Annotation of embedaddon/curl/docs/examples/smtp-multi.c, revision 1.1
1.1 ! misho 1: /***************************************************************************
! 2: * _ _ ____ _
! 3: * Project ___| | | | _ \| |
! 4: * / __| | | | |_) | |
! 5: * | (__| |_| | _ <| |___
! 6: * \___|\___/|_| \_\_____|
! 7: *
! 8: * Copyright (C) 1998 - 2017, Daniel Stenberg, <daniel@haxx.se>, et al.
! 9: *
! 10: * This software is licensed as described in the file COPYING, which
! 11: * you should have received as part of this distribution. The terms
! 12: * are also available at https://curl.haxx.se/docs/copyright.html.
! 13: *
! 14: * You may opt to use, copy, modify, merge, publish, distribute and/or sell
! 15: * copies of the Software, and permit persons to whom the Software is
! 16: * furnished to do so, under the terms of the COPYING file.
! 17: *
! 18: * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
! 19: * KIND, either express or implied.
! 20: *
! 21: ***************************************************************************/
! 22:
! 23: /* <DESC>
! 24: * SMTP example using the multi interface
! 25: * </DESC>
! 26: */
! 27:
! 28: #include <string.h>
! 29: #include <curl/curl.h>
! 30:
! 31: /* This is an example showing how to send mail using libcurl's SMTP
! 32: * capabilities. It builds on the smtp-mail.c example to demonstrate how to use
! 33: * libcurl's multi interface.
! 34: *
! 35: * Note that this example requires libcurl 7.20.0 or above.
! 36: */
! 37:
! 38: #define FROM "<sender@example.com>"
! 39: #define TO "<recipient@example.com>"
! 40: #define CC "<info@example.com>"
! 41:
! 42: #define MULTI_PERFORM_HANG_TIMEOUT 60 * 1000
! 43:
! 44: static const char *payload_text[] = {
! 45: "Date: Mon, 29 Nov 2010 21:54:29 +1100\r\n",
! 46: "To: " TO "\r\n",
! 47: "From: " FROM " (Example User)\r\n",
! 48: "Cc: " CC " (Another example User)\r\n",
! 49: "Message-ID: <dcd7cb36-11db-487a-9f3a-e652a9458efd@"
! 50: "rfcpedant.example.org>\r\n",
! 51: "Subject: SMTP multi example message\r\n",
! 52: "\r\n", /* empty line to divide headers from body, see RFC5322 */
! 53: "The body of the message starts here.\r\n",
! 54: "\r\n",
! 55: "It could be a lot of lines, could be MIME encoded, whatever.\r\n",
! 56: "Check RFC5322.\r\n",
! 57: NULL
! 58: };
! 59:
! 60: struct upload_status {
! 61: int lines_read;
! 62: };
! 63:
! 64: static size_t payload_source(void *ptr, size_t size, size_t nmemb, void *userp)
! 65: {
! 66: struct upload_status *upload_ctx = (struct upload_status *)userp;
! 67: const char *data;
! 68:
! 69: if((size == 0) || (nmemb == 0) || ((size*nmemb) < 1)) {
! 70: return 0;
! 71: }
! 72:
! 73: data = payload_text[upload_ctx->lines_read];
! 74:
! 75: if(data) {
! 76: size_t len = strlen(data);
! 77: memcpy(ptr, data, len);
! 78: upload_ctx->lines_read++;
! 79:
! 80: return len;
! 81: }
! 82:
! 83: return 0;
! 84: }
! 85:
! 86: static struct timeval tvnow(void)
! 87: {
! 88: struct timeval now;
! 89:
! 90: /* time() returns the value of time in seconds since the epoch */
! 91: now.tv_sec = (long)time(NULL);
! 92: now.tv_usec = 0;
! 93:
! 94: return now;
! 95: }
! 96:
! 97: static long tvdiff(struct timeval newer, struct timeval older)
! 98: {
! 99: return (newer.tv_sec - older.tv_sec) * 1000 +
! 100: (newer.tv_usec - older.tv_usec) / 1000;
! 101: }
! 102:
! 103: int main(void)
! 104: {
! 105: CURL *curl;
! 106: CURLM *mcurl;
! 107: int still_running = 1;
! 108: struct timeval mp_start;
! 109: struct curl_slist *recipients = NULL;
! 110: struct upload_status upload_ctx;
! 111:
! 112: upload_ctx.lines_read = 0;
! 113:
! 114: curl_global_init(CURL_GLOBAL_DEFAULT);
! 115:
! 116: curl = curl_easy_init();
! 117: if(!curl)
! 118: return 1;
! 119:
! 120: mcurl = curl_multi_init();
! 121: if(!mcurl)
! 122: return 2;
! 123:
! 124: /* This is the URL for your mailserver */
! 125: curl_easy_setopt(curl, CURLOPT_URL, "smtp://mail.example.com");
! 126:
! 127: /* Note that this option isn't strictly required, omitting it will result in
! 128: * libcurl sending the MAIL FROM command with empty sender data. All
! 129: * autoresponses should have an empty reverse-path, and should be directed
! 130: * to the address in the reverse-path which triggered them. Otherwise, they
! 131: * could cause an endless loop. See RFC 5321 Section 4.5.5 for more details.
