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71 lines
1.9 KiB
71 lines
1.9 KiB
package rpcclient
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import (
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"fmt"
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"io/ioutil"
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"net/http"
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"github.com/pkg/errors"
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amino "github.com/tendermint/go-amino"
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types "github.com/tendermint/tendermint/rpc/lib/types"
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)
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const (
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// URIClientRequestID in a request ID used by URIClient
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URIClientRequestID = types.JSONRPCIntID(-1)
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)
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// URIClient is a JSON-RPC client, which sends POST form HTTP requests to the
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// remote server.
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//
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// Request values are amino encoded. Response is expected to be amino encoded.
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// New amino codec is used if no other codec was set using SetCodec.
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//
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// URIClient is safe for concurrent use by multiple goroutines.
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type URIClient struct {
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address string
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client *http.Client
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cdc *amino.Codec
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}
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var _ HTTPClient = (*URIClient)(nil)
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// NewURIClient returns a new client.
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// The function panics if the provided remote is invalid.
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func NewURIClient(remote string) *URIClient {
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clientAddress, err := toClientAddress(remote)
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if err != nil {
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panic(fmt.Sprintf("invalid remote %s: %s", remote, err))
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}
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return &URIClient{
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address: clientAddress,
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client: DefaultHTTPClient(remote),
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cdc: amino.NewCodec(),
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}
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}
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// Call issues a POST form HTTP request.
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func (c *URIClient) Call(method string, params map[string]interface{}, result interface{}) (interface{}, error) {
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values, err := argsToURLValues(c.cdc, params)
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if err != nil {
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return nil, errors.Wrap(err, "failed to encode params")
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}
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resp, err := c.client.PostForm(c.address+"/"+method, values)
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if err != nil {
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return nil, errors.Wrap(err, "PostForm failed")
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}
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defer resp.Body.Close() // nolint: errcheck
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responseBytes, err := ioutil.ReadAll(resp.Body)
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if err != nil {
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return nil, errors.Wrap(err, "failed to read response body")
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}
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return unmarshalResponseBytes(c.cdc, responseBytes, URIClientRequestID, result)
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}
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func (c *URIClient) Codec() *amino.Codec { return c.cdc }
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func (c *URIClient) SetCodec(cdc *amino.Codec) { c.cdc = cdc }
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