* Created a proper struct for the weather * Created methods to the weather struct to handle weather requests
374 lines
8.2 KiB
Go
374 lines
8.2 KiB
Go
package main
|
|
|
|
import (
|
|
"fmt"
|
|
"io"
|
|
"io/ioutil"
|
|
"log"
|
|
"net/http"
|
|
"os"
|
|
"strings"
|
|
|
|
flag "github.com/spf13/pflag"
|
|
)
|
|
|
|
// Create a list of constants to figure out
|
|
// the command line flags and translate them
|
|
// into uri flags.
|
|
const (
|
|
METRIC = 1 << iota
|
|
USCS
|
|
METERSECOND
|
|
ZERO
|
|
ONE
|
|
TWO
|
|
IGNOREUSERAGENT
|
|
FOLLOWLINK
|
|
NARROW
|
|
QUIET
|
|
SUPERQUIET
|
|
NOCOLORS
|
|
ADDFRAME
|
|
MIDTRANSPARENCY
|
|
TRANSPARENCY
|
|
LOCATION
|
|
LANGUAGE
|
|
PNG
|
|
VTWO
|
|
)
|
|
|
|
// Create a list of constants to define
|
|
// uri switches by flag.
|
|
const (
|
|
MetricSwitch = "m"
|
|
UscsSwitch = "u"
|
|
MeterSecondSwitch = "M"
|
|
ZeroSwitch = "0"
|
|
OneSwitch = "1"
|
|
TwoSwitch = "2"
|
|
IgnoreUserAgentSwitch = "A"
|
|
FollowLinkSwitch = "F"
|
|
NarrowSwitch = "n"
|
|
QuietSwitch = "q"
|
|
SuperQuietSwitch = "Q"
|
|
NoColorsSwitch = "T"
|
|
AddFrameSwitch = "p"
|
|
MidTransparencySwitch = "T"
|
|
)
|
|
|
|
// Define a command parameters struct.
|
|
// This will hold all the configurations
|
|
// set by the command line parameters provided.
|
|
type cmdParams struct {
|
|
Flags int
|
|
TransparencyLevel int
|
|
Location string
|
|
Language string
|
|
}
|
|
|
|
// Create a method to figure out the command parameters
|
|
// provided and translate them into uri parameters.
|
|
// This will figure out if we need to download the PNG image
|
|
// as well.
|
|
func (cmdP *cmdParams) generateParamFormat() (string, bool, error) {
|
|
var params []string
|
|
var prefix []string
|
|
var download bool
|
|
prefix = append(prefix, "?")
|
|
|
|
if cmdP.Flags&METRIC == METRIC {
|
|
params = append(params, MetricSwitch)
|
|
}
|
|
|
|
if cmdP.Flags&USCS == USCS {
|
|
params = append(params, UscsSwitch)
|
|
}
|
|
|
|
if cmdP.Flags&METERSECOND == METERSECOND {
|
|
params = append(params, MeterSecondSwitch)
|
|
}
|
|
|
|
if cmdP.Flags&ZERO == ZERO {
|
|
params = append(params, ZeroSwitch)
|
|
}
|
|
|
|
if cmdP.Flags&ONE == ONE {
|
|
params = append(params, OneSwitch)
|
|
}
|
|
|
|
if cmdP.Flags&TWO == TWO {
|
|
params = append(params, TwoSwitch)
|
|
}
|
|
|
|
if cmdP.Flags&IGNOREUSERAGENT == IGNOREUSERAGENT {
|
|
params = append(params, IgnoreUserAgentSwitch)
|
|
}
|
|
|
|
if cmdP.Flags&FOLLOWLINK == FOLLOWLINK {
|
|
params = append(params, FollowLinkSwitch)
|
|
}
|
|
|
|
if cmdP.Flags&NARROW == NARROW {
|
|
params = append(params, NarrowSwitch)
|
|
}
|
|
|
|
if cmdP.Flags&QUIET == QUIET {
|
|
params = append(params, QuietSwitch)
|
|
}
|
|
|
|
if cmdP.Flags&SUPERQUIET == SUPERQUIET {
|
|
params = append(params, SuperQuietSwitch)
|
|
}
|
|
|
|
if cmdP.Flags&NOCOLORS == NOCOLORS {
|
|
params = append(params, NoColorsSwitch)
|
|
}
|
|
|
|
if cmdP.Flags&ADDFRAME == ADDFRAME {
|
|
params = append(params, AddFrameSwitch)
|
|
}
|
|
|
|
if cmdP.Flags&MIDTRANSPARENCY == MIDTRANSPARENCY {
|
|
params = append(params, MidTransparencySwitch)
|
|
}
|
|
|
|
if cmdP.Flags&PNG == PNG {
|
|
prefix[0] = "_"
|
|
|
|
if cmdP.Flags&TRANSPARENCY == TRANSPARENCY && cmdP.TransparencyLevel >= 0 && cmdP.TransparencyLevel <= 100 {
|
|
params = append(params, strings.Join([]string{"_transparency=", string(cmdP.TransparencyLevel)}, ""))
|
|
}
|
|
|
|
params = append(params, ".png")
|
|
download = true
|
|
}
|
|
|
|
params = append(prefix, strings.Join(params, ""))
|
|
|
|
return strings.Join(params, ""), download, nil
|
|
}
|
|
|
|
// TODO:
|
|
// * Fix the description for help
|
|
//
|
|
// Create a function to parse all the command line parameters
|
|
// provided and save them in the parameter struct.
