使用curl 命令上传下载FTP

CURL命令
1、列出ftp服务器上的目录列表：
curl ftp://www.xxx.com/ --user name:passwd
curl ftp://www.xxx.com/ –u name:passwd #简洁写法
curl ftp://name:[email protected] #简洁写法2

2、只列出目录，不显示进度条
curl ftp://www.xxx.com –u name:passwd -s

3、下载一个文件：
curl ftp://www.xxx.com/size.zip –u name:passwd -o size.zip

4、上载一个文件：
curl –u name:passwd -T size.mp3 ftp://www.xxx.com/mp3/

5、从服务器上删除文件（使用curl传递ftp协议的DELE命令）:
curl –u name:passwd ftp://www.xxx.com/ -X 'DELE mp3/size.mp3'

6、另外curl不支持递归下载，不过可以用数组方式下载文件，比如我们要下载1-10.gif连续命名的文件：
curl –u name:passwd ftp://www.xxx.com/img/[1-10].gif –O #O字母大写

7、要连续下载多个文件：
curl –u name:passwd ftp://www.xxx.com/img/[one,two,three].jpg –O #O字母大写

# 上传 aa.txt 文件到 FTP 指定目录下（目录必须以"/"结尾）, 并以原文件名命名保存
curl ftp://192.168.0.100/aaDir/ -u "user:passwd" -T "aa.txt"

# 上传 aa.txt 文件到 FTP 指定目录下, 并以 bb.txt 命名保存
curl ftp://192.168.0.100/aaDir/bb.txt -u "user:passwd" -T "aa.txt"

# 同时上传多个文件
curl ftp://192.168.0.100/aaDir/ -u "user:passwd" -T "{aa.txt,bb.txt}"

# 下载 FTP 指定文件 /aaDir/aa.txt, 以原文件名命名保存到当前目录
curl ftp://192.168.0.100/aaDir/aa.txt -u "user:passwd" -O

# 下载 FTP 指定文件 /aaDir/aa.txt, 以 bb.txt 命名保存
curl ftp://192.168.0.100/aaDir/aa.txt -u "user:passwd" -o bb.txt

单条命令: curl [-options] <ftpUrl> -X "FTP命令"
多条命令: curl [-options] <ftpUrl> -Q "FTP命令" -Q "FTP命令"

# # 创建文件夹, 在 /aaDir/ 目录（目录必须以"/"结尾）下创建 bbDir 文件夹 #curl -u "user:passwd" ftp://192.168.0.100/aaDir/ -X "MKD bbDir" # 删除文件夹, 删除 /aaDir/ 目录下的 bbDir 文件夹（文件夹必须为空） #curl -u "user:passwd" ftp://192.168.0.100/aaDir/ -X "RMD bbDir" # 删除文件, 删除 /aaDir/ 目录下的 aa.txt 文件 #curl -u "user:passwd" ftp://192.168.0.100/aaDir/ -X "DELE aa.txt" # 重命名, 重命名需要连续执行两条命令, 使用两个 -Q 参数连续执行两条命令（必须先 RNFR, 后 RNTO） #curl -u "user:passwd" ftp://192.168.0.100/ -Q "RNFR OldPath" -Q "RNTO NewPath"

利用libcurl编写程序与ftp服务器通信，进行文件上传或下载。其实在命令行下直接使用curl命令就可以完成这些功能，但是需要获取上传下载行为的状态以便更好地控制.

//ftp-manager.h

#ifndef _FTP_MANAGER_H_
#define _FTP_MANAGER_H_
 
/*FTP OPERATION CODE*/
typedef enum FTP_STATE
{
	FTP_UPLOAD_SUCCESS,
	FTP_UPLOAD_FAILED,
	FTP_DOWNLOAD_SUCCESS,
	FTP_DOWNLOAD_FAILED 
}FTP_STATE;
 
/*FTP OPERATIONS OPTIONS*/
typedef struct FTP_OPT
{
	char *url;		/*url of ftp*/
	char *user_key;		/*username:password*/
	char *file;		/*filepath*/
}FTP_OPT;
 
#ifdef __cplusplus
	extern "C" {
#endif
 
/*upload file to ftp server*/
FTP_STATE ftp_upload(const FTP_OPT ftp_option);
 
/*download file from ftp server*/
FTP_STATE ftp_download(const FTP_OPT ftp_option);
 
#ifdef __cplusplus
	}
#endif
 
#endif

//ftp-manager.c

#include <stdio.h>
#include <stdlib.h>
#include <curl/curl.h>
 
#include "ftp-manager.h"
 
