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fleet_api.go
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/
fleet_api.go
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package app
import (
"encoding/json"
"io"
"io/ioutil"
"net/http"
"github.com/boltdb/bolt"
"github.com/gorilla/mux"
"github.com/mfellner/comodoro/rest"
)
var bucketName = []byte("units")
// CreateUnit creates a new fleet unit.
func CreateUnit(app *App) http.Handler {
return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
var unit FleetUnit
body, err := ioutil.ReadAll(io.LimitReader(r.Body, 1048576))
if err != nil {
panic(err)
}
if err := r.Body.Close(); err != nil {
panic(err)
}
if err := json.Unmarshal(body, &unit); err != nil {
rest.BadRequest(w, err.Error())
return
}
app.DB().Update(func(tx *bolt.Tx) error {
b := tx.Bucket(bucketName)
v := b.Get([]byte(unit.Name))
if v != nil {
rest.DuplicateError(w)
return err
}
jsonString, err := json.Marshal(unit.Body)
if err != nil {
rest.BadRequest(w, err.Error())
return err
}
if err := b.Put([]byte(unit.Name), []byte(jsonString)); err != nil {
rest.ServerError(w, err.Error())
} else {
rest.Created(w, unit)
}
return err
})
})
}
// GetUnits returns a collection of all fleet units.
func GetUnits(app *App) http.Handler {
return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
units := FleetUnits{}
app.DB().View(func(tx *bolt.Tx) error {
b := tx.Bucket(bucketName)
b.ForEach(func(k, v []byte) error {
var body map[string]interface{}
if err := json.Unmarshal(v, &body); err != nil {
rest.ServerError(w, err.Error())
}
units = append(units, FleetUnit{Name: string(k), Body: body})
return nil
})
return nil
})
rest.JSON(w, units)
})
}
// GetUnit returns a single fleet unit for the given name.
func GetUnit(app *App) http.Handler {
return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
vars := mux.Vars(r)
name := vars["name"]
app.DB().View(func(tx *bolt.Tx) error {
b := tx.Bucket(bucketName)
v := b.Get([]byte(name))
if v == nil {
rest.NotFound(w)
return nil
}
if body, err := unmarshal(v); err != nil {
rest.ServerError(w, err.Error())
} else {
rest.JSON(w, FleetUnit{Name: name, Body: body})
}
return nil
})
})
}
// DeleteUnit deletes the fleet unit with the given name.
func DeleteUnit(app *App) http.Handler {
return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
vars := mux.Vars(r)
name := vars["name"]
app.DB().Update(func(tx *bolt.Tx) error {
b := tx.Bucket(bucketName)
v := b.Get([]byte(name))
if v == nil {
rest.NotFound(w)
return nil
}
if err := b.Delete([]byte(name)); err != nil {
rest.ServerError(w, err.Error())
return err
}
rest.Deleted(w)
return nil
})
})
}
// GetInfo returns some status information.
func GetInfo(app *App) http.Handler {
return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
if info, err := app.fleetClient.ListMachines(); err != nil {
rest.ServerError(w, err.Error())
} else {
rest.JSON(w, info)
}
})
}
func unmarshal(v []byte) (map[string]interface{}, error) {
var body map[string]interface{}
err := json.Unmarshal(v, &body)
return body, err
}