Function setup_curl

imap-send.c:1628–1702

#ifdef USE_CURL_FOR_IMAP_SEND
static CURL *setup_curl(struct imap_server_conf *srvc, struct credential *cred)
{
	CURL *curl;
	struct strbuf path = STRBUF_INIT;
	char *uri_encoded_folder;

	if (curl_global_init(CURL_GLOBAL_ALL) != CURLE_OK)
		die("curl_global_init failed");

	curl = curl_easy_init();

	if (!curl)
		die("curl_easy_init failed");

	server_fill_credential(srvc, cred);
	curl_easy_setopt(curl, CURLOPT_USERNAME, srvc->user);

	/*
	 * Use CURLOPT_PASSWORD irrespective of whether there is
	 * an auth method specified or not, unless it's OAuth2.0,
	 * where we use CURLOPT_XOAUTH2_BEARER.
	 */
	if (!srvc->auth_method ||
	    (strcmp(srvc->auth_method, "XOAUTH2") &&
	    strcmp(srvc->auth_method, "OAUTHBEARER")))
		curl_easy_setopt(curl, CURLOPT_PASSWORD, srvc->pass);

	strbuf_addstr(&path, srvc->use_ssl ? "imaps://" : "imap://");
	strbuf_addstr(&path, srvc->host);
	if (!path.len || path.buf[path.len - 1] != '/')
		strbuf_addch(&path, '/');

	if (!list_folders) {
		uri_encoded_folder = curl_easy_escape(curl, srvc->folder, 0);
		if (!uri_encoded_folder)
			die("failed to encode server folder");
		strbuf_addstr(&path, uri_encoded_folder);
		curl_free(uri_encoded_folder);
	}

	curl_easy_setopt(curl, CURLOPT_URL, path.buf);
	strbuf_release(&path);
	curl_easy_setopt(curl, CURLOPT_PORT, (long)srvc->port);

	if (srvc->auth_method) {
		if (!strcmp(srvc->auth_method, "XOAUTH2") ||
		    !strcmp(srvc->auth_method, "OAUTHBEARER")) {

			/*
			 * While CURLOPT_XOAUTH2_BEARER looks as if it only supports XOAUTH2,
			 * upon debugging, it has been found that it is capable of detecting
			 * the best option out of OAUTHBEARER and XOAUTH2.
			 */
			curl_easy_setopt(curl, CURLOPT_XOAUTH2_BEARER, srvc->pass);
		} else {
			struct strbuf auth = STRBUF_INIT;
			strbuf_addstr(&auth, "AUTH=");
			strbuf_addstr(&auth, srvc->auth_method);