From e1b6122f0f58f5f074f44df210daadae38a43fa2 Mon Sep 17 00:00:00 2001 From: Abhisek Dwivedi Date: Wed, 13 Nov 2019 10:39:27 +0530 Subject: [PATCH] Added Readme.md and refactored code --- Readme.md | 34 +++++++++++ go.mod | 10 ++++ go.sum | 140 +++++++++++++++++++++++++++++++++++++++++++++ main.go | 94 ++++++++++++++++++++++++++++++ requests.http | 11 ++++ run.sh | 6 ++ weather/current.go | 69 ++++++++++++++++++++++ weather/models.go | 56 ++++++++++++++++++ 8 files changed, 420 insertions(+) create mode 100644 Readme.md create mode 100644 go.mod create mode 100644 go.sum create mode 100644 main.go create mode 100644 requests.http create mode 100755 run.sh create mode 100644 weather/current.go create mode 100644 weather/models.go diff --git a/Readme.md b/Readme.md new file mode 100644 index 0000000..786abae --- /dev/null +++ b/Readme.md @@ -0,0 +1,34 @@ +This is a Weather Information System that give weather information about few famous cities of India. + +Pre-requisites: +1. Golang 1.12 +2. GORM `go get -u github.com/jinzhu/gorm` + +3. API token for `http://api.openweathermap.org` + +Steps to run: +1. Signup on `http://api.openweathermap.org`, get the API token and set the environment variable `APIKEY` + +`export APIKEY=` +2. Simply run `run.sh` script. After that system is ready to handle requests. + +Description: +1. This application runs as a local http sever at 8080 port and continously gathers data in the background from `http://api.openweathermap.org` in goroutines. +2. It saves data in `mysql` container running on the localhost and the container port `3306` is mapped to port `3306`of localhost. +3. Weather information for a particular city can be queried in 3 ways + + a. with `city name` + + b. with `latitute` and `longitude` + + c. with `zip-code` + + So the applicatin exposes 3 endpoints for the user: + + a. http://localhost:8080/weather/?city=`cityname` + + b. http://localhost:8080/weather/?lat=`latitude`&lon=`longitude` + + c. http://localhost:8080/weather/?zip=`zip-code` + +Note: There is a `.http` file in this project to make sample API calls to sever \ No newline at end of file diff --git a/go.mod b/go.mod new file mode 100644 index 0000000..208ce16 --- /dev/null +++ b/go.mod @@ -0,0 +1,10 @@ +module github.com/abhishekdwivedi3060/weather-information-system + +go 1.12 + +require ( + github.com/go-sql-driver/mysql v1.4.1 + github.com/gorilla/mux v1.7.3 + github.com/jinzhu/gorm v1.9.11 + google.golang.org/appengine v1.6.5 // indirect +) diff --git a/go.sum b/go.sum new file mode 100644 index 0000000..22add78 --- /dev/null +++ b/go.sum @@ -0,0 +1,140 @@ +cloud.google.com/go 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v0.0.0-20190102054323-c2f93a96b099/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4= +honnef.co/go/tools v0.0.0-20190106161140-3f1c8253044a/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4= diff --git a/main.go b/main.go new file mode 100644 index 0000000..7640b56 --- /dev/null +++ b/main.go @@ -0,0 +1,94 @@ +package main + +import ( + "encoding/json" + "fmt" + "log" + "net/http" + "os" + "time" + + weat "github.com/abhishekdwivedi3060/weather-information-system/weather" + _ "github.com/go-sql-driver/mysql" + "github.com/gorilla/mux" + "github.com/jinzhu/gorm" + _ "github.com/jinzhu/gorm/dialects/mysql" +) + +var apiKey string +var db *gorm.DB + +func