go sources first

Author: dchaykin

go.mod

@@ -0,0 +1,10 @@
+module github.com/setlog/go-mongo-atlas
+
+go 1.13
+
+require (
+	github.com/niemeyer/pretty v0.0.0-20200227124842-a10e7caefd8e // indirect
+	gopkg.in/check.v1 v1.0.0-20200227125254-8fa46927fb4f // indirect
+	gopkg.in/mgo.v2 v2.0.0-20190816093944-a6b53ec6cb22
+	gopkg.in/yaml.v2 v2.3.0 // indirect
+)

main.go

@@ -0,0 +1,76 @@
+package main
+
+import (
+	"crypto/tls"
+	"io/ioutil"
+	"net"
+	"net/http"
+
+	mgo "gopkg.in/mgo.v2"
+	"gopkg.in/mgo.v2/bson"
+)
+
+var mongoConn *mgo.Session
+
+type MyEntity struct {
+	Data []byte `json:"data" bson:"data"`
+}
+
+func main() {
+	var err error
+	mongoConn, err = createConnection()
+	if err != nil {
+		panic(err)
+	}
+
+	http.HandleFunc("/save", post)
+	http.HandleFunc("/read", get)
+
+	if err := http.ListenAndServe(":8080", nil); err != nil {
+		panic(err)
+	}
+}
+
+func createConnection() (*mgo.Session, error) {
+	dialInfo := mgo.DialInfo{
+		Addrs:    []string{"abc-shard-00-00.gcp.mongodb.net:27017", "abc-shard-00-01.gcp.mongodb.net:27017", "abc-shard-00-02.gcp.mongodb.net:27017"},
+		Username: "MongoUser",
+		Password: "YourVerySecurePassword",
+	}
+	tlsConfig := &tls.Config{}
+	dialInfo.DialServer = func(addr *mgo.ServerAddr) (net.Conn, error) {
+		conn, err := tls.Dial("tcp", addr.String(), tlsConfig)
+		return conn, err
+	}
+	return mgo.DialWithInfo(&dialInfo)
+}
+
+func post(w http.ResponseWriter, req *http.Request) {
+	payload, err := ioutil.ReadAll(req.Body)
+	if err != nil {
+		panic(err)
+	}
+
+	session := mongoConn.Copy()
+	defer session.Close()
+
+	entity := MyEntity{Data: payload}
+	err = session.DB("test").C("data").Insert(entity)
+	if err != nil {
+		panic(err)
+	}
+}
+
+func get(w http.ResponseWriter, req *http.Request) {
+	session := mongoConn.Copy()
+	defer session.Close()
+
+	entity := MyEntity{}
+	err := session.DB("test").C("data").Find(bson.M{}).One(&entity)
+	if err != nil {
+		panic(err)
+	}
+
+	w.Write(entity.Data)
+	w.Write([]byte{10})
+}