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Use the HTTP Client Plugin to Send Emails.md

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Use the HTTP Client Plugin to Send Emails

DolphinDB supports dynamic loading of external plugins written in C++ to enable additional script functions, thus extending system functionality.

This tutorial introduces how to use sendEmail in the HTTP Client plugin to send plain text emails.

Steps:

  1. Load the HTTP Client plugin in DolphinDB
  2. Send the emails

1. Load the HTTP Client Plugin in DolphinDB

Linux

  1. Download the plugin files libPluginHttpClient.so and PluginHttpClient.txt.

Find the files in the DolphinDBPlugin project under /httpClient/bin/linux64/. Make sure to switch to the branch that is consistent with your server version before downloading.

  1. Place libPluginHttpClient.so and PluginHttpClient.txt in the same directory. Execute the following script to load the plugin:
loadPlugin("<PluginDir>/httpClient/bin/linux64/PluginHttpClient.txt");

2. Send Email

The function sendEmail supports sending email to a one or multiple recipients.

2.1 Prerequisites

  • To send email using the HTTP Client plugin, enable the SMTP service on your mail account.
  • Use the following function to configure the host and port of your mail account.

httpClient::emailSmtpConfig

emailName="example.com";
host="smtp.qq.com";
port=25;
httpClient::emailSmtpConfig(emailName,host,port);

2.2 httpClient::sendEmail(user,psw,recipient,subject,text)

where

  • user is the mail address you use to send the email.
  • If an SMTP password is provided, specify psw as the SMTP password. Otherwise, it is the password to your mailbox.
  • recipient indicates the mail address(es) to send the mail to. See examples below.
  • subject and text are the subject and body of the mail.

Example 1. Send mail to one recipient

  • recipient is a string indicating the mail address of the recipient.
user='mailFrom@dolphindb.com';
psw='xxxxx';
recipient='mailTo@example.com';

Execute sendEmail:

res=httpClient::sendEmail(user,psw,recipient,'This is a subject','This is a text')
assert  res[`responseCode]==250;

Return a dictionary “res“. If the email is sent successfully, res['responseCode']==250 is returned.

Example 2. Send to multiple recipients

  • recipient is a vector of strings indicating the email addresses of the recipients.
user='mailFrom@dolphindb.com';
psw='xxxxx';
recipientCollection='mailToRecipient1@example.com''mailToRecipient2@example.com''mailToRecipient3@example.com';

Execute sendEmail:

res=httpClient::sendEmail(user,psw,recipientCollection,'This is a subject','This is a text');
assert res[`responseCode]==250;

Return a dictionary “res“. If the email is sent successfully, res['responseCode']==250 is returned.