chore: add project dependencies and configuration files

Initial setup of project dependencies including axios, express, dotenv, and other supporting packages. Added configuration files and documentation for project setup and usage.

node_modules/axios/lib/core/AxiosHeaders.js

@@ -0,0 +1,314 @@
+'use strict';
+
+import utils from '../utils.js';
+import parseHeaders from '../helpers/parseHeaders.js';
+
+const $internals = Symbol('internals');
+
+function normalizeHeader(header) {
+  return header && String(header).trim().toLowerCase();
+}
+
+function normalizeValue(value) {
+  if (value === false || value == null) {
+    return value;
+  }
+
+  return utils.isArray(value) ? value.map(normalizeValue) : String(value);
+}
+
+function parseTokens(str) {
+  const tokens = Object.create(null);
+  const tokensRE = /([^\s,;=]+)\s*(?:=\s*([^,;]+))?/g;
+  let match;
+
+  while ((match = tokensRE.exec(str))) {
+    tokens[match[1]] = match[2];
+  }
+
+  return tokens;
+}
+
+const isValidHeaderName = (str) => /^[-_a-zA-Z0-9^`|~,!#$%&'*+.]+$/.test(str.trim());
+
+function matchHeaderValue(context, value, header, filter, isHeaderNameFilter) {
+  if (utils.isFunction(filter)) {
+    return filter.call(this, value, header);
+  }
+
+  if (isHeaderNameFilter) {
+    value = header;
+  }
+
+  if (!utils.isString(value)) return;
+
+  if (utils.isString(filter)) {
+    return value.indexOf(filter) !== -1;
+  }
+
+  if (utils.isRegExp(filter)) {
+    return filter.test(value);
+  }
+}
+
+function formatHeader(header) {
+  return header.trim()
+    .toLowerCase().replace(/([a-z\d])(\w*)/g, (w, char, str) => {
+      return char.toUpperCase() + str;
+    });
+}
+
+function buildAccessors(obj, header) {
+  const accessorName = utils.toCamelCase(' ' + header);
+
+  ['get', 'set', 'has'].forEach(methodName => {
+    Object.defineProperty(obj, methodName + accessorName, {
+      value: function(arg1, arg2, arg3) {
+        return this[methodName].call(this, header, arg1, arg2, arg3);
+      },
+      configurable: true
+    });
+  });
+}
+
+class AxiosHeaders {
+  constructor(headers) {
+    headers && this.set(headers);
+  }
+
+  set(header, valueOrRewrite, rewrite) {
+    const self = this;
+
+    function setHeader(_value, _header, _rewrite) {
+      const lHeader = normalizeHeader(_header);
+
+      if (!lHeader) {
+        throw new Error('header name must be a non-empty string');
+      }
+
+      const key = utils.findKey(self, lHeader);
+
+      if(!key || self[key] === undefined || _rewrite === true || (_rewrite === undefined && self[key] !== false)) {
+        self[key || _header] = normalizeValue(_value);
+      }
+    }
+
+    const setHeaders = (headers, _rewrite) =>
+      utils.forEach(headers, (_value, _header) => setHeader(_value, _header, _rewrite));
+
+    if (utils.isPlainObject(header) || header instanceof this.constructor) {
+      setHeaders(header, valueOrRewrite)
+    } else if(utils.isString(header) && (header = header.trim()) && !isValidHeaderName(header)) {
+      setHeaders(parseHeaders(header), valueOrRewrite);
+    } else if (utils.isObject(header) && utils.isIterable(header)) {
+      let obj = {}, dest, key;
+      for (const entry of header) {
+        if (!utils.isArray(entry)) {
+          throw TypeError('Object iterator must return a key-value pair');
+        }
+
+        obj[key = entry[0]] = (dest = obj[key]) ?
+          (utils.isArray(dest) ? [...dest, entry[1]] : [dest, entry[1]]) : entry[1];
+      }
+
+      setHeaders(obj, valueOrRewrite)
+    } else {
+      header != null && setHeader(valueOrRewrite, header, rewrite);
+    }
+
+    return this;
+  }
+
+  get(header, parser) {
+    header = normalizeHeader(header);
+
+    if (header) {
+      const key = utils.findKey(this, header);
+
+      if (key) {
+        const value = this[key];
+
+        if (!parser) {
+          return value;
+        }
+
+        if (parser === true) {
+          return parseTokens(value);
+        }
+
+        if (utils.isFunction(parser)) {
