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json.go
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json.go
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// Copyright (C) 2019-2023, Ava Labs, Inc. All rights reserved.
// See the file LICENSE for licensing terms.
package rpc
import (
"bytes"
"context"
"fmt"
"net/http"
"net/url"
rpc "github.com/gorilla/rpc/v2/json2"
)
func SendJSONRequest(
ctx context.Context,
uri *url.URL,
method string,
params interface{},
reply interface{},
options ...Option,
) error {
requestBodyBytes, err := rpc.EncodeClientRequest(method, params)
if err != nil {
return fmt.Errorf("failed to encode client params: %w", err)
}
ops := NewOptions(options)
uri.RawQuery = ops.queryParams.Encode()
request, err := http.NewRequestWithContext(
ctx,
"POST",
uri.String(),
bytes.NewBuffer(requestBodyBytes),
)
if err != nil {
return fmt.Errorf("failed to create request: %w", err)
}
request.Header = ops.headers
request.Header.Set("Content-Type", "application/json")
resp, err := http.DefaultClient.Do(request)
if err != nil {
return fmt.Errorf("failed to issue request: %w", err)
}
// Return an error for any non successful status code
if resp.StatusCode < 200 || resp.StatusCode > 299 {
// Drop any error during close to report the original error
_ = resp.Body.Close()
return fmt.Errorf("received status code: %d", resp.StatusCode)
}
if err := rpc.DecodeClientResponse(resp.Body, reply); err != nil {
// Drop any error during close to report the original error
_ = resp.Body.Close()
return fmt.Errorf("failed to decode client response: %w", err)
}
return resp.Body.Close()
}