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<div><div class="header">
<div class="headertitle"><div class="title">Attaching a File to a Message </div></div>
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<div class="textblock"><p >To attach a local file to an message, you can use <a class="el" href="namespacedpp_1_1utility.html#a4e85ceba20c4ed2bfda15d806890428b" title="Read a whole file into a std::string.">dpp::utility::read_file</a>. It's a helper function from D++ that allows you to read the file's content and sent it to discord.</p>
<p >An example of this:</p>
<div class="fragment"><div class="line"><span class="preprocessor">#include <dpp/dpp.h></span></div>
<div class="line"> </div>
<div class="line"><span class="keywordtype">int</span> main() {</div>
<div class="line"> <a class="code hl_class" href="classdpp_1_1cluster.html">dpp::cluster</a> bot(<span class="stringliteral">"token"</span>);</div>
<div class="line"> </div>
<div class="line"> bot.on_log(<a class="code hl_function" href="namespacedpp_1_1utility.html#a8c2cc04bb80ffd287b376d5977899277">dpp::utility::cout_logger</a>());</div>
<div class="line"> </div>
<div class="line"> <span class="comment">/* The event is fired when someone issues your commands */</span></div>
<div class="line"> bot.on_slashcommand([&bot](<span class="keyword">const</span> <a class="code hl_struct" href="structdpp_1_1slashcommand__t.html">dpp::slashcommand_t</a>& event) {</div>
<div class="line"> <span class="comment">/* Check which command they ran */</span></div>
<div class="line"> <span class="keywordflow">if</span> (event.<a class="code hl_variable" href="structdpp_1_1interaction__create__t.html#a8b0c69c156a1e532507a918c13414f14">command</a>.<a class="code hl_function" href="classdpp_1_1interaction.html#aabbb8d58d708128098516ed443d5c140">get_command_name</a>() == <span class="stringliteral">"file"</span>) {</div>
<div class="line"> dpp::message msg(event.command.channel_id, <span class="stringliteral">"Hey there, I've got a new file!"</span>);</div>
<div class="line"> </div>
<div class="line"> <span class="comment">/* attach the file to the message */</span></div>
<div class="line"> msg.add_file(<span class="stringliteral">"foobar.txt"</span>, dpp::utility::read_file(<span class="stringliteral">"path_to_your_file.txt"</span>));</div>
<div class="line"> </div>
<div class="line"> <span class="comment">/* Reply to the user with the message, with our file attached. */</span></div>
<div class="line"> event.reply(msg);</div>
<div class="line"> }</div>
<div class="line"> });</div>
<div class="line"> </div>
<div class="line"> bot.on_ready([&bot](<span class="keyword">const</span> <a class="code hl_struct" href="structdpp_1_1ready__t.html">dpp::ready_t</a>& event) {</div>
<div class="line"> <span class="keywordflow">if</span> (dpp::run_once<struct register_bot_commands>()) {</div>
<div class="line"> <span class="comment">/* Create and register a command when the bot is ready */</span></div>
<div class="line"> bot.global_command_create(<a class="code hl_class" href="classdpp_1_1slashcommand.html">dpp::slashcommand</a>(<span class="stringliteral">"file"</span>, <span class="stringliteral">"Send a message with a file attached!"</span>, bot.me.id));</div>
<div class="line"> }</div>
<div class="line"> });</div>
<div class="line"> </div>
<div class="line"> bot.start(<a class="code hl_enumvalue" href="namespacedpp.html#af447e04d0490cd4a9de085e4a758faa4a155f7db65696b4c09b5fcc41787e4726">dpp::st_wait</a>);</div>
<div class="line"> </div>
<div class="line"> <span class="keywordflow">return</span> 0;</div>
<div class="line">}</div>
<div class="ttc" id="aclassdpp_1_1cluster_html"><div class="ttname"><a href="classdpp_1_1cluster.html">dpp::cluster</a></div><div class="ttdoc">The cluster class represents a group of shards and a command queue for sending and receiving commands...</div><div class="ttdef"><b>Definition:</b> cluster.h:80</div></div>
<div class="ttc" id="aclassdpp_1_1interaction_html_aabbb8d58d708128098516ed443d5c140"><div class="ttname"><a href="classdpp_1_1interaction.html#aabbb8d58d708128098516ed443d5c140">dpp::interaction::get_command_name</a></div><div class="ttdeci">std::string get_command_name() const</div><div class="ttdoc">Get the command name for a command interaction.</div></div>
<div class="ttc" id="aclassdpp_1_1slashcommand_html"><div class="ttname"><a href="classdpp_1_1slashcommand.html">dpp::slashcommand</a></div><div class="ttdoc">Represents an application command, created by your bot either globally, or on a guild.</div><div class="ttdef"><b>Definition:</b> appcommand.h:1339</div></div>