|
|
func flagParser(cmdP *cmdParams) {
|
|
metric := flag.Bool("metric", false, "Display weather in metric")
|
|
uscs := flag.Bool("uscs", false, "Display weather Imperial")
|
|
meterSecond := flag.Bool("meter-second", false, "Display wind in m/s")
|
|
zero := flag.Bool("zero", false, "Show the weather now")
|
|
one := flag.Bool("one", false, "Show the weather for one day")
|
|
two := flag.Bool("two", false, "Show the weather for two days")
|
|
ignoreUserAgent := flag.Bool("ignore-user-agent", false, "Request ignoring the user agent")
|
|
followLink := flag.Bool("follow-link", true, "Follow link redirect")
|
|
narrow := flag.Bool("narrow", false, "Display weather in narrow view")
|
|
quiet := flag.Bool("quiet", false, "Add the quiet flag")
|
|
superQuiet := flag.Bool("super-quiet", false, "Add the super quiet flag")
|
|
noColors := flag.Bool("no-colors", false, "Disable displaying colors (always enabled on windows)")
|
|
addFrame := flag.Bool("add-frame", false, "Add a frame to the output")
|
|
midTransparency := flag.Bool("mid-transparency", false, "Enable mid-transparency (PNG only)")
|
|
transparency := flag.Bool("transparency", false, "Enable transparency (PNG only)")
|
|
png := flag.Bool("png", false, "Download a weather PNG image")
|
|
v2 := flag.Bool("v2", false, "Use the v2 endpoint")
|
|
transparencyLevel := flag.Int("transparency-level", 0, "Set transparency level between 0 and 100 ")
|
|
location := flag.String("location", "", "Specify explicite location")
|
|
language := flag.String("language", "", "Speficy explicite language")
|
|
|
|
flag.Parse()
|
|
|
|
// Windows does not have color encoding
|
|
// so let's make sure windows users are happy
|
|
term := os.Getenv("TERM")
|
|
if term == "" {
|
|
*noColors = true
|
|
}
|
|
|
|
if *metric {
|
|
cmdP.Flags += METRIC
|
|
}
|
|
|
|
if *uscs {
|
|
cmdP.Flags += USCS
|
|
}
|
|
|
|
if *meterSecond {
|
|
cmdP.Flags += METERSECOND
|
|
}
|
|
|
|
if *zero {
|
|
cmdP.Flags += ZERO
|
|
}
|
|
|
|
if *one {
|
|
cmdP.Flags += ONE
|
|
}
|
|
|
|
if *two {
|
|
cmdP.Flags += TWO
|
|
}
|
|
|
|
if *ignoreUserAgent {
|
|
cmdP.Flags += IGNOREUSERAGENT
|
|
}
|
|
|
|
if *followLink {
|
|
cmdP.Flags += FOLLOWLINK
|
|
}
|
|
|
|
if *narrow {
|
|
cmdP.Flags += NARROW
|
|
}
|
|
|
|
if *quiet {
|
|
cmdP.Flags += QUIET
|
|
}
|
|
|
|
if *superQuiet {
|
|
cmdP.Flags += SUPERQUIET
|
|
}
|
|
|
|
if *noColors {
|
|
cmdP.Flags += NOCOLORS
|
|
}
|
|
|
|
if *addFrame {
|
|
cmdP.Flags += ADDFRAME
|
|
}
|
|
|
|
if *midTransparency {
|
|
cmdP.Flags += MIDTRANSPARENCY
|
|
}
|
|
|
|
if *transparency {
|
|
cmdP.Flags += TRANSPARENCY
|
|
cmdP.TransparencyLevel = *transparencyLevel
|
|
}
|
|
|
|
if *png {
|
|
cmdP.Flags += PNG
|
|
}
|
|
|
|
if *v2 {
|
|
cmdP.Flags += VTWO
|
|
}
|
|
|
|
if *location != "" {
|
|
cmdP.Flags += LOCATION
|
|
cmdP.Location = *location
|
|
}
|
|
|
|
if *language != "" {
|
|
cmdP.Flags += LANGUAGE
|
|
cmdP.Language = *language
|
|
}
|
|
|
|
}
|
|
|
|
// Create a function to generate the url that we'll be calling shortly.
