{"id":59673,"date":"2024-10-12T23:53:22","date_gmt":"2024-10-12T15:53:22","guid":{"rendered":"https:\/\/server.hk\/cnblog\/59673\/"},"modified":"2024-10-12T23:53:22","modified_gmt":"2024-10-12T15:53:22","slug":"c%e8%aa%9e%e8%a8%80%e7%b7%a8%e7%a8%8b%e6%8a%80%e5%b7%a7%ef%bc%9a%e5%a6%82%e4%bd%95%e5%b0%87%e6%96%87%e4%bb%b6%e4%bf%9d%e5%ad%98%e5%88%b0%e6%95%b8%e6%93%9a%e5%ba%ab%e4%b8%ad-c%e4%bf%9d%e5%ad%98","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/59673\/","title":{"rendered":"C\u8a9e\u8a00\u7de8\u7a0b\u6280\u5de7\uff1a\u5982\u4f55\u5c07\u6587\u4ef6\u4fdd\u5b58\u5230\u6578\u64da\u5eab\u4e2d (c\u4fdd\u5b58\u6587\u4ef6\u5230\u6578\u64da\u5eab)"},"content":{"rendered":"<h1 id=\"c%e8%aa%9e%e8%a8%80%e7%b7%a8%e7%a8%8b%e6%8a%80%e5%b7%a7%ef%bc%9a%e5%a6%82%e4%bd%95%e5%b0%87%e6%96%87%e4%bb%b6%e4%bf%9d%e5%ad%98%e5%88%b0%e6%95%b8%e6%93%9a%e5%ba%ab%e4%b8%ad-rqiPZdtoNq\">C\u8a9e\u8a00\u7de8\u7a0b\u6280\u5de7\uff1a\u5982\u4f55\u5c07\u6587\u4ef6\u4fdd\u5b58\u5230\u6578\u64da\u5eab\u4e2d<\/h1>\n<p>\u5728\u73fe\u4ee3\u61c9\u7528\u7a0b\u5e8f\u958b\u767c\u4e2d\uff0c\u5c07\u6587\u4ef6\u4fdd\u5b58\u5230\u6578\u64da\u5eab\u4e2d\u662f\u4e00\u500b\u5e38\u898b\u7684\u9700\u6c42\u3002\u7121\u8ad6\u662f\u7528\u6236\u4e0a\u50b3\u7684\u5716\u7247\u3001\u6587\u6a94\u9084\u662f\u5176\u4ed6\u985e\u578b\u7684\u6587\u4ef6\uff0c\u5c07\u9019\u4e9b\u6587\u4ef6\u6709\u6548\u5730\u5b58\u5132\u5728\u6578\u64da\u5eab\u4e2d\u90fd\u80fd\u63d0\u9ad8\u6578\u64da\u7684\u7ba1\u7406\u6548\u7387\u3002\u672c\u6587\u5c07\u63a2\u8a0e\u5982\u4f55\u4f7f\u7528C\u8a9e\u8a00\u5c07\u6587\u4ef6\u4fdd\u5b58\u5230\u6578\u64da\u5eab\u4e2d\uff0c\u4e26\u63d0\u4f9b\u76f8\u95dc\u7684\u793a\u4f8b\u4ee3\u78bc\u3002<\/p>\n<h2 id=\"%e6%96%87%e4%bb%b6%e5%ad%98%e5%84%b2%e7%9a%84%e5%9f%ba%e6%9c%ac%e6%a6%82%e5%bf%b5-rqiPZdtoNq\">\u6587\u4ef6\u5b58\u5132\u7684\u57fa\u672c\u6982\u5ff5<\/h2>\n<p>\u5728\u5c07\u6587\u4ef6\u4fdd\u5b58\u5230\u6578\u64da\u5eab\u4e4b\u524d\uff0c\u6211\u5011\u9700\u8981\u4e86\u89e3\u4e00\u4e9b\u57fa\u672c\u6982\u5ff5\u3002\u901a\u5e38\uff0c\u6587\u4ef6\u53ef\u4ee5\u4ee5\u5169\u7a2e\u65b9\u5f0f\u5b58\u5132\u5728\u6578\u64da\u5eab\u4e2d\uff1a<\/p>\n<ul>\n<li><strong>\u6587\u4ef6\u8def\u5f91\u5b58\u5132\uff1a<\/strong>\u50c5\u5c07\u6587\u4ef6\u7684\u8def\u5f91\u5b58\u5132\u5728\u6578\u64da\u5eab\u4e2d\uff0c\u5be6\u969b\u6587\u4ef6\u4ecd\u7136\u4fdd\u5b58\u5728\u6587\u4ef6\u7cfb\u7d71\u4e2d\u3002<\/li>\n<li><strong>BLOB\uff08Binary