Rust
Outlook Send Email with Attachments

This example sends a plain-text email with attachments. Other examples exist for:
Sending plain-text email.
Sending HTML email.
Sending HTML email with embedded images.
Sending HTML email with embedded images and attachments.
Chilkat Rust Downloads

Rust

// Important: This example requires Chilkat v9.5.0.68 or greater.

// This example requires the Chilkat API to have been previously unlocked.
// See Global Unlock Sample for sample code.

let http = chilkat::Http::new();

// Use your previously obtained access token here:
// See the following examples for getting an access token:
//    Get Microsoft Graph OAuth2 Access Token (Azure AD v2.0 Endpoint).
//    Get Microsoft Graph OAuth2 Access Token (Azure AD Endpoint).
//    Refresh Access Token (Azure AD v2.0 Endpoint).
//    Refresh Access Token (Azure AD Endpoint).

http.set_auth_token("MICROSOFT_GRAPH_ACCESS_TOKEN");

// To send mail, we'll POST to the following endpoint:
// 
// POST /users/{id | userPrincipalName}/sendMail
// 
// (The special keyword "me" may be used in place of a principal name.)
// 

// Load the files to be attached.
let attach1 = chilkat::BinData::new();
let _ = attach1.load_file("qa_data/pdf/fishing.pdf");
let attach2 = chilkat::BinData::new();
let _ = attach2.load_file("qa_data/msword/sample.docx");

// The body of the POST request contains JSON that specifies the email subject, body,
// recipients, etc.  This example will build the following JSON plain-text email:
// 

// 	{
// 	  "message": {
// 	    "subject": "Sample Email with Attachments",
// 	    "body": {
// 	      "contentType": "Text",
// 	      "content": "This is the plain-text body..."
// 	    },
// 	    "toRecipients": [
// 	      {
// 	        "emailAddress": {
// 		  "name": "Chilkat Software",
// 	          "address": "admin@chilkat.io"
// 	        }
// 	      },
// 	      {
// 	        "emailAddress": {
// 	          "address": "chilkat.support@gmail.com"
// 	        }
// 	      }
// 	    ],
// 	    "ccRecipients": [
// 	      {
// 	        "emailAddress": {
// 		  "name": "Chilkat Blog",
// 		  "address": "admin@cknotes.com"
// 	        }
// 	      }
// 	    ],
// 	    "attachments": [
// 	       {
// 	         "@odata.type": "#microsoft.graph.fileAttachment",
// 	         "name": "fishing.pdf",
// 	         "contentType": "application/pdf",
// 	         "size": <theActualSize>,
// 	         "isInline": false,
// 	         "contentBytes": "base64_data_here"
// 	       },
// 	       {
// 	         "@odata.type": "#microsoft.graph.fileAttachment",
// 	         "name": "sample.docx",
// 	         "contentType": "application/vnd.openxmlformats-officedocument.wordprocessingml.document",
// 	         "size": <theActualSize>,
// 	         "isInline": false,
// 	         "contentBytes": "base64_data_here"
// 	       }
// 	    ]
// 	  },
// 	  "saveToSentItems": true
// 	}
// 
// Build the above JSON.
let json = chilkat::JsonObject::new();
let _ = json.update_string("message.subject", "Sample Email with Attachments");
let _ = json.update_string("message.body.contentType", "Text");
let _ = json.update_string("message.body.content", "This is the plain-text body...");

let _ = json.update_string("message.toRecipients[0].emailAddress.name", "Chilkat Software");
let _ = json.update_string("message.toRecipients[0].emailAddress.address", "admin@chilkat.io");
let _ = json.update_string("message.toRecipients[1].emailAddress.address", "chilkat.support@gmail.com");
let _ = json.update_string("message.ccRecipients[0].emailAddress.name", "Chilkat Blog");
let _ = json.update_string("message.ccRecipients[0].emailAddress.address", "admin@cknotes.com");

let _ = json.update_string("message.attachments[0].\"@odata.type\"", "#microsoft.graph.fileAttachment");
let _ = json.update_string("message.attachments[0].name", "fishing.pdf");
let _ = json.update_string("message.attachments[0].contentType", "application/pdf");
let _ = json.update_int("message.attachments[0].size", attach1.num_bytes());
let _ = json.update_bool("message.attachments[0].isInline", false);
let _ = json.update_bd("message.attachments[0].contentBytes", "base64", &attach1);

let _ = json.update_string("message.attachments[1].\"@odata.type\"", "#microsoft.graph.fileAttachment");
let _ = json.update_string("message.attachments[1].name", "sample.docx");
let _ = json.update_string("message.attachments[1].contentType", "application/vnd.openxmlformats-officedocument.wordprocessingml.document");
let _ = json.update_int("message.attachments[1].size", attach2.num_bytes());
let _ = json.update_bool("message.attachments[1].isInline", false);
let _ = json.update_bd("message.attachments[1].contentBytes", "base64", &attach2);

let _ = json.update_bool("saveToSentItems", true);

// -------------------------------------------------------------
// Important: This example requires Chilkat v9.5.0.68 or greater.
// -------------------------------------------------------------

// Send the HTTP POST (i.e. send the HTML email)
let resp = chilkat::HttpResponse::new();
if http.http_json("POST", "https://graph.microsoft.com/v1.0/me/sendMail", &json, "application/json", &resp).is_err() {
    println!("{}", http.last_error_text());
    return;
}

// The send succeeded if the response status code = 202.
// In the success case, there is no response body.  (We just get the response code to know that it succeeded.)
if resp.status_code() != 202 {
    let _ = json.load(&resp.body_str());
    json.set_emit_compact(false);
    println!("{}", json.emit().unwrap_or_default());
    println!("Failed, response status code = {}", resp.status_code());
} else {
    println!("Outlook Mail with Attachments Sent.");
}