Keep getting empty response when adding place via google place API - post

Question

I'm trying to add a place within app scope via google place API. For this I'm using golang. But I keep on getting no result, there is no error message.
Here is my code
```
type latlng struct {
lat, lng float64
}
type newPlace struct {
location latlng
accuracy int
name string
phone_number string
address string
types string
}
func main() {
requestUrl := "https://maps.googleapis.com/maps/api/place/add/json?key=<MYAPIKEY>"
obj := newPlace{
location: latlng{
lat: 52.1502824,
lng: 38.2643063,
},
name: "some field",
types: "storage",
}
bodyBytes, err := json.Marshal(&obj)
if err != nil {
panic(err)
}
body := bytes.NewReader(bodyBytes)
rsp, err := http.NewRequest("POST", requestUrl, body)
if err != nil {
log.Fatal(err)
}
defer rsp.Body.Close()
body_byte, err := ioutil.ReadAll(rsp.Body)
if err != nil {
panic(err)
}
fmt.Println(string(body_byte))
}
```
Here is the documentation that I followed. https://developers.google.com/places/web-service/add-place
I'm a bit new to golang, any help would be much appreciated.

Answer 1

FYI I wrote this article on this touchy topic (JSON data encoded into a POST body request in Go).
You're missing 4 things here:
the http.Client creation. Then you need to execute the request you're preparing with http.NewRequest by using client.Do.
add json fields to your struct and export variables contained in struct by capitalizing variables's first letters
set Content-Type to application/json
Google is expecting an array instead of a string in types, so I replace with an array containing 1 string (but you should adapt this depending on how many types you want to pass to Google)
Here is a working script:
type latlng struct {
Lat float64 `json:"lat"`
Lng float64 `json:"lng"`
}
type newPlace struct {
Location latlng `json:"location"`
Accuracy int `json:"accuracy"`
Name string `json:"name"`
PhoneNumber string `json:"phone_number"`
Address string `json:"address"`
Types [1]string `json:"types"`
}
func main() {
requestUrl := "https://maps.googleapis.com/maps/api/place/add/json?key=<your key>"
types := [1]string{"storage"}
obj := newPlace{
Location: latlng{
Lat: 52.1502824,
Lng: 38.2643063,
},
Name: "some field",
Types: types,
}
bodyBytes, err := json.Marshal(&obj)
if err != nil {
fmt.Println(err)
}
body := bytes.NewReader(bodyBytes)
client := &http.Client{}
req, err := http.NewRequest("POST", requestUrl, body)
req.Header.Add("Content-Type", "application/json")
if err != nil {
fmt.Println(err)
}
rsp, err := client.Do(req)
defer rsp.Body.Close()
body_byte, err := ioutil.ReadAll(rsp.Body)
if err != nil {
fmt.Println(err)
}
fmt.Println(string(body_byte))
}
Hope it's working now !

Answer 2

You're trying to marshall objects to JSON which have no exported fields, so the resulting JSON document is empty. Per the JSON documentation, it will only marshall exported fields (those whose names begin with a capital letter). Try:
type latlng struct {
Lat float64 `json:"lat"`
Lng float64 `json:"lng"`
}
type newPlace struct {
Location latlng `json:"location"`
Accuracy int `json:"accuracy"`
Name string `json:"name"`
PhoneNumber string `json:"phone_number"`
Address string `json:"address"`
Types string `json:"types"`
}