/
server.go
217 lines (189 loc) · 4.07 KB
/
server.go
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package baodata
import (
"encoding/json"
"errors"
"io/ioutil"
"net/http"
"strconv"
"gopkg.in/mgo.v2"
"gopkg.in/mgo.v2/bson"
)
var bd *mgo.Database
func Connect() {
session, err := mgo.Dial("127.0.0.1")
if err != nil {
panic(err)
}
bd = session.DB("baodata")
}
var sF secretHandler
type secretHandler func(string, string) (bool, error)
func SecretHandler(f func(baoId, secret string) (idValid bool, err error)) {
sF = secretHandler(f)
}
func init() {
SecretHandler(func(baoId, secret string) (isValid bool, err error) {
isValid = false
return
})
}
func Handler(w http.ResponseWriter, req *http.Request) {
bres, err := handler(w, req)
if err != nil {
bres.Error = err.Error()
}
jsonBytes, err := json.Marshal(bres)
w.Write(jsonBytes)
}
func handler(w http.ResponseWriter, req *http.Request) (bres BaoResponse, err error) {
body, err := ioutil.ReadAll(req.Body)
if err != nil {
return
}
var breq BaoRequest
err = json.Unmarshal(body, &breq)
if err != nil {
return
}
if breq.Method == "get" {
if breq.Path.Id == 0 {
bres.Data, err = dbGetAll(
breq.BaoId,
breq.Path.ResourceName,
)
return
} else {
bres.Data, err = dbGet(
breq.BaoId,
breq.Path.ResourceName,
breq.Path.Id,
)
return
}
} else if breq.Method == "put" {
bres.Data, err = dbPut(
breq.BaoId,
breq.Path.ResourceName,
breq.Path.Id,
breq.Data,
)
return
} else if breq.Method == "delete" {
err = dbDelete(
breq.BaoId,
breq.Path.ResourceName,
breq.Path.Id,
)
return
}
err = errors.New("no valid method specified")
return
}
func dbGet(baoId, resource string, id int) (data []Data, err error) {
var bdmeta BDMeta
err = bd.C(baoId).Find(
bson.M{"resource": resource, "id": id, "deleted": false},
).One(&bdmeta)
data = []Data{bdmeta.Data}
return
}
func dbGetAll(baoId, resource string) (data []Data, err error) {
var bdmeta []BDMeta
err = bd.C(baoId).Find(
bson.M{"resource": resource},
).All(&bdmeta)
for _, row := range bdmeta {
data = append(data, row.Data)
}
return
}
func dbPut(baoId, resource string, id int, newData Data) (dataOut []Data, err error) {
bdmeta := BDMeta{
Resource: resource,
Id: id,
Data: newData,
Deleted: false, // unecessary, for clarity
}
// new item
if id == 0 {
var lastIdItem BDMeta
var newId int
err = bd.C(baoId).Find(
bson.M{"resource": resource},
).Sort("id").One(&lastIdItem)
if err != nil && err.Error() == "not found" {
newId = 1
} else if err != nil {
return
} else {
newId = lastIdItem.Id + 1
}
bdmeta.Id = newId
bdmeta.Data["id"] = strconv.Itoa(bdmeta.Id)
err = bd.C(baoId).Insert(bdmeta)
dataOut = []Data{bdmeta.Data}
return
} else {
var existingItem BDMeta
err = bd.C(baoId).Find(
bson.M{"resource": resource, "id": id, "deleted": false},
).One(&existingItem)
if err != nil {
return
}
for key, value := range newData {
existingItem.Data[key] = value
}
err = bd.C(baoId).Update(
bson.M{"_id": existingItem.Oid},
existingItem,
)
dataOut = []Data{existingItem.Data}
if err != nil {
return
}
}
return
}
func dbDelete(baoId, resource string, id int) (err error) {
var itemToDelete BDMeta
err = bd.C(baoId).Find(
bson.M{"resource": resource, "id": id},
).One(&itemToDelete)
if err != nil {
return
}
itemToDelete.Deleted = true
err = bd.C(baoId).Update(
bson.M{"_id": itemToDelete.Oid},
itemToDelete,
)
if err != nil {
return
}
return
}
type Data map[string]string
type BDMeta struct {
Oid bson.ObjectId `bson:"_id,omitempty"`
Resource string `bson:"resource,omitempty"`
Id int `bson:"id,omitempty"`
Deleted bool `bson:"deleted"`
Data Data `bson:"data,omitempty"`
}
type PathData struct {
ResourceName string
Id int
}
type BaoRequest struct {
Method string `json:"method"`
Secret string `json:"secret"`
BaoId string `json:"baoid"`
Path PathData `json:"path"`
Data Data `json:"data"`
}
type BaoResponse struct {
Message string `json:"message"`
Data []Data `json:"datas"`
Error string `json:"error"`
}