! 132: */
! 133: curl_easy_setopt(curl, CURLOPT_MAIL_FROM, FROM);
! 134:
! 135: /* Add two recipients, in this particular case they correspond to the
! 136: * To: and Cc: addressees in the header, but they could be any kind of
! 137: * recipient. */
! 138: recipients = curl_slist_append(recipients, TO);
! 139: recipients = curl_slist_append(recipients, CC);
! 140: curl_easy_setopt(curl, CURLOPT_MAIL_RCPT, recipients);
! 141:
! 142: /* We're using a callback function to specify the payload (the headers and
! 143: * body of the message). You could just use the CURLOPT_READDATA option to
! 144: * specify a FILE pointer to read from. */
! 145: curl_easy_setopt(curl, CURLOPT_READFUNCTION, payload_source);
! 146: curl_easy_setopt(curl, CURLOPT_READDATA, &upload_ctx);
! 147: curl_easy_setopt(curl, CURLOPT_UPLOAD, 1L);
! 148:
! 149: /* Tell the multi stack about our easy handle */
! 150: curl_multi_add_handle(mcurl, curl);
! 151:
! 152: /* Record the start time which we can use later */
! 153: mp_start = tvnow();
! 154:
! 155: /* We start some action by calling perform right away */
! 156: curl_multi_perform(mcurl, &still_running);
! 157:
! 158: while(still_running) {
! 159: struct timeval timeout;
! 160: fd_set fdread;
! 161: fd_set fdwrite;
! 162: fd_set fdexcep;
! 163: int maxfd = -1;
! 164: int rc;
! 165: CURLMcode mc; /* curl_multi_fdset() return code */
! 166:
! 167: long curl_timeo = -1;
! 168:
! 169: /* Initialise the file descriptors */
! 170: FD_ZERO(&fdread);
! 171: FD_ZERO(&fdwrite);
! 172: FD_ZERO(&fdexcep);
! 173:
! 174: /* Set a suitable timeout to play around with */
! 175: timeout.tv_sec = 1;
! 176: timeout.tv_usec = 0;
! 177:
! 178: curl_multi_timeout(mcurl, &curl_timeo);
! 179: if(curl_timeo >= 0) {
! 180: timeout.tv_sec = curl_timeo / 1000;
! 181: if(timeout.tv_sec > 1)
! 182: timeout.tv_sec = 1;
! 183: else
! 184: timeout.tv_usec = (curl_timeo % 1000) * 1000;
! 185: }
! 186:
! 187: /* get file descriptors from the transfers */
! 188: mc = curl_multi_fdset(mcurl, &fdread, &fdwrite, &fdexcep, &maxfd);
! 189:
! 190: if(mc != CURLM_OK) {
! 191: fprintf(stderr, "curl_multi_fdset() failed, code %d.\n", mc);
! 192: break;
! 193: }
! 194:
! 195: /* On success the value of maxfd is guaranteed to be >= -1. We call
! 196: select(maxfd + 1, ...); specially in case of (maxfd == -1) there are
! 197: no fds ready yet so we call select(0, ...) --or Sleep() on Windows--
! 198: to sleep 100ms, which is the minimum suggested value in the
! 199: curl_multi_fdset() doc. */
! 200:
! 201: if(maxfd == -1) {
! 202: #ifdef _WIN32
! 203: Sleep(100);
! 204: rc = 0;
! 205: #else
! 206: /* Portable sleep for platforms other than Windows. */
! 207: struct timeval wait = { 0, 100 * 1000 }; /* 100ms */
! 208: rc = select(0, NULL, NULL, NULL, &wait);
! 209: #endif
! 210: }
! 211: else {
! 212: /* Note that on some platforms 'timeout' may be modified by select().
! 213: If you need access to the original value save a copy beforehand. */
! 214: rc = select(maxfd + 1, &fdread, &fdwrite, &fdexcep, &timeout);
! 215: }
! 216:
! 217: if(tvdiff(tvnow(), mp_start) > MULTI_PERFORM_HANG_TIMEOUT) {
! 218: fprintf(stderr,
! 219: "ABORTING: Since it seems that we would have run forever.\n");
! 220: break;
! 221: }
! 222:
! 223: switch(rc) {
! 224: case -1: /* select error */
! 225: break;
! 226: case 0: /* timeout */
! 227: default: /* action */
! 228: curl_multi_perform(mcurl, &still_running);
! 229: break;
! 230: }
! 231: }
! 232:
! 233: /* Free the list of recipients */
! 234: curl_slist_free_all(recipients);
! 235:
! 236: /* Always cleanup */
! 237: curl_multi_remove_handle(mcurl, curl);
! 238: curl_multi_cleanup(mcurl);
! 239: curl_easy_cleanup(curl);
! 240: curl_global_cleanup();
! 241:
! 242: return 0;
! 243: }
FreeBSD-CVSweb <freebsd-cvsweb@FreeBSD.org>
![[BACK]](/icons/cvsweb/back.gif){kind=icon}
Return to smtp-multi.c CVS log ![[TXT]](/icons/cvsweb/text.gif){kind=icon}
![[DIR]](/icons/cvsweb/dir.gif){kind=icon}
Up to [ELWIX - Embedded LightWeight unIX -] / embedaddon / curl / docs / examples