MyFirstApp: Durability section for gophercloud

Adding the code for interact with the object storage service with go.

Change-Id: I4f994b6f8ccfca0ab858a062c9243c3a66197ddd

firstapp/samples/gophercloud/durability.go

@@ -0,0 +1,158 @@
+package main
+
+import (
+	"bufio"
+	"encoding/json"
+	"fmt"
+	"io"
+	"io/ioutil"
+	"net/http"
+	"os"
+
+	"github.com/gophercloud/gophercloud"
+	"github.com/gophercloud/gophercloud/openstack"
+	"github.com/gophercloud/gophercloud/openstack/objectstorage/v1/containers"
+	"github.com/gophercloud/gophercloud/openstack/objectstorage/v1/objects"
+	"github.com/gophercloud/gophercloud/pagination"
+)
+
+func main() {
+
+	// step-1
+	authOpts, err := openstack.AuthOptionsFromEnv()
+	if err != nil {
+		fmt.Println(err)
+		return
+	}
+
+	provider, err := openstack.AuthenticatedClient(authOpts)
+	if err != nil {
+		fmt.Println(err)
+		return
+	}
+
+	var regionName = os.Getenv("OS_REGION_NAME")
+	objectClient, err := openstack.NewObjectStorageV1(provider, gophercloud.EndpointOpts{
+		Region: regionName,
+	})
+	if err != nil {
+		fmt.Println(err)
+		return
+	}
+
+	// step-2
+	containerName := "fractals"
+	containers.Create(objectClient, containerName, nil)
+
+	// step-3
+	containers.List(objectClient, &containers.ListOpts{}).EachPage(func(page pagination.Page) (bool, error) {
+		containerList, _ := containers.ExtractNames(page)
+		for _, name := range containerList {
+			fmt.Printf("Container name [%s] \n", name)
+		}
+		return true, nil
+	})
+
+	// step-4
+	filePath := "goat.jpg"
+	objectName := "an amazing goat"
+
+	f, _ := os.Open(filePath)
+	defer f.Close()
+	reader := bufio.NewReader(f)
+
+	options := objects.CreateOpts{
+		Content: reader,
+	}
+
+	objects.Create(objectClient, containerName, objectName, options)
+
+	// step-5
+	objects.List(objectClient, containerName, &objects.ListOpts{}).EachPage(func(page pagination.Page) (bool, error) {
+		objectList, _ := objects.ExtractNames(page)
+		for _, name := range objectList {
+			fmt.Printf("Object name [%s] \n", name)
+		}
+		return true, nil
+	})
+
+	// step-6
+
+	// step-7
+
+	// step-8
+	objects.Delete(objectClient, containerName, objectName, nil)
+
+	// step-9
+
+	// step-10
+	containerName = "fractals"
+	containers.Create(objectClient, containerName, nil)
+
+	// step-11
+	endpoint := "http://IP_API_1"
+
+	resp, _ := http.Get(endpoint + "/v1/fractal")
+	defer resp.Body.Close()
+	body, _ := ioutil.ReadAll(resp.Body)
+
+	type Fractal struct {
+		UUID string `json:"uuid"`
+	}
+
+	type Data struct {
+		Results    int       `json:"num_results"`
+		Objects    []Fractal `json:"objects"`
+		Page       int       `json:"page"`
+		TotalPages int       `json:"total_pages"`
+	}
+
+	var data Data
+	json.Unmarshal([]byte(body), &data)
+
+	for _, fractal := range data.Objects {
+		r, _ := http.Get(endpoint + "/fractal/" + fractal.UUID)
+		defer r.Body.Close()
+		image := fractal.UUID + ".png"
+		out, _ := os.Create(image)
+		defer out.Close()
+		io.Copy(out, r.Body)
+
+		f, _ := os.Open(image)
+		defer f.Close()
+		reader := bufio.NewReader(f)
+
+		options := objects.CreateOpts{
+			Content: reader,
+		}
+
+		objectName = fractal.UUID
+		fmt.Printf("Uploading object [%s] in container [%s]... \n", objectName, containerName)
+		objects.Create(objectClient, containerName, objectName, options)
+	}
+
+	objects.List(objectClient, containerName, &objects.ListOpts{}).EachPage(func(page pagination.Page) (bool, error) {
+		objectList, _ := objects.ExtractNames(page)
+		for _, name := range objectList {
+			fmt.Printf("Object [%s] in container [%s] \n", name, containerName)
+		}
+		return true, nil
+	})
+
+	// step-12
+	objects.List(objectClient, containerName, &objects.ListOpts{}).EachPage(func(page pagination.Page) (bool, error) {
+		objectList, _ := objects.ExtractNames(page)
+		for _, name := range objectList {
+			fmt.Printf("Deleting object [%s] in container [%s]... \n", name, containerName)
+			objects.Delete(objectClient, containerName, name, nil)
+		}
+		return true, nil
+	})
+	fmt.Printf("Deleting container [%s] \n", containerName)
+	containers.Delete(objectClient, containerName)
+
+	// step-13
+	objects.Update(objectClient, containerName, objectName, &objects.UpdateOpts{Metadata: map[string]string{"foo": "bar"}})
+
+	// step-14
+}

firstapp/source/durability.rst

@@ -123,6 +123,13 @@ First, learn how to connect to the Object Storage endpoint:
         :start-after: step-1
         :end-before: step-2
 
