node-red/nodes/core/storage/50-file.html

<script type="text/x-red" data-template-name="file">
    <div class="form-row node-input-filename">
         <label for="node-input-filename"><i class="fa fa-file"></i> <span data-i18n="file.label.filename"></span></label>
         <input id="node-input-filename" type="text">
    </div>
    <div class="form-row">
        <label for="node-input-overwriteFile"><i class="fa fa-random"></i> <span data-i18n="file.label.action"></span></label>
        <select type="text" id="node-input-overwriteFile" style="width: 250px;">
            <option value="false" data-i18n="file.action.append"></option>
            <option value="true" data-i18n="file.action.overwrite"></option>
            <option value="delete" data-i18n="file.action.delete"></option>
        </select>
    </div>
    <div class="form-row form-row-file-write-options">
        <label>&nbsp;</label>
        <input type="checkbox" id="node-input-appendNewline" style="display: inline-block; width: auto; vertical-align: top;">
        <label for="node-input-appendNewline" style="width: 70%;"><span data-i18n="file.label.addnewline"></span></label>
    </div>
    <div class="form-row form-row-file-write-options">
        <label>&nbsp;</label>
        <input type="checkbox" id="node-input-createDir" style="display: inline-block; width: auto; vertical-align: top;">
        <label for="node-input-createDir" style="width: 70%;"><span data-i18n="file.label.createdir"></span></label>
    </div>
    <div class="form-row">
        <label for="node-input-name"><i class="fa fa-tag"></i> <span data-i18n="common.label.name"></span></label>
        <input type="text" id="node-input-name" data-i18n="[placeholder]common.label.name">
    </div>
    <div class="form-tips"><span data-i18n="file.tip"></span></div>
</script>

<script type="text/x-red" data-help-name="file">
    <p>Writes <code>msg.payload</code> to a file, either adding to the end or replacing the existing content.
       Alternatively, it can delete the file.</p>
    <h3>Inputs</h3>
    <dl class="message-properties">
        <dt class="optional">filename <span class="property-type">string</span></dt>
        <dd>If not configured in the node, this optional property sets the name of the file to be updated.</dd>
    </dl>
    <h3>Details</h3>
    <p>Each message payload will be added to the end of the file, optionally appending
    a newline (\n) character between each one.</p>
    <p>If <code>msg.filename</code> is used the file will be closed after every write. 
    For best performance use a fixed filename.</p>
    <p>It can be configured to overwrite the entire file rather than append. For example,
    when writing binary data to a file, such as an image, this option should be used
    and the option to append a newline should be disabled.</p>
    <p>Alternatively, this node can be configured to delete the file.</p>
</script>

<script type="text/x-red" data-template-name="file in">
    <div class="form-row">
         <label for="node-input-filename"><i class="fa fa-file"></i> <span data-i18n="file.label.filename"></span></label>
         <input id="node-input-filename" type="text" data-i18n="[placeholder]file.label.filename">
    </div>
    <div class="form-row">
        <label for="node-input-format"><i class="fa fa-sign-out"></i> <span data-i18n="file.label.outputas"></span></label>
        <select id="node-input-format">
            <option value="utf8" data-i18n="file.output.utf8"></option>
            <option value="lines" data-i18n="file.output.lines"></option>
            <option value="" data-i18n="file.output.buffer"></option>
            <option value="stream" data-i18n="file.output.stream"></option>
        </select>
    </div>
    <div class="form-row">
        <label for="node-input-name"><i class="fa fa-tag"></i> <span data-i18n="common.label.name"></span></label>
        <input type="text" id="node-input-name" data-i18n="[placeholder]common.label.name">
    </div>
    <div class="form-tips"><span data-i18n="file.tip"></span></div>
</script>

<script type="text/x-red" data-help-name="file in">
    <p>Reads the contents of a file as either a string or binary buffer.</p>
    <h3>Inputs</h3>
    <dl class="message-properties">
        <dt class="optional">filename <span class="property-type">string</span></dt>
        <dd>if not set in the node configuration, this property sets the filename to read.</dd>
    </dl>
    <h3>Outputs</h3>
    <dl class="message-properties">
        <dt>payload <span class="property-type">string | buffer</span></dt>
        <dd>The contents of the file as either a string or binary buffer.</dd>
        <dt class="optional">filename <span class="property-type">string</span></dt>
        <dd>If not configured in the node, this optional property sets the name of the file to be read.</dd>
    </dl>
    <h3>Details</h3>
    <p>The filename should be an absolute path, otherwise it will be relative to
    the working directory of the Node-RED process.</p>
    <p>On Windows, path separators may need to be escaped, for example: <code>\\Users\\myUser</code>.</p>
    <p>Optionally, a text file can be split into lines, outputting one message per line, or a binary file
    file into smaller buffer chunks, the chunk size is operating system dependant, but typically 64k (linux/mac) or 41k (Windows).</p>
</script>

<script type="text/javascript">
    RED.nodes.registerType('file',{
        category: 'storage-output',
        defaults: {
            name: {value:""},
            filename: {value:""},
            appendNewline: {value:true},
            createDir: {value:false},
            overwriteFile: {value:"false"}
        },
        color:"BurlyWood",
        inputs:1,
        outputs:0,
        icon: "file.png",
        align: "right",
        label: function() {
            if (this.overwriteFile === "delete") {
                return this.name||this._("file.label.deletelabel",{file:this.filename});
            } else {
                return this.name||this.filename||this._("file.label.filelabel");
            }
        },
        labelStyle: function() {
            return this.name?"node_label_italic":"";
        },
        oneditprepare: function() {
            $("#node-input-overwriteFile").on("change",function() {
                if (this.value === "delete") { $(".form-row-file-write-options").hide(); }
                else { $(".form-row-file-write-options").show(); }
            });
        }
    });

    RED.nodes.registerType('file in',{
        category: 'storage-input',
        defaults: {
            name: {value:""},
            filename: {value:""},
            format: {value:"utf8"},
            chunk: {value:false}
        },
        color:"BurlyWood",
        inputs:1,
        outputs:1,
        outputLabels: function(i) {
            return (this.format === "utf8") ? "UTF8 string" : "binary buffer";
        },
        icon: "file.png",
        label: function() {
            return this.name||this.filename||this._("file.label.filelabel");
        },
        labelStyle: function() {
            return this.name?"node_label_italic":"";
        },
        oneditprepare: function() {
            $("#node-input-format").on("change",function() {
                if ($("#node-input-format").val() === "utf8") {
                    $("#buffer-input-type").hide();
                    $("#line-input-type").show();
                }
                else {
                    $("#buffer-input-type").show();
                    $("#line-input-type").hide();
                }
            });
        }
    });
</script>