我正在尝试使用libcurl SMTP，这个例子一切正常： http://curl.haxx.se/libcurl/c/smtp-mail.html
#include <stdio.h>
#include <string.h>
#include <curl/curl.h>
/* This is a simple example showing how to send mail using libcurl's SMTP
* capabilities. For an exmaple of using the multi interface please see
* smtp-multi.c.
*
* Note that this example requires libcurl 7.20.0 or above.
*/
#define FROM "<sender@example.org>"
#define TO "<addressee@example.net>"
#define CC "<info@example.org>"
static const char *payload_text[] = {
"Date: Mon, 29 Nov 2010 21:54:29 +1100\r\n",
"To: " TO "\r\n",
"From: " FROM "(Example User)\r\n",
"Cc: " CC "(Another example User)\r\n",
"Message-ID: <dcd7cb36-11db-487a-9f3a-e652a9458efd@rfcpedant.example.org>\r\n",
"Subject: SMTP example message\r\n",
"\r\n", /* empty line to divide headers from body, see RFC5322 */
"The body of the message starts here.\r\n",
"\r\n",
"It could be a lot of lines, could be MIME encoded, whatever.\r\n",
"Check RFC5322.\r\n",
NULL
};
struct upload_status {
int lines_read;
};
static size_t payload_source(void *ptr, size_t size, size_t nmemb, void *userp)
{
struct upload_status *upload_ctx = (struct upload_status *)userp;
const char *data;
if((size == 0) || (nmemb == 0) || ((size*nmemb) < 1)) {
return 0;
}
data = payload_text[upload_ctx->lines_read];
if(data) {
size_t len = strlen(data);
memcpy(ptr, data, len);
upload_ctx->lines_read++;
return len;
}
return 0;
}
int main(void)
{
CURL *curl;
CURLcode res = CURLE_OK;
struct curl_slist *recipients = NULL;
struct upload_status upload_ctx;
upload_ctx.lines_read = 0;
curl = curl_easy_init();
if(curl) {
/* This is the URL for your mailserver */
curl_easy_setopt(curl, CURLOPT_URL, "smtp://mail.example.com");
/* Note that this option isn't strictly required, omitting it will result in
* libcurl sending the MAIL FROM command with empty sender data. All
* autoresponses should have an empty reverse-path, and should be directed
* to the address in the reverse-path which triggered them. Otherwise, they
* could cause an endless loop. See RFC 5321 Section 4.5.5 for more details.
*/
curl_easy_setopt(curl, CURLOPT_MAIL_FROM, FROM);
/* Add two recipients, in this particular case they correspond to the
* To: and Cc: addressees in the header, but they could be any kind of
* recipient. */
recipients = curl_slist_append(recipients, TO);
recipients = curl_slist_append(recipients, CC);
curl_easy_setopt(curl, CURLOPT_MAIL_RCPT, recipients);
/* We're using a callback function to specify the payload (the headers and
* body of the message). You could just use the CURLOPT_READDATA option to
* specify a FILE pointer to read from. */
curl_easy_setopt(curl, CURLOPT_READFUNCTION, payload_source);
curl_easy_setopt(curl, CURLOPT_READDATA, &upload_ctx);
curl_easy_setopt(curl, CURLOPT_UPLOAD, 1L);
/* Send the message */
res = curl_easy_perform(curl);
/* Check for errors */
if(res != CURLE_OK)
fprintf(stderr, "curl_easy_perform() failed: %s\n",
curl_easy_strerror(res));
/* Free the list of recipients */
curl_slist_free_all(recipients);
/* curl won't send the QUIT command until you call cleanup, so you should be
* able to re-use this connection for additional messages (setting
* CURLOPT_MAIL_FROM and CURLOPT_MAIL_RCPT as required, and calling
* curl_easy_perform() again. It may not be a good idea to keep the
* connection open for a very long time though (more than a few minutes may
* result in the server timing out the connection), and you do want to clean
* up in the end.
*/
curl_easy_cleanup(curl);
}
return (int)res;
}
但如果我大大增加了有效载荷功能，我会收到一个错误：
读取函数返回有趣的值 分段错误
我怎么能解决这个问题？
答案 0 :(得分：0)
The following code is to send a plain text message
rather than a email message. but the basic ideas are the same.
did you set the curl write function option to point to a callback function?
curl_easy_setopt(curlHandle, CURLOPT_WRITEFUNCTION, &CurlWriteFunction);
//////////////////
where the CurlWriteFunction() would look similar to the following:
//////////////////
size_t CurlWriteFunction(void *ptr, size_t size, size_t nmemb, void *stream)
{
memset(CurlMsgStr, 0, MAX_MSG_STR);
phpCurlError = FALSE;
if(((char *)ptr)[0] == '1' || ((char *)ptr)[1] == '1')
{
phpCurlError = FALSE;
sprintf(CurlMsgStr,"Record sent to URL OK...[%c%c]\n",
((char *)ptr)[0],((char *)ptr)[1]);
}
else if(((char *)ptr)[0] == '0' || ((char *)ptr)[1] == '0')
{
phpCurlError = TRUE;
sprintf(CurlMsgStr,"Record sent to URL FAILED...[%c%c]\n",
((char *)ptr)[0],((char *)ptr)[1]);
}
else
{
phpCurlError = TRUE;
sprintf(CurlMsgStr,"UNKNOWN URL RETURN VALUE...[%c%c]\n",
((char *)ptr)[0],((char *)ptr)[1]);
}
return (nmemb);
} // CurlWriteFunction()
////////////////////
Then send the curl message with something like this:
////////////////////
void sendViaCurl(char *str)
{
#if 0 // eliminate heap thrashing of 8k malloc/free
char* postData = NULL;
#else
static char* postData = NULL;
#endif
CURLcode curlErr;
long curlRespCode = 0;
char recNameStr[MAX_STRING_LENGTH];
if(curlHandle)
{
// Specify the POST data
if(postData == NULL) // then first time through
{
postData = malloc(MAX_RESPONSE_LENGTH * 2);
}
memset(postData,0,MAX_RESPONSE_LENGTH * 2);
sprintf(postData, "%s", str);
curl_easy_setopt(curlHandle, CURLOPT_POSTFIELDS, postData);
// Execute the POST, response goes to STDOUT
curlErr = curl_easy_perform(curlHandle);
// Report any CURL errors
if(curlErr)
{
log_error("CURL ERROR -- %s\n", curl_easy_strerror(curlErr));
}
// Get info on the POST data transfer to URL
curl_easy_getinfo(curlHandle, CURLINFO_RESPONSE_CODE, &curlRespCode);
// log_error( "CURL RESPONSE CODE -- %ld\n", curlRespCode);
if(phpCurlError)
{
log_error( " %s rec rejected by DB -- %s\n", recNameStr, str);
curlRecRejected = TRUE;
}
else
{
log_error( "%s [%s] rec accepted by DB...\n",recNameStr, str);
curlRecRejected = FALSE;
}
}
else
{
log_error( "NOT ABLE TO GET CURL HANDLE...RECORD NOT SENT\n");
curlRecRejected = TRUE;
}
#if 0 // eliminate thrashing of heap with 8k malloc/free
if(postData)
{
free(postData);
postData = NULL;
}
#endif
return;
} // sendViaCurl()