Re: Access gmail with pycurl.

From: Hongyi Zhao via curl-library <curl-library_at_cool.haxx.se>
Date: Fri, 2 Jul 2021 13:04:17 +0800

On Fri, Jul 2, 2021 at 12:16 PM Ray Satiro via curl-library
<curl-library_at_cool.haxx.se> wrote:
>
> On 6/29/2021 12:33 AM, Hongyi Zhao via curl-library wrote:
>
> On Tue, Jun 29, 2021 at 5:55 AM Daniel Stenberg <daniel_at_haxx.se> wrote:
>
> On Sat, 26 Jun 2021, Hongyi Zhao via curl-library wrote:
>
> I noticed that libcurl, hence pycurl supports IMAP and IMAPS, so I want to
> know if I can use it to retrieve/remove emails from my Gmail account?
>
> Yes you can.
>
> Jay once wrote ShowGmailFolders.c for example:
>
> https://gist.github.com/jay/a43724c98220de85d020
>
> Thank you for this wonderful code snippet. But for quick testing, I
> try the following command based on the notes at
> <http://cweiske.de/tagebuch/curl-imap-noauth.htm>, but failed:
>
> $ curl -x socks5h://127.0.0.1:18888 -v -k --ssl
> imaps://imap.gmail.com:993 --user "username:passwd"
> * Trying 127.0.0.1:18888...
> * TCP_NODELAY set
> * SOCKS5 communication to imap.gmail.com:993
> * SOCKS5 connect to imap.gmail.com:993 (remotely resolved)
> * SOCKS5 request granted.
> * Connected to 127.0.0.1 (127.0.0.1) port 18888 (#0)
> * successfully set certificate verify locations:
> * CAfile: /etc/ssl/certs/ca-certificates.crt
> CApath: /etc/ssl/certs
> * TLSv1.3 (OUT), TLS handshake, Client hello (1):
> * OpenSSL SSL_connect: SSL_ERROR_SYSCALL in connection to imap.gmail.com:993
> * Closing connection 0
> curl: (35) OpenSSL SSL_connect: SSL_ERROR_SYSCALL in connection to
> imap.gmail.com:993
>
>
> syscall error is probably your proxy.

Exactly, you're right. The problem is caused by the socks5 proxy
supplied by HAProxy on local side doesn't enable the sticky-session
option. I use another socks5 proxy exposed from HAProxy with the
sticky-session option, and it does the trick:

$ curl -x socks5h://127.0.0.1:18889 --ssl imaps://imap.gmail.com:993
--user "hongyi.zhao:passwd"
* LIST (\HasNoChildren) "/" "INBOX"
* LIST (\HasNoChildren) "/" "Junk"
* LIST (\HasChildren \Noselect) "/" "[Gmail]"
* LIST (\All \HasNoChildren) "/" "[Gmail]/All Mail"
* LIST (\Drafts \HasNoChildren) "/" "[Gmail]/Drafts"
* LIST (\HasNoChildren \Important) "/" "[Gmail]/Important"
* LIST (\HasNoChildren \Sent) "/" "[Gmail]/Sent Mail"
* LIST (\HasNoChildren \Junk) "/" "[Gmail]/Spam"
* LIST (\Flagged \HasNoChildren) "/" "[Gmail]/Starred"
* LIST (\HasNoChildren \Trash) "/" "[Gmail]/Trash"
* LIST (\HasNoChildren) "/" "&XeVPXJCuTvY-"
* LIST (\HasNoChildren) "/" "&ZTZjbg-"
* LIST (\HasNoChildren) "/" "&ZcWITHb4UXM-"
* LIST (\HasNoChildren) "/" "&ecFOupCuTvY-"


> I can connect fine. Note you will have to enable "less secure app access" [1] on your google account to use the gmail username/password.

Yes, I've enabled this for doing the above testing.


> There is a way to do it with oauth2 instead. I don't think I've ever had to do that though and I don't think we have an example for it.
>
>
> [1]: https://myaccount.google.com/lesssecureapps
>
>
>
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Regards

-- 
Assoc. Prof. Hongyi Zhao <hongyi.zhao_at_gmail.com>
Theory and Simulation of Materials
Hebei Vocational University of Technology and Engineering
NO. 552 North Gangtie Road, Xingtai, China
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Received on 2021-07-02