more advanced parsing
This commit is contained in:
parent
9da589839c
commit
c9f447009b
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@ -1,5 +1,3 @@
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#include "utils/utils.h"
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#include "utils/base64.h"
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#include <email_parser/emailparser.h>
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#include <opencv2/opencv.hpp>
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@ -9,6 +7,7 @@
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#include <opencv2/videoio.hpp>
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#include <utils/utils.h>
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#include <utils/base64.h>
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#include <check/check.h>
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#include <boost/regex.hpp>
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#include <boost/algorithm/string/regex.hpp>
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@ -37,28 +36,21 @@ std::map<std::string, std::string> EmailParser::parse(std::string &email_content
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//3. Search "t=\d{8}T\d{4,6}&s=\d{1,6}\.\d{1,2}&fn=\d{10,16}&i=\d{6}&fp=\d{10}&n=\d". Note that in some emails = and & signs could be replaced with its code in HTTP requests: %3D, %26
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// 3.1 If not found, notify the user that we could not parse the .eml file
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/* Find content-types */
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Check c;
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std::vector<std::pair<int, int>> content_types = {};
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boost::regex content_type_regex("Content-Type: image/(gif|png|jpg)");
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/* Find image content-types */
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boost::regex images_content_type_regex("Content-Type: image/(gif|png|jpg)");
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boost::regex text_content_types_regex("Content-Type: text\\/(html|plain)");
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boost::regex part_end_regex("--.{5,48}");
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for (boost::sregex_iterator it{email_content.begin(), email_content.end(), content_type_regex}, end{}; it != end; it ++) {
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unsigned int start_position = it->position(), end_position = -1;
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for (boost::sregex_iterator it2{email_content.begin() + start_position, email_content.end(), part_end_regex}, end2{}; it2 != end2; it2++) {
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end_position = it2->position();
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break;
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}
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content_types.push_back(std::pair<int, int>(start_position, end_position));
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}
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/* iterate through found content-types and try searching qr codes, decode them and see if it's the needed data */
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for (unsigned int i = 0; i < content_types.size(); i ++) {
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boost::regex to_erase("(Content.{5,64}\\r\\n)+");
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// boost::regex check_data_content("t=\\d+T\\d+&s=\\d+\\.\\d+&fn=\\d{16}&i=\\d{4,5}&fp=\\d{10}&n=\\d");
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boost::regex to_erase("([\\w-]+:\\s*.{2,64}\\r\\n)+");
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boost::regex to_erase_two("--.{5,48}");
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std::string part = email_content.substr(content_types[i].first, content_types[i].second);
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std::vector<std::pair<int, int>> images_content_parts = find_parts(images_content_type_regex, part_end_regex, email_content);
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/* iterate through found image content-types and try searching qr codes, decode them and see if it's the needed data */
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for (unsigned int i = 0; i < images_content_parts.size(); i ++) {
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std::string part = email_content.substr(images_content_parts[i].first, images_content_parts[i].second);
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boost::erase_regex(part, to_erase);
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boost::erase_regex(part, to_erase_two);
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part.erase(std::remove(part.begin(), part.end(), '\r'), part.end());
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@ -80,10 +72,11 @@ std::map<std::string, std::string> EmailParser::parse(std::string &email_content
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}
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cv::QRCodeDetector qrDecoder = cv::QRCodeDetector();
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std::string decoded_qr_params = qrDecoder.detectAndDecode(image);
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boost::regex check_data_content("t=\\d+T\\d+&s=\\d+\\.\\d+&fn=\\d{16}&i=\\d{4,5}&fp=\\d{10}&n=\\d");
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if (boost::regex_match(decoded_qr_params, check_data_content)) {
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std::map<std::string, std::string> paramsMap = get_params_from_string(decoded_qr_params);
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std::string decoded_qr = qrDecoder.detectAndDecode(image);
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std::string parameters = find_check_parameters(decoded_qr);
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if (parameters != "") {
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std::map<std::string, std::string> paramsMap = get_params_from_string(parameters);
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return paramsMap;
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}
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@ -91,17 +84,105 @@ std::map<std::string, std::string> EmailParser::parse(std::string &email_content
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/* If the E-Mail has no QR code in it as a separate part, there's posibilly a QR code inserted using html's tag <img> with base64-encoded image. Try searching it */
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std::vector<std::pair<int, int>> texts_content_parts = find_parts(text_content_types_regex, part_end_regex, email_content);
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for (unsigned int i = 0; i < texts_content_parts.size(); i ++) {
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std::string part = email_content.substr(texts_content_parts[i].first, texts_content_parts[i].second);
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boost::erase_regex(part, to_erase);
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boost::erase_regex(part, to_erase_two);
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//If there's '<' character, most likely that the part's content is plain html, otherwise it's most likely a base64 encoded html.
