libcurl實現的FTPClient

FTPClient.h

#ifndef FTPClient_H
#define FTPClient_H

#if defined(_MSC_VER) || defined(_WIN32)
#define _CRT_SECURE_NO_WARNINGS
#pragma comment(lib,"libcurld.lib")
#endif

#include <stdio.h>
#include <curl.h>

typedef int(*pfunc_progress_callback)(void *p,
	curl_off_t dltotal,
	curl_off_t dlnow,
	curl_off_t ultotal,
	curl_off_t ulnow);

class FTPClient
{
public:
	FTPClient();
	~FTPClient();
	int upload(const char* ip, const char* username, const char* passwd,
		const char* localpath, const char* remotepath, pfunc_progress_callback pfunc);

};

#endif

FTPClient.cpp

#include "FTPClient.h"

FTPClient::FTPClient()
{
	curl_global_init(CURL_GLOBAL_ALL);
}

FTPClient::~FTPClient()
{
	curl_global_cleanup();
}

int FTPClient::upload(const char* ip,const char* username,const char* passwd,
	const char* localpath, const char* remotepath, pfunc_progress_callback pfunc)
{
	FILE* fp = fopen(localpath,"rb");

#ifdef __GNUC__
	unsigned long long file_size;
	struct stat statbuff;
	stat(localpath, &statbuff);
	file_size = statbuff.st_size;
#elif defined(_MSC_VER) || defined(_WIN32)
	fseek(fp, 0, SEEK_END);
	__int64 file_size = _ftelli64(fp);
	rewind(fp);
#endif

	CURL *easy_handle = curl_easy_init();//不能在多線程中共享這個句柄
	char url[MAX_PATH];
	sprintf(url, "ftp://%s:%s@%s/%s", username, passwd, ip, remotepath);
	curl_easy_setopt(easy_handle, CURLOPT_UPLOAD, 1L);
	curl_easy_setopt(easy_handle, CURLOPT_URL, url);
	curl_easy_setopt(easy_handle, CURLOPT_READDATA, fp);
	curl_easy_setopt(easy_handle, CURLOPT_INFILESIZE_LARGE, file_size);

	if (pfunc)
	{
		curl_easy_setopt(easy_handle, CURLOPT_NOPROGRESS, 0);
		//curl_easy_setopt(easy_handle, CURLOPT_XFERINFODATA, &someData);//可以爲下面的回調函數設置參數
		curl_easy_setopt(easy_handle, CURLOPT_XFERINFOFUNCTION, pfunc);
	}
	CURLcode ret;
	ret = curl_easy_perform(easy_handle);
	fclose(fp);

	return ret;
}

測試代碼main.cpp:

#include <stdio.h>
#include "FTPClient.h"

int progressCallback(void *p,
	curl_off_t dltotal,
	curl_off_t dlnow,
	curl_off_t ultotal,
	curl_off_t ulnow)
{
	printf("已上傳：%%%g\n", ((double)ulnow / ultotal) * 100);
	return 0;
}

int main()
{
	FTPClient ftp;
	char* localpath = "F:\\song\\軟件備份\\cn_windows_10_business_editions_version_1903_updated_july_2019_x64_dvd_68b4eeaa.iso";
	char* remotepath = "ftpinput/cn_windows_10_business_editions_version_1903_updated_july_2019_x64_dvd_68b4eeaa.iso";
	int ret = ftp.upload("222.18.149.196","user1","user1", localpath, remotepath, progressCallback);
	if (ret == 0)
		printf("上傳成功\n");
	else
		printf("上傳失敗，錯誤碼：%d\n", ret);

	getchar();
	return 0;
}