done purchases remove, ocr scan, read image

express-server/node_modules/busboy/lib/main.js

@@ -0,0 +1,89 @@
+var fs = require('fs'),
+    WritableStream = require('stream').Writable
+                     || require('readable-stream').Writable,
+    inherits = require('util').inherits;
+
+var parseParams = require('./utils').parseParams;
+
+function Busboy(opts) {
+  if (!(this instanceof Busboy))
+    return new Busboy(opts);
+  if (opts.highWaterMark !== undefined)
+    WritableStream.call(this, { highWaterMark: opts.highWaterMark });
+  else
+    WritableStream.call(this);
+
+  this._done = false;
+  this._parser = undefined;
+  this._finished = false;
+
+  this.opts = opts;
+  if (opts.headers && typeof opts.headers['content-type'] === 'string')
+    this.parseHeaders(opts.headers);
+  else
+    throw new Error('Missing Content-Type');
+}
+inherits(Busboy, WritableStream);
+
+Busboy.prototype.emit = function(ev) {
+  if (ev === 'finish') {
+    if (!this._done) {
+      this._parser && this._parser.end();
+      return;
+    } else if (this._finished) {
+      return;
+    }
+    this._finished = true;
+  }
+  WritableStream.prototype.emit.apply(this, arguments);
+};
+
+Busboy.prototype.parseHeaders = function(headers) {
+  this._parser = undefined;
+  if (headers['content-type']) {
+    var parsed = parseParams(headers['content-type']),
+        matched, type;
+    for (var i = 0; i < TYPES.length; ++i) {
+      type = TYPES[i];
+      if (typeof type.detect === 'function')
+        matched = type.detect(parsed);
+      else
+        matched = type.detect.test(parsed[0]);
+      if (matched)
+        break;
+    }
+    if (matched) {
+      var cfg = {
+        limits: this.opts.limits,
+        headers: headers,
+        parsedConType: parsed,
+        highWaterMark: undefined,
+        fileHwm: undefined,
+        defCharset: undefined,
+        preservePath: false
+      };
+      if (this.opts.highWaterMark)
+        cfg.highWaterMark = this.opts.highWaterMark;
+      if (this.opts.fileHwm)
+        cfg.fileHwm = this.opts.fileHwm;
+      cfg.defCharset = this.opts.defCharset;
+      cfg.preservePath = this.opts.preservePath;
+      this._parser = type(this, cfg);
+      return;
+    }
+  }
+  throw new Error('Unsupported content type: ' + headers['content-type']);
+};
+
+Busboy.prototype._write = function(chunk, encoding, cb) {
+  if (!this._parser)
+    return cb(new Error('Not ready to parse. Missing Content-Type?'));
+  this._parser.write(chunk, cb);
+};
+
+var TYPES = [
+  require('./types/multipart'),
+  require('./types/urlencoded'),
+];
+
+module.exports = Busboy;