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if (part.find("<") == std::string::npos) {
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part.erase(std::remove(part.begin(), part.end(), '\r'), part.end());
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part.erase(std::remove(part.begin(), part.end(), '\n'), part.end());
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part = base64_decode(part);
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}
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std::string parameters = find_check_parameters(part);
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if (parameters != "") {
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std::map<std::string, std::string> paramsMap = get_params_from_string(parameters);
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return paramsMap;
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}
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std::string url = extract_qr_url_from_img(part);
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Net n;
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std::string path = get_path_relative_to_home(".local/share/checks_parser/tmp");
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n.get_file(url, path);
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std::ifstream ifile(path, std::ios::in | std::ios::binary);
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const unsigned int size = std::filesystem::file_size(path);
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std::string qr_code_contents(size, '\0');
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ifile.read(qr_code_contents.data(), size);
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std::vector<uchar> data(qr_code_contents.begin(), qr_code_contents.end());
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cv::Mat image = cv::imdecode(cv::Mat(data), 1);
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cv::QRCodeDetector qrDecoder = cv::QRCodeDetector();
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std::string decoded_qr = qrDecoder.detectAndDecode(image);
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parameters = find_check_parameters(decoded_qr);
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if (parameters != "") {
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std::map<std::string, std::string> paramsMap = get_params_from_string(parameters);
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return paramsMap;
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}
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}
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/* If there's no such case, the last chance is <img src="..."> which will have a link with needed parameters or the qr code that should be downloaded and decoded */
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/* If the code has reached this part and found nothing, it's most likely that there are no QR codes at all. */
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// return Check();
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return std::map<std::string, std::string>();
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}
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std::map<std::string, std::string> EmailParser::parse_file(std::string path) {
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std::ifstream ifile(path, std::ios::in | std::ios::binary);
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const unsigned int size = std::filesystem::file_size(path);
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std::string content(size, '\0');
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ifile.read(content.data(), size);
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// std::cout << "Parsing " << path << std::endl;
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// std::ifstream ifile(path, std::ios::in | std::ios::binary);
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// const unsigned int size = std::filesystem::file_size(path);
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// std::string content(size, '\0');
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// ifile.read(content.data(), size);
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std::string content = read_file(path);
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return parse(content);
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return std::map<std::string, std::string>();
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}
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std::vector<std::pair<int, int>> EmailParser::find_parts(const boost::regex &start_regex, const boost::regex &end_regex, const std::string &content) {
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std::vector<std::pair<int, int>> parts = {};
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for (boost::sregex_iterator it{content.begin(), content.end(), start_regex}, end{}; it != end; it ++) {
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unsigned int start_position = it->position(), end_position = content.length();
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for (boost::sregex_iterator it2{content.begin() + start_position, content.end(), end_regex}, end2{}; it2 != end2; it2++) {
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end_position = it2->position();
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break;
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}
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parts.push_back(std::pair<int, int>(start_position, end_position));
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}
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return parts;
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}
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std::string EmailParser::find_check_parameters(std::string &part) {
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boost::regex params_regex ("t(=|%3d)\\d+T\\d+(&|%26)s\\1\\d+\\.\\d+\\2fn\\1\\d{16}\\2i\\1\\d{3,6}\\2fp\\1\\d{9,10}\\2n\\1\\d", boost::regex::icase);
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for (boost::sregex_iterator it{part.begin(), part.end(), params_regex}, end{}; it != end; it++) {
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return it->str();
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}
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return "";
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}
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std::string EmailParser::extract_qr_url_from_img(std::string &part) {
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std::string url = "";
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boost::regex img_tag_regex("<img[^\\n\\r<]*>");
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boost::regex img_url_str("https?:\\/\\/.*(qr(code)?)[^\\n\\r\"]+", boost::regex::icase);
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for (boost::sregex_iterator it{part.begin(), part.end(), img_tag_regex}, end{}; it != end; it++) {
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std::string img_tag = it->str();
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for (boost::sregex_iterator it2{img_tag.begin(), img_tag.end(), img_url_str}, end2{}; it2 != end2; it2++) {
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return it2->str();
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}
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}
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return url;
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}
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@ -3,13 +3,16 @@
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#include <check/check.h>
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#include <map>
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#include <boost/regex.hpp>
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class EmailParser {
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public:
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EmailParser();
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std::map<std::string, std::string> parse(std::string &email_content);
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std::map<std::string, std::string> parse_file(std::string path);
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std::vector<std::pair<int, int>> find_parts(const boost::regex &start_regex, const boost::regex &end_regex, const std::string &content);
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std::string find_check_parameters(std::string &part);
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std::string extract_qr_url_from_img(std::string &part);
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};
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#endif // CHECKS_PARSER_EMAIL_PARSER
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3
main.cpp
3
main.cpp
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@ -34,9 +34,12 @@
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int main(int argc, char *argv[]) {
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// EmailParser p;
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// p.parse_file("/home/leca/example_email_receipts/читай_город.eml");
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// p.parse_file("/home/leca/example_email_receipts/lenta.eml");
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// p.parse_file("/home/leca/example_email_receipts/magnit.eml");
