使用curl库进行HTTP上传

把前段时间写的curl库下载和上传测试函数转移到虚拟机的Linux环境下，用codelite编译，运行，没发现有啥问题。把我给乐呵得~

 

上传函数如下：

//重写把数据读入上传数据流函数 size_t read_file(void* buff, size_t size, size_t nmemb, void* userp) { size_t sizes = fread(buff, size, nmemb, (FILE *)userp); return sizes; } int HTTP_file::upload_file(const char* url, const char* file_name) { if ("" == url || "" == file_name) { std::cout << "url地址或文件名为空,操作失败!" << std::endl; return -1; } CURLcode res; //easy_handle定义的一些错误码 //初始化libcurl res = curl_global_init(CURL_GLOBAL_ALL); if (res != CURLE_OK) { std::cerr << "init libcurl failed." << std::endl; return -1; } //获取要上传的文件指针 FILE* r_file = fopen(file_name, "rb"); if (0 == r_file) { std::cerr << "the file /" " << file_name << " /"that you will read is not exist" << std::endl; return -1; } CURL* easy_handle; easy_handle = curl_easy_init(); if (0 == easy_handle) { std::cout << "get a easy_handle handle fail!" << std::endl; fclose(r_file); curl_global_cleanup(); curl_easy_cleanup(easy_handle); return -1; } // 获取文件大小 fseek(r_file, 0, 2); int file_size = ftell(r_file); rewind(r_file); curl_easy_setopt(easy_handle, CURLOPT_URL, url); //获取URL地址 curl_easy_setopt(easy_handle, CURLOPT_UPLOAD, TRUE); //告诉easy_handle是做上传操作 curl_easy_setopt(easy_handle, CURLOPT_READFUNCTION, &read_file); //调用重写的读文件流函数 curl_easy_setopt(easy_handle, CURLOPT_READDATA, r_file); //往read_file()函数中传入用户自定义的数据类型 curl_easy_setopt(easy_handle, CURLOPT_INFILE, r_file); //定位作为上传的输入文件 curl_easy_setopt(easy_handle, CURLOPT_INFILESIZE, file_size); //上传的字节数 //执行设置好的操作 res = curl_easy_perform(easy_handle); //获取HTTP错误码 int HTTP_flag = 0; curl_easy_getinfo(easy_handle, CURLINFO_RESPONSE_CODE , &HTTP_flag); //一般清理动作 fclose(r_file); curl_global_cleanup(); curl_easy_cleanup(easy_handle); std::cout << "操作本地文件:" << file_name << "; url:" << url << "."; //检测HTTP错误码和执行操作结果 if ((0 != check_error(HTTP_flag)) || (CURLE_OK != res)) { std::cout << "失败!" << std::endl; return -1; } else { std::cout << "成功!" << std::endl; return 0; } }