commands/http: Moved HTTP RPC into commands/http package

commands/http/client.go

+package http
+
+import (
+	"encoding/json"
+	"fmt"
+	"net/http"
+	"strings"
+
+	cmds "github.com/jbenet/go-ipfs/commands"
+)
+
+const ApiPath = "/api/v0"
+
+func Send(req cmds.Request) (cmds.Response, error) {
+	// TODO: load RPC host from config
+	url := "http://localhost:8080" + ApiPath
+	url += "/" + strings.Join(req.Path(), "/")
+
+	// TODO: support other encodings once we have multicodec to decode response
+	//       (we shouldn't have to set this here)
+	encoding := cmds.JSON
+	req.SetOption(cmds.EncShort, encoding)
+
+	query := "?"
+	options := req.Options()
+	for k, v := range options {
+		query += "&" + k + "=" + v.(string)
+	}
+
+	httpRes, err := http.Post(url+query, "application/octet-stream", req.Stream())
+	if err != nil {
+		return nil, err
+	}
+
+	res := cmds.NewResponse(req)
+
+	contentType := httpRes.Header["Content-Type"][0]
+	contentType = strings.Split(contentType, ";")[0]
+
+	if contentType == "application/octet-stream" {
+		res.SetValue(httpRes.Body)
+		return res, nil
+	}
+
+	// TODO: decode based on `encoding`, using multicodec
+	dec := json.NewDecoder(httpRes.Body)
+
+	if httpRes.StatusCode >= http.StatusBadRequest {
+		e := cmds.Error{}
+		err = dec.Decode(&e)
+		if err != nil {
+			fmt.Println(err)
+			return nil, err
+		}
+
+		res.SetError(e, e.Code)
+
+	} else {
+		var v interface{}
+		err = dec.Decode(&v)
+		if err != nil {
+			fmt.Println(err)
+			return nil, err
+		}
+
+		res.SetValue(v)
+	}
+
+	return res, nil
+}