异常处理并邮件发送且可防止程序崩溃

// Note that the only valid version of the GPL as far as jwSMTP // is concerned is v2 of the license (ie v2, not v2.2 or v3.x or whatever), // unless explicitly otherwise stated. // // This file is part of the jwSMTP library. // // jwSMTP library is free software; you can redistribute it and/or modify // it under the terms of the GNU General Public License as published by // the Free Software Foundation; version 2 of the License. // // jwSMTP library is distributed in the hope that it will be useful, // but WITHOUT ANY WARRANTY; without even the implied warranty of // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the // GNU General Public License for more details. // // You should have received a copy of the GNU General Public License // along with jwSMTP library; if not, write to the Free Software // Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA // // jwSMTP library // http://johnwiggins.net // smtplib@johnwiggins.net // #include "stdafx.h" #ifdef WIN32 // std::vector<std::string> This gives this warning in VC.. // bloody annoying, there is a way round it according to MS. // The debugger basically cannot browse anything with a name // longer than 256 characters, "get with the template program MS". #pragma warning( disable : 4786 ) #endif #include <fstream> #include <sstream> // ostrstream #include <ctime> // for localtime #include <cassert> #include "mailer.h" #include "base64.h" namespace jwsmtp { mailer::mailer(const char* TOaddress, const char* FROMaddress, const char* Subject, const std::vector<char>& Message, const char* Nameserver, unsigned short Port, bool MXLookup): type(LOGIN), subject(Subject), server(getserveraddress(TOaddress)), nameserver(Nameserver), port(htons(Port)), // make the 'port' network byte order. lookupMXRecord(MXLookup), auth(false) { // Parse the email addresses into an Address structure. setsender(FROMaddress); addrecipient(TOaddress); setmessage(Message); initNetworking(); // in win32 init networking, else just does nothin' } mailer::mailer(const char* TOaddress, const char* FROMaddress, const char* Subject, const char* Message, const char* Nameserver, unsigned short Port, bool MXLookup): type(LOGIN), subject(Subject), server(getserveraddress(TOaddress)), nameserver(Nameserver), port(htons(Port)), // make the 'port' network byte order. lookupMXRecord(MXLookup), auth(false) { // Parse the email addresses into an Address structure. setsender(FROMaddress); addrecipient(TOaddress); setmessage(Message); initNetworking(); // in win32 init networking, else just does nothin' } mailer::mailer(bool MXLookup, unsigned short Port): type(LOGIN), port(htons(Port)), lookupMXRecord(MXLookup), auth(false) { initNetworking(); // in win32 init networking, else just does nothin' } mailer::~mailer() { } bool mailer::setmessage(const std::string& newmessage) { if(!newmessage.length()) return false; message.clear(); // erase the old message for (std::string::size_type i = 0; i < newmessage.length(); ++i) message.push_back(newmessage[i]); checkRFCcompat(); return true; } bool mailer::setmessage(const std::vector<char>& newmessage) { if(!newmessage.size()) return false; message = newmessage; checkRFCcompat(); return true; } bool mailer::setmessageHTML(const std::string& newmessage) { if(!newmessage.length()) return false; messageHTML.clear(); // erase the old message for (std::string::size_type i = 0; i < newmessage.length(); ++i) messageHTML.push_back(newmessage[i]); messageHTML = base64encode(messageHTML); return true; } bool mailer::setmessageHTML(const std::vector<char>& newmessage) { if(!newmessage.size()) return false; messageHTML = base64encode(newmessage); return true; } bool mailer::setmessageHTMLfile(const std::string& filename) { if(!filename.length()) return false; std::ifstream file(filename.c_str(), std::ios::binary | std::ios::in); if(!file) return false; std::vector<char> filedata; char c = file.get(); for(; file.good(); c = file.get()) { if(file.bad()) break; filedata.push_back(c); } messageHTML = base64encode(filedata); return true; } // this breaks a message line up to be less than 1000 chars per line. // keeps words intact also. // Check line returns are in the form "\r\n" // (qmail balks otherwise, i.e. LAME server) void mailer::checkRFCcompat() { // Check the line breaks. std::vector<char>::iterator it; for(it = message.begin(); it != message.end(); ++it) { // look for \n add \r before if not there. Pretty lame but still. // haven't thought of a better way yet. if(*it == '\n') { if(it == message.begin()) { it = message.insert(it, '\r'); ++it; // step past newline continue; } if((*(it -1) != '\r') ) { // add a return before '\n' it = message.insert(it, '\r'); ++it; // step past newline } } } // if we get a period on a line by itself // add another period to stop the server ending the mail prematurely. // ( suggested by david Irwin ) if(message.size() == 1) { if(*(message.begin()) == '.') message.push_back('.'); } else if(message.size() == 2) { if(*(message.begin()) == '.') { it = message.begin(); it = message.insert(it, '.'); } } else { if(*(message.begin()) == '.') { it = message.begin(); it = message.insert(it, '.'); } for(it = message.begin()+2; it != message.end(); ++it) { // follow the rfc. Add '.' if the first character on a line is '.' if(*it == '\n') { if( ((it + 1) != message.end()) && (*(it +1) == '.') ) { it = message.insert(it + 1, '.'); ++it; // step past } } } } // don't do anything if we are not longer than a 1000 characters if(message.size() < 1000) return; // now we have checked line breaks // check line lengths. int count(1); for(it = message.begin(); it < message.end(); ++it, ++count) { if(*it == '\r') { count = 0; // reset for a new line. ++it; // get past newline continue; } else if(count >= 998) { ++it; if(*it != ' ') { // we are not in a word!! // it should never get to message.begin() because we // start at least 998 chars into the message! // Also, assume a word isn't bigger than 997 chars! (seems reasonable) std::vector<char>::iterator pos = it; for(int j = 0; j < 997; ++j, --pos) { if(*pos == ' ') { it = ++pos; // get past the space. break; } } } if(it < message.end()) it = message.insert(it, '\r'); ++it; if(it < message.end()) it = message.insert(it, '\n'); count = 0; // reset for a new line. } } count=1; // reset the count if(messageHTML.size()) { for(it = messageHTML.begin(); it < messageHTML.end(); ++it, ++count) { if(*it == '\r') { count = 0; // reset for a new line. ++it; // get past newline continue; } else if(count >= 998) {