Large Object\uff09\u5b58\u5132\uff1a<\/strong>\u5c07\u6587\u4ef6\u7684\u4e8c\u9032\u5236\u6578\u64da\u76f4\u63a5\u5b58\u5132\u5728\u6578\u64da\u5eab\u4e2d\u3002<\/li>\n<\/ul>\n<p>\u6839\u64da\u61c9\u7528\u9700\u6c42\u7684\u4e0d\u540c\uff0c\u958b\u767c\u8005\u53ef\u4ee5\u9078\u64c7\u9069\u5408\u7684\u5b58\u5132\u65b9\u5f0f\u3002\u672c\u6587\u5c07\u91cd\u9ede\u4ecb\u7d39\u5982\u4f55\u4f7f\u7528BLOB\u5b58\u5132\u6587\u4ef6\u3002<\/p>\n<h2 id=\"%e4%bd%bf%e7%94%a8c%e8%aa%9e%e8%a8%80%e5%b0%87%e6%96%87%e4%bb%b6%e4%bf%9d%e5%ad%98%e5%88%b0%e6%95%b8%e6%93%9a%e5%ba%ab-rqiPZdtoNq\">\u4f7f\u7528C\u8a9e\u8a00\u5c07\u6587\u4ef6\u4fdd\u5b58\u5230\u6578\u64da\u5eab<\/h2>\n<p>\u5728C\u8a9e\u8a00\u4e2d\uff0c\u6211\u5011\u53ef\u4ee5\u4f7f\u7528MySQL\u6578\u64da\u5eab\u4f86\u6f14\u793a\u5982\u4f55\u5c07\u6587\u4ef6\u4fdd\u5b58\u70baBLOB\u3002\u4ee5\u4e0b\u662f\u5be6\u73fe\u7684\u6b65\u9a5f\uff1a<\/p>\n<h3 id=\"1-%e5%ae%89%e8%a3%9dmysql-c-api-rqiPZdtoNq\">1. \u5b89\u88ddMySQL C API<\/h3>\n<p>\u9996\u5148\uff0c\u78ba\u4fdd\u4f60\u7684\u958b\u767c\u74b0\u5883\u4e2d\u5df2\u7d93\u5b89\u88dd\u4e86MySQL C API\u3002\u9019\u53ef\u4ee5\u901a\u904e\u4ee5\u4e0b\u547d\u4ee4\u5b89\u88dd\uff1a<\/p>\n<pre><code>sudo apt-get install libmysqlclient-dev<\/code><\/pre>\n<h3 id=\"2-%e5%89%b5%e5%bb%ba%e6%95%b8%e6%93%9a%e5%ba%ab%e5%92%8c%e8%a1%a8-rqiPZdtoNq\">2. \u5275\u5efa\u6578\u64da\u5eab\u548c\u8868<\/h3>\n<p>\u5728MySQL\u4e2d\u5275\u5efa\u4e00\u500b\u6578\u64da\u5eab\u548c\u4e00\u500b\u8868\u4f86\u5b58\u5132\u6587\u4ef6\u3002\u4ee5\u4e0b\u662f\u5275\u5efa\u8868\u7684SQL\u8a9e\u53e5\uff1a<\/p>\n<pre><code>CREATE TABLE files (\n    id INT AUTO_INCREMENT PRIMARY KEY,\n    filename VARCHAR(255) NOT NULL,\n    filedata LONGBLOB NOT NULL\n);<\/code><\/pre>\n<h3 id=\"3-%e7%b7%a8%e5%af%abc%e8%aa%9e%e8%a8%80%e4%bb%a3%e7%a2%bc-rqiPZdtoNq\">3. \u7de8\u5bebC\u8a9e\u8a00\u4ee3\u78bc<\/h3>\n<p>\u4ee5\u4e0b\u662f\u5c07\u6587\u4ef6\u4fdd\u5b58\u5230\u6578\u64da\u5eab\u7684C\u8a9e\u8a00\u793a\u4f8b\u4ee3\u78bc\uff1a<\/p>\n<pre><code>#include \n#include \n#include \n#include \n\nvoid save_file_to_db(const char *filename) {\n    