalMetaHandler = request.NamedHandler{
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Name: "awssdk.jsonrpc.UnmarshalMeta",
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Fn: UnmarshalMeta,
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}
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// Build builds a JSON payload for a JSON RPC request.
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func Build(req *request.Request) {
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var buf []byte
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var err error
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if req.ParamsFilled() {
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buf, err = jsonutil.BuildJSON(req.Params)
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if err != nil {
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req.Error = awserr.New(request.ErrCodeSerialization, "failed encoding JSON RPC request", err)
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return
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}
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} else {
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buf = emptyJSON
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}
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if req.ClientInfo.TargetPrefix != "" || string(buf) != "{}" {
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req.SetBufferBody(buf)
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}
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if req.ClientInfo.TargetPrefix != "" {
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target := req.ClientInfo.TargetPrefix + "." + req.Operation.Name
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req.HTTPRequest.Header.Add("X-Amz-Target", target)
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}
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// Only set the content type if one is not already specified and an
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// JSONVersion is specified.
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if ct, v := req.HTTPRequest.Header.Get("Content-Type"), req.ClientInfo.JSONVersion; len(ct) == 0 && len(v) != 0 {
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jsonVersion := req.ClientInfo.JSONVersion
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req.HTTPRequest.Header.Set("Content-Type", "application/x-amz-json-"+jsonVersion)
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}
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}
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// Unmarshal unmarshals a response for a JSON RPC service.
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func Unmarshal(req *request.Request) {
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defer req.HTTPResponse.Body.Close()
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if req.DataFilled() {
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err := jsonutil.UnmarshalJSON(req.Data, req.HTTPResponse.Body)
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if err != nil {
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req.Error = awserr.NewRequestFailure(
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awserr.New(request.ErrCodeSerialization, "failed decoding JSON RPC response", err),
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req.HTTPResponse.StatusCode,
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req.RequestID,
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)
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}
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}
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return
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}
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// UnmarshalMeta unmarshals headers from a response for a JSON RPC service.
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func UnmarshalMeta(req *request.Request) {
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rest.UnmarshalMeta(req)
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}
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