<div class="ttc" id="anamespacedpp_1_1utility_html_a8c2cc04bb80ffd287b376d5977899277"><div class="ttname"><a href="namespacedpp_1_1utility.html#a8c2cc04bb80ffd287b376d5977899277">dpp::utility::cout_logger</a></div><div class="ttdeci">std::function< void(const dpp::log_t &)> DPP_EXPORT cout_logger()</div><div class="ttdoc">Get a default logger that outputs to std::cout. e.g.</div></div>
<div class="ttc" id="anamespacedpp_html_af447e04d0490cd4a9de085e4a758faa4a155f7db65696b4c09b5fcc41787e4726"><div class="ttname"><a href="namespacedpp.html#af447e04d0490cd4a9de085e4a758faa4a155f7db65696b4c09b5fcc41787e4726">dpp::st_wait</a></div><div class="ttdeci">@ st_wait</div><div class="ttdoc">Wait forever on a condition variable. The cluster will spawn threads for each shard and start() will ...</div><div class="ttdef"><b>Definition:</b> cluster.h:63</div></div>
<div class="ttc" id="astructdpp_1_1interaction__create__t_html_a8b0c69c156a1e532507a918c13414f14"><div class="ttname"><a href="structdpp_1_1interaction__create__t.html#a8b0c69c156a1e532507a918c13414f14">dpp::interaction_create_t::command</a></div><div class="ttdeci">interaction command</div><div class="ttdoc">command interaction</div><div class="ttdef"><b>Definition:</b> dispatcher.h:678</div></div>
<div class="ttc" id="astructdpp_1_1ready__t_html"><div class="ttname"><a href="structdpp_1_1ready__t.html">dpp::ready_t</a></div><div class="ttdoc">Session ready.</div><div class="ttdef"><b>Definition:</b> dispatcher.h:961</div></div>
<div class="ttc" id="astructdpp_1_1slashcommand__t_html"><div class="ttname"><a href="structdpp_1_1slashcommand__t.html">dpp::slashcommand_t</a></div><div class="ttdoc">User has issued a slash command.</div><div class="ttdef"><b>Definition:</b> dispatcher.h:695</div></div>
</div><!-- fragment --><p >Attachments via URL aren't possible. But there's a workaround for this! You can download the file and then attach it to the message.</p>
<p >Amazingly, D++ also has a function for this! You can use <a class="el" href="classdpp_1_1cluster.html#aa4ead3406c471a64fa1fa578cc51cf2e" title="Make a HTTP(S) request. For use when wanting asynchronous access to HTTP APIs outside of Discord.">dpp::cluster::request</a> to make HTTP requests, allowing you to go ahead and pull the content from a URL.</p>
<p >The following example program shows how to request a file and attach it to a message:</p>
<div class="fragment"><div class="line"><span class="preprocessor">#include <dpp/dpp.h></span></div>
<div class="line"> </div>
<div class="line"><span class="keywordtype">int</span> main() {</div>
<div class="line"> <a class="code hl_class" href="classdpp_1_1cluster.html">dpp::cluster</a> bot(<span class="stringliteral">"token"</span>);</div>
<div class="line"> </div>
<div class="line"> bot.on_log(<a class="code hl_function" href="namespacedpp_1_1utility.html#a8c2cc04bb80ffd287b376d5977899277">dpp::utility::cout_logger</a>());</div>
<div class="line"> </div>
<div class="line"> <span class="comment">/* The event is fired when someone issues your commands */</span></div>
<div class="line"> bot.on_slashcommand([&bot](<span class="keyword">const</span> <a class="code hl_struct" href="structdpp_1_1slashcommand__t.html">dpp::slashcommand_t</a>& event) {</div>
<div class="line"> <span class="comment">/* Check which command they ran */</span></div>
<div class="line"> <span class="keywordflow">if</span> (event.<a class="code hl_variable" href="structdpp_1_1interaction__create__t.html#a8b0c69c156a1e532507a918c13414f14">command</a>.<a class="code hl_function" href="classdpp_1_1interaction.html#aabbb8d58d708128098516ed443d5c140">get_command_name</a>() == <span class="stringliteral">"file"</span>) {</div>
<div class="line"> </div>
<div class="line"> <span class="comment">/* Request the image from the URL specified and capture the event in a lambda. */</span></div>
<div class="line"> bot.request(<span class="stringliteral">"https://dpp.dev/DPP-Logo.png"</span>, dpp::m_get, [event](const dpp::http_request_completion_t & httpRequestCompletion) {</div>
<div class="line"> </div>
<div class="line"> <span class="comment">/* Create a message */</span></div>
<div class="line"> dpp::message msg(event.command.channel_id, <span class="stringliteral">"This is my new attachment:"</span>);</div>
<div class="line"> </div>
<div class="line"> <span class="comment">/* Attach the image to the message, only on success (Code 200). */</span></div>
<div class="line"> if (httpRequestCompletion.status == 200) {</div>
<div class="line"> msg.add_file(<span class="stringliteral">"logo.png"</span>, httpRequestCompletion.body);</div>
<div class="line"> }</div>
<div class="line"> </div>
<div class="line"> <span class="comment">/* Send the message, with our attachment. */</span></div>
<div class="line"> event.reply(msg);</div>
<div class="line"> });</div>
<div class="line"> }</div>
<div class="line"> });</div>
<div class="line"> </div>
