/
KeyFetch.go
87 lines (75 loc) · 1.98 KB
/
KeyFetch.go
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package yougoclient
/*
* Consists of code from youtubes data api and oauth samples.
* https://developers.google.com/youtube/v3/code_samples/go
*
* :)
*
*/
import (
"context"
"encoding/json"
"fmt"
"log"
"net/http"
"net/url"
"os"
"os/user"
"path/filepath"
"golang.org/x/oauth2"
)
func CreateClient(ctx context.Context, config *oauth2.Config) *http.Client {
TokenFile, err := TokenCacheFile()
if err != nil {
log.Fatalf("Unable to get path to cached credential file. %v", err)
}
token, err := GetTokenFromFile(TokenFile)
if err != nil {
token = GetTokenFromWeb(config)
SaveToken(TokenFile, token)
}
return config.Client(ctx, token)
}
func TokenCacheFile() (string, error) {
usr, err := user.Current()
if err != nil {
return "", err
}
tokenCacheDir := filepath.Join(usr.HomeDir, ".credentials")
os.MkdirAll(tokenCacheDir, 0700)
return filepath.Join(tokenCacheDir,
url.QueryEscape("youtube-go-quickstart.json")), err
}
func GetTokenFromFile(filename string) (*oauth2.Token, error) {
f, err := os.Open(filename)
if err != nil {
return nil, err
}
t := &oauth2.Token{}
err = json.NewDecoder(f).Decode(t)
defer f.Close()
return t, err
}
func GetTokenFromWeb(config *oauth2.Config) *oauth2.Token {
authURL := config.AuthCodeURL("state-token", oauth2.AccessTypeOffline)
fmt.Printf("Go to the following link in your browser then type the "+
"authorization code: \n%v\n", authURL)
var code string
if _, err := fmt.Scan(&code); err != nil {
log.Fatalf("Unable to read authorization code %v", err)
}
retrievedToken, err := config.Exchange(oauth2.NoContext, code)
if err != nil {
log.Fatalf("Unable to retrieve token from web %v", err)
}
return retrievedToken
}
func SaveToken(filename string, token *oauth2.Token) {
fmt.Printf("Saving credential file to: %s\n", filename)
f, err := os.OpenFile(filename, os.O_RDWR|os.O_CREATE|os.O_TRUNC, 0600)
if err != nil {
log.Fatalf("Unable to cache oauth token: %v", err)
}
defer f.Close()
json.NewEncoder(f).Encode(token)
}