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\page attach-file Attaching a file to a message
Attached files must be locally stored.
To attach a file to a message, you can upload a local image.
D++ has this helper function to read a file: dpp::utility::read_file
.
An example program:
@note Because these examples utilizes message content, they require the message content privileged intent.
#include <dpp/dpp.h>
int main() {
dpp::cluster bot("token", dpp::i_default_intents | dpp::i_message_content);
bot.on_log(dpp::utility::cout_logger());
/* Message handler to look for a command called !file */
bot.on_message_create([&bot](const dpp::message_create_t &event) {
if (event.msg.content == "!file") {
// create a message
dpp::message msg(event.msg.channel_id, "Hey there, i've got a new file!");
// attach the file to the message
msg.add_file("foobar.txt", dpp::utility::read_file("path_to_your_file.txt"));
// send the message
bot.message_create(msg);
}
});
bot.start(dpp::st_wait);
return 0;
}
Attachments via an url aren't possible. But there's a workaround for. You can download the file and then attach it to the message.
To make requests, D++ also has a helper function: dpp::cluster::request
.
The following example program shows how to request a file and attach it to a message.
#include <dpp/dpp.h>
int main() {
dpp::cluster bot("token", dpp::i_default_intents | dpp::i_message_content);
bot.on_log(dpp::utility::cout_logger());
/* Message handler to look for a command called !file */
bot.on_message_create([&bot](const dpp::message_create_t &event) {
if (event.msg.content == "!file") {
// request an image
bot.request("https://dpp.dev/DPP-Logo.png", dpp::m_get, [&bot, channel_id = event.msg.channel_id](const dpp::http_request_completion_t & httpRequestCompletion) {
// create a message
dpp::message msg(channel_id, "This is my new attachment:");
// attach the image on success
if (httpRequestCompletion.status == 200) {
msg.add_file("logo.png", httpRequestCompletion.body);
}
// send the message
bot.message_create(msg);
});
}
});
bot.start(dpp::st_wait);
return 0;
}
Here's another example of how to add a local image to an embed.
Upload the image in the same message as the embed and then reference it in the embed.
#include <dpp/dpp.h>
int main() {
dpp::cluster bot("token", dpp::i_default_intents | dpp::i_message_content);
bot.on_log(dpp::utility::cout_logger());
/* Message handler to look for a command called !file */
bot.on_message_create([&bot](const dpp::message_create_t &event) {
if (event.msg.content == "!file") {
// create a message
dpp::message msg(event.msg.channel_id, "");
// attach the image to the message
msg.add_file("image.jpg", dpp::utility::read_file("path_to_your_image.jpg"));
dpp::embed embed;
embed.set_image("attachment://image.jpg"); // reference to the attached file
msg.add_embed(embed);
// send the message
bot.message_create(msg);
}
});
bot.start(dpp::st_wait);
return 0;
}