Setting up CDN

Author: graham-trott

easycoder/plugins/anagrams.js

@@ -0,0 +1,46 @@
+// eslint-disable-next-line no-unused-vars
+const EasyCoder_Anagrams = {
+
+	name: `EasyCoder_Anagrams`,
+
+	value: {
+
+		compile: (compiler) => {
+			if (compiler.tokenIs(`anagrams`)) {
+				if (compiler.nextTokenIs(`of`)) {
+					const value = compiler.getNextValue();
+					return {
+						domain: `anagrams`,
+						type: `getAnagrams`,
+						value
+					};
+				}
+			}
+			return null;
+		},
+
+		get: (program, value) => {
+			switch (value.type) {
+			case `getAnagrams`:
+				return {
+					type: `constant`,
+					numeric: false,
+					content: JSON.stringify(AnagramFinder.getAnagrams(program.getValue(value.value), EasyCoder_words))
+				};
+			}
+			return null;
+		}
+	},
+
+	getHandler: () => {
+		return null;
+	},
+
+	condition: {
+
+		compile: () => {}
+	}
+};
+
+// eslint-disable-next-line no-unused-vars
+EasyCoder.domain.anagrams = EasyCoder_Anagrams;

easycoder/plugins/aws.js

@@ -0,0 +1,234 @@
+const EasyCoder_AWS = {
+
+	name: `EasyCoder_AWS`,
+
+	AWS: {
+
+		compile: (compiler) => {
+			const lino = compiler.getLino();
+			const request = compiler.nextToken();
+			switch (request) {
+			case `get`:
+				if (compiler.nextIsSymbol(true)) {
+					const targetRecord = compiler.getSymbolRecord();
+					if (targetRecord.keyword === `variable`) {
+						if (compiler.nextTokenIs(`from`)) {
+							const url = compiler.getNextValue();
+							let onError = null;
+							if (compiler.tokenIs(`or`)) {
+								compiler.next();
+								onError = compiler.getPc() + 1;
+								compiler.completeHandler();
+							}
+							compiler.addCommand({
+								domain: `aws`,
+								keyword: `aws`,
+								lino,
+								request: `get`,
+								target: targetRecord.name,
+								url,
+								onError
+							});
+							return true;
+						}
+					}
+				}
+				break;
+			case `post`:
+				const value = compiler.getNextValue();
+				let target = null;
+				if (compiler.tokenIs(`giving`)) {
+					if (compiler.nextIsSymbol()) {
+						const targetRecord = compiler.getSymbolRecord();
+						if (targetRecord.isVHolder) {
+							target = targetRecord.name;
+							compiler.next();
+						} else {
+							throw new Error(`'${targetRecord.name}' cannot hold a value`);
+						}
+					}
+				}
+				onError = null;
+				if (compiler.tokenIs(`or`)) {
+					compiler.next();
+					onError = compiler.getPc() + 1;
+					compiler.completeHandler();
+				}
+				compiler.addCommand({
+					domain: `aws`,
+					keyword: `aws`,
+					lino,
+					request: `post`,
+					value,
+					target,
+					onError
+				});
+				return true;
+			case `delete`:
+				if (compiler.nextIsSymbol(true)) {
+					const targetRecord = compiler.getSymbolRecord();
+					if (targetRecord.keyword === `variable`) {
+						let onError = null;
+						if (compiler.tokenIs(`or`)) {
+							compiler.next();
+							onError = compiler.getPc() + 1;
+							compiler.completeHandler();
+						}
+						compiler.next();
+						compiler.addCommand({
+							domain: `aws`,
+							keyword: `aws`,
+							lino,
+							request: `delete`,
+							target: targetRecord.name,
+							onError
+						});
+						return true;
+					}
+				}
+				break;
+			case `set`:
+				if (compiler.nextTokenIs(`the`)) {
+					compiler.next();
+				}
+				if (compiler.tokenIs(`url`)) {
+					if (compiler.nextTokenIs(`to`)) {
+						const url = compiler.getNextValue();
+						compiler.addCommand({
