/
server.go
311 lines (274 loc) · 9.94 KB
/
server.go
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package main
import (
"bytes"
"encoding/json"
"fmt"
"io/ioutil"
"log"
"net/http"
"strings"
"time"
"gopkg.in/mgo.v2"
"gopkg.in/mgo.v2/bson"
"github.com/drone/routes"
)
type locationStruct struct {
Address string `json:"address"`
City string `json:"city"`
Coordinate struct {
Lat float64 `json:"lat"`
Lng float64 `json:"lng"`
} `json:"coordinate"`
ID bson.ObjectId `json:"id" bson:"_id,omitempty"`
Name string `json:"name"`
State string `json:"state"`
Zip string `json:"zip"`
}
type GoogleLocationStruct struct {
Results []struct {
AddressComponents []struct {
LongName string `json:"long_name"`
ShortName string `json:"short_name"`
Types []string `json:"types"`
} `json:"address_components"`
FormattedAddress string `json:"formatted_address"`
Geometry struct {
Location struct {
Lat float64 `json:"lat"`
Lng float64 `json:"lng"`
} `json:"location"`
LocationType string `json:"location_type"`
Viewport struct {
Northeast struct {
Lat float64 `json:"lat"`
Lng float64 `json:"lng"`
} `json:"northeast"`
Southwest struct {
Lat float64 `json:"lat"`
Lng float64 `json:"lng"`
} `json:"southwest"`
} `json:"viewport"`
} `json:"geometry"`
PartialMatch bool `json:"partial_match"`
PlaceID string `json:"place_id"`
Types []string `json:"types"`
} `json:"results"`
Status string `json:"status"`
}
func addLocation(w http.ResponseWriter, r *http.Request) {
decoder := json.NewDecoder(r.Body)
var t locationStruct
err := decoder.Decode(&t)
if err != nil {
panic("Some error in decoding the JSON")
}
//TODO Hit Google's API and retrieve the co-ordinates, then save this struct to a MongoDB instance and retrieve the auto-generated ID.
requestUrl := strings.Join([]string{t.Address, t.City, t.State, t.Zip}, "+")
requestUrl = strings.Replace(requestUrl, " ", "%20", -1)
var buffer bytes.Buffer
buffer.WriteString("http://maps.google.com/maps/api/geocode/json?address=")
buffer.WriteString(requestUrl)
buffer.WriteString("&sensor=false")
url := buffer.String()
fmt.Println("Url is ", url)
res, err := http.Get(url)
if err != nil {
//w.WriteHeader(http.StatusBadRequest)
w.Write([]byte(`{ "error": "Unable to parse data from Google. Error at res, err := http.Get(url) -- line 75"}`))
panic(err.Error())
}
body, err := ioutil.ReadAll(res.Body)
if err != nil {
//w.WriteHeader(http.StatusBadRequest)
w.Write([]byte(`{ "error": "Unable to parse data from Google. body, err := ioutil.ReadAll(res.Body) -- line 84"}`))
panic(err.Error())
}
var googleLocation GoogleLocationStruct
err = json.Unmarshal(body, &googleLocation)
if err != nil {
//w.WriteHeader(http.StatusBadRequest)
w.Write([]byte(`{ "error": "Unable to unmarshal Google data. body, err = json.Unmarshal(body, &googleLocation) -- line 94"}`))
panic(err.Error())
}
//TODO Prepare a response which will return the ID and the details of the JSON in JSON format.
t.Coordinate.Lat = googleLocation.Results[0].Geometry.Location.Lat
t.Coordinate.Lng = googleLocation.Results[0].Geometry.Location.Lng
t.ID = bson.NewObjectId()
//TODO Set the ID as the auto generated ID from MongoDB
maxWait := time.Duration(20 * time.Second)
session, err := mgo.DialWithTimeout("mongodb://savioferns321:mongodb123@ds041633.mongolab.com:41633/savio_mongo", maxWait)
if err != nil {
fmt.Println("Unable to connect to MongoDB")
panic(err)
}
defer session.Close()
// Optional. Switch the session to a monotonic behavior.