MYSQL *conn;\n    MYSQL_RES *res;\n    MYSQL_ROW row;\n    \n    \/\/ \u521d\u59cb\u5316MySQL\u9023\u63a5\n    conn = mysql_init(NULL);\n    if (conn == NULL) {\n        fprintf(stderr, \"mysql_init() failedn\");\n        return;\n    }\n\n    \/\/ \u9023\u63a5\u5230\u6578\u64da\u5eab\n    if (mysql_real_connect(conn, \"localhost\", \"user\", \"password\", \"database\", 0, NULL, 0) == NULL) {\n        fprintf(stderr, \"mysql_real_connect() failedn\");\n        mysql_close(conn);\n        return;\n    }\n\n    \/\/ \u6253\u958b\u6587\u4ef6\n    FILE *file = fopen(filename, \"rb\");\n    if (!file) {\n        fprintf(stderr, \"Could not open file %sn\", filename);\n        mysql_close(conn);\n        return;\n    }\n\n    \/\/ \u7372\u53d6\u6587\u4ef6\u5927\u5c0f\n    fseek(file, 0, SEEK_END);\n    long file_size = ftell(file);\n    fseek(file, 0, SEEK_SET);\n\n    \/\/ \u8b80\u53d6\u6587\u4ef6\u6578\u64da\n    char *file_data = (char *)malloc(file_size);\n    fread(file_data, 1, file_size, file);\n    fclose(file);\n\n    \/\/ \u6e96\u5099SQL\u8a9e\u53e5\n    char query[1024];\n    snprintf(query, sizeof(query), \"INSERT INTO files (filename, filedata) VALUES ('%s', ?)\", filename);\n\n    \/\/ \u4f7f\u7528\u9810\u8655\u7406\u8a9e\u53e5\n    MYSQL_STMT *stmt = mysql_stmt_init(conn);\n    mysql_stmt_prepare(stmt, query, strlen(query));\n\n    \/\/ \u7d81\u5b9a\u53c3\u6578\n    MYSQL_BIND bind[2];\n    memset(bind, 0, sizeof(bind));\n\n    bind[0].buffer_type = MYSQL_TYPE_STRING;\n    bind[0].buffer = (char *)filename;\n    bind[0].buffer_length = strlen(filename);\n\n    bind[1].buffer_type = MYSQL_TYPE_BLOB;\n    bind[1].buffer = file_data;\n    bind[1].buffer_length = file_size;\n\n    mysql_stmt_bind_param(stmt, bind);\n    \n    \/\/ \u57f7\u884c\u8a9e\u53e5\n    if (mysql_stmt_execute(stmt)) {\n        fprintf(stderr, \"mysql_stmt_execute() failedn\");\n    }\n\n    \/\/ \u6e05\u7406\n    free(file_data);\n    mysql_stmt_close(stmt);\n    mysql_close(conn);\n}\n\nint main() {\n    save_file_to_db(\"example.txt\");\n    return 0;\n}<\/code><\/pre>\n<h2 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href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a> 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