libcurl 上传文件至 web服务器

<?php

if ($_FILES["file"]["error"] > 0)
{
echo "Return Code: " . $_FILES["file"]["error"] . "<br />";
}
else
{
echo "Upload: " . $_FILES["file"]["name"] . "<br />";
echo "Type: " . $_FILES["file"]["type"] . "<br />";
echo "Size: " . ($_FILES["file"]["size"] / 1024) . " Kb<br />";
echo "Temp file: " . $_FILES["file"]["tmp_name"] . "<br />";

if (file_exists("./" . $_FILES["file"]["name"]))
{
echo $_FILES["file"]["name"] . " already exists. ";
}
else
{
move_uploaded_file($_FILES["file"]["tmp_name"],
"./" . $_FILES["file"]["name"]);
echo "Stored in: " . "/" . $_FILES["file"]["name"];
}
}
?>

// libCur1.cpp : Defines the entry point for the console application.
//

#include "stdafx.h"
#include <stdio.h>
#include "curl/curl.h"

#define MAX_BUFF_LEN 1048576 /*1M*/
#define POST_URL "http://10.10.1.4/d/upload.php"

int get_file_size(char *filename)
{
FILE* fp = NULL;
int nFileLen = 0;

fp = fopen(filename, "rb");

if (fp == NULL)
{
return 0;
}

fseek(fp,0,SEEK_END); //定位到文件末
nFileLen = ftell(fp); //文件长度
return nFileLen;
}

int http_post_file(const char *url, const char *filename)
{
CURL *curl = NULL;
CURLcode res;

struct curl_httppost *post=NULL;
struct curl_httppost *last=NULL;
struct curl_slist *headerlist=NULL;

if(filename == NULL || url == NULL)
return -1;

printf("URL: %s\n", url);
printf("filename: %s\n", filename);

/* Add simple file section */
if( curl_formadd(&post, &last, CURLFORM_COPYNAME, "file",
CURLFORM_FILE, filename, CURLFORM_END) != 0)
{
fprintf(stderr, "curl_formadd error.\n");
return -1;
}

/* Fill in the submit field too, even if this is rarely needed */
curl_formadd(&post, &last,
CURLFORM_COPYNAME, "submit",
CURLFORM_COPYCONTENTS, "OK",
CURLFORM_END);

//curl_global_init(CURL_GLOBAL_ALL);
curl = curl_easy_init();
if(curl == NULL)
{
fprintf(stderr, "curl_easy_init() error.\n");
curl_formfree(post);
return -1;
}

curl_easy_setopt(curl, CURLOPT_HEADER, 0);
curl_easy_setopt(curl, CURLOPT_URL, url); /*Set URL*/
curl_easy_setopt(curl, CURLOPT_HTTPPOST, post);
int timeout = 5;
curl_easy_setopt(curl, CURLOPT_TIMEOUT, timeout);
curl_easy_setopt(curl, CURLOPT_SSL_VERIFYPEER, 0);
curl_easy_setopt(curl, CURLOPT_SSL_VERIFYHOST, 1);

res = curl_easy_perform(curl);
if(res != CURLE_OK)
{
fprintf(stderr, "curl_easy_perform[%d] error.\n", res);
curl_formfree(post);
return -1;
}

curl_easy_cleanup(curl);

return 0;
}

int main()
{

char sFilePath[128]="d:\\20130828131421113.jpg";

//Check File Size
if(get_file_size(sFilePath) >= MAX_BUFF_LEN)
{
fprintf(stderr, "File Size is Big!\n");
return -1;
}

//POST File
http_post_file(POST_URL, sFilePath);

getchar();

return 0;
}