<div class="line"> bot.on_ready([&bot](<span class="keyword">const</span> <a class="code hl_struct" href="structdpp_1_1ready__t.html">dpp::ready_t</a>& event) {</div>
<div class="line"> <span class="keywordflow">if</span> (dpp::run_once<struct register_bot_commands>()) {</div>
<div class="line"> <span class="comment">/* Create and register a command when the bot is ready */</span></div>
<div class="line"> bot.global_command_create(<a class="code hl_class" href="classdpp_1_1slashcommand.html">dpp::slashcommand</a>(<span class="stringliteral">"file"</span>, <span class="stringliteral">"Send a message with an image attached from the internet!"</span>, bot.me.id));</div>
<div class="line"> }</div>
<div class="line"> });</div>
<div class="line"> </div>
<div class="line"> bot.start(<a class="code hl_enumvalue" href="namespacedpp.html#af447e04d0490cd4a9de085e4a758faa4a155f7db65696b4c09b5fcc41787e4726">dpp::st_wait</a>);</div>
<div class="line"> </div>
<div class="line"> <span class="keywordflow">return</span> 0;</div>
<div class="line">}</div>
</div><!-- fragment --><p >Here's another example of how to add a local image to an embed.</p>
<p >Upload the image in the same message as the embed and then reference it in the embed.</p>
<div class="fragment"><div class="line"><span class="preprocessor">#include <dpp/dpp.h></span></div>
<div class="line"> </div>
<div class="line"><span class="keywordtype">int</span> main() {</div>
<div class="line"> <a class="code hl_class" href="classdpp_1_1cluster.html">dpp::cluster</a> bot(<span class="stringliteral">"token"</span>);</div>
<div class="line"> </div>
<div class="line"> bot.on_log(<a class="code hl_function" href="namespacedpp_1_1utility.html#a8c2cc04bb80ffd287b376d5977899277">dpp::utility::cout_logger</a>());</div>
<div class="line"> </div>
<div class="line"> <span class="comment">/* The event is fired when someone issues your commands */</span></div>
<div class="line"> bot.on_slashcommand([&bot](<span class="keyword">const</span> <a class="code hl_struct" href="structdpp_1_1slashcommand__t.html">dpp::slashcommand_t</a>& event) {</div>
<div class="line"> <span class="comment">/* Check which command they ran */</span></div>
<div class="line"> <span class="keywordflow">if</span> (event.<a class="code hl_variable" href="structdpp_1_1interaction__create__t.html#a8b0c69c156a1e532507a918c13414f14">command</a>.<a class="code hl_function" href="classdpp_1_1interaction.html#aabbb8d58d708128098516ed443d5c140">get_command_name</a>() == <span class="stringliteral">"file"</span>) {</div>
<div class="line"> <span class="comment">/* Create a message. */</span></div>
<div class="line"> dpp::message msg(event.command.channel_id, <span class="stringliteral">""</span>);</div>
<div class="line"> </div>
<div class="line"> <span class="comment">/* Attach the image to the message we just created. */</span></div>
<div class="line"> msg.add_file(<span class="stringliteral">"image.jpg"</span>, dpp::utility::read_file(<span class="stringliteral">"path_to_your_image.jpg"</span>));</div>
<div class="line"> </div>
<div class="line"> <span class="comment">/* Create an embed. */</span></div>
<div class="line"> dpp::embed embed;</div>
<div class="line"> embed.set_image(<span class="stringliteral">"attachment://image.jpg"</span>); <span class="comment">/* Set the image of the embed to the attached image. */</span></div>
<div class="line"> </div>
<div class="line"> <span class="comment">/* Add the embed to the message. */</span></div>
<div class="line"> msg.add_embed(embed);</div>
<div class="line"> </div>
<div class="line"> event.reply(msg);</div>
<div class="line"> }</div>
<div class="line"> });</div>
<div class="line"> </div>
<div class="line"> bot.on_ready([&bot](<span class="keyword">const</span> <a class="code hl_struct" href="structdpp_1_1ready__t.html">dpp::ready_t</a>& event) {</div>
<div class="line"> <span class="keywordflow">if</span> (dpp::run_once<struct register_bot_commands>()) {</div>
<div class="line"> <span class="comment">/* Create and register a command when the bot is ready */</span></div>
<div class="line"> bot.global_command_create(<a class="code hl_class" href="classdpp_1_1slashcommand.html">dpp::slashcommand</a>(<span class="stringliteral">"file"</span>, <span class="stringliteral">"Send a local image along with an embed with the image!"</span>, bot.me.id));</div>
<div class="line"> }</div>
<div class="line"> });</div>
<div class="line"> </div>
<div class="line"> bot.start(<a class="code hl_enumvalue" href="namespacedpp.html#af447e04d0490cd4a9de085e4a758faa4a155f7db65696b4c09b5fcc41787e4726">dpp::st_wait</a>);</div>
<div class="line"> </div>
<div class="line"> <span class="keywordflow">return</span> 0;</div>
<div class="line">}</div>
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