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dropbox.js
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dropbox.js
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/**
* Copyright JS Foundation and other contributors, http://js.foundation
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
**/
module.exports = function(RED) {
"use strict";
var { Dropbox } = require("dropbox");
var fs = require("fs");
var minimatch = require("minimatch");
var isUtf8 = require('is-utf8');
var fspath = require("path");
function DropboxNode(n) {
RED.nodes.createNode(this,n);
this.dropbox = new Dropbox({
// Since the refresh token has been obtained via a secure PKCE authentication flow, Dropbox only requires
// the refresh token and the App Key (= client id). But in this case no App Secret is required...
clientId: this.credentials.clientid,
refreshToken: this.credentials.refreshtoken
});
}
RED.nodes.registerType("dropbox-config",DropboxNode,{
credentials: {
clientid: { type:"password" },
refreshtoken: { type:"password" }
}
});
function DropboxInNode(n) {
RED.nodes.createNode(this,n);
var dropboxConfig = RED.nodes.getNode(n.dropbox);
var credentials = dropboxConfig ? dropboxConfig.credentials : {};
if (!credentials.refreshtoken) {
this.warn(RED._("dropbox.warn.missing-refresh-token"));
return;
}
this.filepattern = n.filepattern || "";
if (this.filepattern && this.filepattern[0] !== '/') {
this.filepattern = '/'+this.filepattern;
}
var node = this;
var dropbox = dropboxConfig.dropbox;
var currentFiles = {};
var initialized = false;
var longPollTimeout;
var closing = false;
node.getFolderCursor = function() {
if (node.trace) {
node.trace("get cursor");
}
node.status({fill:"blue",shape:"dot",text:"dropbox.status.initializing"});
return dropbox.filesListFolder({path: '',recursive:true}).then(function(response) { return response.result.cursor })
}
node.drainCursor = function(cursor, emit) {
if (closing) {
return;
}
if (emit) {
node.status({fill:"blue",shape:"dot",text:"dropbox.status.checking-for-changes"});
}
if (node.trace) {
node.trace("draining files emit="+!!emit);
}
return dropbox.filesListFolderContinue({cursor: cursor}).then(function(response) {
if (closing) {
return;
}
response.result.entries.forEach(function(entry) {
if (emit) {
if (node.filepattern && !minimatch(entry.path_display, node.filepattern)) {
return;
}
var change = {
payload: entry.path_display,
file: entry.name,
};
if (entry['.tag'] === 'deleted') {
change.event = 'delete';
} else if (!currentFiles[entry.path_display]) {
change.event = 'add';
} else {
change.event = 'change';
}
node.send(change);
}
currentFiles[entry.path_display] = entry.server_modified;
});
if (response.has_more) {
return node.drainCursor(response.result.cursor,emit);
} else {
node.status({});
}
return response.result.cursor;
});
}
node.poll = function(cursor,backoff) {
if (closing) {
return;
}
if (node.trace) {
node.trace("polling backoff="+(backoff||0));
}
if (backoff) {
longPollTimeout = setTimeout(function() {
node.poll(cursor);
},backoff*1000);
return;
}
return dropbox.filesListFolderLongpoll({cursor: cursor}).then(function(response) {
if (closing) {
return;
}
if (response.result.changes) {
node.drainCursor(cursor,true).then(function(c) {
if (closing) {
return;
}
node.poll(c,response.backoff);
})
} else {
node.poll(cursor,response.backoff);
}
}).catch(function(err) {
var errorMessage;
if (err.error) {
errorMessage = err.error;
} else {
errorMessage = err.toString();
}
if (node.trace) {
node.trace("Error polling:"+errorMessage);
}
if (err.error[".tag"] === 'reset') {
startPolling();
} else {
longPollTimeout = setTimeout(function() {
node.poll(cursor,backoff);
},15000);
}
})
}
node.startPolling = function() {
if (closing) {
return;
}
if (node.trace) {
node.trace("Starting polling");
}
node.getFolderCursor()
.then(node.drainCursor)
.then(node.poll)
.catch(function(err) {
var errorMessage;
if (err.error) {
errorMessage = err.error;