+          return parser.call(this, value, key);
+        }
+
+        if (utils.isRegExp(parser)) {
+          return parser.exec(value);
+        }
+
+        throw new TypeError('parser must be boolean|regexp|function');
+      }
+    }
+  }
+
+  has(header, matcher) {
+    header = normalizeHeader(header);
+
+    if (header) {
+      const key = utils.findKey(this, header);
+
+      return !!(key && this[key] !== undefined && (!matcher || matchHeaderValue(this, this[key], key, matcher)));
+    }
+
+    return false;
+  }
+
+  delete(header, matcher) {
+    const self = this;
+    let deleted = false;
+
+    function deleteHeader(_header) {
+      _header = normalizeHeader(_header);
+
+      if (_header) {
+        const key = utils.findKey(self, _header);
+
+        if (key && (!matcher || matchHeaderValue(self, self[key], key, matcher))) {
+          delete self[key];
+
+          deleted = true;
+        }
+      }
+    }
+
+    if (utils.isArray(header)) {
+      header.forEach(deleteHeader);
+    } else {
+      deleteHeader(header);
+    }
+
+    return deleted;
+  }
+
+  clear(matcher) {
+    const keys = Object.keys(this);
+    let i = keys.length;
+    let deleted = false;
+
+    while (i--) {
+      const key = keys[i];
+      if(!matcher || matchHeaderValue(this, this[key], key, matcher, true)) {
+        delete this[key];
+        deleted = true;
+      }
+    }
+
+    return deleted;
+  }
+
+  normalize(format) {
+    const self = this;
+    const headers = {};
+
+    utils.forEach(this, (value, header) => {
+      const key = utils.findKey(headers, header);
+
+      if (key) {
+        self[key] = normalizeValue(value);
+        delete self[header];
+        return;
+      }
+
+      const normalized = format ? formatHeader(header) : String(header).trim();
+
+      if (normalized !== header) {
+        delete self[header];
+      }
+
+      self[normalized] = normalizeValue(value);
+
+      headers[normalized] = true;
+    });
+
+    return this;
+  }
+
+  concat(...targets) {
+    return this.constructor.concat(this, ...targets);
+  }
+
+  toJSON(asStrings) {
+    const obj = Object.create(null);
+
+    utils.forEach(this, (value, header) => {
+      value != null && value !== false && (obj[header] = asStrings && utils.isArray(value) ? value.join(', ') : value);
+    });
+
+    return obj;
+  }
+
+  [Symbol.iterator]() {
+    return Object.entries(this.toJSON())[Symbol.iterator]();
+  }
+
+  toString() {
+    return Object.entries(this.toJSON()).map(([header, value]) => header + ': ' + value).join('\n');
+  }
+
+  getSetCookie() {
+    return this.get("set-cookie") || [];
+  }
+
+  get [Symbol.toStringTag]() {
+    return 'AxiosHeaders';
+  }
+
+  static from(thing) {
+    return thing instanceof this ? thing : new this(thing);
+  }
+
+  static concat(first, ...targets) {
+    const computed = new this(first);
+
+    targets.forEach((target) => computed.set(target));
+
+    return computed;
+  }
+
+  static accessor(header) {
+    const internals = this[$internals] = (this[$internals] = {
+      accessors: {}
+    });
+
+    const accessors = internals.accessors;
+    const prototype = this.prototype;
+
+    function defineAccessor(_header) {
+      const lHeader = normalizeHeader(_header);
+
+      if (!accessors[lHeader]) {
+        buildAccessors(prototype, _header);
+        accessors[lHeader] = true;
+      }
+    }
+
+    utils.isArray(header) ? header.forEach(defineAccessor) : defineAccessor(header);
+
+    return this;
+  }
+}
+
+AxiosHeaders.accessor(['Content-Type', 'Content-Length', 'Accept', 'Accept-Encoding', 'User-Agent', 'Authorization']);
+
+// reserved names hotfix
+utils.reduceDescriptors(AxiosHeaders.prototype, ({value}, key) => {
+  let mapped = key[0].toUpperCase() + key.slice(1); // map `set` => `Set`
+  return {
+    get: () => value,
+    set(headerValue) {
+      this[mapped] = headerValue;
+    }
+  }
+});
+
+utils.freezeMethods(AxiosHeaders);
+
+export default AxiosHeaders;