swarm: plan bee for content storage and distribution on web3

This change imports the Swarm protocol codebase. Compared to the 'swarm'
branch, a few mostly cosmetic changes had to be made:

* The various redundant log message prefixes are gone.
* All files now have LGPLv3 license headers.
* Minor code changes were needed to please go vet and make the tests
  pass on Windows.
* Further changes were required to adapt to the go-ethereum develop
  branch and its new Go APIs.

Some code has not (yet) been brought over:

* swarm/cmd/bzzhash: will reappear as cmd/bzzhash later
* swarm/cmd/bzzup.sh: will be reimplemented in cmd/bzzup
* swarm/cmd/makegenesis: will reappear somehow
* swarm/examples/album: will move to a separate repository
* swarm/examples/filemanager: ditto
* swarm/examples/files: will not be merged
* swarm/test/*: will not be merged
* swarm/services/swear: will reappear as contracts/swear when needed

1 files changed, 117 insertions, 0 deletions

diff --git a/swarm/api/api_test.go b/swarm/api/api_test.go
new file mode 100644
index 000000000..b09811959
--- /dev/null
+++ b/swarm/api/api_test.go
@@ -0,0 +1,117 @@
+// Copyright 2016 The go-ethereum Authors
+// This file is part of the go-ethereum library.
+//
+// The go-ethereum library is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Lesser General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// The go-ethereum library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public License
+// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
+
+package api
+
+import (
+	"io"
+	"io/ioutil"
+	"os"
+	"testing"
+
+	"github.com/ethereum/go-ethereum/logger"
+	"github.com/ethereum/go-ethereum/logger/glog"
+	"github.com/ethereum/go-ethereum/swarm/storage"
+)
+
+func testApi(t *testing.T, f func(*Api)) {
+	datadir, err := ioutil.TempDir("", "bzz-test")
+	if err != nil {
+		t.Fatalf("unable to create temp dir: %v", err)
+	}
+	os.RemoveAll(datadir)
+	defer os.RemoveAll(datadir)
+	dpa, err := storage.NewLocalDPA(datadir)
+	if err != nil {
+		return
+	}
+	api := NewApi(dpa, nil)
+	dpa.Start()
+	f(api)
+	dpa.Stop()
+}
+
+type testResponse struct {
+	reader storage.LazySectionReader
+	*Response
+}
+
+func checkResponse(t *testing.T, resp *testResponse, exp *Response) {
+
+	if resp.MimeType != exp.MimeType {
+		t.Errorf("incorrect mimeType. expected '%s', got '%s'", exp.MimeType, resp.MimeType)
+	}
+	if resp.Status != exp.Status {
+		t.Errorf("incorrect status. expected '%d', got '%d'", exp.Status, resp.Status)
+	}
+	if resp.Size != exp.Size {
+		t.Errorf("incorrect size. expected '%d', got '%d'", exp.Size, resp.Size)
+	}
+	if resp.reader != nil {
+		content := make([]byte, resp.Size)
+		read, _ := resp.reader.Read(content)
+		if int64(read) != exp.Size {
+			t.Errorf("incorrect content length. expected '%d...', got '%d...'", read, exp.Size)
+		}
+		resp.Content = string(content)
+	}
+	if resp.Content != exp.Content {
+		// if !bytes.Equal(resp.Content, exp.Content)
+		t.Errorf("incorrect content. expected '%s...', got '%s...'", string(exp.Content), string(resp.Content))
+	}
+}
+
+// func expResponse(content []byte, mimeType string, status int) *Response {
+func expResponse(content string, mimeType string, status int) *Response {
+	glog.V(logger.Detail).Infof("expected content (%v): %v ", len(content), content)
+	return &Response{mimeType, status, int64(len(content)), content}
+}
+
+// func testGet(t *testing.T, api *Api, bzzhash string) *testResponse {
+func testGet(t *testing.T, api *Api, bzzhash string) *testResponse {
+	reader, mimeType, status, err := api.Get(bzzhash, true)
+	if err != nil {
+		t.Fatalf("unexpected error: %v", err)
+	}
+	quitC := make(chan bool)
+	size, err := reader.Size(quitC)
+	if err != nil {
+		t.Fatalf("unexpected error: %v", err)
+	}
+	glog.V(logger.Detail).Infof("reader size: %v ", size)
+	s := make([]byte, size)
+	_, err = reader.Read(s)
+	if err != io.EOF {
+		t.Fatalf("unexpected error: %v", err)
+	}
+	reader.Seek(0, 0)
+	return &testResponse{reader, &Response{mimeType, status, size, string(s)}}
+	// return &testResponse{reader, &Response{mimeType, status, reader.Size(), nil}}
+}
+
+func TestApiPut(t *testing.T) {
+	testApi(t, func(api *Api) {
+		content := "hello"
+		exp := expResponse(content, "text/plain", 0)
+		// exp := expResponse([]byte(content), "text/plain", 0)
+		bzzhash, err := api.Put(content, exp.MimeType)
+		if err != nil {
+			t.Fatalf("unexpected error: %v", err)
+		}
+		resp := testGet(t, api, bzzhash)
+		checkResponse(t, resp, exp)
+	})
+}