Using GAE Cron to send mails daily

[許吉宏]

Hi There,

 Has anyone ever used GAE Cron to send mails daily ? I used GAE Mail API (CreateAuthorizedService('gmail', 'v1') ) to send a mail by Cron daily.

Unfortunately , I never got one but Corn logs said it was successfully. 

I tested copied all codes to normal .py file and executed it , it worked perfecly and I could get the mail . 

Does anyone know where is wrong with GAE Cron ? Thank you .

Regards,

Aoyii

[Vinny P]

On Sun, Aug 10, 2014 at 10:27 PM, 許吉宏 <2pytho...@gmail.com> wrote:

 Has anyone ever used GAE Cron to send mails daily ? I used GAE Mail API (CreateAuthorizedService('gmail', 'v1') ) to send a mail by Cron daily.

Unfortunately , I never got one but Corn logs said it was successfully.  

Does anyone know where is wrong with GAE Cron ?

 

 

You should be able to send emails via cron-initiated requests. Did you check the application logs (under logging) and the cron success status (under the Cron tab) for errors?

 

 

On Sun, Aug 10, 2014 at 10:27 PM, 許吉宏 <2pytho...@gmail.com> wrote:

I used GAE Mail API (CreateAuthorizedService('gmail', 'v1') )

 

 

Are you using the App Engine built-in mail API ( https://developers.google.com/appengine/docs/python/mail/ ) or the Gmail API ( https://developers.google.com/gmail/api/auth/web-server#send_authorized_requests_and_check_for_revoked_credentials ) ?

 

-----------------

-Vinny P

Technology & Media Consultant

Chicago, IL

App Engine Code Samples: http://www.learntogoogleit.com

 

[許吉宏]

Hi Vinny,

   Yes , I'm using Gmail API and it works if I executes it manually . Moreover , on the Cron tab , it says running the job successfully . 

But on the application logs I got the information below . Any suggestion to solve it ? Thank you .

"This request caused a new process to be started for your application, and thus caused your application code to be loaded for the first time. This request may thus take longer and use more CPU than a typical request for your application" 

BR,

Aoyii

Vinny P於 2014年8月12日星期二UTC+8上午1時44分46秒寫道：

[PK]

I am not sure what your problem is but I send e-mails initiated by cron requests all the time. 

PK

http://www.gae123.com

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[Alejandro Gonzalez]

"This request caused a new process to be started for your application, and thus caused your application code to be loaded for the first time. This request may thus take longer and use more CPU than a typical request for your application" 

This is the log for a loading request: https://developers.google.com/appengine/kb/java#What_Is_A_Loading_Request

Loading request should be executed normally, but they take more time to execute becouse GAE needs to start an instance to execute it, it the request plus the start process is less than 60sec. If its exceeds the 60 secs you should see a DeadlineExeededException

You can try a couple of things:

1 - Start a cron to make a request that rise the instance 1 min before launching the mail cron, so when the mail cron is executed the instance is up.

2 - Use a backend or Module (https://developers.google.com/appengine/docs/java/modules/?hl=es) to handle the mail cron

3 - If you don't need Gmail API try using the more simple Appengine built in mail API ( https://developers.google.com/appengine/docs/python/mail/)

cheers!

Alejandro González Rodrigo

www.nextinit.com

alejandro...@nextinit.com
+34  666 57 79 13

--

[Vinny P]

On Mon, Aug 11, 2014 at 8:57 PM, 許吉宏 <2pytho...@gmail.com> wrote:

  I'm using Gmail API and it works if I executes it manually

Instead of using the Gmail API to send email, can you temporarily try using the built-in mail function to send mail? https://developers.google.com/appengine/docs/python/mail/ 

You can also try emailing using SendGrid: https://developers.google.com/appengine/docs/python/mail/sendgrid#send_an_email

On Mon, Aug 11, 2014 at 8:57 PM, 許吉宏 <2pytho...@gmail.com> wrote:

But on the application logs I got the information below . Any suggestion to solve it ? Thank you .

"This request caused a new process to be started for your application, and thus caused your application code to be loaded for the first time. This request may thus take longer and use more CPU than a typical request for your application" 

That's OK, that message is normal. Do you see any error signs in the log (non-200 status code, a red icon next to a request log, etc)?

 

[許吉宏]

Hi Vinny P,

  Followed your suggestion , I used built-in mail function to send mail by cron successfully. Do you know why is the reason I can't use Gmail API through Cron?

Any GAE limitation or where is wrong ? Thank you very much .

BR,

Aoyii

Vinny P於 2014年8月12日星期二UTC+8下午8時12分13秒寫道：

[許吉宏]

Hi Alejandro Gonzale,

  Followed your suggestion , I used built-in mail function to send mail by cron successfully. Do you know why is the reason I can't use Gmail API through Cron?

Any GAE limitation or where is wrong ? Thank you very much .

BR,

Aoyii

Alejandro Gonzalez於 2014年8月12日星期二UTC+8下午3時24分12秒寫道：

[許吉宏]

Hello,

  Anyone can tell me why I can't use Gmail API to send mail by Cron ? Or where I have to do something specifically  ? Thank you .

BR,

Aoyii

許吉宏於 2014年8月11日星期一UTC+8上午11時27分36秒寫道：

[Vinny P]

On Wed, Aug 27, 2014 at 12:29 AM, 許吉宏 <2pytho...@gmail.com> wrote:

Hi Vinny P,

  Followed your suggestion , I used built-in mail function to send mail by cron successfully. Do you know why is the reason I can't use Gmail API through Cron? Any GAE limitation or where is wrong ? Thank you very much .

That's the thing: there isn't any GAE limitation. You should be able to use the Gmail API from cron requests just like any other Google API service.

What I would try is this: try accessing any other Google API from a cron request and see if it succeeds. For example, try using the URL Shortener API ( https://developers.google.com/url-shortener/v1/getting_started#shorten ) and see if any problems pop up. Also, try using your cron request to spawn off a task queue request, delay the task by 30 seconds by using the countdown argument, and running your Gmail code within the task queue request.