ios基于libcurl发送带附件邮件

最近开发，为了查看日志文件，引入日志及邮件发送功能
日志使用的是boost库，邮件功能是使用libcurl库，分享下

后续把压缩上传功能加上

邮件发送功能，示例代码使用了一个第三方的类和个api的两个例子，可以参考 [github](https://github.com/billnie/Exam)

/* * This is the list of basic details you need to tweak to get things right. */#define USERNAME "[e-mail]"#define PASSWORD "***"#define SMTPSERVER "smtp.exam.com.cn"#define SMTPPORT ":25" /* it is a colon+port string, but you can set itto "" to use the default port */#define RECIPIENT "<[e-mail]>"#define MAILFROM "<[e-mail]>"#define MULTI_PERFORM_HANG_TIMEOUT 60 * 1000/* Note that you should include the actual meta data headers here as well if you want the mail to have a Subject, another From:, show a To: or whatever you think your mail should feature! */static struct timeval tvnow(void){    /*     ** time() returns the value of time in seconds since the Epoch.     */    struct timeval now;    now.tv_sec = (long)time(NULL);    now.tv_usec = 0;    return now;}static long tvdiff(struct timeval newer, struct timeval older){    return (newer.tv_sec-older.tv_sec)*1000+    (newer.tv_usec-older.tv_usec)/1000;}#define FROM     "<[e-mail]>"#define TO       "<[e-mail]>"#define CC       "<[e-mail]>"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: App-log\r\n",    "\r\n", /* empty line to divide headers from body, see RFC5322 */    "This is the App ios app logs.\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 vmain(void){    CURL *curl;    CURLM *mcurl;    int still_running = 1;    struct timeval mp_start;    struct curl_slist *recipients = NULL;    struct upload_status upload_ctx;    upload_ctx.lines_read = 0;    curl_global_init(CURL_GLOBAL_DEFAULT);    curl = curl_easy_init();    if(!curl)        return 1;    mcurl = curl_multi_init();    if(!mcurl)        return 2;    /* This is the URL for your mailserver */    curl_easy_setopt(curl, CURLOPT_URL, "smtp://smtp.protruly.com.cn:25");    /* 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);    curl_easy_setopt(curl, CURLOPT_VERBOSE, 1L);    curl_easy_setopt(curl, CURLOPT_USERNAME, USERNAME);    curl_easy_setopt(curl, CURLOPT_PASSWORD, PASSWORD);    /* Tell the multi stack about our easy handle */    curl_multi_add_handle(mcurl, curl);    /* Record the start time which we can use later */    mp_start = tvnow();    /* We start some action by calling perform right away */    curl_multi_perform(mcurl, &still_running);    while(still_running) {        struct timeval timeout;        fd_set fdread;        fd_set fdwrite;        fd_set fdexcep;        int maxfd = -1;        int rc;        CURLMcode mc; /* curl_multi_fdset() return code */        long curl_timeo = -1;        /* Initialise the file descriptors */        FD_ZERO(&fdread);        FD_ZERO(&fdwrite);        FD_ZERO(&fdexcep);        /* Set a suitable timeout to play around with */        timeout.tv_sec = 1;        timeout.tv_usec = 0;        curl_multi_timeout(mcurl, &curl_timeo);        if(curl_timeo >= 0) {            timeout.tv_sec = curl_timeo / 1000;            if(timeout.tv_sec > 1)                timeout.tv_sec = 1;            else                timeout.tv_usec = (curl_timeo % 1000) * 1000;        }        /* get file descriptors from the transfers */        mc = curl_multi_fdset(mcurl, &fdread, &fdwrite, &fdexcep, &maxfd);        if(mc != CURLM_OK) {            fprintf(stderr, "curl_multi_fdset() failed, code %d.\n", mc);            break;        }        /* On success the value of maxfd is guaranteed to be >= -1. We call         select(maxfd + 1, ...); specially in case of (maxfd == -1) there are         no fds ready yet so we call select(0, ...) --or Sleep() on Windows--         to sleep 100ms, which is the minimum suggested value in the         curl_multi_fdset() doc. */        if(maxfd == -1) {#ifdef _WIN32            Sleep(100);            rc = 0;#else            /* Portable sleep for platforms other than Windows. */            struct timeval wait = { 0, 100 * 1000 }; /* 100ms */            rc = select(0, NULL, NULL, NULL, &wait);#endif        }        else {            /* Note that on some platforms 'timeout' may be modified by select().             If you need access to the original value save a copy beforehand. */            rc = select(maxfd+1, &fdread, &fdwrite, &fdexcep, &timeout);        }        if(tvdiff(tvnow(), mp_start) > MULTI_PERFORM_HANG_TIMEOUT) {            fprintf(stderr,                    "ABORTING: Since it seems that we would have run forever.\n");            break;        }          switch(rc) {              case -1:  /* select error */                  break;              case 0:   /* timeout */              default:  /* action */                  curl_multi_perform(mcurl, &still_running);                  break;          }      }      /* Free the list of recipients */      curl_slist_free_all(recipients);      /* Always cleanup */      curl_multi_remove_handle(mcurl, curl);      curl_multi_cleanup(mcurl);      curl_easy_cleanup(curl);      curl_global_cleanup();      return 0;  }int main(){//    vmain();//    xmain();    std::vector<std::string> secret =    {    };    std::vector<std::string> to =    {        "[e-mail]"    };    std::vector<std::string> cc =    {    };    std::vector<std::string> attach =    {        "/Users/zzx/up.txt"    };    CurlSmtp* mail = new CurlSmtp("[e-mail]"        , "****"        , to        , secret        , cc        , attach        , "DialChat-app log"        , "This is App ios app log file"        , "smtp.exam.com.cn"        , "25");    //qq587    mail->send_mail();    sleep(5);    // send another mail//  mail->set_from("[e-mail]");//  mail->set_password("adfsf");//  mail->set_subject("test2");//  mail->set_message("another boy hehe hahah");//  mail->set_server(SMTP_SERVER);//  mail->set_port(SMTP_PORT);////  cc.clear();//  cc.push_back("[e-mail]");//  mail->set_cc(cc);////  to.clear();//  to.push_back("[e-mail]");//  mail->set_to(to);//  //  attach.clear();//  attach.push_back("./1.png");//  mail->set_attach(attach);//  //  mail->send_mail();    sleep(5);    delete mail;    return 0;}

ios使用

int sendmail(const char *url){    std::vector<std::string> secret =    {    };    std::vector<std::string> to =    {        "[e-mail]"    };    std::vector<std::string> cc =    {    };    std::vector<std::string> attach =    {    };    if(url ){        attach.push_back(url);    }    CurlSmtp* mail = new CurlSmtp("[e-mail]"                                  , "bql-1234"                                  , to                                  , secret                                  , cc                                  , attach                                  , "App-app log"                                  , "This is App ios app log file"                                  , "smtp.exam.com.cn"                                  , "25");    //qq587    mail->send_mail();    delete mail;    return 0;}//调用-(RACSignal* ) requsetMailLog:(NSString *)file{    RACSignal *signal;    signal = [RACSignal createSignal: ^RACDisposable *(id<RACSubscriber> subscriber) {        dispatch_async(dispatch_get_global_queue(0, 0),^(void){            int ret;            ret = sendmail([file cStringUsingEncoding:NSUTF8StringEncoding]);            [subscriber sendNext:[NSNumber numberWithInt:ret]];            [subscriber sendCompleted];        });        return nil;    }];    return signal;}