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ΦʔϓϯιʔεϥΠϒϥϦݚڀձ #3 Jan / 22 / 2016 Yoshiki Nakagawa eureka, Inc.

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AboutMe @yyoshiki41 Yoshiki Nakagawa Infrastructure Engineer, pairs Division Tech • Golang • Middleware, RDBMS • AWS

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Google APIs Client Library for Go GitHub : https://github.com/google/google-api-go-client/ Enable to access google APIs - Gmail API - BigQuery API - Calendar API etc...

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yyoshiki41/go-gmail-drafts GitHub : https://github.com/yyoshiki41/go-gmail-drafts Create a new draft using the Gmail API.

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Why not Google Apps Script ? Apps Script is not enough... Can't create drafts. (only get drafts) So use Google APIs Client Library ! Other languages libraries : https://developers.google.com/discovery/libraries All Libraries are open-sourced !

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Preparation ̍. Google Developer Console ͔Βɺ৽نϓϩδΣΫτΛ࡞੒ ͢Δɻ ̎. ϓϩδΣΫτͷ Gmail API Λ༗ޮʹ͢Δɻ

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̏. ೝূ৘ใΛઃఆ͢Δɻ ̐. ඞཁͳೝূ৘ใΛΫϦοΫɻ

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̑. OAuth ΫϥΠΞϯτͷઃఆɻ OAuthೝূΛ׬ྃͤ͞ɺJSONϑΝΠϧΛμ΢ϯϩʔυ͠·͢ɻ ޙͰ࢖͍·͢ʂ

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How to ̍. go get $ go get github.com/yyoshiki41/go-gmail-drafts $ cd $GOPATH/src/github.com/yyoshiki41/go-gmail-drafts ̎. μ΢ϯϩʔυͨ͠jsonϑΝΠϧΛઃஔɻ $ mv ~/Downloads/clientid.json config/clientsecret.json

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̏. ॳճ࣮ߦ࣌͸OAuth௨͠ɺΞΫηετʔΫϯΛऔಘ͢Δɻ $ go run savetoken/main.go ϒϥ΢β͕ࣗಈͰ։͖ɺgoogleΞΧ΢ϯτͷೝূΛ͠·͢ɻ ࣍ʹɺGmailͰͷΞΫγϣϯΛڐՄ͠·͢ɻ

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̑ɽςΩετϘοΫεʹදࣔ͞ΕͨcodeΛίϐʔ͢Δɻ λʔϛφϧʹ໭ͬͯɺtokenϑΝΠϧΛੜ੒ɻ ίϐʔͨ͠ίʔυΛషΓ෇͚Δɻ

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̑. Լॻ͖ςϯϓϨΛ࡞੒ɻ { "to": "xxx@gmail.com", "subject": "Daily Reports", "message": "Hello!\nThis is a draft." }

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̒. go runͰ࣮ߦɻ $ go run main.go

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ऴΘΓʹ go buildͰόΠφϦԽͯ͠ɺ cron౳ʹొ࿥͢Ε͹ຖ೔Լॻ͖࡞੒౳ʹ࢖͑·͢ʂ