linux下上传照片和视频

---

前言

    最近的项目中要把生成的图片和视频上传的云平台。

一、libcurl开源库

    libcurl作为是一个多协议的便于客户端使用的URL传输库，基于C语言，提供C语言的API接口，支持DICT, FILE, FTP, FTPS, Gopher, HTTP, HTTPS, IMAP, IMAPS, LDAP, LDAPS, POP3, POP3S, RTMP, RTSP, SCP, SFTP, SMTP, SMTPS, Telnet and TFTP这些协议，同时支持使用SSL证书的安全文件传输：HTTP POST, HTTP PUT, FTP 上传, 基于HTTP形式的上传、代理、Cookies、用户加密码的认证等多种应用场景。

二、上传图像和视频的代码

int uploadfile(char *url, char *file_path,  char * cookie_path, char ** outdata,int file_type)
{
	CURL *curl;
	CURLcode rcode;
	char *filedata = NULL;
	int fileLen;
	int ret;

	CURLcode r = CURLE_GOT_NOTHING;

	fileLen = file_size(file_path, &filedata);
	printf("fileLen = %d \n", fileLen);
	if (fileLen <= 0) {
		if (filedata) {
			free(filedata);
		}
		return -1;
	}
	curl = curl_easy_init();
	if (NULL == curl)
		return 0;

	//设置url
	curl_easy_setopt(curl, CURLOPT_URL, url);
	//设置超时时间
	curl_easy_setopt(curl, CURLOPT_TIMEOUT, 10);
	//设置http以post方式请求
	curl_easy_setopt(curl, CURLOPT_POST, 1L);                //POST

	  struct curl_slist *headers=NULL;
	  if (file_type ==  FIlE_IMAGE) {
		  headers = curl_slist_append(headers, "Content-Type: image/jpeg");
	  }
	  else if (file_type ==  FILE_VIDEO) {
		  headers = curl_slist_append(headers, "Content-Type: video/mpeg4");
	  }

	  headers = curl_slist_append(headers, "Expect:");
	  //set headers
	   curl_easy_setopt(curl, CURLOPT_HTTPHEADER, headers);

	struct MemoryStruct chunk;
	chunk.memory = (char *)malloc(sizeof(char));  /* will be grown as needed by the realloc above */
	chunk.size = 0;    /* no data at this point */
	curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, PostCallBackData);
	curl_easy_setopt(curl, CURLOPT_WRITEDATA, (void *)&chunk);

	curl_easy_setopt(curl, CURLOPT_VERBOSE, 1L);            //开启/关闭 打印调试详细信息模式
	if (cookie_path) {
		curl_easy_setopt(curl, CURLOPT_COOKIEFILE, cookie_path);
		curl_easy_setopt(curl, CURLOPT_COOKIEJAR, cookie_path); 
	}

	curl_easy_setopt(curl,CURLOPT_POSTFIELDS,filedata);
	curl_easy_setopt(curl, CURLOPT_POSTFIELDSIZE, fileLen);

	//发送数据
	curl_easy_setopt(curl, CURLOPT_SSL_VERIFYHOST, 0L);
	r = curl_easy_setopt(curl, CURLOPT_SSL_VERIFYPEER, 0L);
	if (r != CURLE_OK) {
		if (chunk.memory)
			free(chunk.memory);
		printf("curl post CURLOPT_SSL_VERIFYPEER failed :%s\n",curl_easy_strerror(r));
		goto EXIT;
	}
	rcode = curl_easy_perform(curl);

	if (rcode != CURLE_OK)
	{
		*outdata = NULL;
		if (chunk.memory)
			free(chunk.memory);
		printf("curl_easy_perform() failed，error code is:%s\n", curl_easy_strerror(rcode));
	} else {
		*outdata = chunk.memory;
	}
EXIT:
	curl_easy_cleanup(curl);
	if (filedata) {
		free(filedata);
	}
	if (headers) {
		free(headers);
	}
	return 1;
}

static size_t PostCallBackData(void *buffer, size_t size, size_t nmemb, void *user_p)
{
	size_t realsize = size * nmemb;
	struct MemoryStruct *mem = (struct MemoryStruct *)user_p;

	mem->memory = (char *)realloc(mem->memory, mem->size + realsize + 1);
	if(mem->memory == NULL) {
		/* out of memory! */
		printf("not enough memory (realloc returned NULL)\n");
		return 0;
	}

	memcpy(&(mem->memory[mem->size]), buffer, realsize);
	mem->size += realsize;
	mem->memory[mem->size] = 0;

	return realsize;
}

一开始主要是没有设置Content-Type，对http协议不是很了解，以为只要把文件的路径和格式传进去就ok了

https://www.runoob.com/http/http-content-type.html

这里有Content-Type对照表的格式，大家想上传别的格式的内容，只要更改Content-Type的内容就可以了。