hookFetch

only hookFetch

Version vom 06.05.2023. Aktuellste Version

Dieses Skript sollte nicht direkt installiert werden. Es handelt sich hier um eine Bibliothek für andere Skripte, welche über folgenden Befehl in den Metadaten eines Skriptes eingebunden wird // @require https://update.greatest.deepsurf.us/scripts/465483/1186372/hookFetch.js

(() => {
    var contextWindow = window.unsafeWindow || document.defaultView || window;
    if (contextWindow['__hookRequest__'] != null) {
        return;
    }
    var globalVariable = new Map();
    var FetchMapList = new Map();
    var XhrMapList = new Map();

    function deliveryTask(callbackList, _object, period) {
        let newObject = _object;
        for (let i = 0; i < callbackList.length; i++) {
            let tempObject = null;
            try {
                tempObject = callbackList[i](newObject, period);
            } catch (e) {
                new Error(e);
            }
            if (tempObject == null) {
                continue;
            }
            newObject = tempObject;
        }
        return newObject;
    }

    function hookFetch() {
        const originalFetch = contextWindow.fetch;
        globalVariable.set('Fetch', originalFetch);
        contextWindow.fetch = (...args) => {
            let U = args[0];
            if (U.indexOf('http') == -1) {
                if (U[0] !== '/') {
                    let pathname = new URL(location.href).pathname;
                    U = pathname + U;
                }
                U = location.origin + U;
            }
            let apply = null;
            (() => {
                let url = new URL(U),
                    pathname = url.pathname,
                    callback = FetchMapList.get(pathname);
                if (callback == null) return;
                if (callback.length === 0) return;
                let newObject = deliveryTask(callback, { args }, 'preRequest');
                if (newObject && newObject.args) {
                    args = newObject.args;
                }
                apply = originalFetch.apply(this, args);
                apply.then((response) => {
                    let originalGetReader = response.body.getReader;
                    response.body.getReader = function () {
                        let originalReader = originalGetReader.apply(this, arguments);
                        let originalRead = originalReader.read;
                        originalReader.read = function () {
                            return originalRead.apply(this, arguments).then(function (result) {
                                let tempObject = deliveryTask(callback, { result, args }, 'doing');
                                if (tempObject && tempObject.result) {
                                    result = tempObject.result;
                                }
                                return result;
                            });
                        };
                        return originalReader;
                    };
                    let text = response.text,
                        json = response.json;
                    response.text = () => {
                        return text.apply(response).then((text) => {
                            let _object = deliveryTask(callback, { text, args }, 'done');
                            if (_object && _object.text) {
                                text = _object.text;
                            }
                            return text;
                        });
                    };
                    response.json = () => {
                        return json.apply(response).then((json) => {
                            let text = JSON.stringify(json);
                            let _object = deliveryTask(callback, { text, args }, 'done');
                            if (_object && _object.text) {
                                text = _object.text;
                                return JSON.parse(text);
                            }
                            return json;
                        });
                    };
                });
            })();
            if (apply == null) {
                apply = originalFetch.apply(this, args);
            }
            return apply;
        };
    }

    function hookXhr() {
        const oldXHR = contextWindow.XMLHttpRequest;
        globalVariable.set('XMLHttpRequest', oldXHR);
        const XHRProxy = new Proxy(contextWindow.XMLHttpRequest, {
            construct(target, args) {
                let xhr = new target(...args);
                let originalOpen = xhr.open;
                let originalSend = xhr.send;
                let url = '';
                xhr.open = function () {
                    url = arguments[1];
                    return originalOpen.apply(xhr, arguments);
                };
                xhr.send = function () {
                    let args = arguments;
                    let U = xhr.responseURL == '' ? url : xhr.responseURL;
                    if (U.indexOf('http') == -1) {
                        if (U[0] !== '/') {
                            let pathname = new URL(location.href).pathname;
                            U = pathname + U;
                        }
                        U = location.origin + U;
                    }
                    let pathname = new URL(U).pathname;
                    let callback = XhrMapList.get(pathname);
                    let skip = false;
                    if (callback == null || callback.length === 0) {
                        skip = true;
                    }
                    if (!skip) {
                        let newObject = deliveryTask(callback, { args }, 'preRequest');
                        if (newObject && newObject.args) {
                            args = newObject.args;
                        }
                        const onReadyStateChangeOriginal = xhr.onreadystatechange;
                        xhr.onreadystatechange = function () {
                            if (xhr.readyState === 4 && xhr.status === 200) {
                                let text = xhr.responseText;
                                let newObject = deliveryTask(callback, { text, args }, 'done');
                                if (newObject && newObject.text) {
                                    xhr.responseText = newObject.text;
                                    if (xhr.responseText !== newObject.text) {
                                        debugger;
                                    }
                                }
                            }
                            onReadyStateChangeOriginal && onReadyStateChangeOriginal.apply(xhr, args);
                        };
                    }
                    return originalSend.apply(xhr, args);
                };
                return xhr;
            }
        });
        contextWindow.XMLHttpRequest = XHRProxy;
    }

    (async () => {
        hookFetch();
    })();
    (async () => {
        hookXhr();
    })();

    contextWindow['__hookRequest__'] = {
        FetchCallback: {
            add: (pathname, callback) => {
                let list = FetchMapList.get(pathname) || (FetchMapList.set(pathname, []), FetchMapList.get(pathname));
                list.push(callback);
                let index = list.length;
                return index;
            },
            del: (pathname, index) => {
                try {
                    let list = FetchMapList.get(pathname);
                    if (list == null) return false;
                    list.splice(index - 1, 1);
                } catch (e) {
                    new Error(e);
                    return false;
                }
                return true;
            }
        },
        XhrCallback: {
            add: (pathname, callback) => {
                let list = XhrMapList.get(pathname) || (XhrMapList.set(pathname, []), XhrMapList.get(pathname));
                list.push(callback);
                let index = list.length;
                return index;
            },
            del: (pathname, index) => {
                try {
                    let list = XhrMapList.get(pathname);
                    if (list == null) return false;
                    list.splice(index - 1, 1);
                } catch (e) {
                    new Error(e);
                    return false;
                }
                return true;
            }
        },
        globalVariable: {
            get: (key) => {
                return globalVariable.get(key);
            },
            getAll: () => {
                return globalVariable.entries();
            },
            set: (key, value) => {
                globalVariable.set(key, value);
            },
            getOrDrfault: (key, defaultValue) => {
                return globalVariable.get(key) || defaultValue;
            }
        }
    };
})();