/**
* Relational pipes
* Copyright © 2020 František Kučera (Frantovo.cz, GlobalCode.info)
*
* This program 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 3 of the License.
*
* This program 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 this program. If not, see <http://www.gnu.org/licenses/>.
*/
#pragma once
#include <memory>
#include <string>
#include <vector>
#include <codecvt>
#include <regex>
#include <stdexcept>
#include <curl/curl.h>
#include <relpipe/common/type/typedefs.h>
#include <relpipe/reader/TypeId.h>
#include <relpipe/reader/handlers/RelationalReaderStringHandler.h>
#include <relpipe/reader/handlers/AttributeMetadata.h>
#include <relpipe/writer/Factory.h>
#include <relpipe/writer/TypeId.h>
#include <relpipe/cli/RelpipeCLIException.h>
#include "Configuration.h"
namespace relpipe {
namespace tr {
namespace http {
class HTTPHandler : public relpipe::reader::handlers::RelationalReaderStringHandler {
private:
std::wstring_convert<codecvt_utf8<wchar_t>> convertor; // TODO: support also other encodings.
shared_ptr<relpipe::writer::RelationalWriter> relationalWriter;
Configuration configuration;
std::vector<relpipe::reader::handlers::AttributeMetadata> currentReaderMetadata;
std::vector<relpipe::writer::AttributeMetadata> currentWriterMetadata;
size_t currentAttributeIndex = 0;
size_t currentRecordNumber = 1;
void writeCallback(std::string value) {
// TODO: write this attribute even if this method was not called
// TODO: support also binary data or other encodings, not only UTF-8 text
relationalWriter->writeAttribute(convertor.from_bytes(value));
}
static uint writeCurlCallback(char* buffer, size_t size, size_t nmemb, HTTPHandler* instance) {
size_t r = size * nmemb;
instance->writeCallback(std::string(buffer, r));
return r;
}
public:
HTTPHandler(shared_ptr<relpipe::writer::RelationalWriter> relationalWriter, Configuration configuration) : relationalWriter(relationalWriter), configuration(configuration) {
}
virtual ~HTTPHandler() {
}
void startRelation(relpipe::common::type::StringX name, std::vector<relpipe::reader::handlers::AttributeMetadata> attributes) override {
relationalWriter->startRelation(name + L"_curl_info",{
{L"name", relpipe::writer::TypeId::STRING},
{L"value", relpipe::writer::TypeId::STRING}
}, true);
relationalWriter->writeAttribute(L"curl version");
relationalWriter->writeAttribute(convertor.from_bytes(curl_version()));
relationalWriter->startRelation(name + L"_curl_response",{
{L"url", relpipe::writer::TypeId::STRING},
{L"body", relpipe::writer::TypeId::STRING},
{L"response_code", relpipe::writer::TypeId::INTEGER}
}, true);
}
void attribute(const relpipe::common::type::StringX& value) override {
relationalWriter->writeAttribute(value);
std::string url = convertor.to_bytes(value);
relpipe::common::type::Integer responseCode = 0;
CURL* curl = curl_easy_init();
curl_easy_setopt(curl, CURLOPT_URL, url.c_str());
curl_easy_setopt(curl, CURLOPT_WRITEDATA, this);
curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, writeCurlCallback);
curl_easy_perform(curl);
curl_easy_getinfo(curl, CURLINFO_RESPONSE_CODE, &responseCode);
curl_easy_cleanup(curl);
relationalWriter->writeAttribute(&responseCode, typeid (responseCode));
}
void endOfPipe() {
}
};
}
}
}