brainlet-client/http.h

// Copyright (c) 2021 hiimgoodpack
// Permission is hereby granted, free of charge, to any person obtaining a copy of
// this software and associated documentation files (the "Software"), to deal in
// the Software without restriction, including without limitation the rights to
// use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
// of the Software, and to permit persons to whom the Software is furnished to do
// so, subject to the following conditions:
// The above copyright notice and this permission notice shall be included in all
// copies or substantial portions of the Software.
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
// SOFTWARE.

#ifndef HTTP_H
#define HTTP_H

#include <string>
#include <curl/curl.h>
#include <stdexcept>
#include <cstdint>

namespace Http {
	class Error : public std::runtime_error {
		public:
			using runtime_error::runtime_error;
	};

	class Request {
		private:
			CURL* handle;
			std::string url;
			std::string postFields;

			static std::size_t write(void* buffer, std::size_t blocks, std::size_t blockSize, std::string* result);

		public:
			std::string buffer;
			long int status;

			Request(const std::string& url);
			void setPostFields(std::string fields);
			void perform();
			~Request();
	};
}

#endif

#if defined(HTTP_IMPLEMENTATION) && !defined(HTTP_IMPLEMENTED)
#define HTTP_IMPLEMENTED

namespace Http {
	Request::Request(const std::string& newUrl) : url(newUrl) {
		handle = curl_easy_init();

		curl_easy_setopt(handle, CURLOPT_URL, url.c_str());
		curl_easy_getinfo(handle, CURLINFO_RESPONSE_CODE, &status);

		curl_easy_setopt(handle, CURLOPT_WRITEFUNCTION, write);
		curl_easy_setopt(handle, CURLOPT_WRITEDATA, &buffer);
	}
	std::size_t Request::write(void* buffer, std::size_t blocks, std::size_t blockSize, std::string* result) {
		const std::size_t size = blocks * blockSize;
		result->append((char*)buffer, size);
		return size;
	}
	void Request::setPostFields(std::string newFields) {
		postFields = newFields;
		curl_easy_setopt(handle, CURLOPT_POSTFIELDS, postFields.c_str());
		curl_easy_setopt(handle, CURLOPT_POSTFIELDSIZE, postFields.length()+1);
	}
	void Request::perform() {
		CURLcode code = curl_easy_perform(handle);
		if (code != CURLE_OK)
			throw Error(curl_easy_strerror(code));
	}
	Request::~Request() {
		curl_easy_cleanup(handle);
	}
}
#endif