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#include "tgbot/net/HttpParser.h"
#include "tgbot/tools/StringTools.h"
#include <boost/algorithm/string.hpp>
#include <cstddef>
#include <string>
#include <vector>
#include <unordered_map>
using namespace std;
using namespace boost;
namespace TgBot {
string HttpParser::generateRequest(const Url& url, const vector<HttpReqArg>& args, bool isKeepAlive) const {
string result;
if (args.empty()) {
result += "GET ";
} else {
result += "POST ";
}
result += url.path;
result += url.query.empty() ? "" : "?" + url.query;
result += " HTTP/1.1\r\n";
result += "Host: ";
result += url.host;
result += "\r\nConnection: ";
if (isKeepAlive) {
result += "keep-alive";
} else {
result += "close";
}
result += "\r\n";
if (args.empty()) {
result += "\r\n";
} else {
string requestData;
string bondary = generateMultipartBoundary(args);
if (bondary.empty()) {
result += "Content-Type: application/x-www-form-urlencoded\r\n";
requestData = generateWwwFormUrlencoded(args);
} else {
result += "Content-Type: multipart/form-data; boundary=";
result += bondary;
result += "\r\n";
requestData = generateMultipartFormData(args, bondary);
}
result += "Content-Length: ";
result += std::to_string(requestData.length());
result += "\r\n\r\n";
result += requestData;
}
return result;
}
string HttpParser::generateMultipartFormData(const vector<HttpReqArg>& args, const string& bondary) const {
string result;
for (const HttpReqArg& item : args) {
result += "--";
result += bondary;
result += "\r\nContent-Disposition: form-data; name=\"";
result += item.name;
if (item.isFile) {
result += "\"; filename=\"" + item.fileName;
}
result += "\"\r\n";
if (item.isFile) {
result += "Content-Type: ";
result += item.mimeType;
result += "\r\n";
}
result += "\r\n";
result += item.value;
result += "\r\n";
}
result += "--" + bondary + "--\r\n";
return result;
}
string HttpParser::generateMultipartBoundary(const vector<HttpReqArg>& args) const {
string result;
for (const HttpReqArg& item : args) {
if (item.isFile) {
while (result.empty() || item.value.find(result) != string::npos) {
result += StringTools::generateRandomString(4);
}
}
}
return result;
}
string HttpParser::generateWwwFormUrlencoded(const vector<HttpReqArg>& args) const {
string result;
bool firstRun = true;
for (const HttpReqArg& item : args) {
if (firstRun) {
firstRun = false;
} else {
result += '&';
}
result += StringTools::urlEncode(item.name);
result += '=';
result += StringTools::urlEncode(item.value);
}
return result;
}
string HttpParser::generateResponse(const string& data, const string& mimeType, unsigned short statusCode, const string& statusStr, bool isKeepAlive) const {
string result;
result += "HTTP/1.1 ";
result += std::to_string(statusCode);
result += ' ';
result += statusStr;
result += "\r\nContent-Type: ";
result += mimeType;
result += "\r\nContent-Length: ";
result += std::to_string(data.length());
result += "\r\nConnection: ";
if (isKeepAlive) {
result += "keep-alive";
} else {
result += "close";
}
result += "\r\n\r\n";
result += data;
return result;
}
unordered_map<string, string> HttpParser::parseHeader(const string& data, bool isRequest) const {
unordered_map<string, string> headers;
std::size_t lineStart = 0;
std::size_t lineEnd = 0;
std::size_t lineSepPos = 0;
std::size_t lastLineEnd = string::npos;
while (lastLineEnd != lineEnd) {
lastLineEnd = lineEnd;
bool isFirstLine = lineEnd == 0;
if (isFirstLine) {
if (isRequest) {
lineSepPos = data.find(' ');
lineEnd = data.find("\r\n");
headers["_method"] = data.substr(0, lineSepPos);
headers["_path"] = data.substr(lineSepPos + 1, data.find(' ', lineSepPos + 1) - lineSepPos - 1);
} else {
lineSepPos = data.find(' ');
lineEnd = data.find("\r\n");
headers["_status"] = data.substr(lineSepPos + 1, data.find(' ', lineSepPos + 1) - lineSepPos - 1);
}
} else {
lineStart = lineEnd;
lineStart += 2;
lineEnd = data.find("\r\n", lineStart);
lineSepPos = data.find(':', lineStart);
if (lastLineEnd == lineEnd || lineEnd == string::npos) {
break;
}
headers[data.substr(lineStart, lineSepPos - lineStart)] = trim_copy(data.substr(lineSepPos + 1, lineEnd - lineSepPos - 1));
}
}
return headers;
}
string HttpParser::extractBody(const string& data) const {
std::size_t headerEnd = data.find("\r\n\r\n");
if (headerEnd == string::npos) {
return data;
}
headerEnd += 4;
return data.substr(headerEnd);
}
}
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