session.SetMode(mgo.Monotonic, true)
c := session.DB("savio_mongo").C("addresses")
err = c.Insert(bson.M{"_id": t.ID, "name": t.Name, "address": t.Address, "city": t.City, "state": t.State, "zip": t.Zip, "coordinate": bson.M{"lat": t.Coordinate.Lat, "lng": t.Coordinate.Lng}})
if err != nil {
fmt.Println("Error at line 124 ---- c := session.DB(tripplannerdb).C(addresses)")
log.Fatal(err)
}
//TODO Store the output JSON into MongoDB with the ID as its key
w.WriteHeader(http.StatusCreated)
w.Header().Set("Content-Type", "application/json")
outputJson, err := json.Marshal(t)
if err != nil {
//w.WriteHeader(http.StatusBadRequest)
w.Write([]byte(`{ "error": "Unable to marshal response. body, outputJson, err := json.Marshal(t) -- line 110"}`))
panic(err.Error())
}
w.Write(outputJson)
}
func findLocation(w http.ResponseWriter, r *http.Request) {
locationId := r.URL.Query().Get(":locationId")
fmt.Println("Location ID is : ", locationId)
maxWait := time.Duration(20 * time.Second)
session, err := mgo.DialWithTimeout("mongodb://savioferns321:mongodb123@ds041633.mongolab.com:41633/savio_mongo", maxWait)
if err != nil {
fmt.Println("Unable to connect to MongoDB")
panic(err)
}
defer session.Close()
// Optional. Switch the session to a monotonic behavior.
session.SetMode(mgo.Monotonic, true)
var result locationStruct
c := session.DB("savio_mongo").C("addresses")
err = c.Find(bson.M{"_id": bson.ObjectIdHex(locationId)}).One(&result)
if err != nil {
fmt.Println("err = c.Find(bson.M{\"id\": bson.M{\"$oid\": t}}).One(&result)")
log.Fatal(err)
}
//Returning the result to user
w.WriteHeader(http.StatusOK)
w.Header().Set("Content-Type", "application/json")
outputJson, err := json.Marshal(result)
if err != nil {
//w.WriteHeader(http.StatusBadRequest)
w.Write([]byte(`{ "error": "Unable to marshal response. body, outputJson, err := json.Marshal(t) -- line 110"}`))
panic(err.Error())
}
w.Write(outputJson)
}
func updateLocation(w http.ResponseWriter, r *http.Request) {
locationId := r.URL.Query().Get(":locationId")
fmt.Println("Received location ID ", locationId)
decoder := json.NewDecoder(r.Body)
var t locationStruct
err := decoder.Decode(&t)
if err != nil {
panic("Some error in decoding the JSON")
}
t.ID = bson.ObjectIdHex(locationId)
//If location values are not null then update the co-ordinates from Google API
var requestUrl bytes.Buffer
if len(t.Address) > 0 {
requestUrl.WriteString(t.Address + "+")
}
if len(t.City) > 0 {
requestUrl.WriteString(t.City + "+")
}
if len(t.State) > 0 {
requestUrl.WriteString(t.State + "+")
}
if len(t.Zip) > 0 {
requestUrl.WriteString(t.Zip)
}
if requestUrl.Len() > 0 {
//The Location needs to be changed via Google API
requestStr := strings.Replace(requestUrl.String(), " ", "%20", -1)
var buffer bytes.Buffer
buffer.WriteString("http://maps.google.com/maps/api/geocode/json?address=")
buffer.WriteString(requestStr)
buffer.WriteString("&sensor=false")
url := buffer.String()
fmt.Println("Url is ", url)
res, err := http.Get(url)
if err != nil {
//w.WriteHeader(http.StatusBadRequest)
w.Write([]byte(`{ "error": "Unable to parse data from Google. Error at res, err := http.Get(url) -- line 75"}`))
panic(err.Error())
}
body, err := ioutil.ReadAll(res.Body)
if err != nil {
//w.WriteHeader(http.StatusBadRequest)
w.Write([]byte(`{ "error": "Unable to parse data from Google. body, err := ioutil.ReadAll(res.Body) -- line 84"}`))
panic(err.Error())
}
var googleLocation GoogleLocationStruct
err = json.Unmarshal(body, &googleLocation)
if err != nil {
//w.WriteHeader(http.StatusBadRequest)
w.Write([]byte(`{ "error": "Unable to unmarshal Google data. body, err = json.Unmarshal(body, &googleLocation) -- line 94"}`))
panic(err.Error())
}
//TODO Prepare a response which will return the ID and the details of the JSON in JSON format.
