From 4c16540bf1103c418f9c1e903c3ded415c34f9d3 Mon Sep 17 00:00:00 2001
From: Zhao Xin <7176466@qq.com>
Date: Sun, 4 Sep 2022 14:26:51 +0800
Subject: [PATCH] =?UTF-8?q?=E6=96=B0=E5=BB=BA?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 README.md         |  7 +++++--
 package-lock.json | 32 ++++++++++++++++++++++++++++++++
 package.json      | 20 ++++++++++++++++++++
 server.js         | 41 +++++++++++++++++++++++++++++++++++++++++
 4 files changed, 98 insertions(+), 2 deletions(-)
 create mode 100644 package-lock.json
 create mode 100644 package.json
 create mode 100644 server.js

diff --git a/README.md b/README.md
index 07efdeb..dbf2324 100644
--- a/README.md
+++ b/README.md
@@ -1,3 +1,6 @@
-# rpi_status_http_server
+# 树莓派状态 JSON 数据接口
 
-树莓派状态HTTP JSON数据接口
\ No newline at end of file
+``` bash
+npm install
+npm start
+```
diff --git a/package-lock.json b/package-lock.json
new file mode 100644
index 0000000..5e54762
--- /dev/null
+++ b/package-lock.json
@@ -0,0 +1,32 @@
+{
+    "name": "rpi_status_http_server",
+    "version": "0.0.1",
+    "lockfileVersion": 2,
+    "requires": true,
+    "packages": {
+        "": {
+            "name": "rpi_status_http_server",
+            "version": "0.0.1",
+            "license": "MIT",
+            "dependencies": {
+                "dotenv": "^16.0.2"
+            }
+        },
+        "node_modules/dotenv": {
+            "version": "16.0.2",
+            "resolved": "https://mirrors.cloud.tencent.com/npm/dotenv/-/dotenv-16.0.2.tgz",
+            "integrity": "sha512-JvpYKUmzQhYoIFgK2MOnF3bciIZoItIIoryihy0rIA+H4Jy0FmgyKYAHCTN98P5ybGSJcIFbh6QKeJdtZd1qhA==",
+            "license": "BSD-2-Clause",
+            "engines": {
+                "node": ">=12"
+            }
+        }
+    },
+    "dependencies": {
+        "dotenv": {
+            "version": "16.0.2",
+            "resolved": "https://mirrors.cloud.tencent.com/npm/dotenv/-/dotenv-16.0.2.tgz",
+            "integrity": "sha512-JvpYKUmzQhYoIFgK2MOnF3bciIZoItIIoryihy0rIA+H4Jy0FmgyKYAHCTN98P5ybGSJcIFbh6QKeJdtZd1qhA=="
+        }
+    }
+}
diff --git a/package.json b/package.json
new file mode 100644
index 0000000..98ceb0b
--- /dev/null
+++ b/package.json
@@ -0,0 +1,20 @@
+{
+    "name": "rpi_status_http_server",
+    "version": "0.0.1",
+    "description": "树莓派状态 JSON 数据接口",
+    "main": "server.js",
+    "scripts": {
+        "test": "echo \"Error: no test specified\" && exit 1",
+        "start": "node server.js"
+    },
+    "repository": {
+        "type": "git",
+        "url": "ssh://git@nas:2222/zhaoxin/rpi_status_http_server.git"
+    },
+    "keywords": [],
+    "author": "Zhao Xin <7176466@qq.com>",
+    "license": "MIT",
+    "dependencies": {
+        "dotenv": "^16.0.2"
+    }
+}
diff --git a/server.js b/server.js
new file mode 100644
index 0000000..04f71cc
--- /dev/null
+++ b/server.js
@@ -0,0 +1,41 @@
+/**
+ * 树莓派状态 JSON 数据接口
+ */
+require('dotenv').config()
+const fs = require('fs')
+const http = require('http')
+const hostname = require('os').hostname()
+const exec = require('child_process').exec
+const MEMINFO_FILE_PATH = '/proc/meminfo'
+const TEMPERATURE_FILE_PATH = '/sys/class/thermal/thermal_zone0/temp'
+const server = http.createServer(function (request, response) {
+    response.setHeader('Access-Control-Allow-Origin', '*')
+    response.setHeader('Access-Control-Allow-Methods', 'HEAD,GET,POST,OPTIONS,PATCH,PUT,DELETE')
+    response.setHeader('Access-Control-Allow-Headers', 'Origin,X-Requested-With,Authorization,Content-Type,Accept,Z-Key')
+    response.setHeader('Content-Type', 'application/json')
+    try {
+        const temp_string = fs.readFileSync(TEMPERATURE_FILE_PATH)
+        const meminfo_string = String(fs.readFileSync(MEMINFO_FILE_PATH))
+        const meminfo_total = meminfo_string.match(/MemTotal\:\s+(\d+) kB/)
+        const meminfo_available = meminfo_string.match(/MemAvailable\:\s+(\d+) kB/)
+        const result = {
+            hostname,
+            cpu: {
+                temperature: Number((temp_string / 1000).toFixed(3)),
+            },
+            memory: {
+                total: Number((meminfo_total[1] / 1024).toFixed(2)),
+                available: Number((meminfo_available[1] / 1024).toFixed(2))
+            },
+        }
+        exec("cat /proc/stat |grep cpu |tail -1|awk '{print ($5*100)/($2+$3+$4+$5+$6+$7+$8+$9+$10)}'|awk '{print 100 - $1}'", (err, stdout, stderr) => {
+            result.cpu.load = Number((stdout / 100).toFixed(4))
+            response.end(JSON.stringify(result))
+        })
+    } catch (error) {
+        response.statusCode = 500
+        response.end(JSON.stringify({ error }))
+    }
+})
+const port = process.env.PORT || 3000
+server.listen(port, () => console.log(`rpi status http server running at http://localhost:${port}`);)