smtp-mime.c
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22 
23 /* <DESC>
24  * SMTP example showing how to send mime e-mails
25  * </DESC>
26  */
27 
28 #include <stdio.h>
29 #include <string.h>
30 #include <curl/curl.h>
31 
32 /* This is a simple example showing how to send mime mail using libcurl's SMTP
33  * capabilities. For an example of using the multi interface please see
34  * smtp-multi.c.
35  *
36  * Note that this example requires libcurl 7.56.0 or above.
37  */
38 
39 #define FROM "<sender@example.org>"
40 #define TO "<addressee@example.net>"
41 #define CC "<info@example.org>"
42 
43 static const char *headers_text[] = {
44  "Date: Tue, 22 Aug 2017 14:08:43 +0100",
45  "To: " TO,
46  "From: " FROM " (Example User)",
47  "Cc: " CC " (Another example User)",
48  "Message-ID: <dcd7cb36-11db-487a-9f3a-e652a9458efd@"
49  "rfcpedant.example.org>",
50  "Subject: example sending a MIME-formatted message",
51  NULL
52 };
53 
54 static const char inline_text[] =
55  "This is the inline text message of the e-mail.\r\n"
56  "\r\n"
57  " It could be a lot of lines that would be displayed in an e-mail\r\n"
58  "viewer that is not able to handle HTML.\r\n";
59 
60 static const char inline_html[] =
61  "<html><body>\r\n"
62  "<p>This is the inline <b>HTML</b> message of the e-mail.</p>"
63  "<br />\r\n"
64  "<p>It could be a lot of HTML data that would be displayed by "
65  "e-mail viewers able to handle HTML.</p>"
66  "</body></html>\r\n";
67 
68 
69 int main(void)
70 {
71  CURL *curl;
72  CURLcode res = CURLE_OK;
73  struct curl_slist *headers = NULL;
74  struct curl_slist *recipients = NULL;
75  struct curl_slist *slist = NULL;
76  curl_mime *mime;
77  curl_mime *alt;
78  curl_mimepart *part;
79  const char **cpp;
80 
81  curl = curl_easy_init();
82  if(curl) {
83  /* This is the URL for your mailserver */
84  curl_easy_setopt(curl, CURLOPT_URL, "smtp://mail.example.com");
85 
86  /* Note that this option isn't strictly required, omitting it will result
87  * in libcurl sending the MAIL FROM command with empty sender data. All
88  * autoresponses should have an empty reverse-path, and should be directed
89  * to the address in the reverse-path which triggered them. Otherwise,
90  * they could cause an endless loop. See RFC 5321 Section 4.5.5 for more
91  * details.
92  */
93  curl_easy_setopt(curl, CURLOPT_MAIL_FROM, FROM);
94 
95  /* Add two recipients, in this particular case they correspond to the
96  * To: and Cc: addressees in the header, but they could be any kind of
97  * recipient. */
98  recipients = curl_slist_append(recipients, TO);
99  recipients = curl_slist_append(recipients, CC);
100  curl_easy_setopt(curl, CURLOPT_MAIL_RCPT, recipients);
101 
102  /* Build and set the message header list. */
103  for(cpp = headers_text; *cpp; cpp++)
104  headers = curl_slist_append(headers, *cpp);
105  curl_easy_setopt(curl, CURLOPT_HTTPHEADER, headers);
106 
107  /* Build the mime message. */
108  mime = curl_mime_init(curl);
109 
110  /* The inline part is an alterative proposing the html and the text
111  versions of the e-mail. */
112  alt = curl_mime_init(curl);
113 
114  /* HTML message. */
115  part = curl_mime_addpart(alt);
116  curl_mime_data(part, inline_html, CURL_ZERO_TERMINATED);
117  curl_mime_type(part, "text/html");
118 
119  /* Text message. */
120  part = curl_mime_addpart(alt);
121  curl_mime_data(part, inline_text, CURL_ZERO_TERMINATED);
122 
123  /* Create the inline part. */
124  part = curl_mime_addpart(mime);
125  curl_mime_subparts(part, alt);
126  curl_mime_type(part, "multipart/alternative");
127  slist = curl_slist_append(NULL, "Content-Disposition: inline");
128  curl_mime_headers(part, slist, 1);
129 
130  /* Add the current source program as an attachment. */
131  part = curl_mime_addpart(mime);
132  curl_mime_filedata(part, "smtp-mime.c");
133  curl_easy_setopt(curl, CURLOPT_MIMEPOST, mime);
134 
135  /* Send the message */
136  res = curl_easy_perform(curl);
137 
138  /* Check for errors */
139  if(res != CURLE_OK)
140  fprintf(stderr, "curl_easy_perform() failed: %s\n",
141  curl_easy_strerror(res));
142 
143  /* Free lists. */
144  curl_slist_free_all(recipients);
145  curl_slist_free_all(headers);
146 
147  /* curl won't send the QUIT command until you call cleanup, so you should
148  * be able to re-use this connection for additional messages (setting
149  * CURLOPT_MAIL_FROM and CURLOPT_MAIL_RCPT as required, and calling
150  * curl_easy_perform() again. It may not be a good idea to keep the
151  * connection open for a very long time though (more than a few minutes
152  * may result in the server timing out the connection), and you do want to
153  * clean up in the end.
