libcurl8.9.1 上传mp4文件

在postman 中使用POST----》body----》form-data

使用libcurl提交代码方式：

结构体：

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#define MAX_ARRAY_SIZE      5*1024*1024

struct SMART_DATA_CACHE
{
    char* buf;
    long dwTotalLen;

    SMART_DATA_CACHE()
    {
        dwTotalLen = 0;
        buf = nullptr;
        while (!buf) {
            try {
                buf = new char[MAX_ARRAY_SIZE];
            }
            catch (...) {}
        }
        memset(buf, 0x00, MAX_ARRAY_SIZE);
    }
    ~SMART_DATA_CACHE()
    {
        if (buf) {
            delete[] buf;
            buf = nullptr;
            dwTotalLen = 0;
        }
    }
};

接收回调：

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size_t ManageCurl::http_recv_cb(void* ptr, size_t size, size_t nmemb, void* stream)
{
	SMART_DATA_CACHE* pDataBuf = (SMART_DATA_CACHE*)stream;
	if (pDataBuf) {
		if (pDataBuf->buf) {
			if (pDataBuf->dwTotalLen + size * nmemb < MAX_ARRAY_SIZE) {
				memcpy(pDataBuf->buf + pDataBuf->dwTotalLen, ptr, size * nmemb);
				pDataBuf->dwTotalLen += size * nmemb;
			}
		}
	}

	return size * nmemb;
}

调用：

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CURL* curl = curl_easy_init();
if (curl) {
	struct curl_slist* http_header = NULL;

	/* 填充文件上传字段 */
	curl_mime* form = curl_mime_init(curl);
	curl_mimepart* field = curl_mime_addpart(form);
	curl_mime_name(field, "file");
	curl_mime_filedata(field, "d:\\2024_08_13_11_14_17.991.mp4");//需要注意中文路径

	//http_header = curl_slist_append(http_header, "Expect:");
	//http_header = curl_slist_append(http_header, "User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US) AppleWebKit/534.3 (KHTML, like Gecko) Chrome/6.0.472.63 Safari/534.3");
	http_header = curl_slist_append(http_header, "Charset: UTF-8");
	http_header = curl_slist_append(http_header, "Connection: keep-alive");//保持长连接
	http_header = curl_slist_append(http_header, "Content-Type:multipart/form-data");//保持长连接

	curl_easy_setopt(curl, CURLOPT_HTTPHEADER, http_header);//修改协议头
	curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, http_recv_cb);//设置接收回调
	curl_easy_setopt(curl, CURLOPT_WRITEDATA, (void*)&stRecv);//设置设置参数
	curl_easy_setopt(curl, CURLOPT_CONNECTTIMEOUT, 10);//设置连接时的超时时间为5秒
	curl_easy_setopt(curl, CURLOPT_TIMEOUT, nTimeout);//超时秒为单位
	curl_easy_setopt(curl, CURLOPT_URL, pUrl);//指定URL
	curl_easy_setopt(curl, CURLOPT_MIMEPOST, form);
	curl_easy_setopt(curl, CURLOPT_SSL_VERIFYHOST, 0);
	curl_easy_setopt(curl, CURLOPT_SSL_VERIFYPEER, 0);
	CURLcode res = curl_easy_perform(curl);//执行

	long nRet = 0;
	CURLcode codeRet = curl_easy_getinfo(curl, CURLINFO_RESPONSE_CODE, &nRet);
	if (codeRet == CURLE_OK && nRet == 200) {
		bResult = true;
	}

	curl_easy_cleanup(curl);
	curl_mime_free(form);
	curl_slist_free_all(http_header);
}

这里需要注意：

Content-Type为 multipart/form-data

2.curl_easy_setopt(curl, CURLOPT_POST, 1L); 不需要指定，所以不需要添加该语句

3.下面这段代码上传不行

curl_easy_setopt(curl, CURLOPT_READFUNCTION, http_read_cb);

curl_easy_setopt(curl, CURLOPT_READDATA, pFile);

curl_easy_setopt(curl, CURLOPT_UPLOAD, 1L);

curl_easy_setopt(curl, CURLOPT_INFILESIZE_LARGE, (curl_off_t)stFileInfo.st_size);

下面这句代码也不行

curl_formadd((curl_httppost**)&formpost,

(curl_httppost**)&lastptr,

CURLFORM_COPYNAME, "File1",

CURLFORM_FILE, "d://进步.txt",

CURLFORM_FILENAME, pUrlName,

CURLFORM_END);