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xxmain.go
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xxmain.go
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package skyhdd
import (
"fmt"
"golang.org/x/net/context"
"google.golang.org/appengine"
"google.golang.org/appengine/log"
"google.golang.org/appengine/user"
"google.golang.org/cloud/storage"
"io"
"net/http"
)
func init() {
http.HandleFunc("/", handler)
}
type demo struct {
ctx context.Context
res http.ResponseWriter
bucket *storage.BucketHandle
client *storage.Client
}
const gcsBucket = "learning-1130.appspot.com"
func handler(res http.ResponseWriter, req *http.Request) {
if req.URL.Path != "/" {
http.NotFound(res, req)
return
}
ctx := appengine.NewContext(req)
u := user.Current(ctx)
if u == nil {
url, err := user.LoginURL(ctx, req.URL.String())
if err != nil {
http.Error(res, err.Error(), http.StatusInternalServerError)
return
}
res.Header().Set("Location", url)
res.WriteHeader(http.StatusFound)
return
}
fmt.Fprintf(res, "Hello, %v\n\n", u)
gcsClient, err := storage.NewClient(ctx)
if err != nil {
log.Errorf(ctx, "ERROR handler NewClient: ", err)
return
}
defer gcsClient.Close()
d := &demo{
ctx: ctx,
res: res,
client: gcsClient,
bucket: gcsClient.Bucket(gcsBucket),
}
d.delFiles()
d.createFiles()
d.listFiles()
}
func (d *demo) listFiles() {
io.WriteString(d.res, "OBJECTS\n")
objs, err := d.bucket.List(d.ctx, nil)
if err != nil {
log.Errorf(d.ctx, "%v", err)
return
}
for _, obj := range objs.Results {
fmt.Fprintf(d.res, "%v - %v - %v\n", obj.Name, obj.ACL, obj.MediaLink)
}
}
func (d *demo) createFiles() {
for _, n := range []string{"foo"} {
d.createFile(n)
}
}
func (d *demo) createFile(fileName string) {
wc := d.bucket.Object(fileName).NewWriter(d.ctx)
wc.ContentType = "text/plain"
wc.ACL = []storage.ACLRule{
{"user-toddmcleod@gmail.com", storage.RoleReader},
}
//wc.ACL = []storage.ACLRule{
// {"user-<some-email-here>@gmail.com", storage.RoleReader},
//}
if _, err := wc.Write([]byte("You accessed the file\n")); err != nil {
log.Errorf(d.ctx, "createFile: unable to write data to bucket %q, file %q: %v", gcsBucket, fileName, err)
return
}
if err := wc.Close(); err != nil {
log.Errorf(d.ctx, "createFile: unable to close bucket %q, file %q: %v", gcsBucket, fileName, err)
return
}
}
func (d *demo) delFiles() {
objs, err := d.bucket.List(d.ctx, nil)
if err != nil {
log.Errorf(d.ctx, "%v", err)
return
}
for _, obj := range objs.Results {
if err := d.bucket.Object(obj.Name).Delete(d.ctx); err != nil {
log.Errorf(d.ctx, "deleteFiles: unable to delete bucket %q, file %q: %v", d.bucket, obj.Name, err)
return
}
}
}