/*****************util api******************/
int get_file_size(FILE *file)
{
	int size = 0;
	fseek(file, 0L, SEEK_END);
	size = ftell(file);
	fseek(file, 0L, SEEK_SET);
	return size;
}
 
/******************curl api****************/
CURL *curl_init()
{
	curl_global_init(CURL_GLOBAL_DEFAULT); 
	CURL *curl = curl_easy_init();
	if(NULL == curl)
	{
		fprintf(stderr, "Init curl failed.\n");
		exit(1);
	}
	return curl;
}
 
void curl_set_upload_opt(CURL *curl, const char *url, const char *user_key, FILE *file)
{
	curl_easy_setopt(curl, CURLOPT_URL, url);
	curl_easy_setopt(curl, CURLOPT_USERPWD, user_key);
	curl_easy_setopt(curl, CURLOPT_READDATA, file);	
	curl_easy_setopt(curl, CURLOPT_UPLOAD, 1);
	curl_easy_setopt(curl, CURLOPT_INFILESIZE, get_file_size(file));
	curl_easy_setopt(curl, CURLOPT_FTP_CREATE_MISSING_DIRS, 1);
//	curl_easy_setopt(curl, CURLOPT_VERBOSE, 1);
}
 
void curl_set_download_opt(CURL *curl, const char *url, const char *user_key, FILE *file)
{
	curl_easy_setopt(curl, CURLOPT_URL, url);
	curl_easy_setopt(curl, CURLOPT_USERPWD, user_key);
	curl_easy_setopt(curl, CURLOPT_WRITEDATA, file);
//	curl_easy_setopt(curl, CURLOPT_VERBOSE, 1);
}
 
void curl_exit(CURL *curl)
{
	curl_easy_cleanup(curl);
	curl_global_cleanup(); 
}
 
CURLcode curl_perform(CURL *curl)
{
	CURLcode ret = curl_easy_perform(curl);
	if(ret != 0)
	{
		fprintf(stderr, "Perform curl failed.\n");
		curl_exit(curl);
		exit(1);
	}
	return ret;
}
 
/****************ftp upload & download api******************/
FTP_STATE ftp_upload(const FTP_OPT ftp_option)
{
	FTP_STATE state;
	CURL *curl;;
	FILE *fp = fopen(ftp_option.file, "r");
	if(NULL == fp)
	{
		fprintf(stderr, "Open file failed at %s:%d\n", __FILE__, __LINE__);
		return FTP_UPLOAD_FAILED;
	}
 
	curl = curl_init();
	curl_set_upload_opt(curl, ftp_option.url, ftp_option.user_key, fp);
	if(CURLE_OK == curl_perform(curl))
		state = FTP_UPLOAD_SUCCESS;
	else
		state = FTP_UPLOAD_FAILED;
 
	curl_exit(curl);
	fclose(fp);
	return state;
}
 
FTP_STATE ftp_download(const FTP_OPT ftp_option)
{
	FTP_STATE state;
	CURL *curl;
	FILE *fp = fopen(ftp_option.file, "w");
	if(NULL == fp)
	{
		fprintf(stderr, "Open file failed at %s:%d\n", __FILE__, __LINE__);
		return FTP_UPLOAD_FAILED;
	}
 
	curl = curl_init();
	curl_set_download_opt(curl, ftp_option.url, ftp_option.user_key, fp);
	if(CURLE_OK == curl_perform(curl))
		state = FTP_DOWNLOAD_SUCCESS;
	else
		state = FTP_DOWNLOAD_FAILED;
 
	curl_exit(curl);
	fclose(fp);
	return state;
}

//test.c

#include <stdio.h>
 
#include "ftp-manager.h"
 
int main()
{
	FTP_OPT ftp_opt;
	ftp_opt.url = "ftp://127.0.0.1//var/ftp/upload.txt";
	ftp_opt.user_key = "xxx:xxx";
	ftp_opt.file = "/home/xxx/project/ftpManager/upload.txt";
 
	if(FTP_UPLOAD_SUCCESS == ftp_upload(ftp_opt))
		printf("Upload success.\n");
	else
		printf("Upload failed.\n");
 
	ftp_opt.url = "ftp://127.0.0.1//var/ftp/download.txt";
	ftp_opt.file = "/home/xxx/project/ftpManager/download.txt";
 
	if(FTP_DOWNLOAD_SUCCESS == ftp_download(ftp_opt))
		printf("Download success.\n");
	else
		printf("Download failed.\n");
 
	return 0;
}

使用curl 命令上传下载FTP

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