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