m. update

1 files changed, 347 insertions, 0 deletions

diff --git a/together/node_modules/formidable/src/parsers/Multipart.js b/together/node_modules/formidable/src/parsers/Multipart.js
new file mode 100644
index 0000000..23a298a
--- /dev/null
+++ b/together/node_modules/formidable/src/parsers/Multipart.js
@@ -0,0 +1,347 @@
+/* eslint-disable no-fallthrough */
+/* eslint-disable no-bitwise */
+/* eslint-disable no-plusplus */
+/* eslint-disable no-underscore-dangle */
+
+'use strict';
+
+const { Transform } = require('stream');
+const errors = require('../FormidableError.js');
+
+const { FormidableError } = errors;
+
+let s = 0;
+const STATE = {
+  PARSER_UNINITIALIZED: s++,
+  START: s++,
+  START_BOUNDARY: s++,
+  HEADER_FIELD_START: s++,
+  HEADER_FIELD: s++,
+  HEADER_VALUE_START: s++,
+  HEADER_VALUE: s++,
+  HEADER_VALUE_ALMOST_DONE: s++,
+  HEADERS_ALMOST_DONE: s++,
+  PART_DATA_START: s++,
+  PART_DATA: s++,
+  PART_END: s++,
+  END: s++,
+};
+
+let f = 1;
+const FBOUNDARY = { PART_BOUNDARY: f, LAST_BOUNDARY: (f *= 2) };
+
+const LF = 10;
+const CR = 13;
+const SPACE = 32;
+const HYPHEN = 45;
+const COLON = 58;
+const A = 97;
+const Z = 122;
+
+function lower(c) {
+  return c | 0x20;
+}
+
+exports.STATES = {};
+
+Object.keys(STATE).forEach((stateName) => {
+  exports.STATES[stateName] = STATE[stateName];
+});
+
+class MultipartParser extends Transform {
+  constructor(options = {}) {
+    super({ readableObjectMode: true });
+    this.boundary = null;
+    this.boundaryChars = null;
+    this.lookbehind = null;
+    this.bufferLength = 0;
+    this.state = STATE.PARSER_UNINITIALIZED;
+
+    this.globalOptions = { ...options };
+    this.index = null;
+    this.flags = 0;
+  }
+
+  _flush(done) {
+    if (
+      (this.state === STATE.HEADER_FIELD_START && this.index === 0) ||
+      (this.state === STATE.PART_DATA && this.index === this.boundary.length)
+    ) {
+      this._handleCallback('partEnd');
+      this._handleCallback('end');
+      done();
+    } else if (this.state !== STATE.END) {
+      done(
+        new FormidableError(
+          `MultipartParser.end(): stream ended unexpectedly: ${this.explain()}`,
+          errors.malformedMultipart,
+          400,
+        ),
+      );
+    }
+  }
+
+  initWithBoundary(str) {
+    this.boundary = Buffer.from(`\r\n--${str}`);
+    this.lookbehind = Buffer.alloc(this.boundary.length + 8);
+    this.state = STATE.START;
+    this.boundaryChars = {};
+
+    for (let i = 0; i < this.boundary.length; i++) {
+      this.boundaryChars[this.boundary[i]] = true;
+    }
+  }
+
+  // eslint-disable-next-line max-params
+  _handleCallback(name, buf, start, end) {
+    if (start !== undefined && start === end) {
+      return;
+    }
+    this.push({ name, buffer: buf, start, end });
+  }
+
+  // eslint-disable-next-line max-statements
+  _transform(buffer, _, done) {
+    let i = 0;
+    let prevIndex = this.index;
+    let { index, state, flags } = this;
+    const { lookbehind, boundary, boundaryChars } = this;
+    const boundaryLength = boundary.length;
+    const boundaryEnd = boundaryLength - 1;
+    this.bufferLength = buffer.length;
+    let c = null;
+    let cl = null;
+
+    const setMark = (name, idx) => {
+      this[`${name}Mark`] = typeof idx === 'number' ? idx : i;
+    };
+
+    const clearMarkSymbol = (name) => {
+      delete this[`${name}Mark`];
+    };
+
+    const dataCallback = (name, shouldClear) => {
+      const markSymbol = `${name}Mark`;
+      if (!(markSymbol in this)) {
+        return;
+      }
+
+      if (!shouldClear) {
+        this._handleCallback(name, buffer, this[markSymbol], buffer.length);
+        setMark(name, 0);
+      } else {
+        this._handleCallback(name, buffer, this[markSymbol], i);
+        clearMarkSymbol(name);
+      }
+    };
+
+    for (i = 0; i < this.bufferLength; i++) {
+      c = buffer[i];
+      switch (state) {
+        case STATE.PARSER_UNINITIALIZED:
+          return i;
+        case STATE.START:
+          index = 0;
+          state = STATE.START_BOUNDARY;
+        case STATE.START_BOUNDARY:
+          if (index === boundary.length - 2) {
+            if (c === HYPHEN) {
+              flags |= FBOUNDARY.LAST_BOUNDARY;
+            } else if (c !== CR) {
+              return i;
+            }
+            index++;
+            break;
+          } else if (index - 1 === boundary.length - 2) {
+            if (flags & FBOUNDARY.LAST_BOUNDARY && c === HYPHEN) {
+              this._handleCallback('end');
+              state = STATE.END;
+              flags = 0;
+            } else if (!(flags & FBOUNDARY.LAST_BOUNDARY) && c === LF) {
+              index = 0;
+              this._handleCallback('partBegin');
+              state = STATE.HEADER_FIELD_START;
+            } else {
+              return i;
+            }
+            break;
+          }
+
+          if (c !== boundary[index + 2]) {
+            index = -2;
+          }
+          if (c === boundary[index + 2]) {
+            index++;
+          }
+          break;
+        case STATE.HEADER_FIELD_START:
+          state = STATE.HEADER_FIELD;
+          setMark('headerField');
+          index = 0;
+        case STATE.HEADER_FIELD:
+          if (c === CR) {
+            clearMarkSymbol('headerField');
+            state = STATE.HEADERS_ALMOST_DONE;
+            break;
+          }
+
+          index++;
+          if (c === HYPHEN) {
+            break;
+          }
+
+          if (c === COLON) {
+            if (index === 1) {
+              // empty header field
+              return i;
+            }
+            dataCallback('headerField', true);
+            state = STATE.HEADER_VALUE_START;
+            break;
+          }
+
+          cl = lower(c);
+          if (cl < A || cl > Z) {
+            return i;
+          }
+          break;
+        case STATE.HEADER_VALUE_START:
+          if (c === SPACE) {
+            break;
+          }
+
+          setMark('headerValue');
+          state = STATE.HEADER_VALUE;
+        case STATE.HEADER_VALUE:
+          if (c === CR) {
+            dataCallback('headerValue', true);
+            this._handleCallback('headerEnd');
+            state = STATE.HEADER_VALUE_ALMOST_DONE;
+          }
+          break;
+        case STATE.HEADER_VALUE_ALMOST_DONE:
+          if (c !== LF) {
+            return i;
+          }
+          state = STATE.HEADER_FIELD_START;
+          break;
+        case STATE.HEADERS_ALMOST_DONE:
+          if (c !== LF) {
+            return i;
+          }
+
+          this._handleCallback('headersEnd');
+          state = STATE.PART_DATA_START;
+          break;
+        case STATE.PART_DATA_START:
+          state = STATE.PART_DATA;
+          setMark('partData');
+        case STATE.PART_DATA:
+          prevIndex = index;
+
+          if (index === 0) {
+            // boyer-moore derrived algorithm to safely skip non-boundary data
+            i += boundaryEnd;
+            while (i < this.bufferLength && !(buffer[i] in boundaryChars)) {
+              i += boundaryLength;
+            }
+            i -= boundaryEnd;
+            c = buffer[i];
+          }
+
+          if (index < boundary.length) {
+            if (boundary[index] === c) {
+              if (index === 0) {
+                dataCallback('partData', true);
+              }
+              index++;
+            } else {
+              index = 0;
+            }
+          } else if (index === boundary.length) {
+            index++;
+            if (c === CR) {
+              // CR = part boundary
+              flags |= FBOUNDARY.PART_BOUNDARY;
+            } else if (c === HYPHEN) {
+              // HYPHEN = end boundary
+              flags |= FBOUNDARY.LAST_BOUNDARY;
+            } else {
+              index = 0;
+            }
+          } else if (index - 1 === boundary.length) {
+            if (flags & FBOUNDARY.PART_BOUNDARY) {
+              index = 0;
+              if (c === LF) {
+                // unset the PART_BOUNDARY flag
+                flags &= ~FBOUNDARY.PART_BOUNDARY;
+                this._handleCallback('partEnd');
+                this._handleCallback('partBegin');
+                state = STATE.HEADER_FIELD_START;
+                break;
+              }
+            } else if (flags & FBOUNDARY.LAST_BOUNDARY) {
+              if (c === HYPHEN) {
+                this._handleCallback('partEnd');
+                this._handleCallback('end');
+                state = STATE.END;
+                flags = 0;
+              } else {
+                index = 0;
+              }
+            } else {
+              index = 0;
+            }
+          }
+
+          if (index > 0) {
+            // when matching a possible boundary, keep a lookbehind reference
+            // in case it turns out to be a false lead
+            lookbehind[index - 1] = c;
+          } else if (prevIndex > 0) {
+            // if our boundary turned out to be rubbish, the captured lookbehind
+            // belongs to partData
+            this._handleCallback('partData', lookbehind, 0, prevIndex);
+            prevIndex = 0;
+            setMark('partData');
+
+            // reconsider the current character even so it interrupted the sequence
+            // it could be the beginning of a new sequence
+            i--;
+          }
+
+          break;
+        case STATE.END:
+          break;
+        default:
+          return i;
+      }
+    }
+
+    dataCallback('headerField');
+    dataCallback('headerValue');
+    dataCallback('partData');
+
+    this.index = index;
+    this.state = state;
+    this.flags = flags;
+
+    done();
+    return this.bufferLength;
+  }
+
+  explain() {
+    return `state = ${MultipartParser.stateToString(this.state)}`;
+  }
+}
+
+// eslint-disable-next-line consistent-return
+MultipartParser.stateToString = (stateNumber) => {
+  // eslint-disable-next-line no-restricted-syntax, guard-for-in
+  for (const stateName in STATE) {
+    const number = STATE[stateName];
+    if (number === stateNumber) return stateName;
+  }
+};
+
+module.exports = Object.assign(MultipartParser, { STATES: exports.STATES });