c++ http 图片上传
时间: 2023-10-10 08:04:23 浏览: 45
要实现HTTP图片上传,可以使用C++中的libcurl库。下面是一个简单的上传图片的示例代码:
```c++
#include <curl/curl.h>
#include <iostream>
#include <fstream>
int main()
{
CURL *curl;
CURLcode res;
struct curl_httppost *formpost = NULL;
struct curl_httppost *lastptr = NULL;
struct curl_slist *headerlist = NULL;
static const char buf[] = "Expect:";
curl_global_init(CURL_GLOBAL_ALL);
curl_formadd(&formpost, &lastptr,
CURLFORM_COPYNAME, "image",
CURLFORM_FILE, "image.jpg",
CURLFORM_CONTENTTYPE, "image/jpeg",
CURLFORM_END);
curl = curl_easy_init();
headerlist = curl_slist_append(headerlist, buf);
if (curl)
{
curl_easy_setopt(curl, CURLOPT_URL, "http://example.com/upload");
curl_easy_setopt(curl, CURLOPT_HTTPHEADER, headerlist);
curl_easy_setopt(curl, CURLOPT_HTTPPOST, formpost);
res = curl_easy_perform(curl);
if (res != CURLE_OK)
std::cerr << "curl_easy_perform() failed: " << curl_easy_strerror(res) << std::endl;
curl_easy_cleanup(curl);
curl_formfree(formpost);
curl_slist_free_all(headerlist);
}
curl_global_cleanup();
return 0;
}
```
这个示例代码使用了`curl_formadd`函数添加了一个上传的图片(名称为`image`,文件名为`image.jpg`,类型为`image/jpeg`),然后设置了URL为上传的地址,HTTP头部信息中添加了`Expect:`,使用`curl_easy_perform`函数执行HTTP请求。
可以根据自己的需求修改代码中的图片文件名、上传地址等信息。