t.Coordinate.Lat = googleLocation.Results[0].Geometry.Location.Lat
t.Coordinate.Lng = googleLocation.Results[0].Geometry.Location.Lng
}
//Perform the update
maxWait := time.Duration(20 * time.Second)
session, err := mgo.DialWithTimeout("mongodb://savioferns321:mongodb123@ds041633.mongolab.com:41633/savio_mongo", maxWait)
if err != nil {
fmt.Println("Unable to connect to MongoDB")
panic(err)
}
defer session.Close()
// Optional. Switch the session to a monotonic behavior.
session.SetMode(mgo.Monotonic, true)
c := session.DB("savio_mongo").C("addresses")
err = c.Update(bson.M{"_id": bson.ObjectIdHex(locationId)}, t)
if err != nil {
fmt.Println(" Line 248 : err = c.Update(bson.M{id: bson.M{$oid: locationId}}, t)")
log.Fatal(err)
}
//Prepare and write the response
w.WriteHeader(http.StatusCreated)
w.Header().Set("Content-Type", "application/json")
outputJson, err := json.Marshal(t)
if err != nil {
//w.WriteHeader(http.StatusBadRequest)
w.Write([]byte(`{ "error": "Unable to marshal response. body, outputJson, err := json.Marshal(t) -- line 110"}`))
panic(err.Error())
}
w.Write(outputJson)
fmt.Println("Update done successfully!")
}
func deleteLocation(w http.ResponseWriter, r *http.Request) {
locationId := r.URL.Query().Get(":locationId")
fmt.Println("Location ID is : ", locationId)
maxWait := time.Duration(20 * time.Second)
session, err := mgo.DialWithTimeout("mongodb://savioferns321:mongodb123@ds041633.mongolab.com:41633/savio_mongo", maxWait)
if err != nil {
fmt.Println("Unable to connect to MongoDB")
panic(err)
}
defer session.Close()
// Optional. Switch the session to a monotonic behavior.
session.SetMode(mgo.Monotonic, true)
c := session.DB("savio_mongo").C("addresses")
err = c.Remove(bson.M{"_id": bson.ObjectIdHex(locationId)})
if err != nil {
fmt.Println("err = c.Find(bson.M{\"id\": bson.M{\"$oid\": t}}).One(&result)")
log.Fatal(err)
}
//Returning the result to user
w.WriteHeader(http.StatusOK)
w.Header().Set("Content-Type", "application/json")
if err != nil {
//w.WriteHeader(http.StatusBadRequest)
w.Write([]byte(`{ "error": "Unable to marshal response. body, outputJson, err := json.Marshal(t) -- line 110"}`))
panic(err.Error())
}
w.Write([]byte(`{"result": "Delete operation done successfully."}`))
}
func main() {
mux := routes.New()
mux.Post("/locations/", addLocation)
mux.Get("/locations/:locationId", findLocation)
mux.Put("/locations/:locationId", updateLocation)
mux.Del("/locations/:locationId", deleteLocation)
http.Handle("/", mux)
http.ListenAndServe(":8088", nil)
}