|
|
func generateURL(domain string, v2 bool, location string, lang string, format string) ([]string, map[string]string) {
|
|
var link []string
|
|
var headers = make(map[string]string)
|
|
|
|
link = append(link, "https://")
|
|
|
|
if v2 {
|
|
link = append(link, "v2.")
|
|
}
|
|
|
|
link = append(link, domain, "/")
|
|
|
|
if location != "" {
|
|
link = append(link, location)
|
|
}
|
|
|
|
if format != "" {
|
|
link = append(link, format)
|
|
}
|
|
|
|
if lang != "" {
|
|
headers["Accept-Language"] = lang
|
|
}
|
|
|
|
return link, headers
|
|
}
|
|
|
|
type weather struct {
|
|
url string
|
|
}
|
|
|
|
func (w weather) newRequest(headers map[string]string) *http.Request {
|
|
req, err := http.NewRequest("GET", w.url, nil)
|
|
if err != nil {
|
|
log.Fatal("Error reading request. ", err)
|
|
}
|
|
return w.formatHeader(req, headers)
|
|
}
|
|
|
|
func (w weather) formatHeader(req *http.Request, headers map[string]string) *http.Request {
|
|
req.Header.Set("Content-Type", "text/plain; charset=utf-8")
|
|
// I had to read the wttr.in code to figure this one out.
|
|
// It wasn't Golang, it was 2 wasted hours that I won't be getting back.
|
|
req.Header.Set("User-Agent", "curl")
|
|
|
|
for key, value := range headers {
|
|
req.Header.Add(key, value)
|
|
}
|
|
return req
|
|
}
|
|
|
|
func (w weather) get(req *http.Request, download bool) {
|
|
client := &http.Client{}
|
|
client.Jar = nil
|
|
|
|
resp, err := client.Do(req)
|
|
if err != nil {
|
|
log.Fatal("Error reading response. ", err)
|
|
}
|
|
defer resp.Body.Close()
|
|
|
|
if download {
|
|
w.download(resp)
|
|
} else {
|
|
w.print(resp)
|
|
}
|
|
}
|
|
|
|
func (w weather) print(resp *http.Response) {
|
|
body, err := ioutil.ReadAll(resp.Body)
|
|
if err != nil {
|
|
log.Fatal("Error reading body. ", err)
|
|
}
|
|
fmt.Printf("%s\n", body)
|
|
}
|
|
|
|
func (w weather) download(resp *http.Response) {
|
|
splitURL := strings.Split(w.url, "/")
|
|
filename := splitURL[len(splitURL)-1]
|
|
|
|
f, err := os.Create(filename)
|
|
if err != nil {
|
|
return
|
|
}
|
|
defer f.Close()
|
|
|
|
_, err = io.Copy(f, resp.Body)
|
|
}
|
|
|
|
// Wraper function around the weather struct
|
|
func getWheather(url string, headers map[string]string, download bool) {
|
|
|
|
w := weather{url}
|
|
req := w.newRequest(headers)
|
|
w.get(req, download)
|
|
}
|
|
|
|
// This is the main function that glues everything together.
|
|
func main() {
|
|
var params cmdParams = cmdParams{}
|
|
var domain string = "wttr.in"
|
|
flagParser(¶ms)
|
|
format, download, _ := params.generateParamFormat()
|
|
link, headers := generateURL(domain, params.Flags&VTWO == VTWO, params.Location, params.Language, format)
|
|
getWheather(strings.Join(link, ""), headers, download)
|
|
}
|