} else {
errorMessage = err.toString();
}
if (node.trace) {
node.trace("Error polling:"+errorMessage);
}
node.status({fill:"red",shape:"ring",text:"dropbox.status.failed"});
longPollTimeout = setTimeout(function() {
node.startPolling();
},15000);
})
}
node.startPolling();
node.on("close", function() {
if (longPollTimeout) {
clearTimeout(longPollTimeout);
}
closing = true;
// if (tout) { clearTimeout(tout); }
// if (interval) { clearInterval(interval); }
});
}
RED.nodes.registerType("dropbox in",DropboxInNode);
function DropboxQueryNode(n) {
RED.nodes.createNode(this,n);
this.filename = n.filename || "";
var dropboxConfig = RED.nodes.getNode(n.dropbox);
var credentials = dropboxConfig ? dropboxConfig.credentials : {};
if (!credentials.refreshtoken) {
this.warn(RED._("dropbox.warn.missing-refresh-token"));
return;
}
var node = this;
var dropbox = dropboxConfig.dropbox;
node.on("input", function(msg) {
var filename = this.filename || msg.filename;
if (filename === "") {
node.error(RED._("dropbox.error.no-filename"),msg);
return;
}
if (filename[0] !== '/') {
filename = '/'+filename;
}
msg.filename = filename;
node.status({fill:"blue",shape:"dot",text:"dropbox.status.downloading"});
dropbox.filesDownload({path: filename}).then(function(response) {
var data = response.result.fileBinary;
var dataBuffer = Buffer.from(data,'binary');
if (!isUtf8(dataBuffer)) {
msg.payload = dataBuffer;
} else {
msg.payload = data;
}
node.status({});
node.send(msg);
}).catch(function(err) {
var errorMessage;
if (err.error) {
errorMessage = err.error;
} else {
errorMessage = err.toString();
}
node.error(RED._("dropbox.error.download-failed",{err:errorMessage}),msg);
node.status({fill:"red",shape:"ring",text:"dropbox.status.failed"});
});
});
}
RED.nodes.registerType("dropbox",DropboxQueryNode);
function DropboxOutNode(n) {
RED.nodes.createNode(this,n);
this.filename = n.filename || "";
this.localFilename = n.localFilename || "";
var dropboxConfig = RED.nodes.getNode(n.dropbox);
var credentials = dropboxConfig ? dropboxConfig.credentials : {};
if (!credentials.refreshtoken) {
this.warn(RED._("dropbox.warn.missing-refresh-token"));
return;
}
var node = this;
var dropbox = dropboxConfig.dropbox;
node.on("input", function(msg) {
var localFilename = this.localFilename || msg.localFilename || "";
var filename = this.filename || msg.filename || "";
if (filename === "") {
if (localFilename) {
filename = fspath.basename(localFilename);
} else {
node.error(RED._("dropbox.error.no-filename"),msg);
node.status({fill:"red",shape:"ring",text:"dropbox.status.failed"});
return;
}
}
if (filename[0] !== '/') {
filename = '/'+filename;
}
if (localFilename) {
// TODO: use chunked upload for files larger than 150M
node.status({fill:"blue",shape:"dot",text:"dropbox.status.uploading"});
fs.readFile(localFilename, function read(err, data) {
if (err) {
node.error(err.toString(),msg);
node.status({fill:"red",shape:"ring",text:"dropbox.status.failed"});
return;
}
dropbox.filesUpload({ path: filename, contents: data, mode: {".tag":"overwrite"}})
.then(function (response) {
node.status({});
})
.catch(function (err) {
var errorMessage;
if (err.error) {
errorMessage = err.error;
} else {
errorMessage = err.toString();
}
node.error(errorMessage,msg);
node.status({fill:"red",shape:"ring",text:"dropbox.status.failed"});
});
});
} else if (typeof msg.payload !== "undefined") {
var data = RED.util.ensureBuffer(msg.payload);
node.status({fill:"blue",shape:"dot",text:"dropbox.status.uploading"});
dropbox.filesUpload({ path: filename, contents: data, mode: {".tag":"overwrite"}})
.then(function (response) {
node.status({});
})
.catch(function (err) {
var errorMessage;
if (err.error) {
errorMessage = err.error;
} else {
errorMessage = err.toString();
}
node.error(errorMessage,msg);
node.status({fill:"red",shape:"ring",text:"dropbox.status.failed"});
});
}
});
}
RED.nodes.registerType("dropbox out",DropboxOutNode);
};