+							domain: `aws`,
+							keyword: `aws`,
+							lino,
+							request: `setUrl`,
+							url
+						});
+						return true;
+					}
+				}
+				return false;
+			}
+			return false;
+		},
+
+		run: (program) => {
+			const createCORSRequest = function (method, url) {
+				let xhr = new XMLHttpRequest();
+				if (`withCredentials` in xhr) {
+					// Most browsers.
+					xhr.open(method, url, true);
+				} else if (typeof XDomainRequest != `undefined`) {
+					// IE8 & IE9
+					xhr = new XDomainRequest();
+					xhr.open(method, url);
+				} else {
+					// CORS not supported.
+					xhr = null;
+				}
+				return xhr;
+			};
+
+			const command = program[program.pc];
+			if (command.request === `setUrl`) {
+				EasyCoder_AWS.url = program.getValue(command.url);
+				return command.pc + 1;
+			} else if ([`get`, `post`, `delete`].includes(command.request)) {
+				const method = command.request.toUpperCase();
+				const url = `${EasyCoder_AWS.url}${program.getValue(command.url)}`;
+				const request = createCORSRequest(method, url);
+				if (!request) {
+					program.runtimeError(command.lino, `CORS not supported`);
+					return command.pc + 1;
+				}
+				request.setRequestHeader(`Content-Type`, `application/json; charset=UTF-8`);
+				request.command = command;
+				switch (command.request) {
+				case `get`:
+				case `delete`:
+					request.send();
+					break;
+				case `post`:
+					const value = program.getValue(command.value);
+					console.log(`POST to ${EasyCoder_AWS.url}`);
+					if ([`[`, `{`].includes(value.charAt(0))) {
+						request.setRequestHeader(`Content-Type`, `application/json; charset=UTF-8`);
+						//            console.log(`value=${value}`);
+						request.send(value);
+					} else {
+						request.setRequestHeader(`Content-Type`, `text/plain; charset=UTF-8`);
+						// console.log(`value=${program.encode(value)}`);
+						request.send(program.encode(value));
+					}
+					break;
+				}
+
+				request.onload = function () {
+					var content = request.responseText;
+					if (content.length > 0 && ![`[`, `{`].includes(content.charAt(0))) {
+						content = program.decode(content);
+					// } else {
+					// 	content = JSON.parse(content);
+					}
+					if (command.target) {
+						const targetRecord = program.getSymbolRecord(command.target);
+						targetRecord.value[targetRecord.index] = {
+							type: `constant`,
+							numeric: false,
+							content
+						};
+					}
+					program.run(command.pc + 1);
+				};
+
+				request.onerror = function () {
+					if (command.onError) {
+						program.errorMessage = this.responseText;
+						program.run(command.onError);
+					} else {
+						const error = this.responseText;
+						program.runtimeError(command.lino, error);
+					}
+				};
+				
+				return 0;
+			}
+		}
+	},
+
+	getHandler: (name) => {
+		switch (name) {
+		case `aws`:
+			return EasyCoder_AWS.AWS;
+		default:
+			return null;
+		}
+	},
+
+	run: (program) => {
+		const command = program[program.pc];
+		const handler = EasyCoder_AWS.getHandler(command.keyword);
+		if (!handler) {
+			program.runtimeError(command.lino, `Unknown keyword '${command.keyword}' in 'aws' package`);
+		}
+		return handler.run(program);
+	},
+
+	value: {
+
+		compile: () => {
+			return null;
+		},
+
+		get: () => {
+			return null;
+		}
+	},
+
+	condition: {
+
+		compile: () => {},
+
+		test: () => {}
+	}
+};
+
+// eslint-disable-next-line no-unused-vars
+EasyCoder.domain.aws = EasyCoder_AWS;