利用curl库在嵌入式Linux平台实现下载文件的简单用法

 
1.如何移植curl库：略

2.调用API：

size_t ezDownloadWriteData(void *ptr, size_t size, size_t nmemb, void *stream)

{

    return fwrite(ptr, size, nmemb, stream);

}

int ezDownloadFunc(char *url, char *path)

{

	CURL *curl;

	FILE *ez_fp=NULL;  
	curl_global_init(CURL_GLOBAL_ALL);

	curl=curl_easy_init();

	if(curl == NULL){

		printf("curl_easy_init error\n");

		goto end;

	}
	if((ez_fp=fopen(path,"w"))==NULL){

		printf("create file error\n");

		goto end;

	}
	curl_easy_setopt(curl, CURLOPT_URL, url);

	curl_easy_setopt(curl, CURLOPT_WRITEDATA, ez_fp);

	curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, ezDownloadWriteData);

	if(curl_easy_perform(curl) != CURLE_OK){

		printf("curl_easy_perform error\n");

		goto end;

	}else{

		printf("download ok\n");

		return 1;

	}
end:

	curl_easy_cleanup(curl);

	curl_global_cleanup();

	if(ez_fp)

		fclose(ez_fp);

	return 0;

}
 
3.调用：

 ezDownloadFunc("http://192.168.4.2/index.html","/tmp/index.html");