package client import ( "context" "fmt" "io/ioutil" "net/http" "strings" types "github.com/tendermint/tendermint/rpc/jsonrpc/types" ) const ( // URIClientRequestID in a request ID used by URIClient URIClientRequestID = types.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) }