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// p.parse_file("/home/leca/example_email_receipts/pyaterochka.eml");
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// p.parse_file("/home/leca/example_email_receipts/rzd.eml");
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// p.parse_file("/home/leca/example_email_receipts/russteels.eml");
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// return 0;
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curl_global_init(CURL_GLOBAL_ALL);
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qRegisterMetaType<Check>("Check");
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25
net/net.cpp
25
net/net.cpp
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@ -11,25 +11,38 @@ size_t writeCallback(void* contents, size_t size, size_t nmemb, void* userp) {
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return totalSize;
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}
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size_t write_data(void *buffer, size_t size, size_t nmemb, void *filename) {
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FILE *f = fopen(((std::string *)filename)->c_str(), "w");
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size_t written = fwrite(buffer, size, nmemb, f);
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// size_t write_data_to_file(void *buffer, size_t size, size_t nmemb, void *filename) {
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// FILE *f = fopen(((std::string *)filename)->c_str(), "wb");
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// size_t written = fwrite(buffer, size, nmemb, f);
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fclose(f);
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// fclose(f);
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// return written;
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// }
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size_t write_data(void *ptr, size_t size, size_t nmemb, FILE *stream) {
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size_t written;
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written = fwrite(ptr, size, nmemb, stream);
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return written;
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}
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// size_t write_data(void *buffer, size_t size, size_t nmemb, void *string_buffer) {
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// *(std::string *)string_buffer = std::string((char *)buffer);
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// std::cout << (char*)buffer << std::endl;
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// return size;
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// }
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void Net::get_file(std::string url, std::string filename) {
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CURL *handle = curl_easy_init();
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curl_easy_setopt(handle, CURLOPT_URL, url.c_str());
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FILE *f = fopen(filename.c_str(), "wb");
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curl_easy_setopt(handle, CURLOPT_WRITEFUNCTION, write_data);
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curl_easy_setopt(handle, CURLOPT_WRITEDATA, &filename);
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curl_easy_setopt(handle, CURLOPT_WRITEDATA, f);
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auto success = curl_easy_perform(handle);
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fclose(f);
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curl_easy_cleanup(handle);
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}
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@ -4,7 +4,7 @@
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#include <string>
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#include <vector>
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size_t write_data(void *buffer, size_t size, size_t nmemb, void *userp);
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size_t write_data_to_file(void *buffer, size_t size, size_t nmemb, void *userp);
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size_t writeCallback(void* contents, size_t size, size_t nmemb, void* userp);
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class Net
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void get_file(std::string url, std::string filename);
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std::string fetch_check_data_from_ofdru(std::string fn, std::string fd, std::string fi, std::string datetime, int operation, int total, std::string captcha);
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void get_captcha_from_ofdru();
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std::string get_data(std::string url);
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};
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#endif // NET_H
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@ -661,7 +661,7 @@
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<context>
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<name>QObject</name>
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<message>
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<location filename="../main.cpp" line="71"/>
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<location filename="../main.cpp" line="74"/>
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<source>Using locale: </source>
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<translation>Using locale: </translation>
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</message>
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@ -637,7 +637,7 @@
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<context>
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<name>QObject</name>
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<message>
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<location filename="../main.cpp" line="71"/>
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<location filename="../main.cpp" line="74"/>
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<source>Using locale: </source>
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<translation>Использую локаль: </translation>
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</message>
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@ -75,7 +75,7 @@ std::string get_application_home_path() {
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std::map<std::string, std::string> get_params_from_string(std::string parametersString) {
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parametersString = boost::regex_replace(parametersString, boost::regex("%26"), "&");
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parametersString = boost::regex_replace(parametersString, boost::regex("%3D"), "=");
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parametersString = boost::regex_replace(parametersString, boost::regex("%3[Dd]"), "=");
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std::vector<std::string> parameters = split(parametersString, "&");
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@ -352,15 +352,13 @@ void generate_qr_code(std::string data) {
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#endif // ifdef BUILD_OFD_BINARYEYE_SCAN
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#ifdef BUILD_EMAIL_MODE
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std::vector<std::string> read_file(std::string path) {
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std::ifstream stream(path);
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std::vector<std::string> lines;
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std::string buffer;
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while(getline(stream, buffer)) {
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lines.push_back(buffer);
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}
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stream.close();
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return lines;
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std::string read_file(std::string &path) {
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std::ifstream ifile(path, std::ios::in | std::ios::binary);
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const unsigned int size = std::filesystem::file_size(path);
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std::string content(size, '\0');
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ifile.read(content.data(), size);
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ifile.close();
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return content;
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}
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#endif // ifdef BUILD_EMAIL_MODE
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@ -50,6 +50,6 @@ std::string get_local_ip_address();
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void fetch_and_download_modules();
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#ifdef BUILD_EMAIL_MODE
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std::vector<std::string> read_file(std::string path);
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std::string read_file(std::string &path);
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#endif
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#endif // UTILS_H
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