func deleteDocument(i *ec2.Instance, db *mongodb.MongoDB) error {
if i == nil {
return errors.New("nil instance")
}
var id bson.ObjectId
for _, tag := range i.Tags {
key := strings.ToLower(aws.StringValue(tag.Key))
value := strings.ToLower(aws.StringValue(tag.Value))
if key != "koding-machineid" || value == "" {
continue
}
id = bson.ObjectIdHex(value)
break
}
if !id.Valid() {
return errors.New("unable to find valid jMachine.ObjectId")
}
return db.Run(modelhelper.MachinesColl, func(c *mgo.Collection) error { return c.RemoveId(id) })
}
func AuthorNameById(id bson.ObjectId, authors []Author) string {
if !id.Valid() {
return "anon"
}
for _, author := range authors {
if author.ID == id {
fmt.Printf("matched author name %s to %s\n", author.Name, id)
return author.Name
}
}
fmt.Printf("did not match author name to %s\n", id)
return "anon"
}
func ToObjectIdOrBlankInterface(id bson.ObjectId) interface{} {
if id.Valid() {
return id
}
return ""
}
func permalinkHandler(w http.ResponseWriter, r *http.Request) {
if r.Method != "GET" && r.Method != "POST" {
w.Header().Set("Allow", "GET POST")
w.WriteHeader(http.StatusMethodNotAllowed)
w.Write([]byte(PERMALINK_HELP))
return
}
var err error
var jsonPermalink map[string]interface{}
var id bson.ObjectId
r.Body = http.MaxBytesReader(w, r.Body, MAX_REQSIZE)
if r.Method == "GET" {
r.ParseForm()
var id64str string = r.Form.Get("id")
if id64str == "" {
w.Write([]byte(PERMALINK_HELP))
return
}
/* For backwards-compatibility with permalinks from the Meteor plotter, only look at the first 16 bytes. */
var idslice []byte = make([]byte, permalinkdlen)
_, err = base64.URLEncoding.Decode(idslice, []byte(id64str)[:permalinklen])
if err != nil {
w.Write([]byte(PERMALINK_HELP))
return
}
id = bson.ObjectId(idslice)
if !id.Valid() {
w.Write([]byte(PERMALINK_BAD_ID))
return
}
var query *mgo.Query = permalinkConn.FindId(id)
err = query.One(&jsonPermalink)
if err != nil {
w.Write([]byte(PERMALINK_BAD_ID))
return
}
// I could do this asynchronously, but I think this is good enough
err = permalinkConn.UpdateId(id, map[string]interface{}{
"$set": map[string]interface{}{
"lastAccessed": bson.Now(),
},
})
if err != nil {
// In the future I could try something like restarting the connection
fmt.Printf("Could not update permalink record: %v\n", err)
}
w.Header().Set("Content-Type", "application/json; charset=utf-8")
var permalinkEncoder *json.Encoder = json.NewEncoder(w)
err = permalinkEncoder.Encode(jsonPermalink)
if err != nil {
fmt.Printf("Could not encode permlink data: %v\n", err)
}
} else {
var permalinkDecoder *json.Decoder = json.NewDecoder(r.Body)
err = permalinkDecoder.Decode(&jsonPermalink)
if err != nil {
w.Write([]byte(fmt.Sprintf("Error: received invalid JSON: %v", err)))
return
}
err = validatePermalinkJSON(jsonPermalink)
if err != nil {
w.Write([]byte(err.Error()))
return
}
id = bson.NewObjectId()
jsonPermalink["_id"] = id
jsonPermalink["lastAccessed"] = bson.Now()
err = permalinkConn.Insert(jsonPermalink)
if err == nil {
id64len := base64.URLEncoding.EncodedLen(len(id))
id64buf := make([]byte, id64len, id64len)
base64.URLEncoding.Encode(id64buf, []byte(id))
w.Write(id64buf)
} else {
w.WriteHeader(http.StatusInternalServerError)
w.Write([]byte(fmt.Sprintf("Could not add permalink to database: %v", err)))
}
}
}