154  */
155  curl_easy_cleanup(curl);
156 
157  /* Free multipart message. */
158  curl_mime_free(mime);
159  }
160 
161  return (int)res;
162 }
curl_mime_filedata
CURL_EXTERN CURLcode curl_mime_filedata(curl_mimepart *part, const char *filename)
Definition: mime.c:1262
curl_mime_headers
CURL_EXTERN CURLcode curl_mime_headers(curl_mimepart *part, struct curl_slist *headers, int take_ownership)
Definition: mime.c:1352
curl_slist
Definition: curl.h:2335
inline_text
static const char inline_text[]
Definition: smtp-mime.c:54
curl_mime_free
CURL_EXTERN void curl_mime_free(curl_mime *mime)
Definition: mime.c:1110
inline_html
static const char inline_html[]
Definition: smtp-mime.c:60
curl_mime_data
CURL_EXTERN CURLcode curl_mime_data(curl_mimepart *part, const char *data, size_t datasize)
Definition: mime.c:1230
curl_mime_s
Definition: mime.h:88
CURLcode
CURLcode
Definition: curl.h:454
curl_mime_init
CURL_EXTERN curl_mime * curl_mime_init(CURL *easy)
res
static int res
Definition: libntlmconnect.c:39
headers_text
static const char * headers_text[]
Definition: smtp-mime.c:43
curl_easy_setopt
#define curl_easy_setopt(handle, option, value)
Definition: typecheck-gcc.h:41
curl_slist_append
CURL_EXTERN struct curl_slist * curl_slist_append(struct curl_slist *, const char *)
Definition: slist.c:89
curl_easy_init
CURL_EXTERN CURL * curl_easy_init(void)
Definition: easy.c:343
curl_easy_cleanup
CURL_EXTERN void curl_easy_cleanup(CURL *curl)
CURLE_OK
Definition: curl.h:455
CC
#define CC
Definition: smtp-mime.c:41
curl_mimepart_s
Definition: mime.h:98
TO
#define TO
Definition: smtp-mime.c:40
curl_mime_addpart
CURL_EXTERN curl_mimepart * curl_mime_addpart(curl_mime *mime)
Definition: mime.c:1169
CURL
void CURL
Definition: curl.h:102
curl_mime_type
CURL_EXTERN CURLcode curl_mime_type(curl_mimepart *part, const char *mimetype)
Definition: mime.c:1311
FROM
#define FROM
Definition: smtp-mime.c:39
CURL_ZERO_TERMINATED
#define CURL_ZERO_TERMINATED
Definition: curl.h:1966
fprintf
#define fprintf
Definition: curl_printf.h:41
main
int main(void)
Definition: smtp-mime.c:69
curl
static CURL * curl
Definition: sessioninfo.c:35
curl_easy_strerror
CURL_EXTERN const char * curl_easy_strerror(CURLcode)
Definition: strerror.c:57
curl_slist_free_all
CURL_EXTERN void curl_slist_free_all(struct curl_slist *)
Definition: slist.c:129
curl_easy_perform
CURL_EXTERN CURLcode curl_easy_perform(CURL *curl)
curl_mime_subparts
CURL_EXTERN CURLcode curl_mime_subparts(curl_mimepart *part, curl_mime *subparts)
Definition: mime.c:1392

rc_tagdetect_client
Author(s): Monika Florek-Jasinska , Raphael Schaller
autogenerated on Sat Feb 13 2021 03:42:16