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netdisk-fast-download/parser/src/main/resources/custom-parsers/fetch-demo.js
2025-12-06 22:44:52 +00:00

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// ==UserScript==
// @name Fetch API示例解析器
// @type fetch_demo
// @displayName Fetch演示
// @description 演示如何在ES5环境中使用fetch API和async/await
// @match https?://example\.com/s/(?<KEY>\w+)
// @author QAIU
// @version 1.0.0
// ==/UserScript==
// 使用require导入类型定义仅用于IDE类型提示
var types = require('./types');
/** @typedef {types.ShareLinkInfo} ShareLinkInfo */
/** @typedef {types.JsHttpClient} JsHttpClient */
/** @typedef {types.JsLogger} JsLogger */
/**
* 演示使用fetch API的解析器
* 注意虽然源码中使用了ES6+语法async/await但在浏览器中会被编译为ES5
*
* @param {ShareLinkInfo} shareLinkInfo - 分享链接信息
* @param {JsHttpClient} http - HTTP客户端传统方式
* @param {JsLogger} logger - 日志对象
* @returns {string} 下载链接
*/
function parse(shareLinkInfo, http, logger) {
logger.info("=== Fetch API Demo ===");
// 方式1使用传统的http对象同步
logger.info("方式1: 使用传统http对象");
var response1 = http.get("https://httpbin.org/get");
logger.info("状态码: " + response1.statusCode());
// 方式2使用fetch API基于Promise
logger.info("方式2: 使用fetch API");
// 注意在ES5环境中我们需要手动处理Promise
// 这个示例展示了如何在ES5中使用fetch
var fetchPromise = fetch("https://httpbin.org/get");
// 等待Promise完成同步等待模拟
var result = null;
var error = null;
fetchPromise
.then(function(response) {
logger.info("Fetch响应状态: " + response.status);
return response.text();
})
.then(function(text) {
logger.info("Fetch响应内容: " + text.substring(0, 100) + "...");
result = "https://example.com/download/demo.file";
})
['catch'](function(err) {
logger.error("Fetch失败: " + err.message);
error = err;
});
// 简单的等待循环(实际场景中不推荐,这里仅作演示)
var timeout = 5000; // 5秒超时
var start = Date.now();
while (result === null && error === null && (Date.now() - start) < timeout) {
// 等待Promise完成
java.lang.Thread.sleep(10);
}
if (error !== null) {
throw error;
}
if (result === null) {
throw new Error("Fetch超时");
}
return result;
}
/**
* 演示POST请求
*/
function demonstratePost(logger) {
logger.info("=== 演示POST请求 ===");
var postPromise = fetch("https://httpbin.org/post", {
method: "POST",
headers: {
"Content-Type": "application/json"
},
body: JSON.stringify({
key: "value",
demo: true
})
});
postPromise
.then(function(response) {
return response.json();
})
.then(function(data) {
logger.info("POST响应: " + JSON.stringify(data));
})
['catch'](function(err) {
logger.error("POST失败: " + err.message);
});
}