node-red-contrib-file-buffer

Node-RED Node to be used in conjunction with the http multipart in node. As the multipart node does not provide a buffer, this node can be used to load a file using a path into a buffer or as a stream.

Install

Run the following command in the root directory of your Node-RED install:
````

npm install node-red-contrib-file-buffer

````

Usage

Input

Set msg.payload to a file path. If you are using the http in multipart node then the path for the first file will be
````

var files = Object.keys(msg.req.files);

msg.payload = msg.req.files[files[0]][0].path;

````

Output

msg.payload will be a buffer or a stream containing the file contents.

Sample flow

This flow uses a multipart form to send a file to Watson Recognition for classification.
```` {"id":"eb836b23.3e0a68","type":"http response","z":"a0fe910.b40c17","name":"","x":615,"y":119,"wires":},{"id":"bb218734.439a58","type":"httpInMultipart","z":"a0fe910.b40c17","name":"Classify Image","url":"/classify","method":"post","fields":"{ \"name\":\"pic\"}","swaggerDoc":"","x":86,"y":177,"wires":"d75e6046.76f49"},{"id":"11b6c481.a08d3b","type":"http in","z":"a0fe910.b40c17","name":"Get Home Page","url":"/homepage","method":"get","swaggerDoc":"","x":85,"y":107,"wires":"31531035.4de9d"},{"id":"31531035.4de9d","type":"template","z":"a0fe910.b40c17","name":"Form and Response Template","field":"payload","fieldType":"msg","format":"handlebars","syntax":"mustache","template":" \n \n \n \">
\n \n \n \n \n \n","x":364.5,"y":117,"wires":"eb836b23.3e0a68"},{"id":"d75e6046.76f49","type":"function","z":"a0fe910.b40c17","name":" Determine File Path","func":"if (msg.req.files) {\n var files = Object.keys(msg.req.files);\n msg.payload = msg.req.filesfiles00.path; \n}\nreturn msg;","outputs":1,"noerr":0,"x":109.5,"y":234,"wires":"bea9b8a5.b99eb8"},{"id":"50dca2d0.e3764c","type":"visual-recognition-v3","z":"a0fe910.b40c17","name":"","apikey":"","image-feature":"classifyImage","lang":"en","x":345,"y":233,"wires":"969cd9bb.6d62f8","31531035.4de9d"},{"id":"969cd9bb.6d62f8","type":"debug","z":"a0fe910.b40c17","name":"","active":true,"console":"false","complete":"result","x":556.5,"y":277,"wires":},{"id":"bea9b8a5.b99eb8","type":"file-buffer","z":"a0fe910.b40c17","name":"","x":144,"y":307,"wires":"50dca2d0.e3764c"} ````

Contributing

For simple typos and fixes please just raise an issue pointing out our mistakes. If you need to raise a pull request please read our contribution guidelines before doing so.

Copyright and license

Copyright 2017 IBM Corp. under the Apache 2.0 license.