First step of combination.

pkg/client/request.go

@@ -0,0 +1,145 @@
+/*
+Copyright 2014 Google Inc. All rights reserved.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package client
+
+import (
+	"bytes"
+	"io"
+	"io/ioutil"
+	"net/http"
+	"net/url"
+	"path"
+	"time"
+
+	"github.com/GoogleCloudPlatform/kubernetes/pkg/api"
+	"github.com/GoogleCloudPlatform/kubernetes/pkg/labels"
+)
+
+// Server contains info locating a kubernetes api server.
+// Example usage:
+// auth, err := LoadAuth(filename)
+// c := New(url, auth)
+// resp, err := c.Verb("GET").
+//	Path("api/v1beta1").
+//	Path("pods").
+//	Selector("area=staging").
+//	Timeout(10*time.Second).
+//	Do()
+// list, ok := resp.(api.PodList)
+
+// Begin a request with a verb (GET, POST, PUT, DELETE)
+func (c *Client) Verb(verb string) *Request {
+	return &Request{
+		verb: verb,
+		c:    c,
+		path: "/",
+	}
+}
+
+// Request allows for building up a request to a server in a chained fashion.
+type Request struct {
+	c        *Client
+	err      error
+	verb     string
+	path     string
+	body     interface{}
+	selector labels.Selector
+	timeout  time.Duration
+}
+
+// Append an item to the request path. You must call Path at least once.
+func (r *Request) Path(item string) *Request {
+	if r.err != nil {
+		return r
+	}
+	r.path = path.Join(r.path, item)
+	return r
+}
+
+// Use the given item as a resource label selector. Optional.
+func (r *Request) Selector(item string) *Request {
+	if r.err != nil {
+		return r
+	}
+	r.selector, r.err = labels.ParseSelector(item)
+	return r
+}
+
+// Use the given duration as a timeout. Optional.
+func (r *Request) Timeout(d time.Duration) *Request {
+	if r.err != nil {
+		return r
+	}
+	r.timeout = d
+	return r
+}
+
+// Use obj as the body of the request. Optional.
+// If obj is a string, try to read a file of that name.
+// If obj is a []byte, send it directly.
+// Otherwise, assume obj is an api type and marshall it correctly.
+func (r *Request) Body(obj interface{}) *Request {
+	if r.err != nil {
+		return r
+	}
+	r.body = obj
+	return r
+}
+
+// Format and xecute the request. Returns the API object received, or an error.
+func (r *Request) Do() (interface{}, error) {
+	if r.err != nil {
+		return nil, r.err
+	}
+	finalUrl := r.c.host + r.path
+	query := url.Values{}
+	if r.selector != nil {
+		query.Add("labels", r.selector.String())
+	}
+	if r.timeout != 0 {
+		query.Add("timeout", r.timeout.String())
+	}
+	finalUrl += "?" + query.Encode()
+	var body io.Reader
+	if r.body != nil {
+		switch t := r.body.(type) {
+		case string:
+			data, err := ioutil.ReadFile(t)
+			if err != nil {
+				return nil, err
+			}
+			body = bytes.NewBuffer(data)
+		case []byte:
+			body = bytes.NewBuffer(t)
+		default:
+			data, err := api.Encode(r.body)
+			if err != nil {
+				return nil, err
+			}
+			body = bytes.NewBuffer(data)
+		}
+	}
+	req, err := http.NewRequest(r.verb, finalUrl, body)
+	if err != nil {
+		return nil, err
+	}
+	str, err := r.c.doRequest(req)
+	if err != nil {
+		return nil, err
+	}
+	return api.Decode([]byte(str))
+}