+.. only:: gophercloud
+
+    .. literalinclude:: ../samples/gophercloud/durability.go
+        :language: go
+        :start-after: step-1
+        :end-before: step-2
+
 To begin to store objects, we must first make a container.
 Call yours :code:`fractals`:
 
@@ -173,6 +180,12 @@ Call yours :code:`fractals`:
         u'txc6262b9c2bc1445b9dfe3-00574277ff', u'date': u'Mon, 23 May 2016
         03:24:47 GMT', u'content-type': u'text/plain; charset=utf-8'})
 
+.. only:: gophercloud
+
+    .. literalinclude:: ../samples/gophercloud/durability.go
+        :language: go
+        :start-after: step-2
+        :end-before: step-3
 
 You should now be able to see this container appear in a listing of
 all containers in your account:
@@ -219,6 +232,13 @@ all containers in your account:
         [Munch({u'count': 0, u'bytes': 0, u'name': u'fractals'}),
         Munch({u'count': 0, u'bytes': 0, u'name': u'fractals_segments'})]
 
+  .. only:: gophercloud
+
+      .. literalinclude:: ../samples/gophercloud/durability.go
+          :language: go
+          :start-after: step-3
+          :end-before: step-4
+
 The next logical step is to upload an object. Find a photo of a goat
 online, name it :code:`goat.jpg`, and upload it to your
 :code:`fractals` container:
@@ -248,6 +268,13 @@ online, name it :code:`goat.jpg`, and upload it to your
         :start-after: step-4
         :end-before: step-5
 
+.. only:: gophercloud
+
+    .. literalinclude:: ../samples/gophercloud/durability.go
+        :language: go
+        :start-after: step-4
+        :end-before: step-5
+
 List objects in your :code:`fractals` container to see if the upload
 was successful. Then, download the file to verify that the md5sum is
 the same:
@@ -364,6 +391,13 @@ the same:
 
         d1408b5bf6510426db6e2bafc2f90854
 
+.. only:: gophercloud
+
+    .. literalinclude:: ../samples/gophercloud/durability.go
+        :language: go
+        :start-after: step-5
+        :end-before: step-6
+
 Finally, clean up by deleting the test object:
 
 .. only:: fog
@@ -421,6 +455,12 @@ Finally, clean up by deleting the test object:
 
         []
 
+.. only:: gophercloud
+
+    .. literalinclude:: ../samples/gophercloud/durability.go
+        :language: go
+        :start-after: step-8
+        :end-before: step-9
 
 Back up the Fractals from the database on the Object Storage
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
@@ -455,6 +495,13 @@ Place the images in the :code:`fractals` container:
         :start-after: step-10
         :end-before: step-11
 
+.. only:: gophercloud
+
+    .. literalinclude:: ../samples/gophercloud/durability.go
+        :language: go
+        :start-after: step-10
+        :end-before: step-11
+
 Next, back up all existing fractals from the database to the swift container.
 A simple loop takes care of that:
 
@@ -502,6 +549,12 @@ A simple loop takes care of that:
               Before you try to run the previous script, make sure that
               it is installed on your system.
 
+.. only:: gophercloud
+
+    .. literalinclude:: ../samples/gophercloud/durability.go
+        :language: go
+        :start-after: step-11
+        :end-before: step-12
 
 Configure the Fractals app to use Object Storage
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
@@ -544,6 +597,13 @@ Otherwise, the delete operation fails:
         :start-after: step-12
         :end-before: step-13
 
+.. only:: gophercloud
+
+    .. literalinclude:: ../samples/gophercloud/durability.go
+        :language: go
+        :start-after: step-12
+        :end-before: step-13
+
 .. warning:: It is not possible to restore deleted objects. Be careful.
 
 Add metadata to objects
@@ -598,6 +658,12 @@ your SDK.
         :start-after: step-13
         :end-before: step-14
 
+.. only:: gophercloud
+
+    .. literalinclude:: ../samples/gophercloud/durability.go
+        :language: go
+        :start-after: step-13
+        :end-before: step-14
 
 Large objects
 ~~~~~~~~~~~~~