Blog=日記: 8月 2012

はじめに

Google APIs を使うコマンドラインを書いてみました。自分のイベントとか見たい方は適当に改良してください。:-)

** かぶりネタですが興味のある方は読んでください。**

Usage

USAGE
      gapicalendarlist.sh  v2|v3

RESET SETTINGS
      remove 'v2.gapi.token' or 'v3.gapi.token'

DEPENDENCIES
      lynx, curl

解説のようなメモのような

簡単に認証と処理内容を書いてみました

認証の種類

Version 2 : using ClientLogin

OAuth
AuthSub
ClientLogin

Version 3 : using OAuth -> Devices

知識の足りなさ等の諸事情で Devices の方法を選択してます。

Installed Applicatoins の方式で、https://accounts.google.com/o/oauth2/auth にリクエストするとHTMLコンテンツがかえって来ます。これはシェルであれこれするのが面倒だったのでやめました。
Devices方式で、https://accounts.google.com/o/oauth2/device/code にリクエストをすると、JSONがかえってpiar毎に改行されているのでシェルで扱いやすいのでこちらを選択しました

OAuth
- Login
- Web Server Applications
- Client-size Applications
- Installled Applications (Winwdows, iOS, Android, Blackberry)
- Devices
- Service Accounts

処理内容

*** Google のサイトを見た方がいいと思ったので割愛します。 ***

 [ shell ]                  [ google ]
    |                            |
    |                            |
    +----- get user token -----> +  URL 1 
    |                            |
    | <------ user token --------+
    |     and other params       |
    |          JSON              |
    |                            |
    +----+                       |
    |    | save token            |
    |<---+                       |
    |         [ lynx ]           |
    |            |               |
    +-- verify ->|               |
    |    URL     +-- Sign in --> |
    |            |               |
    |            |<- user code --+
    |            |     form      |
    |            |               |
    |            +- user code -->|
    |            |               |
    |            |<- allow acces-+
    |            |  confirm page |
    |            |               |
    |            +-allow submit->|
    |            |               |
    |            |<- result page-+
    |            |               |
    |                            |
    |                            |
    |                            |
    |                            |
    +------ get access token --->+ URL 2 
    |                            |
    | <------ access token ------+
    |       and other params     |
    |           JSON             |
    |                            |
    +----+                       |
    |    | save token            |
    |<---+                       |
    |                            |
    |                            |
    +----- get calendar list --->+  URL 3
    |                            |
    | <----- calendar list ------+
    |         JSON               |
    |                            |
    |                            |


URL 1 https://accounts.google.com/o/oauth2/device/code
URL 2 https://accounts.google.com/o/oauth2/token
URL 3 https://www.googleapis.com/calendar/v3/users/me/calendarList

Reference Link

Google OAuth 2.0

Google APIs Calendar

Source & Screen cast

	#!/bin/bash


	# ------------ parameters ------------

	api_version=$1

	# if need set, please remove these files.
	token_file="v2.gapi.token"
	user_code_file="v3.gapi.token"

	# *************************************
	# account : need setting
	# *************************************
	# ClientLogin
	username=yourmail@address.net
	password=xxxx
	# oauth 2.0
	client_id=your.account.clientId
	client_secret=


	# ------------ functions ------------

	#
	# Version 2
	#
	function V2ClientLoginAndCalendarList {

	# [company-id]-[app-name]-[app-version]
	applicationName="mycompany-googleapi.sh-v1"
	# cl (Calendar) / mail (Gmail) / blogger (Blogger)
	serviceName="cl"
	# GOOGLE / HOSTED / HOSTED_OR_GOOGLE
	accountType="HOSTED_OR_GOOGLE"

	#
	# login , get token
	#
	if [ -e ${token_file} ]; then
	TOKEN=`cat ${token_file}`
	else
	URL="https://www.google.com/accounts/ClientLogin"
	parameters="Email=${username}&Passwd=${password}&source=${applicationName}&service=${serviceName}&accountType=${accountType}"
	TOKEN=`curl -s -d "${parameters}" -k ${URL} -H "GData-Version: 2" \| awk '{if (/Auth/) {print $0;}}' \| sed 's/=/ /' \| awk '{print $2}'`
	echo ${TOKEN} > ${token_file}
	# for interval
	sleep 5
	fi

	# get calendar list
	URL="https://www.google.com/calendar/feeds/default/owncalendars/full"
	curl -s -H "GData-Version: 2" -H "Authorization: GoogleLogin auth=${TOKEN}" -k ${URL}

	}

	#
	# Version 3
	#
	function V3OAuthAndCalendarList {

	# for lynx
	#LANG=en
	#export LANG


	scope="https://www.googleapis.com/auth/userinfo.email https://www.googleapis.com/auth/userinfo.profile https://www.googleapis.com/auth/calendar https://www.googleapis.com/auth/calendar.readonly"
	#scope="https://www.googleapis.com/auth/calendar https://www.googleapis.com/auth/calendar.readonly"

	#
	# obtain user code
	#
	if [ ! -e ${user_code_file} ]; then
	URL="https://accounts.google.com/o/oauth2/device/code"
	parameters="scope=${scope}&client_id=${client_id}"
	curl -s -k ${URL} -d "${parameters}" \| sed 's/"/ /g' \| awk '{ if (NF > 3) {printf("%s=%s\n", $1, $3);}}' > ${user_code_file}
	fi
	source ${user_code_file}

	#
	# allow api using and obtain access token
	#
	if [ "${access_token}" = "" ]; then

	echo "******* COPY **********"
	echo "user_code: ${user_code}"
	echo "******* COPY **********"

	sleep 8
	lynx "${verification_url}"

	URL="https://accounts.google.com/o/oauth2/token"
	parameters="client_id=${client_id}&client_secret=${client_secret}&code=${device_code}&grant_type=http://oauth.net/grant_type/device/1.0"
	curl -s -H "GData-Version: 3" -k ${URL} -d "${parameters}" \| sed 's/"/ /g' \| awk '{ if (NF > 3) {printf("%s=%s\n", $1, $3);}}' >> ${user_code_file}
	source ${user_code_file}
	fi

	#
	# get calendar
	#
	URL=https://www.googleapis.com/calendar/v3/users/me/calendarList
	curl -s -k ${URL} -H "Authorization: Bearer ${access_token}"

	}


	function UsageMessage {
	echo "USAGE"
	echo " gapicalendarlist.sh v2\|v3"
	echo ""
	echo "RESET SETTINGS"
	echo " remove '${token_file}' or '${user_code_file}'"
	echo ""
	echo "DEPENDENCIES"
	echo " lynx, curl"
	echo ""
	}

	# ------------ logic ------------

	if [ "${client_id}" = "your.account.clientId" -o "${username}" = "yourmail@address.net" ]; then
	echo "**********************************"
	echo "PLEASE SETUP ACCOUNT PARAMETERS"
	echo "**********************************"
	echo ""
	echo "v2 => uesername , password"
	echo "v3 => client_id , client_secret"
	echo ""
	echo "**********************************"
	UsageMessage
	elif [ "${api_version}" = "v3" ]; then
	V3OAuthAndCalendarList
	elif [ "${api_version}" = "v2" ]; then
	V2ClientLoginAndCalendarList
	else
	UsageMessage
	fi

view raw gapicalendarlist.sh hosted with ❤ by GitHub

ttyplay

Blog=日記

2012年8月10日金曜日

Google APIs Calnedar & OAuth2.0 (v3/v2)