功能: 服务端生成完整报告并保护单任务

- 使用 libxlsxwriter 常量内存导出 Excel\n- 增加全局任务占用提示与原始数据持久化\n- 保留运行时任务数据并更新接口文档

third_party/libxlsxwriter_repo/examples/output_buffer.c

@@ -0,0 +1,42 @@
+/*
+ * Example of using libxlsxwriter to write a workbook file to a memory buffer.
+ *
+ * Copyright 2014-2021, John McNamara, jmcnamara@cpan.org
+ *
+ */
+
+#include <stdio.h>
+
+#include "xlsxwriter.h"
+
+int main() {
+    char *output_buffer;
+    size_t output_buffer_size;
+
+    /* Set the worksheet options. */
+    lxw_workbook_options options = {.output_buffer = &output_buffer,
+                                    .output_buffer_size = &output_buffer_size,
+                                    .constant_memory = LXW_FALSE,
+                                    .tmpdir = NULL,
+                                    .use_zip64 = LXW_FALSE};
+
+    /* Create a new workbook with options. */
+    lxw_workbook  *workbook  = workbook_new_opt(NULL, &options);
+    lxw_worksheet *worksheet = workbook_add_worksheet(workbook, NULL);
+
+    worksheet_write_string(worksheet, 0, 0, "Hello", NULL);
+    worksheet_write_number(worksheet, 1, 0, 123,     NULL);
+
+    lxw_error error = workbook_close(workbook);
+
+    if (error)
+        return error;
+
+    /* Do something with the XLSX data in the output buffer. */
+    FILE *file = fopen("output_buffer.xlsx", "wb");
+    fwrite(output_buffer, output_buffer_size, 1, file);
+    fclose(file);
+    free(output_buffer);
+
+    return ferror(stdout);
+}