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javascript - 使用 http 端点在 Node-RED 仪表板中显示本地镜像

转载 作者:行者123 更新时间:2023-12-03 02:33:39 24 4
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我需要使用 http 端点在 Node-RED 仪表板上显示图像。我已完成以下操作:

  1. 将图像保存在/home/pi/Pictures 中。
  2. 在setting.js 文件中编辑了httpStatic:“/home/pi/Pictures”。
  3. 尝试在 html 图像标签中的 src 图像名称前使用斜杠“/” 没有“/”但没有任何作用。

这是我的流程供引用:

[
{
"id": "7b08a202.a1670c",
"type": "http in",
"z": "e5e5e9b.2a8cc18",
"name": "",
"url": "/display-image",
"method": "get",
"upload": false,
"swaggerDoc": "",
"x": 112,
"y": 73,
"wires": [
[
"35ca7d97.da9dd2"
]
]
},
{
"id": "f8cf60ed.74b87",
"type": "http response",
"z": "e5e5e9b.2a8cc18",
"name": "",
"statusCode": "",
"headers": {

},
"x": 458,
"y": 70,
"wires": [

]
},
{
"id": "35ca7d97.da9dd2",
"type": "template",
"z": "e5e5e9b.2a8cc18",
"name": "SLD View",
"field": "payload",
"fieldType": "msg",
"format": "handlebars",
"syntax": "mustache",
"template": "<!DOCTYPE html>\n<html>\n <body>\n <img src=\"Barsu_SLD.png\" alt=\"Overview\" width=1000px; height=800px>\n \n </body>\n</html>",
"output": "str",
"x": 310,
"y": 136,
"wires": [
[
"f8cf60ed.74b87"
]
]
},
{
"id": "2beda89c.ca2b98",
"type": "ui_template",
"z": "e5e5e9b.2a8cc18",
"group": "d9e6ccf5.f58ab",
"name": "Display Button",
"order": 0,
"width": 0,
"height": 0,
"format": "<!DOCTYPE html>\n<html>\n <head>\n <style>\n .button {\n background-color: #086A87;\n border: none;\n color: white;\n padding: 16px 32px;\n text-align: center;\n text-decoration: none;\n font-size: 16px;\n margin: 3px 1px;\n cursor: pointer;\n border-radius: 4px;\n }\n .button_over:hover {\n background-color: #187A97;\n color: white;\n }\n </style>\n </head>\n <body>\n \n <a href=\"http://127.0.0.1:1880/BARSU-SLD/\" class=\"button button_over\" target=\"_blank\" >SLD View</a> \n \n </body>\n </html>",
"storeOutMessages": false,
"fwdInMessages": true,
"templateScope": "local",
"x": 112,
"y": 195,
"wires": [
[

]
]
},
{
"id": "d9e6ccf5.f58ab",
"type": "ui_group",
"z": "",
"name": "Test",
"tab": "1474e3ec.fb238c",
"disp": true,
"width": "6"
},
{
"id": "1474e3ec.fb238c",
"type": "ui_tab",
"z": "",
"name": "Home",
"icon": "dashboard"
}
]

任何帮助都非常值得赞赏。

最佳答案

如果您有httpStatic设置为~/.node-red/public ,例如在 settings.js 中使用以下内容

httpStatic: path.join('', 'public'),

如果您有文件:~/.node-red/public/images/myimage.png

那么你的url应该使用html

<img src="/images/myimage.png">

注意开头的 /并且缺乏任何http://localhost:1880 。您不需要提供 http 部分,因为您的浏览器会自动为您匹配该部分。

另请注意,如果您设置了 httpRoot对于某些内容,您还需要在 URL 前添加该前缀。

关于javascript - 使用 http 端点在 Node-RED 仪表板中显示本地镜像,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/48623117/

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