init() { + var err error + apiKey = os.Getenv("APIKEY") + for { + db, err = gorm.Open("mysql", "root:root@tcp(127.0.0.1:3306)/weather?charset=utf8&parseTime=True") + if err == nil { + log.Print("Successfully connected to database") + break + } else { + time.Sleep(5 * time.Second) + log.Print("Waiting to connect to databse") + } + } +} + +func main() { + defer db.Close() + db.AutoMigrate(&weat.RequiredData{}) + city := map[string]int{"Delhi": 110001, "Mumbai": 400004, "Jaipur": 302001, "Noida": 201203, "Bhopal": 462001, "Gandhinagar": 382002, "Pune": 411007, "Nasik": 422101, "Kochi": 682001, + "Agra": 282001, "Ajmer": 305001, "Alibag": 402201, "Aligarh": 202001, "Allahabad": 211001, "Alwar": 683101, "Amaravati": 444601, "Ambala": 133003, "Amritsar": 143001, "Assam": 793011, "Aurangabad": 431001, + "Bangalore": 560002, "Baramulla": 193101, "Belgaum": 590001, "Bhagalpur": 812001, "Bhuvaneswar": 751001, "Borivali": 400901, "KolKata": 700001, "Chandigarh": 160017, "Chittorgarh": 312001, "Coimbatore": 641001, + "Darjeeling": 734101, "dholpur": 328001, "Durgapur": 314001, "Gangtok": 737101, "Gaya": 823001, "Ghaziabad": 201001, "Guwahati": 781001, "Gwalior": 474001, "Howrah": 711101, "Indore": 452001, "Itanagar": 791111, + "Kanpur": 208001, "Kolhapur": 416003, "Kota": 324001, "Lucknow": 226003, "Ludhiana": 141001, "Meerut": 250001, "Mysore": 570001, "Nagpur": 341001, "Panvel": 410206, "Patna": 800001, "Port Blair": 744101, "Rajkot": 360001, + "Satara": 415001, "Shimla": 171001, "Surat": 395003, "Thane": 400601, "Udaipur": 313001} + go func(map[string]int) { + w, err := weat.NewCurrent(apiKey) + if err != nil { + log.Fatalln(err) + } + for { + for key, val := range city { + data, _ := w.CurrentByName(key) + data.Zipcode = val + var d weat.RequiredData + db.Where(" name = ?", key).Delete(&d) + db.Create(&data) + } + time.Sleep(1 * time.Minute) + } + + }(city) + + mux := mux.NewRouter() + mux.HandleFunc("/weather/", getCityWeatherByName).Methods("GET").Queries("city", "{city}") + mux.HandleFunc("/weather/", getCityWEatherByLocation).Methods("GET").Queries("lat", "{lat}", "lon", "{lon}") + mux.HandleFunc("/weather/", getCityWeaherByZip).Methods("GET").Queries("zip", "{zip}") + + fmt.Printf("Running local server on 8080") + if err := http.ListenAndServe(":8080", mux); err != nil { + panic(err) + } +} + +func getCityWeaherByZip(w http.ResponseWriter, r *http.Request) { + zip := r.URL.Query()["zip"] + var reqObj weat.RequiredData + db.Where(" zipcode = ?", zip).Find(&reqObj) + json.NewEncoder(w).Encode(reqObj) +} + +func getCityWEatherByLocation(w http.ResponseWriter, r *http.Request) { + lon := r.URL.Query()["lon"] + lat := r.URL.Query()["lat"] + var reqObj weat.RequiredData + db.Where(" latitude = ? AND longitude =?", lat, lon).Find(&reqObj) + json.NewEncoder(w).Encode(reqObj) +} + +func getCityWeatherByName(w http.ResponseWriter, r *http.Request) { + params := r.FormValue("city") + var reqObj weat.RequiredData + db.Where(" name = ?", params).Find(&reqObj) + json.NewEncoder(w).Encode(reqObj) +} diff --git a/requests.http b/requests.http new file mode 100644 index 0000000..0fe6f4e --- /dev/null +++ b/requests.http @@ -0,0 +1,11 @@ +GET http://localhost:8080/weather/?city=Delhi + +### + +GET http://localhost:8080/weather/?lat=18.52&lon=73.85 + +### +GET http://localhost:8080/weather/?zip=422101 + +### + diff --git a/run.sh b/run.sh new file mode 100755 index 0000000..4e0014d --- /dev/null +++ b/run.sh @@ -0,0 +1,6 @@ +#!