4 files changed, 133 insertions, 0 deletions
diff --git a/go/operation/allocate_volume.go b/go/operation/allocate_volume.go
new file mode 100644
index 000000000..19166eaed
--- /dev/null
+++ b/go/operation/allocate_volume.go
@@ -0,0 +1,32 @@
+package operation
+
+import (
+	"encoding/json"
+	"errors"
+	"net/url"
+	"code.google.com/p/weed-fs/go/storage"
+	"code.google.com/p/weed-fs/go/topology"
+	"code.google.com/p/weed-fs/go/util"
+)
+
+type AllocateVolumeResult struct {
+	Error string
+}
+
+func AllocateVolume(dn *topology.DataNode, vid storage.VolumeId, repType storage.ReplicationType) error {
+	values := make(url.Values)
+	values.Add("volume", vid.String())
+	values.Add("replicationType", repType.String())
+	jsonBlob, err := util.Post("http://"+dn.Url()+"/admin/assign_volume", values)
+	if err != nil {
+		return err
+	}
+	var ret AllocateVolumeResult
+	if err := json.Unmarshal(jsonBlob, &ret); err != nil {
+		return err
+	}
+	if ret.Error != "" {
+		return errors.New(ret.Error)
+	}
+	return nil
+}
diff --git a/go/operation/delete_content.go b/go/operation/delete_content.go
new file mode 100644
index 000000000..2bdb49651
--- /dev/null
+++ b/go/operation/delete_content.go
@@ -0,0 +1,16 @@
+package operation
+
+import (
+	"log"
+	"net/http"
+)
+
+func Delete(url string) error {
+	req, err := http.NewRequest("DELETE", url, nil)
+	if err != nil {
+		log.Println("failing to delete", url)
+		return err
+	}
+	_, err = http.DefaultClient.Do(req)
+	return err
+}
diff --git a/go/operation/lookup_volume_id.go b/go/operation/lookup_volume_id.go
new file mode 100644
index 000000000..516ba9129
--- /dev/null
+++ b/go/operation/lookup_volume_id.go
@@ -0,0 +1,38 @@
+package operation
+
+import (
+	"encoding/json"
+	"errors"
+	_ "fmt"
+	"net/url"
+	"code.google.com/p/weed-fs/go/storage"
+	"code.google.com/p/weed-fs/go/util"
+)
+
+type Location struct {
+	Url       string "url"
+	PublicUrl string "publicUrl"
+}
+type LookupResult struct {
+	Locations []Location "locations"
+	Error     string     "error"
+}
+
+//TODO: Add a caching for vid here
+func Lookup(server string, vid storage.VolumeId) (*LookupResult, error) {
+	values := make(url.Values)
+	values.Add("volumeId", vid.String())
+	jsonBlob, err := util.Post("http://"+server+"/dir/lookup", values)
+	if err != nil {
+		return nil, err
+	}
+	var ret LookupResult
+	err = json.Unmarshal(jsonBlob, &ret)
+	if err != nil {
+		return nil, err
+	}
+	if ret.Error != "" {
+		return nil, errors.New(ret.Error)
+	}
+	return &ret, nil
+}
diff --git a/go/operation/upload_content.go b/go/operation/upload_content.go
new file mode 100644
index 000000000..0bdb697da
--- /dev/null
+++ b/go/operation/upload_content.go
@@ -0,0 +1,47 @@
+package operation
+
+import (
+	"bytes"
+	"encoding/json"
+	"errors"
+	_ "fmt"
+	"io"
+	"io/ioutil"
+	"log"
+	"mime/multipart"
+	"net/http"
+)
+
+type UploadResult struct {
+	Size  int
+	Error string
+}
+
+func Upload(uploadUrl string, filename string, reader io.Reader) (*UploadResult, error) {
+	body_buf := bytes.NewBufferString("")
+	body_writer := multipart.NewWriter(body_buf)
+	file_writer, err := body_writer.CreateFormFile("file", filename)
+	io.Copy(file_writer, reader)
+	content_type := body_writer.FormDataContentType()
+	body_writer.Close()
+	resp, err := http.Post(uploadUrl, content_type, body_buf)
+	if err != nil {
+		log.Println("failing to upload to", uploadUrl)
+		return nil, err
+	}
+	defer resp.Body.Close()
+	resp_body, err := ioutil.ReadAll(resp.Body)
+	if err != nil {
+		return nil, err
+	}
+	var ret UploadResult
+	err = json.Unmarshal(resp_body, &ret)
+	if err != nil {
+		log.Println("failing to read upload resonse", uploadUrl, resp_body)
+		return nil, err
+	}
+	if ret.Error != "" {
+		return nil, errors.New(ret.Error)
+	}
+	return &ret, nil
+}