100 lines
3.1 KiB
JavaScript
100 lines
3.1 KiB
JavaScript
/*\
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title: $:/plugins/tiddlywiki/multiwikiserver/routes/helpers/multipart-forms.js
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type: application/javascript
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module-type: library
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A function that handles an incoming multipart/form-data stream, streaming the data to temporary files
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in the store/inbox folder. Once the data is received, it imports any tiddlers and invokes a callback.
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\*/
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(function() {
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/*
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Process an incoming new multipart/form-data stream. Options include:
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store - tiddler store
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state - provided by server.js
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response - provided by server.js
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bag_name - name of bag to write to
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callback - invoked as callback(err,results). Results is an array of titles of imported tiddlers
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*/
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exports.processIncomingStream = function(options) {
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const self = this;
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const path = require("path"),
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fs = require("fs");
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// Process the incoming data
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const inboxName = $tw.utils.stringifyDate(new Date());
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const inboxPath = path.resolve(options.store.attachmentStore.storePath,"inbox",inboxName);
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$tw.utils.createDirectory(inboxPath);
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let fileStream = null; // Current file being written
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let hash = null; // Accumulating hash of current part
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let length = 0; // Accumulating length of current part
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const parts = []; // Array of {name:, headers:, value:, hash:} and/or {name:, filename:, headers:, inboxFilename:, hash:}
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options.state.streamMultipartData({
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cbPartStart: function(headers,name,filename) {
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const part = {
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name: name,
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filename: filename,
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headers: headers
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};
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if(filename) {
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const inboxFilename = (parts.length).toString();
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part.inboxFilename = path.resolve(inboxPath,inboxFilename);
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fileStream = fs.createWriteStream(part.inboxFilename);
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} else {
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part.value = "";
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}
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hash = new $tw.sjcl.hash.sha256();
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length = 0;
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parts.push(part)
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},
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cbPartChunk: function(chunk) {
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if(fileStream) {
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fileStream.write(chunk);
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} else {
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parts[parts.length - 1].value += chunk;
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}
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length = length + chunk.length;
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hash.update(chunk);
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},
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cbPartEnd: function() {
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if(fileStream) {
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fileStream.end();
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}
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fileStream = null;
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parts[parts.length - 1].hash = $tw.sjcl.codec.hex.fromBits(hash.finalize()).slice(0,64).toString();
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hash = null;
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},
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cbFinished: function(err) {
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if(err) {
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return options.callback(err);
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} else {
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const partFile = parts.find(part => part.name === "file-to-upload" && !!part.filename);
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if(!partFile) {
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return state.sendResponse(400, {"Content-Type": "text/plain"},"Missing file to upload");
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}
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const type = partFile.headers["content-type"];
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const tiddlerFields = {
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title: partFile.filename,
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type: type
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};
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for(const part of parts) {
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const tiddlerFieldPrefix = "tiddler-field-";
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if(part.name.startsWith(tiddlerFieldPrefix)) {
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tiddlerFields[part.name.slice(tiddlerFieldPrefix.length)] = part.value.trim();
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}
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}
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options.store.saveBagTiddlerWithAttachment(tiddlerFields,options.bag_name,{
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filepath: partFile.inboxFilename,
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type: type,
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hash: partFile.hash
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});
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$tw.utils.deleteDirectory(inboxPath);
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options.callback(null,[tiddlerFields.title]);
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}
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}
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});
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};
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})(); |