/usr/bin/env bash + +docker run --rm -d -p 3306:3306 --env-file .env mysql +echo "Waiting for Dabase conatainer to be ready" +sleep 30 +GO111MODULE=on go run main.go \ No newline at end of file diff --git a/weather/current.go b/weather/current.go new file mode 100644 index 0000000..70de2f7 --- /dev/null +++ b/weather/current.go @@ -0,0 +1,69 @@ +package weather + +import ( + "encoding/json" + "fmt" +) + +type CurrentWeatherData struct { + Coord Coordinates `json:"coord"` + Weather []Weather `json:"weather"` + Base string `json:"base"` + Main Main `json:"main"` + Visibility int `json:"visibility"` + Wind Wind `json:"wind"` + Clouds Clouds `json:"clouds"` + Dt int `json:"dt"` + Sys Sys `json:"sys"` + Timezone int `json:"timezone"` + ID int `json:"id"` + Name string `json:"name"` + Cod int `json:"cod"` + Key string + *Settings +} + +type RequiredData struct { + Name string + Zipcode int + Longitude float64 `json:"lon"` + Latitude float64 `json:"lat"` + Visibility int + Temperature float64 + Pressure float64 + Humidity int + Country string +} + +func NewCurrent(key string ) (*CurrentWeatherData, error) { + c := &CurrentWeatherData{ + Settings: NewSettings(), + } + c.Key = key + return c, nil +} + +func (w *CurrentWeatherData) CurrentByName(location string) (RequiredData, error) { + url := fmt.Sprintf(fmt.Sprintf(baseURL, "appid=%s&q=%s"), w.Key, location) + response, err := w.client.Get(url) + if err != nil { + return RequiredData{}, err + } + defer response.Body.Close() + var currentObj CurrentWeatherData + if err := json.NewDecoder(response.Body).Decode(¤tObj); err != nil { + return RequiredData{}, err + } + data := RequiredData{ + Name: currentObj.Name, + Zipcode: 0, + Longitude: currentObj.Coord.Longitude, + Latitude: currentObj.Coord.Latitude, + Visibility: currentObj.Visibility, + Temperature: currentObj.Main.Temp, + Pressure: currentObj.Main.Pressure, + Humidity: currentObj.Main.Humidity, + Country: currentObj.Sys.Country, + } + return data, nil +} diff --git a/weather/models.go b/weather/models.go new file mode 100644 index 0000000..34083d1 --- /dev/null +++ b/weather/models.go @@ -0,0 +1,56 @@ +package weather + +import "net/http" + +var ( + baseURL = "http://api.openweathermap.org/data/2.5/weather?%s" +) + +type Coordinates struct { + Longitude float64 `json:"lon"` + Latitude float64 `json:"lat"` +} + +type Sys struct { + Type int `json:"type"` + ID int `json:"id"` + Message float64 `json:"message"` + Country string `json:"country"` + Sunrise int `json:"sunrise"` + Sunset int `json:"sunset"` +} + +type Wind struct { + Speed float64 `json:"speed"` + Deg float64 `json:"deg"` +} + +type Weather struct { + ID int `json:"id"` + Main string `json:"main"` + Description string `json:"description"` + Icon string `json:"icon"` +} + +type Main struct { + Temp float64 `json:"temp"` + TempMin float64 `json:"temp_min"` + TempMax float64 `json:"temp_max"` + Pressure float64 `json:"pressure"` + SeaLevel float64 `json:"sea_level"` + GrndLevel float64 `json:"grnd_level"` + Humidity int `json:"humidity"` +} + +type Clouds struct { + All int `json:"all"` +} +type Settings struct { + client *http.Client +} + +func NewSettings() *Settings { + return &Settings{ + client: http.DefaultClient, + } +}