Change endpoint from persons to people

backend/apis/nodejs/node_modules/nodemailer/lib/dkim/message-parser.js

@@ -0,0 +1,155 @@
+'use strict';
+
+const Transform = require('stream').Transform;
+
+/**
+ * MessageParser instance is a transform stream that separates message headers
+ * from the rest of the body. Headers are emitted with the 'headers' event. Message
+ * body is passed on as the resulting stream.
+ */
+class MessageParser extends Transform {
+    constructor(options) {
+        super(options);
+        this.lastBytes = Buffer.alloc(4);
+        this.headersParsed = false;
+        this.headerBytes = 0;
+        this.headerChunks = [];
+        this.rawHeaders = false;
+        this.bodySize = 0;
+    }
+
+    /**
+     * Keeps count of the last 4 bytes in order to detect line breaks on chunk boundaries
+     *
+     * @param {Buffer} data Next data chunk from the stream
+     */
+    updateLastBytes(data) {
+        let lblen = this.lastBytes.length;
+        let nblen = Math.min(data.length, lblen);
+
+        // shift existing bytes
+        for (let i = 0, len = lblen - nblen; i < len; i++) {
+            this.lastBytes[i] = this.lastBytes[i + nblen];
+        }
+
+        // add new bytes
+        for (let i = 1; i <= nblen; i++) {
+            this.lastBytes[lblen - i] = data[data.length - i];
+        }
+    }
+
+    /**
+     * Finds and removes message headers from the remaining body. We want to keep
+     * headers separated until final delivery to be able to modify these
+     *
+     * @param {Buffer} data Next chunk of data
+     * @return {Boolean} Returns true if headers are already found or false otherwise
+     */
+    checkHeaders(data) {
+        if (this.headersParsed) {
+            return true;
+        }
+
+        let lblen = this.lastBytes.length;
+        let headerPos = 0;
+        this.curLinePos = 0;
+        for (let i = 0, len = this.lastBytes.length + data.length; i < len; i++) {
+            let chr;
+            if (i < lblen) {
+                chr = this.lastBytes[i];
+            } else {
+                chr = data[i - lblen];
+            }
+            if (chr === 0x0a && i) {
+                let pr1 = i - 1 < lblen ? this.lastBytes[i - 1] : data[i - 1 - lblen];
+                let pr2 = i > 1 ? (i - 2 < lblen ? this.lastBytes[i - 2] : data[i - 2 - lblen]) : false;
+                if (pr1 === 0x0a) {
+                    this.headersParsed = true;
+                    headerPos = i - lblen + 1;
+                    this.headerBytes += headerPos;
+                    break;
+                } else if (pr1 === 0x0d && pr2 === 0x0a) {
+                    this.headersParsed = true;
+                    headerPos = i - lblen + 1;
+                    this.headerBytes += headerPos;
+                    break;
+                }
+            }
+        }
+
+        if (this.headersParsed) {
+            this.headerChunks.push(data.slice(0, headerPos));
+            this.rawHeaders = Buffer.concat(this.headerChunks, this.headerBytes);
+            this.headerChunks = null;
+            this.emit('headers', this.parseHeaders());
+            if (data.length - 1 > headerPos) {
+                let chunk = data.slice(headerPos);
+                this.bodySize += chunk.length;
+                // this would be the first chunk of data sent downstream
+                setImmediate(() => this.push(chunk));
+            }
+            return false;
+        } else {
+            this.headerBytes += data.length;
+            this.headerChunks.push(data);
+        }
+
+        // store last 4 bytes to catch header break
+        this.updateLastBytes(data);
+
+        return false;
+    }
+
+    _transform(chunk, encoding, callback) {
+        if (!chunk || !chunk.length) {
+            return callback();
+        }
+
+        if (typeof chunk === 'string') {
+            chunk = Buffer.from(chunk, encoding);
+        }
+
+        let headersFound;
+
+        try {
+            headersFound = this.checkHeaders(chunk);
+        } catch (E) {
+            return callback(E);
+        }
+
+        if (headersFound) {
+            this.bodySize += chunk.length;
+            this.push(chunk);
+        }
+
+        setImmediate(callback);
+    }
+
+    _flush(callback) {
+        if (this.headerChunks) {
+            let chunk = Buffer.concat(this.headerChunks, this.headerBytes);
+            this.bodySize += chunk.length;
+            this.push(chunk);
+            this.headerChunks = null;
+        }
+        callback();
+    }
+
+    parseHeaders() {
+        let lines = (this.rawHeaders || '').toString().split(/\r?\n/);
+        for (let i = lines.length - 1; i > 0; i--) {
+            if (/^\s/.test(lines[i])) {
+                lines[i - 1] += '\n' + lines[i];
+                lines.splice(i, 1);
+            }
+        }
+        return lines
+            .filter(line => line.trim())
+            .map(line => ({
+                key: line.substr(0, line.indexOf(':')).trim().toLowerCase(),
+                line
+            }));
+    }
+}
+
+module.exports = MessageParser;