Question

Node Red中的初学者。寻找一些使用

的例子

inject/timestamp node和http in node通过http response输出到html。

我能够在debug node中获取时间戳输出，但http response节点返回

“无响应对象”

流程代码

[
    {
        "id": "9f006bd1.640c3",
        "type": "http response",
        "z": "d5fed3fc.0eb49",
        "name": "",
        "x": 897.2000122070312,
        "y": 167.1999969482422,
        "wires": [ ]
    },
    {
        "id": "e3c543a2.edb15",
        "type": "function",
        "z": "d5fed3fc.0eb49",
        "name": "setHTTPheader",
        "func": "// If sending JSON data the content type is:\n//msg.headers={\"Content-Type\":\"application/json\"}\n\n// For HTML use the content type line below:\nmsg.headers={\"Content-Type\":\"text/html\"}\nreturn msg;",
        "outputs": 1,
        "noerr": 0,
        "x": 530.2000122070312,
        "y": 178.1999969482422,
        "wires": [ [ "9f006bd1.640c3", "148ad3e4.c6b5bc" ] ]
    },
    {
        "id": "30bfd46d.90b3fc",
        "type": "inject",
        "z": "d5fed3fc.0eb49",
        "name": "",
        "topic": "",
        "payload": "",
        "payloadType": "date",
        "repeat": "",
        "crontab": "",
        "once": true,
        "x": 214.1999969482422,
        "y": 118.19999694824219,
        "wires": [ [ "e3c543a2.edb15" ] ]
    },
    {
        "id": "974e0c4.06af17",
        "type": "http in",
        "z": "d5fed3fc.0eb49",
        "name": "/time",
        "url": "/time",
        "method": "get",
        "swaggerDoc": "",
        "x": 199.5,
        "y": 175.40000915527344,
        "wires": [ [ "e3c543a2.edb15" ] ]
    },
    {
        "id": "148ad3e4.c6b5bc",
        "type": "debug",
        "z": "d5fed3fc.0eb49",
        "name": "",
        "active": true,
        "console": "false",
        "complete": "payload",
        "x": 895.5000457763672,
        "y": 211.8000030517578,
        "wires": [ ]
    }
]

流程图

Answer 1

嗯，如果我理解你的问题，我不是百分百确定，但如果你想知道为什么会这样做

“无响应对象”

当触发左上角inject node时，简单的答案是因为没有http response对象将输出写入 - 只有当你通过左下方{{1}触发流时它才存在}节点。在您的示例中，您可以通过在浏览器中打开http://localhost:1880/time来触发它（假设您使用默认端口运行）。

如果您始终希望在回复中看到当前时间戳，只需在http in中添加以下内容：

function node

在节点红色的html页面上输出的时间戳

1 个答案: