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package client
import (
"context"
"fmt"
"io/ioutil"
"net/http"
"strings"
rpctypes "github.com/tendermint/tendermint/rpc/jsonrpc/types"
)
const (
// URIClientRequestID in a request ID used by URIClient
URIClientRequestID = rpctypes.JSONRPCIntID(-1)
)
// URIClient is a JSON-RPC client, which sends POST form HTTP requests to the
// remote server.
//
// URIClient is safe for concurrent use by multiple goroutines.
type URIClient struct {
address string
client *http.Client
}
var _ HTTPClient = (*URIClient)(nil)
// NewURI returns a new client.
// An error is returned on invalid remote.
// The function panics when remote is nil.
func NewURI(remote string) (*URIClient, error) {
parsedURL, err := newParsedURL(remote)
if err != nil {
return nil, err
}
httpClient, err := DefaultHTTPClient(remote)
if err != nil {
return nil, err
}
parsedURL.SetDefaultSchemeHTTP()
uriClient := &URIClient{
address: parsedURL.GetTrimmedURL(),
client: httpClient,
}
return uriClient, nil
}
// Call issues a POST form HTTP request.
func (c *URIClient) Call(ctx context.Context, method string,
params map[string]interface{}, result interface{}) (interface{}, error) {
values, err := argsToURLValues(params)
if err != nil {
return nil, fmt.Errorf("failed to encode params: %w", err)
}
req, err := http.NewRequestWithContext(
ctx,
http.MethodPost,
c.address+"/"+method,
strings.NewReader(values.Encode()),
)
if err != nil {
return nil, fmt.Errorf("new request: %w", err)
}
req.Header.Set("Content-Type", "application/x-www-form-urlencoded")
resp, err := c.client.Do(req)
if err != nil {
return nil, fmt.Errorf("post: %w", err)
}
defer resp.Body.Close()
responseBytes, err := ioutil.ReadAll(resp.Body)
if err != nil {
return nil, fmt.Errorf("read response body: %w", err)
}
return unmarshalResponseBytes(responseBytes, URIClientRequestID, result)
}